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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
1da177e4 LT |
2 | /* |
3 | * linux/arch/arm/lib/io-writesl.S | |
4 | * | |
5 | * Copyright (C) 1995-2000 Russell King | |
1da177e4 LT |
6 | */ |
7 | #include <linux/linkage.h> | |
8 | #include <asm/assembler.h> | |
9 | ||
10 | ENTRY(__raw_writesl) | |
11 | teq r2, #0 @ do we have to check for the zero len? | |
6ebbf2ce | 12 | reteq lr |
1da177e4 LT |
13 | ands ip, r1, #3 |
14 | bne 3f | |
15 | ||
16 | subs r2, r2, #4 | |
17 | bmi 2f | |
18 | stmfd sp!, {r4, lr} | |
19 | 1: ldmia r1!, {r3, r4, ip, lr} | |
20 | subs r2, r2, #4 | |
21 | str r3, [r0, #0] | |
22 | str r4, [r0, #0] | |
23 | str ip, [r0, #0] | |
24 | str lr, [r0, #0] | |
25 | bpl 1b | |
26 | ldmfd sp!, {r4, lr} | |
27 | 2: movs r2, r2, lsl #31 | |
e44fc388 | 28 | ldmiacs r1!, {r3, ip} |
1da177e4 LT |
29 | strcs r3, [r0, #0] |
30 | ldrne r3, [r1, #0] | |
31 | strcs ip, [r0, #0] | |
32 | strne r3, [r0, #0] | |
6ebbf2ce | 33 | ret lr |
1da177e4 LT |
34 | |
35 | 3: bic r1, r1, #3 | |
36 | ldr r3, [r1], #4 | |
37 | cmp ip, #2 | |
38 | blt 5f | |
39 | bgt 6f | |
40 | ||
d98b90ea | 41 | 4: mov ip, r3, lspull #16 |
1da177e4 LT |
42 | ldr r3, [r1], #4 |
43 | subs r2, r2, #1 | |
d98b90ea | 44 | orr ip, ip, r3, lspush #16 |
1da177e4 LT |
45 | str ip, [r0] |
46 | bne 4b | |
6ebbf2ce | 47 | ret lr |
1da177e4 | 48 | |
d98b90ea | 49 | 5: mov ip, r3, lspull #8 |
1da177e4 LT |
50 | ldr r3, [r1], #4 |
51 | subs r2, r2, #1 | |
d98b90ea | 52 | orr ip, ip, r3, lspush #24 |
1da177e4 LT |
53 | str ip, [r0] |
54 | bne 5b | |
6ebbf2ce | 55 | ret lr |
1da177e4 | 56 | |
d98b90ea | 57 | 6: mov ip, r3, lspull #24 |
1da177e4 LT |
58 | ldr r3, [r1], #4 |
59 | subs r2, r2, #1 | |
d98b90ea | 60 | orr ip, ip, r3, lspush #8 |
1da177e4 LT |
61 | str ip, [r0] |
62 | bne 6b | |
6ebbf2ce | 63 | ret lr |
93ed3970 | 64 | ENDPROC(__raw_writesl) |