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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | /* * Inline functions to do unaligned accesses. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1996 by Ralf Baechle */ #ifndef __ASM_MIPS_UNALIGNED_H #define __ASM_MIPS_UNALIGNED_H #include <asm/string.h> /* * Load quad unaligned. */ extern __inline__ unsigned long ldq_u(const unsigned long long * __addr) { unsigned long long __res; __asm__("uld\t%0,(%1)" :"=&r" (__res) :"r" (__addr)); return __res; } /* * Load long unaligned. */ extern __inline__ unsigned long ldl_u(const unsigned int * __addr) { unsigned long __res; __asm__("ulw\t%0,(%1)" :"=&r" (__res) :"r" (__addr)); return __res; } /* * Load word unaligned. */ extern __inline__ unsigned long ldw_u(const unsigned short * __addr) { unsigned long __res; __asm__("ulh\t%0,(%1)" :"=&r" (__res) :"r" (__addr)); return __res; } /* * Store quad ununaligned. */ extern __inline__ void stq_u(unsigned long __val, unsigned long long * __addr) { __asm__ __volatile__( "usd\t%0,(%1)" : /* No results */ :"r" (__val), "r" (__addr)); } /* * Store long ununaligned. */ extern __inline__ void stl_u(unsigned long __val, unsigned int * __addr) { __asm__ __volatile__( "usw\t%0,(%1)" : /* No results */ :"r" (__val), "r" (__addr)); } /* * Store word ununaligned. */ extern __inline__ void stw_u(unsigned long __val, unsigned short * __addr) { __asm__ __volatile__( "ush\t%0,(%1)" : /* No results */ :"r" (__val), "r" (__addr)); } extern inline unsigned long __get_unaligned(const void *ptr, size_t size) { unsigned long val; switch (size) { case 1: val = *(const unsigned char *)ptr; break; case 2: val = ldw_u((const unsigned short *)ptr); break; case 4: val = ldl_u((const unsigned int *)ptr); break; case 8: val = ldq_u((const unsigned long long *)ptr); break; } return val; } extern inline void __put_unaligned(unsigned long val, void *ptr, size_t size) { switch (size) { case 1: *(unsigned char *)ptr = (val); break; case 2: stw_u(val, (unsigned short *)ptr); break; case 4: stl_u(val, (unsigned int *)ptr); break; case 8: stq_u(val, (unsigned long long *)ptr); break; } } /* * The main single-value unaligned transfer routines. */ #define get_unaligned(ptr) \ ((__typeof__(*(ptr)))__get_unaligned((ptr), sizeof(*(ptr)))) #define put_unaligned(x,ptr) \ __put_unaligned((unsigned long)(x), (ptr), sizeof(*(ptr))) #endif /* __ASM_MIPS_UNALIGNED_H */ |