| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 | |