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e01402b1 RB |
1 | /* |
2 | * Copyright (C) 2004, 2005 MIPS Technologies, Inc. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can distribute it and/or modify it | |
5 | * under the terms of the GNU General Public License (Version 2) as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
11 | * for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along | |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
e01402b1 RB |
16 | */ |
17 | ||
18 | /* | |
19 | * VPE support module | |
20 | * | |
21 | * Provides support for loading a MIPS SP program on VPE1. | |
25985edc | 22 | * The SP environment is rather simple, no tlb's. It needs to be relocatable |
e01402b1 RB |
23 | * (or partially linked). You should initialise your stack in the startup |
24 | * code. This loader looks for the symbol __start and sets up | |
25 | * execution to resume from there. The MIPS SDE kit contains suitable examples. | |
26 | * | |
27 | * To load and run, simply cat a SP 'program file' to /dev/vpe1. | |
28 | * i.e cat spapp >/dev/vpe1. | |
e01402b1 | 29 | */ |
e01402b1 | 30 | #include <linux/kernel.h> |
27a3bbaf | 31 | #include <linux/device.h> |
e01402b1 RB |
32 | #include <linux/fs.h> |
33 | #include <linux/init.h> | |
34 | #include <asm/uaccess.h> | |
35 | #include <linux/slab.h> | |
36 | #include <linux/list.h> | |
37 | #include <linux/vmalloc.h> | |
38 | #include <linux/elf.h> | |
39 | #include <linux/seq_file.h> | |
40 | #include <linux/syscalls.h> | |
41 | #include <linux/moduleloader.h> | |
42 | #include <linux/interrupt.h> | |
43 | #include <linux/poll.h> | |
44 | #include <linux/bootmem.h> | |
45 | #include <asm/mipsregs.h> | |
340ee4b9 | 46 | #include <asm/mipsmtregs.h> |
e01402b1 | 47 | #include <asm/cacheflush.h> |
60063497 | 48 | #include <linux/atomic.h> |
e01402b1 | 49 | #include <asm/cpu.h> |
27a3bbaf | 50 | #include <asm/mips_mt.h> |
e01402b1 | 51 | #include <asm/processor.h> |
2600990e | 52 | #include <asm/vpe.h> |
e01402b1 RB |
53 | |
54 | typedef void *vpe_handle; | |
55 | ||
e01402b1 RB |
56 | #ifndef ARCH_SHF_SMALL |
57 | #define ARCH_SHF_SMALL 0 | |
58 | #endif | |
59 | ||
60 | /* If this is set, the section belongs in the init part of the module */ | |
61 | #define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1)) | |
62 | ||
41790e04 RB |
63 | /* |
64 | * The number of TCs and VPEs physically available on the core | |
65 | */ | |
66 | static int hw_tcs, hw_vpes; | |
e01402b1 | 67 | static char module_name[] = "vpe"; |
307bd284 | 68 | static int major; |
27a3bbaf | 69 | static const int minor = 1; /* fixed for now */ |
e01402b1 RB |
70 | |
71 | /* grab the likely amount of memory we will need. */ | |
72 | #ifdef CONFIG_MIPS_VPE_LOADER_TOM | |
73 | #define P_SIZE (2 * 1024 * 1024) | |
74 | #else | |
75 | /* add an overhead to the max kmalloc size for non-striped symbols/etc */ | |
76 | #define P_SIZE (256 * 1024) | |
77 | #endif | |
78 | ||
2600990e RB |
79 | extern unsigned long physical_memsize; |
80 | ||
e01402b1 | 81 | #define MAX_VPES 16 |
2600990e | 82 | #define VPE_PATH_MAX 256 |
e01402b1 RB |
83 | |
84 | enum vpe_state { | |
85 | VPE_STATE_UNUSED = 0, | |
86 | VPE_STATE_INUSE, | |
87 | VPE_STATE_RUNNING | |
88 | }; | |
89 | ||
90 | enum tc_state { | |
91 | TC_STATE_UNUSED = 0, | |
92 | TC_STATE_INUSE, | |
93 | TC_STATE_RUNNING, | |
94 | TC_STATE_DYNAMIC | |
95 | }; | |
96 | ||
307bd284 | 97 | struct vpe { |
e01402b1 RB |
98 | enum vpe_state state; |
99 | ||
100 | /* (device) minor associated with this vpe */ | |
101 | int minor; | |
102 | ||
103 | /* elfloader stuff */ | |
104 | void *load_addr; | |
571e0bed | 105 | unsigned long len; |
e01402b1 | 106 | char *pbuffer; |
571e0bed | 107 | unsigned long plen; |
2600990e RB |
108 | unsigned int uid, gid; |
109 | char cwd[VPE_PATH_MAX]; | |
e01402b1 RB |
110 | |
111 | unsigned long __start; | |
112 | ||
113 | /* tc's associated with this vpe */ | |
114 | struct list_head tc; | |
115 | ||
116 | /* The list of vpe's */ | |
117 | struct list_head list; | |
118 | ||
119 | /* shared symbol address */ | |
120 | void *shared_ptr; | |
2600990e RB |
121 | |
122 | /* the list of who wants to know when something major happens */ | |
123 | struct list_head notify; | |
41790e04 RB |
124 | |
125 | unsigned int ntcs; | |
307bd284 RB |
126 | }; |
127 | ||
128 | struct tc { | |
129 | enum tc_state state; | |
130 | int index; | |
131 | ||
07cc0c9e RB |
132 | struct vpe *pvpe; /* parent VPE */ |
133 | struct list_head tc; /* The list of TC's with this VPE */ | |
134 | struct list_head list; /* The global list of tc's */ | |
307bd284 | 135 | }; |
e01402b1 | 136 | |
9cfdf6f1 | 137 | struct { |
1bbfc20d RB |
138 | spinlock_t vpe_list_lock; |
139 | struct list_head vpe_list; /* Virtual processing elements */ | |
140 | spinlock_t tc_list_lock; | |
141 | struct list_head tc_list; /* Thread contexts */ | |
9cfdf6f1 | 142 | } vpecontrol = { |
52bd080d | 143 | .vpe_list_lock = __SPIN_LOCK_UNLOCKED(vpe_list_lock), |
1bbfc20d | 144 | .vpe_list = LIST_HEAD_INIT(vpecontrol.vpe_list), |
52bd080d | 145 | .tc_list_lock = __SPIN_LOCK_UNLOCKED(tc_list_lock), |
1bbfc20d | 146 | .tc_list = LIST_HEAD_INIT(vpecontrol.tc_list) |
9cfdf6f1 | 147 | }; |
e01402b1 RB |
148 | |
149 | static void release_progmem(void *ptr); | |
e01402b1 RB |
150 | |
151 | /* get the vpe associated with this minor */ | |
f18b51cc | 152 | static struct vpe *get_vpe(int minor) |
e01402b1 | 153 | { |
1bbfc20d | 154 | struct vpe *res, *v; |
e01402b1 | 155 | |
2600990e RB |
156 | if (!cpu_has_mipsmt) |
157 | return NULL; | |
158 | ||
1bbfc20d RB |
159 | res = NULL; |
160 | spin_lock(&vpecontrol.vpe_list_lock); | |
e01402b1 | 161 | list_for_each_entry(v, &vpecontrol.vpe_list, list) { |
1bbfc20d RB |
162 | if (v->minor == minor) { |
163 | res = v; | |
164 | break; | |
165 | } | |
e01402b1 | 166 | } |
1bbfc20d | 167 | spin_unlock(&vpecontrol.vpe_list_lock); |
e01402b1 | 168 | |
1bbfc20d | 169 | return res; |
e01402b1 RB |
170 | } |
171 | ||
172 | /* get the vpe associated with this minor */ | |
f18b51cc | 173 | static struct tc *get_tc(int index) |
e01402b1 | 174 | { |
1bbfc20d | 175 | struct tc *res, *t; |
e01402b1 | 176 | |
1bbfc20d RB |
177 | res = NULL; |
178 | spin_lock(&vpecontrol.tc_list_lock); | |
e01402b1 | 179 | list_for_each_entry(t, &vpecontrol.tc_list, list) { |
1bbfc20d RB |
180 | if (t->index == index) { |
181 | res = t; | |
182 | break; | |
183 | } | |
e01402b1 | 184 | } |
1bbfc20d | 185 | spin_unlock(&vpecontrol.tc_list_lock); |
e01402b1 | 186 | |
9fbcbd7e | 187 | return res; |
e01402b1 RB |
188 | } |
189 | ||
e01402b1 | 190 | /* allocate a vpe and associate it with this minor (or index) */ |
f18b51cc | 191 | static struct vpe *alloc_vpe(int minor) |
e01402b1 RB |
192 | { |
193 | struct vpe *v; | |
194 | ||
1bbfc20d | 195 | if ((v = kzalloc(sizeof(struct vpe), GFP_KERNEL)) == NULL) |
e01402b1 | 196 | return NULL; |
e01402b1 | 197 | |
e01402b1 | 198 | INIT_LIST_HEAD(&v->tc); |
1bbfc20d | 199 | spin_lock(&vpecontrol.vpe_list_lock); |
e01402b1 | 200 | list_add_tail(&v->list, &vpecontrol.vpe_list); |
1bbfc20d | 201 | spin_unlock(&vpecontrol.vpe_list_lock); |
e01402b1 | 202 | |
2600990e | 203 | INIT_LIST_HEAD(&v->notify); |
e01402b1 | 204 | v->minor = minor; |
1bbfc20d | 205 | |
e01402b1 RB |
206 | return v; |
207 | } | |
208 | ||
209 | /* allocate a tc. At startup only tc0 is running, all other can be halted. */ | |
f18b51cc | 210 | static struct tc *alloc_tc(int index) |
e01402b1 | 211 | { |
07cc0c9e | 212 | struct tc *tc; |
e01402b1 | 213 | |
07cc0c9e RB |
214 | if ((tc = kzalloc(sizeof(struct tc), GFP_KERNEL)) == NULL) |
215 | goto out; | |
e01402b1 | 216 | |
07cc0c9e RB |
217 | INIT_LIST_HEAD(&tc->tc); |
218 | tc->index = index; | |
1bbfc20d RB |
219 | |
220 | spin_lock(&vpecontrol.tc_list_lock); | |
07cc0c9e | 221 | list_add_tail(&tc->list, &vpecontrol.tc_list); |
1bbfc20d | 222 | spin_unlock(&vpecontrol.tc_list_lock); |
e01402b1 | 223 | |
07cc0c9e RB |
224 | out: |
225 | return tc; | |
e01402b1 RB |
226 | } |
227 | ||
228 | /* clean up and free everything */ | |
f18b51cc | 229 | static void release_vpe(struct vpe *v) |
e01402b1 RB |
230 | { |
231 | list_del(&v->list); | |
232 | if (v->load_addr) | |
233 | release_progmem(v); | |
234 | kfree(v); | |
235 | } | |
236 | ||
1bbfc20d | 237 | static void __maybe_unused dump_mtregs(void) |
e01402b1 RB |
238 | { |
239 | unsigned long val; | |
240 | ||
241 | val = read_c0_config3(); | |
242 | printk("config3 0x%lx MT %ld\n", val, | |
243 | (val & CONFIG3_MT) >> CONFIG3_MT_SHIFT); | |
244 | ||
e01402b1 RB |
245 | val = read_c0_mvpcontrol(); |
246 | printk("MVPControl 0x%lx, STLB %ld VPC %ld EVP %ld\n", val, | |
247 | (val & MVPCONTROL_STLB) >> MVPCONTROL_STLB_SHIFT, | |
248 | (val & MVPCONTROL_VPC) >> MVPCONTROL_VPC_SHIFT, | |
249 | (val & MVPCONTROL_EVP)); | |
250 | ||
2600990e RB |
251 | val = read_c0_mvpconf0(); |
252 | printk("mvpconf0 0x%lx, PVPE %ld PTC %ld M %ld\n", val, | |
253 | (val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT, | |
254 | val & MVPCONF0_PTC, (val & MVPCONF0_M) >> MVPCONF0_M_SHIFT); | |
e01402b1 RB |
255 | } |
256 | ||
70342287 | 257 | /* Find some VPE program space */ |
571e0bed | 258 | static void *alloc_progmem(unsigned long len) |
e01402b1 | 259 | { |
5408c490 RB |
260 | void *addr; |
261 | ||
e01402b1 | 262 | #ifdef CONFIG_MIPS_VPE_LOADER_TOM |
5408c490 RB |
263 | /* |
264 | * This means you must tell Linux to use less memory than you | |
265 | * physically have, for example by passing a mem= boot argument. | |
266 | */ | |
9f2546ad | 267 | addr = pfn_to_kaddr(max_low_pfn); |
5408c490 | 268 | memset(addr, 0, len); |
e01402b1 | 269 | #else |
5408c490 RB |
270 | /* simple grab some mem for now */ |
271 | addr = kzalloc(len, GFP_KERNEL); | |
e01402b1 | 272 | #endif |
5408c490 RB |
273 | |
274 | return addr; | |
e01402b1 RB |
275 | } |
276 | ||
277 | static void release_progmem(void *ptr) | |
278 | { | |
279 | #ifndef CONFIG_MIPS_VPE_LOADER_TOM | |
280 | kfree(ptr); | |
281 | #endif | |
282 | } | |
283 | ||
284 | /* Update size with this section: return offset. */ | |
285 | static long get_offset(unsigned long *size, Elf_Shdr * sechdr) | |
286 | { | |
287 | long ret; | |
288 | ||
289 | ret = ALIGN(*size, sechdr->sh_addralign ? : 1); | |
290 | *size = ret + sechdr->sh_size; | |
291 | return ret; | |
292 | } | |
293 | ||
294 | /* Lay out the SHF_ALLOC sections in a way not dissimilar to how ld | |
70342287 | 295 | might -- code, read-only data, read-write data, small data. Tally |
e01402b1 RB |
296 | sizes, and place the offsets into sh_entsize fields: high bit means it |
297 | belongs in init. */ | |
298 | static void layout_sections(struct module *mod, const Elf_Ehdr * hdr, | |
299 | Elf_Shdr * sechdrs, const char *secstrings) | |
300 | { | |
301 | static unsigned long const masks[][2] = { | |
302 | /* NOTE: all executable code must be the first section | |
303 | * in this array; otherwise modify the text_size | |
304 | * finder in the two loops below */ | |
305 | {SHF_EXECINSTR | SHF_ALLOC, ARCH_SHF_SMALL}, | |
306 | {SHF_ALLOC, SHF_WRITE | ARCH_SHF_SMALL}, | |
307 | {SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL}, | |
308 | {ARCH_SHF_SMALL | SHF_ALLOC, 0} | |
309 | }; | |
310 | unsigned int m, i; | |
311 | ||
312 | for (i = 0; i < hdr->e_shnum; i++) | |
313 | sechdrs[i].sh_entsize = ~0UL; | |
314 | ||
315 | for (m = 0; m < ARRAY_SIZE(masks); ++m) { | |
316 | for (i = 0; i < hdr->e_shnum; ++i) { | |
317 | Elf_Shdr *s = &sechdrs[i]; | |
318 | ||
319 | // || strncmp(secstrings + s->sh_name, ".init", 5) == 0) | |
320 | if ((s->sh_flags & masks[m][0]) != masks[m][0] | |
321 | || (s->sh_flags & masks[m][1]) | |
322 | || s->sh_entsize != ~0UL) | |
323 | continue; | |
e2a9cf96 RG |
324 | s->sh_entsize = |
325 | get_offset((unsigned long *)&mod->core_size, s); | |
e01402b1 RB |
326 | } |
327 | ||
328 | if (m == 0) | |
329 | mod->core_text_size = mod->core_size; | |
330 | ||
331 | } | |
332 | } | |
333 | ||
334 | ||
335 | /* from module-elf32.c, but subverted a little */ | |
336 | ||
337 | struct mips_hi16 { | |
338 | struct mips_hi16 *next; | |
339 | Elf32_Addr *addr; | |
340 | Elf32_Addr value; | |
341 | }; | |
342 | ||
343 | static struct mips_hi16 *mips_hi16_list; | |
344 | static unsigned int gp_offs, gp_addr; | |
345 | ||
346 | static int apply_r_mips_none(struct module *me, uint32_t *location, | |
347 | Elf32_Addr v) | |
348 | { | |
349 | return 0; | |
350 | } | |
351 | ||
352 | static int apply_r_mips_gprel16(struct module *me, uint32_t *location, | |
353 | Elf32_Addr v) | |
354 | { | |
355 | int rel; | |
356 | ||
357 | if( !(*location & 0xffff) ) { | |
358 | rel = (int)v - gp_addr; | |
359 | } | |
360 | else { | |
361 | /* .sbss + gp(relative) + offset */ | |
362 | /* kludge! */ | |
363 | rel = (int)(short)((int)v + gp_offs + | |
364 | (int)(short)(*location & 0xffff) - gp_addr); | |
365 | } | |
366 | ||
367 | if( (rel > 32768) || (rel < -32768) ) { | |
2600990e RB |
368 | printk(KERN_DEBUG "VPE loader: apply_r_mips_gprel16: " |
369 | "relative address 0x%x out of range of gp register\n", | |
370 | rel); | |
e01402b1 RB |
371 | return -ENOEXEC; |
372 | } | |
373 | ||
374 | *location = (*location & 0xffff0000) | (rel & 0xffff); | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | static int apply_r_mips_pc16(struct module *me, uint32_t *location, | |
380 | Elf32_Addr v) | |
381 | { | |
382 | int rel; | |
383 | rel = (((unsigned int)v - (unsigned int)location)); | |
384 | rel >>= 2; // because the offset is in _instructions_ not bytes. | |
385 | rel -= 1; // and one instruction less due to the branch delay slot. | |
386 | ||
387 | if( (rel > 32768) || (rel < -32768) ) { | |
2600990e | 388 | printk(KERN_DEBUG "VPE loader: " |
70342287 | 389 | "apply_r_mips_pc16: relative address out of range 0x%x\n", rel); |
e01402b1 RB |
390 | return -ENOEXEC; |
391 | } | |
392 | ||
393 | *location = (*location & 0xffff0000) | (rel & 0xffff); | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
398 | static int apply_r_mips_32(struct module *me, uint32_t *location, | |
399 | Elf32_Addr v) | |
400 | { | |
401 | *location += v; | |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
406 | static int apply_r_mips_26(struct module *me, uint32_t *location, | |
407 | Elf32_Addr v) | |
408 | { | |
409 | if (v % 4) { | |
2600990e RB |
410 | printk(KERN_DEBUG "VPE loader: apply_r_mips_26 " |
411 | " unaligned relocation\n"); | |
e01402b1 RB |
412 | return -ENOEXEC; |
413 | } | |
414 | ||
307bd284 RB |
415 | /* |
416 | * Not desperately convinced this is a good check of an overflow condition | |
417 | * anyway. But it gets in the way of handling undefined weak symbols which | |
418 | * we want to set to zero. | |
419 | * if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { | |
420 | * printk(KERN_ERR | |
421 | * "module %s: relocation overflow\n", | |
422 | * me->name); | |
423 | * return -ENOEXEC; | |
424 | * } | |
425 | */ | |
e01402b1 RB |
426 | |
427 | *location = (*location & ~0x03ffffff) | | |
428 | ((*location + (v >> 2)) & 0x03ffffff); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | static int apply_r_mips_hi16(struct module *me, uint32_t *location, | |
433 | Elf32_Addr v) | |
434 | { | |
435 | struct mips_hi16 *n; | |
436 | ||
437 | /* | |
438 | * We cannot relocate this one now because we don't know the value of | |
439 | * the carry we need to add. Save the information, and let LO16 do the | |
440 | * actual relocation. | |
441 | */ | |
442 | n = kmalloc(sizeof *n, GFP_KERNEL); | |
443 | if (!n) | |
444 | return -ENOMEM; | |
445 | ||
446 | n->addr = location; | |
447 | n->value = v; | |
448 | n->next = mips_hi16_list; | |
449 | mips_hi16_list = n; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
454 | static int apply_r_mips_lo16(struct module *me, uint32_t *location, | |
455 | Elf32_Addr v) | |
456 | { | |
457 | unsigned long insnlo = *location; | |
458 | Elf32_Addr val, vallo; | |
477c4b07 | 459 | struct mips_hi16 *l, *next; |
e01402b1 | 460 | |
70342287 | 461 | /* Sign extend the addend we extract from the lo insn. */ |
e01402b1 RB |
462 | vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000; |
463 | ||
464 | if (mips_hi16_list != NULL) { | |
e01402b1 RB |
465 | |
466 | l = mips_hi16_list; | |
467 | while (l != NULL) { | |
e01402b1 RB |
468 | unsigned long insn; |
469 | ||
470 | /* | |
471 | * The value for the HI16 had best be the same. | |
472 | */ | |
70342287 | 473 | if (v != l->value) { |
2600990e | 474 | printk(KERN_DEBUG "VPE loader: " |
b1e3afa0 | 475 | "apply_r_mips_lo16/hi16: \t" |
2600990e | 476 | "inconsistent value information\n"); |
477c4b07 | 477 | goto out_free; |
e01402b1 RB |
478 | } |
479 | ||
e01402b1 RB |
480 | /* |
481 | * Do the HI16 relocation. Note that we actually don't | |
482 | * need to know anything about the LO16 itself, except | |
483 | * where to find the low 16 bits of the addend needed | |
484 | * by the LO16. | |
485 | */ | |
486 | insn = *l->addr; | |
487 | val = ((insn & 0xffff) << 16) + vallo; | |
488 | val += v; | |
489 | ||
490 | /* | |
491 | * Account for the sign extension that will happen in | |
492 | * the low bits. | |
493 | */ | |
494 | val = ((val >> 16) + ((val & 0x8000) != 0)) & 0xffff; | |
495 | ||
496 | insn = (insn & ~0xffff) | val; | |
497 | *l->addr = insn; | |
498 | ||
499 | next = l->next; | |
500 | kfree(l); | |
501 | l = next; | |
502 | } | |
503 | ||
504 | mips_hi16_list = NULL; | |
505 | } | |
506 | ||
507 | /* | |
70342287 | 508 | * Ok, we're done with the HI16 relocs. Now deal with the LO16. |
e01402b1 RB |
509 | */ |
510 | val = v + vallo; | |
511 | insnlo = (insnlo & ~0xffff) | (val & 0xffff); | |
512 | *location = insnlo; | |
513 | ||
514 | return 0; | |
477c4b07 RB |
515 | |
516 | out_free: | |
517 | while (l != NULL) { | |
518 | next = l->next; | |
519 | kfree(l); | |
520 | l = next; | |
521 | } | |
522 | mips_hi16_list = NULL; | |
523 | ||
524 | return -ENOEXEC; | |
e01402b1 RB |
525 | } |
526 | ||
527 | static int (*reloc_handlers[]) (struct module *me, uint32_t *location, | |
528 | Elf32_Addr v) = { | |
529 | [R_MIPS_NONE] = apply_r_mips_none, | |
530 | [R_MIPS_32] = apply_r_mips_32, | |
531 | [R_MIPS_26] = apply_r_mips_26, | |
532 | [R_MIPS_HI16] = apply_r_mips_hi16, | |
533 | [R_MIPS_LO16] = apply_r_mips_lo16, | |
534 | [R_MIPS_GPREL16] = apply_r_mips_gprel16, | |
535 | [R_MIPS_PC16] = apply_r_mips_pc16 | |
536 | }; | |
537 | ||
2600990e | 538 | static char *rstrs[] = { |
e0daad44 | 539 | [R_MIPS_NONE] = "MIPS_NONE", |
2600990e RB |
540 | [R_MIPS_32] = "MIPS_32", |
541 | [R_MIPS_26] = "MIPS_26", | |
542 | [R_MIPS_HI16] = "MIPS_HI16", | |
543 | [R_MIPS_LO16] = "MIPS_LO16", | |
544 | [R_MIPS_GPREL16] = "MIPS_GPREL16", | |
545 | [R_MIPS_PC16] = "MIPS_PC16" | |
546 | }; | |
e01402b1 | 547 | |
f18b51cc | 548 | static int apply_relocations(Elf32_Shdr *sechdrs, |
e01402b1 RB |
549 | const char *strtab, |
550 | unsigned int symindex, | |
551 | unsigned int relsec, | |
552 | struct module *me) | |
553 | { | |
554 | Elf32_Rel *rel = (void *) sechdrs[relsec].sh_addr; | |
555 | Elf32_Sym *sym; | |
556 | uint32_t *location; | |
557 | unsigned int i; | |
558 | Elf32_Addr v; | |
559 | int res; | |
560 | ||
561 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { | |
562 | Elf32_Word r_info = rel[i].r_info; | |
563 | ||
564 | /* This is where to make the change */ | |
565 | location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr | |
566 | + rel[i].r_offset; | |
567 | /* This is the symbol it is referring to */ | |
568 | sym = (Elf32_Sym *)sechdrs[symindex].sh_addr | |
569 | + ELF32_R_SYM(r_info); | |
570 | ||
571 | if (!sym->st_value) { | |
572 | printk(KERN_DEBUG "%s: undefined weak symbol %s\n", | |
573 | me->name, strtab + sym->st_name); | |
574 | /* just print the warning, dont barf */ | |
575 | } | |
576 | ||
577 | v = sym->st_value; | |
578 | ||
579 | res = reloc_handlers[ELF32_R_TYPE(r_info)](me, location, v); | |
580 | if( res ) { | |
2600990e | 581 | char *r = rstrs[ELF32_R_TYPE(r_info)]; |
70342287 | 582 | printk(KERN_WARNING "VPE loader: .text+0x%x " |
2600990e RB |
583 | "relocation type %s for symbol \"%s\" failed\n", |
584 | rel[i].r_offset, r ? r : "UNKNOWN", | |
585 | strtab + sym->st_name); | |
e01402b1 | 586 | return res; |
2600990e | 587 | } |
e01402b1 RB |
588 | } |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
f18b51cc | 593 | static inline void save_gp_address(unsigned int secbase, unsigned int rel) |
e01402b1 RB |
594 | { |
595 | gp_addr = secbase + rel; | |
596 | gp_offs = gp_addr - (secbase & 0xffff0000); | |
597 | } | |
598 | /* end module-elf32.c */ | |
599 | ||
600 | ||
601 | ||
602 | /* Change all symbols so that sh_value encodes the pointer directly. */ | |
2600990e | 603 | static void simplify_symbols(Elf_Shdr * sechdrs, |
e01402b1 RB |
604 | unsigned int symindex, |
605 | const char *strtab, | |
606 | const char *secstrings, | |
607 | unsigned int nsecs, struct module *mod) | |
608 | { | |
609 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
610 | unsigned long secbase, bssbase = 0; | |
611 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
2600990e | 612 | int size; |
e01402b1 RB |
613 | |
614 | /* find the .bss section for COMMON symbols */ | |
615 | for (i = 0; i < nsecs; i++) { | |
2600990e | 616 | if (strncmp(secstrings + sechdrs[i].sh_name, ".bss", 4) == 0) { |
e01402b1 | 617 | bssbase = sechdrs[i].sh_addr; |
2600990e RB |
618 | break; |
619 | } | |
e01402b1 RB |
620 | } |
621 | ||
622 | for (i = 1; i < n; i++) { | |
623 | switch (sym[i].st_shndx) { | |
624 | case SHN_COMMON: | |
2600990e RB |
625 | /* Allocate space for the symbol in the .bss section. |
626 | st_value is currently size. | |
e01402b1 RB |
627 | We want it to have the address of the symbol. */ |
628 | ||
629 | size = sym[i].st_value; | |
630 | sym[i].st_value = bssbase; | |
631 | ||
632 | bssbase += size; | |
633 | break; | |
634 | ||
635 | case SHN_ABS: | |
636 | /* Don't need to do anything */ | |
637 | break; | |
638 | ||
639 | case SHN_UNDEF: | |
640 | /* ret = -ENOENT; */ | |
641 | break; | |
642 | ||
643 | case SHN_MIPS_SCOMMON: | |
b1e3afa0 | 644 | printk(KERN_DEBUG "simplify_symbols: ignoring SHN_MIPS_SCOMMON " |
2600990e RB |
645 | "symbol <%s> st_shndx %d\n", strtab + sym[i].st_name, |
646 | sym[i].st_shndx); | |
e01402b1 RB |
647 | // .sbss section |
648 | break; | |
649 | ||
650 | default: | |
651 | secbase = sechdrs[sym[i].st_shndx].sh_addr; | |
652 | ||
653 | if (strncmp(strtab + sym[i].st_name, "_gp", 3) == 0) { | |
654 | save_gp_address(secbase, sym[i].st_value); | |
655 | } | |
656 | ||
657 | sym[i].st_value += secbase; | |
658 | break; | |
659 | } | |
e01402b1 | 660 | } |
e01402b1 RB |
661 | } |
662 | ||
663 | #ifdef DEBUG_ELFLOADER | |
664 | static void dump_elfsymbols(Elf_Shdr * sechdrs, unsigned int symindex, | |
665 | const char *strtab, struct module *mod) | |
666 | { | |
667 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
668 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
669 | ||
670 | printk(KERN_DEBUG "dump_elfsymbols: n %d\n", n); | |
671 | for (i = 1; i < n; i++) { | |
672 | printk(KERN_DEBUG " i %d name <%s> 0x%x\n", i, | |
673 | strtab + sym[i].st_name, sym[i].st_value); | |
674 | } | |
675 | } | |
676 | #endif | |
677 | ||
e01402b1 | 678 | /* We are prepared so configure and start the VPE... */ |
be6e1437 | 679 | static int vpe_run(struct vpe * v) |
e01402b1 | 680 | { |
07cc0c9e | 681 | unsigned long flags, val, dmt_flag; |
2600990e | 682 | struct vpe_notifications *n; |
07cc0c9e | 683 | unsigned int vpeflags; |
e01402b1 RB |
684 | struct tc *t; |
685 | ||
686 | /* check we are the Master VPE */ | |
07cc0c9e | 687 | local_irq_save(flags); |
e01402b1 RB |
688 | val = read_c0_vpeconf0(); |
689 | if (!(val & VPECONF0_MVP)) { | |
690 | printk(KERN_WARNING | |
2600990e | 691 | "VPE loader: only Master VPE's are allowed to configure MT\n"); |
07cc0c9e RB |
692 | local_irq_restore(flags); |
693 | ||
e01402b1 RB |
694 | return -1; |
695 | } | |
696 | ||
07cc0c9e RB |
697 | dmt_flag = dmt(); |
698 | vpeflags = dvpe(); | |
e01402b1 | 699 | |
535237ce | 700 | if (list_empty(&v->tc)) { |
07cc0c9e RB |
701 | evpe(vpeflags); |
702 | emt(dmt_flag); | |
703 | local_irq_restore(flags); | |
704 | ||
705 | printk(KERN_WARNING | |
706 | "VPE loader: No TC's associated with VPE %d\n", | |
e0daad44 | 707 | v->minor); |
07cc0c9e | 708 | |
e0daad44 RB |
709 | return -ENOEXEC; |
710 | } | |
2600990e | 711 | |
535237ce JC |
712 | t = list_first_entry(&v->tc, struct tc, tc); |
713 | ||
e01402b1 | 714 | /* Put MVPE's into 'configuration state' */ |
340ee4b9 | 715 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 716 | |
e01402b1 RB |
717 | settc(t->index); |
718 | ||
e01402b1 RB |
719 | /* should check it is halted, and not activated */ |
720 | if ((read_tc_c0_tcstatus() & TCSTATUS_A) || !(read_tc_c0_tchalt() & TCHALT_H)) { | |
07cc0c9e RB |
721 | evpe(vpeflags); |
722 | emt(dmt_flag); | |
723 | local_irq_restore(flags); | |
724 | ||
725 | printk(KERN_WARNING "VPE loader: TC %d is already active!\n", | |
e01402b1 | 726 | t->index); |
07cc0c9e | 727 | |
e01402b1 RB |
728 | return -ENOEXEC; |
729 | } | |
730 | ||
731 | /* Write the address we want it to start running from in the TCPC register. */ | |
732 | write_tc_c0_tcrestart((unsigned long)v->__start); | |
e01402b1 | 733 | write_tc_c0_tccontext((unsigned long)0); |
07cc0c9e | 734 | |
2600990e RB |
735 | /* |
736 | * Mark the TC as activated, not interrupt exempt and not dynamically | |
737 | * allocatable | |
738 | */ | |
e01402b1 RB |
739 | val = read_tc_c0_tcstatus(); |
740 | val = (val & ~(TCSTATUS_DA | TCSTATUS_IXMT)) | TCSTATUS_A; | |
741 | write_tc_c0_tcstatus(val); | |
742 | ||
743 | write_tc_c0_tchalt(read_tc_c0_tchalt() & ~TCHALT_H); | |
744 | ||
e01402b1 RB |
745 | /* |
746 | * The sde-kit passes 'memsize' to __start in $a3, so set something | |
2600990e | 747 | * here... Or set $a3 to zero and define DFLT_STACK_SIZE and |
e01402b1 RB |
748 | * DFLT_HEAP_SIZE when you compile your program |
749 | */ | |
41790e04 | 750 | mttgpr(6, v->ntcs); |
07cc0c9e | 751 | mttgpr(7, physical_memsize); |
2600990e RB |
752 | |
753 | /* set up VPE1 */ | |
754 | /* | |
755 | * bind the TC to VPE 1 as late as possible so we only have the final | |
756 | * VPE registers to set up, and so an EJTAG probe can trigger on it | |
757 | */ | |
07cc0c9e | 758 | write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | 1); |
e01402b1 | 759 | |
a94d7020 EO |
760 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~(VPECONF0_VPA)); |
761 | ||
762 | back_to_back_c0_hazard(); | |
763 | ||
e0daad44 RB |
764 | /* Set up the XTC bit in vpeconf0 to point at our tc */ |
765 | write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC)) | |
70342287 | 766 | | (t->index << VPECONF0_XTC_SHIFT)); |
e01402b1 | 767 | |
a94d7020 EO |
768 | back_to_back_c0_hazard(); |
769 | ||
e0daad44 RB |
770 | /* enable this VPE */ |
771 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); | |
e01402b1 RB |
772 | |
773 | /* clear out any left overs from a previous program */ | |
2600990e | 774 | write_vpe_c0_status(0); |
e01402b1 RB |
775 | write_vpe_c0_cause(0); |
776 | ||
777 | /* take system out of configuration state */ | |
340ee4b9 | 778 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 779 | |
b618336a KK |
780 | /* |
781 | * SMTC/SMVP kernels manage VPE enable independently, | |
782 | * but uniprocessor kernels need to turn it on, even | |
783 | * if that wasn't the pre-dvpe() state. | |
784 | */ | |
07cc0c9e | 785 | #ifdef CONFIG_SMP |
07cc0c9e | 786 | evpe(vpeflags); |
b618336a KK |
787 | #else |
788 | evpe(EVPE_ENABLE); | |
07cc0c9e RB |
789 | #endif |
790 | emt(dmt_flag); | |
791 | local_irq_restore(flags); | |
e01402b1 | 792 | |
07cc0c9e RB |
793 | list_for_each_entry(n, &v->notify, list) |
794 | n->start(minor); | |
2600990e | 795 | |
e01402b1 RB |
796 | return 0; |
797 | } | |
798 | ||
2600990e | 799 | static int find_vpe_symbols(struct vpe * v, Elf_Shdr * sechdrs, |
e01402b1 RB |
800 | unsigned int symindex, const char *strtab, |
801 | struct module *mod) | |
802 | { | |
803 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
804 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
805 | ||
806 | for (i = 1; i < n; i++) { | |
807 | if (strcmp(strtab + sym[i].st_name, "__start") == 0) { | |
808 | v->__start = sym[i].st_value; | |
809 | } | |
810 | ||
811 | if (strcmp(strtab + sym[i].st_name, "vpe_shared") == 0) { | |
812 | v->shared_ptr = (void *)sym[i].st_value; | |
813 | } | |
814 | } | |
815 | ||
2600990e RB |
816 | if ( (v->__start == 0) || (v->shared_ptr == NULL)) |
817 | return -1; | |
818 | ||
e01402b1 RB |
819 | return 0; |
820 | } | |
821 | ||
307bd284 | 822 | /* |
2600990e RB |
823 | * Allocates a VPE with some program code space(the load address), copies the |
824 | * contents of the program (p)buffer performing relocatations/etc, free's it | |
825 | * when finished. | |
826 | */ | |
be6e1437 | 827 | static int vpe_elfload(struct vpe * v) |
e01402b1 RB |
828 | { |
829 | Elf_Ehdr *hdr; | |
830 | Elf_Shdr *sechdrs; | |
831 | long err = 0; | |
832 | char *secstrings, *strtab = NULL; | |
2600990e | 833 | unsigned int len, i, symindex = 0, strindex = 0, relocate = 0; |
e01402b1 RB |
834 | struct module mod; // so we can re-use the relocations code |
835 | ||
836 | memset(&mod, 0, sizeof(struct module)); | |
2600990e | 837 | strcpy(mod.name, "VPE loader"); |
e01402b1 RB |
838 | |
839 | hdr = (Elf_Ehdr *) v->pbuffer; | |
840 | len = v->plen; | |
841 | ||
842 | /* Sanity checks against insmoding binaries or wrong arch, | |
843 | weird elf version */ | |
d303f4a1 | 844 | if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0 |
2600990e RB |
845 | || (hdr->e_type != ET_REL && hdr->e_type != ET_EXEC) |
846 | || !elf_check_arch(hdr) | |
e01402b1 RB |
847 | || hdr->e_shentsize != sizeof(*sechdrs)) { |
848 | printk(KERN_WARNING | |
2600990e | 849 | "VPE loader: program wrong arch or weird elf version\n"); |
e01402b1 RB |
850 | |
851 | return -ENOEXEC; | |
852 | } | |
853 | ||
2600990e RB |
854 | if (hdr->e_type == ET_REL) |
855 | relocate = 1; | |
856 | ||
e01402b1 | 857 | if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) { |
2600990e RB |
858 | printk(KERN_ERR "VPE loader: program length %u truncated\n", |
859 | len); | |
860 | ||
e01402b1 RB |
861 | return -ENOEXEC; |
862 | } | |
863 | ||
864 | /* Convenience variables */ | |
865 | sechdrs = (void *)hdr + hdr->e_shoff; | |
866 | secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; | |
867 | sechdrs[0].sh_addr = 0; | |
868 | ||
869 | /* And these should exist, but gcc whinges if we don't init them */ | |
870 | symindex = strindex = 0; | |
871 | ||
2600990e RB |
872 | if (relocate) { |
873 | for (i = 1; i < hdr->e_shnum; i++) { | |
874 | if (sechdrs[i].sh_type != SHT_NOBITS | |
875 | && len < sechdrs[i].sh_offset + sechdrs[i].sh_size) { | |
876 | printk(KERN_ERR "VPE program length %u truncated\n", | |
877 | len); | |
878 | return -ENOEXEC; | |
879 | } | |
e01402b1 | 880 | |
2600990e RB |
881 | /* Mark all sections sh_addr with their address in the |
882 | temporary image. */ | |
883 | sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; | |
e01402b1 | 884 | |
2600990e RB |
885 | /* Internal symbols and strings. */ |
886 | if (sechdrs[i].sh_type == SHT_SYMTAB) { | |
887 | symindex = i; | |
888 | strindex = sechdrs[i].sh_link; | |
889 | strtab = (char *)hdr + sechdrs[strindex].sh_offset; | |
890 | } | |
e01402b1 | 891 | } |
2600990e | 892 | layout_sections(&mod, hdr, sechdrs, secstrings); |
e01402b1 RB |
893 | } |
894 | ||
e01402b1 | 895 | v->load_addr = alloc_progmem(mod.core_size); |
5408c490 RB |
896 | if (!v->load_addr) |
897 | return -ENOMEM; | |
e01402b1 | 898 | |
5408c490 | 899 | pr_info("VPE loader: loading to %p\n", v->load_addr); |
e01402b1 | 900 | |
2600990e RB |
901 | if (relocate) { |
902 | for (i = 0; i < hdr->e_shnum; i++) { | |
903 | void *dest; | |
e01402b1 | 904 | |
2600990e RB |
905 | if (!(sechdrs[i].sh_flags & SHF_ALLOC)) |
906 | continue; | |
e01402b1 | 907 | |
2600990e | 908 | dest = v->load_addr + sechdrs[i].sh_entsize; |
e01402b1 | 909 | |
2600990e RB |
910 | if (sechdrs[i].sh_type != SHT_NOBITS) |
911 | memcpy(dest, (void *)sechdrs[i].sh_addr, | |
912 | sechdrs[i].sh_size); | |
913 | /* Update sh_addr to point to copy in image. */ | |
914 | sechdrs[i].sh_addr = (unsigned long)dest; | |
e01402b1 | 915 | |
2600990e RB |
916 | printk(KERN_DEBUG " section sh_name %s sh_addr 0x%x\n", |
917 | secstrings + sechdrs[i].sh_name, sechdrs[i].sh_addr); | |
918 | } | |
e01402b1 | 919 | |
70342287 RB |
920 | /* Fix up syms, so that st_value is a pointer to location. */ |
921 | simplify_symbols(sechdrs, symindex, strtab, secstrings, | |
922 | hdr->e_shnum, &mod); | |
923 | ||
924 | /* Now do relocations. */ | |
925 | for (i = 1; i < hdr->e_shnum; i++) { | |
926 | const char *strtab = (char *)sechdrs[strindex].sh_addr; | |
927 | unsigned int info = sechdrs[i].sh_info; | |
928 | ||
929 | /* Not a valid relocation section? */ | |
930 | if (info >= hdr->e_shnum) | |
931 | continue; | |
932 | ||
933 | /* Don't bother with non-allocated sections */ | |
934 | if (!(sechdrs[info].sh_flags & SHF_ALLOC)) | |
935 | continue; | |
936 | ||
937 | if (sechdrs[i].sh_type == SHT_REL) | |
938 | err = apply_relocations(sechdrs, strtab, symindex, i, | |
939 | &mod); | |
940 | else if (sechdrs[i].sh_type == SHT_RELA) | |
941 | err = apply_relocate_add(sechdrs, strtab, symindex, i, | |
942 | &mod); | |
943 | if (err < 0) | |
944 | return err; | |
945 | ||
946 | } | |
947 | } else { | |
bdf5d42c | 948 | struct elf_phdr *phdr = (struct elf_phdr *) ((char *)hdr + hdr->e_phoff); |
2600990e | 949 | |
bdf5d42c | 950 | for (i = 0; i < hdr->e_phnum; i++) { |
b618336a KK |
951 | if (phdr->p_type == PT_LOAD) { |
952 | memcpy((void *)phdr->p_paddr, | |
953 | (char *)hdr + phdr->p_offset, | |
954 | phdr->p_filesz); | |
955 | memset((void *)phdr->p_paddr + phdr->p_filesz, | |
956 | 0, phdr->p_memsz - phdr->p_filesz); | |
957 | } | |
958 | phdr++; | |
bdf5d42c RB |
959 | } |
960 | ||
961 | for (i = 0; i < hdr->e_shnum; i++) { | |
70342287 RB |
962 | /* Internal symbols and strings. */ |
963 | if (sechdrs[i].sh_type == SHT_SYMTAB) { | |
964 | symindex = i; | |
965 | strindex = sechdrs[i].sh_link; | |
966 | strtab = (char *)hdr + sechdrs[strindex].sh_offset; | |
967 | ||
968 | /* mark the symtab's address for when we try to find the | |
969 | magic symbols */ | |
970 | sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; | |
971 | } | |
e01402b1 RB |
972 | } |
973 | } | |
974 | ||
975 | /* make sure it's physically written out */ | |
976 | flush_icache_range((unsigned long)v->load_addr, | |
977 | (unsigned long)v->load_addr + v->len); | |
978 | ||
979 | if ((find_vpe_symbols(v, sechdrs, symindex, strtab, &mod)) < 0) { | |
2600990e RB |
980 | if (v->__start == 0) { |
981 | printk(KERN_WARNING "VPE loader: program does not contain " | |
982 | "a __start symbol\n"); | |
983 | return -ENOEXEC; | |
984 | } | |
e01402b1 | 985 | |
2600990e RB |
986 | if (v->shared_ptr == NULL) |
987 | printk(KERN_WARNING "VPE loader: " | |
988 | "program does not contain vpe_shared symbol.\n" | |
989 | " Unable to use AMVP (AP/SP) facilities.\n"); | |
e01402b1 RB |
990 | } |
991 | ||
992 | printk(" elf loaded\n"); | |
2600990e | 993 | return 0; |
e01402b1 RB |
994 | } |
995 | ||
2600990e RB |
996 | static void cleanup_tc(struct tc *tc) |
997 | { | |
07cc0c9e RB |
998 | unsigned long flags; |
999 | unsigned int mtflags, vpflags; | |
2600990e RB |
1000 | int tmp; |
1001 | ||
07cc0c9e RB |
1002 | local_irq_save(flags); |
1003 | mtflags = dmt(); | |
1004 | vpflags = dvpe(); | |
2600990e RB |
1005 | /* Put MVPE's into 'configuration state' */ |
1006 | set_c0_mvpcontrol(MVPCONTROL_VPC); | |
1007 | ||
1008 | settc(tc->index); | |
1009 | tmp = read_tc_c0_tcstatus(); | |
1010 | ||
1011 | /* mark not allocated and not dynamically allocatable */ | |
1012 | tmp &= ~(TCSTATUS_A | TCSTATUS_DA); | |
1013 | tmp |= TCSTATUS_IXMT; /* interrupt exempt */ | |
1014 | write_tc_c0_tcstatus(tmp); | |
1015 | ||
1016 | write_tc_c0_tchalt(TCHALT_H); | |
7c3a622d | 1017 | mips_ihb(); |
2600990e RB |
1018 | |
1019 | /* bind it to anything other than VPE1 */ | |
07cc0c9e | 1020 | // write_tc_c0_tcbind(read_tc_c0_tcbind() & ~TCBIND_CURVPE); // | TCBIND_CURVPE |
2600990e RB |
1021 | |
1022 | clear_c0_mvpcontrol(MVPCONTROL_VPC); | |
07cc0c9e RB |
1023 | evpe(vpflags); |
1024 | emt(mtflags); | |
1025 | local_irq_restore(flags); | |
2600990e RB |
1026 | } |
1027 | ||
1028 | static int getcwd(char *buff, int size) | |
1029 | { | |
1030 | mm_segment_t old_fs; | |
1031 | int ret; | |
1032 | ||
1033 | old_fs = get_fs(); | |
1034 | set_fs(KERNEL_DS); | |
1035 | ||
21a151d8 | 1036 | ret = sys_getcwd(buff, size); |
2600990e RB |
1037 | |
1038 | set_fs(old_fs); | |
1039 | ||
1040 | return ret; | |
1041 | } | |
1042 | ||
70342287 | 1043 | /* checks VPE is unused and gets ready to load program */ |
e01402b1 RB |
1044 | static int vpe_open(struct inode *inode, struct file *filp) |
1045 | { | |
c4c4018b | 1046 | enum vpe_state state; |
2600990e | 1047 | struct vpe_notifications *not; |
07cc0c9e | 1048 | struct vpe *v; |
1bbfc20d | 1049 | int ret; |
e01402b1 | 1050 | |
07cc0c9e RB |
1051 | if (minor != iminor(inode)) { |
1052 | /* assume only 1 device at the moment. */ | |
1bbfc20d RB |
1053 | pr_warning("VPE loader: only vpe1 is supported\n"); |
1054 | ||
1055 | return -ENODEV; | |
e01402b1 RB |
1056 | } |
1057 | ||
07cc0c9e | 1058 | if ((v = get_vpe(tclimit)) == NULL) { |
1bbfc20d RB |
1059 | pr_warning("VPE loader: unable to get vpe\n"); |
1060 | ||
1061 | return -ENODEV; | |
e01402b1 RB |
1062 | } |
1063 | ||
c4c4018b RB |
1064 | state = xchg(&v->state, VPE_STATE_INUSE); |
1065 | if (state != VPE_STATE_UNUSED) { | |
2600990e | 1066 | printk(KERN_DEBUG "VPE loader: tc in use dumping regs\n"); |
e01402b1 | 1067 | |
2600990e | 1068 | list_for_each_entry(not, &v->notify, list) { |
07cc0c9e | 1069 | not->stop(tclimit); |
2600990e | 1070 | } |
e01402b1 | 1071 | |
2600990e | 1072 | release_progmem(v->load_addr); |
07cc0c9e | 1073 | cleanup_tc(get_tc(tclimit)); |
e01402b1 RB |
1074 | } |
1075 | ||
e01402b1 RB |
1076 | /* this of-course trashes what was there before... */ |
1077 | v->pbuffer = vmalloc(P_SIZE); | |
863abad4 JJ |
1078 | if (!v->pbuffer) { |
1079 | pr_warning("VPE loader: unable to allocate memory\n"); | |
1080 | return -ENOMEM; | |
1081 | } | |
e01402b1 RB |
1082 | v->plen = P_SIZE; |
1083 | v->load_addr = NULL; | |
1084 | v->len = 0; | |
1085 | ||
d76b0d9b DH |
1086 | v->uid = filp->f_cred->fsuid; |
1087 | v->gid = filp->f_cred->fsgid; | |
2600990e | 1088 | |
2600990e RB |
1089 | v->cwd[0] = 0; |
1090 | ret = getcwd(v->cwd, VPE_PATH_MAX); | |
1091 | if (ret < 0) | |
1092 | printk(KERN_WARNING "VPE loader: open, getcwd returned %d\n", ret); | |
1093 | ||
1094 | v->shared_ptr = NULL; | |
1095 | v->__start = 0; | |
07cc0c9e | 1096 | |
e01402b1 RB |
1097 | return 0; |
1098 | } | |
1099 | ||
1100 | static int vpe_release(struct inode *inode, struct file *filp) | |
1101 | { | |
307bd284 | 1102 | struct vpe *v; |
e01402b1 | 1103 | Elf_Ehdr *hdr; |
07cc0c9e | 1104 | int ret = 0; |
e01402b1 | 1105 | |
07cc0c9e RB |
1106 | v = get_vpe(tclimit); |
1107 | if (v == NULL) | |
e01402b1 RB |
1108 | return -ENODEV; |
1109 | ||
e01402b1 | 1110 | hdr = (Elf_Ehdr *) v->pbuffer; |
d303f4a1 | 1111 | if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) == 0) { |
07cc0c9e | 1112 | if (vpe_elfload(v) >= 0) { |
e01402b1 | 1113 | vpe_run(v); |
07cc0c9e | 1114 | } else { |
70342287 | 1115 | printk(KERN_WARNING "VPE loader: ELF load failed.\n"); |
e01402b1 RB |
1116 | ret = -ENOEXEC; |
1117 | } | |
1118 | } else { | |
70342287 | 1119 | printk(KERN_WARNING "VPE loader: only elf files are supported\n"); |
e01402b1 RB |
1120 | ret = -ENOEXEC; |
1121 | } | |
1122 | ||
2600990e RB |
1123 | /* It's good to be able to run the SP and if it chokes have a look at |
1124 | the /dev/rt?. But if we reset the pointer to the shared struct we | |
8ebcfc8b | 1125 | lose what has happened. So perhaps if garbage is sent to the vpe |
2600990e RB |
1126 | device, use it as a trigger for the reset. Hopefully a nice |
1127 | executable will be along shortly. */ | |
1128 | if (ret < 0) | |
1129 | v->shared_ptr = NULL; | |
1130 | ||
863abad4 | 1131 | vfree(v->pbuffer); |
e01402b1 | 1132 | v->plen = 0; |
863abad4 | 1133 | |
e01402b1 RB |
1134 | return ret; |
1135 | } | |
1136 | ||
1137 | static ssize_t vpe_write(struct file *file, const char __user * buffer, | |
1138 | size_t count, loff_t * ppos) | |
1139 | { | |
e01402b1 | 1140 | size_t ret = count; |
307bd284 | 1141 | struct vpe *v; |
e01402b1 | 1142 | |
496ad9aa | 1143 | if (iminor(file_inode(file)) != minor) |
07cc0c9e RB |
1144 | return -ENODEV; |
1145 | ||
1146 | v = get_vpe(tclimit); | |
1147 | if (v == NULL) | |
e01402b1 RB |
1148 | return -ENODEV; |
1149 | ||
e01402b1 RB |
1150 | if ((count + v->len) > v->plen) { |
1151 | printk(KERN_WARNING | |
2600990e | 1152 | "VPE loader: elf size too big. Perhaps strip uneeded symbols\n"); |
e01402b1 RB |
1153 | return -ENOMEM; |
1154 | } | |
1155 | ||
1156 | count -= copy_from_user(v->pbuffer + v->len, buffer, count); | |
2600990e | 1157 | if (!count) |
e01402b1 | 1158 | return -EFAULT; |
e01402b1 RB |
1159 | |
1160 | v->len += count; | |
1161 | return ret; | |
1162 | } | |
1163 | ||
5dfe4c96 | 1164 | static const struct file_operations vpe_fops = { |
e01402b1 RB |
1165 | .owner = THIS_MODULE, |
1166 | .open = vpe_open, | |
1167 | .release = vpe_release, | |
6038f373 AB |
1168 | .write = vpe_write, |
1169 | .llseek = noop_llseek, | |
e01402b1 RB |
1170 | }; |
1171 | ||
1172 | /* module wrapper entry points */ | |
1173 | /* give me a vpe */ | |
1174 | vpe_handle vpe_alloc(void) | |
1175 | { | |
1176 | int i; | |
1177 | struct vpe *v; | |
1178 | ||
1179 | /* find a vpe */ | |
1180 | for (i = 1; i < MAX_VPES; i++) { | |
1181 | if ((v = get_vpe(i)) != NULL) { | |
1182 | v->state = VPE_STATE_INUSE; | |
1183 | return v; | |
1184 | } | |
1185 | } | |
1186 | return NULL; | |
1187 | } | |
1188 | ||
1189 | EXPORT_SYMBOL(vpe_alloc); | |
1190 | ||
1191 | /* start running from here */ | |
1192 | int vpe_start(vpe_handle vpe, unsigned long start) | |
1193 | { | |
1194 | struct vpe *v = vpe; | |
1195 | ||
1196 | v->__start = start; | |
1197 | return vpe_run(v); | |
1198 | } | |
1199 | ||
1200 | EXPORT_SYMBOL(vpe_start); | |
1201 | ||
1202 | /* halt it for now */ | |
1203 | int vpe_stop(vpe_handle vpe) | |
1204 | { | |
1205 | struct vpe *v = vpe; | |
1206 | struct tc *t; | |
1207 | unsigned int evpe_flags; | |
1208 | ||
1209 | evpe_flags = dvpe(); | |
1210 | ||
1211 | if ((t = list_entry(v->tc.next, struct tc, tc)) != NULL) { | |
1212 | ||
1213 | settc(t->index); | |
1214 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); | |
1215 | } | |
1216 | ||
1217 | evpe(evpe_flags); | |
1218 | ||
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | EXPORT_SYMBOL(vpe_stop); | |
1223 | ||
1224 | /* I've done with it thank you */ | |
1225 | int vpe_free(vpe_handle vpe) | |
1226 | { | |
1227 | struct vpe *v = vpe; | |
1228 | struct tc *t; | |
1229 | unsigned int evpe_flags; | |
1230 | ||
1231 | if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { | |
1232 | return -ENOEXEC; | |
1233 | } | |
1234 | ||
1235 | evpe_flags = dvpe(); | |
1236 | ||
1237 | /* Put MVPE's into 'configuration state' */ | |
340ee4b9 | 1238 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1239 | |
1240 | settc(t->index); | |
1241 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); | |
1242 | ||
7c3a622d | 1243 | /* halt the TC */ |
e01402b1 | 1244 | write_tc_c0_tchalt(TCHALT_H); |
7c3a622d NS |
1245 | mips_ihb(); |
1246 | ||
1247 | /* mark the TC unallocated */ | |
1248 | write_tc_c0_tcstatus(read_tc_c0_tcstatus() & ~TCSTATUS_A); | |
e01402b1 RB |
1249 | |
1250 | v->state = VPE_STATE_UNUSED; | |
1251 | ||
340ee4b9 | 1252 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1253 | evpe(evpe_flags); |
1254 | ||
1255 | return 0; | |
1256 | } | |
1257 | ||
1258 | EXPORT_SYMBOL(vpe_free); | |
1259 | ||
1260 | void *vpe_get_shared(int index) | |
1261 | { | |
1262 | struct vpe *v; | |
1263 | ||
2600990e | 1264 | if ((v = get_vpe(index)) == NULL) |
e01402b1 | 1265 | return NULL; |
e01402b1 RB |
1266 | |
1267 | return v->shared_ptr; | |
1268 | } | |
1269 | ||
1270 | EXPORT_SYMBOL(vpe_get_shared); | |
1271 | ||
2600990e RB |
1272 | int vpe_getuid(int index) |
1273 | { | |
1274 | struct vpe *v; | |
1275 | ||
1276 | if ((v = get_vpe(index)) == NULL) | |
1277 | return -1; | |
1278 | ||
1279 | return v->uid; | |
1280 | } | |
1281 | ||
1282 | EXPORT_SYMBOL(vpe_getuid); | |
1283 | ||
1284 | int vpe_getgid(int index) | |
1285 | { | |
1286 | struct vpe *v; | |
1287 | ||
1288 | if ((v = get_vpe(index)) == NULL) | |
1289 | return -1; | |
1290 | ||
1291 | return v->gid; | |
1292 | } | |
1293 | ||
1294 | EXPORT_SYMBOL(vpe_getgid); | |
1295 | ||
1296 | int vpe_notify(int index, struct vpe_notifications *notify) | |
1297 | { | |
1298 | struct vpe *v; | |
1299 | ||
1300 | if ((v = get_vpe(index)) == NULL) | |
1301 | return -1; | |
1302 | ||
1303 | list_add(¬ify->list, &v->notify); | |
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | EXPORT_SYMBOL(vpe_notify); | |
1308 | ||
1309 | char *vpe_getcwd(int index) | |
1310 | { | |
1311 | struct vpe *v; | |
1312 | ||
1313 | if ((v = get_vpe(index)) == NULL) | |
1314 | return NULL; | |
1315 | ||
1316 | return v->cwd; | |
1317 | } | |
1318 | ||
1319 | EXPORT_SYMBOL(vpe_getcwd); | |
1320 | ||
736fad17 KS |
1321 | static ssize_t store_kill(struct device *dev, struct device_attribute *attr, |
1322 | const char *buf, size_t len) | |
0f5d0df3 RB |
1323 | { |
1324 | struct vpe *vpe = get_vpe(tclimit); | |
1325 | struct vpe_notifications *not; | |
1326 | ||
1327 | list_for_each_entry(not, &vpe->notify, list) { | |
1328 | not->stop(tclimit); | |
1329 | } | |
1330 | ||
1331 | release_progmem(vpe->load_addr); | |
1332 | cleanup_tc(get_tc(tclimit)); | |
1333 | vpe_stop(vpe); | |
1334 | vpe_free(vpe); | |
1335 | ||
1336 | return len; | |
1337 | } | |
567b21e9 | 1338 | static DEVICE_ATTR(kill, S_IWUSR, NULL, store_kill); |
0f5d0df3 | 1339 | |
567b21e9 | 1340 | static ssize_t ntcs_show(struct device *cd, struct device_attribute *attr, |
736fad17 | 1341 | char *buf) |
41790e04 RB |
1342 | { |
1343 | struct vpe *vpe = get_vpe(tclimit); | |
1344 | ||
1345 | return sprintf(buf, "%d\n", vpe->ntcs); | |
1346 | } | |
1347 | ||
567b21e9 | 1348 | static ssize_t ntcs_store(struct device *dev, struct device_attribute *attr, |
736fad17 | 1349 | const char *buf, size_t len) |
41790e04 RB |
1350 | { |
1351 | struct vpe *vpe = get_vpe(tclimit); | |
1352 | unsigned long new; | |
1353 | char *endp; | |
1354 | ||
1355 | new = simple_strtoul(buf, &endp, 0); | |
1356 | if (endp == buf) | |
1357 | goto out_einval; | |
1358 | ||
1359 | if (new == 0 || new > (hw_tcs - tclimit)) | |
1360 | goto out_einval; | |
1361 | ||
1362 | vpe->ntcs = new; | |
1363 | ||
1364 | return len; | |
1365 | ||
1366 | out_einval: | |
52a7a27c | 1367 | return -EINVAL; |
41790e04 | 1368 | } |
567b21e9 | 1369 | static DEVICE_ATTR_RW(ntcs); |
41790e04 | 1370 | |
567b21e9 GKH |
1371 | static struct attribute vpe_attrs[] = { |
1372 | &dev_attr_kill.attr, | |
1373 | &dev_attr_ntcs.attr, | |
1374 | NULL, | |
41790e04 | 1375 | }; |
567b21e9 | 1376 | ATTRIBUTE_GROUPS(vpe); |
41790e04 | 1377 | |
736fad17 | 1378 | static void vpe_device_release(struct device *cd) |
41790e04 RB |
1379 | { |
1380 | kfree(cd); | |
1381 | } | |
1382 | ||
1383 | struct class vpe_class = { | |
1384 | .name = "vpe", | |
1385 | .owner = THIS_MODULE, | |
736fad17 | 1386 | .dev_release = vpe_device_release, |
567b21e9 | 1387 | .dev_groups = vpe_groups, |
41790e04 RB |
1388 | }; |
1389 | ||
736fad17 | 1390 | struct device vpe_device; |
27a3bbaf | 1391 | |
e01402b1 RB |
1392 | static int __init vpe_module_init(void) |
1393 | { | |
07cc0c9e | 1394 | unsigned int mtflags, vpflags; |
07cc0c9e | 1395 | unsigned long flags, val; |
e01402b1 RB |
1396 | struct vpe *v = NULL; |
1397 | struct tc *t; | |
41790e04 | 1398 | int tc, err; |
e01402b1 RB |
1399 | |
1400 | if (!cpu_has_mipsmt) { | |
1401 | printk("VPE loader: not a MIPS MT capable processor\n"); | |
1402 | return -ENODEV; | |
1403 | } | |
1404 | ||
07cc0c9e RB |
1405 | if (vpelimit == 0) { |
1406 | printk(KERN_WARNING "No VPEs reserved for AP/SP, not " | |
1407 | "initializing VPE loader.\nPass maxvpes=<n> argument as " | |
1408 | "kernel argument\n"); | |
1409 | ||
1410 | return -ENODEV; | |
1411 | } | |
1412 | ||
1413 | if (tclimit == 0) { | |
1414 | printk(KERN_WARNING "No TCs reserved for AP/SP, not " | |
1415 | "initializing VPE loader.\nPass maxtcs=<n> argument as " | |
1416 | "kernel argument\n"); | |
1417 | ||
1418 | return -ENODEV; | |
1419 | } | |
1420 | ||
682e852e AD |
1421 | major = register_chrdev(0, module_name, &vpe_fops); |
1422 | if (major < 0) { | |
e01402b1 | 1423 | printk("VPE loader: unable to register character device\n"); |
307bd284 | 1424 | return major; |
e01402b1 RB |
1425 | } |
1426 | ||
41790e04 RB |
1427 | err = class_register(&vpe_class); |
1428 | if (err) { | |
1429 | printk(KERN_ERR "vpe_class registration failed\n"); | |
27a3bbaf RB |
1430 | goto out_chrdev; |
1431 | } | |
41790e04 | 1432 | |
736fad17 | 1433 | device_initialize(&vpe_device); |
41790e04 RB |
1434 | vpe_device.class = &vpe_class, |
1435 | vpe_device.parent = NULL, | |
1bb5beb4 | 1436 | dev_set_name(&vpe_device, "vpe1"); |
41790e04 | 1437 | vpe_device.devt = MKDEV(major, minor); |
736fad17 | 1438 | err = device_add(&vpe_device); |
41790e04 RB |
1439 | if (err) { |
1440 | printk(KERN_ERR "Adding vpe_device failed\n"); | |
1441 | goto out_class; | |
1442 | } | |
27a3bbaf | 1443 | |
07cc0c9e RB |
1444 | local_irq_save(flags); |
1445 | mtflags = dmt(); | |
1446 | vpflags = dvpe(); | |
e01402b1 RB |
1447 | |
1448 | /* Put MVPE's into 'configuration state' */ | |
340ee4b9 | 1449 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1450 | |
1451 | /* dump_mtregs(); */ | |
1452 | ||
e01402b1 | 1453 | val = read_c0_mvpconf0(); |
07cc0c9e RB |
1454 | hw_tcs = (val & MVPCONF0_PTC) + 1; |
1455 | hw_vpes = ((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1; | |
1456 | ||
1457 | for (tc = tclimit; tc < hw_tcs; tc++) { | |
1458 | /* | |
1459 | * Must re-enable multithreading temporarily or in case we | |
1460 | * reschedule send IPIs or similar we might hang. | |
1461 | */ | |
1462 | clear_c0_mvpcontrol(MVPCONTROL_VPC); | |
1463 | evpe(vpflags); | |
1464 | emt(mtflags); | |
1465 | local_irq_restore(flags); | |
1466 | t = alloc_tc(tc); | |
1467 | if (!t) { | |
1468 | err = -ENOMEM; | |
1469 | goto out; | |
1470 | } | |
1471 | ||
1472 | local_irq_save(flags); | |
1473 | mtflags = dmt(); | |
1474 | vpflags = dvpe(); | |
1475 | set_c0_mvpcontrol(MVPCONTROL_VPC); | |
e01402b1 RB |
1476 | |
1477 | /* VPE's */ | |
07cc0c9e RB |
1478 | if (tc < hw_tcs) { |
1479 | settc(tc); | |
e01402b1 | 1480 | |
07cc0c9e | 1481 | if ((v = alloc_vpe(tc)) == NULL) { |
e01402b1 | 1482 | printk(KERN_WARNING "VPE: unable to allocate VPE\n"); |
07cc0c9e RB |
1483 | |
1484 | goto out_reenable; | |
e01402b1 RB |
1485 | } |
1486 | ||
41790e04 RB |
1487 | v->ntcs = hw_tcs - tclimit; |
1488 | ||
2600990e RB |
1489 | /* add the tc to the list of this vpe's tc's. */ |
1490 | list_add(&t->tc, &v->tc); | |
e01402b1 RB |
1491 | |
1492 | /* deactivate all but vpe0 */ | |
07cc0c9e | 1493 | if (tc >= tclimit) { |
e01402b1 RB |
1494 | unsigned long tmp = read_vpe_c0_vpeconf0(); |
1495 | ||
1496 | tmp &= ~VPECONF0_VPA; | |
1497 | ||
1498 | /* master VPE */ | |
1499 | tmp |= VPECONF0_MVP; | |
1500 | write_vpe_c0_vpeconf0(tmp); | |
1501 | } | |
1502 | ||
1503 | /* disable multi-threading with TC's */ | |
1504 | write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() & ~VPECONTROL_TE); | |
1505 | ||
07cc0c9e | 1506 | if (tc >= vpelimit) { |
2600990e RB |
1507 | /* |
1508 | * Set config to be the same as vpe0, | |
1509 | * particularly kseg0 coherency alg | |
1510 | */ | |
e01402b1 RB |
1511 | write_vpe_c0_config(read_c0_config()); |
1512 | } | |
e01402b1 RB |
1513 | } |
1514 | ||
1515 | /* TC's */ | |
1516 | t->pvpe = v; /* set the parent vpe */ | |
1517 | ||
07cc0c9e | 1518 | if (tc >= tclimit) { |
e01402b1 RB |
1519 | unsigned long tmp; |
1520 | ||
07cc0c9e | 1521 | settc(tc); |
e01402b1 | 1522 | |
2600990e RB |
1523 | /* Any TC that is bound to VPE0 gets left as is - in case |
1524 | we are running SMTC on VPE0. A TC that is bound to any | |
1525 | other VPE gets bound to VPE0, ideally I'd like to make | |
1526 | it homeless but it doesn't appear to let me bind a TC | |
1527 | to a non-existent VPE. Which is perfectly reasonable. | |
1528 | ||
1529 | The (un)bound state is visible to an EJTAG probe so may | |
1530 | notify GDB... | |
1531 | */ | |
1532 | ||
1533 | if (((tmp = read_tc_c0_tcbind()) & TCBIND_CURVPE)) { | |
1534 | /* tc is bound >vpe0 */ | |
1535 | write_tc_c0_tcbind(tmp & ~TCBIND_CURVPE); | |
1536 | ||
1537 | t->pvpe = get_vpe(0); /* set the parent vpe */ | |
1538 | } | |
e01402b1 | 1539 | |
7c3a622d NS |
1540 | /* halt the TC */ |
1541 | write_tc_c0_tchalt(TCHALT_H); | |
1542 | mips_ihb(); | |
1543 | ||
e01402b1 RB |
1544 | tmp = read_tc_c0_tcstatus(); |
1545 | ||
2600990e | 1546 | /* mark not activated and not dynamically allocatable */ |
e01402b1 RB |
1547 | tmp &= ~(TCSTATUS_A | TCSTATUS_DA); |
1548 | tmp |= TCSTATUS_IXMT; /* interrupt exempt */ | |
1549 | write_tc_c0_tcstatus(tmp); | |
e01402b1 RB |
1550 | } |
1551 | } | |
1552 | ||
07cc0c9e | 1553 | out_reenable: |
e01402b1 | 1554 | /* release config state */ |
340ee4b9 | 1555 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 1556 | |
07cc0c9e RB |
1557 | evpe(vpflags); |
1558 | emt(mtflags); | |
1559 | local_irq_restore(flags); | |
1560 | ||
e01402b1 | 1561 | return 0; |
27a3bbaf | 1562 | |
41790e04 RB |
1563 | out_class: |
1564 | class_unregister(&vpe_class); | |
27a3bbaf RB |
1565 | out_chrdev: |
1566 | unregister_chrdev(major, module_name); | |
1567 | ||
07cc0c9e | 1568 | out: |
27a3bbaf | 1569 | return err; |
e01402b1 RB |
1570 | } |
1571 | ||
1572 | static void __exit vpe_module_exit(void) | |
1573 | { | |
1574 | struct vpe *v, *n; | |
1575 | ||
1bbfc20d RB |
1576 | device_del(&vpe_device); |
1577 | unregister_chrdev(major, module_name); | |
1578 | ||
1579 | /* No locking needed here */ | |
e01402b1 | 1580 | list_for_each_entry_safe(v, n, &vpecontrol.vpe_list, list) { |
1bbfc20d | 1581 | if (v->state != VPE_STATE_UNUSED) |
e01402b1 | 1582 | release_vpe(v); |
e01402b1 | 1583 | } |
e01402b1 RB |
1584 | } |
1585 | ||
1586 | module_init(vpe_module_init); | |
1587 | module_exit(vpe_module_exit); | |
1588 | MODULE_DESCRIPTION("MIPS VPE Loader"); | |
2600990e | 1589 | MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc."); |
e01402b1 | 1590 | MODULE_LICENSE("GPL"); |