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123 lines
2.0 KiB
123 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* linux/arch/arm/lib/io-writesw-armv3.S |
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* |
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* Copyright (C) 1995-2000 Russell King |
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*/ |
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#include <linux/linkage.h> |
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#include <asm/assembler.h> |
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.Loutsw_bad_alignment: |
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adr r0, .Loutsw_bad_align_msg |
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mov r2, lr |
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b panic |
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.Loutsw_bad_align_msg: |
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.asciz "outsw: bad buffer alignment (0x%p, lr=0x%08lX)\n" |
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.align |
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.Loutsw_align: tst r1, #1 |
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bne .Loutsw_bad_alignment |
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add r1, r1, #2 |
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ldr r3, [r1, #-4] |
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mov r3, r3, lsr #16 |
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orr r3, r3, r3, lsl #16 |
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str r3, [r0] |
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subs r2, r2, #1 |
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reteq lr |
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ENTRY(__raw_writesw) |
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teq r2, #0 @ do we have to check for the zero len? |
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reteq lr |
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tst r1, #3 |
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bne .Loutsw_align |
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stmfd sp!, {r4, r5, r6, lr} |
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subs r2, r2, #8 |
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bmi .Lno_outsw_8 |
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.Loutsw_8_lp: ldmia r1!, {r3, r4, r5, r6} |
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mov ip, r3, lsl #16 |
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orr ip, ip, ip, lsr #16 |
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str ip, [r0] |
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mov ip, r3, lsr #16 |
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orr ip, ip, ip, lsl #16 |
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str ip, [r0] |
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mov ip, r4, lsl #16 |
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orr ip, ip, ip, lsr #16 |
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str ip, [r0] |
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mov ip, r4, lsr #16 |
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orr ip, ip, ip, lsl #16 |
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str ip, [r0] |
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mov ip, r5, lsl #16 |
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orr ip, ip, ip, lsr #16 |
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str ip, [r0] |
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mov ip, r5, lsr #16 |
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orr ip, ip, ip, lsl #16 |
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str ip, [r0] |
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mov ip, r6, lsl #16 |
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orr ip, ip, ip, lsr #16 |
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str ip, [r0] |
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mov ip, r6, lsr #16 |
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orr ip, ip, ip, lsl #16 |
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str ip, [r0] |
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subs r2, r2, #8 |
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bpl .Loutsw_8_lp |
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tst r2, #7 |
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ldmfdeq sp!, {r4, r5, r6, pc} |
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.Lno_outsw_8: tst r2, #4 |
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beq .Lno_outsw_4 |
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ldmia r1!, {r3, r4} |
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mov ip, r3, lsl #16 |
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orr ip, ip, ip, lsr #16 |
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str ip, [r0] |
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mov ip, r3, lsr #16 |
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orr ip, ip, ip, lsl #16 |
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str ip, [r0] |
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mov ip, r4, lsl #16 |
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orr ip, ip, ip, lsr #16 |
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str ip, [r0] |
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mov ip, r4, lsr #16 |
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orr ip, ip, ip, lsl #16 |
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str ip, [r0] |
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.Lno_outsw_4: tst r2, #2 |
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beq .Lno_outsw_2 |
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ldr r3, [r1], #4 |
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mov ip, r3, lsl #16 |
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orr ip, ip, ip, lsr #16 |
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str ip, [r0] |
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mov ip, r3, lsr #16 |
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orr ip, ip, ip, lsl #16 |
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str ip, [r0] |
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.Lno_outsw_2: tst r2, #1 |
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ldrne r3, [r1] |
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movne ip, r3, lsl #16 |
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orrne ip, ip, ip, lsr #16 |
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strne ip, [r0] |
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ldmfd sp!, {r4, r5, r6, pc}
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