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Diffstat (limited to 'arch/unicore32/lib/copy_template.S')
| -rw-r--r-- | arch/unicore32/lib/copy_template.S | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/arch/unicore32/lib/copy_template.S b/arch/unicore32/lib/copy_template.S deleted file mode 100644 index 02a7aef83fbf..000000000000 --- a/arch/unicore32/lib/copy_template.S +++ /dev/null @@ -1,211 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/unicore32/lib/copy_template.S - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ - -/* - * Theory of operation - * ------------------- - * - * This file provides the core code for a forward memory copy used in - * the implementation of memcopy(), copy_to_user() and copy_from_user(). - * - * The including file must define the following accessor macros - * according to the need of the given function: - * - * ldr1w ptr reg abort - * - * This loads one word from 'ptr', stores it in 'reg' and increments - * 'ptr' to the next word. The 'abort' argument is used for fixup tables. - * - * ldr4w ptr reg1 reg2 reg3 reg4 abort - * ldr8w ptr, reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort - * - * This loads four or eight words starting from 'ptr', stores them - * in provided registers and increments 'ptr' past those words. - * The'abort' argument is used for fixup tables. - * - * ldr1b ptr reg cond abort - * - * Similar to ldr1w, but it loads a byte and increments 'ptr' one byte. - * It also must apply the condition code if provided, otherwise the - * "al" condition is assumed by default. - * - * str1w ptr reg abort - * str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort - * str1b ptr reg cond abort - * - * Same as their ldr* counterparts, but data is stored to 'ptr' location - * rather than being loaded. - * - * enter - * - * Preserve the provided registers on the stack plus any additional - * data as needed by the implementation including this code. Called - * upon code entry. - * - * exit - * - * Restore registers with the values previously saved with the - * 'preserv' macro. Called upon code termination. - */ - - - enter - - sub.a r2, r2, #4 - bsl 8f - and.a ip, r0, #3 - bne 9f - and.a ip, r1, #3 - bne 10f - -1: sub.a r2, r2, #(28) - stm.w (r5 - r8), [sp-] - bsl 5f - -3: -4: ldr8w r1, r3, r4, r5, r6, r7, r8, r10, r11, abort=20f - sub.a r2, r2, #32 - str8w r0, r3, r4, r5, r6, r7, r8, r10, r11, abort=20f - beg 3b - -5: and.a ip, r2, #28 - rsub ip, ip, #32 - beq 7f - add pc, pc, ip @ C is always clear here - nop - - ldr1w r1, r3, abort=20f - ldr1w r1, r4, abort=20f - ldr1w r1, r5, abort=20f - ldr1w r1, r6, abort=20f - ldr1w r1, r7, abort=20f - ldr1w r1, r8, abort=20f - ldr1w r1, r11, abort=20f - - add pc, pc, ip - nop - - str1w r0, r3, abort=20f - str1w r0, r4, abort=20f - str1w r0, r5, abort=20f - str1w r0, r6, abort=20f - str1w r0, r7, abort=20f - str1w r0, r8, abort=20f - str1w r0, r11, abort=20f - -7: ldm.w (r5 - r8), [sp]+ - -8: mov.a r2, r2 << #31 - ldr1b r1, r3, ne, abort=21f - ldr1b r1, r4, ea, abort=21f - ldr1b r1, r10, ea, abort=21f - str1b r0, r3, ne, abort=21f - str1b r0, r4, ea, abort=21f - str1b r0, r10, ea, abort=21f - - exit - -9: rsub ip, ip, #4 - csub.a ip, #2 - ldr1b r1, r3, sg, abort=21f - ldr1b r1, r4, eg, abort=21f - ldr1b r1, r11, abort=21f - str1b r0, r3, sg, abort=21f - str1b r0, r4, eg, abort=21f - sub.a r2, r2, ip - str1b r0, r11, abort=21f - bsl 8b - and.a ip, r1, #3 - beq 1b - -10: andn r1, r1, #3 - csub.a ip, #2 - ldr1w r1, r11, abort=21f - beq 17f - bsg 18f - - - .macro forward_copy_shift a b - - sub.a r2, r2, #28 - bsl 14f - -11: stm.w (r5 - r9), [sp-] - -12: - ldr4w r1, r4, r5, r6, r7, abort=19f - mov r3, r11 pull #\a - sub.a r2, r2, #32 - ldr4w r1, r8, r9, r10, r11, abort=19f - or r3, r3, r4 push #\b - mov r4, r4 pull #\a - or r4, r4, r5 push #\b - mov r5, r5 pull #\a - or r5, r5, r6 push #\b - mov r6, r6 pull #\a - or r6, r6, r7 push #\b - mov r7, r7 pull #\a - or r7, r7, r8 push #\b - mov r8, r8 pull #\a - or r8, r8, r9 push #\b - mov r9, r9 pull #\a - or r9, r9, r10 push #\b - mov r10, r10 pull #\a - or r10, r10, r11 push #\b - str8w r0, r3, r4, r5, r6, r7, r8, r9, r10, , abort=19f - beg 12b - - ldm.w (r5 - r9), [sp]+ - -14: and.a ip, r2, #28 - beq 16f - -15: mov r3, r11 pull #\a - ldr1w r1, r11, abort=21f - sub.a ip, ip, #4 - or r3, r3, r11 push #\b - str1w r0, r3, abort=21f - bsg 15b - -16: sub r1, r1, #(\b / 8) - b 8b - - .endm - - - forward_copy_shift a=8 b=24 - -17: forward_copy_shift a=16 b=16 - -18: forward_copy_shift a=24 b=8 - - -/* - * Abort preamble and completion macros. - * If a fixup handler is required then those macros must surround it. - * It is assumed that the fixup code will handle the private part of - * the exit macro. - */ - - .macro copy_abort_preamble -19: ldm.w (r5 - r9), [sp]+ - b 21f -299: .word 0 @ store lr - @ to avoid function call in fixup -20: ldm.w (r5 - r8), [sp]+ -21: - adr r1, 299b - stw lr, [r1] - .endm - - .macro copy_abort_end - adr lr, 299b - ldw pc, [lr] - .endm - |