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