Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/m68k/kernel/sys_m68k.c |
| 3 | * |
| 4 | * This file contains various random system calls that |
| 5 | * have a non-standard calling sequence on the Linux/m68k |
| 6 | * platform. |
| 7 | */ |
| 8 | |
Randy Dunlap | a941564 | 2006-01-11 12:17:48 -0800 | [diff] [blame] | 9 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/errno.h> |
| 11 | #include <linux/sched.h> |
| 12 | #include <linux/mm.h> |
Alexey Dobriyan | 4e950f6 | 2007-07-30 02:36:13 +0400 | [diff] [blame] | 13 | #include <linux/fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/smp.h> |
| 15 | #include <linux/smp_lock.h> |
| 16 | #include <linux/sem.h> |
| 17 | #include <linux/msg.h> |
| 18 | #include <linux/shm.h> |
| 19 | #include <linux/stat.h> |
| 20 | #include <linux/syscalls.h> |
| 21 | #include <linux/mman.h> |
| 22 | #include <linux/file.h> |
| 23 | #include <linux/utsname.h> |
Adrian Bunk | cba4fbb | 2007-10-16 23:29:24 -0700 | [diff] [blame] | 24 | #include <linux/ipc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
| 26 | #include <asm/setup.h> |
| 27 | #include <asm/uaccess.h> |
| 28 | #include <asm/cachectl.h> |
| 29 | #include <asm/traps.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <asm/page.h> |
Arnd Bergmann | fe74290 | 2006-10-02 02:18:34 -0700 | [diff] [blame] | 31 | #include <asm/unistd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | /* |
| 34 | * sys_pipe() is the normal C calling standard for creating |
| 35 | * a pipe. It's not the way unix traditionally does this, though. |
| 36 | */ |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 37 | asmlinkage int sys_pipe(unsigned long __user * fildes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | { |
| 39 | int fd[2]; |
| 40 | int error; |
| 41 | |
| 42 | error = do_pipe(fd); |
| 43 | if (!error) { |
| 44 | if (copy_to_user(fildes, fd, 2*sizeof(int))) |
| 45 | error = -EFAULT; |
| 46 | } |
| 47 | return error; |
| 48 | } |
| 49 | |
| 50 | /* common code for old and new mmaps */ |
| 51 | static inline long do_mmap2( |
| 52 | unsigned long addr, unsigned long len, |
| 53 | unsigned long prot, unsigned long flags, |
| 54 | unsigned long fd, unsigned long pgoff) |
| 55 | { |
| 56 | int error = -EBADF; |
| 57 | struct file * file = NULL; |
| 58 | |
| 59 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); |
| 60 | if (!(flags & MAP_ANONYMOUS)) { |
| 61 | file = fget(fd); |
| 62 | if (!file) |
| 63 | goto out; |
| 64 | } |
| 65 | |
| 66 | down_write(¤t->mm->mmap_sem); |
| 67 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); |
| 68 | up_write(¤t->mm->mmap_sem); |
| 69 | |
| 70 | if (file) |
| 71 | fput(file); |
| 72 | out: |
| 73 | return error; |
| 74 | } |
| 75 | |
| 76 | asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, |
| 77 | unsigned long prot, unsigned long flags, |
| 78 | unsigned long fd, unsigned long pgoff) |
| 79 | { |
| 80 | return do_mmap2(addr, len, prot, flags, fd, pgoff); |
| 81 | } |
| 82 | |
| 83 | /* |
| 84 | * Perform the select(nd, in, out, ex, tv) and mmap() system |
| 85 | * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to |
| 86 | * handle more than 4 system call parameters, so these system calls |
| 87 | * used a memory block for parameter passing.. |
| 88 | */ |
| 89 | |
| 90 | struct mmap_arg_struct { |
| 91 | unsigned long addr; |
| 92 | unsigned long len; |
| 93 | unsigned long prot; |
| 94 | unsigned long flags; |
| 95 | unsigned long fd; |
| 96 | unsigned long offset; |
| 97 | }; |
| 98 | |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 99 | asmlinkage int old_mmap(struct mmap_arg_struct __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | { |
| 101 | struct mmap_arg_struct a; |
| 102 | int error = -EFAULT; |
| 103 | |
| 104 | if (copy_from_user(&a, arg, sizeof(a))) |
| 105 | goto out; |
| 106 | |
| 107 | error = -EINVAL; |
| 108 | if (a.offset & ~PAGE_MASK) |
| 109 | goto out; |
| 110 | |
| 111 | a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); |
| 112 | |
| 113 | error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT); |
| 114 | out: |
| 115 | return error; |
| 116 | } |
| 117 | |
| 118 | #if 0 |
| 119 | struct mmap_arg_struct64 { |
| 120 | __u32 addr; |
| 121 | __u32 len; |
| 122 | __u32 prot; |
| 123 | __u32 flags; |
| 124 | __u64 offset; /* 64 bits */ |
| 125 | __u32 fd; |
| 126 | }; |
| 127 | |
| 128 | asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg) |
| 129 | { |
| 130 | int error = -EFAULT; |
| 131 | struct file * file = NULL; |
| 132 | struct mmap_arg_struct64 a; |
| 133 | unsigned long pgoff; |
| 134 | |
| 135 | if (copy_from_user(&a, arg, sizeof(a))) |
| 136 | return -EFAULT; |
| 137 | |
| 138 | if ((long)a.offset & ~PAGE_MASK) |
| 139 | return -EINVAL; |
| 140 | |
| 141 | pgoff = a.offset >> PAGE_SHIFT; |
| 142 | if ((a.offset >> PAGE_SHIFT) != pgoff) |
| 143 | return -EINVAL; |
| 144 | |
| 145 | if (!(a.flags & MAP_ANONYMOUS)) { |
| 146 | error = -EBADF; |
| 147 | file = fget(a.fd); |
| 148 | if (!file) |
| 149 | goto out; |
| 150 | } |
| 151 | a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); |
| 152 | |
| 153 | down_write(¤t->mm->mmap_sem); |
| 154 | error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff); |
| 155 | up_write(¤t->mm->mmap_sem); |
| 156 | if (file) |
| 157 | fput(file); |
| 158 | out: |
| 159 | return error; |
| 160 | } |
| 161 | #endif |
| 162 | |
| 163 | struct sel_arg_struct { |
| 164 | unsigned long n; |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 165 | fd_set __user *inp, *outp, *exp; |
| 166 | struct timeval __user *tvp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | }; |
| 168 | |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 169 | asmlinkage int old_select(struct sel_arg_struct __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | { |
| 171 | struct sel_arg_struct a; |
| 172 | |
| 173 | if (copy_from_user(&a, arg, sizeof(a))) |
| 174 | return -EFAULT; |
| 175 | /* sys_select() does the appropriate kernel locking */ |
| 176 | return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp); |
| 177 | } |
| 178 | |
| 179 | /* |
| 180 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. |
| 181 | * |
| 182 | * This is really horribly ugly. |
| 183 | */ |
| 184 | asmlinkage int sys_ipc (uint call, int first, int second, |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 185 | int third, void __user *ptr, long fifth) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | { |
| 187 | int version, ret; |
| 188 | |
| 189 | version = call >> 16; /* hack for backward compatibility */ |
| 190 | call &= 0xffff; |
| 191 | |
| 192 | if (call <= SEMCTL) |
| 193 | switch (call) { |
| 194 | case SEMOP: |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 195 | return sys_semop (first, ptr, second); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | case SEMGET: |
| 197 | return sys_semget (first, second, third); |
| 198 | case SEMCTL: { |
| 199 | union semun fourth; |
| 200 | if (!ptr) |
| 201 | return -EINVAL; |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 202 | if (get_user(fourth.__pad, (void __user *__user *) ptr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | return -EFAULT; |
| 204 | return sys_semctl (first, second, third, fourth); |
| 205 | } |
| 206 | default: |
| 207 | return -ENOSYS; |
| 208 | } |
| 209 | if (call <= MSGCTL) |
| 210 | switch (call) { |
| 211 | case MSGSND: |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 212 | return sys_msgsnd (first, ptr, second, third); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | case MSGRCV: |
| 214 | switch (version) { |
| 215 | case 0: { |
| 216 | struct ipc_kludge tmp; |
| 217 | if (!ptr) |
| 218 | return -EINVAL; |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 219 | if (copy_from_user (&tmp, ptr, sizeof (tmp))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | return -EFAULT; |
| 221 | return sys_msgrcv (first, tmp.msgp, second, |
| 222 | tmp.msgtyp, third); |
| 223 | } |
| 224 | default: |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 225 | return sys_msgrcv (first, ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | second, fifth, third); |
| 227 | } |
| 228 | case MSGGET: |
| 229 | return sys_msgget ((key_t) first, second); |
| 230 | case MSGCTL: |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 231 | return sys_msgctl (first, second, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | default: |
| 233 | return -ENOSYS; |
| 234 | } |
| 235 | if (call <= SHMCTL) |
| 236 | switch (call) { |
| 237 | case SHMAT: |
| 238 | switch (version) { |
| 239 | default: { |
| 240 | ulong raddr; |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 241 | ret = do_shmat (first, ptr, second, &raddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | if (ret) |
| 243 | return ret; |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 244 | return put_user (raddr, (ulong __user *) third); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |
| 246 | } |
| 247 | case SHMDT: |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 248 | return sys_shmdt (ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | case SHMGET: |
| 250 | return sys_shmget (first, second, third); |
| 251 | case SHMCTL: |
Al Viro | 350c20a | 2006-01-12 01:06:27 -0800 | [diff] [blame] | 252 | return sys_shmctl (first, second, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | default: |
| 254 | return -ENOSYS; |
| 255 | } |
| 256 | |
| 257 | return -EINVAL; |
| 258 | } |
| 259 | |
| 260 | /* Convert virtual (user) address VADDR to physical address PADDR */ |
| 261 | #define virt_to_phys_040(vaddr) \ |
| 262 | ({ \ |
| 263 | unsigned long _mmusr, _paddr; \ |
| 264 | \ |
| 265 | __asm__ __volatile__ (".chip 68040\n\t" \ |
| 266 | "ptestr (%1)\n\t" \ |
| 267 | "movec %%mmusr,%0\n\t" \ |
| 268 | ".chip 68k" \ |
| 269 | : "=r" (_mmusr) \ |
| 270 | : "a" (vaddr)); \ |
| 271 | _paddr = (_mmusr & MMU_R_040) ? (_mmusr & PAGE_MASK) : 0; \ |
| 272 | _paddr; \ |
| 273 | }) |
| 274 | |
| 275 | static inline int |
| 276 | cache_flush_040 (unsigned long addr, int scope, int cache, unsigned long len) |
| 277 | { |
| 278 | unsigned long paddr, i; |
| 279 | |
| 280 | switch (scope) |
| 281 | { |
| 282 | case FLUSH_SCOPE_ALL: |
| 283 | switch (cache) |
| 284 | { |
| 285 | case FLUSH_CACHE_DATA: |
| 286 | /* This nop is needed for some broken versions of the 68040. */ |
| 287 | __asm__ __volatile__ ("nop\n\t" |
| 288 | ".chip 68040\n\t" |
| 289 | "cpusha %dc\n\t" |
| 290 | ".chip 68k"); |
| 291 | break; |
| 292 | case FLUSH_CACHE_INSN: |
| 293 | __asm__ __volatile__ ("nop\n\t" |
| 294 | ".chip 68040\n\t" |
| 295 | "cpusha %ic\n\t" |
| 296 | ".chip 68k"); |
| 297 | break; |
| 298 | default: |
| 299 | case FLUSH_CACHE_BOTH: |
| 300 | __asm__ __volatile__ ("nop\n\t" |
| 301 | ".chip 68040\n\t" |
| 302 | "cpusha %bc\n\t" |
| 303 | ".chip 68k"); |
| 304 | break; |
| 305 | } |
| 306 | break; |
| 307 | |
| 308 | case FLUSH_SCOPE_LINE: |
| 309 | /* Find the physical address of the first mapped page in the |
| 310 | address range. */ |
| 311 | if ((paddr = virt_to_phys_040(addr))) { |
| 312 | paddr += addr & ~(PAGE_MASK | 15); |
| 313 | len = (len + (addr & 15) + 15) >> 4; |
| 314 | } else { |
| 315 | unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK); |
| 316 | |
| 317 | if (len <= tmp) |
| 318 | return 0; |
| 319 | addr += tmp; |
| 320 | len -= tmp; |
| 321 | tmp = PAGE_SIZE; |
| 322 | for (;;) |
| 323 | { |
| 324 | if ((paddr = virt_to_phys_040(addr))) |
| 325 | break; |
| 326 | if (len <= tmp) |
| 327 | return 0; |
| 328 | addr += tmp; |
| 329 | len -= tmp; |
| 330 | } |
| 331 | len = (len + 15) >> 4; |
| 332 | } |
| 333 | i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4; |
| 334 | while (len--) |
| 335 | { |
| 336 | switch (cache) |
| 337 | { |
| 338 | case FLUSH_CACHE_DATA: |
| 339 | __asm__ __volatile__ ("nop\n\t" |
| 340 | ".chip 68040\n\t" |
| 341 | "cpushl %%dc,(%0)\n\t" |
| 342 | ".chip 68k" |
| 343 | : : "a" (paddr)); |
| 344 | break; |
| 345 | case FLUSH_CACHE_INSN: |
| 346 | __asm__ __volatile__ ("nop\n\t" |
| 347 | ".chip 68040\n\t" |
| 348 | "cpushl %%ic,(%0)\n\t" |
| 349 | ".chip 68k" |
| 350 | : : "a" (paddr)); |
| 351 | break; |
| 352 | default: |
| 353 | case FLUSH_CACHE_BOTH: |
| 354 | __asm__ __volatile__ ("nop\n\t" |
| 355 | ".chip 68040\n\t" |
| 356 | "cpushl %%bc,(%0)\n\t" |
| 357 | ".chip 68k" |
| 358 | : : "a" (paddr)); |
| 359 | break; |
| 360 | } |
| 361 | if (!--i && len) |
| 362 | { |
| 363 | /* |
| 364 | * No need to page align here since it is done by |
| 365 | * virt_to_phys_040(). |
| 366 | */ |
| 367 | addr += PAGE_SIZE; |
| 368 | i = PAGE_SIZE / 16; |
| 369 | /* Recompute physical address when crossing a page |
| 370 | boundary. */ |
| 371 | for (;;) |
| 372 | { |
| 373 | if ((paddr = virt_to_phys_040(addr))) |
| 374 | break; |
| 375 | if (len <= i) |
| 376 | return 0; |
| 377 | len -= i; |
| 378 | addr += PAGE_SIZE; |
| 379 | } |
| 380 | } |
| 381 | else |
| 382 | paddr += 16; |
| 383 | } |
| 384 | break; |
| 385 | |
| 386 | default: |
| 387 | case FLUSH_SCOPE_PAGE: |
| 388 | len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1); |
| 389 | for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE) |
| 390 | { |
| 391 | if (!(paddr = virt_to_phys_040(addr))) |
| 392 | continue; |
| 393 | switch (cache) |
| 394 | { |
| 395 | case FLUSH_CACHE_DATA: |
| 396 | __asm__ __volatile__ ("nop\n\t" |
| 397 | ".chip 68040\n\t" |
| 398 | "cpushp %%dc,(%0)\n\t" |
| 399 | ".chip 68k" |
| 400 | : : "a" (paddr)); |
| 401 | break; |
| 402 | case FLUSH_CACHE_INSN: |
| 403 | __asm__ __volatile__ ("nop\n\t" |
| 404 | ".chip 68040\n\t" |
| 405 | "cpushp %%ic,(%0)\n\t" |
| 406 | ".chip 68k" |
| 407 | : : "a" (paddr)); |
| 408 | break; |
| 409 | default: |
| 410 | case FLUSH_CACHE_BOTH: |
| 411 | __asm__ __volatile__ ("nop\n\t" |
| 412 | ".chip 68040\n\t" |
| 413 | "cpushp %%bc,(%0)\n\t" |
| 414 | ".chip 68k" |
| 415 | : : "a" (paddr)); |
| 416 | break; |
| 417 | } |
| 418 | } |
| 419 | break; |
| 420 | } |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | #define virt_to_phys_060(vaddr) \ |
| 425 | ({ \ |
| 426 | unsigned long paddr; \ |
| 427 | __asm__ __volatile__ (".chip 68060\n\t" \ |
| 428 | "plpar (%0)\n\t" \ |
| 429 | ".chip 68k" \ |
| 430 | : "=a" (paddr) \ |
| 431 | : "0" (vaddr)); \ |
| 432 | (paddr); /* XXX */ \ |
| 433 | }) |
| 434 | |
| 435 | static inline int |
| 436 | cache_flush_060 (unsigned long addr, int scope, int cache, unsigned long len) |
| 437 | { |
| 438 | unsigned long paddr, i; |
| 439 | |
| 440 | /* |
| 441 | * 68060 manual says: |
| 442 | * cpush %dc : flush DC, remains valid (with our %cacr setup) |
| 443 | * cpush %ic : invalidate IC |
| 444 | * cpush %bc : flush DC + invalidate IC |
| 445 | */ |
| 446 | switch (scope) |
| 447 | { |
| 448 | case FLUSH_SCOPE_ALL: |
| 449 | switch (cache) |
| 450 | { |
| 451 | case FLUSH_CACHE_DATA: |
| 452 | __asm__ __volatile__ (".chip 68060\n\t" |
| 453 | "cpusha %dc\n\t" |
| 454 | ".chip 68k"); |
| 455 | break; |
| 456 | case FLUSH_CACHE_INSN: |
| 457 | __asm__ __volatile__ (".chip 68060\n\t" |
| 458 | "cpusha %ic\n\t" |
| 459 | ".chip 68k"); |
| 460 | break; |
| 461 | default: |
| 462 | case FLUSH_CACHE_BOTH: |
| 463 | __asm__ __volatile__ (".chip 68060\n\t" |
| 464 | "cpusha %bc\n\t" |
| 465 | ".chip 68k"); |
| 466 | break; |
| 467 | } |
| 468 | break; |
| 469 | |
| 470 | case FLUSH_SCOPE_LINE: |
| 471 | /* Find the physical address of the first mapped page in the |
| 472 | address range. */ |
| 473 | len += addr & 15; |
| 474 | addr &= -16; |
| 475 | if (!(paddr = virt_to_phys_060(addr))) { |
| 476 | unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK); |
| 477 | |
| 478 | if (len <= tmp) |
| 479 | return 0; |
| 480 | addr += tmp; |
| 481 | len -= tmp; |
| 482 | tmp = PAGE_SIZE; |
| 483 | for (;;) |
| 484 | { |
| 485 | if ((paddr = virt_to_phys_060(addr))) |
| 486 | break; |
| 487 | if (len <= tmp) |
| 488 | return 0; |
| 489 | addr += tmp; |
| 490 | len -= tmp; |
| 491 | } |
| 492 | } |
| 493 | len = (len + 15) >> 4; |
| 494 | i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4; |
| 495 | while (len--) |
| 496 | { |
| 497 | switch (cache) |
| 498 | { |
| 499 | case FLUSH_CACHE_DATA: |
| 500 | __asm__ __volatile__ (".chip 68060\n\t" |
| 501 | "cpushl %%dc,(%0)\n\t" |
| 502 | ".chip 68k" |
| 503 | : : "a" (paddr)); |
| 504 | break; |
| 505 | case FLUSH_CACHE_INSN: |
| 506 | __asm__ __volatile__ (".chip 68060\n\t" |
| 507 | "cpushl %%ic,(%0)\n\t" |
| 508 | ".chip 68k" |
| 509 | : : "a" (paddr)); |
| 510 | break; |
| 511 | default: |
| 512 | case FLUSH_CACHE_BOTH: |
| 513 | __asm__ __volatile__ (".chip 68060\n\t" |
| 514 | "cpushl %%bc,(%0)\n\t" |
| 515 | ".chip 68k" |
| 516 | : : "a" (paddr)); |
| 517 | break; |
| 518 | } |
| 519 | if (!--i && len) |
| 520 | { |
| 521 | |
| 522 | /* |
| 523 | * We just want to jump to the first cache line |
| 524 | * in the next page. |
| 525 | */ |
| 526 | addr += PAGE_SIZE; |
| 527 | addr &= PAGE_MASK; |
| 528 | |
| 529 | i = PAGE_SIZE / 16; |
| 530 | /* Recompute physical address when crossing a page |
| 531 | boundary. */ |
| 532 | for (;;) |
| 533 | { |
| 534 | if ((paddr = virt_to_phys_060(addr))) |
| 535 | break; |
| 536 | if (len <= i) |
| 537 | return 0; |
| 538 | len -= i; |
| 539 | addr += PAGE_SIZE; |
| 540 | } |
| 541 | } |
| 542 | else |
| 543 | paddr += 16; |
| 544 | } |
| 545 | break; |
| 546 | |
| 547 | default: |
| 548 | case FLUSH_SCOPE_PAGE: |
| 549 | len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1); |
| 550 | addr &= PAGE_MASK; /* Workaround for bug in some |
| 551 | revisions of the 68060 */ |
| 552 | for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE) |
| 553 | { |
| 554 | if (!(paddr = virt_to_phys_060(addr))) |
| 555 | continue; |
| 556 | switch (cache) |
| 557 | { |
| 558 | case FLUSH_CACHE_DATA: |
| 559 | __asm__ __volatile__ (".chip 68060\n\t" |
| 560 | "cpushp %%dc,(%0)\n\t" |
| 561 | ".chip 68k" |
| 562 | : : "a" (paddr)); |
| 563 | break; |
| 564 | case FLUSH_CACHE_INSN: |
| 565 | __asm__ __volatile__ (".chip 68060\n\t" |
| 566 | "cpushp %%ic,(%0)\n\t" |
| 567 | ".chip 68k" |
| 568 | : : "a" (paddr)); |
| 569 | break; |
| 570 | default: |
| 571 | case FLUSH_CACHE_BOTH: |
| 572 | __asm__ __volatile__ (".chip 68060\n\t" |
| 573 | "cpushp %%bc,(%0)\n\t" |
| 574 | ".chip 68k" |
| 575 | : : "a" (paddr)); |
| 576 | break; |
| 577 | } |
| 578 | } |
| 579 | break; |
| 580 | } |
| 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | /* sys_cacheflush -- flush (part of) the processor cache. */ |
| 585 | asmlinkage int |
| 586 | sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) |
| 587 | { |
| 588 | struct vm_area_struct *vma; |
| 589 | int ret = -EINVAL; |
| 590 | |
| 591 | lock_kernel(); |
| 592 | if (scope < FLUSH_SCOPE_LINE || scope > FLUSH_SCOPE_ALL || |
| 593 | cache & ~FLUSH_CACHE_BOTH) |
| 594 | goto out; |
| 595 | |
| 596 | if (scope == FLUSH_SCOPE_ALL) { |
| 597 | /* Only the superuser may explicitly flush the whole cache. */ |
| 598 | ret = -EPERM; |
| 599 | if (!capable(CAP_SYS_ADMIN)) |
| 600 | goto out; |
| 601 | } else { |
| 602 | /* |
| 603 | * Verify that the specified address region actually belongs |
| 604 | * to this process. |
| 605 | */ |
| 606 | vma = find_vma (current->mm, addr); |
| 607 | ret = -EINVAL; |
| 608 | /* Check for overflow. */ |
| 609 | if (addr + len < addr) |
| 610 | goto out; |
| 611 | if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) |
| 612 | goto out; |
| 613 | } |
| 614 | |
| 615 | if (CPU_IS_020_OR_030) { |
| 616 | if (scope == FLUSH_SCOPE_LINE && len < 256) { |
| 617 | unsigned long cacr; |
| 618 | __asm__ ("movec %%cacr, %0" : "=r" (cacr)); |
| 619 | if (cache & FLUSH_CACHE_INSN) |
| 620 | cacr |= 4; |
| 621 | if (cache & FLUSH_CACHE_DATA) |
| 622 | cacr |= 0x400; |
| 623 | len >>= 2; |
| 624 | while (len--) { |
| 625 | __asm__ __volatile__ ("movec %1, %%caar\n\t" |
| 626 | "movec %0, %%cacr" |
| 627 | : /* no outputs */ |
| 628 | : "r" (cacr), "r" (addr)); |
| 629 | addr += 4; |
| 630 | } |
| 631 | } else { |
| 632 | /* Flush the whole cache, even if page granularity requested. */ |
| 633 | unsigned long cacr; |
| 634 | __asm__ ("movec %%cacr, %0" : "=r" (cacr)); |
| 635 | if (cache & FLUSH_CACHE_INSN) |
| 636 | cacr |= 8; |
| 637 | if (cache & FLUSH_CACHE_DATA) |
| 638 | cacr |= 0x800; |
| 639 | __asm__ __volatile__ ("movec %0, %%cacr" : : "r" (cacr)); |
| 640 | } |
| 641 | ret = 0; |
| 642 | goto out; |
| 643 | } else { |
| 644 | /* |
| 645 | * 040 or 060: don't blindly trust 'scope', someone could |
| 646 | * try to flush a few megs of memory. |
| 647 | */ |
| 648 | |
| 649 | if (len>=3*PAGE_SIZE && scope<FLUSH_SCOPE_PAGE) |
| 650 | scope=FLUSH_SCOPE_PAGE; |
| 651 | if (len>=10*PAGE_SIZE && scope<FLUSH_SCOPE_ALL) |
| 652 | scope=FLUSH_SCOPE_ALL; |
| 653 | if (CPU_IS_040) { |
| 654 | ret = cache_flush_040 (addr, scope, cache, len); |
| 655 | } else if (CPU_IS_060) { |
| 656 | ret = cache_flush_060 (addr, scope, cache, len); |
| 657 | } |
| 658 | } |
| 659 | out: |
| 660 | unlock_kernel(); |
| 661 | return ret; |
| 662 | } |
| 663 | |
| 664 | asmlinkage int sys_getpagesize(void) |
| 665 | { |
| 666 | return PAGE_SIZE; |
| 667 | } |
Arnd Bergmann | fe74290 | 2006-10-02 02:18:34 -0700 | [diff] [blame] | 668 | |
| 669 | /* |
| 670 | * Do a system call from kernel instead of calling sys_execve so we |
| 671 | * end up with proper pt_regs. |
| 672 | */ |
| 673 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) |
| 674 | { |
| 675 | register long __res asm ("%d0") = __NR_execve; |
| 676 | register long __a asm ("%d1") = (long)(filename); |
| 677 | register long __b asm ("%d2") = (long)(argv); |
| 678 | register long __c asm ("%d3") = (long)(envp); |
| 679 | asm volatile ("trap #0" : "+d" (__res) |
| 680 | : "d" (__a), "d" (__b), "d" (__c)); |
| 681 | return __res; |
| 682 | } |