diff options
Diffstat (limited to 'include/asm-generic/unaligned.h')
| -rw-r--r-- | include/asm-generic/unaligned.h | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h deleted file mode 100644 index 2fe1b2e67f01..000000000000 --- a/include/asm-generic/unaligned.h +++ /dev/null | |||
| @@ -1,124 +0,0 @@ | |||
| 1 | #ifndef _ASM_GENERIC_UNALIGNED_H_ | ||
| 2 | #define _ASM_GENERIC_UNALIGNED_H_ | ||
| 3 | |||
| 4 | /* | ||
| 5 | * For the benefit of those who are trying to port Linux to another | ||
| 6 | * architecture, here are some C-language equivalents. | ||
| 7 | * | ||
| 8 | * This is based almost entirely upon Richard Henderson's | ||
| 9 | * asm-alpha/unaligned.h implementation. Some comments were | ||
| 10 | * taken from David Mosberger's asm-ia64/unaligned.h header. | ||
| 11 | */ | ||
| 12 | |||
| 13 | #include <linux/types.h> | ||
| 14 | |||
| 15 | /* | ||
| 16 | * The main single-value unaligned transfer routines. | ||
| 17 | */ | ||
| 18 | #define get_unaligned(ptr) \ | ||
| 19 | __get_unaligned((ptr), sizeof(*(ptr))) | ||
| 20 | #define put_unaligned(x,ptr) \ | ||
| 21 | ((void)sizeof(*(ptr)=(x)),\ | ||
| 22 | __put_unaligned((__force __u64)(x), (ptr), sizeof(*(ptr)))) | ||
| 23 | |||
| 24 | /* | ||
| 25 | * This function doesn't actually exist. The idea is that when | ||
| 26 | * someone uses the macros below with an unsupported size (datatype), | ||
| 27 | * the linker will alert us to the problem via an unresolved reference | ||
| 28 | * error. | ||
| 29 | */ | ||
| 30 | extern void bad_unaligned_access_length(void) __attribute__((noreturn)); | ||
| 31 | |||
| 32 | struct __una_u64 { __u64 x __attribute__((packed)); }; | ||
| 33 | struct __una_u32 { __u32 x __attribute__((packed)); }; | ||
| 34 | struct __una_u16 { __u16 x __attribute__((packed)); }; | ||
| 35 | |||
| 36 | /* | ||
| 37 | * Elemental unaligned loads | ||
| 38 | */ | ||
| 39 | |||
| 40 | static inline __u64 __uldq(const __u64 *addr) | ||
| 41 | { | ||
| 42 | const struct __una_u64 *ptr = (const struct __una_u64 *) addr; | ||
| 43 | return ptr->x; | ||
| 44 | } | ||
| 45 | |||
| 46 | static inline __u32 __uldl(const __u32 *addr) | ||
| 47 | { | ||
| 48 | const struct __una_u32 *ptr = (const struct __una_u32 *) addr; | ||
| 49 | return ptr->x; | ||
| 50 | } | ||
| 51 | |||
| 52 | static inline __u16 __uldw(const __u16 *addr) | ||
| 53 | { | ||
| 54 | const struct __una_u16 *ptr = (const struct __una_u16 *) addr; | ||
| 55 | return ptr->x; | ||
| 56 | } | ||
| 57 | |||
| 58 | /* | ||
| 59 | * Elemental unaligned stores | ||
| 60 | */ | ||
| 61 | |||
| 62 | static inline void __ustq(__u64 val, __u64 *addr) | ||
| 63 | { | ||
| 64 | struct __una_u64 *ptr = (struct __una_u64 *) addr; | ||
| 65 | ptr->x = val; | ||
| 66 | } | ||
| 67 | |||
| 68 | static inline void __ustl(__u32 val, __u32 *addr) | ||
| 69 | { | ||
| 70 | struct __una_u32 *ptr = (struct __una_u32 *) addr; | ||
| 71 | ptr->x = val; | ||
| 72 | } | ||
| 73 | |||
| 74 | static inline void __ustw(__u16 val, __u16 *addr) | ||
| 75 | { | ||
| 76 | struct __una_u16 *ptr = (struct __una_u16 *) addr; | ||
| 77 | ptr->x = val; | ||
| 78 | } | ||
| 79 | |||
| 80 | #define __get_unaligned(ptr, size) ({ \ | ||
| 81 | const void *__gu_p = ptr; \ | ||
| 82 | __u64 __val; \ | ||
| 83 | switch (size) { \ | ||
| 84 | case 1: \ | ||
| 85 | __val = *(const __u8 *)__gu_p; \ | ||
| 86 | break; \ | ||
| 87 | case 2: \ | ||
| 88 | __val = __uldw(__gu_p); \ | ||
| 89 | break; \ | ||
| 90 | case 4: \ | ||
| 91 | __val = __uldl(__gu_p); \ | ||
| 92 | break; \ | ||
| 93 | case 8: \ | ||
| 94 | __val = __uldq(__gu_p); \ | ||
| 95 | break; \ | ||
| 96 | default: \ | ||
| 97 | bad_unaligned_access_length(); \ | ||
| 98 | }; \ | ||
| 99 | (__force __typeof__(*(ptr)))__val; \ | ||
| 100 | }) | ||
| 101 | |||
| 102 | #define __put_unaligned(val, ptr, size) \ | ||
| 103 | ({ \ | ||
| 104 | void *__gu_p = ptr; \ | ||
| 105 | switch (size) { \ | ||
| 106 | case 1: \ | ||
| 107 | *(__u8 *)__gu_p = (__force __u8)val; \ | ||
| 108 | break; \ | ||
| 109 | case 2: \ | ||
| 110 | __ustw((__force __u16)val, __gu_p); \ | ||
| 111 | break; \ | ||
| 112 | case 4: \ | ||
| 113 | __ustl((__force __u32)val, __gu_p); \ | ||
| 114 | break; \ | ||
| 115 | case 8: \ | ||
| 116 | __ustq(val, __gu_p); \ | ||
| 117 | break; \ | ||
| 118 | default: \ | ||
| 119 | bad_unaligned_access_length(); \ | ||
| 120 | }; \ | ||
| 121 | (void)0; \ | ||
| 122 | }) | ||
| 123 | |||
| 124 | #endif /* _ASM_GENERIC_UNALIGNED_H */ | ||
