Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __M68K_UACCESS_H |
| 2 | #define __M68K_UACCESS_H |
| 3 | |
| 4 | /* |
| 5 | * User space memory access functions |
| 6 | */ |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 7 | #include <linux/compiler.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | #include <linux/errno.h> |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 9 | #include <linux/types.h> |
Andrew Morton | a0f7b67a | 2007-01-29 13:19:50 -0800 | [diff] [blame] | 10 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <asm/segment.h> |
| 12 | |
| 13 | #define VERIFY_READ 0 |
| 14 | #define VERIFY_WRITE 1 |
| 15 | |
| 16 | /* We let the MMU do all checking */ |
Geert Uytterhoeven | 70f9cac | 2008-05-18 20:47:07 +0200 | [diff] [blame] | 17 | static inline int access_ok(int type, const void __user *addr, |
| 18 | unsigned long size) |
| 19 | { |
| 20 | return 1; |
| 21 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | /* |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 24 | * Not all varients of the 68k family support the notion of address spaces. |
| 25 | * The traditional 680x0 parts do, and they use the sfc/dfc registers and |
| 26 | * the "moves" instruction to access user space from kernel space. Other |
| 27 | * family members like ColdFire don't support this, and only have a single |
| 28 | * address space, and use the usual "move" instruction for user space access. |
| 29 | * |
| 30 | * Outside of this difference the user space access functions are the same. |
| 31 | * So lets keep the code simple and just define in what we need to use. |
| 32 | */ |
| 33 | #ifdef CONFIG_CPU_HAS_ADDRESS_SPACES |
| 34 | #define MOVES "moves" |
| 35 | #else |
| 36 | #define MOVES "move" |
| 37 | #endif |
| 38 | |
| 39 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | * The exception table consists of pairs of addresses: the first is the |
| 41 | * address of an instruction that is allowed to fault, and the second is |
| 42 | * the address at which the program should continue. No registers are |
| 43 | * modified, so it is entirely up to the continuation code to figure out |
| 44 | * what to do. |
| 45 | * |
| 46 | * All the routines below use bits of fixup code that are out of line |
| 47 | * with the main instruction path. This means when everything is well, |
| 48 | * we don't even have to jump over them. Further, they do not intrude |
| 49 | * on our cache or tlb entries. |
| 50 | */ |
| 51 | |
| 52 | struct exception_table_entry |
| 53 | { |
| 54 | unsigned long insn, fixup; |
| 55 | }; |
| 56 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 57 | extern int __put_user_bad(void); |
| 58 | extern int __get_user_bad(void); |
| 59 | |
| 60 | #define __put_user_asm(res, x, ptr, bwl, reg, err) \ |
| 61 | asm volatile ("\n" \ |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 62 | "1: "MOVES"."#bwl" %2,%1\n" \ |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 63 | "2:\n" \ |
| 64 | " .section .fixup,\"ax\"\n" \ |
| 65 | " .even\n" \ |
| 66 | "10: moveq.l %3,%0\n" \ |
| 67 | " jra 2b\n" \ |
| 68 | " .previous\n" \ |
| 69 | "\n" \ |
| 70 | " .section __ex_table,\"a\"\n" \ |
| 71 | " .align 4\n" \ |
| 72 | " .long 1b,10b\n" \ |
| 73 | " .long 2b,10b\n" \ |
| 74 | " .previous" \ |
| 75 | : "+d" (res), "=m" (*(ptr)) \ |
| 76 | : #reg (x), "i" (err)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | /* |
| 79 | * These are the main single-value transfer routines. They automatically |
| 80 | * use the right size if we just have the right pointer type. |
| 81 | */ |
| 82 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 83 | #define __put_user(x, ptr) \ |
| 84 | ({ \ |
| 85 | typeof(*(ptr)) __pu_val = (x); \ |
| 86 | int __pu_err = 0; \ |
| 87 | __chk_user_ptr(ptr); \ |
| 88 | switch (sizeof (*(ptr))) { \ |
| 89 | case 1: \ |
| 90 | __put_user_asm(__pu_err, __pu_val, ptr, b, d, -EFAULT); \ |
| 91 | break; \ |
| 92 | case 2: \ |
| 93 | __put_user_asm(__pu_err, __pu_val, ptr, w, d, -EFAULT); \ |
| 94 | break; \ |
| 95 | case 4: \ |
| 96 | __put_user_asm(__pu_err, __pu_val, ptr, l, r, -EFAULT); \ |
| 97 | break; \ |
| 98 | case 8: \ |
| 99 | { \ |
Al Viro | b971018 | 2006-10-11 17:27:57 +0100 | [diff] [blame] | 100 | const void __user *__pu_ptr = (ptr); \ |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 101 | asm volatile ("\n" \ |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 102 | "1: "MOVES".l %2,(%1)+\n" \ |
| 103 | "2: "MOVES".l %R2,(%1)\n" \ |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 104 | "3:\n" \ |
| 105 | " .section .fixup,\"ax\"\n" \ |
| 106 | " .even\n" \ |
| 107 | "10: movel %3,%0\n" \ |
| 108 | " jra 3b\n" \ |
| 109 | " .previous\n" \ |
| 110 | "\n" \ |
| 111 | " .section __ex_table,\"a\"\n" \ |
| 112 | " .align 4\n" \ |
| 113 | " .long 1b,10b\n" \ |
| 114 | " .long 2b,10b\n" \ |
| 115 | " .long 3b,10b\n" \ |
| 116 | " .previous" \ |
| 117 | : "+d" (__pu_err), "+a" (__pu_ptr) \ |
| 118 | : "r" (__pu_val), "i" (-EFAULT) \ |
| 119 | : "memory"); \ |
| 120 | break; \ |
| 121 | } \ |
| 122 | default: \ |
| 123 | __pu_err = __put_user_bad(); \ |
| 124 | break; \ |
| 125 | } \ |
| 126 | __pu_err; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | }) |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 128 | #define put_user(x, ptr) __put_user(x, ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 131 | #define __get_user_asm(res, x, ptr, type, bwl, reg, err) ({ \ |
| 132 | type __gu_val; \ |
| 133 | asm volatile ("\n" \ |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 134 | "1: "MOVES"."#bwl" %2,%1\n" \ |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 135 | "2:\n" \ |
| 136 | " .section .fixup,\"ax\"\n" \ |
| 137 | " .even\n" \ |
| 138 | "10: move.l %3,%0\n" \ |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 139 | " sub.l %1,%1\n" \ |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 140 | " jra 2b\n" \ |
| 141 | " .previous\n" \ |
| 142 | "\n" \ |
| 143 | " .section __ex_table,\"a\"\n" \ |
| 144 | " .align 4\n" \ |
| 145 | " .long 1b,10b\n" \ |
| 146 | " .previous" \ |
| 147 | : "+d" (res), "=&" #reg (__gu_val) \ |
| 148 | : "m" (*(ptr)), "i" (err)); \ |
Al Viro | b971018 | 2006-10-11 17:27:57 +0100 | [diff] [blame] | 149 | (x) = (typeof(*(ptr)))(unsigned long)__gu_val; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 152 | #define __get_user(x, ptr) \ |
| 153 | ({ \ |
| 154 | int __gu_err = 0; \ |
| 155 | __chk_user_ptr(ptr); \ |
| 156 | switch (sizeof(*(ptr))) { \ |
| 157 | case 1: \ |
| 158 | __get_user_asm(__gu_err, x, ptr, u8, b, d, -EFAULT); \ |
| 159 | break; \ |
| 160 | case 2: \ |
| 161 | __get_user_asm(__gu_err, x, ptr, u16, w, d, -EFAULT); \ |
| 162 | break; \ |
| 163 | case 4: \ |
| 164 | __get_user_asm(__gu_err, x, ptr, u32, l, r, -EFAULT); \ |
| 165 | break; \ |
| 166 | /* case 8: disabled because gcc-4.1 has a broken typeof \ |
| 167 | { \ |
| 168 | const void *__gu_ptr = (ptr); \ |
| 169 | u64 __gu_val; \ |
| 170 | asm volatile ("\n" \ |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 171 | "1: "MOVES".l (%2)+,%1\n" \ |
| 172 | "2: "MOVES".l (%2),%R1\n" \ |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 173 | "3:\n" \ |
| 174 | " .section .fixup,\"ax\"\n" \ |
| 175 | " .even\n" \ |
| 176 | "10: move.l %3,%0\n" \ |
| 177 | " sub.l %1,%1\n" \ |
| 178 | " sub.l %R1,%R1\n" \ |
| 179 | " jra 3b\n" \ |
| 180 | " .previous\n" \ |
| 181 | "\n" \ |
| 182 | " .section __ex_table,\"a\"\n" \ |
| 183 | " .align 4\n" \ |
| 184 | " .long 1b,10b\n" \ |
| 185 | " .long 2b,10b\n" \ |
| 186 | " .previous" \ |
| 187 | : "+d" (__gu_err), "=&r" (__gu_val), \ |
| 188 | "+a" (__gu_ptr) \ |
| 189 | : "i" (-EFAULT) \ |
| 190 | : "memory"); \ |
| 191 | (x) = (typeof(*(ptr)))__gu_val; \ |
| 192 | break; \ |
| 193 | } */ \ |
| 194 | default: \ |
| 195 | __gu_err = __get_user_bad(); \ |
| 196 | break; \ |
| 197 | } \ |
| 198 | __gu_err; \ |
| 199 | }) |
| 200 | #define get_user(x, ptr) __get_user(x, ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 202 | unsigned long __generic_copy_from_user(void *to, const void __user *from, unsigned long n); |
| 203 | unsigned long __generic_copy_to_user(void __user *to, const void *from, unsigned long n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 205 | #define __constant_copy_from_user_asm(res, to, from, tmp, n, s1, s2, s3)\ |
| 206 | asm volatile ("\n" \ |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 207 | "1: "MOVES"."#s1" (%2)+,%3\n" \ |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 208 | " move."#s1" %3,(%1)+\n" \ |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 209 | "2: "MOVES"."#s2" (%2)+,%3\n" \ |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 210 | " move."#s2" %3,(%1)+\n" \ |
| 211 | " .ifnc \""#s3"\",\"\"\n" \ |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 212 | "3: "MOVES"."#s3" (%2)+,%3\n" \ |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 213 | " move."#s3" %3,(%1)+\n" \ |
| 214 | " .endif\n" \ |
| 215 | "4:\n" \ |
| 216 | " .section __ex_table,\"a\"\n" \ |
| 217 | " .align 4\n" \ |
| 218 | " .long 1b,10f\n" \ |
| 219 | " .long 2b,20f\n" \ |
| 220 | " .ifnc \""#s3"\",\"\"\n" \ |
| 221 | " .long 3b,30f\n" \ |
| 222 | " .endif\n" \ |
| 223 | " .previous\n" \ |
| 224 | "\n" \ |
| 225 | " .section .fixup,\"ax\"\n" \ |
| 226 | " .even\n" \ |
| 227 | "10: clr."#s1" (%1)+\n" \ |
| 228 | "20: clr."#s2" (%1)+\n" \ |
| 229 | " .ifnc \""#s3"\",\"\"\n" \ |
| 230 | "30: clr."#s3" (%1)+\n" \ |
| 231 | " .endif\n" \ |
| 232 | " moveq.l #"#n",%0\n" \ |
| 233 | " jra 4b\n" \ |
| 234 | " .previous\n" \ |
| 235 | : "+d" (res), "+&a" (to), "+a" (from), "=&d" (tmp) \ |
| 236 | : : "memory") |
| 237 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 238 | static __always_inline unsigned long |
Al Viro | 11c40f8 | 2006-01-12 01:06:24 -0800 | [diff] [blame] | 239 | __constant_copy_from_user(void *to, const void __user *from, unsigned long n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | { |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 241 | unsigned long res = 0, tmp; |
| 242 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 243 | switch (n) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | case 1: |
Al Viro | b971018 | 2006-10-11 17:27:57 +0100 | [diff] [blame] | 245 | __get_user_asm(res, *(u8 *)to, (u8 __user *)from, u8, b, d, 1); |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 246 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | case 2: |
Al Viro | b971018 | 2006-10-11 17:27:57 +0100 | [diff] [blame] | 248 | __get_user_asm(res, *(u16 *)to, (u16 __user *)from, u16, w, d, 2); |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 249 | break; |
| 250 | case 3: |
| 251 | __constant_copy_from_user_asm(res, to, from, tmp, 3, w, b,); |
| 252 | break; |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 253 | case 4: |
Al Viro | b971018 | 2006-10-11 17:27:57 +0100 | [diff] [blame] | 254 | __get_user_asm(res, *(u32 *)to, (u32 __user *)from, u32, l, r, 4); |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 255 | break; |
| 256 | case 5: |
| 257 | __constant_copy_from_user_asm(res, to, from, tmp, 5, l, b,); |
| 258 | break; |
| 259 | case 6: |
| 260 | __constant_copy_from_user_asm(res, to, from, tmp, 6, l, w,); |
| 261 | break; |
| 262 | case 7: |
| 263 | __constant_copy_from_user_asm(res, to, from, tmp, 7, l, w, b); |
| 264 | break; |
| 265 | case 8: |
| 266 | __constant_copy_from_user_asm(res, to, from, tmp, 8, l, l,); |
| 267 | break; |
| 268 | case 9: |
| 269 | __constant_copy_from_user_asm(res, to, from, tmp, 9, l, l, b); |
| 270 | break; |
| 271 | case 10: |
| 272 | __constant_copy_from_user_asm(res, to, from, tmp, 10, l, l, w); |
| 273 | break; |
| 274 | case 12: |
| 275 | __constant_copy_from_user_asm(res, to, from, tmp, 12, l, l, l); |
| 276 | break; |
| 277 | default: |
| 278 | /* we limit the inlined version to 3 moves */ |
| 279 | return __generic_copy_from_user(to, from, n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 281 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 282 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | } |
| 284 | |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 285 | #define __constant_copy_to_user_asm(res, to, from, tmp, n, s1, s2, s3) \ |
| 286 | asm volatile ("\n" \ |
| 287 | " move."#s1" (%2)+,%3\n" \ |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 288 | "11: "MOVES"."#s1" %3,(%1)+\n" \ |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 289 | "12: move."#s2" (%2)+,%3\n" \ |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 290 | "21: "MOVES"."#s2" %3,(%1)+\n" \ |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 291 | "22:\n" \ |
| 292 | " .ifnc \""#s3"\",\"\"\n" \ |
| 293 | " move."#s3" (%2)+,%3\n" \ |
Greg Ungerer | e08d703 | 2011-10-14 14:43:30 +1000 | [diff] [blame] | 294 | "31: "MOVES"."#s3" %3,(%1)+\n" \ |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 295 | "32:\n" \ |
| 296 | " .endif\n" \ |
| 297 | "4:\n" \ |
| 298 | "\n" \ |
| 299 | " .section __ex_table,\"a\"\n" \ |
| 300 | " .align 4\n" \ |
| 301 | " .long 11b,5f\n" \ |
| 302 | " .long 12b,5f\n" \ |
| 303 | " .long 21b,5f\n" \ |
| 304 | " .long 22b,5f\n" \ |
| 305 | " .ifnc \""#s3"\",\"\"\n" \ |
| 306 | " .long 31b,5f\n" \ |
| 307 | " .long 32b,5f\n" \ |
| 308 | " .endif\n" \ |
| 309 | " .previous\n" \ |
| 310 | "\n" \ |
| 311 | " .section .fixup,\"ax\"\n" \ |
| 312 | " .even\n" \ |
| 313 | "5: moveq.l #"#n",%0\n" \ |
| 314 | " jra 4b\n" \ |
| 315 | " .previous\n" \ |
| 316 | : "+d" (res), "+a" (to), "+a" (from), "=&d" (tmp) \ |
| 317 | : : "memory") |
| 318 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 319 | static __always_inline unsigned long |
Al Viro | 11c40f8 | 2006-01-12 01:06:24 -0800 | [diff] [blame] | 320 | __constant_copy_to_user(void __user *to, const void *from, unsigned long n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | { |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 322 | unsigned long res = 0, tmp; |
| 323 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 324 | switch (n) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | case 1: |
Al Viro | b971018 | 2006-10-11 17:27:57 +0100 | [diff] [blame] | 326 | __put_user_asm(res, *(u8 *)from, (u8 __user *)to, b, d, 1); |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 327 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | case 2: |
Al Viro | b971018 | 2006-10-11 17:27:57 +0100 | [diff] [blame] | 329 | __put_user_asm(res, *(u16 *)from, (u16 __user *)to, w, d, 2); |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 330 | break; |
| 331 | case 3: |
| 332 | __constant_copy_to_user_asm(res, to, from, tmp, 3, w, b,); |
| 333 | break; |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 334 | case 4: |
Al Viro | b971018 | 2006-10-11 17:27:57 +0100 | [diff] [blame] | 335 | __put_user_asm(res, *(u32 *)from, (u32 __user *)to, l, r, 4); |
Roman Zippel | 5361782 | 2006-06-25 05:46:53 -0700 | [diff] [blame] | 336 | break; |
| 337 | case 5: |
| 338 | __constant_copy_to_user_asm(res, to, from, tmp, 5, l, b,); |
| 339 | break; |
| 340 | case 6: |
| 341 | __constant_copy_to_user_asm(res, to, from, tmp, 6, l, w,); |
| 342 | break; |
| 343 | case 7: |
| 344 | __constant_copy_to_user_asm(res, to, from, tmp, 7, l, w, b); |
| 345 | break; |
| 346 | case 8: |
| 347 | __constant_copy_to_user_asm(res, to, from, tmp, 8, l, l,); |
| 348 | break; |
| 349 | case 9: |
| 350 | __constant_copy_to_user_asm(res, to, from, tmp, 9, l, l, b); |
| 351 | break; |
| 352 | case 10: |
| 353 | __constant_copy_to_user_asm(res, to, from, tmp, 10, l, l, w); |
| 354 | break; |
| 355 | case 12: |
| 356 | __constant_copy_to_user_asm(res, to, from, tmp, 12, l, l, l); |
| 357 | break; |
| 358 | default: |
| 359 | /* limit the inlined version to 3 moves */ |
| 360 | return __generic_copy_to_user(to, from, n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 362 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 363 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | } |
| 365 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 366 | #define __copy_from_user(to, from, n) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | (__builtin_constant_p(n) ? \ |
| 368 | __constant_copy_from_user(to, from, n) : \ |
| 369 | __generic_copy_from_user(to, from, n)) |
| 370 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 371 | #define __copy_to_user(to, from, n) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | (__builtin_constant_p(n) ? \ |
| 373 | __constant_copy_to_user(to, from, n) : \ |
| 374 | __generic_copy_to_user(to, from, n)) |
| 375 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 376 | #define __copy_to_user_inatomic __copy_to_user |
| 377 | #define __copy_from_user_inatomic __copy_from_user |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 379 | #define copy_from_user(to, from, n) __copy_from_user(to, from, n) |
| 380 | #define copy_to_user(to, from, n) __copy_to_user(to, from, n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
Roman Zippel | d94af93 | 2006-06-23 02:05:00 -0700 | [diff] [blame] | 382 | long strncpy_from_user(char *dst, const char __user *src, long count); |
| 383 | long strnlen_user(const char __user *src, long n); |
Geert Uytterhoeven | 3c46bdc | 2007-05-15 01:41:29 -0700 | [diff] [blame] | 384 | unsigned long __clear_user(void __user *to, unsigned long n); |
| 385 | |
| 386 | #define clear_user __clear_user |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
| 388 | #define strlen_user(str) strnlen_user(str, 32767) |
| 389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | #endif /* _M68K_UACCESS_H */ |