Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm26/lib/io-writesl.S | |
3 | * | |
4 | * Copyright (C) 1995-2000 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #include <linux/linkage.h> | |
11 | #include <asm/assembler.h> | |
12 | #include <asm/hardware.h> | |
13 | ||
14 | ENTRY(__raw_writesl) | |
15 | teq r2, #0 @ do we have to check for the zero len? | |
16 | moveq pc, lr | |
17 | ands ip, r1, #3 | |
18 | bne 2f | |
19 | ||
20 | 1: ldr r3, [r1], #4 | |
21 | str r3, [r0] | |
22 | subs r2, r2, #1 | |
23 | bne 1b | |
24 | mov pc, lr | |
25 | ||
26 | 2: bic r1, r1, #3 | |
27 | cmp ip, #2 | |
28 | ldr r3, [r1], #4 | |
29 | bgt 4f | |
30 | blt 5f | |
31 | ||
32 | 3: mov ip, r3, lsr #16 | |
33 | ldr r3, [r1], #4 | |
34 | orr ip, ip, r3, lsl #16 | |
35 | str ip, [r0] | |
36 | subs r2, r2, #1 | |
37 | bne 3b | |
38 | mov pc, lr | |
39 | ||
40 | 4: mov ip, r3, lsr #24 | |
41 | ldr r3, [r1], #4 | |
42 | orr ip, ip, r3, lsl #8 | |
43 | str ip, [r0] | |
44 | subs r2, r2, #1 | |
45 | bne 4b | |
46 | mov pc, lr | |
47 | ||
48 | 5: mov ip, r3, lsr #8 | |
49 | ldr r3, [r1], #4 | |
50 | orr ip, ip, r3, lsl #24 | |
51 | str ip, [r0] | |
52 | subs r2, r2, #1 | |
53 | bne 5b | |
54 | mov pc, lr | |
55 | ||
56 |