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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. | |
20d60d99 | 11 | * Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki |
1da177e4 | 12 | */ |
1da177e4 LT |
13 | #include <linux/init.h> |
14 | #include <linux/ioport.h> | |
1da177e4 | 15 | #include <linux/module.h> |
894673ee | 16 | #include <linux/screen_info.h> |
1da177e4 LT |
17 | #include <linux/bootmem.h> |
18 | #include <linux/initrd.h> | |
1da177e4 LT |
19 | #include <linux/root_dev.h> |
20 | #include <linux/highmem.h> | |
21 | #include <linux/console.h> | |
22a9835c | 22 | #include <linux/pfn.h> |
6312e0ee | 23 | #include <linux/debugfs.h> |
1da177e4 LT |
24 | |
25 | #include <asm/addrspace.h> | |
26 | #include <asm/bootinfo.h> | |
20d60d99 | 27 | #include <asm/bugs.h> |
ec74e361 | 28 | #include <asm/cache.h> |
1da177e4 LT |
29 | #include <asm/cpu.h> |
30 | #include <asm/sections.h> | |
31 | #include <asm/setup.h> | |
32 | #include <asm/system.h> | |
33 | ||
ec74e361 | 34 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
1da177e4 LT |
35 | |
36 | EXPORT_SYMBOL(cpu_data); | |
37 | ||
38 | #ifdef CONFIG_VT | |
39 | struct screen_info screen_info; | |
40 | #endif | |
41 | ||
42 | /* | |
43 | * Despite it's name this variable is even if we don't have PCI | |
44 | */ | |
45 | unsigned int PCI_DMA_BUS_IS_PHYS; | |
46 | ||
47 | EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS); | |
48 | ||
49 | /* | |
50 | * Setup information | |
51 | * | |
52 | * These are initialized so they are in the .data section | |
53 | */ | |
ec74e361 | 54 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
1da177e4 LT |
55 | |
56 | EXPORT_SYMBOL(mips_machtype); | |
1da177e4 LT |
57 | |
58 | struct boot_mem_map boot_mem_map; | |
59 | ||
60 | static char command_line[CL_SIZE]; | |
61 | char arcs_cmdline[CL_SIZE]=CONFIG_CMDLINE; | |
62 | ||
63 | /* | |
64 | * mips_io_port_base is the begin of the address space to which x86 style | |
65 | * I/O ports are mapped. | |
66 | */ | |
ec74e361 | 67 | const unsigned long mips_io_port_base __read_mostly = -1; |
1da177e4 LT |
68 | EXPORT_SYMBOL(mips_io_port_base); |
69 | ||
70 | /* | |
71 | * isa_slot_offset is the address where E(ISA) busaddress 0 is mapped | |
72 | * for the processor. | |
73 | */ | |
74 | unsigned long isa_slot_offset; | |
75 | EXPORT_SYMBOL(isa_slot_offset); | |
76 | ||
77 | static struct resource code_resource = { .name = "Kernel code", }; | |
78 | static struct resource data_resource = { .name = "Kernel data", }; | |
79 | ||
80 | void __init add_memory_region(phys_t start, phys_t size, long type) | |
81 | { | |
82 | int x = boot_mem_map.nr_map; | |
83 | struct boot_mem_map_entry *prev = boot_mem_map.map + x - 1; | |
84 | ||
b6f1f0de FBH |
85 | /* Sanity check */ |
86 | if (start + size < start) { | |
87 | printk("Trying to add an invalid memory region, skipped\n"); | |
88 | return; | |
89 | } | |
90 | ||
1da177e4 LT |
91 | /* |
92 | * Try to merge with previous entry if any. This is far less than | |
93 | * perfect but is sufficient for most real world cases. | |
94 | */ | |
95 | if (x && prev->addr + prev->size == start && prev->type == type) { | |
96 | prev->size += size; | |
97 | return; | |
98 | } | |
99 | ||
100 | if (x == BOOT_MEM_MAP_MAX) { | |
101 | printk("Ooops! Too many entries in the memory map!\n"); | |
102 | return; | |
103 | } | |
104 | ||
105 | boot_mem_map.map[x].addr = start; | |
106 | boot_mem_map.map[x].size = size; | |
107 | boot_mem_map.map[x].type = type; | |
108 | boot_mem_map.nr_map++; | |
109 | } | |
110 | ||
111 | static void __init print_memory_map(void) | |
112 | { | |
113 | int i; | |
114 | const int field = 2 * sizeof(unsigned long); | |
115 | ||
116 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
117 | printk(" memory: %0*Lx @ %0*Lx ", | |
118 | field, (unsigned long long) boot_mem_map.map[i].size, | |
119 | field, (unsigned long long) boot_mem_map.map[i].addr); | |
120 | ||
121 | switch (boot_mem_map.map[i].type) { | |
122 | case BOOT_MEM_RAM: | |
123 | printk("(usable)\n"); | |
124 | break; | |
125 | case BOOT_MEM_ROM_DATA: | |
126 | printk("(ROM data)\n"); | |
127 | break; | |
128 | case BOOT_MEM_RESERVED: | |
129 | printk("(reserved)\n"); | |
130 | break; | |
131 | default: | |
132 | printk("type %lu\n", boot_mem_map.map[i].type); | |
133 | break; | |
134 | } | |
135 | } | |
136 | } | |
137 | ||
d2043ca8 FBH |
138 | /* |
139 | * Manage initrd | |
140 | */ | |
141 | #ifdef CONFIG_BLK_DEV_INITRD | |
142 | ||
a09fc446 | 143 | static int __init rd_start_early(char *p) |
1da177e4 | 144 | { |
a09fc446 | 145 | unsigned long start = memparse(p, &p); |
1da177e4 | 146 | |
875d43e7 | 147 | #ifdef CONFIG_64BIT |
a7837b76 FBH |
148 | /* Guess if the sign extension was forgotten by bootloader */ |
149 | if (start < XKPHYS) | |
150 | start = (int)start; | |
1da177e4 | 151 | #endif |
a09fc446 FBH |
152 | initrd_start = start; |
153 | initrd_end += start; | |
a09fc446 FBH |
154 | return 0; |
155 | } | |
156 | early_param("rd_start", rd_start_early); | |
157 | ||
158 | static int __init rd_size_early(char *p) | |
159 | { | |
160 | initrd_end += memparse(p, &p); | |
1da177e4 LT |
161 | return 0; |
162 | } | |
a09fc446 | 163 | early_param("rd_size", rd_size_early); |
1da177e4 | 164 | |
a7837b76 | 165 | /* it returns the next free pfn after initrd */ |
d2043ca8 FBH |
166 | static unsigned long __init init_initrd(void) |
167 | { | |
a7837b76 | 168 | unsigned long end; |
d2043ca8 FBH |
169 | u32 *initrd_header; |
170 | ||
d2043ca8 | 171 | /* |
a09fc446 FBH |
172 | * Board specific code or command line parser should have |
173 | * already set up initrd_start and initrd_end. In these cases | |
174 | * perfom sanity checks and use them if all looks good. | |
d2043ca8 | 175 | */ |
a7837b76 FBH |
176 | if (initrd_start && initrd_end > initrd_start) |
177 | goto sanitize; | |
178 | ||
179 | /* | |
180 | * See if initrd has been added to the kernel image by | |
181 | * arch/mips/boot/addinitrd.c. In that case a header is | |
182 | * prepended to initrd and is made up by 8 bytes. The fisrt | |
183 | * word is a magic number and the second one is the size of | |
184 | * initrd. Initrd start must be page aligned in any cases. | |
185 | */ | |
186 | initrd_header = __va(PAGE_ALIGN(__pa_symbol(&_end) + 8)) - 8; | |
187 | if (initrd_header[0] != 0x494E5244) | |
188 | goto disable; | |
189 | initrd_start = (unsigned long)(initrd_header + 2); | |
190 | initrd_end = initrd_start + initrd_header[1]; | |
191 | ||
192 | sanitize: | |
193 | if (initrd_start & ~PAGE_MASK) { | |
194 | printk(KERN_ERR "initrd start must be page aligned\n"); | |
195 | goto disable; | |
d2043ca8 | 196 | } |
a7837b76 FBH |
197 | if (initrd_start < PAGE_OFFSET) { |
198 | printk(KERN_ERR "initrd start < PAGE_OFFSET\n"); | |
199 | goto disable; | |
200 | } | |
201 | ||
202 | /* | |
203 | * Sanitize initrd addresses. For example firmware | |
204 | * can't guess if they need to pass them through | |
205 | * 64-bits values if the kernel has been built in pure | |
206 | * 32-bit. We need also to switch from KSEG0 to XKPHYS | |
207 | * addresses now, so the code can now safely use __pa(). | |
208 | */ | |
209 | end = __pa(initrd_end); | |
210 | initrd_end = (unsigned long)__va(end); | |
211 | initrd_start = (unsigned long)__va(__pa(initrd_start)); | |
212 | ||
213 | ROOT_DEV = Root_RAM0; | |
214 | return PFN_UP(end); | |
215 | disable: | |
216 | initrd_start = 0; | |
217 | initrd_end = 0; | |
218 | return 0; | |
d2043ca8 FBH |
219 | } |
220 | ||
221 | static void __init finalize_initrd(void) | |
222 | { | |
223 | unsigned long size = initrd_end - initrd_start; | |
224 | ||
225 | if (size == 0) { | |
226 | printk(KERN_INFO "Initrd not found or empty"); | |
227 | goto disable; | |
228 | } | |
d4df6d4e | 229 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
d2043ca8 FBH |
230 | printk("Initrd extends beyond end of memory"); |
231 | goto disable; | |
232 | } | |
233 | ||
d4df6d4e | 234 | reserve_bootmem(__pa(initrd_start), size); |
d2043ca8 FBH |
235 | initrd_below_start_ok = 1; |
236 | ||
237 | printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n", | |
238 | initrd_start, size); | |
239 | return; | |
240 | disable: | |
241 | printk(" - disabling initrd\n"); | |
242 | initrd_start = 0; | |
243 | initrd_end = 0; | |
244 | } | |
245 | ||
246 | #else /* !CONFIG_BLK_DEV_INITRD */ | |
247 | ||
9ba126cf RB |
248 | static unsigned long __init init_initrd(void) |
249 | { | |
250 | return 0; | |
251 | } | |
252 | ||
d2043ca8 FBH |
253 | #define finalize_initrd() do {} while (0) |
254 | ||
255 | #endif | |
256 | ||
b6f1f0de FBH |
257 | /* |
258 | * Initialize the bootmem allocator. It also setup initrd related data | |
259 | * if needed. | |
260 | */ | |
d2043ca8 FBH |
261 | #ifdef CONFIG_SGI_IP27 |
262 | ||
b6f1f0de | 263 | static void __init bootmem_init(void) |
1da177e4 | 264 | { |
d2043ca8 FBH |
265 | init_initrd(); |
266 | finalize_initrd(); | |
267 | } | |
268 | ||
269 | #else /* !CONFIG_SGI_IP27 */ | |
270 | ||
271 | static void __init bootmem_init(void) | |
272 | { | |
e452e94e | 273 | unsigned long reserved_end; |
db84dc61 | 274 | unsigned long mapstart = ~0UL; |
1da177e4 LT |
275 | unsigned long bootmap_size; |
276 | int i; | |
1da177e4 LT |
277 | |
278 | /* | |
d2043ca8 FBH |
279 | * Init any data related to initrd. It's a nop if INITRD is |
280 | * not selected. Once that done we can determine the low bound | |
281 | * of usable memory. | |
1da177e4 | 282 | */ |
a7837b76 | 283 | reserved_end = max(init_initrd(), PFN_UP(__pa_symbol(&_end))); |
1da177e4 | 284 | |
db84dc61 FBH |
285 | /* |
286 | * max_low_pfn is not a number of pages. The number of pages | |
287 | * of the system is given by 'max_low_pfn - min_low_pfn'. | |
288 | */ | |
289 | min_low_pfn = ~0UL; | |
290 | max_low_pfn = 0; | |
291 | ||
b6f1f0de FBH |
292 | /* |
293 | * Find the highest page frame number we have available. | |
294 | */ | |
1da177e4 LT |
295 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
296 | unsigned long start, end; | |
297 | ||
298 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
299 | continue; | |
300 | ||
301 | start = PFN_UP(boot_mem_map.map[i].addr); | |
302 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
b6f1f0de | 303 | + boot_mem_map.map[i].size); |
1da177e4 | 304 | |
db84dc61 FBH |
305 | if (end > max_low_pfn) |
306 | max_low_pfn = end; | |
307 | if (start < min_low_pfn) | |
308 | min_low_pfn = start; | |
b6f1f0de | 309 | if (end <= reserved_end) |
1da177e4 | 310 | continue; |
b6f1f0de FBH |
311 | if (start >= mapstart) |
312 | continue; | |
313 | mapstart = max(reserved_end, start); | |
1da177e4 LT |
314 | } |
315 | ||
db84dc61 FBH |
316 | if (min_low_pfn >= max_low_pfn) |
317 | panic("Incorrect memory mapping !!!"); | |
6f284a2c | 318 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
db84dc61 FBH |
319 | printk(KERN_INFO |
320 | "Wasting %lu bytes for tracking %lu unused pages\n", | |
6f284a2c FBH |
321 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), |
322 | min_low_pfn - ARCH_PFN_OFFSET); | |
323 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { | |
324 | printk(KERN_INFO | |
325 | "%lu free pages won't be used\n", | |
326 | ARCH_PFN_OFFSET - min_low_pfn); | |
db84dc61 | 327 | } |
6f284a2c | 328 | min_low_pfn = ARCH_PFN_OFFSET; |
db84dc61 | 329 | |
1da177e4 LT |
330 | /* |
331 | * Determine low and high memory ranges | |
332 | */ | |
db84dc61 | 333 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
b6f1f0de FBH |
334 | #ifdef CONFIG_HIGHMEM |
335 | highstart_pfn = PFN_DOWN(HIGHMEM_START); | |
db84dc61 | 336 | highend_pfn = max_low_pfn; |
1da177e4 | 337 | #endif |
db84dc61 | 338 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
1da177e4 LT |
339 | } |
340 | ||
1da177e4 | 341 | /* |
b6f1f0de | 342 | * Initialize the boot-time allocator with low memory only. |
1da177e4 | 343 | */ |
db84dc61 FBH |
344 | bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, |
345 | min_low_pfn, max_low_pfn); | |
cce335ae RB |
346 | |
347 | ||
cce335ae RB |
348 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
349 | unsigned long start, end; | |
350 | ||
351 | start = PFN_UP(boot_mem_map.map[i].addr); | |
352 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
353 | + boot_mem_map.map[i].size); | |
354 | ||
e452e94e AN |
355 | if (start <= min_low_pfn) |
356 | start = min_low_pfn; | |
cce335ae RB |
357 | if (start >= end) |
358 | continue; | |
359 | ||
360 | #ifndef CONFIG_HIGHMEM | |
361 | if (end > max_low_pfn) | |
362 | end = max_low_pfn; | |
363 | ||
364 | /* | |
365 | * ... finally, is the area going away? | |
366 | */ | |
367 | if (end <= start) | |
368 | continue; | |
369 | #endif | |
370 | ||
371 | add_active_range(0, start, end); | |
372 | } | |
373 | ||
1da177e4 LT |
374 | /* |
375 | * Register fully available low RAM pages with the bootmem allocator. | |
376 | */ | |
377 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
b6f1f0de | 378 | unsigned long start, end, size; |
1da177e4 LT |
379 | |
380 | /* | |
381 | * Reserve usable memory. | |
382 | */ | |
383 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
384 | continue; | |
385 | ||
b6f1f0de FBH |
386 | start = PFN_UP(boot_mem_map.map[i].addr); |
387 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
1da177e4 | 388 | + boot_mem_map.map[i].size); |
1da177e4 | 389 | /* |
b6f1f0de FBH |
390 | * We are rounding up the start address of usable memory |
391 | * and at the end of the usable range downwards. | |
1da177e4 | 392 | */ |
b6f1f0de | 393 | if (start >= max_low_pfn) |
1da177e4 | 394 | continue; |
b6f1f0de FBH |
395 | if (start < reserved_end) |
396 | start = reserved_end; | |
397 | if (end > max_low_pfn) | |
398 | end = max_low_pfn; | |
1da177e4 LT |
399 | |
400 | /* | |
b6f1f0de | 401 | * ... finally, is the area going away? |
1da177e4 | 402 | */ |
b6f1f0de | 403 | if (end <= start) |
1da177e4 | 404 | continue; |
b6f1f0de | 405 | size = end - start; |
1da177e4 LT |
406 | |
407 | /* Register lowmem ranges */ | |
b6f1f0de FBH |
408 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
409 | memory_present(0, start, end); | |
1da177e4 LT |
410 | } |
411 | ||
b6f1f0de FBH |
412 | /* |
413 | * Reserve the bootmap memory. | |
414 | */ | |
415 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size); | |
416 | ||
d2043ca8 FBH |
417 | /* |
418 | * Reserve initrd memory if needed. | |
419 | */ | |
420 | finalize_initrd(); | |
1da177e4 LT |
421 | } |
422 | ||
d2043ca8 FBH |
423 | #endif /* CONFIG_SGI_IP27 */ |
424 | ||
2925aba4 RB |
425 | /* |
426 | * arch_mem_init - initialize memory managment subsystem | |
427 | * | |
428 | * o plat_mem_setup() detects the memory configuration and will record detected | |
429 | * memory areas using add_memory_region. | |
2925aba4 RB |
430 | * |
431 | * At this stage the memory configuration of the system is known to the | |
432 | * kernel but generic memory managment system is still entirely uninitialized. | |
433 | * | |
434 | * o bootmem_init() | |
435 | * o sparse_init() | |
436 | * o paging_init() | |
437 | * | |
438 | * At this stage the bootmem allocator is ready to use. | |
439 | * | |
440 | * NOTE: historically plat_mem_setup did the entire platform initialization. | |
441 | * This was rather impractical because it meant plat_mem_setup had to | |
442 | * get away without any kind of memory allocator. To keep old code from | |
443 | * breaking plat_setup was just renamed to plat_setup and a second platform | |
444 | * initialization hook for anything else was introduced. | |
445 | */ | |
446 | ||
a09fc446 FBH |
447 | static int usermem __initdata = 0; |
448 | ||
449 | static int __init early_parse_mem(char *p) | |
450 | { | |
451 | unsigned long start, size; | |
452 | ||
453 | /* | |
454 | * If a user specifies memory size, we | |
455 | * blow away any automatically generated | |
456 | * size. | |
457 | */ | |
458 | if (usermem == 0) { | |
459 | boot_mem_map.nr_map = 0; | |
460 | usermem = 1; | |
461 | } | |
462 | start = 0; | |
463 | size = memparse(p, &p); | |
464 | if (*p == '@') | |
465 | start = memparse(p + 1, &p); | |
466 | ||
467 | add_memory_region(start, size, BOOT_MEM_RAM); | |
468 | return 0; | |
469 | } | |
470 | early_param("mem", early_parse_mem); | |
2925aba4 RB |
471 | |
472 | static void __init arch_mem_init(char **cmdline_p) | |
473 | { | |
a09fc446 FBH |
474 | extern void plat_mem_setup(void); |
475 | ||
2925aba4 RB |
476 | /* call board setup routine */ |
477 | plat_mem_setup(); | |
478 | ||
a09fc446 FBH |
479 | printk("Determined physical RAM map:\n"); |
480 | print_memory_map(); | |
481 | ||
2925aba4 | 482 | strlcpy(command_line, arcs_cmdline, sizeof(command_line)); |
43cd3464 | 483 | strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); |
2925aba4 RB |
484 | |
485 | *cmdline_p = command_line; | |
486 | ||
a09fc446 FBH |
487 | parse_early_param(); |
488 | ||
489 | if (usermem) { | |
490 | printk("User-defined physical RAM map:\n"); | |
491 | print_memory_map(); | |
492 | } | |
493 | ||
2925aba4 RB |
494 | bootmem_init(); |
495 | sparse_init(); | |
496 | paging_init(); | |
497 | } | |
498 | ||
8df32c63 | 499 | static void __init resource_init(void) |
1da177e4 LT |
500 | { |
501 | int i; | |
502 | ||
6adb5fe7 RB |
503 | if (UNCAC_BASE != IO_BASE) |
504 | return; | |
505 | ||
f5bffe3a FBH |
506 | code_resource.start = __pa_symbol(&_text); |
507 | code_resource.end = __pa_symbol(&_etext) - 1; | |
508 | data_resource.start = __pa_symbol(&_etext); | |
509 | data_resource.end = __pa_symbol(&_edata) - 1; | |
1da177e4 LT |
510 | |
511 | /* | |
512 | * Request address space for all standard RAM. | |
513 | */ | |
514 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
515 | struct resource *res; | |
516 | unsigned long start, end; | |
517 | ||
518 | start = boot_mem_map.map[i].addr; | |
519 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; | |
1c6fd44d | 520 | if (start >= HIGHMEM_START) |
1da177e4 | 521 | continue; |
1c6fd44d FBH |
522 | if (end >= HIGHMEM_START) |
523 | end = HIGHMEM_START - 1; | |
1da177e4 LT |
524 | |
525 | res = alloc_bootmem(sizeof(struct resource)); | |
526 | switch (boot_mem_map.map[i].type) { | |
527 | case BOOT_MEM_RAM: | |
528 | case BOOT_MEM_ROM_DATA: | |
529 | res->name = "System RAM"; | |
530 | break; | |
531 | case BOOT_MEM_RESERVED: | |
532 | default: | |
533 | res->name = "reserved"; | |
534 | } | |
535 | ||
536 | res->start = start; | |
537 | res->end = end; | |
538 | ||
539 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
540 | request_resource(&iomem_resource, res); | |
541 | ||
542 | /* | |
543 | * We don't know which RAM region contains kernel data, | |
544 | * so we try it repeatedly and let the resource manager | |
545 | * test it. | |
546 | */ | |
547 | request_resource(res, &code_resource); | |
548 | request_resource(res, &data_resource); | |
549 | } | |
550 | } | |
551 | ||
1da177e4 LT |
552 | void __init setup_arch(char **cmdline_p) |
553 | { | |
554 | cpu_probe(); | |
555 | prom_init(); | |
36a88530 RB |
556 | |
557 | #ifdef CONFIG_EARLY_PRINTK | |
558 | { | |
559 | extern void setup_early_printk(void); | |
560 | ||
561 | setup_early_printk(); | |
562 | } | |
563 | #endif | |
1da177e4 | 564 | cpu_report(); |
20d60d99 | 565 | check_bugs_early(); |
1da177e4 LT |
566 | |
567 | #if defined(CONFIG_VT) | |
568 | #if defined(CONFIG_VGA_CONSOLE) | |
e0daad44 | 569 | conswitchp = &vga_con; |
1da177e4 | 570 | #elif defined(CONFIG_DUMMY_CONSOLE) |
e0daad44 | 571 | conswitchp = &dummy_con; |
1da177e4 LT |
572 | #endif |
573 | #endif | |
574 | ||
2925aba4 | 575 | arch_mem_init(cmdline_p); |
1da177e4 | 576 | |
1da177e4 | 577 | resource_init(); |
9b6695a8 RB |
578 | #ifdef CONFIG_SMP |
579 | plat_smp_setup(); | |
580 | #endif | |
1da177e4 LT |
581 | } |
582 | ||
f49a747c | 583 | static int __init fpu_disable(char *s) |
1da177e4 | 584 | { |
f088fc84 RB |
585 | int i; |
586 | ||
587 | for (i = 0; i < NR_CPUS; i++) | |
588 | cpu_data[i].options &= ~MIPS_CPU_FPU; | |
1da177e4 LT |
589 | |
590 | return 1; | |
591 | } | |
592 | ||
593 | __setup("nofpu", fpu_disable); | |
e50c0a8f | 594 | |
f49a747c | 595 | static int __init dsp_disable(char *s) |
e50c0a8f RB |
596 | { |
597 | cpu_data[0].ases &= ~MIPS_ASE_DSP; | |
598 | ||
599 | return 1; | |
600 | } | |
601 | ||
602 | __setup("nodsp", dsp_disable); | |
69a6c312 AN |
603 | |
604 | unsigned long kernelsp[NR_CPUS]; | |
605 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; | |
6312e0ee AN |
606 | |
607 | #ifdef CONFIG_DEBUG_FS | |
608 | struct dentry *mips_debugfs_dir; | |
609 | static int __init debugfs_mips(void) | |
610 | { | |
611 | struct dentry *d; | |
612 | ||
613 | d = debugfs_create_dir("mips", NULL); | |
614 | if (IS_ERR(d)) | |
615 | return PTR_ERR(d); | |
616 | mips_debugfs_dir = d; | |
617 | return 0; | |
618 | } | |
619 | arch_initcall(debugfs_mips); | |
620 | #endif |