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gerrit-public.fairphone.software / kernel / msm-4.9 / 7f50684717511d30bba180902105c4cd4efca732 / . / arch / arm / lib / io-writesw-armv3.S
blob: cd34503e424d6ef41aa1664be9857619d7563bf8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * linux/arch/arm/lib/io-writesw-armv3.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>
Russell Kinga09e64f2008-08-05 16:14:15 +0100[diff] [blame]12#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]13
Nicolas Pitrea9c48142005-11-11 21:51:48 +0000[diff] [blame]14.Loutsw_bad_alignment:
15 adr r0, .Loutsw_bad_align_msg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]16 mov r2, lr
17 b panic
Nicolas Pitrea9c48142005-11-11 21:51:48 +0000[diff] [blame]18.Loutsw_bad_align_msg:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]19 .asciz "outsw: bad buffer alignment (0x%p, lr=0x%08lX)\n"
20 .align
21
Nicolas Pitrea9c48142005-11-11 21:51:48 +0000[diff] [blame]22.Loutsw_align: tst r1, #1
23 bne .Loutsw_bad_alignment
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]24
25 add r1, r1, #2
26
27 ldr r3, [r1, #-4]
28 mov r3, r3, lsr #16
29 orr r3, r3, r3, lsl #16
30 str r3, [r0]
31 subs r2, r2, #1
Russell King7999d8d2006-06-25 11:17:23 +0100[diff] [blame]32 moveq pc, lr
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]33
34ENTRY(__raw_writesw)
35 teq r2, #0 @ do we have to check for the zero len?
36 moveq pc, lr
37 tst r1, #3
Nicolas Pitrea9c48142005-11-11 21:51:48 +0000[diff] [blame]38 bne .Loutsw_align
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]39
Nicolas Pitrea9c48142005-11-11 21:51:48 +0000[diff] [blame]40 stmfd sp!, {r4, r5, r6, lr}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]41
42 subs r2, r2, #8
Nicolas Pitrea9c48142005-11-11 21:51:48 +0000[diff] [blame]43 bmi .Lno_outsw_8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]44
Nicolas Pitrea9c48142005-11-11 21:51:48 +0000[diff] [blame]45.Loutsw_8_lp: ldmia r1!, {r3, r4, r5, r6}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]46
47 mov ip, r3, lsl #16
48 orr ip, ip, ip, lsr #16
49 str ip, [r0]
50
51 mov ip, r3, lsr #16
52 orr ip, ip, ip, lsl #16
53 str ip, [r0]
54
55 mov ip, r4, lsl #16
56 orr ip, ip, ip, lsr #16
57 str ip, [r0]
58
59 mov ip, r4, lsr #16
60 orr ip, ip, ip, lsl #16
61 str ip, [r0]
62
63 mov ip, r5, lsl #16
64 orr ip, ip, ip, lsr #16
65 str ip, [r0]
66
67 mov ip, r5, lsr #16
68 orr ip, ip, ip, lsl #16
69 str ip, [r0]
70
71 mov ip, r6, lsl #16
72 orr ip, ip, ip, lsr #16
73 str ip, [r0]
74
75 mov ip, r6, lsr #16
76 orr ip, ip, ip, lsl #16
77 str ip, [r0]
78
79 subs r2, r2, #8
Nicolas Pitrea9c48142005-11-11 21:51:48 +0000[diff] [blame]80 bpl .Loutsw_8_lp
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]81
82 tst r2, #7
Russell King1b93a712006-06-25 11:23:45 +0100[diff] [blame]83 ldmeqfd sp!, {r4, r5, r6, pc}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]84
Nicolas Pitrea9c48142005-11-11 21:51:48 +0000[diff] [blame]85.Lno_outsw_8: tst r2, #4
86 beq .Lno_outsw_4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]87
88 ldmia r1!, {r3, r4}
89
90 mov ip, r3, lsl #16
91 orr ip, ip, ip, lsr #16
92 str ip, [r0]
93
94 mov ip, r3, lsr #16
95 orr ip, ip, ip, lsl #16
96 str ip, [r0]
97
98 mov ip, r4, lsl #16
99 orr ip, ip, ip, lsr #16
100 str ip, [r0]
101
102 mov ip, r4, lsr #16
103 orr ip, ip, ip, lsl #16
104 str ip, [r0]
105
Nicolas Pitrea9c48142005-11-11 21:51:48 +0000[diff] [blame]106.Lno_outsw_4: tst r2, #2
107 beq .Lno_outsw_2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]108
109 ldr r3, [r1], #4
110
111 mov ip, r3, lsl #16
112 orr ip, ip, ip, lsr #16
113 str ip, [r0]
114
115 mov ip, r3, lsr #16
116 orr ip, ip, ip, lsl #16
117 str ip, [r0]
118
Nicolas Pitrea9c48142005-11-11 21:51:48 +0000[diff] [blame]119.Lno_outsw_2: tst r2, #1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]120
121 ldrne r3, [r1]
122
123 movne ip, r3, lsl #16
124 orrne ip, ip, ip, lsr #16
125 strne ip, [r0]
126
Russell King1b93a712006-06-25 11:23:45 +0100[diff] [blame]127 ldmfd sp!, {r4, r5, r6, pc}