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- /* 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}
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