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 | ||
1da177e4 LT |
71 | static struct resource code_resource = { .name = "Kernel code", }; |
72 | static struct resource data_resource = { .name = "Kernel data", }; | |
73 | ||
74 | void __init add_memory_region(phys_t start, phys_t size, long type) | |
75 | { | |
76 | int x = boot_mem_map.nr_map; | |
77 | struct boot_mem_map_entry *prev = boot_mem_map.map + x - 1; | |
78 | ||
b6f1f0de FBH |
79 | /* Sanity check */ |
80 | if (start + size < start) { | |
a64ae7a2 | 81 | pr_warning("Trying to add an invalid memory region, skipped\n"); |
b6f1f0de FBH |
82 | return; |
83 | } | |
84 | ||
1da177e4 LT |
85 | /* |
86 | * Try to merge with previous entry if any. This is far less than | |
87 | * perfect but is sufficient for most real world cases. | |
88 | */ | |
89 | if (x && prev->addr + prev->size == start && prev->type == type) { | |
90 | prev->size += size; | |
91 | return; | |
92 | } | |
93 | ||
94 | if (x == BOOT_MEM_MAP_MAX) { | |
a64ae7a2 | 95 | pr_err("Ooops! Too many entries in the memory map!\n"); |
1da177e4 LT |
96 | return; |
97 | } | |
98 | ||
99 | boot_mem_map.map[x].addr = start; | |
100 | boot_mem_map.map[x].size = size; | |
101 | boot_mem_map.map[x].type = type; | |
102 | boot_mem_map.nr_map++; | |
103 | } | |
104 | ||
105 | static void __init print_memory_map(void) | |
106 | { | |
107 | int i; | |
108 | const int field = 2 * sizeof(unsigned long); | |
109 | ||
110 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
a64ae7a2 | 111 | printk(KERN_INFO " memory: %0*Lx @ %0*Lx ", |
1da177e4 LT |
112 | field, (unsigned long long) boot_mem_map.map[i].size, |
113 | field, (unsigned long long) boot_mem_map.map[i].addr); | |
114 | ||
115 | switch (boot_mem_map.map[i].type) { | |
116 | case BOOT_MEM_RAM: | |
a64ae7a2 | 117 | printk(KERN_CONT "(usable)\n"); |
1da177e4 LT |
118 | break; |
119 | case BOOT_MEM_ROM_DATA: | |
a64ae7a2 | 120 | printk(KERN_CONT "(ROM data)\n"); |
1da177e4 LT |
121 | break; |
122 | case BOOT_MEM_RESERVED: | |
a64ae7a2 | 123 | printk(KERN_CONT "(reserved)\n"); |
1da177e4 LT |
124 | break; |
125 | default: | |
a64ae7a2 | 126 | printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type); |
1da177e4 LT |
127 | break; |
128 | } | |
129 | } | |
130 | } | |
131 | ||
d2043ca8 FBH |
132 | /* |
133 | * Manage initrd | |
134 | */ | |
135 | #ifdef CONFIG_BLK_DEV_INITRD | |
136 | ||
a09fc446 | 137 | static int __init rd_start_early(char *p) |
1da177e4 | 138 | { |
a09fc446 | 139 | unsigned long start = memparse(p, &p); |
1da177e4 | 140 | |
875d43e7 | 141 | #ifdef CONFIG_64BIT |
a7837b76 FBH |
142 | /* Guess if the sign extension was forgotten by bootloader */ |
143 | if (start < XKPHYS) | |
144 | start = (int)start; | |
1da177e4 | 145 | #endif |
a09fc446 FBH |
146 | initrd_start = start; |
147 | initrd_end += start; | |
a09fc446 FBH |
148 | return 0; |
149 | } | |
150 | early_param("rd_start", rd_start_early); | |
151 | ||
152 | static int __init rd_size_early(char *p) | |
153 | { | |
154 | initrd_end += memparse(p, &p); | |
1da177e4 LT |
155 | return 0; |
156 | } | |
a09fc446 | 157 | early_param("rd_size", rd_size_early); |
1da177e4 | 158 | |
a7837b76 | 159 | /* it returns the next free pfn after initrd */ |
d2043ca8 FBH |
160 | static unsigned long __init init_initrd(void) |
161 | { | |
a7837b76 | 162 | unsigned long end; |
d2043ca8 | 163 | |
d2043ca8 | 164 | /* |
a09fc446 FBH |
165 | * Board specific code or command line parser should have |
166 | * already set up initrd_start and initrd_end. In these cases | |
167 | * perfom sanity checks and use them if all looks good. | |
d2043ca8 | 168 | */ |
0011036b AN |
169 | if (!initrd_start || initrd_end <= initrd_start) { |
170 | #ifdef CONFIG_PROBE_INITRD_HEADER | |
171 | u32 *initrd_header; | |
172 | ||
173 | /* | |
174 | * See if initrd has been added to the kernel image by | |
175 | * arch/mips/boot/addinitrd.c. In that case a header is | |
176 | * prepended to initrd and is made up by 8 bytes. The first | |
177 | * word is a magic number and the second one is the size of | |
178 | * initrd. Initrd start must be page aligned in any cases. | |
179 | */ | |
180 | initrd_header = __va(PAGE_ALIGN(__pa_symbol(&_end) + 8)) - 8; | |
181 | if (initrd_header[0] != 0x494E5244) | |
182 | goto disable; | |
183 | initrd_start = (unsigned long)(initrd_header + 2); | |
184 | initrd_end = initrd_start + initrd_header[1]; | |
185 | #else | |
a7837b76 | 186 | goto disable; |
0011036b AN |
187 | #endif |
188 | } | |
a7837b76 | 189 | |
a7837b76 | 190 | if (initrd_start & ~PAGE_MASK) { |
a64ae7a2 | 191 | pr_err("initrd start must be page aligned\n"); |
a7837b76 | 192 | goto disable; |
d2043ca8 | 193 | } |
a7837b76 | 194 | if (initrd_start < PAGE_OFFSET) { |
a64ae7a2 | 195 | pr_err("initrd start < PAGE_OFFSET\n"); |
a7837b76 FBH |
196 | goto disable; |
197 | } | |
198 | ||
199 | /* | |
200 | * Sanitize initrd addresses. For example firmware | |
201 | * can't guess if they need to pass them through | |
202 | * 64-bits values if the kernel has been built in pure | |
203 | * 32-bit. We need also to switch from KSEG0 to XKPHYS | |
204 | * addresses now, so the code can now safely use __pa(). | |
205 | */ | |
206 | end = __pa(initrd_end); | |
207 | initrd_end = (unsigned long)__va(end); | |
208 | initrd_start = (unsigned long)__va(__pa(initrd_start)); | |
209 | ||
210 | ROOT_DEV = Root_RAM0; | |
211 | return PFN_UP(end); | |
212 | disable: | |
213 | initrd_start = 0; | |
214 | initrd_end = 0; | |
215 | return 0; | |
d2043ca8 FBH |
216 | } |
217 | ||
218 | static void __init finalize_initrd(void) | |
219 | { | |
220 | unsigned long size = initrd_end - initrd_start; | |
221 | ||
222 | if (size == 0) { | |
223 | printk(KERN_INFO "Initrd not found or empty"); | |
224 | goto disable; | |
225 | } | |
d4df6d4e | 226 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
a64ae7a2 | 227 | printk(KERN_ERR "Initrd extends beyond end of memory"); |
d2043ca8 FBH |
228 | goto disable; |
229 | } | |
230 | ||
72a7fe39 | 231 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
d2043ca8 FBH |
232 | initrd_below_start_ok = 1; |
233 | ||
a64ae7a2 MC |
234 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
235 | initrd_start, size); | |
d2043ca8 FBH |
236 | return; |
237 | disable: | |
a64ae7a2 | 238 | printk(KERN_CONT " - disabling initrd\n"); |
d2043ca8 FBH |
239 | initrd_start = 0; |
240 | initrd_end = 0; | |
241 | } | |
242 | ||
243 | #else /* !CONFIG_BLK_DEV_INITRD */ | |
244 | ||
9ba126cf RB |
245 | static unsigned long __init init_initrd(void) |
246 | { | |
247 | return 0; | |
248 | } | |
249 | ||
d2043ca8 FBH |
250 | #define finalize_initrd() do {} while (0) |
251 | ||
252 | #endif | |
253 | ||
b6f1f0de FBH |
254 | /* |
255 | * Initialize the bootmem allocator. It also setup initrd related data | |
256 | * if needed. | |
257 | */ | |
d2043ca8 FBH |
258 | #ifdef CONFIG_SGI_IP27 |
259 | ||
b6f1f0de | 260 | static void __init bootmem_init(void) |
1da177e4 | 261 | { |
d2043ca8 FBH |
262 | init_initrd(); |
263 | finalize_initrd(); | |
264 | } | |
265 | ||
266 | #else /* !CONFIG_SGI_IP27 */ | |
267 | ||
268 | static void __init bootmem_init(void) | |
269 | { | |
e452e94e | 270 | unsigned long reserved_end; |
db84dc61 | 271 | unsigned long mapstart = ~0UL; |
1da177e4 LT |
272 | unsigned long bootmap_size; |
273 | int i; | |
1da177e4 LT |
274 | |
275 | /* | |
d2043ca8 FBH |
276 | * Init any data related to initrd. It's a nop if INITRD is |
277 | * not selected. Once that done we can determine the low bound | |
278 | * of usable memory. | |
1da177e4 | 279 | */ |
12e22e8e RB |
280 | reserved_end = max(init_initrd(), |
281 | (unsigned long) PFN_UP(__pa_symbol(&_end))); | |
1da177e4 | 282 | |
db84dc61 FBH |
283 | /* |
284 | * max_low_pfn is not a number of pages. The number of pages | |
285 | * of the system is given by 'max_low_pfn - min_low_pfn'. | |
286 | */ | |
287 | min_low_pfn = ~0UL; | |
288 | max_low_pfn = 0; | |
289 | ||
b6f1f0de FBH |
290 | /* |
291 | * Find the highest page frame number we have available. | |
292 | */ | |
1da177e4 LT |
293 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
294 | unsigned long start, end; | |
295 | ||
296 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
297 | continue; | |
298 | ||
299 | start = PFN_UP(boot_mem_map.map[i].addr); | |
300 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
b6f1f0de | 301 | + boot_mem_map.map[i].size); |
1da177e4 | 302 | |
db84dc61 FBH |
303 | if (end > max_low_pfn) |
304 | max_low_pfn = end; | |
305 | if (start < min_low_pfn) | |
306 | min_low_pfn = start; | |
b6f1f0de | 307 | if (end <= reserved_end) |
1da177e4 | 308 | continue; |
b6f1f0de FBH |
309 | if (start >= mapstart) |
310 | continue; | |
311 | mapstart = max(reserved_end, start); | |
1da177e4 LT |
312 | } |
313 | ||
db84dc61 FBH |
314 | if (min_low_pfn >= max_low_pfn) |
315 | panic("Incorrect memory mapping !!!"); | |
6f284a2c | 316 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
317 | pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
318 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), | |
319 | min_low_pfn - ARCH_PFN_OFFSET); | |
6f284a2c | 320 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
321 | pr_info("%lu free pages won't be used\n", |
322 | ARCH_PFN_OFFSET - min_low_pfn); | |
db84dc61 | 323 | } |
6f284a2c | 324 | min_low_pfn = ARCH_PFN_OFFSET; |
db84dc61 | 325 | |
1da177e4 LT |
326 | /* |
327 | * Determine low and high memory ranges | |
328 | */ | |
dc3bf353 | 329 | max_pfn = max_low_pfn; |
db84dc61 | 330 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
b6f1f0de FBH |
331 | #ifdef CONFIG_HIGHMEM |
332 | highstart_pfn = PFN_DOWN(HIGHMEM_START); | |
db84dc61 | 333 | highend_pfn = max_low_pfn; |
1da177e4 | 334 | #endif |
db84dc61 | 335 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
1da177e4 LT |
336 | } |
337 | ||
1da177e4 | 338 | /* |
b6f1f0de | 339 | * Initialize the boot-time allocator with low memory only. |
1da177e4 | 340 | */ |
db84dc61 FBH |
341 | bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, |
342 | min_low_pfn, max_low_pfn); | |
cce335ae RB |
343 | |
344 | ||
cce335ae RB |
345 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
346 | unsigned long start, end; | |
347 | ||
348 | start = PFN_UP(boot_mem_map.map[i].addr); | |
349 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
350 | + boot_mem_map.map[i].size); | |
351 | ||
e452e94e AN |
352 | if (start <= min_low_pfn) |
353 | start = min_low_pfn; | |
cce335ae RB |
354 | if (start >= end) |
355 | continue; | |
356 | ||
357 | #ifndef CONFIG_HIGHMEM | |
358 | if (end > max_low_pfn) | |
359 | end = max_low_pfn; | |
360 | ||
361 | /* | |
362 | * ... finally, is the area going away? | |
363 | */ | |
364 | if (end <= start) | |
365 | continue; | |
366 | #endif | |
367 | ||
368 | add_active_range(0, start, end); | |
369 | } | |
370 | ||
1da177e4 LT |
371 | /* |
372 | * Register fully available low RAM pages with the bootmem allocator. | |
373 | */ | |
374 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
b6f1f0de | 375 | unsigned long start, end, size; |
1da177e4 LT |
376 | |
377 | /* | |
378 | * Reserve usable memory. | |
379 | */ | |
380 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
381 | continue; | |
382 | ||
b6f1f0de FBH |
383 | start = PFN_UP(boot_mem_map.map[i].addr); |
384 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
1da177e4 | 385 | + boot_mem_map.map[i].size); |
1da177e4 | 386 | /* |
b6f1f0de FBH |
387 | * We are rounding up the start address of usable memory |
388 | * and at the end of the usable range downwards. | |
1da177e4 | 389 | */ |
b6f1f0de | 390 | if (start >= max_low_pfn) |
1da177e4 | 391 | continue; |
b6f1f0de FBH |
392 | if (start < reserved_end) |
393 | start = reserved_end; | |
394 | if (end > max_low_pfn) | |
395 | end = max_low_pfn; | |
1da177e4 LT |
396 | |
397 | /* | |
b6f1f0de | 398 | * ... finally, is the area going away? |
1da177e4 | 399 | */ |
b6f1f0de | 400 | if (end <= start) |
1da177e4 | 401 | continue; |
b6f1f0de | 402 | size = end - start; |
1da177e4 LT |
403 | |
404 | /* Register lowmem ranges */ | |
b6f1f0de FBH |
405 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
406 | memory_present(0, start, end); | |
1da177e4 LT |
407 | } |
408 | ||
b6f1f0de FBH |
409 | /* |
410 | * Reserve the bootmap memory. | |
411 | */ | |
72a7fe39 | 412 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT); |
b6f1f0de | 413 | |
d2043ca8 FBH |
414 | /* |
415 | * Reserve initrd memory if needed. | |
416 | */ | |
417 | finalize_initrd(); | |
1da177e4 LT |
418 | } |
419 | ||
d2043ca8 FBH |
420 | #endif /* CONFIG_SGI_IP27 */ |
421 | ||
2925aba4 | 422 | /* |
603e82ed | 423 | * arch_mem_init - initialize memory management subsystem |
2925aba4 RB |
424 | * |
425 | * o plat_mem_setup() detects the memory configuration and will record detected | |
426 | * memory areas using add_memory_region. | |
2925aba4 RB |
427 | * |
428 | * At this stage the memory configuration of the system is known to the | |
603e82ed | 429 | * kernel but generic memory management system is still entirely uninitialized. |
2925aba4 RB |
430 | * |
431 | * o bootmem_init() | |
432 | * o sparse_init() | |
433 | * o paging_init() | |
434 | * | |
435 | * At this stage the bootmem allocator is ready to use. | |
436 | * | |
437 | * NOTE: historically plat_mem_setup did the entire platform initialization. | |
438 | * This was rather impractical because it meant plat_mem_setup had to | |
439 | * get away without any kind of memory allocator. To keep old code from | |
440 | * breaking plat_setup was just renamed to plat_setup and a second platform | |
441 | * initialization hook for anything else was introduced. | |
442 | */ | |
443 | ||
982f6ffe | 444 | static int usermem __initdata; |
a09fc446 FBH |
445 | |
446 | static int __init early_parse_mem(char *p) | |
447 | { | |
448 | unsigned long start, size; | |
449 | ||
450 | /* | |
451 | * If a user specifies memory size, we | |
452 | * blow away any automatically generated | |
453 | * size. | |
454 | */ | |
455 | if (usermem == 0) { | |
456 | boot_mem_map.nr_map = 0; | |
457 | usermem = 1; | |
458 | } | |
459 | start = 0; | |
460 | size = memparse(p, &p); | |
461 | if (*p == '@') | |
462 | start = memparse(p + 1, &p); | |
463 | ||
464 | add_memory_region(start, size, BOOT_MEM_RAM); | |
465 | return 0; | |
466 | } | |
467 | early_param("mem", early_parse_mem); | |
2925aba4 RB |
468 | |
469 | static void __init arch_mem_init(char **cmdline_p) | |
470 | { | |
a09fc446 FBH |
471 | extern void plat_mem_setup(void); |
472 | ||
2925aba4 RB |
473 | /* call board setup routine */ |
474 | plat_mem_setup(); | |
475 | ||
a64ae7a2 | 476 | pr_info("Determined physical RAM map:\n"); |
a09fc446 FBH |
477 | print_memory_map(); |
478 | ||
2925aba4 | 479 | strlcpy(command_line, arcs_cmdline, sizeof(command_line)); |
43cd3464 | 480 | strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); |
2925aba4 RB |
481 | |
482 | *cmdline_p = command_line; | |
483 | ||
a09fc446 FBH |
484 | parse_early_param(); |
485 | ||
486 | if (usermem) { | |
a64ae7a2 | 487 | pr_info("User-defined physical RAM map:\n"); |
a09fc446 FBH |
488 | print_memory_map(); |
489 | } | |
490 | ||
2925aba4 RB |
491 | bootmem_init(); |
492 | sparse_init(); | |
493 | paging_init(); | |
494 | } | |
495 | ||
8df32c63 | 496 | static void __init resource_init(void) |
1da177e4 LT |
497 | { |
498 | int i; | |
499 | ||
6adb5fe7 RB |
500 | if (UNCAC_BASE != IO_BASE) |
501 | return; | |
502 | ||
f5bffe3a FBH |
503 | code_resource.start = __pa_symbol(&_text); |
504 | code_resource.end = __pa_symbol(&_etext) - 1; | |
505 | data_resource.start = __pa_symbol(&_etext); | |
506 | data_resource.end = __pa_symbol(&_edata) - 1; | |
1da177e4 LT |
507 | |
508 | /* | |
509 | * Request address space for all standard RAM. | |
510 | */ | |
511 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
512 | struct resource *res; | |
513 | unsigned long start, end; | |
514 | ||
515 | start = boot_mem_map.map[i].addr; | |
516 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; | |
1c6fd44d | 517 | if (start >= HIGHMEM_START) |
1da177e4 | 518 | continue; |
1c6fd44d FBH |
519 | if (end >= HIGHMEM_START) |
520 | end = HIGHMEM_START - 1; | |
1da177e4 LT |
521 | |
522 | res = alloc_bootmem(sizeof(struct resource)); | |
523 | switch (boot_mem_map.map[i].type) { | |
524 | case BOOT_MEM_RAM: | |
525 | case BOOT_MEM_ROM_DATA: | |
526 | res->name = "System RAM"; | |
527 | break; | |
528 | case BOOT_MEM_RESERVED: | |
529 | default: | |
530 | res->name = "reserved"; | |
531 | } | |
532 | ||
533 | res->start = start; | |
534 | res->end = end; | |
535 | ||
536 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
537 | request_resource(&iomem_resource, res); | |
538 | ||
539 | /* | |
540 | * We don't know which RAM region contains kernel data, | |
541 | * so we try it repeatedly and let the resource manager | |
542 | * test it. | |
543 | */ | |
544 | request_resource(res, &code_resource); | |
545 | request_resource(res, &data_resource); | |
546 | } | |
547 | } | |
548 | ||
1da177e4 LT |
549 | void __init setup_arch(char **cmdline_p) |
550 | { | |
551 | cpu_probe(); | |
552 | prom_init(); | |
36a88530 RB |
553 | |
554 | #ifdef CONFIG_EARLY_PRINTK | |
07cdb784 | 555 | setup_early_printk(); |
36a88530 | 556 | #endif |
1da177e4 | 557 | cpu_report(); |
20d60d99 | 558 | check_bugs_early(); |
1da177e4 LT |
559 | |
560 | #if defined(CONFIG_VT) | |
561 | #if defined(CONFIG_VGA_CONSOLE) | |
e0daad44 | 562 | conswitchp = &vga_con; |
1da177e4 | 563 | #elif defined(CONFIG_DUMMY_CONSOLE) |
e0daad44 | 564 | conswitchp = &dummy_con; |
1da177e4 LT |
565 | #endif |
566 | #endif | |
567 | ||
2925aba4 | 568 | arch_mem_init(cmdline_p); |
1da177e4 | 569 | |
1da177e4 | 570 | resource_init(); |
9b6695a8 | 571 | plat_smp_setup(); |
1da177e4 LT |
572 | } |
573 | ||
f49a747c | 574 | static int __init fpu_disable(char *s) |
1da177e4 | 575 | { |
f088fc84 RB |
576 | int i; |
577 | ||
578 | for (i = 0; i < NR_CPUS; i++) | |
579 | cpu_data[i].options &= ~MIPS_CPU_FPU; | |
1da177e4 LT |
580 | |
581 | return 1; | |
582 | } | |
583 | ||
584 | __setup("nofpu", fpu_disable); | |
e50c0a8f | 585 | |
f49a747c | 586 | static int __init dsp_disable(char *s) |
e50c0a8f RB |
587 | { |
588 | cpu_data[0].ases &= ~MIPS_ASE_DSP; | |
589 | ||
590 | return 1; | |
591 | } | |
592 | ||
593 | __setup("nodsp", dsp_disable); | |
69a6c312 AN |
594 | |
595 | unsigned long kernelsp[NR_CPUS]; | |
596 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; | |
6312e0ee AN |
597 | |
598 | #ifdef CONFIG_DEBUG_FS | |
599 | struct dentry *mips_debugfs_dir; | |
600 | static int __init debugfs_mips(void) | |
601 | { | |
602 | struct dentry *d; | |
603 | ||
604 | d = debugfs_create_dir("mips", NULL); | |
b517531c Z |
605 | if (!d) |
606 | return -ENOMEM; | |
6312e0ee AN |
607 | mips_debugfs_dir = d; |
608 | return 0; | |
609 | } | |
610 | arch_initcall(debugfs_mips); | |
611 | #endif |