Commit | Line | Data |
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1da177e4 LT |
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 | ||
a9415644 | 9 | #include <linux/capability.h> |
1da177e4 LT |
10 | #include <linux/errno.h> |
11 | #include <linux/sched.h> | |
12 | #include <linux/mm.h> | |
4e950f6f | 13 | #include <linux/fs.h> |
1da177e4 LT |
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> | |
cba4fbbf | 24 | #include <linux/ipc.h> |
1da177e4 LT |
25 | |
26 | #include <asm/setup.h> | |
27 | #include <asm/uaccess.h> | |
28 | #include <asm/cachectl.h> | |
29 | #include <asm/traps.h> | |
1da177e4 | 30 | #include <asm/page.h> |
fe74290d | 31 | #include <asm/unistd.h> |
1da177e4 LT |
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 | */ | |
350c20a6 | 37 | asmlinkage int sys_pipe(unsigned long __user * fildes) |
1da177e4 LT |
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 | ||
350c20a6 | 99 | asmlinkage int old_mmap(struct mmap_arg_struct __user *arg) |
1da177e4 LT |
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; | |
350c20a6 AV |
165 | fd_set __user *inp, *outp, *exp; |
166 | struct timeval __user *tvp; | |
1da177e4 LT |
167 | }; |
168 | ||
350c20a6 | 169 | asmlinkage int old_select(struct sel_arg_struct __user *arg) |
1da177e4 LT |
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, | |
350c20a6 | 185 | int third, void __user *ptr, long fifth) |
1da177e4 LT |
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: | |
350c20a6 | 195 | return sys_semop (first, ptr, second); |
1da177e4 LT |
196 | case SEMGET: |
197 | return sys_semget (first, second, third); | |
198 | case SEMCTL: { | |
199 | union semun fourth; | |
200 | if (!ptr) | |
201 | return -EINVAL; | |
350c20a6 | 202 | if (get_user(fourth.__pad, (void __user *__user *) ptr)) |
1da177e4 LT |
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: | |
350c20a6 | 212 | return sys_msgsnd (first, ptr, second, third); |
1da177e4 LT |
213 | case MSGRCV: |
214 | switch (version) { | |
215 | case 0: { | |
216 | struct ipc_kludge tmp; | |
217 | if (!ptr) | |
218 | return -EINVAL; | |
350c20a6 | 219 | if (copy_from_user (&tmp, ptr, sizeof (tmp))) |
1da177e4 LT |
220 | return -EFAULT; |
221 | return sys_msgrcv (first, tmp.msgp, second, | |
222 | tmp.msgtyp, third); | |
223 | } | |
224 | default: | |
350c20a6 | 225 | return sys_msgrcv (first, ptr, |
1da177e4 LT |
226 | second, fifth, third); |
227 | } | |
228 | case MSGGET: | |
229 | return sys_msgget ((key_t) first, second); | |
230 | case MSGCTL: | |
350c20a6 | 231 | return sys_msgctl (first, second, ptr); |
1da177e4 LT |
232 | default: |
233 | return -ENOSYS; | |
234 | } | |
235 | if (call <= SHMCTL) | |
236 | switch (call) { | |
237 | case SHMAT: | |
238 | switch (version) { | |
239 | default: { | |
240 | ulong raddr; | |
350c20a6 | 241 | ret = do_shmat (first, ptr, second, &raddr); |
1da177e4 LT |
242 | if (ret) |
243 | return ret; | |
350c20a6 | 244 | return put_user (raddr, (ulong __user *) third); |
1da177e4 LT |
245 | } |
246 | } | |
247 | case SHMDT: | |
350c20a6 | 248 | return sys_shmdt (ptr); |
1da177e4 LT |
249 | case SHMGET: |
250 | return sys_shmget (first, second, third); | |
251 | case SHMCTL: | |
350c20a6 | 252 | return sys_shmctl (first, second, ptr); |
1da177e4 LT |
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 | } | |
fe74290d AB |
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 | } |