Commit | Line | Data |
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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 | 75 | #ifdef CONFIG_MIPS_APSP_KSPD |
349c4229 | 76 | static struct kspd_notifications kspd_events; |
982f6ffe | 77 | static int kspd_events_reqd; |
2600990e RB |
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 | |
159 | /* get the vpe associated with this minor */ | |
f18b51cc | 160 | static struct vpe *get_vpe(int minor) |
e01402b1 RB |
161 | { |
162 | struct vpe *v; | |
163 | ||
2600990e RB |
164 | if (!cpu_has_mipsmt) |
165 | return NULL; | |
166 | ||
e01402b1 RB |
167 | list_for_each_entry(v, &vpecontrol.vpe_list, list) { |
168 | if (v->minor == minor) | |
169 | return v; | |
170 | } | |
171 | ||
e01402b1 RB |
172 | return NULL; |
173 | } | |
174 | ||
175 | /* get the vpe associated with this minor */ | |
f18b51cc | 176 | static struct tc *get_tc(int index) |
e01402b1 RB |
177 | { |
178 | struct tc *t; | |
179 | ||
180 | list_for_each_entry(t, &vpecontrol.tc_list, list) { | |
181 | if (t->index == index) | |
182 | return t; | |
183 | } | |
184 | ||
e01402b1 RB |
185 | return NULL; |
186 | } | |
187 | ||
e01402b1 | 188 | /* allocate a vpe and associate it with this minor (or index) */ |
f18b51cc | 189 | static struct vpe *alloc_vpe(int minor) |
e01402b1 RB |
190 | { |
191 | struct vpe *v; | |
192 | ||
307bd284 | 193 | if ((v = kzalloc(sizeof(struct vpe), GFP_KERNEL)) == NULL) { |
e01402b1 RB |
194 | return NULL; |
195 | } | |
196 | ||
e01402b1 RB |
197 | INIT_LIST_HEAD(&v->tc); |
198 | list_add_tail(&v->list, &vpecontrol.vpe_list); | |
199 | ||
2600990e | 200 | INIT_LIST_HEAD(&v->notify); |
e01402b1 RB |
201 | v->minor = minor; |
202 | return v; | |
203 | } | |
204 | ||
205 | /* allocate a tc. At startup only tc0 is running, all other can be halted. */ | |
f18b51cc | 206 | static struct tc *alloc_tc(int index) |
e01402b1 | 207 | { |
07cc0c9e | 208 | struct tc *tc; |
e01402b1 | 209 | |
07cc0c9e RB |
210 | if ((tc = kzalloc(sizeof(struct tc), GFP_KERNEL)) == NULL) |
211 | goto out; | |
e01402b1 | 212 | |
07cc0c9e RB |
213 | INIT_LIST_HEAD(&tc->tc); |
214 | tc->index = index; | |
215 | list_add_tail(&tc->list, &vpecontrol.tc_list); | |
e01402b1 | 216 | |
07cc0c9e RB |
217 | out: |
218 | return tc; | |
e01402b1 RB |
219 | } |
220 | ||
221 | /* clean up and free everything */ | |
f18b51cc | 222 | static void release_vpe(struct vpe *v) |
e01402b1 RB |
223 | { |
224 | list_del(&v->list); | |
225 | if (v->load_addr) | |
226 | release_progmem(v); | |
227 | kfree(v); | |
228 | } | |
229 | ||
f18b51cc | 230 | static void dump_mtregs(void) |
e01402b1 RB |
231 | { |
232 | unsigned long val; | |
233 | ||
234 | val = read_c0_config3(); | |
235 | printk("config3 0x%lx MT %ld\n", val, | |
236 | (val & CONFIG3_MT) >> CONFIG3_MT_SHIFT); | |
237 | ||
e01402b1 RB |
238 | val = read_c0_mvpcontrol(); |
239 | printk("MVPControl 0x%lx, STLB %ld VPC %ld EVP %ld\n", val, | |
240 | (val & MVPCONTROL_STLB) >> MVPCONTROL_STLB_SHIFT, | |
241 | (val & MVPCONTROL_VPC) >> MVPCONTROL_VPC_SHIFT, | |
242 | (val & MVPCONTROL_EVP)); | |
243 | ||
2600990e RB |
244 | val = read_c0_mvpconf0(); |
245 | printk("mvpconf0 0x%lx, PVPE %ld PTC %ld M %ld\n", val, | |
246 | (val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT, | |
247 | val & MVPCONF0_PTC, (val & MVPCONF0_M) >> MVPCONF0_M_SHIFT); | |
e01402b1 RB |
248 | } |
249 | ||
250 | /* Find some VPE program space */ | |
571e0bed | 251 | static void *alloc_progmem(unsigned long len) |
e01402b1 | 252 | { |
5408c490 RB |
253 | void *addr; |
254 | ||
e01402b1 | 255 | #ifdef CONFIG_MIPS_VPE_LOADER_TOM |
5408c490 RB |
256 | /* |
257 | * This means you must tell Linux to use less memory than you | |
258 | * physically have, for example by passing a mem= boot argument. | |
259 | */ | |
9f2546ad | 260 | addr = pfn_to_kaddr(max_low_pfn); |
5408c490 | 261 | memset(addr, 0, len); |
e01402b1 | 262 | #else |
5408c490 RB |
263 | /* simple grab some mem for now */ |
264 | addr = kzalloc(len, GFP_KERNEL); | |
e01402b1 | 265 | #endif |
5408c490 RB |
266 | |
267 | return addr; | |
e01402b1 RB |
268 | } |
269 | ||
270 | static void release_progmem(void *ptr) | |
271 | { | |
272 | #ifndef CONFIG_MIPS_VPE_LOADER_TOM | |
273 | kfree(ptr); | |
274 | #endif | |
275 | } | |
276 | ||
277 | /* Update size with this section: return offset. */ | |
278 | static long get_offset(unsigned long *size, Elf_Shdr * sechdr) | |
279 | { | |
280 | long ret; | |
281 | ||
282 | ret = ALIGN(*size, sechdr->sh_addralign ? : 1); | |
283 | *size = ret + sechdr->sh_size; | |
284 | return ret; | |
285 | } | |
286 | ||
287 | /* Lay out the SHF_ALLOC sections in a way not dissimilar to how ld | |
288 | might -- code, read-only data, read-write data, small data. Tally | |
289 | sizes, and place the offsets into sh_entsize fields: high bit means it | |
290 | belongs in init. */ | |
291 | static void layout_sections(struct module *mod, const Elf_Ehdr * hdr, | |
292 | Elf_Shdr * sechdrs, const char *secstrings) | |
293 | { | |
294 | static unsigned long const masks[][2] = { | |
295 | /* NOTE: all executable code must be the first section | |
296 | * in this array; otherwise modify the text_size | |
297 | * finder in the two loops below */ | |
298 | {SHF_EXECINSTR | SHF_ALLOC, ARCH_SHF_SMALL}, | |
299 | {SHF_ALLOC, SHF_WRITE | ARCH_SHF_SMALL}, | |
300 | {SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL}, | |
301 | {ARCH_SHF_SMALL | SHF_ALLOC, 0} | |
302 | }; | |
303 | unsigned int m, i; | |
304 | ||
305 | for (i = 0; i < hdr->e_shnum; i++) | |
306 | sechdrs[i].sh_entsize = ~0UL; | |
307 | ||
308 | for (m = 0; m < ARRAY_SIZE(masks); ++m) { | |
309 | for (i = 0; i < hdr->e_shnum; ++i) { | |
310 | Elf_Shdr *s = &sechdrs[i]; | |
311 | ||
312 | // || strncmp(secstrings + s->sh_name, ".init", 5) == 0) | |
313 | if ((s->sh_flags & masks[m][0]) != masks[m][0] | |
314 | || (s->sh_flags & masks[m][1]) | |
315 | || s->sh_entsize != ~0UL) | |
316 | continue; | |
e2a9cf96 RG |
317 | s->sh_entsize = |
318 | get_offset((unsigned long *)&mod->core_size, s); | |
e01402b1 RB |
319 | } |
320 | ||
321 | if (m == 0) | |
322 | mod->core_text_size = mod->core_size; | |
323 | ||
324 | } | |
325 | } | |
326 | ||
327 | ||
328 | /* from module-elf32.c, but subverted a little */ | |
329 | ||
330 | struct mips_hi16 { | |
331 | struct mips_hi16 *next; | |
332 | Elf32_Addr *addr; | |
333 | Elf32_Addr value; | |
334 | }; | |
335 | ||
336 | static struct mips_hi16 *mips_hi16_list; | |
337 | static unsigned int gp_offs, gp_addr; | |
338 | ||
339 | static int apply_r_mips_none(struct module *me, uint32_t *location, | |
340 | Elf32_Addr v) | |
341 | { | |
342 | return 0; | |
343 | } | |
344 | ||
345 | static int apply_r_mips_gprel16(struct module *me, uint32_t *location, | |
346 | Elf32_Addr v) | |
347 | { | |
348 | int rel; | |
349 | ||
350 | if( !(*location & 0xffff) ) { | |
351 | rel = (int)v - gp_addr; | |
352 | } | |
353 | else { | |
354 | /* .sbss + gp(relative) + offset */ | |
355 | /* kludge! */ | |
356 | rel = (int)(short)((int)v + gp_offs + | |
357 | (int)(short)(*location & 0xffff) - gp_addr); | |
358 | } | |
359 | ||
360 | if( (rel > 32768) || (rel < -32768) ) { | |
2600990e RB |
361 | printk(KERN_DEBUG "VPE loader: apply_r_mips_gprel16: " |
362 | "relative address 0x%x out of range of gp register\n", | |
363 | rel); | |
e01402b1 RB |
364 | return -ENOEXEC; |
365 | } | |
366 | ||
367 | *location = (*location & 0xffff0000) | (rel & 0xffff); | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | static int apply_r_mips_pc16(struct module *me, uint32_t *location, | |
373 | Elf32_Addr v) | |
374 | { | |
375 | int rel; | |
376 | rel = (((unsigned int)v - (unsigned int)location)); | |
377 | rel >>= 2; // because the offset is in _instructions_ not bytes. | |
378 | rel -= 1; // and one instruction less due to the branch delay slot. | |
379 | ||
380 | if( (rel > 32768) || (rel < -32768) ) { | |
2600990e RB |
381 | printk(KERN_DEBUG "VPE loader: " |
382 | "apply_r_mips_pc16: relative address out of range 0x%x\n", rel); | |
e01402b1 RB |
383 | return -ENOEXEC; |
384 | } | |
385 | ||
386 | *location = (*location & 0xffff0000) | (rel & 0xffff); | |
387 | ||
388 | return 0; | |
389 | } | |
390 | ||
391 | static int apply_r_mips_32(struct module *me, uint32_t *location, | |
392 | Elf32_Addr v) | |
393 | { | |
394 | *location += v; | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | static int apply_r_mips_26(struct module *me, uint32_t *location, | |
400 | Elf32_Addr v) | |
401 | { | |
402 | if (v % 4) { | |
2600990e RB |
403 | printk(KERN_DEBUG "VPE loader: apply_r_mips_26 " |
404 | " unaligned relocation\n"); | |
e01402b1 RB |
405 | return -ENOEXEC; |
406 | } | |
407 | ||
307bd284 RB |
408 | /* |
409 | * Not desperately convinced this is a good check of an overflow condition | |
410 | * anyway. But it gets in the way of handling undefined weak symbols which | |
411 | * we want to set to zero. | |
412 | * if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { | |
413 | * printk(KERN_ERR | |
414 | * "module %s: relocation overflow\n", | |
415 | * me->name); | |
416 | * return -ENOEXEC; | |
417 | * } | |
418 | */ | |
e01402b1 RB |
419 | |
420 | *location = (*location & ~0x03ffffff) | | |
421 | ((*location + (v >> 2)) & 0x03ffffff); | |
422 | return 0; | |
423 | } | |
424 | ||
425 | static int apply_r_mips_hi16(struct module *me, uint32_t *location, | |
426 | Elf32_Addr v) | |
427 | { | |
428 | struct mips_hi16 *n; | |
429 | ||
430 | /* | |
431 | * We cannot relocate this one now because we don't know the value of | |
432 | * the carry we need to add. Save the information, and let LO16 do the | |
433 | * actual relocation. | |
434 | */ | |
435 | n = kmalloc(sizeof *n, GFP_KERNEL); | |
436 | if (!n) | |
437 | return -ENOMEM; | |
438 | ||
439 | n->addr = location; | |
440 | n->value = v; | |
441 | n->next = mips_hi16_list; | |
442 | mips_hi16_list = n; | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
447 | static int apply_r_mips_lo16(struct module *me, uint32_t *location, | |
448 | Elf32_Addr v) | |
449 | { | |
450 | unsigned long insnlo = *location; | |
451 | Elf32_Addr val, vallo; | |
477c4b07 | 452 | struct mips_hi16 *l, *next; |
e01402b1 RB |
453 | |
454 | /* Sign extend the addend we extract from the lo insn. */ | |
455 | vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000; | |
456 | ||
457 | if (mips_hi16_list != NULL) { | |
e01402b1 RB |
458 | |
459 | l = mips_hi16_list; | |
460 | while (l != NULL) { | |
e01402b1 RB |
461 | unsigned long insn; |
462 | ||
463 | /* | |
464 | * The value for the HI16 had best be the same. | |
465 | */ | |
2600990e RB |
466 | if (v != l->value) { |
467 | printk(KERN_DEBUG "VPE loader: " | |
b1e3afa0 | 468 | "apply_r_mips_lo16/hi16: \t" |
2600990e | 469 | "inconsistent value information\n"); |
477c4b07 | 470 | goto out_free; |
e01402b1 RB |
471 | } |
472 | ||
e01402b1 RB |
473 | /* |
474 | * Do the HI16 relocation. Note that we actually don't | |
475 | * need to know anything about the LO16 itself, except | |
476 | * where to find the low 16 bits of the addend needed | |
477 | * by the LO16. | |
478 | */ | |
479 | insn = *l->addr; | |
480 | val = ((insn & 0xffff) << 16) + vallo; | |
481 | val += v; | |
482 | ||
483 | /* | |
484 | * Account for the sign extension that will happen in | |
485 | * the low bits. | |
486 | */ | |
487 | val = ((val >> 16) + ((val & 0x8000) != 0)) & 0xffff; | |
488 | ||
489 | insn = (insn & ~0xffff) | val; | |
490 | *l->addr = insn; | |
491 | ||
492 | next = l->next; | |
493 | kfree(l); | |
494 | l = next; | |
495 | } | |
496 | ||
497 | mips_hi16_list = NULL; | |
498 | } | |
499 | ||
500 | /* | |
501 | * Ok, we're done with the HI16 relocs. Now deal with the LO16. | |
502 | */ | |
503 | val = v + vallo; | |
504 | insnlo = (insnlo & ~0xffff) | (val & 0xffff); | |
505 | *location = insnlo; | |
506 | ||
507 | return 0; | |
477c4b07 RB |
508 | |
509 | out_free: | |
510 | while (l != NULL) { | |
511 | next = l->next; | |
512 | kfree(l); | |
513 | l = next; | |
514 | } | |
515 | mips_hi16_list = NULL; | |
516 | ||
517 | return -ENOEXEC; | |
e01402b1 RB |
518 | } |
519 | ||
520 | static int (*reloc_handlers[]) (struct module *me, uint32_t *location, | |
521 | Elf32_Addr v) = { | |
522 | [R_MIPS_NONE] = apply_r_mips_none, | |
523 | [R_MIPS_32] = apply_r_mips_32, | |
524 | [R_MIPS_26] = apply_r_mips_26, | |
525 | [R_MIPS_HI16] = apply_r_mips_hi16, | |
526 | [R_MIPS_LO16] = apply_r_mips_lo16, | |
527 | [R_MIPS_GPREL16] = apply_r_mips_gprel16, | |
528 | [R_MIPS_PC16] = apply_r_mips_pc16 | |
529 | }; | |
530 | ||
2600990e | 531 | static char *rstrs[] = { |
e0daad44 | 532 | [R_MIPS_NONE] = "MIPS_NONE", |
2600990e RB |
533 | [R_MIPS_32] = "MIPS_32", |
534 | [R_MIPS_26] = "MIPS_26", | |
535 | [R_MIPS_HI16] = "MIPS_HI16", | |
536 | [R_MIPS_LO16] = "MIPS_LO16", | |
537 | [R_MIPS_GPREL16] = "MIPS_GPREL16", | |
538 | [R_MIPS_PC16] = "MIPS_PC16" | |
539 | }; | |
e01402b1 | 540 | |
f18b51cc | 541 | static int apply_relocations(Elf32_Shdr *sechdrs, |
e01402b1 RB |
542 | const char *strtab, |
543 | unsigned int symindex, | |
544 | unsigned int relsec, | |
545 | struct module *me) | |
546 | { | |
547 | Elf32_Rel *rel = (void *) sechdrs[relsec].sh_addr; | |
548 | Elf32_Sym *sym; | |
549 | uint32_t *location; | |
550 | unsigned int i; | |
551 | Elf32_Addr v; | |
552 | int res; | |
553 | ||
554 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { | |
555 | Elf32_Word r_info = rel[i].r_info; | |
556 | ||
557 | /* This is where to make the change */ | |
558 | location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr | |
559 | + rel[i].r_offset; | |
560 | /* This is the symbol it is referring to */ | |
561 | sym = (Elf32_Sym *)sechdrs[symindex].sh_addr | |
562 | + ELF32_R_SYM(r_info); | |
563 | ||
564 | if (!sym->st_value) { | |
565 | printk(KERN_DEBUG "%s: undefined weak symbol %s\n", | |
566 | me->name, strtab + sym->st_name); | |
567 | /* just print the warning, dont barf */ | |
568 | } | |
569 | ||
570 | v = sym->st_value; | |
571 | ||
572 | res = reloc_handlers[ELF32_R_TYPE(r_info)](me, location, v); | |
573 | if( res ) { | |
2600990e RB |
574 | char *r = rstrs[ELF32_R_TYPE(r_info)]; |
575 | printk(KERN_WARNING "VPE loader: .text+0x%x " | |
576 | "relocation type %s for symbol \"%s\" failed\n", | |
577 | rel[i].r_offset, r ? r : "UNKNOWN", | |
578 | strtab + sym->st_name); | |
e01402b1 | 579 | return res; |
2600990e | 580 | } |
e01402b1 RB |
581 | } |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
f18b51cc | 586 | static inline void save_gp_address(unsigned int secbase, unsigned int rel) |
e01402b1 RB |
587 | { |
588 | gp_addr = secbase + rel; | |
589 | gp_offs = gp_addr - (secbase & 0xffff0000); | |
590 | } | |
591 | /* end module-elf32.c */ | |
592 | ||
593 | ||
594 | ||
595 | /* Change all symbols so that sh_value encodes the pointer directly. */ | |
2600990e | 596 | static void simplify_symbols(Elf_Shdr * sechdrs, |
e01402b1 RB |
597 | unsigned int symindex, |
598 | const char *strtab, | |
599 | const char *secstrings, | |
600 | unsigned int nsecs, struct module *mod) | |
601 | { | |
602 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
603 | unsigned long secbase, bssbase = 0; | |
604 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
2600990e | 605 | int size; |
e01402b1 RB |
606 | |
607 | /* find the .bss section for COMMON symbols */ | |
608 | for (i = 0; i < nsecs; i++) { | |
2600990e | 609 | if (strncmp(secstrings + sechdrs[i].sh_name, ".bss", 4) == 0) { |
e01402b1 | 610 | bssbase = sechdrs[i].sh_addr; |
2600990e RB |
611 | break; |
612 | } | |
e01402b1 RB |
613 | } |
614 | ||
615 | for (i = 1; i < n; i++) { | |
616 | switch (sym[i].st_shndx) { | |
617 | case SHN_COMMON: | |
2600990e RB |
618 | /* Allocate space for the symbol in the .bss section. |
619 | st_value is currently size. | |
e01402b1 RB |
620 | We want it to have the address of the symbol. */ |
621 | ||
622 | size = sym[i].st_value; | |
623 | sym[i].st_value = bssbase; | |
624 | ||
625 | bssbase += size; | |
626 | break; | |
627 | ||
628 | case SHN_ABS: | |
629 | /* Don't need to do anything */ | |
630 | break; | |
631 | ||
632 | case SHN_UNDEF: | |
633 | /* ret = -ENOENT; */ | |
634 | break; | |
635 | ||
636 | case SHN_MIPS_SCOMMON: | |
b1e3afa0 | 637 | printk(KERN_DEBUG "simplify_symbols: ignoring SHN_MIPS_SCOMMON " |
2600990e RB |
638 | "symbol <%s> st_shndx %d\n", strtab + sym[i].st_name, |
639 | sym[i].st_shndx); | |
e01402b1 RB |
640 | // .sbss section |
641 | break; | |
642 | ||
643 | default: | |
644 | secbase = sechdrs[sym[i].st_shndx].sh_addr; | |
645 | ||
646 | if (strncmp(strtab + sym[i].st_name, "_gp", 3) == 0) { | |
647 | save_gp_address(secbase, sym[i].st_value); | |
648 | } | |
649 | ||
650 | sym[i].st_value += secbase; | |
651 | break; | |
652 | } | |
e01402b1 | 653 | } |
e01402b1 RB |
654 | } |
655 | ||
656 | #ifdef DEBUG_ELFLOADER | |
657 | static void dump_elfsymbols(Elf_Shdr * sechdrs, unsigned int symindex, | |
658 | const char *strtab, struct module *mod) | |
659 | { | |
660 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
661 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
662 | ||
663 | printk(KERN_DEBUG "dump_elfsymbols: n %d\n", n); | |
664 | for (i = 1; i < n; i++) { | |
665 | printk(KERN_DEBUG " i %d name <%s> 0x%x\n", i, | |
666 | strtab + sym[i].st_name, sym[i].st_value); | |
667 | } | |
668 | } | |
669 | #endif | |
670 | ||
e01402b1 | 671 | /* We are prepared so configure and start the VPE... */ |
be6e1437 | 672 | static int vpe_run(struct vpe * v) |
e01402b1 | 673 | { |
07cc0c9e | 674 | unsigned long flags, val, dmt_flag; |
2600990e | 675 | struct vpe_notifications *n; |
07cc0c9e | 676 | unsigned int vpeflags; |
e01402b1 RB |
677 | struct tc *t; |
678 | ||
679 | /* check we are the Master VPE */ | |
07cc0c9e | 680 | local_irq_save(flags); |
e01402b1 RB |
681 | val = read_c0_vpeconf0(); |
682 | if (!(val & VPECONF0_MVP)) { | |
683 | printk(KERN_WARNING | |
2600990e | 684 | "VPE loader: only Master VPE's are allowed to configure MT\n"); |
07cc0c9e RB |
685 | local_irq_restore(flags); |
686 | ||
e01402b1 RB |
687 | return -1; |
688 | } | |
689 | ||
07cc0c9e RB |
690 | dmt_flag = dmt(); |
691 | vpeflags = dvpe(); | |
e01402b1 | 692 | |
2600990e | 693 | if (!list_empty(&v->tc)) { |
e0daad44 | 694 | if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { |
07cc0c9e RB |
695 | evpe(vpeflags); |
696 | emt(dmt_flag); | |
697 | local_irq_restore(flags); | |
698 | ||
699 | printk(KERN_WARNING | |
700 | "VPE loader: TC %d is already in use.\n", | |
701 | t->index); | |
e0daad44 RB |
702 | return -ENOEXEC; |
703 | } | |
704 | } else { | |
07cc0c9e RB |
705 | evpe(vpeflags); |
706 | emt(dmt_flag); | |
707 | local_irq_restore(flags); | |
708 | ||
709 | printk(KERN_WARNING | |
710 | "VPE loader: No TC's associated with VPE %d\n", | |
e0daad44 | 711 | v->minor); |
07cc0c9e | 712 | |
e0daad44 RB |
713 | return -ENOEXEC; |
714 | } | |
2600990e | 715 | |
e01402b1 | 716 | /* Put MVPE's into 'configuration state' */ |
340ee4b9 | 717 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 718 | |
e01402b1 RB |
719 | settc(t->index); |
720 | ||
e01402b1 RB |
721 | /* should check it is halted, and not activated */ |
722 | if ((read_tc_c0_tcstatus() & TCSTATUS_A) || !(read_tc_c0_tchalt() & TCHALT_H)) { | |
07cc0c9e RB |
723 | evpe(vpeflags); |
724 | emt(dmt_flag); | |
725 | local_irq_restore(flags); | |
726 | ||
727 | printk(KERN_WARNING "VPE loader: TC %d is already active!\n", | |
e01402b1 | 728 | t->index); |
07cc0c9e | 729 | |
e01402b1 RB |
730 | return -ENOEXEC; |
731 | } | |
732 | ||
733 | /* Write the address we want it to start running from in the TCPC register. */ | |
734 | write_tc_c0_tcrestart((unsigned long)v->__start); | |
e01402b1 | 735 | write_tc_c0_tccontext((unsigned long)0); |
07cc0c9e | 736 | |
2600990e RB |
737 | /* |
738 | * Mark the TC as activated, not interrupt exempt and not dynamically | |
739 | * allocatable | |
740 | */ | |
e01402b1 RB |
741 | val = read_tc_c0_tcstatus(); |
742 | val = (val & ~(TCSTATUS_DA | TCSTATUS_IXMT)) | TCSTATUS_A; | |
743 | write_tc_c0_tcstatus(val); | |
744 | ||
745 | write_tc_c0_tchalt(read_tc_c0_tchalt() & ~TCHALT_H); | |
746 | ||
e01402b1 RB |
747 | /* |
748 | * The sde-kit passes 'memsize' to __start in $a3, so set something | |
2600990e | 749 | * here... Or set $a3 to zero and define DFLT_STACK_SIZE and |
e01402b1 RB |
750 | * DFLT_HEAP_SIZE when you compile your program |
751 | */ | |
41790e04 | 752 | mttgpr(6, v->ntcs); |
07cc0c9e | 753 | mttgpr(7, physical_memsize); |
2600990e RB |
754 | |
755 | /* set up VPE1 */ | |
756 | /* | |
757 | * bind the TC to VPE 1 as late as possible so we only have the final | |
758 | * VPE registers to set up, and so an EJTAG probe can trigger on it | |
759 | */ | |
07cc0c9e | 760 | write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | 1); |
e01402b1 | 761 | |
a94d7020 EO |
762 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~(VPECONF0_VPA)); |
763 | ||
764 | back_to_back_c0_hazard(); | |
765 | ||
e0daad44 RB |
766 | /* Set up the XTC bit in vpeconf0 to point at our tc */ |
767 | write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC)) | |
768 | | (t->index << VPECONF0_XTC_SHIFT)); | |
e01402b1 | 769 | |
a94d7020 EO |
770 | back_to_back_c0_hazard(); |
771 | ||
e0daad44 RB |
772 | /* enable this VPE */ |
773 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); | |
e01402b1 RB |
774 | |
775 | /* clear out any left overs from a previous program */ | |
2600990e | 776 | write_vpe_c0_status(0); |
e01402b1 RB |
777 | write_vpe_c0_cause(0); |
778 | ||
779 | /* take system out of configuration state */ | |
340ee4b9 | 780 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 781 | |
b618336a KK |
782 | /* |
783 | * SMTC/SMVP kernels manage VPE enable independently, | |
784 | * but uniprocessor kernels need to turn it on, even | |
785 | * if that wasn't the pre-dvpe() state. | |
786 | */ | |
07cc0c9e | 787 | #ifdef CONFIG_SMP |
07cc0c9e | 788 | evpe(vpeflags); |
b618336a KK |
789 | #else |
790 | evpe(EVPE_ENABLE); | |
07cc0c9e RB |
791 | #endif |
792 | emt(dmt_flag); | |
793 | local_irq_restore(flags); | |
e01402b1 | 794 | |
07cc0c9e RB |
795 | list_for_each_entry(n, &v->notify, list) |
796 | n->start(minor); | |
2600990e | 797 | |
e01402b1 RB |
798 | return 0; |
799 | } | |
800 | ||
2600990e | 801 | static int find_vpe_symbols(struct vpe * v, Elf_Shdr * sechdrs, |
e01402b1 RB |
802 | unsigned int symindex, const char *strtab, |
803 | struct module *mod) | |
804 | { | |
805 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
806 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
807 | ||
808 | for (i = 1; i < n; i++) { | |
809 | if (strcmp(strtab + sym[i].st_name, "__start") == 0) { | |
810 | v->__start = sym[i].st_value; | |
811 | } | |
812 | ||
813 | if (strcmp(strtab + sym[i].st_name, "vpe_shared") == 0) { | |
814 | v->shared_ptr = (void *)sym[i].st_value; | |
815 | } | |
816 | } | |
817 | ||
2600990e RB |
818 | if ( (v->__start == 0) || (v->shared_ptr == NULL)) |
819 | return -1; | |
820 | ||
e01402b1 RB |
821 | return 0; |
822 | } | |
823 | ||
307bd284 | 824 | /* |
2600990e RB |
825 | * Allocates a VPE with some program code space(the load address), copies the |
826 | * contents of the program (p)buffer performing relocatations/etc, free's it | |
827 | * when finished. | |
828 | */ | |
be6e1437 | 829 | static int vpe_elfload(struct vpe * v) |
e01402b1 RB |
830 | { |
831 | Elf_Ehdr *hdr; | |
832 | Elf_Shdr *sechdrs; | |
833 | long err = 0; | |
834 | char *secstrings, *strtab = NULL; | |
2600990e | 835 | unsigned int len, i, symindex = 0, strindex = 0, relocate = 0; |
e01402b1 RB |
836 | struct module mod; // so we can re-use the relocations code |
837 | ||
838 | memset(&mod, 0, sizeof(struct module)); | |
2600990e | 839 | strcpy(mod.name, "VPE loader"); |
e01402b1 RB |
840 | |
841 | hdr = (Elf_Ehdr *) v->pbuffer; | |
842 | len = v->plen; | |
843 | ||
844 | /* Sanity checks against insmoding binaries or wrong arch, | |
845 | weird elf version */ | |
d303f4a1 | 846 | if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0 |
2600990e RB |
847 | || (hdr->e_type != ET_REL && hdr->e_type != ET_EXEC) |
848 | || !elf_check_arch(hdr) | |
e01402b1 RB |
849 | || hdr->e_shentsize != sizeof(*sechdrs)) { |
850 | printk(KERN_WARNING | |
2600990e | 851 | "VPE loader: program wrong arch or weird elf version\n"); |
e01402b1 RB |
852 | |
853 | return -ENOEXEC; | |
854 | } | |
855 | ||
2600990e RB |
856 | if (hdr->e_type == ET_REL) |
857 | relocate = 1; | |
858 | ||
e01402b1 | 859 | if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) { |
2600990e RB |
860 | printk(KERN_ERR "VPE loader: program length %u truncated\n", |
861 | len); | |
862 | ||
e01402b1 RB |
863 | return -ENOEXEC; |
864 | } | |
865 | ||
866 | /* Convenience variables */ | |
867 | sechdrs = (void *)hdr + hdr->e_shoff; | |
868 | secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; | |
869 | sechdrs[0].sh_addr = 0; | |
870 | ||
871 | /* And these should exist, but gcc whinges if we don't init them */ | |
872 | symindex = strindex = 0; | |
873 | ||
2600990e RB |
874 | if (relocate) { |
875 | for (i = 1; i < hdr->e_shnum; i++) { | |
876 | if (sechdrs[i].sh_type != SHT_NOBITS | |
877 | && len < sechdrs[i].sh_offset + sechdrs[i].sh_size) { | |
878 | printk(KERN_ERR "VPE program length %u truncated\n", | |
879 | len); | |
880 | return -ENOEXEC; | |
881 | } | |
e01402b1 | 882 | |
2600990e RB |
883 | /* Mark all sections sh_addr with their address in the |
884 | temporary image. */ | |
885 | sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; | |
e01402b1 | 886 | |
2600990e RB |
887 | /* Internal symbols and strings. */ |
888 | if (sechdrs[i].sh_type == SHT_SYMTAB) { | |
889 | symindex = i; | |
890 | strindex = sechdrs[i].sh_link; | |
891 | strtab = (char *)hdr + sechdrs[strindex].sh_offset; | |
892 | } | |
e01402b1 | 893 | } |
2600990e | 894 | layout_sections(&mod, hdr, sechdrs, secstrings); |
e01402b1 RB |
895 | } |
896 | ||
e01402b1 | 897 | v->load_addr = alloc_progmem(mod.core_size); |
5408c490 RB |
898 | if (!v->load_addr) |
899 | return -ENOMEM; | |
e01402b1 | 900 | |
5408c490 | 901 | pr_info("VPE loader: loading to %p\n", v->load_addr); |
e01402b1 | 902 | |
2600990e RB |
903 | if (relocate) { |
904 | for (i = 0; i < hdr->e_shnum; i++) { | |
905 | void *dest; | |
e01402b1 | 906 | |
2600990e RB |
907 | if (!(sechdrs[i].sh_flags & SHF_ALLOC)) |
908 | continue; | |
e01402b1 | 909 | |
2600990e | 910 | dest = v->load_addr + sechdrs[i].sh_entsize; |
e01402b1 | 911 | |
2600990e RB |
912 | if (sechdrs[i].sh_type != SHT_NOBITS) |
913 | memcpy(dest, (void *)sechdrs[i].sh_addr, | |
914 | sechdrs[i].sh_size); | |
915 | /* Update sh_addr to point to copy in image. */ | |
916 | sechdrs[i].sh_addr = (unsigned long)dest; | |
e01402b1 | 917 | |
2600990e RB |
918 | printk(KERN_DEBUG " section sh_name %s sh_addr 0x%x\n", |
919 | secstrings + sechdrs[i].sh_name, sechdrs[i].sh_addr); | |
920 | } | |
e01402b1 | 921 | |
2600990e RB |
922 | /* Fix up syms, so that st_value is a pointer to location. */ |
923 | simplify_symbols(sechdrs, symindex, strtab, secstrings, | |
924 | hdr->e_shnum, &mod); | |
925 | ||
926 | /* Now do relocations. */ | |
927 | for (i = 1; i < hdr->e_shnum; i++) { | |
928 | const char *strtab = (char *)sechdrs[strindex].sh_addr; | |
929 | unsigned int info = sechdrs[i].sh_info; | |
930 | ||
931 | /* Not a valid relocation section? */ | |
932 | if (info >= hdr->e_shnum) | |
933 | continue; | |
934 | ||
935 | /* Don't bother with non-allocated sections */ | |
936 | if (!(sechdrs[info].sh_flags & SHF_ALLOC)) | |
937 | continue; | |
938 | ||
939 | if (sechdrs[i].sh_type == SHT_REL) | |
940 | err = apply_relocations(sechdrs, strtab, symindex, i, | |
941 | &mod); | |
942 | else if (sechdrs[i].sh_type == SHT_RELA) | |
943 | err = apply_relocate_add(sechdrs, strtab, symindex, i, | |
944 | &mod); | |
945 | if (err < 0) | |
946 | return err; | |
947 | ||
948 | } | |
949 | } else { | |
bdf5d42c | 950 | struct elf_phdr *phdr = (struct elf_phdr *) ((char *)hdr + hdr->e_phoff); |
2600990e | 951 | |
bdf5d42c | 952 | for (i = 0; i < hdr->e_phnum; i++) { |
b618336a KK |
953 | if (phdr->p_type == PT_LOAD) { |
954 | memcpy((void *)phdr->p_paddr, | |
955 | (char *)hdr + phdr->p_offset, | |
956 | phdr->p_filesz); | |
957 | memset((void *)phdr->p_paddr + phdr->p_filesz, | |
958 | 0, phdr->p_memsz - phdr->p_filesz); | |
959 | } | |
960 | phdr++; | |
bdf5d42c RB |
961 | } |
962 | ||
963 | for (i = 0; i < hdr->e_shnum; i++) { | |
2600990e RB |
964 | /* Internal symbols and strings. */ |
965 | if (sechdrs[i].sh_type == SHT_SYMTAB) { | |
966 | symindex = i; | |
967 | strindex = sechdrs[i].sh_link; | |
968 | strtab = (char *)hdr + sechdrs[strindex].sh_offset; | |
969 | ||
970 | /* mark the symtab's address for when we try to find the | |
971 | magic symbols */ | |
972 | sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; | |
973 | } | |
e01402b1 RB |
974 | } |
975 | } | |
976 | ||
977 | /* make sure it's physically written out */ | |
978 | flush_icache_range((unsigned long)v->load_addr, | |
979 | (unsigned long)v->load_addr + v->len); | |
980 | ||
981 | if ((find_vpe_symbols(v, sechdrs, symindex, strtab, &mod)) < 0) { | |
2600990e RB |
982 | if (v->__start == 0) { |
983 | printk(KERN_WARNING "VPE loader: program does not contain " | |
984 | "a __start symbol\n"); | |
985 | return -ENOEXEC; | |
986 | } | |
e01402b1 | 987 | |
2600990e RB |
988 | if (v->shared_ptr == NULL) |
989 | printk(KERN_WARNING "VPE loader: " | |
990 | "program does not contain vpe_shared symbol.\n" | |
991 | " Unable to use AMVP (AP/SP) facilities.\n"); | |
e01402b1 RB |
992 | } |
993 | ||
994 | printk(" elf loaded\n"); | |
2600990e | 995 | return 0; |
e01402b1 RB |
996 | } |
997 | ||
2600990e RB |
998 | static void cleanup_tc(struct tc *tc) |
999 | { | |
07cc0c9e RB |
1000 | unsigned long flags; |
1001 | unsigned int mtflags, vpflags; | |
2600990e RB |
1002 | int tmp; |
1003 | ||
07cc0c9e RB |
1004 | local_irq_save(flags); |
1005 | mtflags = dmt(); | |
1006 | vpflags = dvpe(); | |
2600990e RB |
1007 | /* Put MVPE's into 'configuration state' */ |
1008 | set_c0_mvpcontrol(MVPCONTROL_VPC); | |
1009 | ||
1010 | settc(tc->index); | |
1011 | tmp = read_tc_c0_tcstatus(); | |
1012 | ||
1013 | /* mark not allocated and not dynamically allocatable */ | |
1014 | tmp &= ~(TCSTATUS_A | TCSTATUS_DA); | |
1015 | tmp |= TCSTATUS_IXMT; /* interrupt exempt */ | |
1016 | write_tc_c0_tcstatus(tmp); | |
1017 | ||
1018 | write_tc_c0_tchalt(TCHALT_H); | |
7c3a622d | 1019 | mips_ihb(); |
2600990e RB |
1020 | |
1021 | /* bind it to anything other than VPE1 */ | |
07cc0c9e | 1022 | // write_tc_c0_tcbind(read_tc_c0_tcbind() & ~TCBIND_CURVPE); // | TCBIND_CURVPE |
2600990e RB |
1023 | |
1024 | clear_c0_mvpcontrol(MVPCONTROL_VPC); | |
07cc0c9e RB |
1025 | evpe(vpflags); |
1026 | emt(mtflags); | |
1027 | local_irq_restore(flags); | |
2600990e RB |
1028 | } |
1029 | ||
1030 | static int getcwd(char *buff, int size) | |
1031 | { | |
1032 | mm_segment_t old_fs; | |
1033 | int ret; | |
1034 | ||
1035 | old_fs = get_fs(); | |
1036 | set_fs(KERNEL_DS); | |
1037 | ||
21a151d8 | 1038 | ret = sys_getcwd(buff, size); |
2600990e RB |
1039 | |
1040 | set_fs(old_fs); | |
1041 | ||
1042 | return ret; | |
1043 | } | |
1044 | ||
1045 | /* checks VPE is unused and gets ready to load program */ | |
e01402b1 RB |
1046 | static int vpe_open(struct inode *inode, struct file *filp) |
1047 | { | |
c4c4018b | 1048 | enum vpe_state state; |
2600990e | 1049 | struct vpe_notifications *not; |
07cc0c9e | 1050 | struct vpe *v; |
7558da94 | 1051 | int ret, err = 0; |
e01402b1 | 1052 | |
7558da94 | 1053 | lock_kernel(); |
07cc0c9e RB |
1054 | if (minor != iminor(inode)) { |
1055 | /* assume only 1 device at the moment. */ | |
2600990e | 1056 | printk(KERN_WARNING "VPE loader: only vpe1 is supported\n"); |
7558da94 JC |
1057 | err = -ENODEV; |
1058 | goto out; | |
e01402b1 RB |
1059 | } |
1060 | ||
07cc0c9e | 1061 | if ((v = get_vpe(tclimit)) == NULL) { |
2600990e | 1062 | printk(KERN_WARNING "VPE loader: unable to get vpe\n"); |
7558da94 JC |
1063 | err = -ENODEV; |
1064 | goto out; | |
e01402b1 RB |
1065 | } |
1066 | ||
c4c4018b RB |
1067 | state = xchg(&v->state, VPE_STATE_INUSE); |
1068 | if (state != VPE_STATE_UNUSED) { | |
2600990e | 1069 | printk(KERN_DEBUG "VPE loader: tc in use dumping regs\n"); |
e01402b1 | 1070 | |
2600990e | 1071 | list_for_each_entry(not, &v->notify, list) { |
07cc0c9e | 1072 | not->stop(tclimit); |
2600990e | 1073 | } |
e01402b1 | 1074 | |
2600990e | 1075 | release_progmem(v->load_addr); |
07cc0c9e | 1076 | cleanup_tc(get_tc(tclimit)); |
e01402b1 RB |
1077 | } |
1078 | ||
e01402b1 RB |
1079 | /* this of-course trashes what was there before... */ |
1080 | v->pbuffer = vmalloc(P_SIZE); | |
1081 | v->plen = P_SIZE; | |
1082 | v->load_addr = NULL; | |
1083 | v->len = 0; | |
1084 | ||
d76b0d9b DH |
1085 | v->uid = filp->f_cred->fsuid; |
1086 | v->gid = filp->f_cred->fsgid; | |
2600990e RB |
1087 | |
1088 | #ifdef CONFIG_MIPS_APSP_KSPD | |
1089 | /* get kspd to tell us when a syscall_exit happens */ | |
1090 | if (!kspd_events_reqd) { | |
1091 | kspd_notify(&kspd_events); | |
1092 | kspd_events_reqd++; | |
1093 | } | |
1094 | #endif | |
1095 | ||
1096 | v->cwd[0] = 0; | |
1097 | ret = getcwd(v->cwd, VPE_PATH_MAX); | |
1098 | if (ret < 0) | |
1099 | printk(KERN_WARNING "VPE loader: open, getcwd returned %d\n", ret); | |
1100 | ||
1101 | v->shared_ptr = NULL; | |
1102 | v->__start = 0; | |
07cc0c9e | 1103 | |
7558da94 JC |
1104 | out: |
1105 | unlock_kernel(); | |
e01402b1 RB |
1106 | return 0; |
1107 | } | |
1108 | ||
1109 | static int vpe_release(struct inode *inode, struct file *filp) | |
1110 | { | |
307bd284 | 1111 | struct vpe *v; |
e01402b1 | 1112 | Elf_Ehdr *hdr; |
07cc0c9e | 1113 | int ret = 0; |
e01402b1 | 1114 | |
07cc0c9e RB |
1115 | v = get_vpe(tclimit); |
1116 | if (v == NULL) | |
e01402b1 RB |
1117 | return -ENODEV; |
1118 | ||
e01402b1 | 1119 | hdr = (Elf_Ehdr *) v->pbuffer; |
d303f4a1 | 1120 | if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) == 0) { |
07cc0c9e | 1121 | if (vpe_elfload(v) >= 0) { |
e01402b1 | 1122 | vpe_run(v); |
07cc0c9e | 1123 | } else { |
2600990e | 1124 | printk(KERN_WARNING "VPE loader: ELF load failed.\n"); |
e01402b1 RB |
1125 | ret = -ENOEXEC; |
1126 | } | |
1127 | } else { | |
2600990e | 1128 | printk(KERN_WARNING "VPE loader: only elf files are supported\n"); |
e01402b1 RB |
1129 | ret = -ENOEXEC; |
1130 | } | |
1131 | ||
2600990e RB |
1132 | /* It's good to be able to run the SP and if it chokes have a look at |
1133 | the /dev/rt?. But if we reset the pointer to the shared struct we | |
8ebcfc8b | 1134 | lose what has happened. So perhaps if garbage is sent to the vpe |
2600990e RB |
1135 | device, use it as a trigger for the reset. Hopefully a nice |
1136 | executable will be along shortly. */ | |
1137 | if (ret < 0) | |
1138 | v->shared_ptr = NULL; | |
1139 | ||
e01402b1 RB |
1140 | // cleanup any temp buffers |
1141 | if (v->pbuffer) | |
1142 | vfree(v->pbuffer); | |
1143 | v->plen = 0; | |
1144 | return ret; | |
1145 | } | |
1146 | ||
1147 | static ssize_t vpe_write(struct file *file, const char __user * buffer, | |
1148 | size_t count, loff_t * ppos) | |
1149 | { | |
e01402b1 | 1150 | size_t ret = count; |
307bd284 | 1151 | struct vpe *v; |
e01402b1 | 1152 | |
07cc0c9e RB |
1153 | if (iminor(file->f_path.dentry->d_inode) != minor) |
1154 | return -ENODEV; | |
1155 | ||
1156 | v = get_vpe(tclimit); | |
1157 | if (v == NULL) | |
e01402b1 RB |
1158 | return -ENODEV; |
1159 | ||
1160 | if (v->pbuffer == NULL) { | |
2600990e | 1161 | printk(KERN_ERR "VPE loader: no buffer for program\n"); |
e01402b1 RB |
1162 | return -ENOMEM; |
1163 | } | |
1164 | ||
1165 | if ((count + v->len) > v->plen) { | |
1166 | printk(KERN_WARNING | |
2600990e | 1167 | "VPE loader: elf size too big. Perhaps strip uneeded symbols\n"); |
e01402b1 RB |
1168 | return -ENOMEM; |
1169 | } | |
1170 | ||
1171 | count -= copy_from_user(v->pbuffer + v->len, buffer, count); | |
2600990e | 1172 | if (!count) |
e01402b1 | 1173 | return -EFAULT; |
e01402b1 RB |
1174 | |
1175 | v->len += count; | |
1176 | return ret; | |
1177 | } | |
1178 | ||
5dfe4c96 | 1179 | static const struct file_operations vpe_fops = { |
e01402b1 RB |
1180 | .owner = THIS_MODULE, |
1181 | .open = vpe_open, | |
1182 | .release = vpe_release, | |
1183 | .write = vpe_write | |
1184 | }; | |
1185 | ||
1186 | /* module wrapper entry points */ | |
1187 | /* give me a vpe */ | |
1188 | vpe_handle vpe_alloc(void) | |
1189 | { | |
1190 | int i; | |
1191 | struct vpe *v; | |
1192 | ||
1193 | /* find a vpe */ | |
1194 | for (i = 1; i < MAX_VPES; i++) { | |
1195 | if ((v = get_vpe(i)) != NULL) { | |
1196 | v->state = VPE_STATE_INUSE; | |
1197 | return v; | |
1198 | } | |
1199 | } | |
1200 | return NULL; | |
1201 | } | |
1202 | ||
1203 | EXPORT_SYMBOL(vpe_alloc); | |
1204 | ||
1205 | /* start running from here */ | |
1206 | int vpe_start(vpe_handle vpe, unsigned long start) | |
1207 | { | |
1208 | struct vpe *v = vpe; | |
1209 | ||
1210 | v->__start = start; | |
1211 | return vpe_run(v); | |
1212 | } | |
1213 | ||
1214 | EXPORT_SYMBOL(vpe_start); | |
1215 | ||
1216 | /* halt it for now */ | |
1217 | int vpe_stop(vpe_handle vpe) | |
1218 | { | |
1219 | struct vpe *v = vpe; | |
1220 | struct tc *t; | |
1221 | unsigned int evpe_flags; | |
1222 | ||
1223 | evpe_flags = dvpe(); | |
1224 | ||
1225 | if ((t = list_entry(v->tc.next, struct tc, tc)) != NULL) { | |
1226 | ||
1227 | settc(t->index); | |
1228 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); | |
1229 | } | |
1230 | ||
1231 | evpe(evpe_flags); | |
1232 | ||
1233 | return 0; | |
1234 | } | |
1235 | ||
1236 | EXPORT_SYMBOL(vpe_stop); | |
1237 | ||
1238 | /* I've done with it thank you */ | |
1239 | int vpe_free(vpe_handle vpe) | |
1240 | { | |
1241 | struct vpe *v = vpe; | |
1242 | struct tc *t; | |
1243 | unsigned int evpe_flags; | |
1244 | ||
1245 | if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { | |
1246 | return -ENOEXEC; | |
1247 | } | |
1248 | ||
1249 | evpe_flags = dvpe(); | |
1250 | ||
1251 | /* Put MVPE's into 'configuration state' */ | |
340ee4b9 | 1252 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1253 | |
1254 | settc(t->index); | |
1255 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); | |
1256 | ||
7c3a622d | 1257 | /* halt the TC */ |
e01402b1 | 1258 | write_tc_c0_tchalt(TCHALT_H); |
7c3a622d NS |
1259 | mips_ihb(); |
1260 | ||
1261 | /* mark the TC unallocated */ | |
1262 | write_tc_c0_tcstatus(read_tc_c0_tcstatus() & ~TCSTATUS_A); | |
e01402b1 RB |
1263 | |
1264 | v->state = VPE_STATE_UNUSED; | |
1265 | ||
340ee4b9 | 1266 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1267 | evpe(evpe_flags); |
1268 | ||
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | EXPORT_SYMBOL(vpe_free); | |
1273 | ||
1274 | void *vpe_get_shared(int index) | |
1275 | { | |
1276 | struct vpe *v; | |
1277 | ||
2600990e | 1278 | if ((v = get_vpe(index)) == NULL) |
e01402b1 | 1279 | return NULL; |
e01402b1 RB |
1280 | |
1281 | return v->shared_ptr; | |
1282 | } | |
1283 | ||
1284 | EXPORT_SYMBOL(vpe_get_shared); | |
1285 | ||
2600990e RB |
1286 | int vpe_getuid(int index) |
1287 | { | |
1288 | struct vpe *v; | |
1289 | ||
1290 | if ((v = get_vpe(index)) == NULL) | |
1291 | return -1; | |
1292 | ||
1293 | return v->uid; | |
1294 | } | |
1295 | ||
1296 | EXPORT_SYMBOL(vpe_getuid); | |
1297 | ||
1298 | int vpe_getgid(int index) | |
1299 | { | |
1300 | struct vpe *v; | |
1301 | ||
1302 | if ((v = get_vpe(index)) == NULL) | |
1303 | return -1; | |
1304 | ||
1305 | return v->gid; | |
1306 | } | |
1307 | ||
1308 | EXPORT_SYMBOL(vpe_getgid); | |
1309 | ||
1310 | int vpe_notify(int index, struct vpe_notifications *notify) | |
1311 | { | |
1312 | struct vpe *v; | |
1313 | ||
1314 | if ((v = get_vpe(index)) == NULL) | |
1315 | return -1; | |
1316 | ||
1317 | list_add(¬ify->list, &v->notify); | |
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | EXPORT_SYMBOL(vpe_notify); | |
1322 | ||
1323 | char *vpe_getcwd(int index) | |
1324 | { | |
1325 | struct vpe *v; | |
1326 | ||
1327 | if ((v = get_vpe(index)) == NULL) | |
1328 | return NULL; | |
1329 | ||
1330 | return v->cwd; | |
1331 | } | |
1332 | ||
1333 | EXPORT_SYMBOL(vpe_getcwd); | |
1334 | ||
1335 | #ifdef CONFIG_MIPS_APSP_KSPD | |
1336 | static void kspd_sp_exit( int sp_id) | |
1337 | { | |
1338 | cleanup_tc(get_tc(sp_id)); | |
1339 | } | |
1340 | #endif | |
1341 | ||
736fad17 KS |
1342 | static ssize_t store_kill(struct device *dev, struct device_attribute *attr, |
1343 | const char *buf, size_t len) | |
0f5d0df3 RB |
1344 | { |
1345 | struct vpe *vpe = get_vpe(tclimit); | |
1346 | struct vpe_notifications *not; | |
1347 | ||
1348 | list_for_each_entry(not, &vpe->notify, list) { | |
1349 | not->stop(tclimit); | |
1350 | } | |
1351 | ||
1352 | release_progmem(vpe->load_addr); | |
1353 | cleanup_tc(get_tc(tclimit)); | |
1354 | vpe_stop(vpe); | |
1355 | vpe_free(vpe); | |
1356 | ||
1357 | return len; | |
1358 | } | |
1359 | ||
736fad17 KS |
1360 | static ssize_t show_ntcs(struct device *cd, struct device_attribute *attr, |
1361 | char *buf) | |
41790e04 RB |
1362 | { |
1363 | struct vpe *vpe = get_vpe(tclimit); | |
1364 | ||
1365 | return sprintf(buf, "%d\n", vpe->ntcs); | |
1366 | } | |
1367 | ||
736fad17 KS |
1368 | static ssize_t store_ntcs(struct device *dev, struct device_attribute *attr, |
1369 | const char *buf, size_t len) | |
41790e04 RB |
1370 | { |
1371 | struct vpe *vpe = get_vpe(tclimit); | |
1372 | unsigned long new; | |
1373 | char *endp; | |
1374 | ||
1375 | new = simple_strtoul(buf, &endp, 0); | |
1376 | if (endp == buf) | |
1377 | goto out_einval; | |
1378 | ||
1379 | if (new == 0 || new > (hw_tcs - tclimit)) | |
1380 | goto out_einval; | |
1381 | ||
1382 | vpe->ntcs = new; | |
1383 | ||
1384 | return len; | |
1385 | ||
1386 | out_einval: | |
52a7a27c | 1387 | return -EINVAL; |
41790e04 RB |
1388 | } |
1389 | ||
736fad17 | 1390 | static struct device_attribute vpe_class_attributes[] = { |
0f5d0df3 | 1391 | __ATTR(kill, S_IWUSR, NULL, store_kill), |
41790e04 RB |
1392 | __ATTR(ntcs, S_IRUGO | S_IWUSR, show_ntcs, store_ntcs), |
1393 | {} | |
1394 | }; | |
1395 | ||
736fad17 | 1396 | static void vpe_device_release(struct device *cd) |
41790e04 RB |
1397 | { |
1398 | kfree(cd); | |
1399 | } | |
1400 | ||
1401 | struct class vpe_class = { | |
1402 | .name = "vpe", | |
1403 | .owner = THIS_MODULE, | |
736fad17 KS |
1404 | .dev_release = vpe_device_release, |
1405 | .dev_attrs = vpe_class_attributes, | |
41790e04 RB |
1406 | }; |
1407 | ||
736fad17 | 1408 | struct device vpe_device; |
27a3bbaf | 1409 | |
e01402b1 RB |
1410 | static int __init vpe_module_init(void) |
1411 | { | |
07cc0c9e | 1412 | unsigned int mtflags, vpflags; |
07cc0c9e | 1413 | unsigned long flags, val; |
e01402b1 RB |
1414 | struct vpe *v = NULL; |
1415 | struct tc *t; | |
41790e04 | 1416 | int tc, err; |
e01402b1 RB |
1417 | |
1418 | if (!cpu_has_mipsmt) { | |
1419 | printk("VPE loader: not a MIPS MT capable processor\n"); | |
1420 | return -ENODEV; | |
1421 | } | |
1422 | ||
07cc0c9e RB |
1423 | if (vpelimit == 0) { |
1424 | printk(KERN_WARNING "No VPEs reserved for AP/SP, not " | |
1425 | "initializing VPE loader.\nPass maxvpes=<n> argument as " | |
1426 | "kernel argument\n"); | |
1427 | ||
1428 | return -ENODEV; | |
1429 | } | |
1430 | ||
1431 | if (tclimit == 0) { | |
1432 | printk(KERN_WARNING "No TCs reserved for AP/SP, not " | |
1433 | "initializing VPE loader.\nPass maxtcs=<n> argument as " | |
1434 | "kernel argument\n"); | |
1435 | ||
1436 | return -ENODEV; | |
1437 | } | |
1438 | ||
682e852e AD |
1439 | major = register_chrdev(0, module_name, &vpe_fops); |
1440 | if (major < 0) { | |
e01402b1 | 1441 | printk("VPE loader: unable to register character device\n"); |
307bd284 | 1442 | return major; |
e01402b1 RB |
1443 | } |
1444 | ||
41790e04 RB |
1445 | err = class_register(&vpe_class); |
1446 | if (err) { | |
1447 | printk(KERN_ERR "vpe_class registration failed\n"); | |
27a3bbaf RB |
1448 | goto out_chrdev; |
1449 | } | |
41790e04 | 1450 | |
736fad17 | 1451 | device_initialize(&vpe_device); |
41790e04 RB |
1452 | vpe_device.class = &vpe_class, |
1453 | vpe_device.parent = NULL, | |
1bb5beb4 | 1454 | dev_set_name(&vpe_device, "vpe1"); |
41790e04 | 1455 | vpe_device.devt = MKDEV(major, minor); |
736fad17 | 1456 | err = device_add(&vpe_device); |
41790e04 RB |
1457 | if (err) { |
1458 | printk(KERN_ERR "Adding vpe_device failed\n"); | |
1459 | goto out_class; | |
1460 | } | |
27a3bbaf | 1461 | |
07cc0c9e RB |
1462 | local_irq_save(flags); |
1463 | mtflags = dmt(); | |
1464 | vpflags = dvpe(); | |
e01402b1 RB |
1465 | |
1466 | /* Put MVPE's into 'configuration state' */ | |
340ee4b9 | 1467 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1468 | |
1469 | /* dump_mtregs(); */ | |
1470 | ||
e01402b1 | 1471 | val = read_c0_mvpconf0(); |
07cc0c9e RB |
1472 | hw_tcs = (val & MVPCONF0_PTC) + 1; |
1473 | hw_vpes = ((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1; | |
1474 | ||
1475 | for (tc = tclimit; tc < hw_tcs; tc++) { | |
1476 | /* | |
1477 | * Must re-enable multithreading temporarily or in case we | |
1478 | * reschedule send IPIs or similar we might hang. | |
1479 | */ | |
1480 | clear_c0_mvpcontrol(MVPCONTROL_VPC); | |
1481 | evpe(vpflags); | |
1482 | emt(mtflags); | |
1483 | local_irq_restore(flags); | |
1484 | t = alloc_tc(tc); | |
1485 | if (!t) { | |
1486 | err = -ENOMEM; | |
1487 | goto out; | |
1488 | } | |
1489 | ||
1490 | local_irq_save(flags); | |
1491 | mtflags = dmt(); | |
1492 | vpflags = dvpe(); | |
1493 | set_c0_mvpcontrol(MVPCONTROL_VPC); | |
e01402b1 RB |
1494 | |
1495 | /* VPE's */ | |
07cc0c9e RB |
1496 | if (tc < hw_tcs) { |
1497 | settc(tc); | |
e01402b1 | 1498 | |
07cc0c9e | 1499 | if ((v = alloc_vpe(tc)) == NULL) { |
e01402b1 | 1500 | printk(KERN_WARNING "VPE: unable to allocate VPE\n"); |
07cc0c9e RB |
1501 | |
1502 | goto out_reenable; | |
e01402b1 RB |
1503 | } |
1504 | ||
41790e04 RB |
1505 | v->ntcs = hw_tcs - tclimit; |
1506 | ||
2600990e RB |
1507 | /* add the tc to the list of this vpe's tc's. */ |
1508 | list_add(&t->tc, &v->tc); | |
e01402b1 RB |
1509 | |
1510 | /* deactivate all but vpe0 */ | |
07cc0c9e | 1511 | if (tc >= tclimit) { |
e01402b1 RB |
1512 | unsigned long tmp = read_vpe_c0_vpeconf0(); |
1513 | ||
1514 | tmp &= ~VPECONF0_VPA; | |
1515 | ||
1516 | /* master VPE */ | |
1517 | tmp |= VPECONF0_MVP; | |
1518 | write_vpe_c0_vpeconf0(tmp); | |
1519 | } | |
1520 | ||
1521 | /* disable multi-threading with TC's */ | |
1522 | write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() & ~VPECONTROL_TE); | |
1523 | ||
07cc0c9e | 1524 | if (tc >= vpelimit) { |
2600990e RB |
1525 | /* |
1526 | * Set config to be the same as vpe0, | |
1527 | * particularly kseg0 coherency alg | |
1528 | */ | |
e01402b1 RB |
1529 | write_vpe_c0_config(read_c0_config()); |
1530 | } | |
e01402b1 RB |
1531 | } |
1532 | ||
1533 | /* TC's */ | |
1534 | t->pvpe = v; /* set the parent vpe */ | |
1535 | ||
07cc0c9e | 1536 | if (tc >= tclimit) { |
e01402b1 RB |
1537 | unsigned long tmp; |
1538 | ||
07cc0c9e | 1539 | settc(tc); |
e01402b1 | 1540 | |
2600990e RB |
1541 | /* Any TC that is bound to VPE0 gets left as is - in case |
1542 | we are running SMTC on VPE0. A TC that is bound to any | |
1543 | other VPE gets bound to VPE0, ideally I'd like to make | |
1544 | it homeless but it doesn't appear to let me bind a TC | |
1545 | to a non-existent VPE. Which is perfectly reasonable. | |
1546 | ||
1547 | The (un)bound state is visible to an EJTAG probe so may | |
1548 | notify GDB... | |
1549 | */ | |
1550 | ||
1551 | if (((tmp = read_tc_c0_tcbind()) & TCBIND_CURVPE)) { | |
1552 | /* tc is bound >vpe0 */ | |
1553 | write_tc_c0_tcbind(tmp & ~TCBIND_CURVPE); | |
1554 | ||
1555 | t->pvpe = get_vpe(0); /* set the parent vpe */ | |
1556 | } | |
e01402b1 | 1557 | |
7c3a622d NS |
1558 | /* halt the TC */ |
1559 | write_tc_c0_tchalt(TCHALT_H); | |
1560 | mips_ihb(); | |
1561 | ||
e01402b1 RB |
1562 | tmp = read_tc_c0_tcstatus(); |
1563 | ||
2600990e | 1564 | /* mark not activated and not dynamically allocatable */ |
e01402b1 RB |
1565 | tmp &= ~(TCSTATUS_A | TCSTATUS_DA); |
1566 | tmp |= TCSTATUS_IXMT; /* interrupt exempt */ | |
1567 | write_tc_c0_tcstatus(tmp); | |
e01402b1 RB |
1568 | } |
1569 | } | |
1570 | ||
07cc0c9e | 1571 | out_reenable: |
e01402b1 | 1572 | /* release config state */ |
340ee4b9 | 1573 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 1574 | |
07cc0c9e RB |
1575 | evpe(vpflags); |
1576 | emt(mtflags); | |
1577 | local_irq_restore(flags); | |
1578 | ||
2600990e RB |
1579 | #ifdef CONFIG_MIPS_APSP_KSPD |
1580 | kspd_events.kspd_sp_exit = kspd_sp_exit; | |
1581 | #endif | |
e01402b1 | 1582 | return 0; |
27a3bbaf | 1583 | |
41790e04 RB |
1584 | out_class: |
1585 | class_unregister(&vpe_class); | |
27a3bbaf RB |
1586 | out_chrdev: |
1587 | unregister_chrdev(major, module_name); | |
1588 | ||
07cc0c9e | 1589 | out: |
27a3bbaf | 1590 | return err; |
e01402b1 RB |
1591 | } |
1592 | ||
1593 | static void __exit vpe_module_exit(void) | |
1594 | { | |
1595 | struct vpe *v, *n; | |
1596 | ||
1597 | list_for_each_entry_safe(v, n, &vpecontrol.vpe_list, list) { | |
1598 | if (v->state != VPE_STATE_UNUSED) { | |
1599 | release_vpe(v); | |
1600 | } | |
1601 | } | |
1602 | ||
736fad17 | 1603 | device_del(&vpe_device); |
e01402b1 RB |
1604 | unregister_chrdev(major, module_name); |
1605 | } | |
1606 | ||
1607 | module_init(vpe_module_init); | |
1608 | module_exit(vpe_module_exit); | |
1609 | MODULE_DESCRIPTION("MIPS VPE Loader"); | |
2600990e | 1610 | MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc."); |
e01402b1 | 1611 | MODULE_LICENSE("GPL"); |