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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; | |
465 | ||
466 | /* Sign extend the addend we extract from the lo insn. */ | |
467 | vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000; | |
468 | ||
469 | if (mips_hi16_list != NULL) { | |
470 | struct mips_hi16 *l; | |
471 | ||
472 | l = mips_hi16_list; | |
473 | while (l != NULL) { | |
474 | struct mips_hi16 *next; | |
475 | unsigned long insn; | |
476 | ||
477 | /* | |
478 | * The value for the HI16 had best be the same. | |
479 | */ | |
2600990e RB |
480 | if (v != l->value) { |
481 | printk(KERN_DEBUG "VPE loader: " | |
b1e3afa0 | 482 | "apply_r_mips_lo16/hi16: \t" |
2600990e RB |
483 | "inconsistent value information\n"); |
484 | return -ENOEXEC; | |
e01402b1 RB |
485 | } |
486 | ||
e01402b1 RB |
487 | /* |
488 | * Do the HI16 relocation. Note that we actually don't | |
489 | * need to know anything about the LO16 itself, except | |
490 | * where to find the low 16 bits of the addend needed | |
491 | * by the LO16. | |
492 | */ | |
493 | insn = *l->addr; | |
494 | val = ((insn & 0xffff) << 16) + vallo; | |
495 | val += v; | |
496 | ||
497 | /* | |
498 | * Account for the sign extension that will happen in | |
499 | * the low bits. | |
500 | */ | |
501 | val = ((val >> 16) + ((val & 0x8000) != 0)) & 0xffff; | |
502 | ||
503 | insn = (insn & ~0xffff) | val; | |
504 | *l->addr = insn; | |
505 | ||
506 | next = l->next; | |
507 | kfree(l); | |
508 | l = next; | |
509 | } | |
510 | ||
511 | mips_hi16_list = NULL; | |
512 | } | |
513 | ||
514 | /* | |
515 | * Ok, we're done with the HI16 relocs. Now deal with the LO16. | |
516 | */ | |
517 | val = v + vallo; | |
518 | insnlo = (insnlo & ~0xffff) | (val & 0xffff); | |
519 | *location = insnlo; | |
520 | ||
521 | return 0; | |
e01402b1 RB |
522 | } |
523 | ||
524 | static int (*reloc_handlers[]) (struct module *me, uint32_t *location, | |
525 | Elf32_Addr v) = { | |
526 | [R_MIPS_NONE] = apply_r_mips_none, | |
527 | [R_MIPS_32] = apply_r_mips_32, | |
528 | [R_MIPS_26] = apply_r_mips_26, | |
529 | [R_MIPS_HI16] = apply_r_mips_hi16, | |
530 | [R_MIPS_LO16] = apply_r_mips_lo16, | |
531 | [R_MIPS_GPREL16] = apply_r_mips_gprel16, | |
532 | [R_MIPS_PC16] = apply_r_mips_pc16 | |
533 | }; | |
534 | ||
2600990e | 535 | static char *rstrs[] = { |
e0daad44 | 536 | [R_MIPS_NONE] = "MIPS_NONE", |
2600990e RB |
537 | [R_MIPS_32] = "MIPS_32", |
538 | [R_MIPS_26] = "MIPS_26", | |
539 | [R_MIPS_HI16] = "MIPS_HI16", | |
540 | [R_MIPS_LO16] = "MIPS_LO16", | |
541 | [R_MIPS_GPREL16] = "MIPS_GPREL16", | |
542 | [R_MIPS_PC16] = "MIPS_PC16" | |
543 | }; | |
e01402b1 RB |
544 | |
545 | int apply_relocations(Elf32_Shdr *sechdrs, | |
546 | const char *strtab, | |
547 | unsigned int symindex, | |
548 | unsigned int relsec, | |
549 | struct module *me) | |
550 | { | |
551 | Elf32_Rel *rel = (void *) sechdrs[relsec].sh_addr; | |
552 | Elf32_Sym *sym; | |
553 | uint32_t *location; | |
554 | unsigned int i; | |
555 | Elf32_Addr v; | |
556 | int res; | |
557 | ||
558 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { | |
559 | Elf32_Word r_info = rel[i].r_info; | |
560 | ||
561 | /* This is where to make the change */ | |
562 | location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr | |
563 | + rel[i].r_offset; | |
564 | /* This is the symbol it is referring to */ | |
565 | sym = (Elf32_Sym *)sechdrs[symindex].sh_addr | |
566 | + ELF32_R_SYM(r_info); | |
567 | ||
568 | if (!sym->st_value) { | |
569 | printk(KERN_DEBUG "%s: undefined weak symbol %s\n", | |
570 | me->name, strtab + sym->st_name); | |
571 | /* just print the warning, dont barf */ | |
572 | } | |
573 | ||
574 | v = sym->st_value; | |
575 | ||
576 | res = reloc_handlers[ELF32_R_TYPE(r_info)](me, location, v); | |
577 | if( res ) { | |
2600990e RB |
578 | char *r = rstrs[ELF32_R_TYPE(r_info)]; |
579 | printk(KERN_WARNING "VPE loader: .text+0x%x " | |
580 | "relocation type %s for symbol \"%s\" failed\n", | |
581 | rel[i].r_offset, r ? r : "UNKNOWN", | |
582 | strtab + sym->st_name); | |
e01402b1 | 583 | return res; |
2600990e | 584 | } |
e01402b1 RB |
585 | } |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
590 | void save_gp_address(unsigned int secbase, unsigned int rel) | |
591 | { | |
592 | gp_addr = secbase + rel; | |
593 | gp_offs = gp_addr - (secbase & 0xffff0000); | |
594 | } | |
595 | /* end module-elf32.c */ | |
596 | ||
597 | ||
598 | ||
599 | /* Change all symbols so that sh_value encodes the pointer directly. */ | |
2600990e | 600 | static void simplify_symbols(Elf_Shdr * sechdrs, |
e01402b1 RB |
601 | unsigned int symindex, |
602 | const char *strtab, | |
603 | const char *secstrings, | |
604 | unsigned int nsecs, struct module *mod) | |
605 | { | |
606 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
607 | unsigned long secbase, bssbase = 0; | |
608 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
2600990e | 609 | int size; |
e01402b1 RB |
610 | |
611 | /* find the .bss section for COMMON symbols */ | |
612 | for (i = 0; i < nsecs; i++) { | |
2600990e | 613 | if (strncmp(secstrings + sechdrs[i].sh_name, ".bss", 4) == 0) { |
e01402b1 | 614 | bssbase = sechdrs[i].sh_addr; |
2600990e RB |
615 | break; |
616 | } | |
e01402b1 RB |
617 | } |
618 | ||
619 | for (i = 1; i < n; i++) { | |
620 | switch (sym[i].st_shndx) { | |
621 | case SHN_COMMON: | |
2600990e RB |
622 | /* Allocate space for the symbol in the .bss section. |
623 | st_value is currently size. | |
e01402b1 RB |
624 | We want it to have the address of the symbol. */ |
625 | ||
626 | size = sym[i].st_value; | |
627 | sym[i].st_value = bssbase; | |
628 | ||
629 | bssbase += size; | |
630 | break; | |
631 | ||
632 | case SHN_ABS: | |
633 | /* Don't need to do anything */ | |
634 | break; | |
635 | ||
636 | case SHN_UNDEF: | |
637 | /* ret = -ENOENT; */ | |
638 | break; | |
639 | ||
640 | case SHN_MIPS_SCOMMON: | |
b1e3afa0 | 641 | printk(KERN_DEBUG "simplify_symbols: ignoring SHN_MIPS_SCOMMON " |
2600990e RB |
642 | "symbol <%s> st_shndx %d\n", strtab + sym[i].st_name, |
643 | sym[i].st_shndx); | |
e01402b1 RB |
644 | // .sbss section |
645 | break; | |
646 | ||
647 | default: | |
648 | secbase = sechdrs[sym[i].st_shndx].sh_addr; | |
649 | ||
650 | if (strncmp(strtab + sym[i].st_name, "_gp", 3) == 0) { | |
651 | save_gp_address(secbase, sym[i].st_value); | |
652 | } | |
653 | ||
654 | sym[i].st_value += secbase; | |
655 | break; | |
656 | } | |
e01402b1 | 657 | } |
e01402b1 RB |
658 | } |
659 | ||
660 | #ifdef DEBUG_ELFLOADER | |
661 | static void dump_elfsymbols(Elf_Shdr * sechdrs, unsigned int symindex, | |
662 | const char *strtab, struct module *mod) | |
663 | { | |
664 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
665 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
666 | ||
667 | printk(KERN_DEBUG "dump_elfsymbols: n %d\n", n); | |
668 | for (i = 1; i < n; i++) { | |
669 | printk(KERN_DEBUG " i %d name <%s> 0x%x\n", i, | |
670 | strtab + sym[i].st_name, sym[i].st_value); | |
671 | } | |
672 | } | |
673 | #endif | |
674 | ||
e01402b1 | 675 | /* We are prepared so configure and start the VPE... */ |
be6e1437 | 676 | static int vpe_run(struct vpe * v) |
e01402b1 | 677 | { |
07cc0c9e | 678 | unsigned long flags, val, dmt_flag; |
2600990e | 679 | struct vpe_notifications *n; |
07cc0c9e | 680 | unsigned int vpeflags; |
e01402b1 RB |
681 | struct tc *t; |
682 | ||
683 | /* check we are the Master VPE */ | |
07cc0c9e | 684 | local_irq_save(flags); |
e01402b1 RB |
685 | val = read_c0_vpeconf0(); |
686 | if (!(val & VPECONF0_MVP)) { | |
687 | printk(KERN_WARNING | |
2600990e | 688 | "VPE loader: only Master VPE's are allowed to configure MT\n"); |
07cc0c9e RB |
689 | local_irq_restore(flags); |
690 | ||
e01402b1 RB |
691 | return -1; |
692 | } | |
693 | ||
07cc0c9e RB |
694 | dmt_flag = dmt(); |
695 | vpeflags = dvpe(); | |
e01402b1 | 696 | |
2600990e | 697 | if (!list_empty(&v->tc)) { |
e0daad44 | 698 | if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { |
07cc0c9e RB |
699 | evpe(vpeflags); |
700 | emt(dmt_flag); | |
701 | local_irq_restore(flags); | |
702 | ||
703 | printk(KERN_WARNING | |
704 | "VPE loader: TC %d is already in use.\n", | |
705 | t->index); | |
e0daad44 RB |
706 | return -ENOEXEC; |
707 | } | |
708 | } else { | |
07cc0c9e RB |
709 | evpe(vpeflags); |
710 | emt(dmt_flag); | |
711 | local_irq_restore(flags); | |
712 | ||
713 | printk(KERN_WARNING | |
714 | "VPE loader: No TC's associated with VPE %d\n", | |
e0daad44 | 715 | v->minor); |
07cc0c9e | 716 | |
e0daad44 RB |
717 | return -ENOEXEC; |
718 | } | |
2600990e | 719 | |
e01402b1 | 720 | /* Put MVPE's into 'configuration state' */ |
340ee4b9 | 721 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 722 | |
e01402b1 RB |
723 | settc(t->index); |
724 | ||
e01402b1 RB |
725 | /* should check it is halted, and not activated */ |
726 | if ((read_tc_c0_tcstatus() & TCSTATUS_A) || !(read_tc_c0_tchalt() & TCHALT_H)) { | |
07cc0c9e RB |
727 | evpe(vpeflags); |
728 | emt(dmt_flag); | |
729 | local_irq_restore(flags); | |
730 | ||
731 | printk(KERN_WARNING "VPE loader: TC %d is already active!\n", | |
e01402b1 | 732 | t->index); |
07cc0c9e | 733 | |
e01402b1 RB |
734 | return -ENOEXEC; |
735 | } | |
736 | ||
737 | /* Write the address we want it to start running from in the TCPC register. */ | |
738 | write_tc_c0_tcrestart((unsigned long)v->__start); | |
e01402b1 | 739 | write_tc_c0_tccontext((unsigned long)0); |
07cc0c9e | 740 | |
2600990e RB |
741 | /* |
742 | * Mark the TC as activated, not interrupt exempt and not dynamically | |
743 | * allocatable | |
744 | */ | |
e01402b1 RB |
745 | val = read_tc_c0_tcstatus(); |
746 | val = (val & ~(TCSTATUS_DA | TCSTATUS_IXMT)) | TCSTATUS_A; | |
747 | write_tc_c0_tcstatus(val); | |
748 | ||
749 | write_tc_c0_tchalt(read_tc_c0_tchalt() & ~TCHALT_H); | |
750 | ||
e01402b1 RB |
751 | /* |
752 | * The sde-kit passes 'memsize' to __start in $a3, so set something | |
2600990e | 753 | * here... Or set $a3 to zero and define DFLT_STACK_SIZE and |
e01402b1 RB |
754 | * DFLT_HEAP_SIZE when you compile your program |
755 | */ | |
41790e04 | 756 | mttgpr(6, v->ntcs); |
07cc0c9e | 757 | mttgpr(7, physical_memsize); |
2600990e RB |
758 | |
759 | /* set up VPE1 */ | |
760 | /* | |
761 | * bind the TC to VPE 1 as late as possible so we only have the final | |
762 | * VPE registers to set up, and so an EJTAG probe can trigger on it | |
763 | */ | |
07cc0c9e | 764 | write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | 1); |
e01402b1 | 765 | |
a94d7020 EO |
766 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~(VPECONF0_VPA)); |
767 | ||
768 | back_to_back_c0_hazard(); | |
769 | ||
e0daad44 RB |
770 | /* Set up the XTC bit in vpeconf0 to point at our tc */ |
771 | write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC)) | |
772 | | (t->index << VPECONF0_XTC_SHIFT)); | |
e01402b1 | 773 | |
a94d7020 EO |
774 | back_to_back_c0_hazard(); |
775 | ||
e0daad44 RB |
776 | /* enable this VPE */ |
777 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); | |
e01402b1 RB |
778 | |
779 | /* clear out any left overs from a previous program */ | |
2600990e | 780 | write_vpe_c0_status(0); |
e01402b1 RB |
781 | write_vpe_c0_cause(0); |
782 | ||
783 | /* take system out of configuration state */ | |
340ee4b9 | 784 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 785 | |
b618336a KK |
786 | /* |
787 | * SMTC/SMVP kernels manage VPE enable independently, | |
788 | * but uniprocessor kernels need to turn it on, even | |
789 | * if that wasn't the pre-dvpe() state. | |
790 | */ | |
07cc0c9e | 791 | #ifdef CONFIG_SMP |
07cc0c9e | 792 | evpe(vpeflags); |
b618336a KK |
793 | #else |
794 | evpe(EVPE_ENABLE); | |
07cc0c9e RB |
795 | #endif |
796 | emt(dmt_flag); | |
797 | local_irq_restore(flags); | |
e01402b1 | 798 | |
07cc0c9e RB |
799 | list_for_each_entry(n, &v->notify, list) |
800 | n->start(minor); | |
2600990e | 801 | |
e01402b1 RB |
802 | return 0; |
803 | } | |
804 | ||
2600990e | 805 | static int find_vpe_symbols(struct vpe * v, Elf_Shdr * sechdrs, |
e01402b1 RB |
806 | unsigned int symindex, const char *strtab, |
807 | struct module *mod) | |
808 | { | |
809 | Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; | |
810 | unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); | |
811 | ||
812 | for (i = 1; i < n; i++) { | |
813 | if (strcmp(strtab + sym[i].st_name, "__start") == 0) { | |
814 | v->__start = sym[i].st_value; | |
815 | } | |
816 | ||
817 | if (strcmp(strtab + sym[i].st_name, "vpe_shared") == 0) { | |
818 | v->shared_ptr = (void *)sym[i].st_value; | |
819 | } | |
820 | } | |
821 | ||
2600990e RB |
822 | if ( (v->__start == 0) || (v->shared_ptr == NULL)) |
823 | return -1; | |
824 | ||
e01402b1 RB |
825 | return 0; |
826 | } | |
827 | ||
307bd284 | 828 | /* |
2600990e RB |
829 | * Allocates a VPE with some program code space(the load address), copies the |
830 | * contents of the program (p)buffer performing relocatations/etc, free's it | |
831 | * when finished. | |
832 | */ | |
be6e1437 | 833 | static int vpe_elfload(struct vpe * v) |
e01402b1 RB |
834 | { |
835 | Elf_Ehdr *hdr; | |
836 | Elf_Shdr *sechdrs; | |
837 | long err = 0; | |
838 | char *secstrings, *strtab = NULL; | |
2600990e | 839 | unsigned int len, i, symindex = 0, strindex = 0, relocate = 0; |
e01402b1 RB |
840 | struct module mod; // so we can re-use the relocations code |
841 | ||
842 | memset(&mod, 0, sizeof(struct module)); | |
2600990e | 843 | strcpy(mod.name, "VPE loader"); |
e01402b1 RB |
844 | |
845 | hdr = (Elf_Ehdr *) v->pbuffer; | |
846 | len = v->plen; | |
847 | ||
848 | /* Sanity checks against insmoding binaries or wrong arch, | |
849 | weird elf version */ | |
d303f4a1 | 850 | if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0 |
2600990e RB |
851 | || (hdr->e_type != ET_REL && hdr->e_type != ET_EXEC) |
852 | || !elf_check_arch(hdr) | |
e01402b1 RB |
853 | || hdr->e_shentsize != sizeof(*sechdrs)) { |
854 | printk(KERN_WARNING | |
2600990e | 855 | "VPE loader: program wrong arch or weird elf version\n"); |
e01402b1 RB |
856 | |
857 | return -ENOEXEC; | |
858 | } | |
859 | ||
2600990e RB |
860 | if (hdr->e_type == ET_REL) |
861 | relocate = 1; | |
862 | ||
e01402b1 | 863 | if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) { |
2600990e RB |
864 | printk(KERN_ERR "VPE loader: program length %u truncated\n", |
865 | len); | |
866 | ||
e01402b1 RB |
867 | return -ENOEXEC; |
868 | } | |
869 | ||
870 | /* Convenience variables */ | |
871 | sechdrs = (void *)hdr + hdr->e_shoff; | |
872 | secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; | |
873 | sechdrs[0].sh_addr = 0; | |
874 | ||
875 | /* And these should exist, but gcc whinges if we don't init them */ | |
876 | symindex = strindex = 0; | |
877 | ||
2600990e RB |
878 | if (relocate) { |
879 | for (i = 1; i < hdr->e_shnum; i++) { | |
880 | if (sechdrs[i].sh_type != SHT_NOBITS | |
881 | && len < sechdrs[i].sh_offset + sechdrs[i].sh_size) { | |
882 | printk(KERN_ERR "VPE program length %u truncated\n", | |
883 | len); | |
884 | return -ENOEXEC; | |
885 | } | |
e01402b1 | 886 | |
2600990e RB |
887 | /* Mark all sections sh_addr with their address in the |
888 | temporary image. */ | |
889 | sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; | |
e01402b1 | 890 | |
2600990e RB |
891 | /* Internal symbols and strings. */ |
892 | if (sechdrs[i].sh_type == SHT_SYMTAB) { | |
893 | symindex = i; | |
894 | strindex = sechdrs[i].sh_link; | |
895 | strtab = (char *)hdr + sechdrs[strindex].sh_offset; | |
896 | } | |
e01402b1 | 897 | } |
2600990e | 898 | layout_sections(&mod, hdr, sechdrs, secstrings); |
e01402b1 RB |
899 | } |
900 | ||
e01402b1 | 901 | v->load_addr = alloc_progmem(mod.core_size); |
5408c490 RB |
902 | if (!v->load_addr) |
903 | return -ENOMEM; | |
e01402b1 | 904 | |
5408c490 | 905 | pr_info("VPE loader: loading to %p\n", v->load_addr); |
e01402b1 | 906 | |
2600990e RB |
907 | if (relocate) { |
908 | for (i = 0; i < hdr->e_shnum; i++) { | |
909 | void *dest; | |
e01402b1 | 910 | |
2600990e RB |
911 | if (!(sechdrs[i].sh_flags & SHF_ALLOC)) |
912 | continue; | |
e01402b1 | 913 | |
2600990e | 914 | dest = v->load_addr + sechdrs[i].sh_entsize; |
e01402b1 | 915 | |
2600990e RB |
916 | if (sechdrs[i].sh_type != SHT_NOBITS) |
917 | memcpy(dest, (void *)sechdrs[i].sh_addr, | |
918 | sechdrs[i].sh_size); | |
919 | /* Update sh_addr to point to copy in image. */ | |
920 | sechdrs[i].sh_addr = (unsigned long)dest; | |
e01402b1 | 921 | |
2600990e RB |
922 | printk(KERN_DEBUG " section sh_name %s sh_addr 0x%x\n", |
923 | secstrings + sechdrs[i].sh_name, sechdrs[i].sh_addr); | |
924 | } | |
e01402b1 | 925 | |
2600990e RB |
926 | /* Fix up syms, so that st_value is a pointer to location. */ |
927 | simplify_symbols(sechdrs, symindex, strtab, secstrings, | |
928 | hdr->e_shnum, &mod); | |
929 | ||
930 | /* Now do relocations. */ | |
931 | for (i = 1; i < hdr->e_shnum; i++) { | |
932 | const char *strtab = (char *)sechdrs[strindex].sh_addr; | |
933 | unsigned int info = sechdrs[i].sh_info; | |
934 | ||
935 | /* Not a valid relocation section? */ | |
936 | if (info >= hdr->e_shnum) | |
937 | continue; | |
938 | ||
939 | /* Don't bother with non-allocated sections */ | |
940 | if (!(sechdrs[info].sh_flags & SHF_ALLOC)) | |
941 | continue; | |
942 | ||
943 | if (sechdrs[i].sh_type == SHT_REL) | |
944 | err = apply_relocations(sechdrs, strtab, symindex, i, | |
945 | &mod); | |
946 | else if (sechdrs[i].sh_type == SHT_RELA) | |
947 | err = apply_relocate_add(sechdrs, strtab, symindex, i, | |
948 | &mod); | |
949 | if (err < 0) | |
950 | return err; | |
951 | ||
952 | } | |
953 | } else { | |
bdf5d42c | 954 | struct elf_phdr *phdr = (struct elf_phdr *) ((char *)hdr + hdr->e_phoff); |
2600990e | 955 | |
bdf5d42c | 956 | for (i = 0; i < hdr->e_phnum; i++) { |
b618336a KK |
957 | if (phdr->p_type == PT_LOAD) { |
958 | memcpy((void *)phdr->p_paddr, | |
959 | (char *)hdr + phdr->p_offset, | |
960 | phdr->p_filesz); | |
961 | memset((void *)phdr->p_paddr + phdr->p_filesz, | |
962 | 0, phdr->p_memsz - phdr->p_filesz); | |
963 | } | |
964 | phdr++; | |
bdf5d42c RB |
965 | } |
966 | ||
967 | for (i = 0; i < hdr->e_shnum; i++) { | |
2600990e RB |
968 | /* Internal symbols and strings. */ |
969 | if (sechdrs[i].sh_type == SHT_SYMTAB) { | |
970 | symindex = i; | |
971 | strindex = sechdrs[i].sh_link; | |
972 | strtab = (char *)hdr + sechdrs[strindex].sh_offset; | |
973 | ||
974 | /* mark the symtab's address for when we try to find the | |
975 | magic symbols */ | |
976 | sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset; | |
977 | } | |
e01402b1 RB |
978 | } |
979 | } | |
980 | ||
981 | /* make sure it's physically written out */ | |
982 | flush_icache_range((unsigned long)v->load_addr, | |
983 | (unsigned long)v->load_addr + v->len); | |
984 | ||
985 | if ((find_vpe_symbols(v, sechdrs, symindex, strtab, &mod)) < 0) { | |
2600990e RB |
986 | if (v->__start == 0) { |
987 | printk(KERN_WARNING "VPE loader: program does not contain " | |
988 | "a __start symbol\n"); | |
989 | return -ENOEXEC; | |
990 | } | |
e01402b1 | 991 | |
2600990e RB |
992 | if (v->shared_ptr == NULL) |
993 | printk(KERN_WARNING "VPE loader: " | |
994 | "program does not contain vpe_shared symbol.\n" | |
995 | " Unable to use AMVP (AP/SP) facilities.\n"); | |
e01402b1 RB |
996 | } |
997 | ||
998 | printk(" elf loaded\n"); | |
2600990e | 999 | return 0; |
e01402b1 RB |
1000 | } |
1001 | ||
2600990e RB |
1002 | static void cleanup_tc(struct tc *tc) |
1003 | { | |
07cc0c9e RB |
1004 | unsigned long flags; |
1005 | unsigned int mtflags, vpflags; | |
2600990e RB |
1006 | int tmp; |
1007 | ||
07cc0c9e RB |
1008 | local_irq_save(flags); |
1009 | mtflags = dmt(); | |
1010 | vpflags = dvpe(); | |
2600990e RB |
1011 | /* Put MVPE's into 'configuration state' */ |
1012 | set_c0_mvpcontrol(MVPCONTROL_VPC); | |
1013 | ||
1014 | settc(tc->index); | |
1015 | tmp = read_tc_c0_tcstatus(); | |
1016 | ||
1017 | /* mark not allocated and not dynamically allocatable */ | |
1018 | tmp &= ~(TCSTATUS_A | TCSTATUS_DA); | |
1019 | tmp |= TCSTATUS_IXMT; /* interrupt exempt */ | |
1020 | write_tc_c0_tcstatus(tmp); | |
1021 | ||
1022 | write_tc_c0_tchalt(TCHALT_H); | |
7c3a622d | 1023 | mips_ihb(); |
2600990e RB |
1024 | |
1025 | /* bind it to anything other than VPE1 */ | |
07cc0c9e | 1026 | // write_tc_c0_tcbind(read_tc_c0_tcbind() & ~TCBIND_CURVPE); // | TCBIND_CURVPE |
2600990e RB |
1027 | |
1028 | clear_c0_mvpcontrol(MVPCONTROL_VPC); | |
07cc0c9e RB |
1029 | evpe(vpflags); |
1030 | emt(mtflags); | |
1031 | local_irq_restore(flags); | |
2600990e RB |
1032 | } |
1033 | ||
1034 | static int getcwd(char *buff, int size) | |
1035 | { | |
1036 | mm_segment_t old_fs; | |
1037 | int ret; | |
1038 | ||
1039 | old_fs = get_fs(); | |
1040 | set_fs(KERNEL_DS); | |
1041 | ||
21a151d8 | 1042 | ret = sys_getcwd(buff, size); |
2600990e RB |
1043 | |
1044 | set_fs(old_fs); | |
1045 | ||
1046 | return ret; | |
1047 | } | |
1048 | ||
1049 | /* checks VPE is unused and gets ready to load program */ | |
e01402b1 RB |
1050 | static int vpe_open(struct inode *inode, struct file *filp) |
1051 | { | |
c4c4018b | 1052 | enum vpe_state state; |
2600990e | 1053 | struct vpe_notifications *not; |
07cc0c9e | 1054 | struct vpe *v; |
7558da94 | 1055 | int ret, err = 0; |
e01402b1 | 1056 | |
7558da94 | 1057 | lock_kernel(); |
07cc0c9e RB |
1058 | if (minor != iminor(inode)) { |
1059 | /* assume only 1 device at the moment. */ | |
2600990e | 1060 | printk(KERN_WARNING "VPE loader: only vpe1 is supported\n"); |
7558da94 JC |
1061 | err = -ENODEV; |
1062 | goto out; | |
e01402b1 RB |
1063 | } |
1064 | ||
07cc0c9e | 1065 | if ((v = get_vpe(tclimit)) == NULL) { |
2600990e | 1066 | printk(KERN_WARNING "VPE loader: unable to get vpe\n"); |
7558da94 JC |
1067 | err = -ENODEV; |
1068 | goto out; | |
e01402b1 RB |
1069 | } |
1070 | ||
c4c4018b RB |
1071 | state = xchg(&v->state, VPE_STATE_INUSE); |
1072 | if (state != VPE_STATE_UNUSED) { | |
2600990e | 1073 | printk(KERN_DEBUG "VPE loader: tc in use dumping regs\n"); |
e01402b1 | 1074 | |
2600990e | 1075 | list_for_each_entry(not, &v->notify, list) { |
07cc0c9e | 1076 | not->stop(tclimit); |
2600990e | 1077 | } |
e01402b1 | 1078 | |
2600990e | 1079 | release_progmem(v->load_addr); |
07cc0c9e | 1080 | cleanup_tc(get_tc(tclimit)); |
e01402b1 RB |
1081 | } |
1082 | ||
e01402b1 RB |
1083 | /* this of-course trashes what was there before... */ |
1084 | v->pbuffer = vmalloc(P_SIZE); | |
1085 | v->plen = P_SIZE; | |
1086 | v->load_addr = NULL; | |
1087 | v->len = 0; | |
1088 | ||
d76b0d9b DH |
1089 | v->uid = filp->f_cred->fsuid; |
1090 | v->gid = filp->f_cred->fsgid; | |
2600990e RB |
1091 | |
1092 | #ifdef CONFIG_MIPS_APSP_KSPD | |
1093 | /* get kspd to tell us when a syscall_exit happens */ | |
1094 | if (!kspd_events_reqd) { | |
1095 | kspd_notify(&kspd_events); | |
1096 | kspd_events_reqd++; | |
1097 | } | |
1098 | #endif | |
1099 | ||
1100 | v->cwd[0] = 0; | |
1101 | ret = getcwd(v->cwd, VPE_PATH_MAX); | |
1102 | if (ret < 0) | |
1103 | printk(KERN_WARNING "VPE loader: open, getcwd returned %d\n", ret); | |
1104 | ||
1105 | v->shared_ptr = NULL; | |
1106 | v->__start = 0; | |
07cc0c9e | 1107 | |
7558da94 JC |
1108 | out: |
1109 | unlock_kernel(); | |
e01402b1 RB |
1110 | return 0; |
1111 | } | |
1112 | ||
1113 | static int vpe_release(struct inode *inode, struct file *filp) | |
1114 | { | |
307bd284 | 1115 | struct vpe *v; |
e01402b1 | 1116 | Elf_Ehdr *hdr; |
07cc0c9e | 1117 | int ret = 0; |
e01402b1 | 1118 | |
07cc0c9e RB |
1119 | v = get_vpe(tclimit); |
1120 | if (v == NULL) | |
e01402b1 RB |
1121 | return -ENODEV; |
1122 | ||
e01402b1 | 1123 | hdr = (Elf_Ehdr *) v->pbuffer; |
d303f4a1 | 1124 | if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) == 0) { |
07cc0c9e | 1125 | if (vpe_elfload(v) >= 0) { |
e01402b1 | 1126 | vpe_run(v); |
07cc0c9e | 1127 | } else { |
2600990e | 1128 | printk(KERN_WARNING "VPE loader: ELF load failed.\n"); |
e01402b1 RB |
1129 | ret = -ENOEXEC; |
1130 | } | |
1131 | } else { | |
2600990e | 1132 | printk(KERN_WARNING "VPE loader: only elf files are supported\n"); |
e01402b1 RB |
1133 | ret = -ENOEXEC; |
1134 | } | |
1135 | ||
2600990e RB |
1136 | /* It's good to be able to run the SP and if it chokes have a look at |
1137 | the /dev/rt?. But if we reset the pointer to the shared struct we | |
8ebcfc8b | 1138 | lose what has happened. So perhaps if garbage is sent to the vpe |
2600990e RB |
1139 | device, use it as a trigger for the reset. Hopefully a nice |
1140 | executable will be along shortly. */ | |
1141 | if (ret < 0) | |
1142 | v->shared_ptr = NULL; | |
1143 | ||
e01402b1 RB |
1144 | // cleanup any temp buffers |
1145 | if (v->pbuffer) | |
1146 | vfree(v->pbuffer); | |
1147 | v->plen = 0; | |
1148 | return ret; | |
1149 | } | |
1150 | ||
1151 | static ssize_t vpe_write(struct file *file, const char __user * buffer, | |
1152 | size_t count, loff_t * ppos) | |
1153 | { | |
e01402b1 | 1154 | size_t ret = count; |
307bd284 | 1155 | struct vpe *v; |
e01402b1 | 1156 | |
07cc0c9e RB |
1157 | if (iminor(file->f_path.dentry->d_inode) != minor) |
1158 | return -ENODEV; | |
1159 | ||
1160 | v = get_vpe(tclimit); | |
1161 | if (v == NULL) | |
e01402b1 RB |
1162 | return -ENODEV; |
1163 | ||
1164 | if (v->pbuffer == NULL) { | |
2600990e | 1165 | printk(KERN_ERR "VPE loader: no buffer for program\n"); |
e01402b1 RB |
1166 | return -ENOMEM; |
1167 | } | |
1168 | ||
1169 | if ((count + v->len) > v->plen) { | |
1170 | printk(KERN_WARNING | |
2600990e | 1171 | "VPE loader: elf size too big. Perhaps strip uneeded symbols\n"); |
e01402b1 RB |
1172 | return -ENOMEM; |
1173 | } | |
1174 | ||
1175 | count -= copy_from_user(v->pbuffer + v->len, buffer, count); | |
2600990e | 1176 | if (!count) |
e01402b1 | 1177 | return -EFAULT; |
e01402b1 RB |
1178 | |
1179 | v->len += count; | |
1180 | return ret; | |
1181 | } | |
1182 | ||
5dfe4c96 | 1183 | static const struct file_operations vpe_fops = { |
e01402b1 RB |
1184 | .owner = THIS_MODULE, |
1185 | .open = vpe_open, | |
1186 | .release = vpe_release, | |
1187 | .write = vpe_write | |
1188 | }; | |
1189 | ||
1190 | /* module wrapper entry points */ | |
1191 | /* give me a vpe */ | |
1192 | vpe_handle vpe_alloc(void) | |
1193 | { | |
1194 | int i; | |
1195 | struct vpe *v; | |
1196 | ||
1197 | /* find a vpe */ | |
1198 | for (i = 1; i < MAX_VPES; i++) { | |
1199 | if ((v = get_vpe(i)) != NULL) { | |
1200 | v->state = VPE_STATE_INUSE; | |
1201 | return v; | |
1202 | } | |
1203 | } | |
1204 | return NULL; | |
1205 | } | |
1206 | ||
1207 | EXPORT_SYMBOL(vpe_alloc); | |
1208 | ||
1209 | /* start running from here */ | |
1210 | int vpe_start(vpe_handle vpe, unsigned long start) | |
1211 | { | |
1212 | struct vpe *v = vpe; | |
1213 | ||
1214 | v->__start = start; | |
1215 | return vpe_run(v); | |
1216 | } | |
1217 | ||
1218 | EXPORT_SYMBOL(vpe_start); | |
1219 | ||
1220 | /* halt it for now */ | |
1221 | int vpe_stop(vpe_handle vpe) | |
1222 | { | |
1223 | struct vpe *v = vpe; | |
1224 | struct tc *t; | |
1225 | unsigned int evpe_flags; | |
1226 | ||
1227 | evpe_flags = dvpe(); | |
1228 | ||
1229 | if ((t = list_entry(v->tc.next, struct tc, tc)) != NULL) { | |
1230 | ||
1231 | settc(t->index); | |
1232 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); | |
1233 | } | |
1234 | ||
1235 | evpe(evpe_flags); | |
1236 | ||
1237 | return 0; | |
1238 | } | |
1239 | ||
1240 | EXPORT_SYMBOL(vpe_stop); | |
1241 | ||
1242 | /* I've done with it thank you */ | |
1243 | int vpe_free(vpe_handle vpe) | |
1244 | { | |
1245 | struct vpe *v = vpe; | |
1246 | struct tc *t; | |
1247 | unsigned int evpe_flags; | |
1248 | ||
1249 | if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) { | |
1250 | return -ENOEXEC; | |
1251 | } | |
1252 | ||
1253 | evpe_flags = dvpe(); | |
1254 | ||
1255 | /* Put MVPE's into 'configuration state' */ | |
340ee4b9 | 1256 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1257 | |
1258 | settc(t->index); | |
1259 | write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA); | |
1260 | ||
7c3a622d | 1261 | /* halt the TC */ |
e01402b1 | 1262 | write_tc_c0_tchalt(TCHALT_H); |
7c3a622d NS |
1263 | mips_ihb(); |
1264 | ||
1265 | /* mark the TC unallocated */ | |
1266 | write_tc_c0_tcstatus(read_tc_c0_tcstatus() & ~TCSTATUS_A); | |
e01402b1 RB |
1267 | |
1268 | v->state = VPE_STATE_UNUSED; | |
1269 | ||
340ee4b9 | 1270 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1271 | evpe(evpe_flags); |
1272 | ||
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | EXPORT_SYMBOL(vpe_free); | |
1277 | ||
1278 | void *vpe_get_shared(int index) | |
1279 | { | |
1280 | struct vpe *v; | |
1281 | ||
2600990e | 1282 | if ((v = get_vpe(index)) == NULL) |
e01402b1 | 1283 | return NULL; |
e01402b1 RB |
1284 | |
1285 | return v->shared_ptr; | |
1286 | } | |
1287 | ||
1288 | EXPORT_SYMBOL(vpe_get_shared); | |
1289 | ||
2600990e RB |
1290 | int vpe_getuid(int index) |
1291 | { | |
1292 | struct vpe *v; | |
1293 | ||
1294 | if ((v = get_vpe(index)) == NULL) | |
1295 | return -1; | |
1296 | ||
1297 | return v->uid; | |
1298 | } | |
1299 | ||
1300 | EXPORT_SYMBOL(vpe_getuid); | |
1301 | ||
1302 | int vpe_getgid(int index) | |
1303 | { | |
1304 | struct vpe *v; | |
1305 | ||
1306 | if ((v = get_vpe(index)) == NULL) | |
1307 | return -1; | |
1308 | ||
1309 | return v->gid; | |
1310 | } | |
1311 | ||
1312 | EXPORT_SYMBOL(vpe_getgid); | |
1313 | ||
1314 | int vpe_notify(int index, struct vpe_notifications *notify) | |
1315 | { | |
1316 | struct vpe *v; | |
1317 | ||
1318 | if ((v = get_vpe(index)) == NULL) | |
1319 | return -1; | |
1320 | ||
1321 | list_add(¬ify->list, &v->notify); | |
1322 | return 0; | |
1323 | } | |
1324 | ||
1325 | EXPORT_SYMBOL(vpe_notify); | |
1326 | ||
1327 | char *vpe_getcwd(int index) | |
1328 | { | |
1329 | struct vpe *v; | |
1330 | ||
1331 | if ((v = get_vpe(index)) == NULL) | |
1332 | return NULL; | |
1333 | ||
1334 | return v->cwd; | |
1335 | } | |
1336 | ||
1337 | EXPORT_SYMBOL(vpe_getcwd); | |
1338 | ||
1339 | #ifdef CONFIG_MIPS_APSP_KSPD | |
1340 | static void kspd_sp_exit( int sp_id) | |
1341 | { | |
1342 | cleanup_tc(get_tc(sp_id)); | |
1343 | } | |
1344 | #endif | |
1345 | ||
736fad17 KS |
1346 | static ssize_t store_kill(struct device *dev, struct device_attribute *attr, |
1347 | const char *buf, size_t len) | |
0f5d0df3 RB |
1348 | { |
1349 | struct vpe *vpe = get_vpe(tclimit); | |
1350 | struct vpe_notifications *not; | |
1351 | ||
1352 | list_for_each_entry(not, &vpe->notify, list) { | |
1353 | not->stop(tclimit); | |
1354 | } | |
1355 | ||
1356 | release_progmem(vpe->load_addr); | |
1357 | cleanup_tc(get_tc(tclimit)); | |
1358 | vpe_stop(vpe); | |
1359 | vpe_free(vpe); | |
1360 | ||
1361 | return len; | |
1362 | } | |
1363 | ||
736fad17 KS |
1364 | static ssize_t show_ntcs(struct device *cd, struct device_attribute *attr, |
1365 | char *buf) | |
41790e04 RB |
1366 | { |
1367 | struct vpe *vpe = get_vpe(tclimit); | |
1368 | ||
1369 | return sprintf(buf, "%d\n", vpe->ntcs); | |
1370 | } | |
1371 | ||
736fad17 KS |
1372 | static ssize_t store_ntcs(struct device *dev, struct device_attribute *attr, |
1373 | const char *buf, size_t len) | |
41790e04 RB |
1374 | { |
1375 | struct vpe *vpe = get_vpe(tclimit); | |
1376 | unsigned long new; | |
1377 | char *endp; | |
1378 | ||
1379 | new = simple_strtoul(buf, &endp, 0); | |
1380 | if (endp == buf) | |
1381 | goto out_einval; | |
1382 | ||
1383 | if (new == 0 || new > (hw_tcs - tclimit)) | |
1384 | goto out_einval; | |
1385 | ||
1386 | vpe->ntcs = new; | |
1387 | ||
1388 | return len; | |
1389 | ||
1390 | out_einval: | |
52a7a27c | 1391 | return -EINVAL; |
41790e04 RB |
1392 | } |
1393 | ||
736fad17 | 1394 | static struct device_attribute vpe_class_attributes[] = { |
0f5d0df3 | 1395 | __ATTR(kill, S_IWUSR, NULL, store_kill), |
41790e04 RB |
1396 | __ATTR(ntcs, S_IRUGO | S_IWUSR, show_ntcs, store_ntcs), |
1397 | {} | |
1398 | }; | |
1399 | ||
736fad17 | 1400 | static void vpe_device_release(struct device *cd) |
41790e04 RB |
1401 | { |
1402 | kfree(cd); | |
1403 | } | |
1404 | ||
1405 | struct class vpe_class = { | |
1406 | .name = "vpe", | |
1407 | .owner = THIS_MODULE, | |
736fad17 KS |
1408 | .dev_release = vpe_device_release, |
1409 | .dev_attrs = vpe_class_attributes, | |
41790e04 RB |
1410 | }; |
1411 | ||
736fad17 | 1412 | struct device vpe_device; |
27a3bbaf | 1413 | |
e01402b1 RB |
1414 | static int __init vpe_module_init(void) |
1415 | { | |
07cc0c9e | 1416 | unsigned int mtflags, vpflags; |
07cc0c9e | 1417 | unsigned long flags, val; |
e01402b1 RB |
1418 | struct vpe *v = NULL; |
1419 | struct tc *t; | |
41790e04 | 1420 | int tc, err; |
e01402b1 RB |
1421 | |
1422 | if (!cpu_has_mipsmt) { | |
1423 | printk("VPE loader: not a MIPS MT capable processor\n"); | |
1424 | return -ENODEV; | |
1425 | } | |
1426 | ||
07cc0c9e RB |
1427 | if (vpelimit == 0) { |
1428 | printk(KERN_WARNING "No VPEs reserved for AP/SP, not " | |
1429 | "initializing VPE loader.\nPass maxvpes=<n> argument as " | |
1430 | "kernel argument\n"); | |
1431 | ||
1432 | return -ENODEV; | |
1433 | } | |
1434 | ||
1435 | if (tclimit == 0) { | |
1436 | printk(KERN_WARNING "No TCs reserved for AP/SP, not " | |
1437 | "initializing VPE loader.\nPass maxtcs=<n> argument as " | |
1438 | "kernel argument\n"); | |
1439 | ||
1440 | return -ENODEV; | |
1441 | } | |
1442 | ||
682e852e AD |
1443 | major = register_chrdev(0, module_name, &vpe_fops); |
1444 | if (major < 0) { | |
e01402b1 | 1445 | printk("VPE loader: unable to register character device\n"); |
307bd284 | 1446 | return major; |
e01402b1 RB |
1447 | } |
1448 | ||
41790e04 RB |
1449 | err = class_register(&vpe_class); |
1450 | if (err) { | |
1451 | printk(KERN_ERR "vpe_class registration failed\n"); | |
27a3bbaf RB |
1452 | goto out_chrdev; |
1453 | } | |
41790e04 | 1454 | |
736fad17 | 1455 | device_initialize(&vpe_device); |
41790e04 RB |
1456 | vpe_device.class = &vpe_class, |
1457 | vpe_device.parent = NULL, | |
1bb5beb4 | 1458 | dev_set_name(&vpe_device, "vpe1"); |
41790e04 | 1459 | vpe_device.devt = MKDEV(major, minor); |
736fad17 | 1460 | err = device_add(&vpe_device); |
41790e04 RB |
1461 | if (err) { |
1462 | printk(KERN_ERR "Adding vpe_device failed\n"); | |
1463 | goto out_class; | |
1464 | } | |
27a3bbaf | 1465 | |
07cc0c9e RB |
1466 | local_irq_save(flags); |
1467 | mtflags = dmt(); | |
1468 | vpflags = dvpe(); | |
e01402b1 RB |
1469 | |
1470 | /* Put MVPE's into 'configuration state' */ | |
340ee4b9 | 1471 | set_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 RB |
1472 | |
1473 | /* dump_mtregs(); */ | |
1474 | ||
e01402b1 | 1475 | val = read_c0_mvpconf0(); |
07cc0c9e RB |
1476 | hw_tcs = (val & MVPCONF0_PTC) + 1; |
1477 | hw_vpes = ((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1; | |
1478 | ||
1479 | for (tc = tclimit; tc < hw_tcs; tc++) { | |
1480 | /* | |
1481 | * Must re-enable multithreading temporarily or in case we | |
1482 | * reschedule send IPIs or similar we might hang. | |
1483 | */ | |
1484 | clear_c0_mvpcontrol(MVPCONTROL_VPC); | |
1485 | evpe(vpflags); | |
1486 | emt(mtflags); | |
1487 | local_irq_restore(flags); | |
1488 | t = alloc_tc(tc); | |
1489 | if (!t) { | |
1490 | err = -ENOMEM; | |
1491 | goto out; | |
1492 | } | |
1493 | ||
1494 | local_irq_save(flags); | |
1495 | mtflags = dmt(); | |
1496 | vpflags = dvpe(); | |
1497 | set_c0_mvpcontrol(MVPCONTROL_VPC); | |
e01402b1 RB |
1498 | |
1499 | /* VPE's */ | |
07cc0c9e RB |
1500 | if (tc < hw_tcs) { |
1501 | settc(tc); | |
e01402b1 | 1502 | |
07cc0c9e | 1503 | if ((v = alloc_vpe(tc)) == NULL) { |
e01402b1 | 1504 | printk(KERN_WARNING "VPE: unable to allocate VPE\n"); |
07cc0c9e RB |
1505 | |
1506 | goto out_reenable; | |
e01402b1 RB |
1507 | } |
1508 | ||
41790e04 RB |
1509 | v->ntcs = hw_tcs - tclimit; |
1510 | ||
2600990e RB |
1511 | /* add the tc to the list of this vpe's tc's. */ |
1512 | list_add(&t->tc, &v->tc); | |
e01402b1 RB |
1513 | |
1514 | /* deactivate all but vpe0 */ | |
07cc0c9e | 1515 | if (tc >= tclimit) { |
e01402b1 RB |
1516 | unsigned long tmp = read_vpe_c0_vpeconf0(); |
1517 | ||
1518 | tmp &= ~VPECONF0_VPA; | |
1519 | ||
1520 | /* master VPE */ | |
1521 | tmp |= VPECONF0_MVP; | |
1522 | write_vpe_c0_vpeconf0(tmp); | |
1523 | } | |
1524 | ||
1525 | /* disable multi-threading with TC's */ | |
1526 | write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() & ~VPECONTROL_TE); | |
1527 | ||
07cc0c9e | 1528 | if (tc >= vpelimit) { |
2600990e RB |
1529 | /* |
1530 | * Set config to be the same as vpe0, | |
1531 | * particularly kseg0 coherency alg | |
1532 | */ | |
e01402b1 RB |
1533 | write_vpe_c0_config(read_c0_config()); |
1534 | } | |
e01402b1 RB |
1535 | } |
1536 | ||
1537 | /* TC's */ | |
1538 | t->pvpe = v; /* set the parent vpe */ | |
1539 | ||
07cc0c9e | 1540 | if (tc >= tclimit) { |
e01402b1 RB |
1541 | unsigned long tmp; |
1542 | ||
07cc0c9e | 1543 | settc(tc); |
e01402b1 | 1544 | |
2600990e RB |
1545 | /* Any TC that is bound to VPE0 gets left as is - in case |
1546 | we are running SMTC on VPE0. A TC that is bound to any | |
1547 | other VPE gets bound to VPE0, ideally I'd like to make | |
1548 | it homeless but it doesn't appear to let me bind a TC | |
1549 | to a non-existent VPE. Which is perfectly reasonable. | |
1550 | ||
1551 | The (un)bound state is visible to an EJTAG probe so may | |
1552 | notify GDB... | |
1553 | */ | |
1554 | ||
1555 | if (((tmp = read_tc_c0_tcbind()) & TCBIND_CURVPE)) { | |
1556 | /* tc is bound >vpe0 */ | |
1557 | write_tc_c0_tcbind(tmp & ~TCBIND_CURVPE); | |
1558 | ||
1559 | t->pvpe = get_vpe(0); /* set the parent vpe */ | |
1560 | } | |
e01402b1 | 1561 | |
7c3a622d NS |
1562 | /* halt the TC */ |
1563 | write_tc_c0_tchalt(TCHALT_H); | |
1564 | mips_ihb(); | |
1565 | ||
e01402b1 RB |
1566 | tmp = read_tc_c0_tcstatus(); |
1567 | ||
2600990e | 1568 | /* mark not activated and not dynamically allocatable */ |
e01402b1 RB |
1569 | tmp &= ~(TCSTATUS_A | TCSTATUS_DA); |
1570 | tmp |= TCSTATUS_IXMT; /* interrupt exempt */ | |
1571 | write_tc_c0_tcstatus(tmp); | |
e01402b1 RB |
1572 | } |
1573 | } | |
1574 | ||
07cc0c9e | 1575 | out_reenable: |
e01402b1 | 1576 | /* release config state */ |
340ee4b9 | 1577 | clear_c0_mvpcontrol(MVPCONTROL_VPC); |
e01402b1 | 1578 | |
07cc0c9e RB |
1579 | evpe(vpflags); |
1580 | emt(mtflags); | |
1581 | local_irq_restore(flags); | |
1582 | ||
2600990e RB |
1583 | #ifdef CONFIG_MIPS_APSP_KSPD |
1584 | kspd_events.kspd_sp_exit = kspd_sp_exit; | |
1585 | #endif | |
e01402b1 | 1586 | return 0; |
27a3bbaf | 1587 | |
41790e04 RB |
1588 | out_class: |
1589 | class_unregister(&vpe_class); | |
27a3bbaf RB |
1590 | out_chrdev: |
1591 | unregister_chrdev(major, module_name); | |
1592 | ||
07cc0c9e | 1593 | out: |
27a3bbaf | 1594 | return err; |
e01402b1 RB |
1595 | } |
1596 | ||
1597 | static void __exit vpe_module_exit(void) | |
1598 | { | |
1599 | struct vpe *v, *n; | |
1600 | ||
1601 | list_for_each_entry_safe(v, n, &vpecontrol.vpe_list, list) { | |
1602 | if (v->state != VPE_STATE_UNUSED) { | |
1603 | release_vpe(v); | |
1604 | } | |
1605 | } | |
1606 | ||
736fad17 | 1607 | device_del(&vpe_device); |
e01402b1 RB |
1608 | unregister_chrdev(major, module_name); |
1609 | } | |
1610 | ||
1611 | module_init(vpe_module_init); | |
1612 | module_exit(vpe_module_exit); | |
1613 | MODULE_DESCRIPTION("MIPS VPE Loader"); | |
2600990e | 1614 | MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc."); |
e01402b1 | 1615 | MODULE_LICENSE("GPL"); |