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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. | |
22 | * The SP enviroment is rather simple, no tlb's. It needs to be relocatable | |
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/module.h> |
33 | #include <linux/fs.h> | |
34 | #include <linux/init.h> | |
35 | #include <asm/uaccess.h> | |
36 | #include <linux/slab.h> | |
37 | #include <linux/list.h> | |
38 | #include <linux/vmalloc.h> | |
39 | #include <linux/elf.h> | |
40 | #include <linux/seq_file.h> | |
7558da94 | 41 | #include <linux/smp_lock.h> |
e01402b1 RB |
42 | #include <linux/syscalls.h> |
43 | #include <linux/moduleloader.h> | |
44 | #include <linux/interrupt.h> | |
45 | #include <linux/poll.h> | |
46 | #include <linux/bootmem.h> | |
47 | #include <asm/mipsregs.h> | |
340ee4b9 | 48 | #include <asm/mipsmtregs.h> |
e01402b1 RB |
49 | #include <asm/cacheflush.h> |
50 | #include <asm/atomic.h> | |
51 | #include <asm/cpu.h> | |
27a3bbaf | 52 | #include <asm/mips_mt.h> |
e01402b1 RB |
53 | #include <asm/processor.h> |
54 | #include <asm/system.h> | |
2600990e RB |
55 | #include <asm/vpe.h> |
56 | #include <asm/kspd.h> | |
e01402b1 RB |
57 | |
58 | typedef void *vpe_handle; | |
59 | ||
e01402b1 RB |
60 | #ifndef ARCH_SHF_SMALL |
61 | #define ARCH_SHF_SMALL 0 | |
62 | #endif | |
63 | ||
64 | /* If this is set, the section belongs in the init part of the module */ | |
65 | #define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1)) | |
66 | ||
41790e04 RB |
67 | /* |
68 | * The number of TCs and VPEs physically available on the core | |
69 | */ | |
70 | static int hw_tcs, hw_vpes; | |
e01402b1 | 71 | static char module_name[] = "vpe"; |
307bd284 | 72 | static int major; |
27a3bbaf | 73 | static const int minor = 1; /* fixed for now */ |
e01402b1 | 74 | |
2600990e RB |
75 | #ifdef CONFIG_MIPS_APSP_KSPD |
76 | static struct kspd_notifications kspd_events; | |
77 | static int kspd_events_reqd = 0; | |
78 | #endif | |
79 | ||
e01402b1 RB |
80 | /* grab the likely amount of memory we will need. */ |
81 | #ifdef CONFIG_MIPS_VPE_LOADER_TOM | |
82 | #define P_SIZE (2 * 1024 * 1024) | |
83 | #else | |
84 | /* add an overhead to the max kmalloc size for non-striped symbols/etc */ | |
85 | #define P_SIZE (256 * 1024) | |
86 | #endif | |
87 | ||
2600990e RB |
88 | extern unsigned long physical_memsize; |
89 | ||
e01402b1 | 90 | #define MAX_VPES 16 |
2600990e | 91 | #define VPE_PATH_MAX 256 |
e01402b1 RB |
92 | |
93 | enum vpe_state { | |
94 | VPE_STATE_UNUSED = 0, | |
95 | VPE_STATE_INUSE, | |
96 | VPE_STATE_RUNNING | |
97 | }; | |
98 | ||
99 | enum tc_state { | |
100 | TC_STATE_UNUSED = 0, | |
101 | TC_STATE_INUSE, | |
102 | TC_STATE_RUNNING, | |
103 | TC_STATE_DYNAMIC | |
104 | }; | |
105 | ||
307bd284 | 106 | struct vpe { |
e01402b1 RB |
107 | enum vpe_state state; |
108 | ||
109 | /* (device) minor associated with this vpe */ | |
110 | int minor; | |
111 | ||
112 | /* elfloader stuff */ | |
113 | void *load_addr; | |
571e0bed | 114 | unsigned long len; |
e01402b1 | 115 | char *pbuffer; |
571e0bed | 116 | unsigned long plen; |
2600990e RB |
117 | unsigned int uid, gid; |
118 | char cwd[VPE_PATH_MAX]; | |
e01402b1 RB |
119 | |
120 | unsigned long __start; | |
121 | ||
122 | /* tc's associated with this vpe */ | |
123 | struct list_head tc; | |
124 | ||
125 | /* The list of vpe's */ | |
126 | struct list_head list; | |
127 | ||
128 | /* shared symbol address */ | |
129 | void *shared_ptr; | |
2600990e RB |
130 | |
131 | /* the list of who wants to know when something major happens */ | |
132 | struct list_head notify; | |
41790e04 RB |
133 | |
134 | unsigned int ntcs; | |
307bd284 RB |
135 | }; |
136 | ||
137 | struct tc { | |
138 | enum tc_state state; | |
139 | int index; | |
140 | ||
07cc0c9e RB |
141 | struct vpe *pvpe; /* parent VPE */ |
142 | struct list_head tc; /* The list of TC's with this VPE */ | |
143 | struct list_head list; /* The global list of tc's */ | |
307bd284 | 144 | }; |
e01402b1 | 145 | |
9cfdf6f1 | 146 | struct { |
e01402b1 RB |
147 | /* Virtual processing elements */ |
148 | struct list_head vpe_list; | |
149 | ||
150 | /* Thread contexts */ | |
151 | struct list_head tc_list; | |
9cfdf6f1 RB |
152 | } vpecontrol = { |
153 | .vpe_list = LIST_HEAD_INIT(vpecontrol.vpe_list), | |
154 | .tc_list = LIST_HEAD_INIT(vpecontrol.tc_list) | |
155 | }; | |
e01402b1 RB |
156 | |
157 | static void release_progmem(void *ptr); | |
e01402b1 RB |
158 | extern void save_gp_address(unsigned int secbase, unsigned int rel); |
159 | ||
160 | /* get the vpe associated with this minor */ | |
161 | struct vpe *get_vpe(int minor) | |
162 | { | |
163 | struct vpe *v; | |
164 | ||
2600990e RB |
165 | if (!cpu_has_mipsmt) |
166 | return NULL; | |
167 | ||
e01402b1 RB |
168 | list_for_each_entry(v, &vpecontrol.vpe_list, list) { |
169 | if (v->minor == minor) | |
170 | return v; | |
171 | } | |
172 | ||
e01402b1 RB |
173 | return NULL; |
174 | } | |
175 | ||
176 | /* get the vpe associated with this minor */ | |
177 | struct tc *get_tc(int index) | |
178 | { | |
179 | struct tc *t; | |
180 | ||
181 | list_for_each_entry(t, &vpecontrol.tc_list, list) { | |
182 | if (t->index == index) | |
183 | return t; | |
184 | } | |
185 | ||
e01402b1 RB |
186 | return NULL; |
187 | } | |
188 | ||
189 | struct tc *get_tc_unused(void) | |
190 | { | |
191 | struct tc *t; | |
192 | ||
193 | list_for_each_entry(t, &vpecontrol.tc_list, list) { | |
194 | if (t->state == TC_STATE_UNUSED) | |
195 | return t; | |
196 | } | |
197 | ||
e01402b1 RB |
198 | return NULL; |
199 | } | |
200 | ||
201 | /* allocate a vpe and associate it with this minor (or index) */ | |
202 | struct vpe *alloc_vpe(int minor) | |
203 | { | |
204 | struct vpe *v; | |
205 | ||
307bd284 | 206 | if ((v = kzalloc(sizeof(struct vpe), GFP_KERNEL)) == NULL) { |
e01402b1 RB |
207 | return NULL; |
208 | } | |
209 | ||
e01402b1 RB |
210 | INIT_LIST_HEAD(&v->tc); |
211 | list_add_tail(&v->list, &vpecontrol.vpe_list); | |
212 | ||
2600990e | 213 | INIT_LIST_HEAD(&v->notify); |
e01402b1 RB |
214 | v->minor = minor; |
215 | return v; | |
216 | } | |
217 | ||
218 | /* allocate a tc. At startup only tc0 is running, all other can be halted. */ | |
219 | struct tc *alloc_tc(int index) | |
220 | { | |
07cc0c9e | 221 | struct tc *tc; |
e01402b1 | 222 | |
07cc0c9e RB |
223 | if ((tc = kzalloc(sizeof(struct tc), GFP_KERNEL)) == NULL) |
224 | goto out; | |
e01402b1 | 225 | |
07cc0c9e RB |
226 | INIT_LIST_HEAD(&tc->tc); |
227 | tc->index = index; | |
228 | list_add_tail(&tc->list, &vpecontrol.tc_list); | |
e01402b1 | 229 | |
07cc0c9e RB |
230 | out: |
231 | return tc; | |
e01402b1 RB |
232 | } |
233 | ||
234 | /* clean up and free everything */ | |
235 | void release_vpe(struct vpe *v) | |
236 | { | |
237 | list_del(&v->list); | |
238 | if (v->load_addr) | |
239 | release_progmem(v); | |
240 | kfree(v); | |
241 | } | |
242 | ||
243 | void dump_mtregs(void) | |
244 | { | |
245 | unsigned long val; | |
246 | ||
247 | val = read_c0_config3(); | |
248 | printk("config3 0x%lx MT %ld\n", val, | |
249 | (val & CONFIG3_MT) >> CONFIG3_MT_SHIFT); | |
250 | ||
e01402b1 RB |
251 | val = read_c0_mvpcontrol(); |
252 | printk("MVPControl 0x%lx, STLB %ld VPC %ld EVP %ld\n", val, | |
253 | (val & MVPCONTROL_STLB) >> MVPCONTROL_STLB_SHIFT, | |
254 | (val & MVPCONTROL_VPC) >> MVPCONTROL_VPC_SHIFT, | |
255 | (val & MVPCONTROL_EVP)); | |
256 | ||
2600990e RB |
257 | val = read_c0_mvpconf0(); |
258 | printk("mvpconf0 0x%lx, PVPE %ld PTC %ld M %ld\n", val, | |
259 | (val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT, | |
260 | val & MVPCONF0_PTC, (val & MVPCONF0_M) >> MVPCONF0_M_SHIFT); | |
e01402b1 RB |
261 | } |
262 | ||
263 | /* Find some VPE program space */ | |
571e0bed | 264 | static void *alloc_progmem(unsigned long len) |
e01402b1 | 265 | { |
5408c490 RB |
266 | void *addr; |
267 | ||
e01402b1 | 268 | #ifdef CONFIG_MIPS_VPE_LOADER_TOM |
5408c490 RB |
269 | /* |
270 | * This means you must tell Linux to use less memory than you | |
271 | * physically have, for example by passing a mem= boot argument. | |
272 | */ | |
9f2546ad | 273 | addr = pfn_to_kaddr(max_low_pfn); |
5408c490 | 274 | memset(addr, 0, len); |
e01402b1 | 275 | #else |
5408c490 RB |
276 | /* simple grab some mem for now */ |
277 | addr = kzalloc(len, GFP_KERNEL); | |
e01402b1 | 278 | #endif |
5408c490 RB |
279 | |
280 | return addr; | |
e01402b1 RB |
281 | } |
282 | ||
283 | static void release_progmem(void *ptr) | |
284 | { | |
285 | #ifndef CONFIG_MIPS_VPE_LOADER_TOM | |
286 | kfree(ptr); | |
287 | #endif | |
288 | } | |
289 | ||
290 | /* Update size with this section: return offset. */ | |
291 | static long get_offset(unsigned long *size, Elf_Shdr * sechdr) | |
292 | { | |
293 | long ret; | |
294 | ||
295 | ret = ALIGN(*size, sechdr->sh_addralign ? : 1); | |
296 | *size = ret + sechdr->sh_size; | |
297 | return ret; | |
298 | } | |
299 | ||
300 | /* Lay out the SHF_ALLOC sections in a way not dissimilar to how ld | |
301 | might -- code, read-only data, read-write data, small data. Tally | |
302 | sizes, and place the offsets into sh_entsize fields: high bit means it | |
303 | belongs in init. */ | |
304 | static void layout_sections(struct module *mod, const Elf_Ehdr * hdr, | |
305 | Elf_Shdr * sechdrs, const char *secstrings) | |
306 | { | |
307 | static unsigned long const masks[][2] = { | |
308 | /* NOTE: all executable code must be the first section | |
309 | * in this array; otherwise modify the text_size | |
310 | * finder in the two loops below */ | |
311 | {SHF_EXECINSTR | SHF_ALLOC, ARCH_SHF_SMALL}, | |
312 | {SHF_ALLOC, SHF_WRITE | ARCH_SHF_SMALL}, | |
313 | {SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL}, | |
314 | {ARCH_SHF_SMALL | SHF_ALLOC, 0} | |
315 | }; | |
316 | unsigned int m, i; | |
317 | ||
318 | for (i = 0; i < hdr->e_shnum; i++) | |
319 | sechdrs[i].sh_entsize = ~0UL; | |
320 | ||
321 | for (m = 0; m < ARRAY_SIZE(masks); ++m) { | |
322 | for (i = 0; i < hdr->e_shnum; ++i) { | |
323 | Elf_Shdr *s = &sechdrs[i]; | |
324 | ||
325 | // || strncmp(secstrings + s->sh_name, ".init", 5) == 0) | |
326 | if ((s->sh_flags & masks[m][0]) != masks[m][0] | |
327 | || (s->sh_flags & masks[m][1]) | |
328 | || s->sh_entsize != ~0UL) | |
329 | continue; | |
e2a9cf96 RG |
330 | s->sh_entsize = |
331 | get_offset((unsigned long *)&mod->core_size, s); | |
e01402b1 RB |
332 | } |
333 | ||
334 | if (m == 0) | |
335 | mod->core_text_size = mod->core_size; | |
336 | ||
337 | } | |
338 | } | |
339 | ||
340 | ||
341 | /* from module-elf32.c, but subverted a little */ | |
342 | ||
343 | struct mips_hi16 { | |
344 | struct mips_hi16 *next; | |
345 | Elf32_Addr *addr; | |
346 | Elf32_Addr value; | |
347 | }; | |
348 | ||
349 | static struct mips_hi16 *mips_hi16_list; | |
350 | static unsigned int gp_offs, gp_addr; | |
351 | ||
352 | static int apply_r_mips_none(struct module *me, uint32_t *location, | |
353 | Elf32_Addr v) | |
354 | { | |
355 | return 0; | |
356 | } | |
357 | ||
358 | static int apply_r_mips_gprel16(struct module *me, uint32_t *location, | |
359 | Elf32_Addr v) | |
360 | { | |
361 | int rel; | |
362 | ||
363 | if( !(*location & 0xffff) ) { | |
364 | rel = (int)v - gp_addr; | |
365 | } | |
366 | else { | |
367 | /* .sbss + gp(relative) + offset */ | |
368 | /* kludge! */ | |
369 | rel = (int)(short)((int)v + gp_offs + | |
370 | (int)(short)(*location & 0xffff) - gp_addr); | |
371 | } | |
372 | ||
373 | if( (rel > 32768) || (rel < -32768) ) { | |
2600990e RB |
374 | printk(KERN_DEBUG "VPE loader: apply_r_mips_gprel16: " |
375 | "relative address 0x%x out of range of gp register\n", | |
376 | rel); | |
e01402b1 RB |
377 | return -ENOEXEC; |
378 | } | |
379 | ||
380 | *location = (*location & 0xffff0000) | (rel & 0xffff); | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
385 | static int apply_r_mips_pc16(struct module *me, uint32_t *location, | |
386 | Elf32_Addr v) | |
387 | { | |
388 | int rel; | |
389 | rel = (((unsigned int)v - (unsigned int)location)); | |
390 | rel >>= 2; // because the offset is in _instructions_ not bytes. | |
391 | rel -= 1; // and one instruction less due to the branch delay slot. | |
392 | ||
393 | if( (rel > 32768) || (rel < -32768) ) { | |
2600990e RB |
394 | printk(KERN_DEBUG "VPE loader: " |
395 | "apply_r_mips_pc16: relative address out of range 0x%x\n", rel); | |
e01402b1 RB |
396 | return -ENOEXEC; |
397 | } | |
398 | ||
399 | *location = (*location & 0xffff0000) | (rel & 0xffff); | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | static int apply_r_mips_32(struct module *me, uint32_t *location, | |
405 | Elf32_Addr v) | |
406 | { | |
407 | *location += v; | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | static int apply_r_mips_26(struct module *me, uint32_t *location, | |
413 | Elf32_Addr v) | |
414 | { | |
415 | if (v % 4) { | |
2600990e RB |
416 | printk(KERN_DEBUG "VPE loader: apply_r_mips_26 " |
417 | " unaligned relocation\n"); | |
e01402b1 RB |
418 | return -ENOEXEC; |
419 | } | |
420 | ||
307bd284 RB |
421 | /* |
422 | * Not desperately convinced this is a good check of an overflow condition | |
423 | * anyway. But it gets in the way of handling undefined weak symbols which | |
424 | * we want to set to zero. | |
425 | * if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { | |
426 | * printk(KERN_ERR | |
427 | * "module %s: relocation overflow\n", | |
428 | * me->name); | |
429 | * return -ENOEXEC; | |
430 | * } | |
431 | */ | |
e01402b1 RB |
432 | |
433 | *location = (*location & ~0x03ffffff) | | |
434 | ((*location + (v >> 2)) & 0x03ffffff); | |
435 | return 0; | |
436 | } | |
437 | ||
438 | static int apply_r_mips_hi16(struct module *me, uint32_t *location, | |
439 | Elf32_Addr v) | |
440 | { | |
441 | struct mips_hi16 *n; | |
442 | ||
443 | /* | |
444 | * We cannot relocate this one now because we don't know the value of | |
445 | * the carry we need to add. Save the information, and let LO16 do the | |
446 | * actual relocation. | |
447 | */ | |
448 | n = kmalloc(sizeof *n, GFP_KERNEL); | |
449 | if (!n) | |
450 | return -ENOMEM; | |
451 | ||
452 | n->addr = location; | |
453 | n->value = v; | |
454 | n->next = mips_hi16_list; | |
455 | mips_hi16_list = n; | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | static int apply_r_mips_lo16(struct module *me, uint32_t *location, | |
461 | Elf32_Addr v) | |
462 | { | |
463 | unsigned long insnlo = *location; | |
464 | Elf32_Addr val, vallo; | |
477c4b07 | 465 | struct mips_hi16 *l, *next; |
e01402b1 RB |
466 | |
467 | /* Sign extend the addend we extract from the lo insn. */ | |
468 | vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000; | |
469 | ||
470 | if (mips_hi16_list != NULL) { | |
e01402b1 RB |
471 | |
472 | l = mips_hi16_list; | |
473 | while (l != NULL) { | |
e01402b1 RB |
474 | unsigned long insn; |
475 | ||
476 | /* | |
477 | * The value for the HI16 had best be the same. | |
478 | */ | |
2600990e RB |
479 | if (v != l->value) { |
480 | printk(KERN_DEBUG "VPE loader: " | |
b1e3afa0 | 481 | "apply_r_mips_lo16/hi16: \t" |
2600990e | 482 | "inconsistent value information\n"); |
477c4b07 | 483 | goto out_free; |
e01402b1 RB |
484 | } |
485 | ||
e01402b1 RB |
486 | /* |
487 | * Do the HI16 relocation. Note that we actually don't | |
488 | * need to know anything about the LO16 itself, except | |
489 | * where to find the low 16 bits of the addend needed | |
490 | * by the LO16. | |
491 | */ | |
492 | insn = *l->addr; | |
493 | val = ((insn & 0xffff) << 16) + vallo; | |
494 | val += v; | |
495 | ||
496 | /* | |
497 | * Account for the sign extension that will happen in | |
498 | * the low bits. | |
499 | */ | |
500 | val = ((val >> 16) + ((val & 0x8000) != 0)) & 0xffff; | |
501 | ||
502 | insn = (insn & ~0xffff) | val; | |
503 | *l->addr = insn; | |
504 | ||
505 | next = l->next; | |
506 | kfree(l); | |
507 | l = next; | |
508 | } | |
509 | ||
510 | mips_hi16_list = NULL; | |
511 | } | |
512 | ||
513 | /* | |
514 | * Ok, we're done with the HI16 relocs. Now deal with the LO16. | |
515 | */ | |
516 | val = v + vallo; | |
517 | insnlo = (insnlo & ~0xffff) | (val & 0xffff); | |
518 | *location = insnlo; | |
519 | ||
520 | return 0; | |
477c4b07 RB |
521 | |
522 | out_free: | |
523 | while (l != NULL) { | |
524 | next = l->next; | |
525 | kfree(l); | |
526 | l = next; | |
527 | } | |
528 | mips_hi16_list = NULL; | |
529 | ||
530 | return -ENOEXEC; | |
e01402b1 RB |
531 | } |
532 | ||
533 | static int (*reloc_handlers[]) (struct module *me, uint32_t *location, | |
534 | Elf32_Addr v) = { | |
535 | [R_MIPS_NONE] = apply_r_mips_none, | |
536 | [R_MIPS_32] = apply_r_mips_32, | |
537 | [R_MIPS_26] = apply_r_mips_26, | |
538 | [R_MIPS_HI16] = apply_r_mips_hi16, | |
539 | [R_MIPS_LO16] = apply_r_mips_lo16, | |
540 | [R_MIPS_GPREL16] = apply_r_mips_gprel16, | |
541 | [R_MIPS_PC16] = apply_r_mips_pc16 | |
542 | }; | |
543 | ||
2600990e | 544 | static char *rstrs[] = { |
e0daad44 | 545 | [R_MIPS_NONE] = "MIPS_NONE", |
2600990e RB |
546 | [R_MIPS_32] = "MIPS_32", |
547 | [R_MIPS_26] = "MIPS_26", | |
548 | [R_MIPS_HI16] = "MIPS_HI16", | |
549 | [R_MIPS_LO16] = "MIPS_LO16", | |
550 | [R_MIPS_GPREL16] = "MIPS_GPREL16", | |
551 | [R_MIPS_PC16] = "MIPS_PC16" | |
552 | }; | |
e01402b1 RB |
553 | |
554 | int apply_relocations(Elf32_Shdr *sechdrs, | |
555 | const char *strtab, | |
556 | unsigned int symindex, | |
557 | unsigned int relsec, | |
558 | struct module *me) | |
559 | { | |
560 | Elf32_Rel *rel = (void *) sechdrs[relsec].sh_addr; | |
561 | Elf32_Sym *sym; | |
562 | uint32_t *location; | |
563 | unsigned int i; | |
564 | Elf32_Addr v; | |
565 | int res; | |
566 | ||
567 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { | |
568 | Elf32_Word r_info = rel[i].r_info; | |
569 | ||
570 | /* This is where to make the change */ | |
571 | location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr | |
572 | + rel[i].r_offset; | |
573 | /* This is the symbol it is referring to */ | |
574 | sym = (Elf32_Sym *)sechdrs[symindex].sh_addr | |
575 | + ELF32_R_SYM(r_info); | |
576 | ||
577 | if (!sym->st_value) { | |
578 | printk(KERN_DEBUG "%s: undefined weak symbol %s\n", | |
579 | me->name, strtab + sym->st_name); | |
580 | /* just print the warning, dont barf */ | |
581 | } | |
582 | ||
583 | v = sym->st_value; | |
584 | ||
585 | res = reloc_handlers[ELF32_R_TYPE(r_info)](me, location, v); | |
586 | if( res ) { | |
2600990e RB |
587 | char *r = rstrs[ELF32_R_TYPE(r_info)]; |
588 | printk(KERN_WARNING "VPE loader: .text+0x%x " | |
589 | "relocation type %s for symbol \"%s\" failed\n", | |
590 | rel[i].r_offset, r ? r : "UNKNOWN", | |
591 | strtab + sym->st_name); | |
e01402b1 | 592 | return res; |
2600990e | 593 | } |
e01402b1 RB |
594 | } |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
599 | void save_gp_address(unsigned int secbase, unsigned int rel) | |
600 | { | |
601 | gp_addr = secbase + rel; | |
602 | gp_offs = gp_addr - (secbase & 0xffff0000); | |
603 | } | |
604 | /* end module-elf32.c */ | |
605 | ||
606 | ||
607 | ||
608 | /* Change all symbols so that sh_value encodes the pointer directly. */ | |
2600990e | 609 | static void simplify_symbols(Elf_Shdr * sechdrs, |
e01402b1 RB |
610 | unsigned int symindex, |
611 | const char *strtab, | |
612 | const char *secstrings, | |
613 | unsigned int nsecs, struct module *mod) | |
614 | { | |
615 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
616 | unsigned long secbase, bssbase = 0; | |
617 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
2600990e | 618 | int size; |
e01402b1 RB |
619 | |
620 | /* find the .bss section for COMMON symbols */ | |
621 | for (i = 0; i < nsecs; i++) { | |
2600990e | 622 | if (strncmp(secstrings + sechdrs[i].sh_name, ".bss", 4) == 0) { |
e01402b1 | 623 | bssbase = sechdrs[i].sh_addr; |
2600990e RB |
624 | break; |
625 | } | |
e01402b1 RB |
626 | } |
627 | ||
628 | for (i = 1; i < n; i++) { | |
629 | switch (sym[i].st_shndx) { | |
630 | case SHN_COMMON: | |
2600990e RB |
631 | /* Allocate space for the symbol in the .bss section. |
632 | st_value is currently size. | |
e01402b1 RB |
633 | We want it to have the address of the symbol. */ |
634 | ||
635 | size = sym[i].st_value; | |
636 | sym[i].st_value = bssbase; | |
637 | ||
638 | bssbase += size; | |
639 | break; | |
640 | ||
641 | case SHN_ABS: | |
642 | /* Don't need to do anything */ | |
643 | break; | |
644 | ||
645 | case SHN_UNDEF: | |
646 | /* ret = -ENOENT; */ | |
647 | break; | |
648 | ||
649 | case SHN_MIPS_SCOMMON: | |
b1e3afa0 | 650 | printk(KERN_DEBUG "simplify_symbols: ignoring SHN_MIPS_SCOMMON " |
2600990e RB |
651 | "symbol <%s> st_shndx %d\n", strtab + sym[i].st_name, |
652 | sym[i].st_shndx); | |
e01402b1 RB |
653 | // .sbss section |
654 | break; | |
655 | ||
656 | default: | |
657 | secbase = sechdrs[sym[i].st_shndx].sh_addr; | |
658 | ||
659 | if (strncmp(strtab + sym[i].st_name, "_gp", 3) == 0) { | |
660 | save_gp_address(secbase, sym[i].st_value); | |
661 | } | |
662 | ||
663 | sym[i].st_value += secbase; | |
664 | break; | |
665 | } | |
e01402b1 | 666 | } |
e01402b1 RB |
667 | } |
668 | ||
669 | #ifdef DEBUG_ELFLOADER | |
670 | static void dump_elfsymbols(Elf_Shdr * sechdrs, unsigned int symindex, | |
671 | const char *strtab, struct module *mod) | |
672 | { | |
673 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
674 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
675 | ||
676 | printk(KERN_DEBUG "dump_elfsymbols: n %d\n", n); | |
677 | for (i = 1; i < n; i++) { | |
678 | printk(KERN_DEBUG " i %d name <%s> 0x%x\n", i, | |
679 | strtab + sym[i].st_name, sym[i].st_value); | |
680 | } | |
681 | } | |
682 | #endif | |
683 | ||
e01402b1 | 684 | /* We are prepared so configure and start the VPE... */ |
be6e1437 | 685 | static int vpe_run(struct vpe * v) |
e01402b1 | 686 | { |
07cc0c9e | 687 | unsigned long flags, val, dmt_flag; |
2600990e | 688 | struct vpe_notifications *n; |
07cc0c9e | 689 | unsigned int vpeflags; |
e01402b1 RB |
690 | struct tc *t; |
691 | ||
692 | /* check we are the Master VPE */ | |
07cc0c9e | 693 | local_irq_save(flags); |
e01402b1 RB |
694 | val = read_c0_vpeconf0(); |
695 | if (!(val & VPECONF0_MVP)) { | |
696 | printk(KERN_WARNING | |
2600990e | 697 | "VPE loader: only Master VPE's are allowed to configure MT\n"); |
07cc0c9e RB |
698 | local_irq_restore(flags); |
699 | ||
e01402b1 RB |
700 | return -1; |
701 | } | |
702 | ||
07cc0c9e RB |
703 | dmt_flag = dmt(); |
704 | vpeflags = dvpe(); | |
e01402b1 | 705 | |
2600990e | 706 | if (!list_empty(&v->tc)) { |
e0daad44 | 707 | if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { |
07cc0c9e RB |
708 | evpe(vpeflags); |
709 | emt(dmt_flag); | |
710 | local_irq_restore(flags); | |
711 | ||
712 | printk(KERN_WARNING | |
713 | "VPE loader: TC %d is already in use.\n", | |
714 | t->index); | |
e0daad44 RB |
715 | return -ENOEXEC; |
716 | } | |
717 | } else { | |
07cc0c9e RB |
718 | evpe(vpeflags); |
719 | emt(dmt_flag); | |
720 | local_irq_restore(flags); | |
721 | ||
722 | printk(KERN_WARNING | |
723 | "VPE loader: No TC's associated with VPE %d\n", | |
e0daad44 | 724 | v->minor); |
07cc0c9e | 725 | |
e0daad44 RB |
726 | return -ENOEXEC; |
727 | } | |
2600990e | 728 | |
e01402b1 | 729 | /* Put MVPE's into 'configuration state' */ |
340ee4b9 | 730 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 731 | |
e01402b1 RB |
732 | settc(t->index); |
733 | ||
e01402b1 RB |
734 | /* should check it is halted, and not activated */ |
735 | if ((read_tc_c0_tcstatus() & TCSTATUS_A) || !(read_tc_c0_tchalt() & TCHALT_H)) { | |
07cc0c9e RB |
736 | evpe(vpeflags); |
737 | emt(dmt_flag); | |
738 | local_irq_restore(flags); | |
739 | ||
740 | printk(KERN_WARNING "VPE loader: TC %d is already active!\n", | |
e01402b1 | 741 | t->index); |
07cc0c9e | 742 | |
e01402b1 RB |
743 | return -ENOEXEC; |
744 | } | |
745 | ||
746 | /* Write the address we want it to start running from in the TCPC register. */ | |
747 | write_tc_c0_tcrestart((unsigned long)v->__start); | |
e01402b1 | 748 | write_tc_c0_tccontext((unsigned long)0); |
07cc0c9e | 749 | |
2600990e RB |
750 | /* |
751 | * Mark the TC as activated, not interrupt exempt and not dynamically | |
752 | * allocatable | |
753 | */ | |
e01402b1 RB |
754 | val = read_tc_c0_tcstatus(); |
755 | val = (val & ~(TCSTATUS_DA | TCSTATUS_IXMT)) | TCSTATUS_A; | |
756 | write_tc_c0_tcstatus(val); | |
757 | ||
758 | write_tc_c0_tchalt(read_tc_c0_tchalt() & ~TCHALT_H); | |
759 | ||
e01402b1 RB |
760 | /* |
761 | * The sde-kit passes 'memsize' to __start in $a3, so set something | |
2600990e | 762 | * here... Or set $a3 to zero and define DFLT_STACK_SIZE and |
e01402b1 RB |
763 | * DFLT_HEAP_SIZE when you compile your program |
764 | */ | |
41790e04 | 765 | mttgpr(6, v->ntcs); |
07cc0c9e | 766 | mttgpr(7, physical_memsize); |
2600990e RB |
767 | |
768 | /* set up VPE1 */ | |
769 | /* | |
770 | * bind the TC to VPE 1 as late as possible so we only have the final | |
771 | * VPE registers to set up, and so an EJTAG probe can trigger on it | |
772 | */ | |
07cc0c9e | 773 | write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | 1); |
e01402b1 | 774 | |
a94d7020 EO |
775 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~(VPECONF0_VPA)); |
776 | ||
777 | back_to_back_c0_hazard(); | |
778 | ||
e0daad44 RB |
779 | /* Set up the XTC bit in vpeconf0 to point at our tc */ |
780 | write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC)) | |
781 | | (t->index << VPECONF0_XTC_SHIFT)); | |
e01402b1 | 782 | |
a94d7020 EO |
783 | back_to_back_c0_hazard(); |
784 | ||
e0daad44 RB |
785 | /* enable this VPE */ |
786 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); | |
e01402b1 RB |
787 | |
788 | /* clear out any left overs from a previous program */ | |
2600990e | 789 | write_vpe_c0_status(0); |
e01402b1 RB |
790 | write_vpe_c0_cause(0); |
791 | ||
792 | /* take system out of configuration state */ | |
340ee4b9 | 793 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 794 | |
b618336a KK |
795 | /* |
796 | * SMTC/SMVP kernels manage VPE enable independently, | |
797 | * but uniprocessor kernels need to turn it on, even | |
798 | * if that wasn't the pre-dvpe() state. | |
799 | */ | |
07cc0c9e | 800 | #ifdef CONFIG_SMP |
07cc0c9e | 801 | evpe(vpeflags); |
b618336a KK |
802 | #else |
803 | evpe(EVPE_ENABLE); | |
07cc0c9e RB |
804 | #endif |
805 | emt(dmt_flag); | |
806 | local_irq_restore(flags); | |
e01402b1 | 807 | |
07cc0c9e RB |
808 | list_for_each_entry(n, &v->notify, list) |
809 | n->start(minor); | |
2600990e | 810 | |
e01402b1 RB |
811 | return 0; |
812 | } | |
813 | ||
2600990e | 814 | static int find_vpe_symbols(struct vpe * v, Elf_Shdr * sechdrs, |
e01402b1 RB |
815 | unsigned int symindex, const char *strtab, |
816 | struct module *mod) | |
817 | { | |
818 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
819 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
820 | ||
821 | for (i = 1; i < n; i++) { | |
822 | if (strcmp(strtab + sym[i].st_name, "__start") == 0) { | |
823 | v->__start = sym[i].st_value; | |
824 | } | |
825 | ||
826 | if (strcmp(strtab + sym[i].st_name, "vpe_shared") == 0) { | |
827 | v->shared_ptr = (void *)sym[i].st_value; | |
828 | } | |
829 | } | |
830 | ||
2600990e RB |
831 | if ( (v->__start == 0) || (v->shared_ptr == NULL)) |
832 | return -1; | |
833 | ||
e01402b1 RB |
834 | return 0; |
835 | } | |
836 | ||
307bd284 | 837 | /* |
2600990e RB |
838 | * Allocates a VPE with some program code space(the load address), copies the |
839 | * contents of the program (p)buffer performing relocatations/etc, free's it | |
840 | * when finished. | |
841 | */ | |
be6e1437 | 842 | static int vpe_elfload(struct vpe * v) |
e01402b1 RB |
843 | { |
844 | Elf_Ehdr *hdr; | |
845 | Elf_Shdr *sechdrs; | |
846 | long err = 0; | |
847 | char *secstrings, *strtab = NULL; | |
2600990e | 848 | unsigned int len, i, symindex = 0, strindex = 0, relocate = 0; |
e01402b1 RB |
849 | struct module mod; // so we can re-use the relocations code |
850 | ||
851 | memset(&mod, 0, sizeof(struct module)); | |
2600990e | 852 | strcpy(mod.name, "VPE loader"); |
e01402b1 RB |
853 | |
854 | hdr = (Elf_Ehdr *) v->pbuffer; | |
855 | len = v->plen; | |
856 | ||
857 | /* Sanity checks against insmoding binaries or wrong arch, | |
858 | weird elf version */ | |
d303f4a1 | 859 | if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0 |
2600990e RB |
860 | || (hdr->e_type != ET_REL && hdr->e_type != ET_EXEC) |
861 | || !elf_check_arch(hdr) | |
e01402b1 RB |
862 | || hdr->e_shentsize != sizeof(*sechdrs)) { |
863 | printk(KERN_WARNING | |
2600990e | 864 | "VPE loader: program wrong arch or weird elf version\n"); |
e01402b1 RB |
865 | |
866 | return -ENOEXEC; | |
867 | } | |
868 | ||
2600990e RB |
869 | if (hdr->e_type == ET_REL) |
870 | relocate = 1; | |
871 | ||
e01402b1 | 872 | if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) { |
2600990e RB |
873 | printk(KERN_ERR "VPE loader: program length %u truncated\n", |
874 | len); | |
875 | ||
e01402b1 RB |
876 | return -ENOEXEC; |
877 | } | |
878 | ||
879 | /* Convenience variables */ | |
880 | sechdrs = (void *)hdr + hdr->e_shoff; | |
881 | secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; | |
882 | sechdrs[0].sh_addr = 0; | |
883 | ||
884 | /* And these should exist, but gcc whinges if we don't init them */ | |
885 | symindex = strindex = 0; | |
886 | ||
2600990e RB |
887 | if (relocate) { |
888 | for (i = 1; i < hdr->e_shnum; i++) { | |
889 | if (sechdrs[i].sh_type != SHT_NOBITS | |
890 | && len < sechdrs[i].sh_offset + sechdrs[i].sh_size) { | |
891 | printk(KERN_ERR "VPE program length %u truncated\n", | |
892 | len); | |
893 | return -ENOEXEC; | |
894 | } | |
e01402b1 | 895 | |
2600990e RB |
896 | /* Mark all sections sh_addr with their address in the |
897 | temporary image. */ | |
898 | sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; | |
e01402b1 | 899 | |
2600990e RB |
900 | /* Internal symbols and strings. */ |
901 | if (sechdrs[i].sh_type == SHT_SYMTAB) { | |
902 | symindex = i; | |
903 | strindex = sechdrs[i].sh_link; | |
904 | strtab = (char *)hdr + sechdrs[strindex].sh_offset; | |
905 | } | |
e01402b1 | 906 | } |
2600990e | 907 | layout_sections(&mod, hdr, sechdrs, secstrings); |
e01402b1 RB |
908 | } |
909 | ||
e01402b1 | 910 | v->load_addr = alloc_progmem(mod.core_size); |
5408c490 RB |
911 | if (!v->load_addr) |
912 | return -ENOMEM; | |
e01402b1 | 913 | |
5408c490 | 914 | pr_info("VPE loader: loading to %p\n", v->load_addr); |
e01402b1 | 915 | |
2600990e RB |
916 | if (relocate) { |
917 | for (i = 0; i < hdr->e_shnum; i++) { | |
918 | void *dest; | |
e01402b1 | 919 | |
2600990e RB |
920 | if (!(sechdrs[i].sh_flags & SHF_ALLOC)) |
921 | continue; | |
e01402b1 | 922 | |
2600990e | 923 | dest = v->load_addr + sechdrs[i].sh_entsize; |
e01402b1 | 924 | |
2600990e RB |
925 | if (sechdrs[i].sh_type != SHT_NOBITS) |
926 | memcpy(dest, (void *)sechdrs[i].sh_addr, | |
927 | sechdrs[i].sh_size); | |
928 | /* Update sh_addr to point to copy in image. */ | |
929 | sechdrs[i].sh_addr = (unsigned long)dest; | |
e01402b1 | 930 | |
2600990e RB |
931 | printk(KERN_DEBUG " section sh_name %s sh_addr 0x%x\n", |
932 | secstrings + sechdrs[i].sh_name, sechdrs[i].sh_addr); | |
933 | } | |
e01402b1 | 934 | |
2600990e RB |
935 | /* Fix up syms, so that st_value is a pointer to location. */ |
936 | simplify_symbols(sechdrs, symindex, strtab, secstrings, | |
937 | hdr->e_shnum, &mod); | |
938 | ||
939 | /* Now do relocations. */ | |
940 | for (i = 1; i < hdr->e_shnum; i++) { | |
941 | const char *strtab = (char *)sechdrs[strindex].sh_addr; | |
942 | unsigned int info = sechdrs[i].sh_info; | |
943 | ||
944 | /* Not a valid relocation section? */ | |
945 | if (info >= hdr->e_shnum) | |
946 | continue; | |
947 | ||
948 | /* Don't bother with non-allocated sections */ | |
949 | if (!(sechdrs[info].sh_flags & SHF_ALLOC)) | |
950 | continue; | |
951 | ||
952 | if (sechdrs[i].sh_type == SHT_REL) | |
953 | err = apply_relocations(sechdrs, strtab, symindex, i, | |
954 | &mod); | |
955 | else if (sechdrs[i].sh_type == SHT_RELA) | |
956 | err = apply_relocate_add(sechdrs, strtab, symindex, i, | |
957 | &mod); | |
958 | if (err < 0) | |
959 | return err; | |
960 | ||
961 | } | |
962 | } else { | |
bdf5d42c | 963 | struct elf_phdr *phdr = (struct elf_phdr *) ((char *)hdr + hdr->e_phoff); |
2600990e | 964 | |
bdf5d42c | 965 | for (i = 0; i < hdr->e_phnum; i++) { |
b618336a KK |
966 | if (phdr->p_type == PT_LOAD) { |
967 | memcpy((void *)phdr->p_paddr, | |
968 | (char *)hdr + phdr->p_offset, | |
969 | phdr->p_filesz); | |
970 | memset((void *)phdr->p_paddr + phdr->p_filesz, | |
971 | 0, phdr->p_memsz - phdr->p_filesz); | |
972 | } | |
973 | phdr++; | |
bdf5d42c RB |
974 | } |
975 | ||
976 | for (i = 0; i < hdr->e_shnum; i++) { | |
2600990e RB |
977 | /* Internal symbols and strings. */ |
978 | if (sechdrs[i].sh_type == SHT_SYMTAB) { | |
979 | symindex = i; | |
980 | strindex = sechdrs[i].sh_link; | |
981 | strtab = (char *)hdr + sechdrs[strindex].sh_offset; | |
982 | ||
983 | /* mark the symtab's address for when we try to find the | |
984 | magic symbols */ | |
985 | sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; | |
986 | } | |
e01402b1 RB |
987 | } |
988 | } | |
989 | ||
990 | /* make sure it's physically written out */ | |
991 | flush_icache_range((unsigned long)v->load_addr, | |
992 | (unsigned long)v->load_addr + v->len); | |
993 | ||
994 | if ((find_vpe_symbols(v, sechdrs, symindex, strtab, &mod)) < 0) { | |
2600990e RB |
995 | if (v->__start == 0) { |
996 | printk(KERN_WARNING "VPE loader: program does not contain " | |
997 | "a __start symbol\n"); | |
998 | return -ENOEXEC; | |
999 | } | |
e01402b1 | 1000 | |
2600990e RB |
1001 | if (v->shared_ptr == NULL) |
1002 | printk(KERN_WARNING "VPE loader: " | |
1003 | "program does not contain vpe_shared symbol.\n" | |
1004 | " Unable to use AMVP (AP/SP) facilities.\n"); | |
e01402b1 RB |
1005 | } |
1006 | ||
1007 | printk(" elf loaded\n"); | |
2600990e | 1008 | return 0; |
e01402b1 RB |
1009 | } |
1010 | ||
2600990e RB |
1011 | static void cleanup_tc(struct tc *tc) |
1012 | { | |
07cc0c9e RB |
1013 | unsigned long flags; |
1014 | unsigned int mtflags, vpflags; | |
2600990e RB |
1015 | int tmp; |
1016 | ||
07cc0c9e RB |
1017 | local_irq_save(flags); |
1018 | mtflags = dmt(); | |
1019 | vpflags = dvpe(); | |
2600990e RB |
1020 | /* Put MVPE's into 'configuration state' */ |
1021 | set_c0_mvpcontrol(MVPCONTROL_VPC); | |
1022 | ||
1023 | settc(tc->index); | |
1024 | tmp = read_tc_c0_tcstatus(); | |
1025 | ||
1026 | /* mark not allocated and not dynamically allocatable */ | |
1027 | tmp &= ~(TCSTATUS_A | TCSTATUS_DA); | |
1028 | tmp |= TCSTATUS_IXMT; /* interrupt exempt */ | |
1029 | write_tc_c0_tcstatus(tmp); | |
1030 | ||
1031 | write_tc_c0_tchalt(TCHALT_H); | |
7c3a622d | 1032 | mips_ihb(); |
2600990e RB |
1033 | |
1034 | /* bind it to anything other than VPE1 */ | |
07cc0c9e | 1035 | // write_tc_c0_tcbind(read_tc_c0_tcbind() & ~TCBIND_CURVPE); // | TCBIND_CURVPE |
2600990e RB |
1036 | |
1037 | clear_c0_mvpcontrol(MVPCONTROL_VPC); | |
07cc0c9e RB |
1038 | evpe(vpflags); |
1039 | emt(mtflags); | |
1040 | local_irq_restore(flags); | |
2600990e RB |
1041 | } |
1042 | ||
1043 | static int getcwd(char *buff, int size) | |
1044 | { | |
1045 | mm_segment_t old_fs; | |
1046 | int ret; | |
1047 | ||
1048 | old_fs = get_fs(); | |
1049 | set_fs(KERNEL_DS); | |
1050 | ||
21a151d8 | 1051 | ret = sys_getcwd(buff, size); |
2600990e RB |
1052 | |
1053 | set_fs(old_fs); | |
1054 | ||
1055 | return ret; | |
1056 | } | |
1057 | ||
1058 | /* checks VPE is unused and gets ready to load program */ | |
e01402b1 RB |
1059 | static int vpe_open(struct inode *inode, struct file *filp) |
1060 | { | |
c4c4018b | 1061 | enum vpe_state state; |
2600990e | 1062 | struct vpe_notifications *not; |
07cc0c9e | 1063 | struct vpe *v; |
7558da94 | 1064 | int ret, err = 0; |
e01402b1 | 1065 | |
7558da94 | 1066 | lock_kernel(); |
07cc0c9e RB |
1067 | if (minor != iminor(inode)) { |
1068 | /* assume only 1 device at the moment. */ | |
2600990e | 1069 | printk(KERN_WARNING "VPE loader: only vpe1 is supported\n"); |
7558da94 JC |
1070 | err = -ENODEV; |
1071 | goto out; | |
e01402b1 RB |
1072 | } |
1073 | ||
07cc0c9e | 1074 | if ((v = get_vpe(tclimit)) == NULL) { |
2600990e | 1075 | printk(KERN_WARNING "VPE loader: unable to get vpe\n"); |
7558da94 JC |
1076 | err = -ENODEV; |
1077 | goto out; | |
e01402b1 RB |
1078 | } |
1079 | ||
c4c4018b RB |
1080 | state = xchg(&v->state, VPE_STATE_INUSE); |
1081 | if (state != VPE_STATE_UNUSED) { | |
2600990e | 1082 | printk(KERN_DEBUG "VPE loader: tc in use dumping regs\n"); |
e01402b1 | 1083 | |
2600990e | 1084 | list_for_each_entry(not, &v->notify, list) { |
07cc0c9e | 1085 | not->stop(tclimit); |
2600990e | 1086 | } |
e01402b1 | 1087 | |
2600990e | 1088 | release_progmem(v->load_addr); |
07cc0c9e | 1089 | cleanup_tc(get_tc(tclimit)); |
e01402b1 RB |
1090 | } |
1091 | ||
e01402b1 RB |
1092 | /* this of-course trashes what was there before... */ |
1093 | v->pbuffer = vmalloc(P_SIZE); | |
1094 | v->plen = P_SIZE; | |
1095 | v->load_addr = NULL; | |
1096 | v->len = 0; | |
1097 | ||
d76b0d9b DH |
1098 | v->uid = filp->f_cred->fsuid; |
1099 | v->gid = filp->f_cred->fsgid; | |
2600990e RB |
1100 | |
1101 | #ifdef CONFIG_MIPS_APSP_KSPD | |
1102 | /* get kspd to tell us when a syscall_exit happens */ | |
1103 | if (!kspd_events_reqd) { | |
1104 | kspd_notify(&kspd_events); | |
1105 | kspd_events_reqd++; | |
1106 | } | |
1107 | #endif | |
1108 | ||
1109 | v->cwd[0] = 0; | |
1110 | ret = getcwd(v->cwd, VPE_PATH_MAX); | |
1111 | if (ret < 0) | |
1112 | printk(KERN_WARNING "VPE loader: open, getcwd returned %d\n", ret); | |
1113 | ||
1114 | v->shared_ptr = NULL; | |
1115 | v->__start = 0; | |
07cc0c9e | 1116 | |
7558da94 JC |
1117 | out: |
1118 | unlock_kernel(); | |
e01402b1 RB |
1119 | return 0; |
1120 | } | |
1121 | ||
1122 | static int vpe_release(struct inode *inode, struct file *filp) | |
1123 | { | |
307bd284 | 1124 | struct vpe *v; |
e01402b1 | 1125 | Elf_Ehdr *hdr; |
07cc0c9e | 1126 | int ret = 0; |
e01402b1 | 1127 | |
07cc0c9e RB |
1128 | v = get_vpe(tclimit); |
1129 | if (v == NULL) | |
e01402b1 RB |
1130 | return -ENODEV; |
1131 | ||
e01402b1 | 1132 | hdr = (Elf_Ehdr *) v->pbuffer; |
d303f4a1 | 1133 | if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) == 0) { |
07cc0c9e | 1134 | if (vpe_elfload(v) >= 0) { |
e01402b1 | 1135 | vpe_run(v); |
07cc0c9e | 1136 | } else { |
2600990e | 1137 | printk(KERN_WARNING "VPE loader: ELF load failed.\n"); |
e01402b1 RB |
1138 | ret = -ENOEXEC; |
1139 | } | |
1140 | } else { | |
2600990e | 1141 | printk(KERN_WARNING "VPE loader: only elf files are supported\n"); |
e01402b1 RB |
1142 | ret = -ENOEXEC; |
1143 | } | |
1144 | ||
2600990e RB |
1145 | /* It's good to be able to run the SP and if it chokes have a look at |
1146 | the /dev/rt?. But if we reset the pointer to the shared struct we | |
8ebcfc8b | 1147 | lose what has happened. So perhaps if garbage is sent to the vpe |
2600990e RB |
1148 | device, use it as a trigger for the reset. Hopefully a nice |
1149 | executable will be along shortly. */ | |
1150 | if (ret < 0) | |
1151 | v->shared_ptr = NULL; | |
1152 | ||
e01402b1 RB |
1153 | // cleanup any temp buffers |
1154 | if (v->pbuffer) | |
1155 | vfree(v->pbuffer); | |
1156 | v->plen = 0; | |
1157 | return ret; | |
1158 | } | |
1159 | ||
1160 | static ssize_t vpe_write(struct file *file, const char __user * buffer, | |
1161 | size_t count, loff_t * ppos) | |
1162 | { | |
e01402b1 | 1163 | size_t ret = count; |
307bd284 | 1164 | struct vpe *v; |
e01402b1 | 1165 | |
07cc0c9e RB |
1166 | if (iminor(file->f_path.dentry->d_inode) != minor) |
1167 | return -ENODEV; | |
1168 | ||
1169 | v = get_vpe(tclimit); | |
1170 | if (v == NULL) | |
e01402b1 RB |
1171 | return -ENODEV; |
1172 | ||
1173 | if (v->pbuffer == NULL) { | |
2600990e | 1174 | printk(KERN_ERR "VPE loader: no buffer for program\n"); |
e01402b1 RB |
1175 | return -ENOMEM; |
1176 | } | |
1177 | ||
1178 | if ((count + v->len) > v->plen) { | |
1179 | printk(KERN_WARNING | |
2600990e | 1180 | "VPE loader: elf size too big. Perhaps strip uneeded symbols\n"); |
e01402b1 RB |
1181 | return -ENOMEM; |
1182 | } | |
1183 | ||
1184 | count -= copy_from_user(v->pbuffer + v->len, buffer, count); | |
2600990e | 1185 | if (!count) |
e01402b1 | 1186 | return -EFAULT; |
e01402b1 RB |
1187 | |
1188 | v->len += count; | |
1189 | return ret; | |
1190 | } | |
1191 | ||
5dfe4c96 | 1192 | static const struct file_operations vpe_fops = { |
e01402b1 RB |
1193 | .owner = THIS_MODULE, |
1194 | .open = vpe_open, | |
1195 | .release = vpe_release, | |
1196 | .write = vpe_write | |
1197 | }; | |
1198 | ||
1199 | /* module wrapper entry points */ | |
1200 | /* give me a vpe */ | |
1201 | vpe_handle vpe_alloc(void) | |
1202 | { | |
1203 | int i; | |
1204 | struct vpe *v; | |
1205 | ||
1206 | /* find a vpe */ | |
1207 | for (i = 1; i < MAX_VPES; i++) { | |
1208 | if ((v = get_vpe(i)) != NULL) { | |
1209 | v->state = VPE_STATE_INUSE; | |
1210 | return v; | |
1211 | } | |
1212 | } | |
1213 | return NULL; | |
1214 | } | |
1215 | ||
1216 | EXPORT_SYMBOL(vpe_alloc); | |
1217 | ||
1218 | /* start running from here */ | |
1219 | int vpe_start(vpe_handle vpe, unsigned long start) | |
1220 | { | |
1221 | struct vpe *v = vpe; | |
1222 | ||
1223 | v->__start = start; | |
1224 | return vpe_run(v); | |
1225 | } | |
1226 | ||
1227 | EXPORT_SYMBOL(vpe_start); | |
1228 | ||
1229 | /* halt it for now */ | |
1230 | int vpe_stop(vpe_handle vpe) | |
1231 | { | |
1232 | struct vpe *v = vpe; | |
1233 | struct tc *t; | |
1234 | unsigned int evpe_flags; | |
1235 | ||
1236 | evpe_flags = dvpe(); | |
1237 | ||
1238 | if ((t = list_entry(v->tc.next, struct tc, tc)) != NULL) { | |
1239 | ||
1240 | settc(t->index); | |
1241 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); | |
1242 | } | |
1243 | ||
1244 | evpe(evpe_flags); | |
1245 | ||
1246 | return 0; | |
1247 | } | |
1248 | ||
1249 | EXPORT_SYMBOL(vpe_stop); | |
1250 | ||
1251 | /* I've done with it thank you */ | |
1252 | int vpe_free(vpe_handle vpe) | |
1253 | { | |
1254 | struct vpe *v = vpe; | |
1255 | struct tc *t; | |
1256 | unsigned int evpe_flags; | |
1257 | ||
1258 | if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { | |
1259 | return -ENOEXEC; | |
1260 | } | |
1261 | ||
1262 | evpe_flags = dvpe(); | |
1263 | ||
1264 | /* Put MVPE's into 'configuration state' */ | |
340ee4b9 | 1265 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1266 | |
1267 | settc(t->index); | |
1268 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); | |
1269 | ||
7c3a622d | 1270 | /* halt the TC */ |
e01402b1 | 1271 | write_tc_c0_tchalt(TCHALT_H); |
7c3a622d NS |
1272 | mips_ihb(); |
1273 | ||
1274 | /* mark the TC unallocated */ | |
1275 | write_tc_c0_tcstatus(read_tc_c0_tcstatus() & ~TCSTATUS_A); | |
e01402b1 RB |
1276 | |
1277 | v->state = VPE_STATE_UNUSED; | |
1278 | ||
340ee4b9 | 1279 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1280 | evpe(evpe_flags); |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | EXPORT_SYMBOL(vpe_free); | |
1286 | ||
1287 | void *vpe_get_shared(int index) | |
1288 | { | |
1289 | struct vpe *v; | |
1290 | ||
2600990e | 1291 | if ((v = get_vpe(index)) == NULL) |
e01402b1 | 1292 | return NULL; |
e01402b1 RB |
1293 | |
1294 | return v->shared_ptr; | |
1295 | } | |
1296 | ||
1297 | EXPORT_SYMBOL(vpe_get_shared); | |
1298 | ||
2600990e RB |
1299 | int vpe_getuid(int index) |
1300 | { | |
1301 | struct vpe *v; | |
1302 | ||
1303 | if ((v = get_vpe(index)) == NULL) | |
1304 | return -1; | |
1305 | ||
1306 | return v->uid; | |
1307 | } | |
1308 | ||
1309 | EXPORT_SYMBOL(vpe_getuid); | |
1310 | ||
1311 | int vpe_getgid(int index) | |
1312 | { | |
1313 | struct vpe *v; | |
1314 | ||
1315 | if ((v = get_vpe(index)) == NULL) | |
1316 | return -1; | |
1317 | ||
1318 | return v->gid; | |
1319 | } | |
1320 | ||
1321 | EXPORT_SYMBOL(vpe_getgid); | |
1322 | ||
1323 | int vpe_notify(int index, struct vpe_notifications *notify) | |
1324 | { | |
1325 | struct vpe *v; | |
1326 | ||
1327 | if ((v = get_vpe(index)) == NULL) | |
1328 | return -1; | |
1329 | ||
1330 | list_add(¬ify->list, &v->notify); | |
1331 | return 0; | |
1332 | } | |
1333 | ||
1334 | EXPORT_SYMBOL(vpe_notify); | |
1335 | ||
1336 | char *vpe_getcwd(int index) | |
1337 | { | |
1338 | struct vpe *v; | |
1339 | ||
1340 | if ((v = get_vpe(index)) == NULL) | |
1341 | return NULL; | |
1342 | ||
1343 | return v->cwd; | |
1344 | } | |
1345 | ||
1346 | EXPORT_SYMBOL(vpe_getcwd); | |
1347 | ||
1348 | #ifdef CONFIG_MIPS_APSP_KSPD | |
1349 | static void kspd_sp_exit( int sp_id) | |
1350 | { | |
1351 | cleanup_tc(get_tc(sp_id)); | |
1352 | } | |
1353 | #endif | |
1354 | ||
736fad17 KS |
1355 | static ssize_t store_kill(struct device *dev, struct device_attribute *attr, |
1356 | const char *buf, size_t len) | |
0f5d0df3 RB |
1357 | { |
1358 | struct vpe *vpe = get_vpe(tclimit); | |
1359 | struct vpe_notifications *not; | |
1360 | ||
1361 | list_for_each_entry(not, &vpe->notify, list) { | |
1362 | not->stop(tclimit); | |
1363 | } | |
1364 | ||
1365 | release_progmem(vpe->load_addr); | |
1366 | cleanup_tc(get_tc(tclimit)); | |
1367 | vpe_stop(vpe); | |
1368 | vpe_free(vpe); | |
1369 | ||
1370 | return len; | |
1371 | } | |
1372 | ||
736fad17 KS |
1373 | static ssize_t show_ntcs(struct device *cd, struct device_attribute *attr, |
1374 | char *buf) | |
41790e04 RB |
1375 | { |
1376 | struct vpe *vpe = get_vpe(tclimit); | |
1377 | ||
1378 | return sprintf(buf, "%d\n", vpe->ntcs); | |
1379 | } | |
1380 | ||
736fad17 KS |
1381 | static ssize_t store_ntcs(struct device *dev, struct device_attribute *attr, |
1382 | const char *buf, size_t len) | |
41790e04 RB |
1383 | { |
1384 | struct vpe *vpe = get_vpe(tclimit); | |
1385 | unsigned long new; | |
1386 | char *endp; | |
1387 | ||
1388 | new = simple_strtoul(buf, &endp, 0); | |
1389 | if (endp == buf) | |
1390 | goto out_einval; | |
1391 | ||
1392 | if (new == 0 || new > (hw_tcs - tclimit)) | |
1393 | goto out_einval; | |
1394 | ||
1395 | vpe->ntcs = new; | |
1396 | ||
1397 | return len; | |
1398 | ||
1399 | out_einval: | |
52a7a27c | 1400 | return -EINVAL; |
41790e04 RB |
1401 | } |
1402 | ||
736fad17 | 1403 | static struct device_attribute vpe_class_attributes[] = { |
0f5d0df3 | 1404 | __ATTR(kill, S_IWUSR, NULL, store_kill), |
41790e04 RB |
1405 | __ATTR(ntcs, S_IRUGO | S_IWUSR, show_ntcs, store_ntcs), |
1406 | {} | |
1407 | }; | |
1408 | ||
736fad17 | 1409 | static void vpe_device_release(struct device *cd) |
41790e04 RB |
1410 | { |
1411 | kfree(cd); | |
1412 | } | |
1413 | ||
1414 | struct class vpe_class = { | |
1415 | .name = "vpe", | |
1416 | .owner = THIS_MODULE, | |
736fad17 KS |
1417 | .dev_release = vpe_device_release, |
1418 | .dev_attrs = vpe_class_attributes, | |
41790e04 RB |
1419 | }; |
1420 | ||
736fad17 | 1421 | struct device vpe_device; |
27a3bbaf | 1422 | |
e01402b1 RB |
1423 | static int __init vpe_module_init(void) |
1424 | { | |
07cc0c9e | 1425 | unsigned int mtflags, vpflags; |
07cc0c9e | 1426 | unsigned long flags, val; |
e01402b1 RB |
1427 | struct vpe *v = NULL; |
1428 | struct tc *t; | |
41790e04 | 1429 | int tc, err; |
e01402b1 RB |
1430 | |
1431 | if (!cpu_has_mipsmt) { | |
1432 | printk("VPE loader: not a MIPS MT capable processor\n"); | |
1433 | return -ENODEV; | |
1434 | } | |
1435 | ||
07cc0c9e RB |
1436 | if (vpelimit == 0) { |
1437 | printk(KERN_WARNING "No VPEs reserved for AP/SP, not " | |
1438 | "initializing VPE loader.\nPass maxvpes=<n> argument as " | |
1439 | "kernel argument\n"); | |
1440 | ||
1441 | return -ENODEV; | |
1442 | } | |
1443 | ||
1444 | if (tclimit == 0) { | |
1445 | printk(KERN_WARNING "No TCs reserved for AP/SP, not " | |
1446 | "initializing VPE loader.\nPass maxtcs=<n> argument as " | |
1447 | "kernel argument\n"); | |
1448 | ||
1449 | return -ENODEV; | |
1450 | } | |
1451 | ||
682e852e AD |
1452 | major = register_chrdev(0, module_name, &vpe_fops); |
1453 | if (major < 0) { | |
e01402b1 | 1454 | printk("VPE loader: unable to register character device\n"); |
307bd284 | 1455 | return major; |
e01402b1 RB |
1456 | } |
1457 | ||
41790e04 RB |
1458 | err = class_register(&vpe_class); |
1459 | if (err) { | |
1460 | printk(KERN_ERR "vpe_class registration failed\n"); | |
27a3bbaf RB |
1461 | goto out_chrdev; |
1462 | } | |
41790e04 | 1463 | |
736fad17 | 1464 | device_initialize(&vpe_device); |
41790e04 RB |
1465 | vpe_device.class = &vpe_class, |
1466 | vpe_device.parent = NULL, | |
1bb5beb4 | 1467 | dev_set_name(&vpe_device, "vpe1"); |
41790e04 | 1468 | vpe_device.devt = MKDEV(major, minor); |
736fad17 | 1469 | err = device_add(&vpe_device); |
41790e04 RB |
1470 | if (err) { |
1471 | printk(KERN_ERR "Adding vpe_device failed\n"); | |
1472 | goto out_class; | |
1473 | } | |
27a3bbaf | 1474 | |
07cc0c9e RB |
1475 | local_irq_save(flags); |
1476 | mtflags = dmt(); | |
1477 | vpflags = dvpe(); | |
e01402b1 RB |
1478 | |
1479 | /* Put MVPE's into 'configuration state' */ | |
340ee4b9 | 1480 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1481 | |
1482 | /* dump_mtregs(); */ | |
1483 | ||
e01402b1 | 1484 | val = read_c0_mvpconf0(); |
07cc0c9e RB |
1485 | hw_tcs = (val & MVPCONF0_PTC) + 1; |
1486 | hw_vpes = ((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1; | |
1487 | ||
1488 | for (tc = tclimit; tc < hw_tcs; tc++) { | |
1489 | /* | |
1490 | * Must re-enable multithreading temporarily or in case we | |
1491 | * reschedule send IPIs or similar we might hang. | |
1492 | */ | |
1493 | clear_c0_mvpcontrol(MVPCONTROL_VPC); | |
1494 | evpe(vpflags); | |
1495 | emt(mtflags); | |
1496 | local_irq_restore(flags); | |
1497 | t = alloc_tc(tc); | |
1498 | if (!t) { | |
1499 | err = -ENOMEM; | |
1500 | goto out; | |
1501 | } | |
1502 | ||
1503 | local_irq_save(flags); | |
1504 | mtflags = dmt(); | |
1505 | vpflags = dvpe(); | |
1506 | set_c0_mvpcontrol(MVPCONTROL_VPC); | |
e01402b1 RB |
1507 | |
1508 | /* VPE's */ | |
07cc0c9e RB |
1509 | if (tc < hw_tcs) { |
1510 | settc(tc); | |
e01402b1 | 1511 | |
07cc0c9e | 1512 | if ((v = alloc_vpe(tc)) == NULL) { |
e01402b1 | 1513 | printk(KERN_WARNING "VPE: unable to allocate VPE\n"); |
07cc0c9e RB |
1514 | |
1515 | goto out_reenable; | |
e01402b1 RB |
1516 | } |
1517 | ||
41790e04 RB |
1518 | v->ntcs = hw_tcs - tclimit; |
1519 | ||
2600990e RB |
1520 | /* add the tc to the list of this vpe's tc's. */ |
1521 | list_add(&t->tc, &v->tc); | |
e01402b1 RB |
1522 | |
1523 | /* deactivate all but vpe0 */ | |
07cc0c9e | 1524 | if (tc >= tclimit) { |
e01402b1 RB |
1525 | unsigned long tmp = read_vpe_c0_vpeconf0(); |
1526 | ||
1527 | tmp &= ~VPECONF0_VPA; | |
1528 | ||
1529 | /* master VPE */ | |
1530 | tmp |= VPECONF0_MVP; | |
1531 | write_vpe_c0_vpeconf0(tmp); | |
1532 | } | |
1533 | ||
1534 | /* disable multi-threading with TC's */ | |
1535 | write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() & ~VPECONTROL_TE); | |
1536 | ||
07cc0c9e | 1537 | if (tc >= vpelimit) { |
2600990e RB |
1538 | /* |
1539 | * Set config to be the same as vpe0, | |
1540 | * particularly kseg0 coherency alg | |
1541 | */ | |
e01402b1 RB |
1542 | write_vpe_c0_config(read_c0_config()); |
1543 | } | |
e01402b1 RB |
1544 | } |
1545 | ||
1546 | /* TC's */ | |
1547 | t->pvpe = v; /* set the parent vpe */ | |
1548 | ||
07cc0c9e | 1549 | if (tc >= tclimit) { |
e01402b1 RB |
1550 | unsigned long tmp; |
1551 | ||
07cc0c9e | 1552 | settc(tc); |
e01402b1 | 1553 | |
2600990e RB |
1554 | /* Any TC that is bound to VPE0 gets left as is - in case |
1555 | we are running SMTC on VPE0. A TC that is bound to any | |
1556 | other VPE gets bound to VPE0, ideally I'd like to make | |
1557 | it homeless but it doesn't appear to let me bind a TC | |
1558 | to a non-existent VPE. Which is perfectly reasonable. | |
1559 | ||
1560 | The (un)bound state is visible to an EJTAG probe so may | |
1561 | notify GDB... | |
1562 | */ | |
1563 | ||
1564 | if (((tmp = read_tc_c0_tcbind()) & TCBIND_CURVPE)) { | |
1565 | /* tc is bound >vpe0 */ | |
1566 | write_tc_c0_tcbind(tmp & ~TCBIND_CURVPE); | |
1567 | ||
1568 | t->pvpe = get_vpe(0); /* set the parent vpe */ | |
1569 | } | |
e01402b1 | 1570 | |
7c3a622d NS |
1571 | /* halt the TC */ |
1572 | write_tc_c0_tchalt(TCHALT_H); | |
1573 | mips_ihb(); | |
1574 | ||
e01402b1 RB |
1575 | tmp = read_tc_c0_tcstatus(); |
1576 | ||
2600990e | 1577 | /* mark not activated and not dynamically allocatable */ |
e01402b1 RB |
1578 | tmp &= ~(TCSTATUS_A | TCSTATUS_DA); |
1579 | tmp |= TCSTATUS_IXMT; /* interrupt exempt */ | |
1580 | write_tc_c0_tcstatus(tmp); | |
e01402b1 RB |
1581 | } |
1582 | } | |
1583 | ||
07cc0c9e | 1584 | out_reenable: |
e01402b1 | 1585 | /* release config state */ |
340ee4b9 | 1586 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 1587 | |
07cc0c9e RB |
1588 | evpe(vpflags); |
1589 | emt(mtflags); | |
1590 | local_irq_restore(flags); | |
1591 | ||
2600990e RB |
1592 | #ifdef CONFIG_MIPS_APSP_KSPD |
1593 | kspd_events.kspd_sp_exit = kspd_sp_exit; | |
1594 | #endif | |
e01402b1 | 1595 | return 0; |
27a3bbaf | 1596 | |
41790e04 RB |
1597 | out_class: |
1598 | class_unregister(&vpe_class); | |
27a3bbaf RB |
1599 | out_chrdev: |
1600 | unregister_chrdev(major, module_name); | |
1601 | ||
07cc0c9e | 1602 | out: |
27a3bbaf | 1603 | return err; |
e01402b1 RB |
1604 | } |
1605 | ||
1606 | static void __exit vpe_module_exit(void) | |
1607 | { | |
1608 | struct vpe *v, *n; | |
1609 | ||
1610 | list_for_each_entry_safe(v, n, &vpecontrol.vpe_list, list) { | |
1611 | if (v->state != VPE_STATE_UNUSED) { | |
1612 | release_vpe(v); | |
1613 | } | |
1614 | } | |
1615 | ||
736fad17 | 1616 | device_del(&vpe_device); |
e01402b1 RB |
1617 | unregister_chrdev(major, module_name); |
1618 | } | |
1619 | ||
1620 | module_init(vpe_module_init); | |
1621 | module_exit(vpe_module_exit); | |
1622 | MODULE_DESCRIPTION("MIPS VPE Loader"); | |
2600990e | 1623 | MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc."); |
e01402b1 | 1624 | MODULE_LICENSE("GPL"); |