diff options
Diffstat (limited to 'arch/unicore32/kernel/sleep.S')
| -rw-r--r-- | arch/unicore32/kernel/sleep.S | 199 |
1 files changed, 0 insertions, 199 deletions
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 |