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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. | |
70342287 | 11 | * Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki |
1da177e4 | 12 | */ |
1da177e4 LT |
13 | #include <linux/init.h> |
14 | #include <linux/ioport.h> | |
73bc256d | 15 | #include <linux/export.h> |
894673ee | 16 | #include <linux/screen_info.h> |
9d15ffc8 | 17 | #include <linux/memblock.h> |
1da177e4 LT |
18 | #include <linux/bootmem.h> |
19 | #include <linux/initrd.h> | |
1da177e4 LT |
20 | #include <linux/root_dev.h> |
21 | #include <linux/highmem.h> | |
22 | #include <linux/console.h> | |
22a9835c | 23 | #include <linux/pfn.h> |
6312e0ee | 24 | #include <linux/debugfs.h> |
7aa1c8f4 | 25 | #include <linux/kexec.h> |
1da177e4 LT |
26 | |
27 | #include <asm/addrspace.h> | |
28 | #include <asm/bootinfo.h> | |
20d60d99 | 29 | #include <asm/bugs.h> |
ec74e361 | 30 | #include <asm/cache.h> |
1da177e4 LT |
31 | #include <asm/cpu.h> |
32 | #include <asm/sections.h> | |
33 | #include <asm/setup.h> | |
87353d8a | 34 | #include <asm/smp-ops.h> |
f2ffa5ab | 35 | #include <asm/prom.h> |
1da177e4 | 36 | |
ec74e361 | 37 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
1da177e4 LT |
38 | |
39 | EXPORT_SYMBOL(cpu_data); | |
40 | ||
41 | #ifdef CONFIG_VT | |
42 | struct screen_info screen_info; | |
43 | #endif | |
44 | ||
45 | /* | |
46 | * Despite it's name this variable is even if we don't have PCI | |
47 | */ | |
48 | unsigned int PCI_DMA_BUS_IS_PHYS; | |
49 | ||
50 | EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS); | |
51 | ||
52 | /* | |
53 | * Setup information | |
54 | * | |
55 | * These are initialized so they are in the .data section | |
56 | */ | |
ec74e361 | 57 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
1da177e4 LT |
58 | |
59 | EXPORT_SYMBOL(mips_machtype); | |
1da177e4 LT |
60 | |
61 | struct boot_mem_map boot_mem_map; | |
62 | ||
6acc7d48 DV |
63 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
64 | char __initdata arcs_cmdline[COMMAND_LINE_SIZE]; | |
65 | ||
66 | #ifdef CONFIG_CMDLINE_BOOL | |
67 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
68 | #endif | |
1da177e4 LT |
69 | |
70 | /* | |
71 | * mips_io_port_base is the begin of the address space to which x86 style | |
72 | * I/O ports are mapped. | |
73 | */ | |
1befdd55 | 74 | const unsigned long mips_io_port_base = -1; |
1da177e4 LT |
75 | EXPORT_SYMBOL(mips_io_port_base); |
76 | ||
1da177e4 LT |
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; | |
0ec7ec75 | 83 | int i; |
1da177e4 | 84 | |
b6f1f0de FBH |
85 | /* Sanity check */ |
86 | if (start + size < start) { | |
a64ae7a2 | 87 | pr_warning("Trying to add an invalid memory region, skipped\n"); |
b6f1f0de FBH |
88 | return; |
89 | } | |
90 | ||
1da177e4 | 91 | /* |
0ec7ec75 | 92 | * Try to merge with existing entry, if any. |
1da177e4 | 93 | */ |
0ec7ec75 RB |
94 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
95 | struct boot_mem_map_entry *entry = boot_mem_map.map + i; | |
96 | unsigned long top; | |
97 | ||
98 | if (entry->type != type) | |
99 | continue; | |
100 | ||
101 | if (start + size < entry->addr) | |
102 | continue; /* no overlap */ | |
103 | ||
104 | if (entry->addr + entry->size < start) | |
105 | continue; /* no overlap */ | |
106 | ||
107 | top = max(entry->addr + entry->size, start + size); | |
108 | entry->addr = min(entry->addr, start); | |
109 | entry->size = top - entry->addr; | |
110 | ||
1da177e4 LT |
111 | return; |
112 | } | |
113 | ||
0ec7ec75 | 114 | if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) { |
a64ae7a2 | 115 | pr_err("Ooops! Too many entries in the memory map!\n"); |
1da177e4 LT |
116 | return; |
117 | } | |
118 | ||
119 | boot_mem_map.map[x].addr = start; | |
120 | boot_mem_map.map[x].size = size; | |
121 | boot_mem_map.map[x].type = type; | |
122 | boot_mem_map.nr_map++; | |
123 | } | |
124 | ||
125 | static void __init print_memory_map(void) | |
126 | { | |
127 | int i; | |
128 | const int field = 2 * sizeof(unsigned long); | |
129 | ||
130 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
a64ae7a2 | 131 | printk(KERN_INFO " memory: %0*Lx @ %0*Lx ", |
1da177e4 LT |
132 | field, (unsigned long long) boot_mem_map.map[i].size, |
133 | field, (unsigned long long) boot_mem_map.map[i].addr); | |
134 | ||
135 | switch (boot_mem_map.map[i].type) { | |
136 | case BOOT_MEM_RAM: | |
a64ae7a2 | 137 | printk(KERN_CONT "(usable)\n"); |
1da177e4 | 138 | break; |
43064c0c DD |
139 | case BOOT_MEM_INIT_RAM: |
140 | printk(KERN_CONT "(usable after init)\n"); | |
141 | break; | |
1da177e4 | 142 | case BOOT_MEM_ROM_DATA: |
a64ae7a2 | 143 | printk(KERN_CONT "(ROM data)\n"); |
1da177e4 LT |
144 | break; |
145 | case BOOT_MEM_RESERVED: | |
a64ae7a2 | 146 | printk(KERN_CONT "(reserved)\n"); |
1da177e4 LT |
147 | break; |
148 | default: | |
a64ae7a2 | 149 | printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type); |
1da177e4 LT |
150 | break; |
151 | } | |
152 | } | |
153 | } | |
154 | ||
d2043ca8 FBH |
155 | /* |
156 | * Manage initrd | |
157 | */ | |
158 | #ifdef CONFIG_BLK_DEV_INITRD | |
159 | ||
a09fc446 | 160 | static int __init rd_start_early(char *p) |
1da177e4 | 161 | { |
a09fc446 | 162 | unsigned long start = memparse(p, &p); |
1da177e4 | 163 | |
875d43e7 | 164 | #ifdef CONFIG_64BIT |
a7837b76 FBH |
165 | /* Guess if the sign extension was forgotten by bootloader */ |
166 | if (start < XKPHYS) | |
167 | start = (int)start; | |
1da177e4 | 168 | #endif |
a09fc446 FBH |
169 | initrd_start = start; |
170 | initrd_end += start; | |
a09fc446 FBH |
171 | return 0; |
172 | } | |
173 | early_param("rd_start", rd_start_early); | |
174 | ||
175 | static int __init rd_size_early(char *p) | |
176 | { | |
177 | initrd_end += memparse(p, &p); | |
1da177e4 LT |
178 | return 0; |
179 | } | |
a09fc446 | 180 | early_param("rd_size", rd_size_early); |
1da177e4 | 181 | |
a7837b76 | 182 | /* it returns the next free pfn after initrd */ |
d2043ca8 FBH |
183 | static unsigned long __init init_initrd(void) |
184 | { | |
a7837b76 | 185 | unsigned long end; |
d2043ca8 | 186 | |
d2043ca8 | 187 | /* |
a09fc446 FBH |
188 | * Board specific code or command line parser should have |
189 | * already set up initrd_start and initrd_end. In these cases | |
190 | * perfom sanity checks and use them if all looks good. | |
d2043ca8 | 191 | */ |
32028f1f | 192 | if (!initrd_start || initrd_end <= initrd_start) |
a7837b76 | 193 | goto disable; |
a7837b76 | 194 | |
a7837b76 | 195 | if (initrd_start & ~PAGE_MASK) { |
a64ae7a2 | 196 | pr_err("initrd start must be page aligned\n"); |
a7837b76 | 197 | goto disable; |
d2043ca8 | 198 | } |
a7837b76 | 199 | if (initrd_start < PAGE_OFFSET) { |
a64ae7a2 | 200 | pr_err("initrd start < PAGE_OFFSET\n"); |
a7837b76 FBH |
201 | goto disable; |
202 | } | |
203 | ||
204 | /* | |
205 | * Sanitize initrd addresses. For example firmware | |
206 | * can't guess if they need to pass them through | |
207 | * 64-bits values if the kernel has been built in pure | |
208 | * 32-bit. We need also to switch from KSEG0 to XKPHYS | |
209 | * addresses now, so the code can now safely use __pa(). | |
210 | */ | |
211 | end = __pa(initrd_end); | |
212 | initrd_end = (unsigned long)__va(end); | |
213 | initrd_start = (unsigned long)__va(__pa(initrd_start)); | |
214 | ||
215 | ROOT_DEV = Root_RAM0; | |
216 | return PFN_UP(end); | |
217 | disable: | |
218 | initrd_start = 0; | |
219 | initrd_end = 0; | |
220 | return 0; | |
d2043ca8 FBH |
221 | } |
222 | ||
223 | static void __init finalize_initrd(void) | |
224 | { | |
225 | unsigned long size = initrd_end - initrd_start; | |
226 | ||
227 | if (size == 0) { | |
228 | printk(KERN_INFO "Initrd not found or empty"); | |
229 | goto disable; | |
230 | } | |
d4df6d4e | 231 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
a64ae7a2 | 232 | printk(KERN_ERR "Initrd extends beyond end of memory"); |
d2043ca8 FBH |
233 | goto disable; |
234 | } | |
235 | ||
72a7fe39 | 236 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
d2043ca8 FBH |
237 | initrd_below_start_ok = 1; |
238 | ||
a64ae7a2 MC |
239 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
240 | initrd_start, size); | |
d2043ca8 FBH |
241 | return; |
242 | disable: | |
a64ae7a2 | 243 | printk(KERN_CONT " - disabling initrd\n"); |
d2043ca8 FBH |
244 | initrd_start = 0; |
245 | initrd_end = 0; | |
246 | } | |
247 | ||
248 | #else /* !CONFIG_BLK_DEV_INITRD */ | |
249 | ||
9ba126cf RB |
250 | static unsigned long __init init_initrd(void) |
251 | { | |
252 | return 0; | |
253 | } | |
254 | ||
d2043ca8 FBH |
255 | #define finalize_initrd() do {} while (0) |
256 | ||
257 | #endif | |
258 | ||
b6f1f0de FBH |
259 | /* |
260 | * Initialize the bootmem allocator. It also setup initrd related data | |
261 | * if needed. | |
262 | */ | |
d2043ca8 FBH |
263 | #ifdef CONFIG_SGI_IP27 |
264 | ||
b6f1f0de | 265 | static void __init bootmem_init(void) |
1da177e4 | 266 | { |
d2043ca8 FBH |
267 | init_initrd(); |
268 | finalize_initrd(); | |
269 | } | |
270 | ||
271 | #else /* !CONFIG_SGI_IP27 */ | |
272 | ||
273 | static void __init bootmem_init(void) | |
274 | { | |
e452e94e | 275 | unsigned long reserved_end; |
db84dc61 | 276 | unsigned long mapstart = ~0UL; |
1da177e4 LT |
277 | unsigned long bootmap_size; |
278 | int i; | |
1da177e4 LT |
279 | |
280 | /* | |
d2043ca8 FBH |
281 | * Init any data related to initrd. It's a nop if INITRD is |
282 | * not selected. Once that done we can determine the low bound | |
283 | * of usable memory. | |
1da177e4 | 284 | */ |
12e22e8e RB |
285 | reserved_end = max(init_initrd(), |
286 | (unsigned long) PFN_UP(__pa_symbol(&_end))); | |
1da177e4 | 287 | |
db84dc61 FBH |
288 | /* |
289 | * max_low_pfn is not a number of pages. The number of pages | |
290 | * of the system is given by 'max_low_pfn - min_low_pfn'. | |
291 | */ | |
292 | min_low_pfn = ~0UL; | |
293 | max_low_pfn = 0; | |
294 | ||
b6f1f0de FBH |
295 | /* |
296 | * Find the highest page frame number we have available. | |
297 | */ | |
1da177e4 LT |
298 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
299 | unsigned long start, end; | |
300 | ||
301 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
302 | continue; | |
303 | ||
304 | start = PFN_UP(boot_mem_map.map[i].addr); | |
305 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
b6f1f0de | 306 | + boot_mem_map.map[i].size); |
1da177e4 | 307 | |
db84dc61 FBH |
308 | if (end > max_low_pfn) |
309 | max_low_pfn = end; | |
310 | if (start < min_low_pfn) | |
311 | min_low_pfn = start; | |
b6f1f0de | 312 | if (end <= reserved_end) |
1da177e4 | 313 | continue; |
b6f1f0de FBH |
314 | if (start >= mapstart) |
315 | continue; | |
316 | mapstart = max(reserved_end, start); | |
1da177e4 LT |
317 | } |
318 | ||
db84dc61 FBH |
319 | if (min_low_pfn >= max_low_pfn) |
320 | panic("Incorrect memory mapping !!!"); | |
6f284a2c | 321 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
322 | pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
323 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), | |
324 | min_low_pfn - ARCH_PFN_OFFSET); | |
6f284a2c | 325 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
326 | pr_info("%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 | */ | |
dc3bf353 | 334 | max_pfn = max_low_pfn; |
db84dc61 | 335 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
b6f1f0de FBH |
336 | #ifdef CONFIG_HIGHMEM |
337 | highstart_pfn = PFN_DOWN(HIGHMEM_START); | |
db84dc61 | 338 | highend_pfn = max_low_pfn; |
1da177e4 | 339 | #endif |
db84dc61 | 340 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
1da177e4 LT |
341 | } |
342 | ||
1da177e4 | 343 | /* |
b6f1f0de | 344 | * Initialize the boot-time allocator with low memory only. |
1da177e4 | 345 | */ |
db84dc61 FBH |
346 | bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, |
347 | min_low_pfn, max_low_pfn); | |
cce335ae RB |
348 | |
349 | ||
cce335ae RB |
350 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
351 | unsigned long start, end; | |
352 | ||
353 | start = PFN_UP(boot_mem_map.map[i].addr); | |
354 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
355 | + boot_mem_map.map[i].size); | |
356 | ||
e452e94e AN |
357 | if (start <= min_low_pfn) |
358 | start = min_low_pfn; | |
cce335ae RB |
359 | if (start >= end) |
360 | continue; | |
361 | ||
362 | #ifndef CONFIG_HIGHMEM | |
363 | if (end > max_low_pfn) | |
364 | end = max_low_pfn; | |
365 | ||
366 | /* | |
367 | * ... finally, is the area going away? | |
368 | */ | |
369 | if (end <= start) | |
370 | continue; | |
371 | #endif | |
372 | ||
9d15ffc8 | 373 | memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0); |
cce335ae RB |
374 | } |
375 | ||
1da177e4 LT |
376 | /* |
377 | * Register fully available low RAM pages with the bootmem allocator. | |
378 | */ | |
379 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
b6f1f0de | 380 | unsigned long start, end, size; |
1da177e4 | 381 | |
43064c0c DD |
382 | start = PFN_UP(boot_mem_map.map[i].addr); |
383 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
384 | + boot_mem_map.map[i].size); | |
385 | ||
1da177e4 LT |
386 | /* |
387 | * Reserve usable memory. | |
388 | */ | |
43064c0c DD |
389 | switch (boot_mem_map.map[i].type) { |
390 | case BOOT_MEM_RAM: | |
391 | break; | |
392 | case BOOT_MEM_INIT_RAM: | |
393 | memory_present(0, start, end); | |
1da177e4 | 394 | continue; |
43064c0c DD |
395 | default: |
396 | /* Not usable memory */ | |
397 | continue; | |
398 | } | |
1da177e4 | 399 | |
1da177e4 | 400 | /* |
b6f1f0de FBH |
401 | * We are rounding up the start address of usable memory |
402 | * and at the end of the usable range downwards. | |
1da177e4 | 403 | */ |
b6f1f0de | 404 | if (start >= max_low_pfn) |
1da177e4 | 405 | continue; |
b6f1f0de FBH |
406 | if (start < reserved_end) |
407 | start = reserved_end; | |
408 | if (end > max_low_pfn) | |
409 | end = max_low_pfn; | |
1da177e4 LT |
410 | |
411 | /* | |
b6f1f0de | 412 | * ... finally, is the area going away? |
1da177e4 | 413 | */ |
b6f1f0de | 414 | if (end <= start) |
1da177e4 | 415 | continue; |
b6f1f0de | 416 | size = end - start; |
1da177e4 LT |
417 | |
418 | /* Register lowmem ranges */ | |
b6f1f0de FBH |
419 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
420 | memory_present(0, start, end); | |
1da177e4 LT |
421 | } |
422 | ||
b6f1f0de FBH |
423 | /* |
424 | * Reserve the bootmap memory. | |
425 | */ | |
72a7fe39 | 426 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT); |
b6f1f0de | 427 | |
d2043ca8 FBH |
428 | /* |
429 | * Reserve initrd memory if needed. | |
430 | */ | |
431 | finalize_initrd(); | |
1da177e4 LT |
432 | } |
433 | ||
d2043ca8 FBH |
434 | #endif /* CONFIG_SGI_IP27 */ |
435 | ||
2925aba4 | 436 | /* |
603e82ed | 437 | * arch_mem_init - initialize memory management subsystem |
2925aba4 RB |
438 | * |
439 | * o plat_mem_setup() detects the memory configuration and will record detected | |
440 | * memory areas using add_memory_region. | |
2925aba4 RB |
441 | * |
442 | * At this stage the memory configuration of the system is known to the | |
603e82ed | 443 | * kernel but generic memory management system is still entirely uninitialized. |
2925aba4 RB |
444 | * |
445 | * o bootmem_init() | |
446 | * o sparse_init() | |
447 | * o paging_init() | |
448 | * | |
449 | * At this stage the bootmem allocator is ready to use. | |
450 | * | |
451 | * NOTE: historically plat_mem_setup did the entire platform initialization. | |
70342287 | 452 | * This was rather impractical because it meant plat_mem_setup had to |
2925aba4 RB |
453 | * get away without any kind of memory allocator. To keep old code from |
454 | * breaking plat_setup was just renamed to plat_setup and a second platform | |
455 | * initialization hook for anything else was introduced. | |
456 | */ | |
457 | ||
982f6ffe | 458 | static int usermem __initdata; |
a09fc446 FBH |
459 | |
460 | static int __init early_parse_mem(char *p) | |
461 | { | |
462 | unsigned long start, size; | |
463 | ||
464 | /* | |
465 | * If a user specifies memory size, we | |
466 | * blow away any automatically generated | |
467 | * size. | |
468 | */ | |
469 | if (usermem == 0) { | |
470 | boot_mem_map.nr_map = 0; | |
471 | usermem = 1; | |
70342287 | 472 | } |
a09fc446 FBH |
473 | start = 0; |
474 | size = memparse(p, &p); | |
475 | if (*p == '@') | |
476 | start = memparse(p + 1, &p); | |
477 | ||
478 | add_memory_region(start, size, BOOT_MEM_RAM); | |
479 | return 0; | |
480 | } | |
481 | early_param("mem", early_parse_mem); | |
2925aba4 RB |
482 | |
483 | static void __init arch_mem_init(char **cmdline_p) | |
484 | { | |
43064c0c DD |
485 | phys_t init_mem, init_end, init_size; |
486 | ||
a09fc446 FBH |
487 | extern void plat_mem_setup(void); |
488 | ||
2925aba4 RB |
489 | /* call board setup routine */ |
490 | plat_mem_setup(); | |
491 | ||
43064c0c DD |
492 | init_mem = PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT; |
493 | init_end = PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT; | |
494 | init_size = init_end - init_mem; | |
495 | if (init_size) { | |
496 | /* Make sure it is in the boot_mem_map */ | |
497 | int i, found; | |
498 | found = 0; | |
499 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
500 | if (init_mem >= boot_mem_map.map[i].addr && | |
501 | init_mem < (boot_mem_map.map[i].addr + | |
502 | boot_mem_map.map[i].size)) { | |
503 | found = 1; | |
504 | break; | |
505 | } | |
506 | } | |
507 | if (!found) | |
508 | add_memory_region(init_mem, init_size, | |
509 | BOOT_MEM_INIT_RAM); | |
510 | } | |
511 | ||
a64ae7a2 | 512 | pr_info("Determined physical RAM map:\n"); |
a09fc446 FBH |
513 | print_memory_map(); |
514 | ||
6acc7d48 DV |
515 | #ifdef CONFIG_CMDLINE_BOOL |
516 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
517 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
518 | #else | |
519 | if (builtin_cmdline[0]) { | |
520 | strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); | |
521 | strlcat(arcs_cmdline, builtin_cmdline, COMMAND_LINE_SIZE); | |
522 | } | |
523 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
524 | #endif | |
525 | #else | |
526 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
527 | #endif | |
528 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); | |
2925aba4 RB |
529 | |
530 | *cmdline_p = command_line; | |
531 | ||
a09fc446 FBH |
532 | parse_early_param(); |
533 | ||
534 | if (usermem) { | |
a64ae7a2 | 535 | pr_info("User-defined physical RAM map:\n"); |
a09fc446 FBH |
536 | print_memory_map(); |
537 | } | |
538 | ||
2925aba4 | 539 | bootmem_init(); |
7aa1c8f4 RB |
540 | #ifdef CONFIG_KEXEC |
541 | if (crashk_res.start != crashk_res.end) | |
542 | reserve_bootmem(crashk_res.start, | |
543 | crashk_res.end - crashk_res.start + 1, | |
544 | BOOTMEM_DEFAULT); | |
545 | #endif | |
f2ffa5ab | 546 | device_tree_init(); |
2925aba4 | 547 | sparse_init(); |
ee71b7d2 | 548 | plat_swiotlb_setup(); |
2925aba4 RB |
549 | paging_init(); |
550 | } | |
551 | ||
7aa1c8f4 RB |
552 | #ifdef CONFIG_KEXEC |
553 | static inline unsigned long long get_total_mem(void) | |
554 | { | |
555 | unsigned long long total; | |
556 | ||
557 | total = max_pfn - min_low_pfn; | |
558 | return total << PAGE_SHIFT; | |
559 | } | |
560 | ||
561 | static void __init mips_parse_crashkernel(void) | |
562 | { | |
563 | unsigned long long total_mem; | |
564 | unsigned long long crash_size, crash_base; | |
565 | int ret; | |
566 | ||
567 | total_mem = get_total_mem(); | |
568 | ret = parse_crashkernel(boot_command_line, total_mem, | |
569 | &crash_size, &crash_base); | |
570 | if (ret != 0 || crash_size <= 0) | |
571 | return; | |
572 | ||
573 | crashk_res.start = crash_base; | |
70342287 | 574 | crashk_res.end = crash_base + crash_size - 1; |
7aa1c8f4 RB |
575 | } |
576 | ||
577 | static void __init request_crashkernel(struct resource *res) | |
578 | { | |
579 | int ret; | |
580 | ||
581 | ret = request_resource(res, &crashk_res); | |
582 | if (!ret) | |
583 | pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", | |
584 | (unsigned long)((crashk_res.end - | |
585 | crashk_res.start + 1) >> 20), | |
586 | (unsigned long)(crashk_res.start >> 20)); | |
587 | } | |
70342287 | 588 | #else /* !defined(CONFIG_KEXEC) */ |
7aa1c8f4 RB |
589 | static void __init mips_parse_crashkernel(void) |
590 | { | |
591 | } | |
592 | ||
593 | static void __init request_crashkernel(struct resource *res) | |
594 | { | |
595 | } | |
596 | #endif /* !defined(CONFIG_KEXEC) */ | |
597 | ||
8df32c63 | 598 | static void __init resource_init(void) |
1da177e4 LT |
599 | { |
600 | int i; | |
601 | ||
6adb5fe7 RB |
602 | if (UNCAC_BASE != IO_BASE) |
603 | return; | |
604 | ||
f5bffe3a FBH |
605 | code_resource.start = __pa_symbol(&_text); |
606 | code_resource.end = __pa_symbol(&_etext) - 1; | |
607 | data_resource.start = __pa_symbol(&_etext); | |
608 | data_resource.end = __pa_symbol(&_edata) - 1; | |
1da177e4 LT |
609 | |
610 | /* | |
611 | * Request address space for all standard RAM. | |
612 | */ | |
7aa1c8f4 RB |
613 | mips_parse_crashkernel(); |
614 | ||
1da177e4 LT |
615 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
616 | struct resource *res; | |
617 | unsigned long start, end; | |
618 | ||
619 | start = boot_mem_map.map[i].addr; | |
620 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; | |
1c6fd44d | 621 | if (start >= HIGHMEM_START) |
1da177e4 | 622 | continue; |
1c6fd44d FBH |
623 | if (end >= HIGHMEM_START) |
624 | end = HIGHMEM_START - 1; | |
1da177e4 LT |
625 | |
626 | res = alloc_bootmem(sizeof(struct resource)); | |
627 | switch (boot_mem_map.map[i].type) { | |
628 | case BOOT_MEM_RAM: | |
43064c0c | 629 | case BOOT_MEM_INIT_RAM: |
1da177e4 LT |
630 | case BOOT_MEM_ROM_DATA: |
631 | res->name = "System RAM"; | |
632 | break; | |
633 | case BOOT_MEM_RESERVED: | |
634 | default: | |
635 | res->name = "reserved"; | |
636 | } | |
637 | ||
638 | res->start = start; | |
639 | res->end = end; | |
640 | ||
641 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
642 | request_resource(&iomem_resource, res); | |
643 | ||
644 | /* | |
645 | * We don't know which RAM region contains kernel data, | |
646 | * so we try it repeatedly and let the resource manager | |
647 | * test it. | |
648 | */ | |
649 | request_resource(res, &code_resource); | |
650 | request_resource(res, &data_resource); | |
7aa1c8f4 | 651 | request_crashkernel(res); |
1da177e4 LT |
652 | } |
653 | } | |
654 | ||
1da177e4 LT |
655 | void __init setup_arch(char **cmdline_p) |
656 | { | |
657 | cpu_probe(); | |
658 | prom_init(); | |
36a88530 RB |
659 | |
660 | #ifdef CONFIG_EARLY_PRINTK | |
07cdb784 | 661 | setup_early_printk(); |
36a88530 | 662 | #endif |
1da177e4 | 663 | cpu_report(); |
20d60d99 | 664 | check_bugs_early(); |
1da177e4 LT |
665 | |
666 | #if defined(CONFIG_VT) | |
667 | #if defined(CONFIG_VGA_CONSOLE) | |
e0daad44 | 668 | conswitchp = &vga_con; |
1da177e4 | 669 | #elif defined(CONFIG_DUMMY_CONSOLE) |
e0daad44 | 670 | conswitchp = &dummy_con; |
1da177e4 LT |
671 | #endif |
672 | #endif | |
673 | ||
2925aba4 | 674 | arch_mem_init(cmdline_p); |
1da177e4 | 675 | |
1da177e4 | 676 | resource_init(); |
9b6695a8 | 677 | plat_smp_setup(); |
6650df3c DD |
678 | |
679 | cpu_cache_init(); | |
1da177e4 LT |
680 | } |
681 | ||
69a6c312 AN |
682 | unsigned long kernelsp[NR_CPUS]; |
683 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; | |
6312e0ee AN |
684 | |
685 | #ifdef CONFIG_DEBUG_FS | |
686 | struct dentry *mips_debugfs_dir; | |
687 | static int __init debugfs_mips(void) | |
688 | { | |
689 | struct dentry *d; | |
690 | ||
691 | d = debugfs_create_dir("mips", NULL); | |
b517531c Z |
692 | if (!d) |
693 | return -ENOMEM; | |
6312e0ee AN |
694 | mips_debugfs_dir = d; |
695 | return 0; | |
696 | } | |
697 | arch_initcall(debugfs_mips); | |
698 | #endif |