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Commit | Line | Data |
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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> | |
87353d8a | 32 | #include <asm/smp-ops.h> |
1da177e4 LT |
33 | #include <asm/system.h> |
34 | ||
ec74e361 | 35 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
1da177e4 LT |
36 | |
37 | EXPORT_SYMBOL(cpu_data); | |
38 | ||
39 | #ifdef CONFIG_VT | |
40 | struct screen_info screen_info; | |
41 | #endif | |
42 | ||
43 | /* | |
44 | * Despite it's name this variable is even if we don't have PCI | |
45 | */ | |
46 | unsigned int PCI_DMA_BUS_IS_PHYS; | |
47 | ||
48 | EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS); | |
49 | ||
50 | /* | |
51 | * Setup information | |
52 | * | |
53 | * These are initialized so they are in the .data section | |
54 | */ | |
ec74e361 | 55 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
1da177e4 LT |
56 | |
57 | EXPORT_SYMBOL(mips_machtype); | |
1da177e4 LT |
58 | |
59 | struct boot_mem_map boot_mem_map; | |
60 | ||
61 | static char command_line[CL_SIZE]; | |
62 | char arcs_cmdline[CL_SIZE]=CONFIG_CMDLINE; | |
63 | ||
64 | /* | |
65 | * mips_io_port_base is the begin of the address space to which x86 style | |
66 | * I/O ports are mapped. | |
67 | */ | |
ec74e361 | 68 | const unsigned long mips_io_port_base __read_mostly = -1; |
1da177e4 LT |
69 | EXPORT_SYMBOL(mips_io_port_base); |
70 | ||
71 | /* | |
72 | * isa_slot_offset is the address where E(ISA) busaddress 0 is mapped | |
73 | * for the processor. | |
74 | */ | |
75 | unsigned long isa_slot_offset; | |
76 | EXPORT_SYMBOL(isa_slot_offset); | |
77 | ||
78 | static struct resource code_resource = { .name = "Kernel code", }; | |
79 | static struct resource data_resource = { .name = "Kernel data", }; | |
80 | ||
81 | void __init add_memory_region(phys_t start, phys_t size, long type) | |
82 | { | |
83 | int x = boot_mem_map.nr_map; | |
84 | struct boot_mem_map_entry *prev = boot_mem_map.map + x - 1; | |
85 | ||
b6f1f0de FBH |
86 | /* Sanity check */ |
87 | if (start + size < start) { | |
88 | printk("Trying to add an invalid memory region, skipped\n"); | |
89 | return; | |
90 | } | |
91 | ||
1da177e4 LT |
92 | /* |
93 | * Try to merge with previous entry if any. This is far less than | |
94 | * perfect but is sufficient for most real world cases. | |
95 | */ | |
96 | if (x && prev->addr + prev->size == start && prev->type == type) { | |
97 | prev->size += size; | |
98 | return; | |
99 | } | |
100 | ||
101 | if (x == BOOT_MEM_MAP_MAX) { | |
102 | printk("Ooops! Too many entries in the memory map!\n"); | |
103 | return; | |
104 | } | |
105 | ||
106 | boot_mem_map.map[x].addr = start; | |
107 | boot_mem_map.map[x].size = size; | |
108 | boot_mem_map.map[x].type = type; | |
109 | boot_mem_map.nr_map++; | |
110 | } | |
111 | ||
112 | static void __init print_memory_map(void) | |
113 | { | |
114 | int i; | |
115 | const int field = 2 * sizeof(unsigned long); | |
116 | ||
117 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
118 | printk(" memory: %0*Lx @ %0*Lx ", | |
119 | field, (unsigned long long) boot_mem_map.map[i].size, | |
120 | field, (unsigned long long) boot_mem_map.map[i].addr); | |
121 | ||
122 | switch (boot_mem_map.map[i].type) { | |
123 | case BOOT_MEM_RAM: | |
124 | printk("(usable)\n"); | |
125 | break; | |
126 | case BOOT_MEM_ROM_DATA: | |
127 | printk("(ROM data)\n"); | |
128 | break; | |
129 | case BOOT_MEM_RESERVED: | |
130 | printk("(reserved)\n"); | |
131 | break; | |
132 | default: | |
133 | printk("type %lu\n", boot_mem_map.map[i].type); | |
134 | break; | |
135 | } | |
136 | } | |
137 | } | |
138 | ||
d2043ca8 FBH |
139 | /* |
140 | * Manage initrd | |
141 | */ | |
142 | #ifdef CONFIG_BLK_DEV_INITRD | |
143 | ||
a09fc446 | 144 | static int __init rd_start_early(char *p) |
1da177e4 | 145 | { |
a09fc446 | 146 | unsigned long start = memparse(p, &p); |
1da177e4 | 147 | |
875d43e7 | 148 | #ifdef CONFIG_64BIT |
a7837b76 FBH |
149 | /* Guess if the sign extension was forgotten by bootloader */ |
150 | if (start < XKPHYS) | |
151 | start = (int)start; | |
1da177e4 | 152 | #endif |
a09fc446 FBH |
153 | initrd_start = start; |
154 | initrd_end += start; | |
a09fc446 FBH |
155 | return 0; |
156 | } | |
157 | early_param("rd_start", rd_start_early); | |
158 | ||
159 | static int __init rd_size_early(char *p) | |
160 | { | |
161 | initrd_end += memparse(p, &p); | |
1da177e4 LT |
162 | return 0; |
163 | } | |
a09fc446 | 164 | early_param("rd_size", rd_size_early); |
1da177e4 | 165 | |
a7837b76 | 166 | /* it returns the next free pfn after initrd */ |
d2043ca8 FBH |
167 | static unsigned long __init init_initrd(void) |
168 | { | |
a7837b76 | 169 | unsigned long end; |
d2043ca8 FBH |
170 | u32 *initrd_header; |
171 | ||
d2043ca8 | 172 | /* |
a09fc446 FBH |
173 | * Board specific code or command line parser should have |
174 | * already set up initrd_start and initrd_end. In these cases | |
175 | * perfom sanity checks and use them if all looks good. | |
d2043ca8 | 176 | */ |
a7837b76 FBH |
177 | if (initrd_start && initrd_end > initrd_start) |
178 | goto sanitize; | |
179 | ||
180 | /* | |
181 | * See if initrd has been added to the kernel image by | |
182 | * arch/mips/boot/addinitrd.c. In that case a header is | |
183 | * prepended to initrd and is made up by 8 bytes. The fisrt | |
184 | * word is a magic number and the second one is the size of | |
185 | * initrd. Initrd start must be page aligned in any cases. | |
186 | */ | |
187 | initrd_header = __va(PAGE_ALIGN(__pa_symbol(&_end) + 8)) - 8; | |
188 | if (initrd_header[0] != 0x494E5244) | |
189 | goto disable; | |
190 | initrd_start = (unsigned long)(initrd_header + 2); | |
191 | initrd_end = initrd_start + initrd_header[1]; | |
192 | ||
193 | sanitize: | |
194 | if (initrd_start & ~PAGE_MASK) { | |
195 | printk(KERN_ERR "initrd start must be page aligned\n"); | |
196 | goto disable; | |
d2043ca8 | 197 | } |
a7837b76 FBH |
198 | if (initrd_start < PAGE_OFFSET) { |
199 | printk(KERN_ERR "initrd start < PAGE_OFFSET\n"); | |
200 | goto disable; | |
201 | } | |
202 | ||
203 | /* | |
204 | * Sanitize initrd addresses. For example firmware | |
205 | * can't guess if they need to pass them through | |
206 | * 64-bits values if the kernel has been built in pure | |
207 | * 32-bit. We need also to switch from KSEG0 to XKPHYS | |
208 | * addresses now, so the code can now safely use __pa(). | |
209 | */ | |
210 | end = __pa(initrd_end); | |
211 | initrd_end = (unsigned long)__va(end); | |
212 | initrd_start = (unsigned long)__va(__pa(initrd_start)); | |
213 | ||
214 | ROOT_DEV = Root_RAM0; | |
215 | return PFN_UP(end); | |
216 | disable: | |
217 | initrd_start = 0; | |
218 | initrd_end = 0; | |
219 | return 0; | |
d2043ca8 FBH |
220 | } |
221 | ||
222 | static void __init finalize_initrd(void) | |
223 | { | |
224 | unsigned long size = initrd_end - initrd_start; | |
225 | ||
226 | if (size == 0) { | |
227 | printk(KERN_INFO "Initrd not found or empty"); | |
228 | goto disable; | |
229 | } | |
d4df6d4e | 230 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
d2043ca8 FBH |
231 | printk("Initrd extends beyond end of memory"); |
232 | goto disable; | |
233 | } | |
234 | ||
72a7fe39 | 235 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
d2043ca8 FBH |
236 | initrd_below_start_ok = 1; |
237 | ||
238 | printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n", | |
239 | initrd_start, size); | |
240 | return; | |
241 | disable: | |
242 | printk(" - disabling initrd\n"); | |
243 | initrd_start = 0; | |
244 | initrd_end = 0; | |
245 | } | |
246 | ||
247 | #else /* !CONFIG_BLK_DEV_INITRD */ | |
248 | ||
9ba126cf RB |
249 | static unsigned long __init init_initrd(void) |
250 | { | |
251 | return 0; | |
252 | } | |
253 | ||
d2043ca8 FBH |
254 | #define finalize_initrd() do {} while (0) |
255 | ||
256 | #endif | |
257 | ||
b6f1f0de FBH |
258 | /* |
259 | * Initialize the bootmem allocator. It also setup initrd related data | |
260 | * if needed. | |
261 | */ | |
d2043ca8 FBH |
262 | #ifdef CONFIG_SGI_IP27 |
263 | ||
b6f1f0de | 264 | static void __init bootmem_init(void) |
1da177e4 | 265 | { |
d2043ca8 FBH |
266 | init_initrd(); |
267 | finalize_initrd(); | |
268 | } | |
269 | ||
270 | #else /* !CONFIG_SGI_IP27 */ | |
271 | ||
272 | static void __init bootmem_init(void) | |
273 | { | |
e452e94e | 274 | unsigned long reserved_end; |
db84dc61 | 275 | unsigned long mapstart = ~0UL; |
1da177e4 LT |
276 | unsigned long bootmap_size; |
277 | int i; | |
1da177e4 LT |
278 | |
279 | /* | |
d2043ca8 FBH |
280 | * Init any data related to initrd. It's a nop if INITRD is |
281 | * not selected. Once that done we can determine the low bound | |
282 | * of usable memory. | |
1da177e4 | 283 | */ |
a7837b76 | 284 | reserved_end = max(init_initrd(), PFN_UP(__pa_symbol(&_end))); |
1da177e4 | 285 | |
db84dc61 FBH |
286 | /* |
287 | * max_low_pfn is not a number of pages. The number of pages | |
288 | * of the system is given by 'max_low_pfn - min_low_pfn'. | |
289 | */ | |
290 | min_low_pfn = ~0UL; | |
291 | max_low_pfn = 0; | |
292 | ||
b6f1f0de FBH |
293 | /* |
294 | * Find the highest page frame number we have available. | |
295 | */ | |
1da177e4 LT |
296 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
297 | unsigned long start, end; | |
298 | ||
299 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
300 | continue; | |
301 | ||
302 | start = PFN_UP(boot_mem_map.map[i].addr); | |
303 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
b6f1f0de | 304 | + boot_mem_map.map[i].size); |
1da177e4 | 305 | |
db84dc61 FBH |
306 | if (end > max_low_pfn) |
307 | max_low_pfn = end; | |
308 | if (start < min_low_pfn) | |
309 | min_low_pfn = start; | |
b6f1f0de | 310 | if (end <= reserved_end) |
1da177e4 | 311 | continue; |
b6f1f0de FBH |
312 | if (start >= mapstart) |
313 | continue; | |
314 | mapstart = max(reserved_end, start); | |
1da177e4 LT |
315 | } |
316 | ||
db84dc61 FBH |
317 | if (min_low_pfn >= max_low_pfn) |
318 | panic("Incorrect memory mapping !!!"); | |
6f284a2c | 319 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
db84dc61 FBH |
320 | printk(KERN_INFO |
321 | "Wasting %lu bytes for tracking %lu unused pages\n", | |
6f284a2c FBH |
322 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), |
323 | min_low_pfn - ARCH_PFN_OFFSET); | |
324 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { | |
325 | printk(KERN_INFO | |
326 | "%lu free pages won't be used\n", | |
327 | ARCH_PFN_OFFSET - min_low_pfn); | |
db84dc61 | 328 | } |
6f284a2c | 329 | min_low_pfn = ARCH_PFN_OFFSET; |
db84dc61 | 330 | |
1da177e4 LT |
331 | /* |
332 | * Determine low and high memory ranges | |
333 | */ | |
db84dc61 | 334 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
b6f1f0de FBH |
335 | #ifdef CONFIG_HIGHMEM |
336 | highstart_pfn = PFN_DOWN(HIGHMEM_START); | |
db84dc61 | 337 | highend_pfn = max_low_pfn; |
1da177e4 | 338 | #endif |
db84dc61 | 339 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
1da177e4 LT |
340 | } |
341 | ||
1da177e4 | 342 | /* |
b6f1f0de | 343 | * Initialize the boot-time allocator with low memory only. |
1da177e4 | 344 | */ |
db84dc61 FBH |
345 | bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, |
346 | min_low_pfn, max_low_pfn); | |
cce335ae RB |
347 | |
348 | ||
cce335ae RB |
349 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
350 | unsigned long start, end; | |
351 | ||
352 | start = PFN_UP(boot_mem_map.map[i].addr); | |
353 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
354 | + boot_mem_map.map[i].size); | |
355 | ||
e452e94e AN |
356 | if (start <= min_low_pfn) |
357 | start = min_low_pfn; | |
cce335ae RB |
358 | if (start >= end) |
359 | continue; | |
360 | ||
361 | #ifndef CONFIG_HIGHMEM | |
362 | if (end > max_low_pfn) | |
363 | end = max_low_pfn; | |
364 | ||
365 | /* | |
366 | * ... finally, is the area going away? | |
367 | */ | |
368 | if (end <= start) | |
369 | continue; | |
370 | #endif | |
371 | ||
372 | add_active_range(0, start, end); | |
373 | } | |
374 | ||
1da177e4 LT |
375 | /* |
376 | * Register fully available low RAM pages with the bootmem allocator. | |
377 | */ | |
378 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
b6f1f0de | 379 | unsigned long start, end, size; |
1da177e4 LT |
380 | |
381 | /* | |
382 | * Reserve usable memory. | |
383 | */ | |
384 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
385 | continue; | |
386 | ||
b6f1f0de FBH |
387 | start = PFN_UP(boot_mem_map.map[i].addr); |
388 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
1da177e4 | 389 | + boot_mem_map.map[i].size); |
1da177e4 | 390 | /* |
b6f1f0de FBH |
391 | * We are rounding up the start address of usable memory |
392 | * and at the end of the usable range downwards. | |
1da177e4 | 393 | */ |
b6f1f0de | 394 | if (start >= max_low_pfn) |
1da177e4 | 395 | continue; |
b6f1f0de FBH |
396 | if (start < reserved_end) |
397 | start = reserved_end; | |
398 | if (end > max_low_pfn) | |
399 | end = max_low_pfn; | |
1da177e4 LT |
400 | |
401 | /* | |
b6f1f0de | 402 | * ... finally, is the area going away? |
1da177e4 | 403 | */ |
b6f1f0de | 404 | if (end <= start) |
1da177e4 | 405 | continue; |
b6f1f0de | 406 | size = end - start; |
1da177e4 LT |
407 | |
408 | /* Register lowmem ranges */ | |
b6f1f0de FBH |
409 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
410 | memory_present(0, start, end); | |
1da177e4 LT |
411 | } |
412 | ||
b6f1f0de FBH |
413 | /* |
414 | * Reserve the bootmap memory. | |
415 | */ | |
72a7fe39 | 416 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT); |
b6f1f0de | 417 | |
d2043ca8 FBH |
418 | /* |
419 | * Reserve initrd memory if needed. | |
420 | */ | |
421 | finalize_initrd(); | |
1da177e4 LT |
422 | } |
423 | ||
d2043ca8 FBH |
424 | #endif /* CONFIG_SGI_IP27 */ |
425 | ||
2925aba4 | 426 | /* |
603e82ed | 427 | * arch_mem_init - initialize memory management subsystem |
2925aba4 RB |
428 | * |
429 | * o plat_mem_setup() detects the memory configuration and will record detected | |
430 | * memory areas using add_memory_region. | |
2925aba4 RB |
431 | * |
432 | * At this stage the memory configuration of the system is known to the | |
603e82ed | 433 | * kernel but generic memory management system is still entirely uninitialized. |
2925aba4 RB |
434 | * |
435 | * o bootmem_init() | |
436 | * o sparse_init() | |
437 | * o paging_init() | |
438 | * | |
439 | * At this stage the bootmem allocator is ready to use. | |
440 | * | |
441 | * NOTE: historically plat_mem_setup did the entire platform initialization. | |
442 | * This was rather impractical because it meant plat_mem_setup had to | |
443 | * get away without any kind of memory allocator. To keep old code from | |
444 | * breaking plat_setup was just renamed to plat_setup and a second platform | |
445 | * initialization hook for anything else was introduced. | |
446 | */ | |
447 | ||
a09fc446 FBH |
448 | static int usermem __initdata = 0; |
449 | ||
450 | static int __init early_parse_mem(char *p) | |
451 | { | |
452 | unsigned long start, size; | |
453 | ||
454 | /* | |
455 | * If a user specifies memory size, we | |
456 | * blow away any automatically generated | |
457 | * size. | |
458 | */ | |
459 | if (usermem == 0) { | |
460 | boot_mem_map.nr_map = 0; | |
461 | usermem = 1; | |
462 | } | |
463 | start = 0; | |
464 | size = memparse(p, &p); | |
465 | if (*p == '@') | |
466 | start = memparse(p + 1, &p); | |
467 | ||
468 | add_memory_region(start, size, BOOT_MEM_RAM); | |
469 | return 0; | |
470 | } | |
471 | early_param("mem", early_parse_mem); | |
2925aba4 RB |
472 | |
473 | static void __init arch_mem_init(char **cmdline_p) | |
474 | { | |
a09fc446 FBH |
475 | extern void plat_mem_setup(void); |
476 | ||
2925aba4 RB |
477 | /* call board setup routine */ |
478 | plat_mem_setup(); | |
479 | ||
a09fc446 FBH |
480 | printk("Determined physical RAM map:\n"); |
481 | print_memory_map(); | |
482 | ||
2925aba4 | 483 | strlcpy(command_line, arcs_cmdline, sizeof(command_line)); |
43cd3464 | 484 | strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); |
2925aba4 RB |
485 | |
486 | *cmdline_p = command_line; | |
487 | ||
a09fc446 FBH |
488 | parse_early_param(); |
489 | ||
490 | if (usermem) { | |
491 | printk("User-defined physical RAM map:\n"); | |
492 | print_memory_map(); | |
493 | } | |
494 | ||
2925aba4 RB |
495 | bootmem_init(); |
496 | sparse_init(); | |
497 | paging_init(); | |
498 | } | |
499 | ||
8df32c63 | 500 | static void __init resource_init(void) |
1da177e4 LT |
501 | { |
502 | int i; | |
503 | ||
6adb5fe7 RB |
504 | if (UNCAC_BASE != IO_BASE) |
505 | return; | |
506 | ||
f5bffe3a FBH |
507 | code_resource.start = __pa_symbol(&_text); |
508 | code_resource.end = __pa_symbol(&_etext) - 1; | |
509 | data_resource.start = __pa_symbol(&_etext); | |
510 | data_resource.end = __pa_symbol(&_edata) - 1; | |
1da177e4 LT |
511 | |
512 | /* | |
513 | * Request address space for all standard RAM. | |
514 | */ | |
515 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
516 | struct resource *res; | |
517 | unsigned long start, end; | |
518 | ||
519 | start = boot_mem_map.map[i].addr; | |
520 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; | |
1c6fd44d | 521 | if (start >= HIGHMEM_START) |
1da177e4 | 522 | continue; |
1c6fd44d FBH |
523 | if (end >= HIGHMEM_START) |
524 | end = HIGHMEM_START - 1; | |
1da177e4 LT |
525 | |
526 | res = alloc_bootmem(sizeof(struct resource)); | |
527 | switch (boot_mem_map.map[i].type) { | |
528 | case BOOT_MEM_RAM: | |
529 | case BOOT_MEM_ROM_DATA: | |
530 | res->name = "System RAM"; | |
531 | break; | |
532 | case BOOT_MEM_RESERVED: | |
533 | default: | |
534 | res->name = "reserved"; | |
535 | } | |
536 | ||
537 | res->start = start; | |
538 | res->end = end; | |
539 | ||
540 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
541 | request_resource(&iomem_resource, res); | |
542 | ||
543 | /* | |
544 | * We don't know which RAM region contains kernel data, | |
545 | * so we try it repeatedly and let the resource manager | |
546 | * test it. | |
547 | */ | |
548 | request_resource(res, &code_resource); | |
549 | request_resource(res, &data_resource); | |
550 | } | |
551 | } | |
552 | ||
1da177e4 LT |
553 | void __init setup_arch(char **cmdline_p) |
554 | { | |
555 | cpu_probe(); | |
556 | prom_init(); | |
36a88530 RB |
557 | |
558 | #ifdef CONFIG_EARLY_PRINTK | |
559 | { | |
560 | extern void setup_early_printk(void); | |
561 | ||
562 | setup_early_printk(); | |
563 | } | |
564 | #endif | |
1da177e4 | 565 | cpu_report(); |
20d60d99 | 566 | check_bugs_early(); |
1da177e4 LT |
567 | |
568 | #if defined(CONFIG_VT) | |
569 | #if defined(CONFIG_VGA_CONSOLE) | |
e0daad44 | 570 | conswitchp = &vga_con; |
1da177e4 | 571 | #elif defined(CONFIG_DUMMY_CONSOLE) |
e0daad44 | 572 | conswitchp = &dummy_con; |
1da177e4 LT |
573 | #endif |
574 | #endif | |
575 | ||
2925aba4 | 576 | arch_mem_init(cmdline_p); |
1da177e4 | 577 | |
1da177e4 | 578 | resource_init(); |
9b6695a8 | 579 | plat_smp_setup(); |
1da177e4 LT |
580 | } |
581 | ||
f49a747c | 582 | static int __init fpu_disable(char *s) |
1da177e4 | 583 | { |
f088fc84 RB |
584 | int i; |
585 | ||
586 | for (i = 0; i < NR_CPUS; i++) | |
587 | cpu_data[i].options &= ~MIPS_CPU_FPU; | |
1da177e4 LT |
588 | |
589 | return 1; | |
590 | } | |
591 | ||
592 | __setup("nofpu", fpu_disable); | |
e50c0a8f | 593 | |
f49a747c | 594 | static int __init dsp_disable(char *s) |
e50c0a8f RB |
595 | { |
596 | cpu_data[0].ases &= ~MIPS_ASE_DSP; | |
597 | ||
598 | return 1; | |
599 | } | |
600 | ||
601 | __setup("nodsp", dsp_disable); | |
69a6c312 AN |
602 | |
603 | unsigned long kernelsp[NR_CPUS]; | |
604 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; | |
6312e0ee AN |
605 | |
606 | #ifdef CONFIG_DEBUG_FS | |
607 | struct dentry *mips_debugfs_dir; | |
608 | static int __init debugfs_mips(void) | |
609 | { | |
610 | struct dentry *d; | |
611 | ||
612 | d = debugfs_create_dir("mips", NULL); | |
613 | if (IS_ERR(d)) | |
614 | return PTR_ERR(d); | |
615 | mips_debugfs_dir = d; | |
616 | return 0; | |
617 | } | |
618 | arch_initcall(debugfs_mips); | |
619 | #endif |