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1da177e4 LT |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 1995 Linus Torvalds | |
7 | * Copyright (C) 1995 Waldorf Electronics | |
8 | * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 Ralf Baechle | |
9 | * Copyright (C) 1996 Stoned Elipot | |
10 | * Copyright (C) 1999 Silicon Graphics, Inc. | |
11 | * Copyright (C) 2000 2001, 2002 Maciej W. Rozycki | |
12 | */ | |
1da177e4 LT |
13 | #include <linux/errno.h> |
14 | #include <linux/init.h> | |
15 | #include <linux/ioport.h> | |
16 | #include <linux/sched.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/stddef.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/user.h> | |
25 | #include <linux/utsname.h> | |
26 | #include <linux/a.out.h> | |
27 | #include <linux/tty.h> | |
28 | #include <linux/bootmem.h> | |
29 | #include <linux/initrd.h> | |
30 | #include <linux/major.h> | |
31 | #include <linux/kdev_t.h> | |
32 | #include <linux/root_dev.h> | |
33 | #include <linux/highmem.h> | |
34 | #include <linux/console.h> | |
b4819b59 | 35 | #include <linux/mmzone.h> |
22a9835c | 36 | #include <linux/pfn.h> |
1da177e4 LT |
37 | |
38 | #include <asm/addrspace.h> | |
39 | #include <asm/bootinfo.h> | |
ec74e361 | 40 | #include <asm/cache.h> |
1da177e4 LT |
41 | #include <asm/cpu.h> |
42 | #include <asm/sections.h> | |
43 | #include <asm/setup.h> | |
44 | #include <asm/system.h> | |
45 | ||
ec74e361 | 46 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
1da177e4 LT |
47 | |
48 | EXPORT_SYMBOL(cpu_data); | |
49 | ||
50 | #ifdef CONFIG_VT | |
51 | struct screen_info screen_info; | |
52 | #endif | |
53 | ||
54 | /* | |
55 | * Despite it's name this variable is even if we don't have PCI | |
56 | */ | |
57 | unsigned int PCI_DMA_BUS_IS_PHYS; | |
58 | ||
59 | EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS); | |
60 | ||
61 | /* | |
62 | * Setup information | |
63 | * | |
64 | * These are initialized so they are in the .data section | |
65 | */ | |
ec74e361 RB |
66 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
67 | unsigned long mips_machgroup __read_mostly = MACH_GROUP_UNKNOWN; | |
1da177e4 LT |
68 | |
69 | EXPORT_SYMBOL(mips_machtype); | |
70 | EXPORT_SYMBOL(mips_machgroup); | |
71 | ||
72 | struct boot_mem_map boot_mem_map; | |
73 | ||
74 | static char command_line[CL_SIZE]; | |
75 | char arcs_cmdline[CL_SIZE]=CONFIG_CMDLINE; | |
76 | ||
77 | /* | |
78 | * mips_io_port_base is the begin of the address space to which x86 style | |
79 | * I/O ports are mapped. | |
80 | */ | |
ec74e361 | 81 | const unsigned long mips_io_port_base __read_mostly = -1; |
1da177e4 LT |
82 | EXPORT_SYMBOL(mips_io_port_base); |
83 | ||
84 | /* | |
85 | * isa_slot_offset is the address where E(ISA) busaddress 0 is mapped | |
86 | * for the processor. | |
87 | */ | |
88 | unsigned long isa_slot_offset; | |
89 | EXPORT_SYMBOL(isa_slot_offset); | |
90 | ||
91 | static struct resource code_resource = { .name = "Kernel code", }; | |
92 | static struct resource data_resource = { .name = "Kernel data", }; | |
93 | ||
94 | void __init add_memory_region(phys_t start, phys_t size, long type) | |
95 | { | |
96 | int x = boot_mem_map.nr_map; | |
97 | struct boot_mem_map_entry *prev = boot_mem_map.map + x - 1; | |
98 | ||
99 | /* | |
100 | * Try to merge with previous entry if any. This is far less than | |
101 | * perfect but is sufficient for most real world cases. | |
102 | */ | |
103 | if (x && prev->addr + prev->size == start && prev->type == type) { | |
104 | prev->size += size; | |
105 | return; | |
106 | } | |
107 | ||
108 | if (x == BOOT_MEM_MAP_MAX) { | |
109 | printk("Ooops! Too many entries in the memory map!\n"); | |
110 | return; | |
111 | } | |
112 | ||
113 | boot_mem_map.map[x].addr = start; | |
114 | boot_mem_map.map[x].size = size; | |
115 | boot_mem_map.map[x].type = type; | |
116 | boot_mem_map.nr_map++; | |
117 | } | |
118 | ||
119 | static void __init print_memory_map(void) | |
120 | { | |
121 | int i; | |
122 | const int field = 2 * sizeof(unsigned long); | |
123 | ||
124 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
125 | printk(" memory: %0*Lx @ %0*Lx ", | |
126 | field, (unsigned long long) boot_mem_map.map[i].size, | |
127 | field, (unsigned long long) boot_mem_map.map[i].addr); | |
128 | ||
129 | switch (boot_mem_map.map[i].type) { | |
130 | case BOOT_MEM_RAM: | |
131 | printk("(usable)\n"); | |
132 | break; | |
133 | case BOOT_MEM_ROM_DATA: | |
134 | printk("(ROM data)\n"); | |
135 | break; | |
136 | case BOOT_MEM_RESERVED: | |
137 | printk("(reserved)\n"); | |
138 | break; | |
139 | default: | |
140 | printk("type %lu\n", boot_mem_map.map[i].type); | |
141 | break; | |
142 | } | |
143 | } | |
144 | } | |
145 | ||
146 | static inline void parse_cmdline_early(void) | |
147 | { | |
148 | char c = ' ', *to = command_line, *from = saved_command_line; | |
149 | unsigned long start_at, mem_size; | |
150 | int len = 0; | |
151 | int usermem = 0; | |
152 | ||
153 | printk("Determined physical RAM map:\n"); | |
154 | print_memory_map(); | |
155 | ||
156 | for (;;) { | |
157 | /* | |
158 | * "mem=XXX[kKmM]" defines a memory region from | |
159 | * 0 to <XXX>, overriding the determined size. | |
160 | * "mem=XXX[KkmM]@YYY[KkmM]" defines a memory region from | |
161 | * <YYY> to <YYY>+<XXX>, overriding the determined size. | |
162 | */ | |
163 | if (c == ' ' && !memcmp(from, "mem=", 4)) { | |
164 | if (to != command_line) | |
165 | to--; | |
166 | /* | |
167 | * If a user specifies memory size, we | |
168 | * blow away any automatically generated | |
169 | * size. | |
170 | */ | |
171 | if (usermem == 0) { | |
172 | boot_mem_map.nr_map = 0; | |
173 | usermem = 1; | |
174 | } | |
175 | mem_size = memparse(from + 4, &from); | |
176 | if (*from == '@') | |
177 | start_at = memparse(from + 1, &from); | |
178 | else | |
179 | start_at = 0; | |
180 | add_memory_region(start_at, mem_size, BOOT_MEM_RAM); | |
181 | } | |
182 | c = *(from++); | |
183 | if (!c) | |
184 | break; | |
185 | if (CL_SIZE <= ++len) | |
186 | break; | |
187 | *(to++) = c; | |
188 | } | |
189 | *to = '\0'; | |
190 | ||
191 | if (usermem) { | |
192 | printk("User-defined physical RAM map:\n"); | |
193 | print_memory_map(); | |
194 | } | |
195 | } | |
196 | ||
197 | static inline int parse_rd_cmdline(unsigned long* rd_start, unsigned long* rd_end) | |
198 | { | |
199 | /* | |
200 | * "rd_start=0xNNNNNNNN" defines the memory address of an initrd | |
201 | * "rd_size=0xNN" it's size | |
202 | */ | |
203 | unsigned long start = 0; | |
204 | unsigned long size = 0; | |
205 | unsigned long end; | |
206 | char cmd_line[CL_SIZE]; | |
207 | char *start_str; | |
208 | char *size_str; | |
209 | char *tmp; | |
210 | ||
211 | strcpy(cmd_line, command_line); | |
212 | *command_line = 0; | |
213 | tmp = cmd_line; | |
214 | /* Ignore "rd_start=" strings in other parameters. */ | |
215 | start_str = strstr(cmd_line, "rd_start="); | |
216 | if (start_str && start_str != cmd_line && *(start_str - 1) != ' ') | |
217 | start_str = strstr(start_str, " rd_start="); | |
218 | while (start_str) { | |
219 | if (start_str != cmd_line) | |
220 | strncat(command_line, tmp, start_str - tmp); | |
221 | start = memparse(start_str + 9, &start_str); | |
222 | tmp = start_str + 1; | |
223 | start_str = strstr(start_str, " rd_start="); | |
224 | } | |
225 | if (*tmp) | |
226 | strcat(command_line, tmp); | |
227 | ||
228 | strcpy(cmd_line, command_line); | |
229 | *command_line = 0; | |
230 | tmp = cmd_line; | |
231 | /* Ignore "rd_size" strings in other parameters. */ | |
232 | size_str = strstr(cmd_line, "rd_size="); | |
233 | if (size_str && size_str != cmd_line && *(size_str - 1) != ' ') | |
234 | size_str = strstr(size_str, " rd_size="); | |
235 | while (size_str) { | |
236 | if (size_str != cmd_line) | |
237 | strncat(command_line, tmp, size_str - tmp); | |
238 | size = memparse(size_str + 8, &size_str); | |
239 | tmp = size_str + 1; | |
240 | size_str = strstr(size_str, " rd_size="); | |
241 | } | |
242 | if (*tmp) | |
243 | strcat(command_line, tmp); | |
244 | ||
875d43e7 | 245 | #ifdef CONFIG_64BIT |
1da177e4 LT |
246 | /* HACK: Guess if the sign extension was forgotten */ |
247 | if (start > 0x0000000080000000 && start < 0x00000000ffffffff) | |
460c0422 | 248 | start |= 0xffffffff00000000UL; |
1da177e4 LT |
249 | #endif |
250 | ||
251 | end = start + size; | |
252 | if (start && end) { | |
253 | *rd_start = start; | |
254 | *rd_end = end; | |
255 | return 1; | |
256 | } | |
257 | return 0; | |
258 | } | |
259 | ||
1da177e4 LT |
260 | #define MAXMEM HIGHMEM_START |
261 | #define MAXMEM_PFN PFN_DOWN(MAXMEM) | |
262 | ||
263 | static inline void bootmem_init(void) | |
264 | { | |
265 | unsigned long start_pfn; | |
266 | unsigned long reserved_end = (unsigned long)&_end; | |
267 | #ifndef CONFIG_SGI_IP27 | |
268 | unsigned long first_usable_pfn; | |
269 | unsigned long bootmap_size; | |
270 | int i; | |
271 | #endif | |
272 | #ifdef CONFIG_BLK_DEV_INITRD | |
273 | int initrd_reserve_bootmem = 0; | |
274 | ||
275 | /* Board specific code should have set up initrd_start and initrd_end */ | |
276 | ROOT_DEV = Root_RAM0; | |
277 | if (parse_rd_cmdline(&initrd_start, &initrd_end)) { | |
278 | reserved_end = max(reserved_end, initrd_end); | |
279 | initrd_reserve_bootmem = 1; | |
280 | } else { | |
281 | unsigned long tmp; | |
282 | u32 *initrd_header; | |
283 | ||
284 | tmp = ((reserved_end + PAGE_SIZE-1) & PAGE_MASK) - sizeof(u32) * 2; | |
285 | if (tmp < reserved_end) | |
286 | tmp += PAGE_SIZE; | |
287 | initrd_header = (u32 *)tmp; | |
288 | if (initrd_header[0] == 0x494E5244) { | |
289 | initrd_start = (unsigned long)&initrd_header[2]; | |
290 | initrd_end = initrd_start + initrd_header[1]; | |
291 | reserved_end = max(reserved_end, initrd_end); | |
292 | initrd_reserve_bootmem = 1; | |
293 | } | |
294 | } | |
295 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
296 | ||
297 | /* | |
298 | * Partially used pages are not usable - thus | |
299 | * we are rounding upwards. | |
300 | */ | |
301 | start_pfn = PFN_UP(CPHYSADDR(reserved_end)); | |
302 | ||
303 | #ifndef CONFIG_SGI_IP27 | |
304 | /* Find the highest page frame number we have available. */ | |
305 | max_pfn = 0; | |
306 | first_usable_pfn = -1UL; | |
307 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
308 | unsigned long start, end; | |
309 | ||
310 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
311 | continue; | |
312 | ||
313 | start = PFN_UP(boot_mem_map.map[i].addr); | |
314 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
315 | + boot_mem_map.map[i].size); | |
316 | ||
317 | if (start >= end) | |
318 | continue; | |
319 | if (end > max_pfn) | |
320 | max_pfn = end; | |
321 | if (start < first_usable_pfn) { | |
322 | if (start > start_pfn) { | |
323 | first_usable_pfn = start; | |
324 | } else if (end > start_pfn) { | |
325 | first_usable_pfn = start_pfn; | |
326 | } | |
327 | } | |
328 | } | |
329 | ||
330 | /* | |
331 | * Determine low and high memory ranges | |
332 | */ | |
333 | max_low_pfn = max_pfn; | |
334 | if (max_low_pfn > MAXMEM_PFN) { | |
335 | max_low_pfn = MAXMEM_PFN; | |
336 | #ifndef CONFIG_HIGHMEM | |
337 | /* Maximum memory usable is what is directly addressable */ | |
338 | printk(KERN_WARNING "Warning only %ldMB will be used.\n", | |
339 | MAXMEM >> 20); | |
340 | printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); | |
341 | #endif | |
342 | } | |
343 | ||
344 | #ifdef CONFIG_HIGHMEM | |
345 | /* | |
346 | * Crude, we really should make a better attempt at detecting | |
347 | * highstart_pfn | |
348 | */ | |
349 | highstart_pfn = highend_pfn = max_pfn; | |
350 | if (max_pfn > MAXMEM_PFN) { | |
351 | highstart_pfn = MAXMEM_PFN; | |
352 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", | |
353 | (highend_pfn - highstart_pfn) >> (20 - PAGE_SHIFT)); | |
354 | } | |
355 | #endif | |
356 | ||
357 | /* Initialize the boot-time allocator with low memory only. */ | |
358 | bootmap_size = init_bootmem(first_usable_pfn, max_low_pfn); | |
359 | ||
360 | /* | |
361 | * Register fully available low RAM pages with the bootmem allocator. | |
362 | */ | |
363 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
364 | unsigned long curr_pfn, last_pfn, size; | |
365 | ||
366 | /* | |
367 | * Reserve usable memory. | |
368 | */ | |
369 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
370 | continue; | |
371 | ||
372 | /* | |
373 | * We are rounding up the start address of usable memory: | |
374 | */ | |
375 | curr_pfn = PFN_UP(boot_mem_map.map[i].addr); | |
376 | if (curr_pfn >= max_low_pfn) | |
377 | continue; | |
378 | if (curr_pfn < start_pfn) | |
379 | curr_pfn = start_pfn; | |
380 | ||
381 | /* | |
382 | * ... and at the end of the usable range downwards: | |
383 | */ | |
384 | last_pfn = PFN_DOWN(boot_mem_map.map[i].addr | |
385 | + boot_mem_map.map[i].size); | |
386 | ||
387 | if (last_pfn > max_low_pfn) | |
388 | last_pfn = max_low_pfn; | |
389 | ||
390 | /* | |
391 | * Only register lowmem part of lowmem segment with bootmem. | |
392 | */ | |
393 | size = last_pfn - curr_pfn; | |
394 | if (curr_pfn > PFN_DOWN(HIGHMEM_START)) | |
395 | continue; | |
396 | if (curr_pfn + size - 1 > PFN_DOWN(HIGHMEM_START)) | |
397 | size = PFN_DOWN(HIGHMEM_START) - curr_pfn; | |
398 | if (!size) | |
399 | continue; | |
400 | ||
401 | /* | |
402 | * ... finally, did all the rounding and playing | |
403 | * around just make the area go away? | |
404 | */ | |
405 | if (last_pfn <= curr_pfn) | |
406 | continue; | |
407 | ||
408 | /* Register lowmem ranges */ | |
409 | free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size)); | |
b1c231f5 | 410 | memory_present(0, curr_pfn, curr_pfn + size - 1); |
1da177e4 LT |
411 | } |
412 | ||
413 | /* Reserve the bootmap memory. */ | |
414 | reserve_bootmem(PFN_PHYS(first_usable_pfn), bootmap_size); | |
415 | #endif /* CONFIG_SGI_IP27 */ | |
416 | ||
417 | #ifdef CONFIG_BLK_DEV_INITRD | |
418 | initrd_below_start_ok = 1; | |
419 | if (initrd_start) { | |
ecf52d3c AN |
420 | unsigned long initrd_size = ((unsigned char *)initrd_end) - |
421 | ((unsigned char *)initrd_start); | |
422 | const int width = sizeof(long) * 2; | |
423 | ||
1da177e4 LT |
424 | printk("Initial ramdisk at: 0x%p (%lu bytes)\n", |
425 | (void *)initrd_start, initrd_size); | |
426 | ||
427 | if (CPHYSADDR(initrd_end) > PFN_PHYS(max_low_pfn)) { | |
428 | printk("initrd extends beyond end of memory " | |
429 | "(0x%0*Lx > 0x%0*Lx)\ndisabling initrd\n", | |
ecf52d3c AN |
430 | width, |
431 | (unsigned long long) CPHYSADDR(initrd_end), | |
432 | width, | |
433 | (unsigned long long) PFN_PHYS(max_low_pfn)); | |
1da177e4 LT |
434 | initrd_start = initrd_end = 0; |
435 | initrd_reserve_bootmem = 0; | |
436 | } | |
437 | ||
438 | if (initrd_reserve_bootmem) | |
439 | reserve_bootmem(CPHYSADDR(initrd_start), initrd_size); | |
440 | } | |
441 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
442 | } | |
443 | ||
2925aba4 RB |
444 | /* |
445 | * arch_mem_init - initialize memory managment subsystem | |
446 | * | |
447 | * o plat_mem_setup() detects the memory configuration and will record detected | |
448 | * memory areas using add_memory_region. | |
449 | * o parse_cmdline_early() parses the command line for mem= options which, | |
450 | * iff detected, will override the results of the automatic detection. | |
451 | * | |
452 | * At this stage the memory configuration of the system is known to the | |
453 | * kernel but generic memory managment system is still entirely uninitialized. | |
454 | * | |
455 | * o bootmem_init() | |
456 | * o sparse_init() | |
457 | * o paging_init() | |
458 | * | |
459 | * At this stage the bootmem allocator is ready to use. | |
460 | * | |
461 | * NOTE: historically plat_mem_setup did the entire platform initialization. | |
462 | * This was rather impractical because it meant plat_mem_setup had to | |
463 | * get away without any kind of memory allocator. To keep old code from | |
464 | * breaking plat_setup was just renamed to plat_setup and a second platform | |
465 | * initialization hook for anything else was introduced. | |
466 | */ | |
467 | ||
468 | extern void plat_mem_setup(void); | |
469 | ||
470 | static void __init arch_mem_init(char **cmdline_p) | |
471 | { | |
472 | /* call board setup routine */ | |
473 | plat_mem_setup(); | |
474 | ||
475 | strlcpy(command_line, arcs_cmdline, sizeof(command_line)); | |
476 | strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE); | |
477 | ||
478 | *cmdline_p = command_line; | |
479 | ||
480 | parse_cmdline_early(); | |
481 | bootmem_init(); | |
482 | sparse_init(); | |
483 | paging_init(); | |
484 | } | |
485 | ||
1da177e4 LT |
486 | static inline void resource_init(void) |
487 | { | |
488 | int i; | |
489 | ||
6adb5fe7 RB |
490 | if (UNCAC_BASE != IO_BASE) |
491 | return; | |
492 | ||
1da177e4 LT |
493 | code_resource.start = virt_to_phys(&_text); |
494 | code_resource.end = virt_to_phys(&_etext) - 1; | |
495 | data_resource.start = virt_to_phys(&_etext); | |
496 | data_resource.end = virt_to_phys(&_edata) - 1; | |
1da177e4 LT |
497 | |
498 | /* | |
499 | * Request address space for all standard RAM. | |
500 | */ | |
501 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
502 | struct resource *res; | |
503 | unsigned long start, end; | |
504 | ||
505 | start = boot_mem_map.map[i].addr; | |
506 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; | |
507 | if (start >= MAXMEM) | |
508 | continue; | |
509 | if (end >= MAXMEM) | |
510 | end = MAXMEM - 1; | |
511 | ||
512 | res = alloc_bootmem(sizeof(struct resource)); | |
513 | switch (boot_mem_map.map[i].type) { | |
514 | case BOOT_MEM_RAM: | |
515 | case BOOT_MEM_ROM_DATA: | |
516 | res->name = "System RAM"; | |
517 | break; | |
518 | case BOOT_MEM_RESERVED: | |
519 | default: | |
520 | res->name = "reserved"; | |
521 | } | |
522 | ||
523 | res->start = start; | |
524 | res->end = end; | |
525 | ||
526 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
527 | request_resource(&iomem_resource, res); | |
528 | ||
529 | /* | |
530 | * We don't know which RAM region contains kernel data, | |
531 | * so we try it repeatedly and let the resource manager | |
532 | * test it. | |
533 | */ | |
534 | request_resource(res, &code_resource); | |
535 | request_resource(res, &data_resource); | |
536 | } | |
537 | } | |
538 | ||
1da177e4 LT |
539 | #undef MAXMEM |
540 | #undef MAXMEM_PFN | |
541 | ||
1da177e4 LT |
542 | void __init setup_arch(char **cmdline_p) |
543 | { | |
544 | cpu_probe(); | |
545 | prom_init(); | |
546 | cpu_report(); | |
547 | ||
548 | #if defined(CONFIG_VT) | |
549 | #if defined(CONFIG_VGA_CONSOLE) | |
550 | conswitchp = &vga_con; | |
551 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
552 | conswitchp = &dummy_con; | |
553 | #endif | |
554 | #endif | |
555 | ||
2925aba4 | 556 | arch_mem_init(cmdline_p); |
1da177e4 | 557 | |
1da177e4 | 558 | resource_init(); |
9b6695a8 RB |
559 | #ifdef CONFIG_SMP |
560 | plat_smp_setup(); | |
561 | #endif | |
1da177e4 LT |
562 | } |
563 | ||
564 | int __init fpu_disable(char *s) | |
565 | { | |
f088fc84 RB |
566 | int i; |
567 | ||
568 | for (i = 0; i < NR_CPUS; i++) | |
569 | cpu_data[i].options &= ~MIPS_CPU_FPU; | |
1da177e4 LT |
570 | |
571 | return 1; | |
572 | } | |
573 | ||
574 | __setup("nofpu", fpu_disable); | |
e50c0a8f RB |
575 | |
576 | int __init dsp_disable(char *s) | |
577 | { | |
578 | cpu_data[0].ases &= ~MIPS_ASE_DSP; | |
579 | ||
580 | return 1; | |
581 | } | |
582 | ||
583 | __setup("nodsp", dsp_disable); |