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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}
|
|
