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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_CSKY_UACCESS_H #define __ASM_CSKY_UACCESS_H /* * __put_user_fn */ extern int __put_user_bad(void); #define __put_user_asm_b(x, ptr, err) \ do { \ int errcode; \ __asm__ __volatile__( \ "1: stb %1, (%2,0) \n" \ " br 3f \n" \ "2: mov %0, %3 \n" \ " br 3f \n" \ ".section __ex_table, \"a\" \n" \ ".align 2 \n" \ ".long 1b,2b \n" \ ".previous \n" \ "3: \n" \ : "=r"(err), "=r"(x), "=r"(ptr), "=r"(errcode) \ : "0"(err), "1"(x), "2"(ptr), "3"(-EFAULT) \ : "memory"); \ } while (0) #define __put_user_asm_h(x, ptr, err) \ do { \ int errcode; \ __asm__ __volatile__( \ "1: sth %1, (%2,0) \n" \ " br 3f \n" \ "2: mov %0, %3 \n" \ " br 3f \n" \ ".section __ex_table, \"a\" \n" \ ".align 2 \n" \ ".long 1b,2b \n" \ ".previous \n" \ "3: \n" \ : "=r"(err), "=r"(x), "=r"(ptr), "=r"(errcode) \ : "0"(err), "1"(x), "2"(ptr), "3"(-EFAULT) \ : "memory"); \ } while (0) #define __put_user_asm_w(x, ptr, err) \ do { \ int errcode; \ __asm__ __volatile__( \ "1: stw %1, (%2,0) \n" \ " br 3f \n" \ "2: mov %0, %3 \n" \ " br 3f \n" \ ".section __ex_table,\"a\" \n" \ ".align 2 \n" \ ".long 1b, 2b \n" \ ".previous \n" \ "3: \n" \ : "=r"(err), "=r"(x), "=r"(ptr), "=r"(errcode) \ : "0"(err), "1"(x), "2"(ptr), "3"(-EFAULT) \ : "memory"); \ } while (0) #define __put_user_asm_64(x, ptr, err) \ do { \ int tmp; \ int errcode; \ \ __asm__ __volatile__( \ " ldw %3, (%1, 0) \n" \ "1: stw %3, (%2, 0) \n" \ " ldw %3, (%1, 4) \n" \ "2: stw %3, (%2, 4) \n" \ " br 4f \n" \ "3: mov %0, %4 \n" \ " br 4f \n" \ ".section __ex_table, \"a\" \n" \ ".align 2 \n" \ ".long 1b, 3b \n" \ ".long 2b, 3b \n" \ ".previous \n" \ "4: \n" \ : "=r"(err), "=r"(x), "=r"(ptr), \ "=r"(tmp), "=r"(errcode) \ : "0"(err), "1"(x), "2"(ptr), "3"(0), \ "4"(-EFAULT) \ : "memory"); \ } while (0) static inline int __put_user_fn(size_t size, void __user *ptr, void *x) { int retval = 0; u32 tmp; switch (size) { case 1: tmp = *(u8 *)x; __put_user_asm_b(tmp, ptr, retval); break; case 2: tmp = *(u16 *)x; __put_user_asm_h(tmp, ptr, retval); break; case 4: tmp = *(u32 *)x; __put_user_asm_w(tmp, ptr, retval); break; case 8: __put_user_asm_64(x, (u64 *)ptr, retval); break; } return retval; } #define __put_user_fn __put_user_fn /* * __get_user_fn */ extern int __get_user_bad(void); #define __get_user_asm_common(x, ptr, ins, err) \ do { \ int errcode; \ __asm__ __volatile__( \ "1: " ins " %1, (%4, 0) \n" \ " br 3f \n" \ "2: mov %0, %2 \n" \ " movi %1, 0 \n" \ " br 3f \n" \ ".section __ex_table,\"a\" \n" \ ".align 2 \n" \ ".long 1b, 2b \n" \ ".previous \n" \ "3: \n" \ : "=r"(err), "=r"(x), "=r"(errcode) \ : "0"(0), "r"(ptr), "2"(-EFAULT) \ : "memory"); \ } while (0) #define __get_user_asm_64(x, ptr, err) \ do { \ int tmp; \ int errcode; \ \ __asm__ __volatile__( \ "1: ldw %3, (%2, 0) \n" \ " stw %3, (%1, 0) \n" \ "2: ldw %3, (%2, 4) \n" \ " stw %3, (%1, 4) \n" \ " br 4f \n" \ "3: mov %0, %4 \n" \ " br 4f \n" \ ".section __ex_table, \"a\" \n" \ ".align 2 \n" \ ".long 1b, 3b \n" \ ".long 2b, 3b \n" \ ".previous \n" \ "4: \n" \ : "=r"(err), "=r"(x), "=r"(ptr), \ "=r"(tmp), "=r"(errcode) \ : "0"(err), "1"(x), "2"(ptr), "3"(0), \ "4"(-EFAULT) \ : "memory"); \ } while (0) static inline int __get_user_fn(size_t size, const void __user *ptr, void *x) { int retval; u32 tmp; switch (size) { case 1: __get_user_asm_common(tmp, ptr, "ldb", retval); *(u8 *)x = (u8)tmp; break; case 2: __get_user_asm_common(tmp, ptr, "ldh", retval); *(u16 *)x = (u16)tmp; break; case 4: __get_user_asm_common(tmp, ptr, "ldw", retval); *(u32 *)x = (u32)tmp; break; case 8: __get_user_asm_64(x, ptr, retval); break; } return retval; } #define __get_user_fn __get_user_fn unsigned long raw_copy_from_user(void *to, const void *from, unsigned long n); unsigned long raw_copy_to_user(void *to, const void *from, unsigned long n); unsigned long __clear_user(void __user *to, unsigned long n); #define __clear_user __clear_user #include <asm-generic/uaccess.h> #endif /* __ASM_CSKY_UACCESS_H */ |