diff options
Diffstat (limited to 'arch/unicore32/kernel')
33 files changed, 0 insertions, 6128 deletions
diff --git a/arch/unicore32/kernel/Makefile b/arch/unicore32/kernel/Makefile deleted file mode 100644 index 2f79aa56735b..000000000000 --- a/arch/unicore32/kernel/Makefile +++ /dev/null @@ -1,31 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Makefile for the linux kernel. -# - -# Object file lists. -obj-y := dma.o elf.o entry.o process.o ptrace.o -obj-y += setup.o signal.o sys.o stacktrace.o traps.o - -obj-$(CONFIG_MODULES) += ksyms.o module.o -obj-$(CONFIG_EARLY_PRINTK) += early_printk.o - -obj-$(CONFIG_UNICORE_FPU_F64) += fpu-ucf64.o - -# obj-y for architecture PKUnity v3 -obj-$(CONFIG_ARCH_PUV3) += clock.o irq.o time.o - -obj-$(CONFIG_PUV3_GPIO) += gpio.o -obj-$(CONFIG_PUV3_PM) += pm.o sleep.o -obj-$(CONFIG_HIBERNATION) += hibernate.o hibernate_asm.o - -obj-$(CONFIG_PCI) += pci.o - -# obj-y for specific machines -obj-$(CONFIG_ARCH_PUV3) += puv3-core.o -obj-$(CONFIG_PUV3_NB0916) += puv3-nb0916.o - -head-y := head.o -obj-$(CONFIG_DEBUG_LL) += debug.o - -extra-y := $(head-y) vmlinux.lds diff --git a/arch/unicore32/kernel/asm-offsets.c b/arch/unicore32/kernel/asm-offsets.c deleted file mode 100644 index f7d672267549..000000000000 --- a/arch/unicore32/kernel/asm-offsets.c +++ /dev/null @@ -1,108 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/asm-offsets.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - * - * Generate definitions needed by assembly language modules. - * This code generates raw asm output which is post-processed to extract - * and format the required data. - */ -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/dma-mapping.h> -#include <linux/kbuild.h> -#include <linux/suspend.h> -#include <linux/thread_info.h> -#include <asm/memory.h> -#include <asm/suspend.h> - -/* - * GCC 3.0, 3.1: general bad code generation. - * GCC 3.2.0: incorrect function argument offset calculation. - * GCC 3.2.x: miscompiles NEW_AUX_ENT in fs/binfmt_elf.c - * (http://gcc.gnu.org/PR8896) and incorrect structure - * initialisation in fs/jffs2/erase.c - */ -#if (__GNUC__ < 4) -#error Your compiler should upgrade to uc4 -#error Known good compilers: 4.2.2 -#endif - -int main(void) -{ - DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm)); - BLANK(); - DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); - DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count)); - DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit)); - DEFINE(TI_TASK, offsetof(struct thread_info, task)); - DEFINE(TI_CPU, offsetof(struct thread_info, cpu)); - DEFINE(TI_CPU_SAVE, offsetof(struct thread_info, cpu_context)); - DEFINE(TI_USED_CP, offsetof(struct thread_info, used_cp)); -#ifdef CONFIG_UNICORE_FPU_F64 - DEFINE(TI_FPSTATE, offsetof(struct thread_info, fpstate)); -#endif - BLANK(); - DEFINE(S_R0, offsetof(struct pt_regs, UCreg_00)); - DEFINE(S_R1, offsetof(struct pt_regs, UCreg_01)); - DEFINE(S_R2, offsetof(struct pt_regs, UCreg_02)); - DEFINE(S_R3, offsetof(struct pt_regs, UCreg_03)); - DEFINE(S_R4, offsetof(struct pt_regs, UCreg_04)); - DEFINE(S_R5, offsetof(struct pt_regs, UCreg_05)); - DEFINE(S_R6, offsetof(struct pt_regs, UCreg_06)); - DEFINE(S_R7, offsetof(struct pt_regs, UCreg_07)); - DEFINE(S_R8, offsetof(struct pt_regs, UCreg_08)); - DEFINE(S_R9, offsetof(struct pt_regs, UCreg_09)); - DEFINE(S_R10, offsetof(struct pt_regs, UCreg_10)); - DEFINE(S_R11, offsetof(struct pt_regs, UCreg_11)); - DEFINE(S_R12, offsetof(struct pt_regs, UCreg_12)); - DEFINE(S_R13, offsetof(struct pt_regs, UCreg_13)); - DEFINE(S_R14, offsetof(struct pt_regs, UCreg_14)); - DEFINE(S_R15, offsetof(struct pt_regs, UCreg_15)); - DEFINE(S_R16, offsetof(struct pt_regs, UCreg_16)); - DEFINE(S_R17, offsetof(struct pt_regs, UCreg_17)); - DEFINE(S_R18, offsetof(struct pt_regs, UCreg_18)); - DEFINE(S_R19, offsetof(struct pt_regs, UCreg_19)); - DEFINE(S_R20, offsetof(struct pt_regs, UCreg_20)); - DEFINE(S_R21, offsetof(struct pt_regs, UCreg_21)); - DEFINE(S_R22, offsetof(struct pt_regs, UCreg_22)); - DEFINE(S_R23, offsetof(struct pt_regs, UCreg_23)); - DEFINE(S_R24, offsetof(struct pt_regs, UCreg_24)); - DEFINE(S_R25, offsetof(struct pt_regs, UCreg_25)); - DEFINE(S_R26, offsetof(struct pt_regs, UCreg_26)); - DEFINE(S_FP, offsetof(struct pt_regs, UCreg_fp)); - DEFINE(S_IP, offsetof(struct pt_regs, UCreg_ip)); - DEFINE(S_SP, offsetof(struct pt_regs, UCreg_sp)); - DEFINE(S_LR, offsetof(struct pt_regs, UCreg_lr)); - DEFINE(S_PC, offsetof(struct pt_regs, UCreg_pc)); - DEFINE(S_PSR, offsetof(struct pt_regs, UCreg_asr)); - DEFINE(S_OLD_R0, offsetof(struct pt_regs, UCreg_ORIG_00)); - DEFINE(S_FRAME_SIZE, sizeof(struct pt_regs)); - BLANK(); - DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm)); - DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags)); - BLANK(); - DEFINE(VM_EXEC, VM_EXEC); - BLANK(); - DEFINE(PAGE_SZ, PAGE_SIZE); - BLANK(); - DEFINE(SYS_ERROR0, 0x9f0000); - BLANK(); - DEFINE(PBE_ADDRESS, offsetof(struct pbe, address)); - DEFINE(PBE_ORIN_ADDRESS, offsetof(struct pbe, orig_address)); - DEFINE(PBE_NEXT, offsetof(struct pbe, next)); - DEFINE(SWSUSP_CPU, offsetof(struct swsusp_arch_regs, \ - cpu_context)); -#ifdef CONFIG_UNICORE_FPU_F64 - DEFINE(SWSUSP_FPSTATE, offsetof(struct swsusp_arch_regs, \ - fpstate)); -#endif - BLANK(); - DEFINE(DMA_BIDIRECTIONAL, DMA_BIDIRECTIONAL); - DEFINE(DMA_TO_DEVICE, DMA_TO_DEVICE); - DEFINE(DMA_FROM_DEVICE, DMA_FROM_DEVICE); - return 0; -} diff --git a/arch/unicore32/kernel/clock.c b/arch/unicore32/kernel/clock.c deleted file mode 100644 index 41df6be0a3b2..000000000000 --- a/arch/unicore32/kernel/clock.c +++ /dev/null @@ -1,387 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/clock.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> - * Copyright (C) 2001-2010 Guan Xuetao - */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/device.h> -#include <linux/list.h> -#include <linux/errno.h> -#include <linux/err.h> -#include <linux/string.h> -#include <linux/clk.h> -#include <linux/mutex.h> -#include <linux/delay.h> -#include <linux/io.h> - -#include <mach/hardware.h> - -/* - * Very simple clock implementation - */ -struct clk { - struct list_head node; - unsigned long rate; - const char *name; -}; - -static struct clk clk_ost_clk = { - .name = "OST_CLK", - .rate = CLOCK_TICK_RATE, -}; - -static struct clk clk_mclk_clk = { - .name = "MAIN_CLK", -}; - -static struct clk clk_bclk32_clk = { - .name = "BUS32_CLK", -}; - -static struct clk clk_ddr_clk = { - .name = "DDR_CLK", -}; - -static struct clk clk_vga_clk = { - .name = "VGA_CLK", -}; - -static LIST_HEAD(clocks); -static DEFINE_MUTEX(clocks_mutex); - -struct clk *clk_get(struct device *dev, const char *id) -{ - struct clk *p, *clk = ERR_PTR(-ENOENT); - - mutex_lock(&clocks_mutex); - list_for_each_entry(p, &clocks, node) { - if (strcmp(id, p->name) == 0) { - clk = p; - break; - } - } - mutex_unlock(&clocks_mutex); - - return clk; -} -EXPORT_SYMBOL(clk_get); - -void clk_put(struct clk *clk) -{ -} -EXPORT_SYMBOL(clk_put); - -int clk_enable(struct clk *clk) -{ - return 0; -} -EXPORT_SYMBOL(clk_enable); - -void clk_disable(struct clk *clk) -{ -} -EXPORT_SYMBOL(clk_disable); - -unsigned long clk_get_rate(struct clk *clk) -{ - return clk->rate; -} -EXPORT_SYMBOL(clk_get_rate); - -struct { - unsigned long rate; - unsigned long cfg; - unsigned long div; -} vga_clk_table[] = { - {.rate = 25175000, .cfg = 0x00002001, .div = 0x9}, - {.rate = 31500000, .cfg = 0x00002001, .div = 0x7}, - {.rate = 40000000, .cfg = 0x00003801, .div = 0x9}, - {.rate = 49500000, .cfg = 0x00003801, .div = 0x7}, - {.rate = 65000000, .cfg = 0x00002c01, .div = 0x4}, - {.rate = 78750000, .cfg = 0x00002400, .div = 0x7}, - {.rate = 108000000, .cfg = 0x00002c01, .div = 0x2}, - {.rate = 106500000, .cfg = 0x00003c01, .div = 0x3}, - {.rate = 50650000, .cfg = 0x00106400, .div = 0x9}, - {.rate = 61500000, .cfg = 0x00106400, .div = 0xa}, - {.rate = 85500000, .cfg = 0x00002800, .div = 0x6}, -}; - -struct { - unsigned long mrate; - unsigned long prate; -} mclk_clk_table[] = { - {.mrate = 500000000, .prate = 0x00109801}, - {.mrate = 525000000, .prate = 0x00104C00}, - {.mrate = 550000000, .prate = 0x00105000}, - {.mrate = 575000000, .prate = 0x00105400}, - {.mrate = 600000000, .prate = 0x00105800}, - {.mrate = 625000000, .prate = 0x00105C00}, - {.mrate = 650000000, .prate = 0x00106000}, - {.mrate = 675000000, .prate = 0x00106400}, - {.mrate = 700000000, .prate = 0x00106800}, - {.mrate = 725000000, .prate = 0x00106C00}, - {.mrate = 750000000, .prate = 0x00107000}, - {.mrate = 775000000, .prate = 0x00107400}, - {.mrate = 800000000, .prate = 0x00107800}, -}; - -int clk_set_rate(struct clk *clk, unsigned long rate) -{ - if (clk == &clk_vga_clk) { - unsigned long pll_vgacfg, pll_vgadiv; - int ret, i; - - /* lookup vga_clk_table */ - ret = -EINVAL; - for (i = 0; i < ARRAY_SIZE(vga_clk_table); i++) { - if (rate == vga_clk_table[i].rate) { - pll_vgacfg = vga_clk_table[i].cfg; - pll_vgadiv = vga_clk_table[i].div; - ret = 0; - break; - } - } - - if (ret) - return ret; - - if (readl(PM_PLLVGACFG) == pll_vgacfg) - return 0; - - /* set pll vga cfg reg. */ - writel(pll_vgacfg, PM_PLLVGACFG); - - writel(PM_PMCR_CFBVGA, PM_PMCR); - while ((readl(PM_PLLDFCDONE) & PM_PLLDFCDONE_VGADFC) - != PM_PLLDFCDONE_VGADFC) - udelay(100); /* about 1ms */ - - /* set div cfg reg. */ - writel(readl(PM_PCGR) | PM_PCGR_VGACLK, PM_PCGR); - - writel((readl(PM_DIVCFG) & ~PM_DIVCFG_VGACLK_MASK) - | PM_DIVCFG_VGACLK(pll_vgadiv), PM_DIVCFG); - - writel(readl(PM_SWRESET) | PM_SWRESET_VGADIV, PM_SWRESET); - while ((readl(PM_SWRESET) & PM_SWRESET_VGADIV) - == PM_SWRESET_VGADIV) - udelay(100); /* 65536 bclk32, about 320us */ - - writel(readl(PM_PCGR) & ~PM_PCGR_VGACLK, PM_PCGR); - } -#ifdef CONFIG_CPU_FREQ - if (clk == &clk_mclk_clk) { - u32 pll_rate, divstatus = readl(PM_DIVSTATUS); - int ret, i; - - /* lookup mclk_clk_table */ - ret = -EINVAL; - for (i = 0; i < ARRAY_SIZE(mclk_clk_table); i++) { - if (rate == mclk_clk_table[i].mrate) { - pll_rate = mclk_clk_table[i].prate; - clk_mclk_clk.rate = mclk_clk_table[i].mrate; - ret = 0; - break; - } - } - - if (ret) - return ret; - - if (clk_mclk_clk.rate) - clk_bclk32_clk.rate = clk_mclk_clk.rate - / (((divstatus & 0x0000f000) >> 12) + 1); - - /* set pll sys cfg reg. */ - writel(pll_rate, PM_PLLSYSCFG); - - writel(PM_PMCR_CFBSYS, PM_PMCR); - while ((readl(PM_PLLDFCDONE) & PM_PLLDFCDONE_SYSDFC) - != PM_PLLDFCDONE_SYSDFC) - udelay(100); - /* about 1ms */ - } -#endif - return 0; -} -EXPORT_SYMBOL(clk_set_rate); - -int clk_register(struct clk *clk) -{ - mutex_lock(&clocks_mutex); - list_add(&clk->node, &clocks); - mutex_unlock(&clocks_mutex); - printk(KERN_DEFAULT "PKUnity PM: %s %lu.%02luM\n", clk->name, - (clk->rate)/1000000, (clk->rate)/10000 % 100); - return 0; -} -EXPORT_SYMBOL(clk_register); - -void clk_unregister(struct clk *clk) -{ - mutex_lock(&clocks_mutex); - list_del(&clk->node); - mutex_unlock(&clocks_mutex); -} -EXPORT_SYMBOL(clk_unregister); - -struct { - unsigned long prate; - unsigned long rate; -} pllrate_table[] = { - {.prate = 0x00002001, .rate = 250000000}, - {.prate = 0x00104801, .rate = 250000000}, - {.prate = 0x00104C01, .rate = 262500000}, - {.prate = 0x00002401, .rate = 275000000}, - {.prate = 0x00105001, .rate = 275000000}, - {.prate = 0x00105401, .rate = 287500000}, - {.prate = 0x00002801, .rate = 300000000}, - {.prate = 0x00105801, .rate = 300000000}, - {.prate = 0x00105C01, .rate = 312500000}, - {.prate = 0x00002C01, .rate = 325000000}, - {.prate = 0x00106001, .rate = 325000000}, - {.prate = 0x00106401, .rate = 337500000}, - {.prate = 0x00003001, .rate = 350000000}, - {.prate = 0x00106801, .rate = 350000000}, - {.prate = 0x00106C01, .rate = 362500000}, - {.prate = 0x00003401, .rate = 375000000}, - {.prate = 0x00107001, .rate = 375000000}, - {.prate = 0x00107401, .rate = 387500000}, - {.prate = 0x00003801, .rate = 400000000}, - {.prate = 0x00107801, .rate = 400000000}, - {.prate = 0x00107C01, .rate = 412500000}, - {.prate = 0x00003C01, .rate = 425000000}, - {.prate = 0x00108001, .rate = 425000000}, - {.prate = 0x00108401, .rate = 437500000}, - {.prate = 0x00004001, .rate = 450000000}, - {.prate = 0x00108801, .rate = 450000000}, - {.prate = 0x00108C01, .rate = 462500000}, - {.prate = 0x00004401, .rate = 475000000}, - {.prate = 0x00109001, .rate = 475000000}, - {.prate = 0x00109401, .rate = 487500000}, - {.prate = 0x00004801, .rate = 500000000}, - {.prate = 0x00109801, .rate = 500000000}, - {.prate = 0x00104C00, .rate = 525000000}, - {.prate = 0x00002400, .rate = 550000000}, - {.prate = 0x00105000, .rate = 550000000}, - {.prate = 0x00105400, .rate = 575000000}, - {.prate = 0x00002800, .rate = 600000000}, - {.prate = 0x00105800, .rate = 600000000}, - {.prate = 0x00105C00, .rate = 625000000}, - {.prate = 0x00002C00, .rate = 650000000}, - {.prate = 0x00106000, .rate = 650000000}, - {.prate = 0x00106400, .rate = 675000000}, - {.prate = 0x00003000, .rate = 700000000}, - {.prate = 0x00106800, .rate = 700000000}, - {.prate = 0x00106C00, .rate = 725000000}, - {.prate = 0x00003400, .rate = 750000000}, - {.prate = 0x00107000, .rate = 750000000}, - {.prate = 0x00107400, .rate = 775000000}, - {.prate = 0x00003800, .rate = 800000000}, - {.prate = 0x00107800, .rate = 800000000}, - {.prate = 0x00107C00, .rate = 825000000}, - {.prate = 0x00003C00, .rate = 850000000}, - {.prate = 0x00108000, .rate = 850000000}, - {.prate = 0x00108400, .rate = 875000000}, - {.prate = 0x00004000, .rate = 900000000}, - {.prate = 0x00108800, .rate = 900000000}, - {.prate = 0x00108C00, .rate = 925000000}, - {.prate = 0x00004400, .rate = 950000000}, - {.prate = 0x00109000, .rate = 950000000}, - {.prate = 0x00109400, .rate = 975000000}, - {.prate = 0x00004800, .rate = 1000000000}, - {.prate = 0x00109800, .rate = 1000000000}, -}; - -struct { - unsigned long prate; - unsigned long drate; -} pddr_table[] = { - {.prate = 0x00100800, .drate = 44236800}, - {.prate = 0x00100C00, .drate = 66355200}, - {.prate = 0x00101000, .drate = 88473600}, - {.prate = 0x00101400, .drate = 110592000}, - {.prate = 0x00101800, .drate = 132710400}, - {.prate = 0x00101C01, .drate = 154828800}, - {.prate = 0x00102001, .drate = 176947200}, - {.prate = 0x00102401, .drate = 199065600}, - {.prate = 0x00102801, .drate = 221184000}, - {.prate = 0x00102C01, .drate = 243302400}, - {.prate = 0x00103001, .drate = 265420800}, - {.prate = 0x00103401, .drate = 287539200}, - {.prate = 0x00103801, .drate = 309657600}, - {.prate = 0x00103C01, .drate = 331776000}, - {.prate = 0x00104001, .drate = 353894400}, -}; - -static int __init clk_init(void) -{ -#ifdef CONFIG_PUV3_PM - u32 pllrate, divstatus = readl(PM_DIVSTATUS); - u32 pcgr_val = readl(PM_PCGR); - int i; - - pcgr_val |= PM_PCGR_BCLKMME | PM_PCGR_BCLKH264E | PM_PCGR_BCLKH264D - | PM_PCGR_HECLK | PM_PCGR_HDCLK; - writel(pcgr_val, PM_PCGR); - - pllrate = readl(PM_PLLSYSSTATUS); - - /* lookup pmclk_table */ - clk_mclk_clk.rate = 0; - for (i = 0; i < ARRAY_SIZE(pllrate_table); i++) { - if (pllrate == pllrate_table[i].prate) { - clk_mclk_clk.rate = pllrate_table[i].rate; - break; - } - } - - if (clk_mclk_clk.rate) - clk_bclk32_clk.rate = clk_mclk_clk.rate / - (((divstatus & 0x0000f000) >> 12) + 1); - - pllrate = readl(PM_PLLDDRSTATUS); - - /* lookup pddr_table */ - clk_ddr_clk.rate = 0; - for (i = 0; i < ARRAY_SIZE(pddr_table); i++) { - if (pllrate == pddr_table[i].prate) { - clk_ddr_clk.rate = pddr_table[i].drate; - break; - } - } - - pllrate = readl(PM_PLLVGASTATUS); - - /* lookup pvga_table */ - clk_vga_clk.rate = 0; - for (i = 0; i < ARRAY_SIZE(pllrate_table); i++) { - if (pllrate == pllrate_table[i].prate) { - clk_vga_clk.rate = pllrate_table[i].rate; - break; - } - } - - if (clk_vga_clk.rate) - clk_vga_clk.rate = clk_vga_clk.rate / - (((divstatus & 0x00f00000) >> 20) + 1); - - clk_register(&clk_vga_clk); -#endif -#ifdef CONFIG_ARCH_FPGA - clk_ddr_clk.rate = 33000000; - clk_mclk_clk.rate = 33000000; - clk_bclk32_clk.rate = 33000000; -#endif - clk_register(&clk_ddr_clk); - clk_register(&clk_mclk_clk); - clk_register(&clk_bclk32_clk); - clk_register(&clk_ost_clk); - return 0; -} -core_initcall(clk_init); diff --git a/arch/unicore32/kernel/debug-macro.S b/arch/unicore32/kernel/debug-macro.S deleted file mode 100644 index 7e2da0de4f71..000000000000 --- a/arch/unicore32/kernel/debug-macro.S +++ /dev/null @@ -1,86 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/unicore32/kernel/debug-macro.S - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - * - * Debugging macro include header - */ -#include <generated/asm-offsets.h> -#include <mach/hardware.h> - - .macro put_word_ocd, rd, rx=r16 -1001: movc \rx, p1.c0, #0 - cand.a \rx, #2 - bne 1001b - movc p1.c1, \rd, #1 - .endm - -#ifdef CONFIG_DEBUG_OCD - /* debug using UniCore On-Chip-Debugger */ - .macro addruart, rx - .endm - - .macro senduart, rd, rx - put_word_ocd \rd, \rx - .endm - - .macro busyuart, rd, rx - .endm - - .macro waituart, rd, rx - .endm -#else -#define UART_CLK_DEFAULT 3686400 * 20 - /* Uartclk = MCLK/ 2, The MCLK on my board is 3686400 * 40 */ -#define BAUD_RATE_DEFAULT 115200 - /* The baud rate of the serial port */ - -#define UART_DIVISOR_DEFAULT (UART_CLK_DEFAULT \ - / (16 * BAUD_RATE_DEFAULT) - 1) - - .macro addruart,rx - mrc p0, #0, \rx, c1, c0 - tst \rx, #1 @ MMU enabled? - moveq \rx, #0xee000000 @ physical base address - movne \rx, #0x6e000000 @ virtual address - - @ We probe for the active serial port here - @ However, now we assume UART0 is active: epip4d - @ We assume r1 and r2 can be clobbered. - - movl r2, #UART_DIVISOR_DEFAULT - mov r1, #0x80 - str r1, [\rx, #UART_LCR_OFFSET] - and r1, r2, #0xff00 - mov r1, r1, lsr #8 - str r1, [\rx, #UART_DLH_OFFSET] - and r1, r2, #0xff - str r1, [\rx, #UART_DLL_OFFSET] - mov r1, #0x7 - str r1, [\rx, #UART_FCR_OFFSET] - mov r1, #0x3 - str r1, [\rx, #UART_LCR_OFFSET] - mov r1, #0x0 - str r1, [\rx, #UART_IER_OFFSET] - .endm - - .macro senduart,rd,rx - str \rd, [\rx, #UART_THR_OFFSET] - .endm - - .macro waituart,rd,rx -1001: ldr \rd, [\rx, #UART_LSR_OFFSET] - tst \rd, #UART_LSR_THRE - beq 1001b - .endm - - .macro busyuart,rd,rx -1001: ldr \rd, [\rx, #UART_LSR_OFFSET] - tst \rd, #UART_LSR_TEMT - bne 1001b - .endm -#endif - diff --git a/arch/unicore32/kernel/debug.S b/arch/unicore32/kernel/debug.S deleted file mode 100644 index 13bc8c8550e4..000000000000 --- a/arch/unicore32/kernel/debug.S +++ /dev/null @@ -1,82 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/unicore32/kernel/debug.S - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - * - * 32-bit debugging code - */ -#include <linux/linkage.h> -#include <asm/assembler.h> - - .text - -/* - * Some debugging routines (useful if you've got MM problems and - * printk isn't working). For DEBUGGING ONLY!!! Do not leave - * references to these in a production kernel! - */ -#include "debug-macro.S" - -/* - * Useful debugging routines - */ -ENTRY(printhex8) - mov r1, #8 - b printhex -ENDPROC(printhex8) - -ENTRY(printhex4) - mov r1, #4 - b printhex -ENDPROC(printhex4) - -ENTRY(printhex2) - mov r1, #2 -printhex: adr r2, hexbuf - add r3, r2, r1 - mov r1, #0 - stb r1, [r3] -1: and r1, r0, #15 - mov r0, r0 >> #4 - csub.a r1, #10 - beg 2f - add r1, r1, #'0' - 'a' + 10 -2: add r1, r1, #'a' - 10 - stb.w r1, [r3+], #-1 - cxor.a r3, r2 - bne 1b - mov r0, r2 - b printascii -ENDPROC(printhex2) - - .ltorg - -ENTRY(printascii) - addruart r3 - b 2f -1: waituart r2, r3 - senduart r1, r3 - busyuart r2, r3 - cxor.a r1, #'\n' - cmoveq r1, #'\r' - beq 1b -2: cxor.a r0, #0 - beq 3f - ldb.w r1, [r0]+, #1 - cxor.a r1, #0 - bne 1b -3: mov pc, lr -ENDPROC(printascii) - -ENTRY(printch) - addruart r3 - mov r1, r0 - mov r0, #0 - b 1b -ENDPROC(printch) - -hexbuf: .space 16 - diff --git a/arch/unicore32/kernel/dma.c b/arch/unicore32/kernel/dma.c deleted file mode 100644 index 7a0e2d4d6077..000000000000 --- a/arch/unicore32/kernel/dma.c +++ /dev/null @@ -1,179 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/dma.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> - * Copyright (C) 2001-2010 Guan Xuetao - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/interrupt.h> -#include <linux/errno.h> -#include <linux/io.h> - -#include <asm/irq.h> -#include <mach/hardware.h> -#include <mach/dma.h> - -struct dma_channel { - char *name; - puv3_dma_prio prio; - void (*irq_handler)(int, void *); - void (*err_handler)(int, void *); - void *data; -}; - -static struct dma_channel dma_channels[MAX_DMA_CHANNELS]; - -int puv3_request_dma(char *name, puv3_dma_prio prio, - void (*irq_handler)(int, void *), - void (*err_handler)(int, void *), - void *data) -{ - unsigned long flags; - int i, found = 0; - - /* basic sanity checks */ - if (!name) - return -EINVAL; - - local_irq_save(flags); - - do { - /* try grabbing a DMA channel with the requested priority */ - for (i = 0; i < MAX_DMA_CHANNELS; i++) { - if ((dma_channels[i].prio == prio) && - !dma_channels[i].name) { - found = 1; - break; - } - } - /* if requested prio group is full, try a hier priority */ - } while (!found && prio--); - - if (found) { - dma_channels[i].name = name; - dma_channels[i].irq_handler = irq_handler; - dma_channels[i].err_handler = err_handler; - dma_channels[i].data = data; - } else { - printk(KERN_WARNING "No more available DMA channels for %s\n", - name); - i = -ENODEV; - } - - local_irq_restore(flags); - return i; -} -EXPORT_SYMBOL(puv3_request_dma); - -void puv3_free_dma(int dma_ch) -{ - unsigned long flags; - - if (!dma_channels[dma_ch].name) { - printk(KERN_CRIT - "%s: trying to free channel %d which is already freed\n", - __func__, dma_ch); - return; - } - - local_irq_save(flags); - dma_channels[dma_ch].name = NULL; - dma_channels[dma_ch].err_handler = NULL; - local_irq_restore(flags); -} -EXPORT_SYMBOL(puv3_free_dma); - -static irqreturn_t dma_irq_handler(int irq, void *dev_id) -{ - int i, dint; - - dint = readl(DMAC_ITCSR); - for (i = 0; i < MAX_DMA_CHANNELS; i++) { - if (dint & DMAC_CHANNEL(i)) { - struct dma_channel *channel = &dma_channels[i]; - - /* Clear TC interrupt of channel i */ - writel(DMAC_CHANNEL(i), DMAC_ITCCR); - writel(0, DMAC_ITCCR); - - if (channel->name && channel->irq_handler) { - channel->irq_handler(i, channel->data); - } else { - /* - * IRQ for an unregistered DMA channel: - * let's clear the interrupts and disable it. - */ - printk(KERN_WARNING "spurious IRQ for" - " DMA channel %d\n", i); - } - } - } - return IRQ_HANDLED; -} - -static irqreturn_t dma_err_handler(int irq, void *dev_id) -{ - int i, dint; - - dint = readl(DMAC_IESR); - for (i = 0; i < MAX_DMA_CHANNELS; i++) { - if (dint & DMAC_CHANNEL(i)) { - struct dma_channel *channel = &dma_channels[i]; - - /* Clear Err interrupt of channel i */ - writel(DMAC_CHANNEL(i), DMAC_IECR); - writel(0, DMAC_IECR); - - if (channel->name && channel->err_handler) { - channel->err_handler(i, channel->data); - } else { - /* - * IRQ for an unregistered DMA channel: - * let's clear the interrupts and disable it. - */ - printk(KERN_WARNING "spurious IRQ for" - " DMA channel %d\n", i); - } - } - } - return IRQ_HANDLED; -} - -int __init puv3_init_dma(void) -{ - int i, ret; - - /* dma channel priorities on v8 processors: - * ch 0 - 1 <--> (0) DMA_PRIO_HIGH - * ch 2 - 3 <--> (1) DMA_PRIO_MEDIUM - * ch 4 - 5 <--> (2) DMA_PRIO_LOW - */ - for (i = 0; i < MAX_DMA_CHANNELS; i++) { - puv3_stop_dma(i); - dma_channels[i].name = NULL; - dma_channels[i].prio = min((i & 0x7) >> 1, DMA_PRIO_LOW); - } - - ret = request_irq(IRQ_DMA, dma_irq_handler, 0, "DMA", NULL); - if (ret) { - printk(KERN_CRIT "Can't register IRQ for DMA\n"); - return ret; - } - - ret = request_irq(IRQ_DMAERR, dma_err_handler, 0, "DMAERR", NULL); - if (ret) { - printk(KERN_CRIT "Can't register IRQ for DMAERR\n"); - free_irq(IRQ_DMA, "DMA"); - return ret; - } - - return 0; -} - -postcore_initcall(puv3_init_dma); diff --git a/arch/unicore32/kernel/early_printk.c b/arch/unicore32/kernel/early_printk.c deleted file mode 100644 index c00b6712b8f7..000000000000 --- a/arch/unicore32/kernel/early_printk.c +++ /dev/null @@ -1,46 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/early_printk.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/console.h> -#include <linux/init.h> -#include <linux/string.h> -#include <mach/ocd.h> - -/* On-Chip-Debugger functions */ - -static void early_ocd_write(struct console *con, const char *s, unsigned n) -{ - while (*s && n-- > 0) { - if (*s == '\n') - ocd_putc((int)'\r'); - ocd_putc((int)*s); - s++; - } -} - -static struct console early_ocd_console = { - .name = "earlyocd", - .write = early_ocd_write, - .flags = CON_PRINTBUFFER, - .index = -1, -}; - -static int __init setup_early_printk(char *buf) -{ - if (!buf || early_console) - return 0; - - early_console = &early_ocd_console; - if (strstr(buf, "keep")) - early_console->flags &= ~CON_BOOT; - else - early_console->flags |= CON_BOOT; - register_console(early_console); - return 0; -} -early_param("earlyprintk", setup_early_printk); diff --git a/arch/unicore32/kernel/elf.c b/arch/unicore32/kernel/elf.c deleted file mode 100644 index 22adc65a03e9..000000000000 --- a/arch/unicore32/kernel/elf.c +++ /dev/null @@ -1,35 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/elf.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/personality.h> -#include <linux/binfmts.h> -#include <linux/elf.h> - -int elf_check_arch(const struct elf32_hdr *x) -{ - /* Make sure it's an UniCore executable */ - if (x->e_machine != EM_UNICORE) - return 0; - - /* Make sure the entry address is reasonable */ - if (x->e_entry & 3) - return 0; - - return 1; -} -EXPORT_SYMBOL(elf_check_arch); - -void elf_set_personality(const struct elf32_hdr *x) -{ - unsigned int personality = PER_LINUX; - - set_personality(personality); -} -EXPORT_SYMBOL(elf_set_personality); diff --git a/arch/unicore32/kernel/entry.S b/arch/unicore32/kernel/entry.S deleted file mode 100644 index b35dc83069cb..000000000000 --- a/arch/unicore32/kernel/entry.S +++ /dev/null @@ -1,802 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/unicore32/kernel/entry.S - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - * - * Low-level vector interface routines - */ -#include <linux/init.h> -#include <linux/linkage.h> -#include <asm/assembler.h> -#include <asm/errno.h> -#include <asm/thread_info.h> -#include <asm/memory.h> -#include <asm/unistd.h> -#include <generated/asm-offsets.h> -#include "debug-macro.S" - -@ -@ Most of the stack format comes from struct pt_regs, but with -@ the addition of 8 bytes for storing syscall args 5 and 6. -@ -#define S_OFF 8 - -/* - * The SWI code relies on the fact that R0 is at the bottom of the stack - * (due to slow/fast restore user regs). - */ -#if S_R0 != 0 -#error "Please fix" -#endif - - .macro zero_fp -#ifdef CONFIG_FRAME_POINTER - mov fp, #0 -#endif - .endm - - .macro alignment_trap, rtemp -#ifdef CONFIG_ALIGNMENT_TRAP - ldw \rtemp, .LCcralign - ldw \rtemp, [\rtemp] - movc p0.c1, \rtemp, #0 -#endif - .endm - - .macro load_user_sp_lr, rd, rtemp, offset = 0 - mov \rtemp, asr - xor \rtemp, \rtemp, #(PRIV_MODE ^ SUSR_MODE) - mov.a asr, \rtemp @ switch to the SUSR mode - - ldw sp, [\rd+], #\offset @ load sp_user - ldw lr, [\rd+], #\offset + 4 @ load lr_user - - xor \rtemp, \rtemp, #(PRIV_MODE ^ SUSR_MODE) - mov.a asr, \rtemp @ switch back to the PRIV mode - .endm - - .macro priv_exit, rpsr - mov.a bsr, \rpsr - ldm.w (r0 - r15), [sp]+ - ldm.b (r16 - pc), [sp]+ @ load r0 - pc, asr - .endm - - .macro restore_user_regs, fast = 0, offset = 0 - ldw r1, [sp+], #\offset + S_PSR @ get calling asr - ldw lr, [sp+], #\offset + S_PC @ get pc - mov.a bsr, r1 @ save in bsr_priv - .if \fast - add sp, sp, #\offset + S_R1 @ r0 is syscall return value - ldm.w (r1 - r15), [sp]+ @ get calling r1 - r15 - ldur (r16 - lr), [sp]+ @ get calling r16 - lr - .else - ldm.w (r0 - r15), [sp]+ @ get calling r0 - r15 - ldur (r16 - lr), [sp]+ @ get calling r16 - lr - .endif - nop - add sp, sp, #S_FRAME_SIZE - S_R16 - mov.a pc, lr @ return - @ and move bsr_priv into asr - .endm - - .macro get_thread_info, rd - mov \rd, sp >> #13 - mov \rd, \rd << #13 - .endm - - .macro get_irqnr_and_base, irqnr, irqstat, base, tmp - ldw \base, =(PKUNITY_INTC_BASE) - ldw \irqstat, [\base+], #0xC @ INTC_ICIP - ldw \tmp, [\base+], #0x4 @ INTC_ICMR - and.a \irqstat, \irqstat, \tmp - beq 1001f - cntlz \irqnr, \irqstat - rsub \irqnr, \irqnr, #31 -1001: /* EQ will be set if no irqs pending */ - .endm - -#ifdef CONFIG_DEBUG_LL - .macro printreg, reg, temp - adr \temp, 901f - stm (r0-r3), [\temp]+ - stw lr, [\temp+], #0x10 - mov r0, \reg - b.l printhex8 - mov r0, #':' - b.l printch - mov r0, pc - b.l printhex8 - adr r0, 902f - b.l printascii - adr \temp, 901f - ldm (r0-r3), [\temp]+ - ldw lr, [\temp+], #0x10 - b 903f -901: .word 0, 0, 0, 0, 0 @ r0-r3, lr -902: .asciz ": epip4d\n" - .align -903: - .endm -#endif - -/* - * These are the registers used in the syscall handler, and allow us to - * have in theory up to 7 arguments to a function - r0 to r6. - * - * Note that tbl == why is intentional. - * - * We must set at least "tsk" and "why" when calling ret_with_reschedule. - */ -scno .req r21 @ syscall number -tbl .req r22 @ syscall table pointer -why .req r22 @ Linux syscall (!= 0) -tsk .req r23 @ current thread_info - -/* - * Interrupt handling. Preserves r17, r18, r19 - */ - .macro intr_handler -1: get_irqnr_and_base r0, r6, r5, lr - beq 2f - mov r1, sp - @ - @ routine called with r0 = irq number, r1 = struct pt_regs * - @ - adr lr, 1b - b asm_do_IRQ -2: - .endm - -/* - * PRIV mode handlers - */ - .macro priv_entry - sub sp, sp, #(S_FRAME_SIZE - 4) - stm (r1 - r15), [sp]+ - add r5, sp, #S_R15 - stm (r16 - r28), [r5]+ - - ldm (r1 - r3), [r0]+ - add r5, sp, #S_SP - 4 @ here for interlock avoidance - mov r4, #-1 @ "" "" "" "" - add r0, sp, #(S_FRAME_SIZE - 4) - stw.w r1, [sp+], #-4 @ save the "real" r0 copied - @ from the exception stack - - mov r1, lr - - @ - @ We are now ready to fill in the remaining blanks on the stack: - @ - @ r0 - sp_priv - @ r1 - lr_priv - @ r2 - lr_<exception>, already fixed up for correct return/restart - @ r3 - bsr_<exception> - @ r4 - orig_r0 (see pt_regs definition in ptrace.h) - @ - stm (r0 - r4), [r5]+ - .endm - -/* - * User mode handlers - * - */ - .macro user_entry - sub sp, sp, #S_FRAME_SIZE - stm (r1 - r15), [sp+] - add r4, sp, #S_R16 - stm (r16 - r28), [r4]+ - - ldm (r1 - r3), [r0]+ - add r0, sp, #S_PC @ here for interlock avoidance - mov r4, #-1 @ "" "" "" "" - - stw r1, [sp] @ save the "real" r0 copied - @ from the exception stack - - @ - @ We are now ready to fill in the remaining blanks on the stack: - @ - @ r2 - lr_<exception>, already fixed up for correct return/restart - @ r3 - bsr_<exception> - @ r4 - orig_r0 (see pt_regs definition in ptrace.h) - @ - @ Also, separately save sp_user and lr_user - @ - stm (r2 - r4), [r0]+ - stur (sp, lr), [r0-] - - @ - @ Enable the alignment trap while in kernel mode - @ - alignment_trap r0 - - @ - @ Clear FP to mark the first stack frame - @ - zero_fp - .endm - - .text - -@ -@ __invalid - generic code for failed exception -@ (re-entrant version of handlers) -@ -__invalid: - sub sp, sp, #S_FRAME_SIZE - stm (r1 - r15), [sp+] - add r1, sp, #S_R16 - stm (r16 - r28, sp, lr), [r1]+ - - zero_fp - - ldm (r4 - r6), [r0]+ - add r0, sp, #S_PC @ here for interlock avoidance - mov r7, #-1 @ "" "" "" "" - stw r4, [sp] @ save preserved r0 - stm (r5 - r7), [r0]+ @ lr_<exception>, - @ asr_<exception>, "old_r0" - - mov r0, sp - mov r1, asr - b bad_mode -ENDPROC(__invalid) - - .align 5 -__dabt_priv: - priv_entry - - @ - @ get ready to re-enable interrupts if appropriate - @ - mov r17, asr - cand.a r3, #PSR_I_BIT - bne 1f - andn r17, r17, #PSR_I_BIT -1: - - @ - @ Call the processor-specific abort handler: - @ - @ r2 - aborted context pc - @ r3 - aborted context asr - @ - @ The abort handler must return the aborted address in r0, and - @ the fault status register in r1. - @ - movc r1, p0.c3, #0 @ get FSR - movc r0, p0.c4, #0 @ get FAR - - @ - @ set desired INTR state, then call main handler - @ - mov.a asr, r17 - mov r2, sp - b.l do_DataAbort - - @ - @ INTRs off again before pulling preserved data off the stack - @ - disable_irq r0 - - @ - @ restore BSR and restart the instruction - @ - ldw r2, [sp+], #S_PSR - priv_exit r2 @ return from exception -ENDPROC(__dabt_priv) - - .align 5 -__intr_priv: - priv_entry - - intr_handler - - mov r0, #0 @ epip4d - movc p0.c5, r0, #14 - nop; nop; nop; nop; nop; nop; nop; nop - - ldw r4, [sp+], #S_PSR @ irqs are already disabled - - priv_exit r4 @ return from exception -ENDPROC(__intr_priv) - - .ltorg - - .align 5 -__extn_priv: - priv_entry - - mov r0, sp @ struct pt_regs *regs - mov r1, asr - b bad_mode @ not supported -ENDPROC(__extn_priv) - - .align 5 -__pabt_priv: - priv_entry - - @ - @ re-enable interrupts if appropriate - @ - mov r17, asr - cand.a r3, #PSR_I_BIT - bne 1f - andn r17, r17, #PSR_I_BIT -1: - - @ - @ set args, then call main handler - @ - @ r0 - address of faulting instruction - @ r1 - pointer to registers on stack - @ - mov r0, r2 @ pass address of aborted instruction - mov r1, #5 - mov.a asr, r17 - mov r2, sp @ regs - b.l do_PrefetchAbort @ call abort handler - - @ - @ INTRs off again before pulling preserved data off the stack - @ - disable_irq r0 - - @ - @ restore BSR and restart the instruction - @ - ldw r2, [sp+], #S_PSR - priv_exit r2 @ return from exception -ENDPROC(__pabt_priv) - - .align 5 -.LCcralign: - .word cr_alignment - - .align 5 -__dabt_user: - user_entry - -#ifdef CONFIG_UNICORE_FPU_F64 - cff ip, s31 - cand.a ip, #0x08000000 @ FPU execption traps? - beq 209f - - ldw ip, [sp+], #S_PC - add ip, ip, #4 - stw ip, [sp+], #S_PC - @ - @ fall through to the emulation code, which returns using r19 if - @ it has emulated the instruction, or the more conventional lr - @ if we are to treat this as a real extended instruction - @ - @ r0 - instruction - @ -1: ldw.u r0, [r2] - adr r19, ret_from_exception - adr lr, 209f - @ - @ fallthrough to call do_uc_f64 - @ -/* - * Check whether the instruction is a co-processor instruction. - * If yes, we need to call the relevant co-processor handler. - * - * Note that we don't do a full check here for the co-processor - * instructions; all instructions with bit 27 set are well - * defined. The only instructions that should fault are the - * co-processor instructions. - * - * Emulators may wish to make use of the following registers: - * r0 = instruction opcode. - * r2 = PC - * r19 = normal "successful" return address - * r20 = this threads thread_info structure. - * lr = unrecognised instruction return address - */ - get_thread_info r20 @ get current thread - and r8, r0, #0x00003c00 @ mask out CP number - mov r7, #1 - stb r7, [r20+], #TI_USED_CP + 2 @ set appropriate used_cp[] - - @ F64 hardware support entry point. - @ r0 = faulted instruction - @ r19 = return address - @ r20 = fp_state - enable_irq r4 - add r20, r20, #TI_FPSTATE @ r20 = workspace - cff r1, s31 @ get fpu FPSCR - andn r2, r1, #0x08000000 - ctf r2, s31 @ clear 27 bit - mov r2, sp @ nothing stacked - regdump is at TOS - mov lr, r19 @ setup for a return to the user code - - @ Now call the C code to package up the bounce to the support code - @ r0 holds the trigger instruction - @ r1 holds the FPSCR value - @ r2 pointer to register dump - b ucf64_exchandler -209: -#endif - @ - @ Call the processor-specific abort handler: - @ - @ r2 - aborted context pc - @ r3 - aborted context asr - @ - @ The abort handler must return the aborted address in r0, and - @ the fault status register in r1. - @ - movc r1, p0.c3, #0 @ get FSR - movc r0, p0.c4, #0 @ get FAR - - @ - @ INTRs on, then call the main handler - @ - enable_irq r2 - mov r2, sp - adr lr, ret_from_exception - b do_DataAbort -ENDPROC(__dabt_user) - - .align 5 -__intr_user: - user_entry - - get_thread_info tsk - - intr_handler - - mov why, #0 - b ret_to_user -ENDPROC(__intr_user) - - .ltorg - - .align 5 -__extn_user: - user_entry - - mov r0, sp - mov r1, asr - b bad_mode -ENDPROC(__extn_user) - - .align 5 -__pabt_user: - user_entry - - mov r0, r2 @ pass address of aborted instruction. - mov r1, #5 - enable_irq r1 @ Enable interrupts - mov r2, sp @ regs - b.l do_PrefetchAbort @ call abort handler - /* fall through */ -/* - * This is the return code to user mode for abort handlers - */ -ENTRY(ret_from_exception) - get_thread_info tsk - mov why, #0 - b ret_to_user -ENDPROC(__pabt_user) -ENDPROC(ret_from_exception) - -/* - * Register switch for UniCore V2 processors - * r0 = previous task_struct, r1 = previous thread_info, r2 = next thread_info - * previous and next are guaranteed not to be the same. - */ -ENTRY(__switch_to) - add ip, r1, #TI_CPU_SAVE - stm.w (r4 - r15), [ip]+ - stm.w (r16 - r27, sp, lr), [ip]+ - -#ifdef CONFIG_UNICORE_FPU_F64 - add ip, r1, #TI_FPSTATE - sfm.w (f0 - f7 ), [ip]+ - sfm.w (f8 - f15), [ip]+ - sfm.w (f16 - f23), [ip]+ - sfm.w (f24 - f31), [ip]+ - cff r4, s31 - stw r4, [ip] - - add ip, r2, #TI_FPSTATE - lfm.w (f0 - f7 ), [ip]+ - lfm.w (f8 - f15), [ip]+ - lfm.w (f16 - f23), [ip]+ - lfm.w (f24 - f31), [ip]+ - ldw r4, [ip] - ctf r4, s31 -#endif - add ip, r2, #TI_CPU_SAVE - ldm.w (r4 - r15), [ip]+ - ldm (r16 - r27, sp, pc), [ip]+ @ Load all regs saved previously -ENDPROC(__switch_to) - - .align 5 -/* - * This is the fast syscall return path. We do as little as - * possible here, and this includes saving r0 back into the PRIV - * stack. - */ -ret_fast_syscall: - disable_irq r1 @ disable interrupts - ldw r1, [tsk+], #TI_FLAGS - cand.a r1, #_TIF_WORK_MASK - bne fast_work_pending - - @ fast_restore_user_regs - restore_user_regs fast = 1, offset = S_OFF - -/* - * Ok, we need to do extra processing, enter the slow path. - */ -fast_work_pending: - stw.w r0, [sp+], #S_R0+S_OFF @ returned r0 -work_pending: - cand.a r1, #_TIF_NEED_RESCHED - bne work_resched - mov r0, sp @ 'regs' - mov r2, why @ 'syscall' - cand.a r1, #_TIF_SIGPENDING @ delivering a signal? - cmovne why, #0 @ prevent further restarts - b.l do_notify_resume - b ret_slow_syscall @ Check work again - -work_resched: - b.l schedule -/* - * "slow" syscall return path. "why" tells us if this was a real syscall. - */ -ENTRY(ret_to_user) -ret_slow_syscall: - disable_irq r1 @ disable interrupts - get_thread_info tsk @ epip4d, one path error?! - ldw r1, [tsk+], #TI_FLAGS - cand.a r1, #_TIF_WORK_MASK - bne work_pending -no_work_pending: - @ slow_restore_user_regs - restore_user_regs fast = 0, offset = 0 -ENDPROC(ret_to_user) - -/* - * This is how we return from a fork. - */ -ENTRY(ret_from_fork) - b.l schedule_tail - b ret_slow_syscall -ENDPROC(ret_from_fork) - -ENTRY(ret_from_kernel_thread) - b.l schedule_tail - mov r0, r5 - adr lr, ret_slow_syscall - mov pc, r4 -ENDPROC(ret_from_kernel_thread) - -/*============================================================================= - * SWI handler - *----------------------------------------------------------------------------- - */ - .align 5 -ENTRY(vector_swi) - sub sp, sp, #S_FRAME_SIZE - stm (r0 - r15), [sp]+ @ Calling r0 - r15 - add r8, sp, #S_R16 - stm (r16 - r28), [r8]+ @ Calling r16 - r28 - add r8, sp, #S_PC - stur (sp, lr), [r8-] @ Calling sp, lr - mov r8, bsr @ called from non-REAL mode - stw lr, [sp+], #S_PC @ Save calling PC - stw r8, [sp+], #S_PSR @ Save ASR - stw r0, [sp+], #S_OLD_R0 @ Save OLD_R0 - zero_fp - - /* - * Get the system call number. - */ - sub ip, lr, #4 - ldw.u scno, [ip] @ get SWI instruction - -#ifdef CONFIG_ALIGNMENT_TRAP - ldw ip, __cr_alignment - ldw ip, [ip] - movc p0.c1, ip, #0 @ update control register -#endif - enable_irq ip - - get_thread_info tsk - ldw tbl, =sys_call_table @ load syscall table pointer - - andn scno, scno, #0xff000000 @ mask off SWI op-code - andn scno, scno, #0x00ff0000 @ mask off SWI op-code - - stm.w (r4, r5), [sp-] @ push fifth and sixth args - ldw ip, [tsk+], #TI_FLAGS @ check for syscall tracing - cand.a ip, #_TIF_SYSCALL_TRACE @ are we tracing syscalls? - bne __sys_trace - - csub.a scno, #__NR_syscalls @ check upper syscall limit - adr lr, ret_fast_syscall @ return address - bea 1f - ldw pc, [tbl+], scno << #2 @ call sys_* routine -1: - add r1, sp, #S_OFF -2: mov why, #0 @ no longer a real syscall - b sys_ni_syscall @ not private func - - /* - * This is the really slow path. We're going to be doing - * context switches, and waiting for our parent to respond. - */ -__sys_trace: - mov r2, scno - add r1, sp, #S_OFF - mov r0, #0 @ trace entry [IP = 0] - b.l syscall_trace - - adr lr, __sys_trace_return @ return address - mov scno, r0 @ syscall number (possibly new) - add r1, sp, #S_R0 + S_OFF @ pointer to regs - csub.a scno, #__NR_syscalls @ check upper syscall limit - bea 2b - ldm (r0 - r3), [r1]+ @ have to reload r0 - r3 - ldw pc, [tbl+], scno << #2 @ call sys_* routine - -__sys_trace_return: - stw.w r0, [sp+], #S_R0 + S_OFF @ save returned r0 - mov r2, scno - mov r1, sp - mov r0, #1 @ trace exit [IP = 1] - b.l syscall_trace - b ret_slow_syscall - - .align 5 -#ifdef CONFIG_ALIGNMENT_TRAP - .type __cr_alignment, #object -__cr_alignment: - .word cr_alignment -#endif - .ltorg - -ENTRY(sys_rt_sigreturn) - add r0, sp, #S_OFF - mov why, #0 @ prevent syscall restart handling - b __sys_rt_sigreturn -ENDPROC(sys_rt_sigreturn) - - __INIT - -/* - * Vector stubs. - * - * This code is copied to 0xffff0200 so we can use branches in the - * vectors, rather than ldr's. Note that this code must not - * exceed 0x300 bytes. - * - * Common stub entry macro: - * Enter in INTR mode, bsr = PRIV/USER ASR, lr = PRIV/USER PC - * - * SP points to a minimal amount of processor-private memory, the address - * of which is copied into r0 for the mode specific abort handler. - */ - .macro vector_stub, name, mode - .align 5 - -vector_\name: - @ - @ Save r0, lr_<exception> (parent PC) and bsr_<exception> - @ (parent ASR) - @ - stw r0, [sp] - stw lr, [sp+], #4 @ save r0, lr - mov lr, bsr - stw lr, [sp+], #8 @ save bsr - - @ - @ Prepare for PRIV mode. INTRs remain disabled. - @ - mov r0, asr - xor r0, r0, #(\mode ^ PRIV_MODE) - mov.a bsr, r0 - - @ - @ the branch table must immediately follow this code - @ - and lr, lr, #0x03 - add lr, lr, #1 - mov r0, sp - ldw lr, [pc+], lr << #2 - mov.a pc, lr @ branch to handler in PRIV mode -ENDPROC(vector_\name) - .align 2 - @ handler addresses follow this label - .endm - - .globl __stubs_start -__stubs_start: -/* - * Interrupt dispatcher - */ - vector_stub intr, INTR_MODE - - .long __intr_user @ 0 (USER) - .long __invalid @ 1 - .long __invalid @ 2 - .long __intr_priv @ 3 (PRIV) - -/* - * Data abort dispatcher - * Enter in ABT mode, bsr = USER ASR, lr = USER PC - */ - vector_stub dabt, ABRT_MODE - - .long __dabt_user @ 0 (USER) - .long __invalid @ 1 - .long __invalid @ 2 (INTR) - .long __dabt_priv @ 3 (PRIV) - -/* - * Prefetch abort dispatcher - * Enter in ABT mode, bsr = USER ASR, lr = USER PC - */ - vector_stub pabt, ABRT_MODE - - .long __pabt_user @ 0 (USER) - .long __invalid @ 1 - .long __invalid @ 2 (INTR) - .long __pabt_priv @ 3 (PRIV) - -/* - * Undef instr entry dispatcher - * Enter in EXTN mode, bsr = PRIV/USER ASR, lr = PRIV/USER PC - */ - vector_stub extn, EXTN_MODE - - .long __extn_user @ 0 (USER) - .long __invalid @ 1 - .long __invalid @ 2 (INTR) - .long __extn_priv @ 3 (PRIV) - -/* - * We group all the following data together to optimise - * for CPUs with separate I & D caches. - */ - .align 5 - -.LCvswi: - .word vector_swi - - .globl __stubs_end -__stubs_end: - - .equ stubs_offset, __vectors_start + 0x200 - __stubs_start - - .globl __vectors_start -__vectors_start: - jepriv SYS_ERROR0 - b vector_extn + stubs_offset - ldw pc, .LCvswi + stubs_offset - b vector_pabt + stubs_offset - b vector_dabt + stubs_offset - jepriv SYS_ERROR0 - b vector_intr + stubs_offset - jepriv SYS_ERROR0 - - .globl __vectors_end -__vectors_end: - - .data - - .globl cr_alignment - .globl cr_no_alignment -cr_alignment: - .space 4 -cr_no_alignment: - .space 4 diff --git a/arch/unicore32/kernel/fpu-ucf64.c b/arch/unicore32/kernel/fpu-ucf64.c deleted file mode 100644 index 85f0af29d29b..000000000000 --- a/arch/unicore32/kernel/fpu-ucf64.c +++ /dev/null @@ -1,117 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/fpu-ucf64.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/module.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/signal.h> -#include <linux/sched/signal.h> -#include <linux/init.h> - -#include <asm/fpu-ucf64.h> - -/* - * A special flag to tell the normalisation code not to normalise. - */ -#define F64_NAN_FLAG 0x100 - -/* - * A bit pattern used to indicate the initial (unset) value of the - * exception mask, in case nothing handles an instruction. This - * doesn't include the NAN flag, which get masked out before - * we check for an error. - */ -#define F64_EXCEPTION_ERROR ((u32)-1 & ~F64_NAN_FLAG) - -/* - * Since we aren't building with -mfpu=f64, we need to code - * these instructions using their MRC/MCR equivalents. - */ -#define f64reg(_f64_) #_f64_ - -#define cff(_f64_) ({ \ - u32 __v; \ - asm("cff %0, " f64reg(_f64_) "@ fmrx %0, " #_f64_ \ - : "=r" (__v) : : "cc"); \ - __v; \ - }) - -#define ctf(_f64_, _var_) \ - asm("ctf %0, " f64reg(_f64_) "@ fmxr " #_f64_ ", %0" \ - : : "r" (_var_) : "cc") - -/* - * Raise a SIGFPE for the current process. - * sicode describes the signal being raised. - */ -void ucf64_raise_sigfpe(struct pt_regs *regs) -{ - /* - * This is the same as NWFPE, because it's not clear what - * this is used for - */ - current->thread.error_code = 0; - current->thread.trap_no = 6; - - send_sig_fault(SIGFPE, FPE_FLTUNK, - (void __user *)(instruction_pointer(regs) - 4), - current); -} - -/* - * Handle exceptions of UniCore-F64. - */ -void ucf64_exchandler(u32 inst, u32 fpexc, struct pt_regs *regs) -{ - u32 tmp = fpexc; - u32 exc = F64_EXCEPTION_ERROR & fpexc; - - pr_debug("UniCore-F64: instruction %08x fpscr %08x\n", - inst, fpexc); - - if (exc & FPSCR_CMPINSTR_BIT) { - if (exc & FPSCR_CON) - tmp |= FPSCR_CON; - else - tmp &= ~(FPSCR_CON); - exc &= ~(FPSCR_CMPINSTR_BIT | FPSCR_CON); - } else { - pr_debug("UniCore-F64 Error: unhandled exceptions\n"); - pr_debug("UniCore-F64 FPSCR 0x%08x INST 0x%08x\n", - cff(FPSCR), inst); - - ucf64_raise_sigfpe(regs); - return; - } - - /* - * Update the FPSCR with the additional exception flags. - * Comparison instructions always return at least one of - * these flags set. - */ - tmp &= ~(FPSCR_TRAP | FPSCR_IOS | FPSCR_OFS | FPSCR_UFS | - FPSCR_IXS | FPSCR_HIS | FPSCR_IOC | FPSCR_OFC | - FPSCR_UFC | FPSCR_IXC | FPSCR_HIC); - - tmp |= exc; - ctf(FPSCR, tmp); -} - -/* - * F64 support code initialisation. - */ -static int __init ucf64_init(void) -{ - ctf(FPSCR, 0x0); /* FPSCR_UFE | FPSCR_NDE perhaps better */ - - printk(KERN_INFO "Enable UniCore-F64 support.\n"); - - return 0; -} - -late_initcall(ucf64_init); diff --git a/arch/unicore32/kernel/gpio.c b/arch/unicore32/kernel/gpio.c deleted file mode 100644 index 36d395b54b7c..000000000000 --- a/arch/unicore32/kernel/gpio.c +++ /dev/null @@ -1,121 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/gpio.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> - * Copyright (C) 2001-2010 Guan Xuetao - */ -/* in FPGA, no GPIO support */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/gpio/driver.h> -/* FIXME: needed for gpio_set_value() - convert to use descriptors or hogs */ -#include <linux/gpio.h> -#include <mach/hardware.h> - -#ifdef CONFIG_LEDS -#include <linux/leds.h> -#include <linux/platform_device.h> - -static const struct gpio_led puv3_gpio_leds[] = { - { .name = "cpuhealth", .gpio = GPO_CPU_HEALTH, .active_low = 0, - .default_trigger = "heartbeat", }, - { .name = "hdd_led", .gpio = GPO_HDD_LED, .active_low = 1, - .default_trigger = "disk-activity", }, -}; - -static const struct gpio_led_platform_data puv3_gpio_led_data = { - .num_leds = ARRAY_SIZE(puv3_gpio_leds), - .leds = (void *) puv3_gpio_leds, -}; - -static struct platform_device puv3_gpio_gpio_leds = { - .name = "leds-gpio", - .id = -1, - .dev = { - .platform_data = (void *) &puv3_gpio_led_data, - } -}; - -static int __init puv3_gpio_leds_init(void) -{ - platform_device_register(&puv3_gpio_gpio_leds); - return 0; -} - -device_initcall(puv3_gpio_leds_init); -#endif - -static int puv3_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - return !!(readl(GPIO_GPLR) & GPIO_GPIO(offset)); -} - -static void puv3_gpio_set(struct gpio_chip *chip, unsigned offset, int value) -{ - if (value) - writel(GPIO_GPIO(offset), GPIO_GPSR); - else - writel(GPIO_GPIO(offset), GPIO_GPCR); -} - -static int puv3_direction_input(struct gpio_chip *chip, unsigned offset) -{ - unsigned long flags; - - local_irq_save(flags); - writel(readl(GPIO_GPDR) & ~GPIO_GPIO(offset), GPIO_GPDR); - local_irq_restore(flags); - return 0; -} - -static int puv3_direction_output(struct gpio_chip *chip, unsigned offset, - int value) -{ - unsigned long flags; - - local_irq_save(flags); - puv3_gpio_set(chip, offset, value); - writel(readl(GPIO_GPDR) | GPIO_GPIO(offset), GPIO_GPDR); - local_irq_restore(flags); - return 0; -} - -static struct gpio_chip puv3_gpio_chip = { - .label = "gpio", - .direction_input = puv3_direction_input, - .direction_output = puv3_direction_output, - .set = puv3_gpio_set, - .get = puv3_gpio_get, - .base = 0, - .ngpio = GPIO_MAX + 1, -}; - -void __init puv3_init_gpio(void) -{ - writel(GPIO_DIR, GPIO_GPDR); -#if defined(CONFIG_PUV3_NB0916) || defined(CONFIG_PUV3_SMW0919) \ - || defined(CONFIG_PUV3_DB0913) - gpio_set_value(GPO_WIFI_EN, 1); - gpio_set_value(GPO_HDD_LED, 1); - gpio_set_value(GPO_VGA_EN, 1); - gpio_set_value(GPO_LCD_EN, 1); - gpio_set_value(GPO_CAM_PWR_EN, 0); - gpio_set_value(GPO_LCD_VCC_EN, 1); - gpio_set_value(GPO_SOFT_OFF, 1); - gpio_set_value(GPO_BT_EN, 1); - gpio_set_value(GPO_FAN_ON, 0); - gpio_set_value(GPO_SPKR, 0); - gpio_set_value(GPO_CPU_HEALTH, 1); - gpio_set_value(GPO_LAN_SEL, 1); -/* - * DO NOT modify the GPO_SET_V1 and GPO_SET_V2 in kernel - * gpio_set_value(GPO_SET_V1, 1); - * gpio_set_value(GPO_SET_V2, 1); - */ -#endif - gpiochip_add_data(&puv3_gpio_chip, NULL); -} diff --git a/arch/unicore32/kernel/head.S b/arch/unicore32/kernel/head.S deleted file mode 100644 index 9bbb8668f9f7..000000000000 --- a/arch/unicore32/kernel/head.S +++ /dev/null @@ -1,249 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/unicore32/kernel/head.S - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/linkage.h> -#include <linux/init.h> - -#include <asm/assembler.h> -#include <asm/ptrace.h> -#include <generated/asm-offsets.h> -#include <asm/memory.h> -#include <asm/thread_info.h> -#include <asm/hwdef-copro.h> -#include <asm/pgtable-hwdef.h> - -#if (PHYS_OFFSET & 0x003fffff) -#error "PHYS_OFFSET must be at an even 4MiB boundary!" -#endif - -#define KERNEL_RAM_VADDR (PAGE_OFFSET + KERNEL_IMAGE_START) -#define KERNEL_RAM_PADDR (PHYS_OFFSET + KERNEL_IMAGE_START) - -#define KERNEL_PGD_PADDR (KERNEL_RAM_PADDR - 0x1000) -#define KERNEL_PGD_VADDR (KERNEL_RAM_VADDR - 0x1000) - -#define KERNEL_START KERNEL_RAM_VADDR -#define KERNEL_END _end - -/* - * swapper_pg_dir is the virtual address of the initial page table. - * We place the page tables 4K below KERNEL_RAM_VADDR. Therefore, we must - * make sure that KERNEL_RAM_VADDR is correctly set. Currently, we expect - * the least significant 16 bits to be 0x8000, but we could probably - * relax this restriction to KERNEL_RAM_VADDR >= PAGE_OFFSET + 0x1000. - */ -#if (KERNEL_RAM_VADDR & 0xffff) != 0x8000 -#error KERNEL_RAM_VADDR must start at 0xXXXX8000 -#endif - - .globl swapper_pg_dir - .equ swapper_pg_dir, KERNEL_RAM_VADDR - 0x1000 - -/* - * Kernel startup entry point. - * --------------------------- - * - * This is normally called from the decompressor code. The requirements - * are: MMU = off, D-cache = off, I-cache = dont care - * - * This code is mostly position independent, so if you link the kernel at - * 0xc0008000, you call this at __pa(0xc0008000). - */ - __HEAD -ENTRY(stext) - @ set asr - mov r0, #PRIV_MODE @ ensure priv mode - or r0, #PSR_R_BIT | PSR_I_BIT @ disable irqs - mov.a asr, r0 - - @ process identify - movc r0, p0.c0, #0 @ cpuid - movl r1, 0xff00ffff @ mask - movl r2, 0x4d000863 @ value - and r0, r1, r0 - cxor.a r0, r2 - bne __error_p @ invalid processor id - - /* - * Clear the 4K level 1 swapper page table - */ - movl r0, #KERNEL_PGD_PADDR @ page table address - mov r1, #0 - add r2, r0, #0x1000 -101: stw.w r1, [r0]+, #4 - stw.w r1, [r0]+, #4 - stw.w r1, [r0]+, #4 - stw.w r1, [r0]+, #4 - cxor.a r0, r2 - bne 101b - - movl r4, #KERNEL_PGD_PADDR @ page table address - mov r7, #PMD_TYPE_SECT | PMD_PRESENT @ page size: section - or r7, r7, #PMD_SECT_CACHEABLE @ cacheable - or r7, r7, #PMD_SECT_READ | PMD_SECT_WRITE | PMD_SECT_EXEC - - /* - * Create identity mapping for first 4MB of kernel to - * cater for the MMU enable. This identity mapping - * will be removed by paging_init(). We use our current program - * counter to determine corresponding section base address. - */ - mov r6, pc - mov r6, r6 >> #22 @ start of kernel section - or r1, r7, r6 << #22 @ flags + kernel base - stw r1, [r4+], r6 << #2 @ identity mapping - - /* - * Now setup the pagetables for our kernel direct - * mapped region. - */ - add r0, r4, #(KERNEL_START & 0xff000000) >> 20 - stw.w r1, [r0+], #(KERNEL_START & 0x00c00000) >> 20 - movl r6, #(KERNEL_END - 1) - add r0, r0, #4 - add r6, r4, r6 >> #20 -102: csub.a r0, r6 - add r1, r1, #1 << 22 - bua 103f - stw.w r1, [r0]+, #4 - b 102b -103: - /* - * Then map first 4MB of ram in case it contains our boot params. - */ - add r0, r4, #PAGE_OFFSET >> 20 - or r6, r7, #(PHYS_OFFSET & 0xffc00000) - stw r6, [r0] - - ldw r15, __switch_data @ address to jump to after - - /* - * Initialise TLB, Caches, and MMU state ready to switch the MMU - * on. - */ - mov r0, #0 - movc p0.c5, r0, #28 @ cache invalidate all - nop8 - movc p0.c6, r0, #6 @ TLB invalidate all - nop8 - - /* - * ..V. .... ..TB IDAM - * ..1. .... ..01 1111 - */ - movl r0, #0x201f @ control register setting - - /* - * Setup common bits before finally enabling the MMU. Essentially - * this is just loading the page table pointer and domain access - * registers. - */ - #ifndef CONFIG_ALIGNMENT_TRAP - andn r0, r0, #CR_A - #endif - #ifdef CONFIG_CPU_DCACHE_DISABLE - andn r0, r0, #CR_D - #endif - #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH - andn r0, r0, #CR_B - #endif - #ifdef CONFIG_CPU_ICACHE_DISABLE - andn r0, r0, #CR_I - #endif - - movc p0.c2, r4, #0 @ set pgd - b __turn_mmu_on -ENDPROC(stext) - -/* - * Enable the MMU. This completely changes the structure of the visible - * memory space. You will not be able to trace execution through this. - * - * r0 = cp#0 control register - * r15 = *virtual* address to jump to upon completion - */ - .align 5 -__turn_mmu_on: - mov r0, r0 - movc p0.c1, r0, #0 @ write control reg - nop @ fetch inst by phys addr - mov pc, r15 - nop8 @ fetch inst by phys addr -ENDPROC(__turn_mmu_on) - -/* - * Setup the initial page tables. We only setup the barest - * amount which are required to get the kernel running, which - * generally means mapping in the kernel code. - * - * r9 = cpuid - * r10 = procinfo - * - * Returns: - * r0, r3, r6, r7 corrupted - * r4 = physical page table address - */ - .ltorg - - .align 2 - .type __switch_data, %object -__switch_data: - .long __mmap_switched - .long __bss_start @ r6 - .long _end @ r7 - .long cr_alignment @ r8 - .long init_thread_union + THREAD_START_SP @ sp - -/* - * The following fragment of code is executed with the MMU on in MMU mode, - * and uses absolute addresses; this is not position independent. - * - * r0 = cp#0 control register - */ -__mmap_switched: - adr r3, __switch_data + 4 - - ldm.w (r6, r7, r8), [r3]+ - ldw sp, [r3] - - mov fp, #0 @ Clear BSS (and zero fp) -203: csub.a r6, r7 - bea 204f - stw.w fp, [r6]+,#4 - b 203b -204: - andn r1, r0, #CR_A @ Clear 'A' bit - stm (r0, r1), [r8]+ @ Save control register values - b start_kernel -ENDPROC(__mmap_switched) - -/* - * Exception handling. Something went wrong and we can't proceed. We - * ought to tell the user, but since we don't have any guarantee that - * we're even running on the right architecture, we do virtually nothing. - * - * If CONFIG_DEBUG_LL is set we try to print out something about the error - * and hope for the best (useful if bootloader fails to pass a proper - * machine ID for example). - */ -__error_p: -#ifdef CONFIG_DEBUG_LL - adr r0, str_p1 - b.l printascii - mov r0, r9 - b.l printhex8 - adr r0, str_p2 - b.l printascii -901: nop8 - b 901b -str_p1: .asciz "\nError: unrecognized processor variant (0x" -str_p2: .asciz ").\n" - .align -#endif -ENDPROC(__error_p) - diff --git a/arch/unicore32/kernel/hibernate.c b/arch/unicore32/kernel/hibernate.c deleted file mode 100644 index 4cdf3c846a2d..000000000000 --- a/arch/unicore32/kernel/hibernate.c +++ /dev/null @@ -1,159 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/hibernate.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> - * Copyright (C) 2001-2010 Guan Xuetao - */ - -#include <linux/gfp.h> -#include <linux/suspend.h> -#include <linux/memblock.h> -#include <linux/pgtable.h> - -#include <asm/page.h> -#include <asm/pgalloc.h> -#include <asm/sections.h> -#include <asm/suspend.h> - -#include "mach/pm.h" - -/* Pointer to the temporary resume page tables */ -pgd_t *resume_pg_dir; - -struct swsusp_arch_regs swsusp_arch_regs_cpu0; - -/* - * Create a middle page table on a resume-safe page and put a pointer to it in - * the given global directory entry. This only returns the gd entry - * in non-PAE compilation mode, since the middle layer is folded. - */ -static pmd_t *resume_one_md_table_init(pgd_t *pgd) -{ - pud_t *pud; - p4d_t *p4d; - pmd_t *pmd_table; - - p4d = p4d_offset(pgd, 0); - pud = pud_offset(p4d, 0); - pmd_table = pmd_offset(pud, 0); - - return pmd_table; -} - -/* - * Create a page table on a resume-safe page and place a pointer to it in - * a middle page directory entry. - */ -static pte_t *resume_one_page_table_init(pmd_t *pmd) -{ - if (pmd_none(*pmd)) { - pte_t *page_table = (pte_t *)get_safe_page(GFP_ATOMIC); - if (!page_table) - return NULL; - - set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_KERNEL_TABLE)); - - BUG_ON(page_table != pte_offset_kernel(pmd, 0)); - - return page_table; - } - - return pte_offset_kernel(pmd, 0); -} - -/* - * This maps the physical memory to kernel virtual address space, a total - * of max_low_pfn pages, by creating page tables starting from address - * PAGE_OFFSET. The page tables are allocated out of resume-safe pages. - */ -static int resume_physical_mapping_init(pgd_t *pgd_base) -{ - unsigned long pfn; - pgd_t *pgd; - pmd_t *pmd; - pte_t *pte; - int pgd_idx, pmd_idx; - - pgd_idx = pgd_index(PAGE_OFFSET); - pgd = pgd_base + pgd_idx; - pfn = 0; - - for (; pgd_idx < PTRS_PER_PGD; pgd++, pgd_idx++) { - pmd = resume_one_md_table_init(pgd); - if (!pmd) - return -ENOMEM; - - if (pfn >= max_low_pfn) - continue; - - for (pmd_idx = 0; pmd_idx < PTRS_PER_PMD; pmd++, pmd_idx++) { - pte_t *max_pte; - - if (pfn >= max_low_pfn) - break; - - /* Map with normal page tables. - * NOTE: We can mark everything as executable here - */ - pte = resume_one_page_table_init(pmd); - if (!pte) - return -ENOMEM; - - max_pte = pte + PTRS_PER_PTE; - for (; pte < max_pte; pte++, pfn++) { - if (pfn >= max_low_pfn) - break; - - set_pte(pte, pfn_pte(pfn, PAGE_KERNEL_EXEC)); - } - } - } - - return 0; -} - -static inline void resume_init_first_level_page_table(pgd_t *pg_dir) -{ -} - -int swsusp_arch_resume(void) -{ - int error; - - resume_pg_dir = (pgd_t *)get_safe_page(GFP_ATOMIC); - if (!resume_pg_dir) - return -ENOMEM; - - resume_init_first_level_page_table(resume_pg_dir); - error = resume_physical_mapping_init(resume_pg_dir); - if (error) - return error; - - /* We have got enough memory and from now on we cannot recover */ - restore_image(resume_pg_dir, restore_pblist); - return 0; -} - -/* - * pfn_is_nosave - check if given pfn is in the 'nosave' section - */ - -int pfn_is_nosave(unsigned long pfn) -{ - unsigned long begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT; - unsigned long end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT; - - return (pfn >= begin_pfn) && (pfn < end_pfn); -} - -void save_processor_state(void) -{ -} - -void restore_processor_state(void) -{ - local_flush_tlb_all(); -} diff --git a/arch/unicore32/kernel/hibernate_asm.S b/arch/unicore32/kernel/hibernate_asm.S deleted file mode 100644 index a589bc189e24..000000000000 --- a/arch/unicore32/kernel/hibernate_asm.S +++ /dev/null @@ -1,114 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/unicore32/kernel/hibernate_asm.S - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> - * Copyright (C) 2001-2010 Guan Xuetao - */ - -#include <linux/sys.h> -#include <linux/errno.h> -#include <linux/linkage.h> -#include <linux/pgtable.h> -#include <generated/asm-offsets.h> -#include <asm/page.h> -#include <asm/assembler.h> - -@ restore_image(pgd_t *resume_pg_dir, struct pbe *restore_pblist) -@ r0: resume_pg_dir -@ r1: restore_pblist -@ copy restore_pblist pages -@ restore registers from swsusp_arch_regs_cpu0 -@ -ENTRY(restore_image) - sub r0, r0, #PAGE_OFFSET - mov r5, #0 - movc p0.c6, r5, #6 @invalidate ITLB & DTLB - movc p0.c2, r0, #0 - nop - nop - nop - nop - nop - nop - nop - - .p2align 4,,7 -101: - csub.a r1, #0 - beq 109f - - ldw r6, [r1+], #PBE_ADDRESS - ldw r7, [r1+], #PBE_ORIN_ADDRESS - - movl ip, #128 -102: ldm.w (r8 - r15), [r6]+ - stm.w (r8 - r15), [r7]+ - sub.a ip, ip, #1 - bne 102b - - ldw r1, [r1+], #PBE_NEXT - b 101b - - .p2align 4,,7 -109: - /* go back to the original page tables */ - ldw r0, =swapper_pg_dir - sub r0, r0, #PAGE_OFFSET - mov r5, #0 - movc p0.c6, r5, #6 - movc p0.c2, r0, #0 - nop - nop - nop - nop - nop - nop - nop - -#ifdef CONFIG_UNICORE_FPU_F64 - ldw ip, 1f - add ip, ip, #SWSUSP_FPSTATE - lfm.w (f0 - f7 ), [ip]+ - lfm.w (f8 - f15), [ip]+ - lfm.w (f16 - f23), [ip]+ - lfm.w (f24 - f31), [ip]+ - ldw r4, [ip] - ctf r4, s31 -#endif - mov r0, #0x0 - ldw ip, 1f - add ip, ip, #SWSUSP_CPU - ldm.w (r4 - r15), [ip]+ - ldm (r16 - r27, sp, pc), [ip]+ @ Load all regs saved previously - - .align 2 -1: .long swsusp_arch_regs_cpu0 - - -@ swsusp_arch_suspend() -@ - prepare pc for resume, return from function without swsusp_save on resume -@ - save registers in swsusp_arch_regs_cpu0 -@ - call swsusp_save write suspend image - -ENTRY(swsusp_arch_suspend) - ldw ip, 1f - add ip, ip, #SWSUSP_CPU - stm.w (r4 - r15), [ip]+ - stm.w (r16 - r27, sp, lr), [ip]+ - -#ifdef CONFIG_UNICORE_FPU_F64 - ldw ip, 1f - add ip, ip, #SWSUSP_FPSTATE - sfm.w (f0 - f7 ), [ip]+ - sfm.w (f8 - f15), [ip]+ - sfm.w (f16 - f23), [ip]+ - sfm.w (f24 - f31), [ip]+ - cff r4, s31 - stw r4, [ip] -#endif - b swsusp_save @ no return - -1: .long swsusp_arch_regs_cpu0 diff --git a/arch/unicore32/kernel/irq.c b/arch/unicore32/kernel/irq.c deleted file mode 100644 index c014ae3c3e48..000000000000 --- a/arch/unicore32/kernel/irq.c +++ /dev/null @@ -1,371 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/irq.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/kernel_stat.h> -#include <linux/module.h> -#include <linux/signal.h> -#include <linux/ioport.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/random.h> -#include <linux/smp.h> -#include <linux/init.h> -#include <linux/seq_file.h> -#include <linux/errno.h> -#include <linux/list.h> -#include <linux/kallsyms.h> -#include <linux/proc_fs.h> -#include <linux/syscore_ops.h> - -#include <mach/hardware.h> - -#include "setup.h" - -/* - * PKUnity GPIO edge detection for IRQs: - * IRQs are generated on Falling-Edge, Rising-Edge, or both. - * Use this instead of directly setting GRER/GFER. - */ -static int GPIO_IRQ_rising_edge; -static int GPIO_IRQ_falling_edge; -static int GPIO_IRQ_mask = 0; - -#define GPIO_MASK(irq) (1 << (irq - IRQ_GPIO0)) - -static int puv3_gpio_type(struct irq_data *d, unsigned int type) -{ - unsigned int mask; - - if (d->irq < IRQ_GPIOHIGH) - mask = 1 << d->irq; - else - mask = GPIO_MASK(d->irq); - - if (type == IRQ_TYPE_PROBE) { - if ((GPIO_IRQ_rising_edge | GPIO_IRQ_falling_edge) & mask) - return 0; - type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING; - } - - if (type & IRQ_TYPE_EDGE_RISING) - GPIO_IRQ_rising_edge |= mask; - else - GPIO_IRQ_rising_edge &= ~mask; - if (type & IRQ_TYPE_EDGE_FALLING) - GPIO_IRQ_falling_edge |= mask; - else - GPIO_IRQ_falling_edge &= ~mask; - - writel(GPIO_IRQ_rising_edge & GPIO_IRQ_mask, GPIO_GRER); - writel(GPIO_IRQ_falling_edge & GPIO_IRQ_mask, GPIO_GFER); - - return 0; -} - -/* - * GPIO IRQs must be acknowledged. This is for IRQs from 0 to 7. - */ -static void puv3_low_gpio_ack(struct irq_data *d) -{ - writel((1 << d->irq), GPIO_GEDR); -} - -static void puv3_low_gpio_mask(struct irq_data *d) -{ - writel(readl(INTC_ICMR) & ~(1 << d->irq), INTC_ICMR); -} - -static void puv3_low_gpio_unmask(struct irq_data *d) -{ - writel(readl(INTC_ICMR) | (1 << d->irq), INTC_ICMR); -} - -static int puv3_low_gpio_wake(struct irq_data *d, unsigned int on) -{ - if (on) - writel(readl(PM_PWER) | (1 << d->irq), PM_PWER); - else - writel(readl(PM_PWER) & ~(1 << d->irq), PM_PWER); - return 0; -} - -static struct irq_chip puv3_low_gpio_chip = { - .name = "GPIO-low", - .irq_ack = puv3_low_gpio_ack, - .irq_mask = puv3_low_gpio_mask, - .irq_unmask = puv3_low_gpio_unmask, - .irq_set_type = puv3_gpio_type, - .irq_set_wake = puv3_low_gpio_wake, -}; - -/* - * IRQ8 (GPIO0 through 27) handler. We enter here with the - * irq_controller_lock held, and IRQs disabled. Decode the IRQ - * and call the handler. - */ -static void puv3_gpio_handler(struct irq_desc *desc) -{ - unsigned int mask, irq; - - mask = readl(GPIO_GEDR); - do { - /* - * clear down all currently active IRQ sources. - * We will be processing them all. - */ - writel(mask, GPIO_GEDR); - - irq = IRQ_GPIO0; - do { - if (mask & 1) - generic_handle_irq(irq); - mask >>= 1; - irq++; - } while (mask); - mask = readl(GPIO_GEDR); - } while (mask); -} - -/* - * GPIO0-27 edge IRQs need to be handled specially. - * In addition, the IRQs are all collected up into one bit in the - * interrupt controller registers. - */ -static void puv3_high_gpio_ack(struct irq_data *d) -{ - unsigned int mask = GPIO_MASK(d->irq); - - writel(mask, GPIO_GEDR); -} - -static void puv3_high_gpio_mask(struct irq_data *d) -{ - unsigned int mask = GPIO_MASK(d->irq); - - GPIO_IRQ_mask &= ~mask; - - writel(readl(GPIO_GRER) & ~mask, GPIO_GRER); - writel(readl(GPIO_GFER) & ~mask, GPIO_GFER); -} - -static void puv3_high_gpio_unmask(struct irq_data *d) -{ - unsigned int mask = GPIO_MASK(d->irq); - - GPIO_IRQ_mask |= mask; - - writel(GPIO_IRQ_rising_edge & GPIO_IRQ_mask, GPIO_GRER); - writel(GPIO_IRQ_falling_edge & GPIO_IRQ_mask, GPIO_GFER); -} - -static int puv3_high_gpio_wake(struct irq_data *d, unsigned int on) -{ - if (on) - writel(readl(PM_PWER) | PM_PWER_GPIOHIGH, PM_PWER); - else - writel(readl(PM_PWER) & ~PM_PWER_GPIOHIGH, PM_PWER); - return 0; -} - -static struct irq_chip puv3_high_gpio_chip = { - .name = "GPIO-high", - .irq_ack = puv3_high_gpio_ack, - .irq_mask = puv3_high_gpio_mask, - .irq_unmask = puv3_high_gpio_unmask, - .irq_set_type = puv3_gpio_type, - .irq_set_wake = puv3_high_gpio_wake, -}; - -/* - * We don't need to ACK IRQs on the PKUnity unless they're GPIOs - * this is for internal IRQs i.e. from 8 to 31. - */ -static void puv3_mask_irq(struct irq_data *d) -{ - writel(readl(INTC_ICMR) & ~(1 << d->irq), INTC_ICMR); -} - -static void puv3_unmask_irq(struct irq_data *d) -{ - writel(readl(INTC_ICMR) | (1 << d->irq), INTC_ICMR); -} - -/* - * Apart form GPIOs, only the RTC alarm can be a wakeup event. - */ -static int puv3_set_wake(struct irq_data *d, unsigned int on) -{ - if (d->irq == IRQ_RTCAlarm) { - if (on) - writel(readl(PM_PWER) | PM_PWER_RTC, PM_PWER); - else - writel(readl(PM_PWER) & ~PM_PWER_RTC, PM_PWER); - return 0; - } - return -EINVAL; -} - -static struct irq_chip puv3_normal_chip = { - .name = "PKUnity-v3", - .irq_ack = puv3_mask_irq, - .irq_mask = puv3_mask_irq, - .irq_unmask = puv3_unmask_irq, - .irq_set_wake = puv3_set_wake, -}; - -static struct resource irq_resource = { - .name = "irqs", - .start = io_v2p(PKUNITY_INTC_BASE), - .end = io_v2p(PKUNITY_INTC_BASE) + 0xFFFFF, -}; - -static struct puv3_irq_state { - unsigned int saved; - unsigned int icmr; - unsigned int iclr; - unsigned int iccr; -} puv3_irq_state; - -static int puv3_irq_suspend(void) -{ - struct puv3_irq_state *st = &puv3_irq_state; - - st->saved = 1; - st->icmr = readl(INTC_ICMR); - st->iclr = readl(INTC_ICLR); - st->iccr = readl(INTC_ICCR); - - /* - * Disable all GPIO-based interrupts. - */ - writel(readl(INTC_ICMR) & ~(0x1ff), INTC_ICMR); - - /* - * Set the appropriate edges for wakeup. - */ - writel(readl(PM_PWER) & GPIO_IRQ_rising_edge, GPIO_GRER); - writel(readl(PM_PWER) & GPIO_IRQ_falling_edge, GPIO_GFER); - - /* - * Clear any pending GPIO interrupts. - */ - writel(readl(GPIO_GEDR), GPIO_GEDR); - - return 0; -} - -static void puv3_irq_resume(void) -{ - struct puv3_irq_state *st = &puv3_irq_state; - - if (st->saved) { - writel(st->iccr, INTC_ICCR); - writel(st->iclr, INTC_ICLR); - - writel(GPIO_IRQ_rising_edge & GPIO_IRQ_mask, GPIO_GRER); - writel(GPIO_IRQ_falling_edge & GPIO_IRQ_mask, GPIO_GFER); - - writel(st->icmr, INTC_ICMR); - } -} - -static struct syscore_ops puv3_irq_syscore_ops = { - .suspend = puv3_irq_suspend, - .resume = puv3_irq_resume, -}; - -static int __init puv3_irq_init_syscore(void) -{ - register_syscore_ops(&puv3_irq_syscore_ops); - return 0; -} - -device_initcall(puv3_irq_init_syscore); - -void __init init_IRQ(void) -{ - unsigned int irq; - - request_resource(&iomem_resource, &irq_resource); - - /* disable all IRQs */ - writel(0, INTC_ICMR); - - /* all IRQs are IRQ, not REAL */ - writel(0, INTC_ICLR); - - /* clear all GPIO edge detects */ - writel(FMASK(8, 0) & ~FIELD(1, 1, GPI_SOFF_REQ), GPIO_GPIR); - writel(0, GPIO_GFER); - writel(0, GPIO_GRER); - writel(0x0FFFFFFF, GPIO_GEDR); - - writel(1, INTC_ICCR); - - for (irq = 0; irq < IRQ_GPIOHIGH; irq++) { - irq_set_chip(irq, &puv3_low_gpio_chip); - irq_set_handler(irq, handle_edge_irq); - irq_modify_status(irq, - IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN, - 0); - } - - for (irq = IRQ_GPIOHIGH + 1; irq < IRQ_GPIO0; irq++) { - irq_set_chip(irq, &puv3_normal_chip); - irq_set_handler(irq, handle_level_irq); - irq_modify_status(irq, - IRQ_NOREQUEST | IRQ_NOAUTOEN, - IRQ_NOPROBE); - } - - for (irq = IRQ_GPIO0; irq <= IRQ_GPIO27; irq++) { - irq_set_chip(irq, &puv3_high_gpio_chip); - irq_set_handler(irq, handle_edge_irq); - irq_modify_status(irq, - IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN, - 0); - } - - /* - * Install handler for GPIO 0-27 edge detect interrupts - */ - irq_set_chip(IRQ_GPIOHIGH, &puv3_normal_chip); - irq_set_chained_handler(IRQ_GPIOHIGH, puv3_gpio_handler); - -#ifdef CONFIG_PUV3_GPIO - puv3_init_gpio(); -#endif -} - -/* - * do_IRQ handles all hardware IRQ's. Decoded IRQs should not - * come via this function. Instead, they should provide their - * own 'handler' - */ -asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs) -{ - struct pt_regs *old_regs = set_irq_regs(regs); - - irq_enter(); - - /* - * Some hardware gives randomly wrong interrupts. Rather - * than crashing, do something sensible. - */ - if (unlikely(irq >= nr_irqs)) { - if (printk_ratelimit()) - printk(KERN_WARNING "Bad IRQ%u\n", irq); - ack_bad_irq(irq); - } else { - generic_handle_irq(irq); - } - - irq_exit(); - set_irq_regs(old_regs); -} - diff --git a/arch/unicore32/kernel/ksyms.c b/arch/unicore32/kernel/ksyms.c deleted file mode 100644 index 731445008932..000000000000 --- a/arch/unicore32/kernel/ksyms.c +++ /dev/null @@ -1,57 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/ksyms.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/string.h> -#include <linux/delay.h> -#include <linux/in6.h> -#include <linux/syscalls.h> -#include <linux/uaccess.h> -#include <linux/io.h> - -#include <asm/checksum.h> - -#include "ksyms.h" - -EXPORT_SYMBOL(find_first_bit); -EXPORT_SYMBOL(find_first_zero_bit); -EXPORT_SYMBOL(find_next_zero_bit); -EXPORT_SYMBOL(find_next_bit); - - /* platform dependent support */ -EXPORT_SYMBOL(__udelay); -EXPORT_SYMBOL(__const_udelay); - - /* string / mem functions */ -EXPORT_SYMBOL(strchr); -EXPORT_SYMBOL(strrchr); -EXPORT_SYMBOL(memset); -EXPORT_SYMBOL(memcpy); -EXPORT_SYMBOL(memmove); -EXPORT_SYMBOL(memchr); - - /* user mem (segment) */ -EXPORT_SYMBOL(__strnlen_user); -EXPORT_SYMBOL(__strncpy_from_user); - -EXPORT_SYMBOL(copy_page); - -EXPORT_SYMBOL(raw_copy_from_user); -EXPORT_SYMBOL(raw_copy_to_user); -EXPORT_SYMBOL(__clear_user); - -EXPORT_SYMBOL(__ashldi3); -EXPORT_SYMBOL(__ashrdi3); -EXPORT_SYMBOL(__divsi3); -EXPORT_SYMBOL(__lshrdi3); -EXPORT_SYMBOL(__modsi3); -EXPORT_SYMBOL(__ucmpdi2); -EXPORT_SYMBOL(__udivsi3); -EXPORT_SYMBOL(__umodsi3); - diff --git a/arch/unicore32/kernel/ksyms.h b/arch/unicore32/kernel/ksyms.h deleted file mode 100644 index 5d2d5ba324ac..000000000000 --- a/arch/unicore32/kernel/ksyms.h +++ /dev/null @@ -1,14 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * libgcc functions - functions that are used internally by the - * compiler... (prototypes are not correct though, but that - * doesn't really matter since they're not versioned). - */ -extern void __ashldi3(void); -extern void __ashrdi3(void); -extern void __divsi3(void); -extern void __lshrdi3(void); -extern void __modsi3(void); -extern void __ucmpdi2(void); -extern void __udivsi3(void); -extern void __umodsi3(void); diff --git a/arch/unicore32/kernel/module.c b/arch/unicore32/kernel/module.c deleted file mode 100644 index 67c89ef2d6ee..000000000000 --- a/arch/unicore32/kernel/module.c +++ /dev/null @@ -1,105 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/module.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/module.h> -#include <linux/moduleloader.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/elf.h> -#include <linux/vmalloc.h> -#include <linux/fs.h> -#include <linux/string.h> -#include <linux/gfp.h> - -#include <asm/sections.h> - -void *module_alloc(unsigned long size) -{ - return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, - GFP_KERNEL, PAGE_KERNEL_EXEC, 0, NUMA_NO_NODE, - __builtin_return_address(0)); -} - -int -apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex, - unsigned int relindex, struct module *module) -{ - Elf32_Shdr *symsec = sechdrs + symindex; - Elf32_Shdr *relsec = sechdrs + relindex; - Elf32_Shdr *dstsec = sechdrs + relsec->sh_info; - Elf32_Rel *rel = (void *)relsec->sh_addr; - unsigned int i; - - for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) { - unsigned long loc; - Elf32_Sym *sym; - s32 offset; - - offset = ELF32_R_SYM(rel->r_info); - if (offset < 0 || offset > - (symsec->sh_size / sizeof(Elf32_Sym))) { - printk(KERN_ERR "%s: bad relocation, " - "section %d reloc %d\n", - module->name, relindex, i); - return -ENOEXEC; - } - - sym = ((Elf32_Sym *)symsec->sh_addr) + offset; - - if (rel->r_offset < 0 || rel->r_offset > - dstsec->sh_size - sizeof(u32)) { - printk(KERN_ERR "%s: out of bounds relocation, " - "section %d reloc %d offset %d size %d\n", - module->name, relindex, i, rel->r_offset, - dstsec->sh_size); - return -ENOEXEC; - } - - loc = dstsec->sh_addr + rel->r_offset; - - switch (ELF32_R_TYPE(rel->r_info)) { - case R_UNICORE_NONE: - /* ignore */ - break; - - case R_UNICORE_ABS32: - *(u32 *)loc += sym->st_value; - break; - - case R_UNICORE_PC24: - case R_UNICORE_CALL: - case R_UNICORE_JUMP24: - offset = (*(u32 *)loc & 0x00ffffff) << 2; - if (offset & 0x02000000) - offset -= 0x04000000; - - offset += sym->st_value - loc; - if (offset & 3 || - offset <= (s32)0xfe000000 || - offset >= (s32)0x02000000) { - printk(KERN_ERR - "%s: relocation out of range, section " - "%d reloc %d sym '%s'\n", module->name, - relindex, i, strtab + sym->st_name); - return -ENOEXEC; - } - - offset >>= 2; - - *(u32 *)loc &= 0xff000000; - *(u32 *)loc |= offset & 0x00ffffff; - break; - - default: - printk(KERN_ERR "%s: unknown relocation: %u\n", - module->name, ELF32_R_TYPE(rel->r_info)); - return -ENOEXEC; - } - } - return 0; -} diff --git a/arch/unicore32/kernel/pci.c b/arch/unicore32/kernel/pci.c deleted file mode 100644 index 0d098aa05b47..000000000000 --- a/arch/unicore32/kernel/pci.c +++ /dev/null @@ -1,371 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/pci.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - * - * PCI bios-type initialisation for PCI machines - */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/interrupt.h> -#include <linux/pci.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/io.h> - -static int debug_pci; - -#define CONFIG_CMD(bus, devfn, where) \ - (0x80000000 | (bus->number << 16) | (devfn << 8) | (where & ~3)) - -static int -puv3_read_config(struct pci_bus *bus, unsigned int devfn, int where, - int size, u32 *value) -{ - writel(CONFIG_CMD(bus, devfn, where), PCICFG_ADDR); - switch (size) { - case 1: - *value = (readl(PCICFG_DATA) >> ((where & 3) * 8)) & 0xFF; - break; - case 2: - *value = (readl(PCICFG_DATA) >> ((where & 2) * 8)) & 0xFFFF; - break; - case 4: - *value = readl(PCICFG_DATA); - break; - } - return PCIBIOS_SUCCESSFUL; -} - -static int -puv3_write_config(struct pci_bus *bus, unsigned int devfn, int where, - int size, u32 value) -{ - writel(CONFIG_CMD(bus, devfn, where), PCICFG_ADDR); - switch (size) { - case 1: - writel((readl(PCICFG_DATA) & ~FMASK(8, (where&3)*8)) - | FIELD(value, 8, (where&3)*8), PCICFG_DATA); - break; - case 2: - writel((readl(PCICFG_DATA) & ~FMASK(16, (where&2)*8)) - | FIELD(value, 16, (where&2)*8), PCICFG_DATA); - break; - case 4: - writel(value, PCICFG_DATA); - break; - } - return PCIBIOS_SUCCESSFUL; -} - -struct pci_ops pci_puv3_ops = { - .read = puv3_read_config, - .write = puv3_write_config, -}; - -void pci_puv3_preinit(void) -{ - printk(KERN_DEBUG "PCI: PKUnity PCI Controller Initializing ...\n"); - /* config PCI bridge base */ - writel(io_v2p(PKUNITY_PCIBRI_BASE), PCICFG_BRIBASE); - - writel(0, PCIBRI_AHBCTL0); - writel(io_v2p(PKUNITY_PCIBRI_BASE) | PCIBRI_BARx_MEM, PCIBRI_AHBBAR0); - writel(0xFFFF0000, PCIBRI_AHBAMR0); - writel(0, PCIBRI_AHBTAR0); - - writel(PCIBRI_CTLx_AT, PCIBRI_AHBCTL1); - writel(io_v2p(PKUNITY_PCILIO_BASE) | PCIBRI_BARx_IO, PCIBRI_AHBBAR1); - writel(0xFFFF0000, PCIBRI_AHBAMR1); - writel(0x00000000, PCIBRI_AHBTAR1); - - writel(PCIBRI_CTLx_PREF, PCIBRI_AHBCTL2); - writel(io_v2p(PKUNITY_PCIMEM_BASE) | PCIBRI_BARx_MEM, PCIBRI_AHBBAR2); - writel(0xF8000000, PCIBRI_AHBAMR2); - writel(0, PCIBRI_AHBTAR2); - - writel(io_v2p(PKUNITY_PCIAHB_BASE) | PCIBRI_BARx_MEM, PCIBRI_BAR1); - - writel(PCIBRI_CTLx_AT | PCIBRI_CTLx_PREF, PCIBRI_PCICTL0); - writel(io_v2p(PKUNITY_PCIAHB_BASE) | PCIBRI_BARx_MEM, PCIBRI_PCIBAR0); - writel(0xF8000000, PCIBRI_PCIAMR0); - writel(PKUNITY_SDRAM_BASE, PCIBRI_PCITAR0); - - writel(readl(PCIBRI_CMD) | PCIBRI_CMD_IO | PCIBRI_CMD_MEM, PCIBRI_CMD); -} - -static int pci_puv3_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) -{ - if (dev->bus->number == 0) { -#ifdef CONFIG_ARCH_FPGA /* 4 pci slots */ - if (dev->devfn == 0x00) - return IRQ_PCIINTA; - else if (dev->devfn == 0x08) - return IRQ_PCIINTB; - else if (dev->devfn == 0x10) - return IRQ_PCIINTC; - else if (dev->devfn == 0x18) - return IRQ_PCIINTD; -#endif -#ifdef CONFIG_PUV3_DB0913 /* 3 pci slots */ - if (dev->devfn == 0x30) - return IRQ_PCIINTB; - else if (dev->devfn == 0x60) - return IRQ_PCIINTC; - else if (dev->devfn == 0x58) - return IRQ_PCIINTD; -#endif -#if defined(CONFIG_PUV3_NB0916) || defined(CONFIG_PUV3_SMW0919) - /* only support 2 pci devices */ - if (dev->devfn == 0x00) - return IRQ_PCIINTC; /* sata */ -#endif - } - return -1; -} - -/* - * Only first 128MB of memory can be accessed via PCI. - * We use GFP_DMA to allocate safe buffers to do map/unmap. - * This is really ugly and we need a better way of specifying - * DMA-capable regions of memory. - */ -void __init puv3_pci_adjust_zones(unsigned long max_zone_pfn) -{ - unsigned int sz = SZ_128M >> PAGE_SHIFT; - - max_zone_pfn[ZONE_DMA] = sz; -} - -/* - * If the bus contains any of these devices, then we must not turn on - * parity checking of any kind. - */ -static inline int pdev_bad_for_parity(struct pci_dev *dev) -{ - return 0; -} - -/* - * pcibios_fixup_bus - Called after each bus is probed, - * but before its children are examined. - */ -void pcibios_fixup_bus(struct pci_bus *bus) -{ - struct pci_dev *dev; - u16 features = PCI_COMMAND_SERR - | PCI_COMMAND_PARITY - | PCI_COMMAND_FAST_BACK; - - bus->resource[0] = &ioport_resource; - bus->resource[1] = &iomem_resource; - - /* - * Walk the devices on this bus, working out what we can - * and can't support. - */ - list_for_each_entry(dev, &bus->devices, bus_list) { - u16 status; - - pci_read_config_word(dev, PCI_STATUS, &status); - - /* - * If any device on this bus does not support fast back - * to back transfers, then the bus as a whole is not able - * to support them. Having fast back to back transfers - * on saves us one PCI cycle per transaction. - */ - if (!(status & PCI_STATUS_FAST_BACK)) - features &= ~PCI_COMMAND_FAST_BACK; - - if (pdev_bad_for_parity(dev)) - features &= ~(PCI_COMMAND_SERR - | PCI_COMMAND_PARITY); - - switch (dev->class >> 8) { - case PCI_CLASS_BRIDGE_PCI: - pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &status); - status |= PCI_BRIDGE_CTL_PARITY - | PCI_BRIDGE_CTL_MASTER_ABORT; - status &= ~(PCI_BRIDGE_CTL_BUS_RESET - | PCI_BRIDGE_CTL_FAST_BACK); - pci_write_config_word(dev, PCI_BRIDGE_CONTROL, status); - break; - - case PCI_CLASS_BRIDGE_CARDBUS: - pci_read_config_word(dev, PCI_CB_BRIDGE_CONTROL, - &status); - status |= PCI_CB_BRIDGE_CTL_PARITY - | PCI_CB_BRIDGE_CTL_MASTER_ABORT; - pci_write_config_word(dev, PCI_CB_BRIDGE_CONTROL, - status); - break; - } - } - - /* - * Now walk the devices again, this time setting them up. - */ - list_for_each_entry(dev, &bus->devices, bus_list) { - u16 cmd; - - pci_read_config_word(dev, PCI_COMMAND, &cmd); - cmd |= features; - pci_write_config_word(dev, PCI_COMMAND, cmd); - - pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, - L1_CACHE_BYTES >> 2); - } - - /* - * Propagate the flags to the PCI bridge. - */ - if (bus->self && bus->self->hdr_type == PCI_HEADER_TYPE_BRIDGE) { - if (features & PCI_COMMAND_FAST_BACK) - bus->bridge_ctl |= PCI_BRIDGE_CTL_FAST_BACK; - if (features & PCI_COMMAND_PARITY) - bus->bridge_ctl |= PCI_BRIDGE_CTL_PARITY; - } - - /* - * Report what we did for this bus - */ - printk(KERN_INFO "PCI: bus%d: Fast back to back transfers %sabled\n", - bus->number, (features & PCI_COMMAND_FAST_BACK) ? "en" : "dis"); -} -EXPORT_SYMBOL(pcibios_fixup_bus); - -static struct resource busn_resource = { - .name = "PCI busn", - .start = 0, - .end = 255, - .flags = IORESOURCE_BUS, -}; - -static int __init pci_common_init(void) -{ - struct pci_bus *puv3_bus; - struct pci_host_bridge *bridge; - int ret; - - bridge = pci_alloc_host_bridge(0); - if (!bridge) - return -ENOMEM; - - pci_puv3_preinit(); - - pci_add_resource(&bridge->windows, &ioport_resource); - pci_add_resource(&bridge->windows, &iomem_resource); - pci_add_resource(&bridge->windows, &busn_resource); - bridge->sysdata = NULL; - bridge->busnr = 0; - bridge->ops = &pci_puv3_ops; - bridge->swizzle_irq = pci_common_swizzle; - bridge->map_irq = pci_puv3_map_irq; - - /* Scan our single hose. */ - ret = pci_scan_root_bus_bridge(bridge); - if (ret) { - pci_free_host_bridge(bridge); - return; - } - - puv3_bus = bridge->bus; - - if (!puv3_bus) - panic("PCI: unable to scan bus!"); - - pci_bus_size_bridges(puv3_bus); - pci_bus_assign_resources(puv3_bus); - pci_bus_add_devices(puv3_bus); - return 0; -} -subsys_initcall(pci_common_init); - -char * __init pcibios_setup(char *str) -{ - if (!strcmp(str, "debug")) { - debug_pci = 1; - return NULL; - } - return str; -} - -void pcibios_set_master(struct pci_dev *dev) -{ - /* No special bus mastering setup handling */ -} - -/* - * From arch/i386/kernel/pci-i386.c: - * - * We need to avoid collisions with `mirrored' VGA ports - * and other strange ISA hardware, so we always want the - * addresses to be allocated in the 0x000-0x0ff region - * modulo 0x400. - * - * Why? Because some silly external IO cards only decode - * the low 10 bits of the IO address. The 0x00-0xff region - * is reserved for motherboard devices that decode all 16 - * bits, so it's ok to allocate at, say, 0x2800-0x28ff, - * but we want to try to avoid allocating at 0x2900-0x2bff - * which might be mirrored at 0x0100-0x03ff.. - */ -resource_size_t pcibios_align_resource(void *data, const struct resource *res, - resource_size_t size, resource_size_t align) -{ - resource_size_t start = res->start; - - if (res->flags & IORESOURCE_IO && start & 0x300) - start = (start + 0x3ff) & ~0x3ff; - - start = (start + align - 1) & ~(align - 1); - - return start; -} - -/** - * pcibios_enable_device - Enable I/O and memory. - * @dev: PCI device to be enabled - */ -int pcibios_enable_device(struct pci_dev *dev, int mask) -{ - u16 cmd, old_cmd; - int idx; - struct resource *r; - - pci_read_config_word(dev, PCI_COMMAND, &cmd); - old_cmd = cmd; - for (idx = 0; idx < 6; idx++) { - /* Only set up the requested stuff */ - if (!(mask & (1 << idx))) - continue; - - r = dev->resource + idx; - if (!r->start && r->end) { - printk(KERN_ERR "PCI: Device %s not available because" - " of resource collisions\n", pci_name(dev)); - return -EINVAL; - } - if (r->flags & IORESOURCE_IO) - cmd |= PCI_COMMAND_IO; - if (r->flags & IORESOURCE_MEM) - cmd |= PCI_COMMAND_MEMORY; - } - - /* - * Bridges (eg, cardbus bridges) need to be fully enabled - */ - if ((dev->class >> 16) == PCI_BASE_CLASS_BRIDGE) - cmd |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY; - - if (cmd != old_cmd) { - printk("PCI: enabling device %s (%04x -> %04x)\n", - pci_name(dev), old_cmd, cmd); - pci_write_config_word(dev, PCI_COMMAND, cmd); - } - return 0; -} diff --git a/arch/unicore32/kernel/pm.c b/arch/unicore32/kernel/pm.c deleted file mode 100644 index 94b7f9df6c1a..000000000000 --- a/arch/unicore32/kernel/pm.c +++ /dev/null @@ -1,121 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/pm.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> - * Copyright (C) 2001-2010 Guan Xuetao - */ -#include <linux/init.h> -#include <linux/module.h> -#include <linux/suspend.h> -#include <linux/errno.h> -#include <linux/slab.h> -#include <linux/io.h> - -#include <mach/hardware.h> -#include <mach/pm.h> - -#include "setup.h" - -struct puv3_cpu_pm_fns *puv3_cpu_pm_fns; -static unsigned long *sleep_save; - -int puv3_pm_enter(suspend_state_t state) -{ - unsigned long sleep_save_checksum = 0, checksum = 0; - int i; - - /* skip registers saving for standby */ - if (state != PM_SUSPEND_STANDBY) { - puv3_cpu_pm_fns->save(sleep_save); - /* before sleeping, calculate and save a checksum */ - for (i = 0; i < puv3_cpu_pm_fns->save_count - 1; i++) - sleep_save_checksum += sleep_save[i]; - } - - /* *** go zzz *** */ - puv3_cpu_pm_fns->enter(state); - cpu_init(); -#ifdef CONFIG_INPUT_KEYBOARD - puv3_ps2_init(); -#endif -#ifdef CONFIG_PCI - pci_puv3_preinit(); -#endif - if (state != PM_SUSPEND_STANDBY) { - /* after sleeping, validate the checksum */ - for (i = 0; i < puv3_cpu_pm_fns->save_count - 1; i++) - checksum += sleep_save[i]; - - /* if invalid, display message and wait for a hardware reset */ - if (checksum != sleep_save_checksum) { - while (1) - puv3_cpu_pm_fns->enter(state); - } - puv3_cpu_pm_fns->restore(sleep_save); - } - - pr_debug("*** made it back from resume\n"); - - return 0; -} -EXPORT_SYMBOL_GPL(puv3_pm_enter); - -unsigned long sleep_phys_sp(void *sp) -{ - return virt_to_phys(sp); -} - -static int puv3_pm_valid(suspend_state_t state) -{ - if (puv3_cpu_pm_fns) - return puv3_cpu_pm_fns->valid(state); - - return -EINVAL; -} - -static int puv3_pm_prepare(void) -{ - int ret = 0; - - if (puv3_cpu_pm_fns && puv3_cpu_pm_fns->prepare) - ret = puv3_cpu_pm_fns->prepare(); - - return ret; -} - -static void puv3_pm_finish(void) -{ - if (puv3_cpu_pm_fns && puv3_cpu_pm_fns->finish) - puv3_cpu_pm_fns->finish(); -} - -static struct platform_suspend_ops puv3_pm_ops = { - .valid = puv3_pm_valid, - .enter = puv3_pm_enter, - .prepare = puv3_pm_prepare, - .finish = puv3_pm_finish, -}; - -static int __init puv3_pm_init(void) -{ - if (!puv3_cpu_pm_fns) { - printk(KERN_ERR "no valid puv3_cpu_pm_fns defined\n"); - return -EINVAL; - } - - sleep_save = kmalloc_array(puv3_cpu_pm_fns->save_count, - sizeof(unsigned long), - GFP_KERNEL); - if (!sleep_save) { - printk(KERN_ERR "failed to alloc memory for pm save\n"); - return -ENOMEM; - } - - suspend_set_ops(&puv3_pm_ops); - return 0; -} - -device_initcall(puv3_pm_init); diff --git a/arch/unicore32/kernel/process.c b/arch/unicore32/kernel/process.c deleted file mode 100644 index b4fd3a604a18..000000000000 --- a/arch/unicore32/kernel/process.c +++ /dev/null @@ -1,319 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/process.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <stdarg.h> - -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/sched/debug.h> -#include <linux/sched/task.h> -#include <linux/sched/task_stack.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/stddef.h> -#include <linux/unistd.h> -#include <linux/delay.h> -#include <linux/reboot.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <linux/cpu.h> -#include <linux/elfcore.h> -#include <linux/pm.h> -#include <linux/tick.h> -#include <linux/utsname.h> -#include <linux/uaccess.h> -#include <linux/random.h> -#include <linux/gpio.h> -#include <linux/stacktrace.h> - -#include <asm/cacheflush.h> -#include <asm/processor.h> -#include <asm/stacktrace.h> - -#include "setup.h" - -static const char * const processor_modes[] = { - "UK00", "UK01", "UK02", "UK03", "UK04", "UK05", "UK06", "UK07", - "UK08", "UK09", "UK0A", "UK0B", "UK0C", "UK0D", "UK0E", "UK0F", - "USER", "REAL", "INTR", "PRIV", "UK14", "UK15", "UK16", "ABRT", - "UK18", "UK19", "UK1A", "EXTN", "UK1C", "UK1D", "UK1E", "SUSR" -}; - -void arch_cpu_idle(void) -{ - cpu_do_idle(); - local_irq_enable(); -} - -void machine_halt(void) -{ - gpio_set_value(GPO_SOFT_OFF, 0); -} - -/* - * Function pointers to optional machine specific functions - */ -void (*pm_power_off)(void) = NULL; -EXPORT_SYMBOL(pm_power_off); - -void machine_power_off(void) -{ - if (pm_power_off) - pm_power_off(); - machine_halt(); -} - -void machine_restart(char *cmd) -{ - /* Disable interrupts first */ - local_irq_disable(); - - /* - * Tell the mm system that we are going to reboot - - * we may need it to insert some 1:1 mappings so that - * soft boot works. - */ - setup_mm_for_reboot(); - - /* Clean and invalidate caches */ - flush_cache_all(); - - /* Turn off caching */ - cpu_proc_fin(); - - /* Push out any further dirty data, and ensure cache is empty */ - flush_cache_all(); - - /* - * Now handle reboot code. - */ - if (reboot_mode == REBOOT_SOFT) { - /* Jump into ROM at address 0xffff0000 */ - cpu_reset(VECTORS_BASE); - } else { - writel(0x00002001, PM_PLLSYSCFG); /* cpu clk = 250M */ - writel(0x00100800, PM_PLLDDRCFG); /* ddr clk = 44M */ - writel(0x00002001, PM_PLLVGACFG); /* vga clk = 250M */ - - /* Use on-chip reset capability */ - /* following instructions must be in one icache line */ - __asm__ __volatile__( - " .align 5\n\t" - " stw %1, [%0]\n\t" - "201: ldw r0, [%0]\n\t" - " cmpsub.a r0, #0\n\t" - " bne 201b\n\t" - " stw %3, [%2]\n\t" - " nop; nop; nop\n\t" - /* prefetch 3 instructions at most */ - : - : "r" (PM_PMCR), - "r" (PM_PMCR_CFBSYS | PM_PMCR_CFBDDR - | PM_PMCR_CFBVGA), - "r" (RESETC_SWRR), - "r" (RESETC_SWRR_SRB) - : "r0", "memory"); - } - - /* - * Whoops - the architecture was unable to reboot. - * Tell the user! - */ - mdelay(1000); - printk(KERN_EMERG "Reboot failed -- System halted\n"); - do { } while (1); -} - -void __show_regs(struct pt_regs *regs) -{ - unsigned long flags; - char buf[64]; - - show_regs_print_info(KERN_DEFAULT); - printk("PC is at %pS\n", (void *)instruction_pointer(regs)); - printk("LR is at %pS\n", (void *)regs->UCreg_lr); - printk(KERN_DEFAULT "pc : [<%08lx>] lr : [<%08lx>] psr: %08lx\n" - "sp : %08lx ip : %08lx fp : %08lx\n", - regs->UCreg_pc, regs->UCreg_lr, regs->UCreg_asr, - regs->UCreg_sp, regs->UCreg_ip, regs->UCreg_fp); - printk(KERN_DEFAULT "r26: %08lx r25: %08lx r24: %08lx\n", - regs->UCreg_26, regs->UCreg_25, - regs->UCreg_24); - printk(KERN_DEFAULT "r23: %08lx r22: %08lx r21: %08lx r20: %08lx\n", - regs->UCreg_23, regs->UCreg_22, - regs->UCreg_21, regs->UCreg_20); - printk(KERN_DEFAULT "r19: %08lx r18: %08lx r17: %08lx r16: %08lx\n", - regs->UCreg_19, regs->UCreg_18, - regs->UCreg_17, regs->UCreg_16); - printk(KERN_DEFAULT "r15: %08lx r14: %08lx r13: %08lx r12: %08lx\n", - regs->UCreg_15, regs->UCreg_14, - regs->UCreg_13, regs->UCreg_12); - printk(KERN_DEFAULT "r11: %08lx r10: %08lx r9 : %08lx r8 : %08lx\n", - regs->UCreg_11, regs->UCreg_10, - regs->UCreg_09, regs->UCreg_08); - printk(KERN_DEFAULT "r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", - regs->UCreg_07, regs->UCreg_06, - regs->UCreg_05, regs->UCreg_04); - printk(KERN_DEFAULT "r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", - regs->UCreg_03, regs->UCreg_02, - regs->UCreg_01, regs->UCreg_00); - - flags = regs->UCreg_asr; - buf[0] = flags & PSR_S_BIT ? 'S' : 's'; - buf[1] = flags & PSR_Z_BIT ? 'Z' : 'z'; - buf[2] = flags & PSR_C_BIT ? 'C' : 'c'; - buf[3] = flags & PSR_V_BIT ? 'V' : 'v'; - buf[4] = '\0'; - - printk(KERN_DEFAULT "Flags: %s INTR o%s REAL o%s Mode %s Segment %s\n", - buf, interrupts_enabled(regs) ? "n" : "ff", - fast_interrupts_enabled(regs) ? "n" : "ff", - processor_modes[processor_mode(regs)], - uaccess_kernel() ? "kernel" : "user"); - { - unsigned int ctrl; - - buf[0] = '\0'; - { - unsigned int transbase; - asm("movc %0, p0.c2, #0\n" - : "=r" (transbase)); - snprintf(buf, sizeof(buf), " Table: %08x", transbase); - } - asm("movc %0, p0.c1, #0\n" : "=r" (ctrl)); - - printk(KERN_DEFAULT "Control: %08x%s\n", ctrl, buf); - } -} - -void show_regs(struct pt_regs *regs) -{ - printk(KERN_DEFAULT "\n"); - printk(KERN_DEFAULT "Pid: %d, comm: %20s\n", - task_pid_nr(current), current->comm); - __show_regs(regs); - __backtrace(); -} - -void flush_thread(void) -{ - struct thread_info *thread = current_thread_info(); - struct task_struct *tsk = current; - - memset(thread->used_cp, 0, sizeof(thread->used_cp)); - memset(&tsk->thread.debug, 0, sizeof(struct debug_info)); -#ifdef CONFIG_UNICORE_FPU_F64 - memset(&thread->fpstate, 0, sizeof(struct fp_state)); -#endif -} - -void release_thread(struct task_struct *dead_task) -{ -} - -asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); -asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread"); - -int -copy_thread(unsigned long clone_flags, unsigned long stack_start, - unsigned long stk_sz, struct task_struct *p) -{ - struct thread_info *thread = task_thread_info(p); - struct pt_regs *childregs = task_pt_regs(p); - - memset(&thread->cpu_context, 0, sizeof(struct cpu_context_save)); - thread->cpu_context.sp = (unsigned long)childregs; - if (unlikely(p->flags & PF_KTHREAD)) { - thread->cpu_context.pc = (unsigned long)ret_from_kernel_thread; - thread->cpu_context.r4 = stack_start; - thread->cpu_context.r5 = stk_sz; - memset(childregs, 0, sizeof(struct pt_regs)); - } else { - thread->cpu_context.pc = (unsigned long)ret_from_fork; - *childregs = *current_pt_regs(); - childregs->UCreg_00 = 0; - if (stack_start) - childregs->UCreg_sp = stack_start; - - if (clone_flags & CLONE_SETTLS) - childregs->UCreg_16 = childregs->UCreg_03; - } - return 0; -} - -/* - * Fill in the task's elfregs structure for a core dump. - */ -int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs) -{ - elf_core_copy_regs(elfregs, task_pt_regs(t)); - return 1; -} - -/* - * fill in the fpe structure for a core dump... - */ -int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fp) -{ - struct thread_info *thread = current_thread_info(); - int used_math = thread->used_cp[1] | thread->used_cp[2]; - -#ifdef CONFIG_UNICORE_FPU_F64 - if (used_math) - memcpy(fp, &thread->fpstate, sizeof(*fp)); -#endif - return used_math != 0; -} -EXPORT_SYMBOL(dump_fpu); - -unsigned long get_wchan(struct task_struct *p) -{ - struct stackframe frame; - int count = 0; - if (!p || p == current || p->state == TASK_RUNNING) - return 0; - - frame.fp = thread_saved_fp(p); - frame.sp = thread_saved_sp(p); - frame.lr = 0; /* recovered from the stack */ - frame.pc = thread_saved_pc(p); - do { - int ret = unwind_frame(&frame); - if (ret < 0) - return 0; - if (!in_sched_functions(frame.pc)) - return frame.pc; - } while ((count++) < 16); - return 0; -} - -unsigned long arch_randomize_brk(struct mm_struct *mm) -{ - return randomize_page(mm->brk, 0x02000000); -} - -/* - * The vectors page is always readable from user space for the - * atomic helpers and the signal restart code. Let's declare a mapping - * for it so it is visible through ptrace and /proc/<pid>/mem. - */ - -int vectors_user_mapping(void) -{ - struct mm_struct *mm = current->mm; - return install_special_mapping(mm, 0xffff0000, PAGE_SIZE, - VM_READ | VM_EXEC | - VM_MAYREAD | VM_MAYEXEC | - VM_DONTEXPAND | VM_DONTDUMP, - NULL); -} - -const char *arch_vma_name(struct vm_area_struct *vma) -{ - return (vma->vm_start == 0xffff0000) ? "[vectors]" : NULL; -} diff --git a/arch/unicore32/kernel/ptrace.c b/arch/unicore32/kernel/ptrace.c deleted file mode 100644 index 0f216567b90a..000000000000 --- a/arch/unicore32/kernel/ptrace.c +++ /dev/null @@ -1,147 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/ptrace.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - * - * By Ross Biro 1/23/92 - */ -#include <linux/kernel.h> -#include <linux/ptrace.h> -#include <linux/signal.h> -#include <linux/uaccess.h> -#include <linux/sched/task_stack.h> - -/* - * this routine will get a word off of the processes privileged stack. - * the offset is how far from the base addr as stored in the THREAD. - * this routine assumes that all the privileged stacks are in our - * data space. - */ -static inline long get_user_reg(struct task_struct *task, int offset) -{ - return task_pt_regs(task)->uregs[offset]; -} - -/* - * this routine will put a word on the processes privileged stack. - * the offset is how far from the base addr as stored in the THREAD. - * this routine assumes that all the privileged stacks are in our - * data space. - */ -static inline int -put_user_reg(struct task_struct *task, int offset, long data) -{ - struct pt_regs newregs, *regs = task_pt_regs(task); - int ret = -EINVAL; - - newregs = *regs; - newregs.uregs[offset] = data; - - if (valid_user_regs(&newregs)) { - regs->uregs[offset] = data; - ret = 0; - } - - return ret; -} - -/* - * Called by kernel/ptrace.c when detaching.. - */ -void ptrace_disable(struct task_struct *child) -{ -} - -/* - * We actually access the pt_regs stored on the kernel stack. - */ -static int ptrace_read_user(struct task_struct *tsk, unsigned long off, - unsigned long __user *ret) -{ - unsigned long tmp; - - tmp = 0; - if (off < sizeof(struct pt_regs)) - tmp = get_user_reg(tsk, off >> 2); - - return put_user(tmp, ret); -} - -/* - * We actually access the pt_regs stored on the kernel stack. - */ -static int ptrace_write_user(struct task_struct *tsk, unsigned long off, - unsigned long val) -{ - if (off >= sizeof(struct pt_regs)) - return 0; - - return put_user_reg(tsk, off >> 2, val); -} - -long arch_ptrace(struct task_struct *child, long request, - unsigned long addr, unsigned long data) -{ - int ret; - unsigned long __user *datap = (unsigned long __user *) data; - - switch (request) { - case PTRACE_PEEKUSR: - ret = ptrace_read_user(child, addr, datap); - break; - - case PTRACE_POKEUSR: - ret = ptrace_write_user(child, addr, data); - break; - - case PTRACE_GET_THREAD_AREA: - ret = put_user(task_pt_regs(child)->UCreg_16, - datap); - break; - - default: - ret = ptrace_request(child, request, addr, data); - break; - } - - return ret; -} - -asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno) -{ - unsigned long ip; - - if (!test_thread_flag(TIF_SYSCALL_TRACE)) - return scno; - if (!(current->ptrace & PT_PTRACED)) - return scno; - - /* - * Save IP. IP is used to denote syscall entry/exit: - * IP = 0 -> entry, = 1 -> exit - */ - ip = regs->UCreg_ip; - regs->UCreg_ip = why; - - current_thread_info()->syscall = scno; - - /* the 0x80 provides a way for the tracing parent to distinguish - between a syscall stop and SIGTRAP delivery */ - ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) - ? 0x80 : 0)); - /* - * this isn't the same as continuing with a signal, but it will do - * for normal use. strace only continues with a signal if the - * stopping signal is not SIGTRAP. -brl - */ - if (current->exit_code) { - send_sig(current->exit_code, current, 1); - current->exit_code = 0; - } - regs->UCreg_ip = ip; - - return current_thread_info()->syscall; -} diff --git a/arch/unicore32/kernel/puv3-core.c b/arch/unicore32/kernel/puv3-core.c deleted file mode 100644 index 78f12e627365..000000000000 --- a/arch/unicore32/kernel/puv3-core.c +++ /dev/null @@ -1,276 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/puv3-core.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> - * Copyright (C) 2001-2010 Guan Xuetao - */ - -#include <linux/init.h> -#include <linux/device.h> -#include <linux/amba/bus.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/cnt32_to_63.h> -#include <linux/usb/musb.h> - -#include <asm/irq.h> -#include <mach/hardware.h> -#include <mach/pm.h> - -/* - * This is the PKUnity sched_clock implementation. This has - * a resolution of 271ns, and a maximum value of 32025597s (370 days). - * - * The return value is guaranteed to be monotonic in that range as - * long as there is always less than 582 seconds between successive - * calls to this function. - * - * ( * 1E9 / CLOCK_TICK_RATE ) -> about 2235/32 - */ -unsigned long long sched_clock(void) -{ - unsigned long long v = cnt32_to_63(readl(OST_OSCR)); - - /* original conservative method, but overflow frequently - * v *= NSEC_PER_SEC >> 12; - * do_div(v, CLOCK_TICK_RATE >> 12); - */ - v = ((v & 0x7fffffffffffffffULL) * 2235) >> 5; - - return v; -} - -static struct resource puv3_usb_resources[] = { - /* order is significant! */ - { - .start = io_v2p(PKUNITY_USB_BASE), - .end = io_v2p(PKUNITY_USB_BASE) + 0x3ff, - .flags = IORESOURCE_MEM, - }, { - .start = IRQ_USB, - .flags = IORESOURCE_IRQ, - }, { - .start = IRQ_USB, - .flags = IORESOURCE_IRQ, - }, -}; - -static struct musb_hdrc_config puv3_usb_config[] = { - { - .num_eps = 16, - .multipoint = 1, -#ifdef CONFIG_USB_INVENTRA_DMA - .dma = 1, - .dma_channels = 8, -#endif - }, -}; - -static struct musb_hdrc_platform_data puv3_usb_plat = { - .mode = MUSB_HOST, - .min_power = 100, - .clock = 0, - .config = puv3_usb_config, -}; - -static struct resource puv3_mmc_resources[] = { - [0] = { - .start = io_v2p(PKUNITY_SDC_BASE), - .end = io_v2p(PKUNITY_SDC_BASE) + 0xfff, - .flags = IORESOURCE_MEM, - }, - [1] = { - .start = IRQ_SDC, - .end = IRQ_SDC, - .flags = IORESOURCE_IRQ, - }, -}; - -static struct resource puv3_unigfx_resources[] = { - [0] = { - .start = io_v2p(PKUNITY_UNIGFX_BASE), - .end = io_v2p(PKUNITY_UNIGFX_BASE) + 0xfff, - .flags = IORESOURCE_MEM, - }, -}; - -static struct resource puv3_rtc_resources[] = { - [0] = { - .start = io_v2p(PKUNITY_RTC_BASE), - .end = io_v2p(PKUNITY_RTC_BASE) + 0xff, - .flags = IORESOURCE_MEM, - }, - [1] = { - .start = IRQ_RTCAlarm, - .end = IRQ_RTCAlarm, - .flags = IORESOURCE_IRQ, - }, - [2] = { - .start = IRQ_RTC, - .end = IRQ_RTC, - .flags = IORESOURCE_IRQ - } -}; - -static struct resource puv3_pwm_resources[] = { - [0] = { - .start = io_v2p(PKUNITY_OST_BASE) + 0x80, - .end = io_v2p(PKUNITY_OST_BASE) + 0xff, - .flags = IORESOURCE_MEM, - }, -}; - -static struct resource puv3_uart0_resources[] = { - [0] = { - .start = io_v2p(PKUNITY_UART0_BASE), - .end = io_v2p(PKUNITY_UART0_BASE) + 0xff, - .flags = IORESOURCE_MEM, - }, - [1] = { - .start = IRQ_UART0, - .end = IRQ_UART0, - .flags = IORESOURCE_IRQ - } -}; - -static struct resource puv3_uart1_resources[] = { - [0] = { - .start = io_v2p(PKUNITY_UART1_BASE), - .end = io_v2p(PKUNITY_UART1_BASE) + 0xff, - .flags = IORESOURCE_MEM, - }, - [1] = { - .start = IRQ_UART1, - .end = IRQ_UART1, - .flags = IORESOURCE_IRQ - } -}; - -static struct resource puv3_umal_resources[] = { - [0] = { - .start = io_v2p(PKUNITY_UMAL_BASE), - .end = io_v2p(PKUNITY_UMAL_BASE) + 0x1fff, - .flags = IORESOURCE_MEM, - }, - [1] = { - .start = IRQ_UMAL, - .end = IRQ_UMAL, - .flags = IORESOURCE_IRQ - } -}; - -#ifdef CONFIG_PUV3_PM - -#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x -#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x] - -/* - * List of global PXA peripheral registers to preserve. - * More ones like CP and general purpose register values are preserved - * with the stack pointer in sleep.S. - */ -enum { - SLEEP_SAVE_PM_PLLDDRCFG, - SLEEP_SAVE_COUNT -}; - - -static void puv3_cpu_pm_save(unsigned long *sleep_save) -{ -/* SAVE(PM_PLLDDRCFG); */ -} - -static void puv3_cpu_pm_restore(unsigned long *sleep_save) -{ -/* RESTORE(PM_PLLDDRCFG); */ -} - -static int puv3_cpu_pm_prepare(void) -{ - /* set resume return address */ - writel(virt_to_phys(puv3_cpu_resume), PM_DIVCFG); - return 0; -} - -static void puv3_cpu_pm_enter(suspend_state_t state) -{ - /* Clear reset status */ - writel(RESETC_RSSR_HWR | RESETC_RSSR_WDR - | RESETC_RSSR_SMR | RESETC_RSSR_SWR, RESETC_RSSR); - - switch (state) { -/* case PM_SUSPEND_ON: - puv3_cpu_idle(); - break; */ - case PM_SUSPEND_MEM: - puv3_cpu_pm_prepare(); - puv3_cpu_suspend(PM_PMCR_SFB); - break; - } -} - -static int puv3_cpu_pm_valid(suspend_state_t state) -{ - return state == PM_SUSPEND_MEM; -} - -static void puv3_cpu_pm_finish(void) -{ - /* ensure not to come back here if it wasn't intended */ - /* PSPR = 0; */ -} - -static struct puv3_cpu_pm_fns puv3_cpu_pm_fnss = { - .save_count = SLEEP_SAVE_COUNT, - .valid = puv3_cpu_pm_valid, - .save = puv3_cpu_pm_save, - .restore = puv3_cpu_pm_restore, - .enter = puv3_cpu_pm_enter, - .prepare = puv3_cpu_pm_prepare, - .finish = puv3_cpu_pm_finish, -}; - -static void __init puv3_init_pm(void) -{ - puv3_cpu_pm_fns = &puv3_cpu_pm_fnss; -} -#else -static inline void puv3_init_pm(void) {} -#endif - -void puv3_ps2_init(void) -{ - struct clk *bclk32; - - bclk32 = clk_get(NULL, "BUS32_CLK"); - writel(clk_get_rate(bclk32) / 200000, PS2_CNT); /* should > 5us */ -} - -void __init puv3_core_init(void) -{ - puv3_init_pm(); - puv3_ps2_init(); - - platform_device_register_simple("PKUnity-v3-RTC", -1, - puv3_rtc_resources, ARRAY_SIZE(puv3_rtc_resources)); - platform_device_register_simple("PKUnity-v3-UMAL", -1, - puv3_umal_resources, ARRAY_SIZE(puv3_umal_resources)); - platform_device_register_simple("PKUnity-v3-MMC", -1, - puv3_mmc_resources, ARRAY_SIZE(puv3_mmc_resources)); - platform_device_register_simple("PKUnity-v3-UNIGFX", -1, - puv3_unigfx_resources, ARRAY_SIZE(puv3_unigfx_resources)); - platform_device_register_simple("PKUnity-v3-PWM", -1, - puv3_pwm_resources, ARRAY_SIZE(puv3_pwm_resources)); - platform_device_register_simple("PKUnity-v3-UART", 0, - puv3_uart0_resources, ARRAY_SIZE(puv3_uart0_resources)); - platform_device_register_simple("PKUnity-v3-UART", 1, - puv3_uart1_resources, ARRAY_SIZE(puv3_uart1_resources)); - platform_device_register_simple("PKUnity-v3-AC97", -1, NULL, 0); - platform_device_register_resndata(NULL, "musb_hdrc", -1, - puv3_usb_resources, ARRAY_SIZE(puv3_usb_resources), - &puv3_usb_plat, sizeof(puv3_usb_plat)); -} - diff --git a/arch/unicore32/kernel/puv3-nb0916.c b/arch/unicore32/kernel/puv3-nb0916.c deleted file mode 100644 index e251f5028396..000000000000 --- a/arch/unicore32/kernel/puv3-nb0916.c +++ /dev/null @@ -1,147 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/puv3-nb0916.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> - * Copyright (C) 2001-2010 Guan Xuetao - */ - -#include <linux/init.h> -#include <linux/device.h> -#include <linux/platform_device.h> -#include <linux/mtd/physmap.h> -#include <linux/io.h> -#include <linux/reboot.h> -#include <linux/interrupt.h> -#include <linux/i2c.h> -#include <linux/pwm.h> -#include <linux/pwm_backlight.h> -#include <linux/gpio.h> -#include <linux/gpio_keys.h> -#include <linux/input.h> - -#include <mach/hardware.h> - -static struct physmap_flash_data physmap_flash_data = { - .width = 1, -}; - -static struct resource physmap_flash_resource = { - .start = 0xFFF80000, - .end = 0xFFFFFFFF, - .flags = IORESOURCE_MEM, -}; - -static struct resource puv3_i2c_resources[] = { - [0] = { - .start = io_v2p(PKUNITY_I2C_BASE), - .end = io_v2p(PKUNITY_I2C_BASE) + 0xff, - .flags = IORESOURCE_MEM, - }, - [1] = { - .start = IRQ_I2C, - .end = IRQ_I2C, - .flags = IORESOURCE_IRQ, - } -}; - -static struct pwm_lookup nb0916_pwm_lookup[] = { - PWM_LOOKUP("PKUnity-v3-PWM", 0, "pwm-backlight", NULL, 70 * 1024, - PWM_POLARITY_NORMAL), -}; - -static struct platform_pwm_backlight_data nb0916_backlight_data = { - .max_brightness = 100, - .dft_brightness = 100, -}; - -static struct gpio_keys_button nb0916_gpio_keys[] = { - { - .type = EV_KEY, - .code = KEY_POWER, - .gpio = GPI_SOFF_REQ, - .desc = "Power Button", - .wakeup = 1, - .active_low = 1, - }, - { - .type = EV_KEY, - .code = BTN_TOUCH, - .gpio = GPI_BTN_TOUCH, - .desc = "Touchpad Button", - .wakeup = 1, - .active_low = 1, - }, -}; - -static struct gpio_keys_platform_data nb0916_gpio_button_data = { - .buttons = nb0916_gpio_keys, - .nbuttons = ARRAY_SIZE(nb0916_gpio_keys), -}; - -static irqreturn_t nb0916_lcdcaseoff_handler(int irq, void *dev_id) -{ - if (gpio_get_value(GPI_LCD_CASE_OFF)) - gpio_set_value(GPO_LCD_EN, 1); - else - gpio_set_value(GPO_LCD_EN, 0); - - return IRQ_HANDLED; -} - -static irqreturn_t nb0916_overheat_handler(int irq, void *dev_id) -{ - machine_halt(); - /* SYSTEM HALT, NO RETURN */ - return IRQ_HANDLED; -} - -static struct i2c_board_info __initdata puv3_i2c_devices[] = { - { I2C_BOARD_INFO("lm75", I2C_TAR_THERMAL), }, - { I2C_BOARD_INFO("bq27200", I2C_TAR_PWIC), }, - { I2C_BOARD_INFO("24c02", I2C_TAR_EEPROM), }, -}; - -int __init mach_nb0916_init(void) -{ - i2c_register_board_info(0, puv3_i2c_devices, - ARRAY_SIZE(puv3_i2c_devices)); - - platform_device_register_simple("PKUnity-v3-I2C", -1, - puv3_i2c_resources, ARRAY_SIZE(puv3_i2c_resources)); - - pwm_add_table(nb0916_pwm_lookup, ARRAY_SIZE(nb0916_pwm_lookup)); - - platform_device_register_data(NULL, "pwm-backlight", -1, - &nb0916_backlight_data, sizeof(nb0916_backlight_data)); - - platform_device_register_data(NULL, "gpio-keys", -1, - &nb0916_gpio_button_data, sizeof(nb0916_gpio_button_data)); - - platform_device_register_resndata(NULL, "physmap-flash", -1, - &physmap_flash_resource, 1, - &physmap_flash_data, sizeof(physmap_flash_data)); - - if (request_irq(gpio_to_irq(GPI_LCD_CASE_OFF), - &nb0916_lcdcaseoff_handler, - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, - "NB0916 lcd case off", NULL) < 0) { - - printk(KERN_DEBUG "LCD-Case-OFF IRQ %d not available\n", - gpio_to_irq(GPI_LCD_CASE_OFF)); - } - - if (request_irq(gpio_to_irq(GPI_OTP_INT), &nb0916_overheat_handler, - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, - "NB0916 overheating protection", NULL) < 0) { - - printk(KERN_DEBUG "Overheating Protection IRQ %d not available\n", - gpio_to_irq(GPI_OTP_INT)); - } - - return 0; -} - -subsys_initcall_sync(mach_nb0916_init); diff --git a/arch/unicore32/kernel/setup.c b/arch/unicore32/kernel/setup.c deleted file mode 100644 index 0c4242a5ee1d..000000000000 --- a/arch/unicore32/kernel/setup.c +++ /dev/null @@ -1,352 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/setup.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/stddef.h> -#include <linux/ioport.h> -#include <linux/delay.h> -#include <linux/utsname.h> -#include <linux/initrd.h> -#include <linux/console.h> -#include <linux/memblock.h> -#include <linux/seq_file.h> -#include <linux/screen_info.h> -#include <linux/init.h> -#include <linux/root_dev.h> -#include <linux/cpu.h> -#include <linux/interrupt.h> -#include <linux/smp.h> -#include <linux/fs.h> -#include <linux/proc_fs.h> -#include <linux/elf.h> -#include <linux/io.h> - -#include <asm/cputype.h> -#include <asm/sections.h> -#include <asm/setup.h> -#include <asm/cacheflush.h> -#include <asm/tlbflush.h> -#include <asm/traps.h> -#include <asm/memblock.h> - -#include "setup.h" - -#ifndef MEM_SIZE -#define MEM_SIZE (16*1024*1024) -#endif - -struct stack { - u32 irq[3]; - u32 abt[3]; - u32 und[3]; -} ____cacheline_aligned; - -static struct stack stacks[NR_CPUS]; - -#ifdef CONFIG_VGA_CONSOLE -struct screen_info screen_info; -#endif - -char elf_platform[ELF_PLATFORM_SIZE]; -EXPORT_SYMBOL(elf_platform); - -static char __initdata cmd_line[COMMAND_LINE_SIZE]; - -static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; - -/* - * Standard memory resources - */ -static struct resource mem_res[] = { - { - .name = "Kernel code", - .start = 0, - .end = 0, - .flags = IORESOURCE_SYSTEM_RAM - }, - { - .name = "Kernel data", - .start = 0, - .end = 0, - .flags = IORESOURCE_SYSTEM_RAM - } -}; - -#define kernel_code mem_res[0] -#define kernel_data mem_res[1] - -/* - * These functions re-use the assembly code in head.S, which - * already provide the required functionality. - */ -static void __init setup_processor(void) -{ - printk(KERN_DEFAULT "CPU: UniCore-II [%08x] revision %d, cr=%08lx\n", - uc32_cpuid, (int)(uc32_cpuid >> 16) & 15, cr_alignment); - - sprintf(init_utsname()->machine, "puv3"); - sprintf(elf_platform, "ucv2"); -} - -/* - * cpu_init - initialise one CPU. - * - * cpu_init sets up the per-CPU stacks. - */ -void cpu_init(void) -{ - unsigned int cpu = smp_processor_id(); - struct stack *stk = &stacks[cpu]; - - /* - * setup stacks for re-entrant exception handlers - */ - __asm__ ( - "mov.a asr, %1\n\t" - "add sp, %0, %2\n\t" - "mov.a asr, %3\n\t" - "add sp, %0, %4\n\t" - "mov.a asr, %5\n\t" - "add sp, %0, %6\n\t" - "mov.a asr, %7" - : - : "r" (stk), - "r" (PSR_R_BIT | PSR_I_BIT | INTR_MODE), - "I" (offsetof(struct stack, irq[0])), - "r" (PSR_R_BIT | PSR_I_BIT | ABRT_MODE), - "I" (offsetof(struct stack, abt[0])), - "r" (PSR_R_BIT | PSR_I_BIT | EXTN_MODE), - "I" (offsetof(struct stack, und[0])), - "r" (PSR_R_BIT | PSR_I_BIT | PRIV_MODE) - : "r30", "cc"); -} - -static int __init uc32_add_memory(unsigned long start, unsigned long size) -{ - struct membank *bank = &meminfo.bank[meminfo.nr_banks]; - - if (meminfo.nr_banks >= NR_BANKS) { - printk(KERN_CRIT "NR_BANKS too low, " - "ignoring memory at %#lx\n", start); - return -EINVAL; - } - - /* - * Ensure that start/size are aligned to a page boundary. - * Size is appropriately rounded down, start is rounded up. - */ - size -= start & ~PAGE_MASK; - - bank->start = PAGE_ALIGN(start); - bank->size = size & PAGE_MASK; - - /* - * Check whether this memory region has non-zero size or - * invalid node number. - */ - if (bank->size == 0) - return -EINVAL; - - meminfo.nr_banks++; - return 0; -} - -/* - * Pick out the memory size. We look for mem=size@start, - * where start and size are "size[KkMm]" - */ -static int __init early_mem(char *p) -{ - static int usermem __initdata = 1; - unsigned long size, start; - char *endp; - - /* - * If the user specifies memory size, we - * blow away any automatically generated - * size. - */ - if (usermem) { - usermem = 0; - meminfo.nr_banks = 0; - } - - start = PHYS_OFFSET; - size = memparse(p, &endp); - if (*endp == '@') - start = memparse(endp + 1, NULL); - - uc32_add_memory(start, size); - - return 0; -} -early_param("mem", early_mem); - -static void __init -request_standard_resources(struct meminfo *mi) -{ - struct resource *res; - int i; - - kernel_code.start = virt_to_phys(_stext); - kernel_code.end = virt_to_phys(_etext - 1); - kernel_data.start = virt_to_phys(_sdata); - kernel_data.end = virt_to_phys(_end - 1); - - for (i = 0; i < mi->nr_banks; i++) { - if (mi->bank[i].size == 0) - continue; - - res = memblock_alloc_low(sizeof(*res), SMP_CACHE_BYTES); - if (!res) - panic("%s: Failed to allocate %zu bytes align=%x\n", - __func__, sizeof(*res), SMP_CACHE_BYTES); - - res->name = "System RAM"; - res->start = mi->bank[i].start; - res->end = mi->bank[i].start + mi->bank[i].size - 1; - res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; - - request_resource(&iomem_resource, res); - - if (kernel_code.start >= res->start && - kernel_code.end <= res->end) - request_resource(res, &kernel_code); - if (kernel_data.start >= res->start && - kernel_data.end <= res->end) - request_resource(res, &kernel_data); - } -} - -static void (*init_machine)(void) __initdata; - -static int __init customize_machine(void) -{ - /* customizes platform devices, or adds new ones */ - if (init_machine) - init_machine(); - return 0; -} -arch_initcall(customize_machine); - -void __init setup_arch(char **cmdline_p) -{ - char *from = default_command_line; - - setup_processor(); - - init_mm.start_code = (unsigned long) _stext; - init_mm.end_code = (unsigned long) _etext; - init_mm.end_data = (unsigned long) _edata; - init_mm.brk = (unsigned long) _end; - - /* parse_early_param needs a boot_command_line */ - strlcpy(boot_command_line, from, COMMAND_LINE_SIZE); - - /* populate cmd_line too for later use, preserving boot_command_line */ - strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE); - *cmdline_p = cmd_line; - - parse_early_param(); - - uc32_memblock_init(&meminfo); - - paging_init(); - request_standard_resources(&meminfo); - - cpu_init(); - - /* - * Set up various architecture-specific pointers - */ - init_machine = puv3_core_init; - -#ifdef CONFIG_VT -#if defined(CONFIG_VGA_CONSOLE) - conswitchp = &vga_con; -#endif -#endif - early_trap_init(); -} - -static struct cpu cpuinfo_unicore; - -static int __init topology_init(void) -{ - int i; - - for_each_possible_cpu(i) - register_cpu(&cpuinfo_unicore, i); - - return 0; -} -subsys_initcall(topology_init); - -#ifdef CONFIG_HAVE_PROC_CPU -static int __init proc_cpu_init(void) -{ - struct proc_dir_entry *res; - - res = proc_mkdir("cpu", NULL); - if (!res) - return -ENOMEM; - return 0; -} -fs_initcall(proc_cpu_init); -#endif - -static int c_show(struct seq_file *m, void *v) -{ - seq_printf(m, "Processor\t: UniCore-II rev %d (%s)\n", - (int)(uc32_cpuid >> 16) & 15, elf_platform); - - seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", - loops_per_jiffy / (500000/HZ), - (loops_per_jiffy / (5000/HZ)) % 100); - - /* dump out the processor features */ - seq_puts(m, "Features\t: CMOV UC-F64"); - - seq_printf(m, "\nCPU implementer\t: 0x%02x\n", uc32_cpuid >> 24); - seq_printf(m, "CPU architecture: 2\n"); - seq_printf(m, "CPU revision\t: %d\n", (uc32_cpuid >> 16) & 15); - - seq_printf(m, "Cache type\t: write-back\n" - "Cache clean\t: cp0 c5 ops\n" - "Cache lockdown\t: not support\n" - "Cache format\t: Harvard\n"); - - seq_puts(m, "\n"); - - seq_printf(m, "Hardware\t: PKUnity v3\n"); - - return 0; -} - -static void *c_start(struct seq_file *m, loff_t *pos) -{ - return *pos < 1 ? (void *)1 : NULL; -} - -static void *c_next(struct seq_file *m, void *v, loff_t *pos) -{ - ++*pos; - return NULL; -} - -static void c_stop(struct seq_file *m, void *v) -{ -} - -const struct seq_operations cpuinfo_op = { - .start = c_start, - .next = c_next, - .stop = c_stop, - .show = c_show -}; diff --git a/arch/unicore32/kernel/setup.h b/arch/unicore32/kernel/setup.h deleted file mode 100644 index 967352323185..000000000000 --- a/arch/unicore32/kernel/setup.h +++ /dev/null @@ -1,36 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/unicore32/kernel/setup.h - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#ifndef __UNICORE_KERNEL_SETUP_H__ -#define __UNICORE_KERNEL_SETUP_H__ - -#include <asm/hwdef-copro.h> - -extern void paging_init(void); -extern void puv3_core_init(void); -extern void cpu_init(void); - -extern void puv3_ps2_init(void); -extern void pci_puv3_preinit(void); -extern void __init puv3_init_gpio(void); - -extern void setup_mm_for_reboot(void); - -extern char __stubs_start[], __stubs_end[]; -extern char __vectors_start[], __vectors_end[]; - -extern void kernel_thread_helper(void); - -extern void __init early_signal_init(void); - -extern asmlinkage void __backtrace(void); -extern asmlinkage void c_backtrace(unsigned long fp, const char *loglvl); - -extern void __show_regs(struct pt_regs *); - -#endif diff --git a/arch/unicore32/kernel/signal.c b/arch/unicore32/kernel/signal.c deleted file mode 100644 index 3946182a835d..000000000000 --- a/arch/unicore32/kernel/signal.c +++ /dev/null @@ -1,424 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/signal.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/errno.h> -#include <linux/signal.h> -#include <linux/personality.h> -#include <linux/uaccess.h> -#include <linux/tracehook.h> -#include <linux/elf.h> -#include <linux/unistd.h> - -#include <asm/cacheflush.h> -#include <asm/ucontext.h> - -/* - * For UniCore syscalls, we encode the syscall number into the instruction. - */ -#define SWI_SYS_SIGRETURN (0xff000000) /* error number for new abi */ -#define SWI_SYS_RT_SIGRETURN (0xff000000 | (__NR_rt_sigreturn)) -#define SWI_SYS_RESTART (0xff000000 | (__NR_restart_syscall)) - -#define KERN_SIGRETURN_CODE (KUSER_VECPAGE_BASE + 0x00000500) -#define KERN_RESTART_CODE (KERN_SIGRETURN_CODE + sizeof(sigreturn_codes)) - -const unsigned long sigreturn_codes[3] = { - SWI_SYS_SIGRETURN, SWI_SYS_RT_SIGRETURN, -}; - -const unsigned long syscall_restart_code[2] = { - SWI_SYS_RESTART, /* swi __NR_restart_syscall */ - 0x69efc004, /* ldr pc, [sp], #4 */ -}; - -/* - * Do a signal return; undo the signal stack. These are aligned to 64-bit. - */ -struct sigframe { - struct ucontext uc; - unsigned long retcode[2]; -}; - -struct rt_sigframe { - struct siginfo info; - struct sigframe sig; -}; - -static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf) -{ - sigset_t set; - int err; - - err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set)); - if (err == 0) - set_current_blocked(&set); - - err |= __get_user(regs->UCreg_00, &sf->uc.uc_mcontext.regs.UCreg_00); - err |= __get_user(regs->UCreg_01, &sf->uc.uc_mcontext.regs.UCreg_01); - err |= __get_user(regs->UCreg_02, &sf->uc.uc_mcontext.regs.UCreg_02); - err |= __get_user(regs->UCreg_03, &sf->uc.uc_mcontext.regs.UCreg_03); - err |= __get_user(regs->UCreg_04, &sf->uc.uc_mcontext.regs.UCreg_04); - err |= __get_user(regs->UCreg_05, &sf->uc.uc_mcontext.regs.UCreg_05); - err |= __get_user(regs->UCreg_06, &sf->uc.uc_mcontext.regs.UCreg_06); - err |= __get_user(regs->UCreg_07, &sf->uc.uc_mcontext.regs.UCreg_07); - err |= __get_user(regs->UCreg_08, &sf->uc.uc_mcontext.regs.UCreg_08); - err |= __get_user(regs->UCreg_09, &sf->uc.uc_mcontext.regs.UCreg_09); - err |= __get_user(regs->UCreg_10, &sf->uc.uc_mcontext.regs.UCreg_10); - err |= __get_user(regs->UCreg_11, &sf->uc.uc_mcontext.regs.UCreg_11); - err |= __get_user(regs->UCreg_12, &sf->uc.uc_mcontext.regs.UCreg_12); - err |= __get_user(regs->UCreg_13, &sf->uc.uc_mcontext.regs.UCreg_13); - err |= __get_user(regs->UCreg_14, &sf->uc.uc_mcontext.regs.UCreg_14); - err |= __get_user(regs->UCreg_15, &sf->uc.uc_mcontext.regs.UCreg_15); - err |= __get_user(regs->UCreg_16, &sf->uc.uc_mcontext.regs.UCreg_16); - err |= __get_user(regs->UCreg_17, &sf->uc.uc_mcontext.regs.UCreg_17); - err |= __get_user(regs->UCreg_18, &sf->uc.uc_mcontext.regs.UCreg_18); - err |= __get_user(regs->UCreg_19, &sf->uc.uc_mcontext.regs.UCreg_19); - err |= __get_user(regs->UCreg_20, &sf->uc.uc_mcontext.regs.UCreg_20); - err |= __get_user(regs->UCreg_21, &sf->uc.uc_mcontext.regs.UCreg_21); - err |= __get_user(regs->UCreg_22, &sf->uc.uc_mcontext.regs.UCreg_22); - err |= __get_user(regs->UCreg_23, &sf->uc.uc_mcontext.regs.UCreg_23); - err |= __get_user(regs->UCreg_24, &sf->uc.uc_mcontext.regs.UCreg_24); - err |= __get_user(regs->UCreg_25, &sf->uc.uc_mcontext.regs.UCreg_25); - err |= __get_user(regs->UCreg_26, &sf->uc.uc_mcontext.regs.UCreg_26); - err |= __get_user(regs->UCreg_fp, &sf->uc.uc_mcontext.regs.UCreg_fp); - err |= __get_user(regs->UCreg_ip, &sf->uc.uc_mcontext.regs.UCreg_ip); - err |= __get_user(regs->UCreg_sp, &sf->uc.uc_mcontext.regs.UCreg_sp); - err |= __get_user(regs->UCreg_lr, &sf->uc.uc_mcontext.regs.UCreg_lr); - err |= __get_user(regs->UCreg_pc, &sf->uc.uc_mcontext.regs.UCreg_pc); - err |= __get_user(regs->UCreg_asr, &sf->uc.uc_mcontext.regs.UCreg_asr); - - err |= !valid_user_regs(regs); - - return err; -} - -asmlinkage int __sys_rt_sigreturn(struct pt_regs *regs) -{ - struct rt_sigframe __user *frame; - - /* Always make any pending restarted system calls return -EINTR */ - current->restart_block.fn = do_no_restart_syscall; - - /* - * Since we stacked the signal on a 64-bit boundary, - * then 'sp' should be word aligned here. If it's - * not, then the user is trying to mess with us. - */ - if (regs->UCreg_sp & 7) - goto badframe; - - frame = (struct rt_sigframe __user *)regs->UCreg_sp; - - if (!access_ok(frame, sizeof(*frame))) - goto badframe; - - if (restore_sigframe(regs, &frame->sig)) - goto badframe; - - if (restore_altstack(&frame->sig.uc.uc_stack)) - goto badframe; - - return regs->UCreg_00; - -badframe: - force_sig(SIGSEGV); - return 0; -} - -static int setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, - sigset_t *set) -{ - int err = 0; - - err |= __put_user(regs->UCreg_00, &sf->uc.uc_mcontext.regs.UCreg_00); - err |= __put_user(regs->UCreg_01, &sf->uc.uc_mcontext.regs.UCreg_01); - err |= __put_user(regs->UCreg_02, &sf->uc.uc_mcontext.regs.UCreg_02); - err |= __put_user(regs->UCreg_03, &sf->uc.uc_mcontext.regs.UCreg_03); - err |= __put_user(regs->UCreg_04, &sf->uc.uc_mcontext.regs.UCreg_04); - err |= __put_user(regs->UCreg_05, &sf->uc.uc_mcontext.regs.UCreg_05); - err |= __put_user(regs->UCreg_06, &sf->uc.uc_mcontext.regs.UCreg_06); - err |= __put_user(regs->UCreg_07, &sf->uc.uc_mcontext.regs.UCreg_07); - err |= __put_user(regs->UCreg_08, &sf->uc.uc_mcontext.regs.UCreg_08); - err |= __put_user(regs->UCreg_09, &sf->uc.uc_mcontext.regs.UCreg_09); - err |= __put_user(regs->UCreg_10, &sf->uc.uc_mcontext.regs.UCreg_10); - err |= __put_user(regs->UCreg_11, &sf->uc.uc_mcontext.regs.UCreg_11); - err |= __put_user(regs->UCreg_12, &sf->uc.uc_mcontext.regs.UCreg_12); - err |= __put_user(regs->UCreg_13, &sf->uc.uc_mcontext.regs.UCreg_13); - err |= __put_user(regs->UCreg_14, &sf->uc.uc_mcontext.regs.UCreg_14); - err |= __put_user(regs->UCreg_15, &sf->uc.uc_mcontext.regs.UCreg_15); - err |= __put_user(regs->UCreg_16, &sf->uc.uc_mcontext.regs.UCreg_16); - err |= __put_user(regs->UCreg_17, &sf->uc.uc_mcontext.regs.UCreg_17); - err |= __put_user(regs->UCreg_18, &sf->uc.uc_mcontext.regs.UCreg_18); - err |= __put_user(regs->UCreg_19, &sf->uc.uc_mcontext.regs.UCreg_19); - err |= __put_user(regs->UCreg_20, &sf->uc.uc_mcontext.regs.UCreg_20); - err |= __put_user(regs->UCreg_21, &sf->uc.uc_mcontext.regs.UCreg_21); - err |= __put_user(regs->UCreg_22, &sf->uc.uc_mcontext.regs.UCreg_22); - err |= __put_user(regs->UCreg_23, &sf->uc.uc_mcontext.regs.UCreg_23); - err |= __put_user(regs->UCreg_24, &sf->uc.uc_mcontext.regs.UCreg_24); - err |= __put_user(regs->UCreg_25, &sf->uc.uc_mcontext.regs.UCreg_25); - err |= __put_user(regs->UCreg_26, &sf->uc.uc_mcontext.regs.UCreg_26); - err |= __put_user(regs->UCreg_fp, &sf->uc.uc_mcontext.regs.UCreg_fp); - err |= __put_user(regs->UCreg_ip, &sf->uc.uc_mcontext.regs.UCreg_ip); - err |= __put_user(regs->UCreg_sp, &sf->uc.uc_mcontext.regs.UCreg_sp); - err |= __put_user(regs->UCreg_lr, &sf->uc.uc_mcontext.regs.UCreg_lr); - err |= __put_user(regs->UCreg_pc, &sf->uc.uc_mcontext.regs.UCreg_pc); - err |= __put_user(regs->UCreg_asr, &sf->uc.uc_mcontext.regs.UCreg_asr); - - err |= __put_user(current->thread.trap_no, - &sf->uc.uc_mcontext.trap_no); - err |= __put_user(current->thread.error_code, - &sf->uc.uc_mcontext.error_code); - err |= __put_user(current->thread.address, - &sf->uc.uc_mcontext.fault_address); - err |= __put_user(set->sig[0], &sf->uc.uc_mcontext.oldmask); - - err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set)); - - return err; -} - -static inline void __user *get_sigframe(struct k_sigaction *ka, - struct pt_regs *regs, int framesize) -{ - unsigned long sp = regs->UCreg_sp; - void __user *frame; - - /* - * This is the X/Open sanctioned signal stack switching. - */ - if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp)) - sp = current->sas_ss_sp + current->sas_ss_size; - - /* - * ATPCS B01 mandates 8-byte alignment - */ - frame = (void __user *)((sp - framesize) & ~7); - - /* - * Check that we can actually write to the signal frame. - */ - if (!access_ok(frame, framesize)) - frame = NULL; - - return frame; -} - -static int setup_return(struct pt_regs *regs, struct k_sigaction *ka, - unsigned long __user *rc, void __user *frame, int usig) -{ - unsigned long handler = (unsigned long)ka->sa.sa_handler; - unsigned long retcode; - unsigned long asr = regs->UCreg_asr & ~PSR_f; - - unsigned int idx = 0; - - if (ka->sa.sa_flags & SA_SIGINFO) - idx += 1; - - if (__put_user(sigreturn_codes[idx], rc) || - __put_user(sigreturn_codes[idx+1], rc+1)) - return 1; - - retcode = KERN_SIGRETURN_CODE + (idx << 2); - - regs->UCreg_00 = usig; - regs->UCreg_sp = (unsigned long)frame; - regs->UCreg_lr = retcode; - regs->UCreg_pc = handler; - regs->UCreg_asr = asr; - - return 0; -} - -static int setup_frame(struct ksignal *ksig, sigset_t *set, - struct pt_regs *regs) -{ - struct sigframe __user *frame = get_sigframe(&ksig->ka, regs, sizeof(*frame)); - int err = 0; - - if (!frame) - return 1; - - /* - * Set uc.uc_flags to a value which sc.trap_no would never have. - */ - err |= __put_user(0x5ac3c35a, &frame->uc.uc_flags); - - err |= setup_sigframe(frame, regs, set); - if (err == 0) - err |= setup_return(regs, &ksig->ka, frame->retcode, frame, - ksig->sig); - - return err; -} - -static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, - struct pt_regs *regs) -{ - struct rt_sigframe __user *frame = - get_sigframe(&ksig->ka, regs, sizeof(*frame)); - int err = 0; - - if (!frame) - return 1; - - err |= copy_siginfo_to_user(&frame->info, &ksig->info); - - err |= __put_user(0, &frame->sig.uc.uc_flags); - err |= __put_user(NULL, &frame->sig.uc.uc_link); - err |= __save_altstack(&frame->sig.uc.uc_stack, regs->UCreg_sp); - err |= setup_sigframe(&frame->sig, regs, set); - if (err == 0) - err |= setup_return(regs, &ksig->ka, frame->sig.retcode, frame, - ksig->sig); - - if (err == 0) { - /* - * For realtime signals we must also set the second and third - * arguments for the signal handler. - */ - regs->UCreg_01 = (unsigned long)&frame->info; - regs->UCreg_02 = (unsigned long)&frame->sig.uc; - } - - return err; -} - -static inline void setup_syscall_restart(struct pt_regs *regs) -{ - regs->UCreg_00 = regs->UCreg_ORIG_00; - regs->UCreg_pc -= 4; -} - -/* - * OK, we're invoking a handler - */ -static void handle_signal(struct ksignal *ksig, struct pt_regs *regs, - int syscall) -{ - struct thread_info *thread = current_thread_info(); - sigset_t *oldset = sigmask_to_save(); - int usig = ksig->sig; - int ret; - - /* - * If we were from a system call, check for system call restarting... - */ - if (syscall) { - switch (regs->UCreg_00) { - case -ERESTART_RESTARTBLOCK: - case -ERESTARTNOHAND: - regs->UCreg_00 = -EINTR; - break; - case -ERESTARTSYS: - if (!(ksig->ka.sa.sa_flags & SA_RESTART)) { - regs->UCreg_00 = -EINTR; - break; - } - /* fallthrough */ - case -ERESTARTNOINTR: - setup_syscall_restart(regs); - } - } - - /* - * Set up the stack frame - */ - if (ksig->ka.sa.sa_flags & SA_SIGINFO) - ret = setup_rt_frame(ksig, oldset, regs); - else - ret = setup_frame(ksig, oldset, regs); - - /* - * Check that the resulting registers are actually sane. - */ - ret |= !valid_user_regs(regs); - - signal_setup_done(ret, ksig, 0); -} - -/* - * Note that 'init' is a special process: it doesn't get signals it doesn't - * want to handle. Thus you cannot kill init even with a SIGKILL even by - * mistake. - * - * Note that we go through the signals twice: once to check the signals that - * the kernel can handle, and then we build all the user-level signal handling - * stack-frames in one go after that. - */ -static void do_signal(struct pt_regs *regs, int syscall) -{ - struct ksignal ksig; - - /* - * We want the common case to go fast, which - * is why we may in certain cases get here from - * kernel mode. Just return without doing anything - * if so. - */ - if (!user_mode(regs)) - return; - - if (get_signal(&ksig)) { - handle_signal(&ksig, regs, syscall); - return; - } - - /* - * No signal to deliver to the process - restart the syscall. - */ - if (syscall) { - if (regs->UCreg_00 == -ERESTART_RESTARTBLOCK) { - u32 __user *usp; - - regs->UCreg_sp -= 4; - usp = (u32 __user *)regs->UCreg_sp; - - if (put_user(regs->UCreg_pc, usp) == 0) { - regs->UCreg_pc = KERN_RESTART_CODE; - } else { - regs->UCreg_sp += 4; - force_sigsegv(0); - } - } - if (regs->UCreg_00 == -ERESTARTNOHAND || - regs->UCreg_00 == -ERESTARTSYS || - regs->UCreg_00 == -ERESTARTNOINTR) { - setup_syscall_restart(regs); - } - } - /* If there's no signal to deliver, we just put the saved - * sigmask back. - */ - restore_saved_sigmask(); -} - -asmlinkage void do_notify_resume(struct pt_regs *regs, - unsigned int thread_flags, int syscall) -{ - if (thread_flags & _TIF_SIGPENDING) - do_signal(regs, syscall); - - if (thread_flags & _TIF_NOTIFY_RESUME) { - clear_thread_flag(TIF_NOTIFY_RESUME); - tracehook_notify_resume(regs); - } -} - -/* - * Copy signal return handlers into the vector page, and - * set sigreturn to be a pointer to these. - */ -void __init early_signal_init(void) -{ - memcpy((void *)kuser_vecpage_to_vectors(KERN_SIGRETURN_CODE), - sigreturn_codes, sizeof(sigreturn_codes)); - memcpy((void *)kuser_vecpage_to_vectors(KERN_RESTART_CODE), - syscall_restart_code, sizeof(syscall_restart_code)); - /* Need not to flush icache, since early_trap_init will do it last. */ -} diff --git a/arch/unicore32/kernel/sleep.S b/arch/unicore32/kernel/sleep.S deleted file mode 100644 index 23151abe53c6..000000000000 --- a/arch/unicore32/kernel/sleep.S +++ /dev/null @@ -1,199 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/unicore32/kernel/sleep.S - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> - * Copyright (C) 2001-2010 Guan Xuetao - */ - -#include <linux/linkage.h> -#include <asm/assembler.h> -#include <mach/hardware.h> - - .text - -pkunity_cpu_save_cp: - - @ get coprocessor registers - - movc r3, p0.c7, #0 @ PID - movc r4, p0.c2, #0 @ translation table base addr - movc r5, p0.c1, #0 @ control reg - - - @ store them plus current virtual stack ptr on stack - mov r6, sp - stm.w (r3 - r6), [sp-] - - mov pc, lr - -pkunity_cpu_save_sp: - @ preserve phys address of stack - mov r0, sp - stw.w lr, [sp+], #-4 - b.l sleep_phys_sp - ldw r1, =sleep_save_sp - stw r0, [r1] - ldw.w pc, [sp]+, #4 - -/* - * puv3_cpu_suspend() - * - * Forces CPU into sleep state. - * - * r0 = value for PWRMODE M field for desired sleep state - */ - -ENTRY(puv3_cpu_suspend) - stm.w (r16 - r27, lr), [sp-] @ save registers on stack - stm.w (r4 - r15), [sp-] @ save registers on stack - -#ifdef CONFIG_UNICORE_FPU_F64 - sfm.w (f0 - f7 ), [sp-] - sfm.w (f8 - f15), [sp-] - sfm.w (f16 - f23), [sp-] - sfm.w (f24 - f31), [sp-] - cff r4, s31 - stm.w (r4), [sp-] -#endif - b.l pkunity_cpu_save_cp - - b.l pkunity_cpu_save_sp - - @ clean data cache - mov r1, #0 - movc p0.c5, r1, #14 - nop - nop - nop - nop - - - - @ DDR2 BaseAddr - ldw r0, =(PKUNITY_DDR2CTRL_BASE) - - @ PM BaseAddr - ldw r1, =(PKUNITY_PM_BASE) - - @ set PLL_SYS_CFG reg, 275 - movl r6, #0x00002401 - stw r6, [r1+], #0x18 - @ set PLL_DDR_CFG reg, 66MHz - movl r6, #0x00100c00 - stw r6, [r1+], #0x1c - - @ set wake up source - movl r8, #0x800001ff @ epip4d - stw r8, [r1+], #0xc - - @ set PGSR - movl r5, #0x40000 - stw r5, [r1+], #0x10 - - @ prepare DDR2 refresh settings - ldw r5, [r0+], #0x24 - or r5, r5, #0x00000001 - - @ prepare PMCR for PLL changing - movl r6, #0xc - - @ prepare for closing PLL - movl r7, #0x1 - - @ prepare sleep mode - mov r8, #0x1 - -@ movl r0, 0x11111111 -@ put_word_ocd r0 - b pkunity_cpu_do_suspend - - .ltorg - .align 5 -pkunity_cpu_do_suspend: - b 101f - @ put DDR2 into self-refresh -100: stw r5, [r0+], #0x24 - @ change PLL - stw r6, [r1] - b 1f - - .ltorg - .align 5 -101: b 102f - @ wait for PLL changing complete -1: ldw r6, [r1+], #0x44 - csub.a r6, #0x1 - bne 1b - b 2f - - .ltorg - .align 5 -102: b 100b - @ close PLL -2: stw r7, [r1+], #0x4 - @ enter sleep mode - stw r8, [r1] -3: b 3b - - - - -/* - * puv3_cpu_resume() - * - * entry point from bootloader into kernel during resume - * - * Note: Yes, part of the following code is located into the .data section. - * This is to allow sleep_save_sp to be accessed with a relative load - * while we can't rely on any MMU translation. We could have put - * sleep_save_sp in the .text section as well, but some setups might - * insist on it to be truly read-only. - */ - - .data - .align 5 -ENTRY(puv3_cpu_resume) -@ movl r0, 0x20202020 -@ put_word_ocd r0 - - ldw r0, sleep_save_sp @ stack phys addr - ldw r2, =resume_after_mmu @ its absolute virtual address - ldm (r3 - r6), [r0]+ @ CP regs + virt stack ptr - mov sp, r6 @ CP regs + virt stack ptr - - mov r1, #0 - movc p0.c6, r1, #6 @ invalidate I & D TLBs - movc p0.c5, r1, #28 @ invalidate I & D caches, BTB - - movc p0.c7, r3, #0 @ PID - movc p0.c2, r4, #0 @ translation table base addr - movc p0.c1, r5, #0 @ control reg, turn on mmu - nop - jump r2 - nop - nop - nop - nop - nop - -sleep_save_sp: - .word 0 @ preserve stack phys ptr here - - .text -resume_after_mmu: -@ movl r0, 0x30303030 -@ put_word_ocd r0 - -#ifdef CONFIG_UNICORE_FPU_F64 - lfm.w (f0 - f7 ), [sp]+ - lfm.w (f8 - f15), [sp]+ - lfm.w (f16 - f23), [sp]+ - lfm.w (f24 - f31), [sp]+ - ldm.w (r4), [sp]+ - ctf r4, s31 -#endif - ldm.w (r4 - r15), [sp]+ @ restore registers from stack - ldm.w (r16 - r27, pc), [sp]+ @ return to caller diff --git a/arch/unicore32/kernel/stacktrace.c b/arch/unicore32/kernel/stacktrace.c deleted file mode 100644 index c9d8650e9d78..000000000000 --- a/arch/unicore32/kernel/stacktrace.c +++ /dev/null @@ -1,127 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/stacktrace.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/sched/debug.h> -#include <linux/stacktrace.h> - -#include <asm/stacktrace.h> - -#if defined(CONFIG_FRAME_POINTER) -/* - * Unwind the current stack frame and store the new register values in the - * structure passed as argument. Unwinding is equivalent to a function return, - * hence the new PC value rather than LR should be used for backtrace. - * - * With framepointer enabled, a simple function prologue looks like this: - * mov ip, sp - * stmdb sp!, {fp, ip, lr, pc} - * sub fp, ip, #4 - * - * A simple function epilogue looks like this: - * ldm sp, {fp, sp, pc} - * - * Note that with framepointer enabled, even the leaf functions have the same - * prologue and epilogue, therefore we can ignore the LR value in this case. - */ -int notrace unwind_frame(struct stackframe *frame) -{ - unsigned long high, low; - unsigned long fp = frame->fp; - - /* only go to a higher address on the stack */ - low = frame->sp; - high = ALIGN(low, THREAD_SIZE); - - /* check current frame pointer is within bounds */ - if (fp < (low + 12) || fp + 4 >= high) - return -EINVAL; - - /* restore the registers from the stack frame */ - frame->fp = *(unsigned long *)(fp - 12); - frame->sp = *(unsigned long *)(fp - 8); - frame->pc = *(unsigned long *)(fp - 4); - - return 0; -} -#endif - -void notrace walk_stackframe(struct stackframe *frame, - int (*fn)(struct stackframe *, void *), void *data) -{ - while (1) { - int ret; - - if (fn(frame, data)) - break; - ret = unwind_frame(frame); - if (ret < 0) - break; - } -} -EXPORT_SYMBOL(walk_stackframe); - -#ifdef CONFIG_STACKTRACE -struct stack_trace_data { - struct stack_trace *trace; - unsigned int no_sched_functions; - unsigned int skip; -}; - -static int save_trace(struct stackframe *frame, void *d) -{ - struct stack_trace_data *data = d; - struct stack_trace *trace = data->trace; - unsigned long addr = frame->pc; - - if (data->no_sched_functions && in_sched_functions(addr)) - return 0; - if (data->skip) { - data->skip--; - return 0; - } - - trace->entries[trace->nr_entries++] = addr; - - return trace->nr_entries >= trace->max_entries; -} - -void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) -{ - struct stack_trace_data data; - struct stackframe frame; - - data.trace = trace; - data.skip = trace->skip; - - if (tsk != current) { - data.no_sched_functions = 1; - frame.fp = thread_saved_fp(tsk); - frame.sp = thread_saved_sp(tsk); - frame.lr = 0; /* recovered from the stack */ - frame.pc = thread_saved_pc(tsk); - } else { - register unsigned long current_sp asm("sp"); - - data.no_sched_functions = 0; - frame.fp = (unsigned long)__builtin_frame_address(0); - frame.sp = current_sp; - frame.lr = (unsigned long)__builtin_return_address(0); - frame.pc = (unsigned long)save_stack_trace_tsk; - } - - walk_stackframe(&frame, save_trace, &data); -} - -void save_stack_trace(struct stack_trace *trace) -{ - save_stack_trace_tsk(current, trace); -} -EXPORT_SYMBOL_GPL(save_stack_trace); -#endif diff --git a/arch/unicore32/kernel/sys.c b/arch/unicore32/kernel/sys.c deleted file mode 100644 index 256fb4082296..000000000000 --- a/arch/unicore32/kernel/sys.c +++ /dev/null @@ -1,37 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/sys.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/mm.h> -#include <linux/sem.h> -#include <linux/msg.h> -#include <linux/shm.h> -#include <linux/stat.h> -#include <linux/syscalls.h> -#include <linux/mman.h> -#include <linux/fs.h> -#include <linux/file.h> -#include <linux/ipc.h> -#include <linux/uaccess.h> - -#include <asm/syscalls.h> -#include <asm/cacheflush.h> - -/* Provide the actual syscall number to call mapping. */ -#undef __SYSCALL -#define __SYSCALL(nr, call) [nr] = (call), - -#define sys_mmap2 sys_mmap_pgoff -/* Note that we don't include <linux/unistd.h> but <asm/unistd.h> */ -void *sys_call_table[__NR_syscalls] = { - [0 ... __NR_syscalls-1] = sys_ni_syscall, -#include <asm/unistd.h> -}; diff --git a/arch/unicore32/kernel/time.c b/arch/unicore32/kernel/time.c deleted file mode 100644 index c3a37edf4d40..000000000000 --- a/arch/unicore32/kernel/time.c +++ /dev/null @@ -1,128 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/time.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> - * Copyright (C) 2001-2010 Guan Xuetao - */ -#include <linux/init.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/timex.h> -#include <linux/clockchips.h> - -#include <mach/hardware.h> - -#define MIN_OSCR_DELTA 2 - -static irqreturn_t puv3_ost0_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *c = dev_id; - - /* Disarm the compare/match, signal the event. */ - writel(readl(OST_OIER) & ~OST_OIER_E0, OST_OIER); - writel(readl(OST_OSSR) & ~OST_OSSR_M0, OST_OSSR); - c->event_handler(c); - - return IRQ_HANDLED; -} - -static int -puv3_osmr0_set_next_event(unsigned long delta, struct clock_event_device *c) -{ - unsigned long next, oscr; - - writel(readl(OST_OIER) | OST_OIER_E0, OST_OIER); - next = readl(OST_OSCR) + delta; - writel(next, OST_OSMR0); - oscr = readl(OST_OSCR); - - return (signed)(next - oscr) <= MIN_OSCR_DELTA ? -ETIME : 0; -} - -static int puv3_osmr0_shutdown(struct clock_event_device *evt) -{ - writel(readl(OST_OIER) & ~OST_OIER_E0, OST_OIER); - writel(readl(OST_OSSR) & ~OST_OSSR_M0, OST_OSSR); - return 0; -} - -static struct clock_event_device ckevt_puv3_osmr0 = { - .name = "osmr0", - .features = CLOCK_EVT_FEAT_ONESHOT, - .rating = 200, - .set_next_event = puv3_osmr0_set_next_event, - .set_state_shutdown = puv3_osmr0_shutdown, - .set_state_oneshot = puv3_osmr0_shutdown, -}; - -static u64 puv3_read_oscr(struct clocksource *cs) -{ - return readl(OST_OSCR); -} - -static struct clocksource cksrc_puv3_oscr = { - .name = "oscr", - .rating = 200, - .read = puv3_read_oscr, - .mask = CLOCKSOURCE_MASK(32), - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - -void __init time_init(void) -{ - writel(0, OST_OIER); /* disable any timer interrupts */ - writel(0, OST_OSSR); /* clear status on all timers */ - - clockevents_calc_mult_shift(&ckevt_puv3_osmr0, CLOCK_TICK_RATE, 5); - - ckevt_puv3_osmr0.max_delta_ns = - clockevent_delta2ns(0x7fffffff, &ckevt_puv3_osmr0); - ckevt_puv3_osmr0.max_delta_ticks = 0x7fffffff; - ckevt_puv3_osmr0.min_delta_ns = - clockevent_delta2ns(MIN_OSCR_DELTA * 2, &ckevt_puv3_osmr0) + 1; - ckevt_puv3_osmr0.min_delta_ticks = MIN_OSCR_DELTA * 2; - ckevt_puv3_osmr0.cpumask = cpumask_of(0); - - if (request_irq(IRQ_TIMER0, puv3_ost0_interrupt, - IRQF_TIMER | IRQF_IRQPOLL, "ost0", &ckevt_puv3_osmr0)) - pr_err("Failed to register ost0 interrupt\n"); - - clocksource_register_hz(&cksrc_puv3_oscr, CLOCK_TICK_RATE); - clockevents_register_device(&ckevt_puv3_osmr0); -} - -#ifdef CONFIG_PM -unsigned long osmr[4], oier; - -void puv3_timer_suspend(void) -{ - osmr[0] = readl(OST_OSMR0); - osmr[1] = readl(OST_OSMR1); - osmr[2] = readl(OST_OSMR2); - osmr[3] = readl(OST_OSMR3); - oier = readl(OST_OIER); -} - -void puv3_timer_resume(void) -{ - writel(0, OST_OSSR); - writel(osmr[0], OST_OSMR0); - writel(osmr[1], OST_OSMR1); - writel(osmr[2], OST_OSMR2); - writel(osmr[3], OST_OSMR3); - writel(oier, OST_OIER); - - /* - * OSMR0 is the system timer: make sure OSCR is sufficiently behind - */ - writel(readl(OST_OSMR0) - LATCH, OST_OSCR); -} -#else -void puv3_timer_suspend(void) { }; -void puv3_timer_resume(void) { }; -#endif - diff --git a/arch/unicore32/kernel/traps.c b/arch/unicore32/kernel/traps.c deleted file mode 100644 index a3ac01df1a2e..000000000000 --- a/arch/unicore32/kernel/traps.c +++ /dev/null @@ -1,322 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/kernel/traps.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - * - * 'traps.c' handles hardware exceptions after we have saved some state. - * Mostly a debugging aid, but will probably kill the offending process. - */ -#include <linux/module.h> -#include <linux/signal.h> -#include <linux/sched/signal.h> -#include <linux/sched/debug.h> -#include <linux/sched/task_stack.h> -#include <linux/spinlock.h> -#include <linux/personality.h> -#include <linux/kallsyms.h> -#include <linux/kdebug.h> -#include <linux/uaccess.h> -#include <linux/delay.h> -#include <linux/hardirq.h> -#include <linux/init.h> -#include <linux/atomic.h> -#include <linux/unistd.h> - -#include <asm/cacheflush.h> -#include <asm/traps.h> - -#include "setup.h" - -static void dump_mem(const char *, const char *, unsigned long, unsigned long); - -void dump_backtrace_entry(unsigned long where, - unsigned long from, unsigned long frame) -{ -#ifdef CONFIG_KALLSYMS - printk(KERN_DEFAULT "[<%08lx>] (%pS) from [<%08lx>] (%pS)\n", - where, (void *)where, from, (void *)from); -#else - printk(KERN_DEFAULT "Function entered at [<%08lx>] from [<%08lx>]\n", - where, from); -#endif -} - -/* - * Stack pointers should always be within the kernels view of - * physical memory. If it is not there, then we can't dump - * out any information relating to the stack. - */ -static int verify_stack(unsigned long sp) -{ - if (sp < PAGE_OFFSET || - (sp > (unsigned long)high_memory && high_memory != NULL)) - return -EFAULT; - - return 0; -} - -/* - * Dump out the contents of some memory nicely... - */ -static void dump_mem(const char *lvl, const char *str, unsigned long bottom, - unsigned long top) -{ - unsigned long first; - mm_segment_t fs; - int i; - - /* - * We need to switch to kernel mode so that we can use __get_user - * to safely read from kernel space. Note that we now dump the - * code first, just in case the backtrace kills us. - */ - fs = get_fs(); - set_fs(KERNEL_DS); - - printk(KERN_DEFAULT "%s%s(0x%08lx to 0x%08lx)\n", - lvl, str, bottom, top); - - for (first = bottom & ~31; first < top; first += 32) { - unsigned long p; - char str[sizeof(" 12345678") * 8 + 1]; - - memset(str, ' ', sizeof(str)); - str[sizeof(str) - 1] = '\0'; - - for (p = first, i = 0; i < 8 && p < top; i++, p += 4) { - if (p >= bottom && p < top) { - unsigned long val; - if (__get_user(val, (unsigned long *)p) == 0) - sprintf(str + i * 9, " %08lx", val); - else - sprintf(str + i * 9, " ????????"); - } - } - printk(KERN_DEFAULT "%s%04lx:%s\n", lvl, first & 0xffff, str); - } - - set_fs(fs); -} - -static void dump_instr(const char *lvl, struct pt_regs *regs) -{ - unsigned long addr = instruction_pointer(regs); - const int width = 8; - mm_segment_t fs; - char str[sizeof("00000000 ") * 5 + 2 + 1], *p = str; - int i; - - /* - * We need to switch to kernel mode so that we can use __get_user - * to safely read from kernel space. Note that we now dump the - * code first, just in case the backtrace kills us. - */ - fs = get_fs(); - set_fs(KERNEL_DS); - - for (i = -4; i < 1; i++) { - unsigned int val, bad; - - bad = __get_user(val, &((u32 *)addr)[i]); - - if (!bad) - p += sprintf(p, i == 0 ? "(%0*x) " : "%0*x ", - width, val); - else { - p += sprintf(p, "bad PC value"); - break; - } - } - printk(KERN_DEFAULT "%sCode: %s\n", lvl, str); - - set_fs(fs); -} - -static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk, - const char *loglvl) -{ - unsigned int fp; - int ok = 1; - - printk("%sBacktrace: ", loglvl); - - if (!tsk) - tsk = current; - - if (regs) - fp = regs->UCreg_fp; - else if (tsk != current) - fp = thread_saved_fp(tsk); - else - asm("mov %0, fp" : "=r" (fp) : : "cc"); - - if (!fp) { - printk("%sno frame pointer", loglvl); - ok = 0; - } else if (verify_stack(fp)) { - printk("%sinvalid frame pointer 0x%08x", loglvl, fp); - ok = 0; - } else if (fp < (unsigned long)end_of_stack(tsk)) - printk("%sframe pointer underflow", loglvl); - printk("%s\n", loglvl); - - if (ok) - c_backtrace(fp, loglvl); -} - -void show_stack(struct task_struct *tsk, unsigned long *sp, - const char *loglvl) -{ - dump_backtrace(NULL, tsk, loglvl); - barrier(); -} - -static int __die(const char *str, int err, struct thread_info *thread, - struct pt_regs *regs) -{ - struct task_struct *tsk = thread->task; - static int die_counter; - int ret; - - printk(KERN_EMERG "Internal error: %s: %x [#%d]\n", - str, err, ++die_counter); - - /* trap and error numbers are mostly meaningless on UniCore */ - ret = notify_die(DIE_OOPS, str, regs, err, tsk->thread.trap_no, \ - SIGSEGV); - if (ret == NOTIFY_STOP) - return ret; - - print_modules(); - __show_regs(regs); - printk(KERN_EMERG "Process %.*s (pid: %d, stack limit = 0x%p)\n", - TASK_COMM_LEN, tsk->comm, task_pid_nr(tsk), thread + 1); - - if (!user_mode(regs) || in_interrupt()) { - dump_mem(KERN_EMERG, "Stack: ", regs->UCreg_sp, - THREAD_SIZE + (unsigned long)task_stack_page(tsk)); - dump_backtrace(regs, tsk, KERN_EMERG); - dump_instr(KERN_EMERG, regs); - } - - return ret; -} - -DEFINE_SPINLOCK(die_lock); - -/* - * This function is protected against re-entrancy. - */ -void die(const char *str, struct pt_regs *regs, int err) -{ - struct thread_info *thread = current_thread_info(); - int ret; - - oops_enter(); - - spin_lock_irq(&die_lock); - console_verbose(); - bust_spinlocks(1); - ret = __die(str, err, thread, regs); - - bust_spinlocks(0); - add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE); - spin_unlock_irq(&die_lock); - oops_exit(); - - if (in_interrupt()) - panic("Fatal exception in interrupt"); - if (panic_on_oops) - panic("Fatal exception"); - if (ret != NOTIFY_STOP) - do_exit(SIGSEGV); -} - -void uc32_notify_die(const char *str, struct pt_regs *regs, - int sig, int code, void __user *addr, - unsigned long err, unsigned long trap) -{ - if (user_mode(regs)) { - current->thread.error_code = err; - current->thread.trap_no = trap; - - force_sig_fault(sig, code, addr); - } else - die(str, regs, err); -} - -/* - * bad_mode handles the impossible case in the vectors. If you see one of - * these, then it's extremely serious, and could mean you have buggy hardware. - * It never returns, and never tries to sync. We hope that we can at least - * dump out some state information... - */ -asmlinkage void bad_mode(struct pt_regs *regs, unsigned int reason) -{ - console_verbose(); - - printk(KERN_CRIT "Bad mode detected with reason 0x%x\n", reason); - - die("Oops - bad mode", regs, 0); - local_irq_disable(); - panic("bad mode"); -} - -void __pte_error(const char *file, int line, unsigned long val) -{ - printk(KERN_DEFAULT "%s:%d: bad pte %08lx.\n", file, line, val); -} - -void __pmd_error(const char *file, int line, unsigned long val) -{ - printk(KERN_DEFAULT "%s:%d: bad pmd %08lx.\n", file, line, val); -} - -void __pgd_error(const char *file, int line, unsigned long val) -{ - printk(KERN_DEFAULT "%s:%d: bad pgd %08lx.\n", file, line, val); -} - -asmlinkage void __div0(void) -{ - printk(KERN_DEFAULT "Division by zero in kernel.\n"); - dump_stack(); -} -EXPORT_SYMBOL(__div0); - -void abort(void) -{ - BUG(); - - /* if that doesn't kill us, halt */ - panic("Oops failed to kill thread"); -} - -void __init trap_init(void) -{ - return; -} - -void __init early_trap_init(void) -{ - unsigned long vectors = VECTORS_BASE; - - /* - * Copy the vectors, stubs (in entry-unicore.S) - * into the vector page, mapped at 0xffff0000, and ensure these - * are visible to the instruction stream. - */ - memcpy((void *)vectors, - __vectors_start, - __vectors_end - __vectors_start); - memcpy((void *)vectors + 0x200, - __stubs_start, - __stubs_end - __stubs_start); - - early_signal_init(); - - flush_icache_range(vectors, vectors + PAGE_SIZE); -} diff --git a/arch/unicore32/kernel/vmlinux.lds.S b/arch/unicore32/kernel/vmlinux.lds.S deleted file mode 100644 index 6fb320b337ef..000000000000 --- a/arch/unicore32/kernel/vmlinux.lds.S +++ /dev/null @@ -1,59 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/unicore32/kernel/vmlinux.lds.S - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ - -#include <asm-generic/vmlinux.lds.h> -#include <asm/thread_info.h> -#include <asm/memory.h> -#include <asm/page.h> -#include <asm/cache.h> - -OUTPUT_ARCH(unicore32) -ENTRY(stext) - -jiffies = jiffies_64; - -SECTIONS -{ - . = PAGE_OFFSET + KERNEL_IMAGE_START; - - _text = .; - __init_begin = .; - HEAD_TEXT_SECTION - INIT_TEXT_SECTION(PAGE_SIZE) - INIT_DATA_SECTION(16) - PERCPU_SECTION(L1_CACHE_BYTES) - __init_end = .; - - _stext = .; - .text : { /* Real text segment */ - TEXT_TEXT - SCHED_TEXT - CPUIDLE_TEXT - LOCK_TEXT - - *(.fixup) - *(.gnu.warning) - } - _etext = .; - - _sdata = .; - RO_DATA(PAGE_SIZE) - RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) - _edata = .; - - EXCEPTION_TABLE(L1_CACHE_BYTES) - - BSS_SECTION(0, 0, 0) - _end = .; - - STABS_DEBUG - DWARF_DEBUG - - DISCARDS /* Exit code and data */ -} |