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authorAurelien Jacquiot <a-jacquiot@ti.com>2011-10-04 11:14:47 -0400
committerMark Salter <msalter@redhat.com>2011-10-06 19:48:20 -0400
commita7f626c1948ab6178d2338831c5ffea7385e9f7f (patch)
tree03eaee71023fa633c24a3d28a30da57b454293ae /arch/c6x/include/asm/unaligned.h
parent52679b2d735492bce02503bafb333da87fae22c2 (diff)
C6X: headers
Original port to early 2.6 kernel using TI COFF toolchain. Brought up to date by Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Signed-off-by: Mark Salter <msalter@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/c6x/include/asm/unaligned.h')
-rw-r--r--arch/c6x/include/asm/unaligned.h170
1 files changed, 170 insertions, 0 deletions
diff --git a/arch/c6x/include/asm/unaligned.h b/arch/c6x/include/asm/unaligned.h
new file mode 100644
index 000000000000..b976cb740eaa
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+++ b/arch/c6x/include/asm/unaligned.h
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1/*
2 * Port on Texas Instruments TMS320C6x architecture
3 *
4 * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
5 * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
6 * Rewritten for 2.6.3x: Mark Salter <msalter@redhat.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#ifndef _ASM_C6X_UNALIGNED_H
13#define _ASM_C6X_UNALIGNED_H
14
15#include <linux/swab.h>
16
17/*
18 * The C64x+ can do unaligned word and dword accesses in hardware
19 * using special load/store instructions.
20 */
21
22static inline u16 get_unaligned_le16(const void *p)
23{
24 const u8 *_p = p;
25 return _p[0] | _p[1] << 8;
26}
27
28static inline u16 get_unaligned_be16(const void *p)
29{
30 const u8 *_p = p;
31 return _p[0] << 8 | _p[1];
32}
33
34static inline void put_unaligned_le16(u16 val, void *p)
35{
36 u8 *_p = p;
37 _p[0] = val;
38 _p[1] = val >> 8;
39}
40
41static inline void put_unaligned_be16(u16 val, void *p)
42{
43 u8 *_p = p;
44 _p[0] = val >> 8;
45 _p[1] = val;
46}
47
48static inline u32 get_unaligned32(const void *p)
49{
50 u32 val = (u32) p;
51 asm (" ldnw .d1t1 *%0,%0\n"
52 " nop 4\n"
53 : "+a"(val));
54 return val;
55}
56
57static inline void put_unaligned32(u32 val, void *p)
58{
59 asm volatile (" stnw .d2t1 %0,*%1\n"
60 : : "a"(val), "b"(p) : "memory");
61}
62
63static inline u64 get_unaligned64(const void *p)
64{
65 u64 val;
66 asm volatile (" ldndw .d1t1 *%1,%0\n"
67 " nop 4\n"
68 : "=a"(val) : "a"(p));
69 return val;
70}
71
72static inline void put_unaligned64(u64 val, const void *p)
73{
74 asm volatile (" stndw .d2t1 %0,*%1\n"
75 : : "a"(val), "b"(p) : "memory");
76}
77
78#ifdef CONFIG_CPU_BIG_ENDIAN
79
80#define get_unaligned_le32(p) __swab32(get_unaligned32(p))
81#define get_unaligned_le64(p) __swab64(get_unaligned64(p))
82#define get_unaligned_be32(p) get_unaligned32(p)
83#define get_unaligned_be64(p) get_unaligned64(p)
84#define put_unaligned_le32(v, p) put_unaligned32(__swab32(v), (p))
85#define put_unaligned_le64(v, p) put_unaligned64(__swab64(v), (p))
86#define put_unaligned_be32(v, p) put_unaligned32((v), (p))
87#define put_unaligned_be64(v, p) put_unaligned64((v), (p))
88#define get_unaligned __get_unaligned_be
89#define put_unaligned __put_unaligned_be
90
91#else
92
93#define get_unaligned_le32(p) get_unaligned32(p)
94#define get_unaligned_le64(p) get_unaligned64(p)
95#define get_unaligned_be32(p) __swab32(get_unaligned32(p))
96#define get_unaligned_be64(p) __swab64(get_unaligned64(p))
97#define put_unaligned_le32(v, p) put_unaligned32((v), (p))
98#define put_unaligned_le64(v, p) put_unaligned64((v), (p))
99#define put_unaligned_be32(v, p) put_unaligned32(__swab32(v), (p))
100#define put_unaligned_be64(v, p) put_unaligned64(__swab64(v), (p))
101#define get_unaligned __get_unaligned_le
102#define put_unaligned __put_unaligned_le
103
104#endif
105
106/*
107 * Cause a link-time error if we try an unaligned access other than
108 * 1,2,4 or 8 bytes long
109 */
110extern int __bad_unaligned_access_size(void);
111
112#define __get_unaligned_le(ptr) (typeof(*(ptr)))({ \
113 sizeof(*(ptr)) == 1 ? *(ptr) : \
114 (sizeof(*(ptr)) == 2 ? get_unaligned_le16((ptr)) : \
115 (sizeof(*(ptr)) == 4 ? get_unaligned_le32((ptr)) : \
116 (sizeof(*(ptr)) == 8 ? get_unaligned_le64((ptr)) : \
117 __bad_unaligned_access_size()))); \
118 })
119
120#define __get_unaligned_be(ptr) (__force typeof(*(ptr)))({ \
121 sizeof(*(ptr)) == 1 ? *(ptr) : \
122 (sizeof(*(ptr)) == 2 ? get_unaligned_be16((ptr)) : \
123 (sizeof(*(ptr)) == 4 ? get_unaligned_be32((ptr)) : \
124 (sizeof(*(ptr)) == 8 ? get_unaligned_be64((ptr)) : \
125 __bad_unaligned_access_size()))); \
126 })
127
128#define __put_unaligned_le(val, ptr) ({ \
129 void *__gu_p = (ptr); \
130 switch (sizeof(*(ptr))) { \
131 case 1: \
132 *(u8 *)__gu_p = (__force u8)(val); \
133 break; \
134 case 2: \
135 put_unaligned_le16((__force u16)(val), __gu_p); \
136 break; \
137 case 4: \
138 put_unaligned_le32((__force u32)(val), __gu_p); \
139 break; \
140 case 8: \
141 put_unaligned_le64((__force u64)(val), __gu_p); \
142 break; \
143 default: \
144 __bad_unaligned_access_size(); \
145 break; \
146 } \
147 (void)0; })
148
149#define __put_unaligned_be(val, ptr) ({ \
150 void *__gu_p = (ptr); \
151 switch (sizeof(*(ptr))) { \
152 case 1: \
153 *(u8 *)__gu_p = (__force u8)(val); \
154 break; \
155 case 2: \
156 put_unaligned_be16((__force u16)(val), __gu_p); \
157 break; \
158 case 4: \
159 put_unaligned_be32((__force u32)(val), __gu_p); \
160 break; \
161 case 8: \
162 put_unaligned_be64((__force u64)(val), __gu_p); \
163 break; \
164 default: \
165 __bad_unaligned_access_size(); \
166 break; \
167 } \
168 (void)0; })
169
170#endif /* _ASM_C6X_UNALIGNED_H */
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