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> |
4d9f77d2 | 26 | #include <linux/sizes.h> |
1da177e4 LT |
27 | |
28 | #include <asm/addrspace.h> | |
29 | #include <asm/bootinfo.h> | |
20d60d99 | 30 | #include <asm/bugs.h> |
ec74e361 | 31 | #include <asm/cache.h> |
1da177e4 LT |
32 | #include <asm/cpu.h> |
33 | #include <asm/sections.h> | |
34 | #include <asm/setup.h> | |
87353d8a | 35 | #include <asm/smp-ops.h> |
f2ffa5ab | 36 | #include <asm/prom.h> |
1da177e4 | 37 | |
ec74e361 | 38 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
1da177e4 LT |
39 | |
40 | EXPORT_SYMBOL(cpu_data); | |
41 | ||
42 | #ifdef CONFIG_VT | |
43 | struct screen_info screen_info; | |
44 | #endif | |
45 | ||
46 | /* | |
47 | * Despite it's name this variable is even if we don't have PCI | |
48 | */ | |
49 | unsigned int PCI_DMA_BUS_IS_PHYS; | |
50 | ||
51 | EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS); | |
52 | ||
53 | /* | |
54 | * Setup information | |
55 | * | |
56 | * These are initialized so they are in the .data section | |
57 | */ | |
ec74e361 | 58 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
1da177e4 LT |
59 | |
60 | EXPORT_SYMBOL(mips_machtype); | |
1da177e4 LT |
61 | |
62 | struct boot_mem_map boot_mem_map; | |
63 | ||
6acc7d48 DV |
64 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
65 | char __initdata arcs_cmdline[COMMAND_LINE_SIZE]; | |
66 | ||
67 | #ifdef CONFIG_CMDLINE_BOOL | |
68 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
69 | #endif | |
1da177e4 LT |
70 | |
71 | /* | |
72 | * mips_io_port_base is the begin of the address space to which x86 style | |
73 | * I/O ports are mapped. | |
74 | */ | |
1befdd55 | 75 | const unsigned long mips_io_port_base = -1; |
1da177e4 LT |
76 | EXPORT_SYMBOL(mips_io_port_base); |
77 | ||
1da177e4 LT |
78 | static struct resource code_resource = { .name = "Kernel code", }; |
79 | static struct resource data_resource = { .name = "Kernel data", }; | |
80 | ||
4d9f77d2 JC |
81 | static void *detect_magic __initdata = detect_memory_region; |
82 | ||
1da177e4 LT |
83 | void __init add_memory_region(phys_t start, phys_t size, long type) |
84 | { | |
85 | int x = boot_mem_map.nr_map; | |
0ec7ec75 | 86 | int i; |
1da177e4 | 87 | |
b6f1f0de FBH |
88 | /* Sanity check */ |
89 | if (start + size < start) { | |
a64ae7a2 | 90 | pr_warning("Trying to add an invalid memory region, skipped\n"); |
b6f1f0de FBH |
91 | return; |
92 | } | |
93 | ||
1da177e4 | 94 | /* |
0ec7ec75 | 95 | * Try to merge with existing entry, if any. |
1da177e4 | 96 | */ |
0ec7ec75 RB |
97 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
98 | struct boot_mem_map_entry *entry = boot_mem_map.map + i; | |
99 | unsigned long top; | |
100 | ||
101 | if (entry->type != type) | |
102 | continue; | |
103 | ||
104 | if (start + size < entry->addr) | |
105 | continue; /* no overlap */ | |
106 | ||
107 | if (entry->addr + entry->size < start) | |
108 | continue; /* no overlap */ | |
109 | ||
110 | top = max(entry->addr + entry->size, start + size); | |
111 | entry->addr = min(entry->addr, start); | |
112 | entry->size = top - entry->addr; | |
113 | ||
1da177e4 LT |
114 | return; |
115 | } | |
116 | ||
0ec7ec75 | 117 | if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) { |
a64ae7a2 | 118 | pr_err("Ooops! Too many entries in the memory map!\n"); |
1da177e4 LT |
119 | return; |
120 | } | |
121 | ||
122 | boot_mem_map.map[x].addr = start; | |
123 | boot_mem_map.map[x].size = size; | |
124 | boot_mem_map.map[x].type = type; | |
125 | boot_mem_map.nr_map++; | |
126 | } | |
127 | ||
4d9f77d2 JC |
128 | void __init detect_memory_region(phys_t start, phys_t sz_min, phys_t sz_max) |
129 | { | |
130 | void *dm = &detect_magic; | |
131 | phys_t size; | |
132 | ||
133 | for (size = sz_min; size < sz_max; size <<= 1) { | |
134 | if (!memcmp(dm, dm + size, sizeof(detect_magic))) | |
135 | break; | |
136 | } | |
137 | ||
138 | pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n", | |
139 | ((unsigned long long) size) / SZ_1M, | |
140 | (unsigned long long) start, | |
141 | ((unsigned long long) sz_min) / SZ_1M, | |
142 | ((unsigned long long) sz_max) / SZ_1M); | |
143 | ||
144 | add_memory_region(start, size, BOOT_MEM_RAM); | |
145 | } | |
146 | ||
1da177e4 LT |
147 | static void __init print_memory_map(void) |
148 | { | |
149 | int i; | |
150 | const int field = 2 * sizeof(unsigned long); | |
151 | ||
152 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
a64ae7a2 | 153 | printk(KERN_INFO " memory: %0*Lx @ %0*Lx ", |
1da177e4 LT |
154 | field, (unsigned long long) boot_mem_map.map[i].size, |
155 | field, (unsigned long long) boot_mem_map.map[i].addr); | |
156 | ||
157 | switch (boot_mem_map.map[i].type) { | |
158 | case BOOT_MEM_RAM: | |
a64ae7a2 | 159 | printk(KERN_CONT "(usable)\n"); |
1da177e4 | 160 | break; |
43064c0c DD |
161 | case BOOT_MEM_INIT_RAM: |
162 | printk(KERN_CONT "(usable after init)\n"); | |
163 | break; | |
1da177e4 | 164 | case BOOT_MEM_ROM_DATA: |
a64ae7a2 | 165 | printk(KERN_CONT "(ROM data)\n"); |
1da177e4 LT |
166 | break; |
167 | case BOOT_MEM_RESERVED: | |
a64ae7a2 | 168 | printk(KERN_CONT "(reserved)\n"); |
1da177e4 LT |
169 | break; |
170 | default: | |
a64ae7a2 | 171 | printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type); |
1da177e4 LT |
172 | break; |
173 | } | |
174 | } | |
175 | } | |
176 | ||
d2043ca8 FBH |
177 | /* |
178 | * Manage initrd | |
179 | */ | |
180 | #ifdef CONFIG_BLK_DEV_INITRD | |
181 | ||
a09fc446 | 182 | static int __init rd_start_early(char *p) |
1da177e4 | 183 | { |
a09fc446 | 184 | unsigned long start = memparse(p, &p); |
1da177e4 | 185 | |
875d43e7 | 186 | #ifdef CONFIG_64BIT |
a7837b76 FBH |
187 | /* Guess if the sign extension was forgotten by bootloader */ |
188 | if (start < XKPHYS) | |
189 | start = (int)start; | |
1da177e4 | 190 | #endif |
a09fc446 FBH |
191 | initrd_start = start; |
192 | initrd_end += start; | |
a09fc446 FBH |
193 | return 0; |
194 | } | |
195 | early_param("rd_start", rd_start_early); | |
196 | ||
197 | static int __init rd_size_early(char *p) | |
198 | { | |
199 | initrd_end += memparse(p, &p); | |
1da177e4 LT |
200 | return 0; |
201 | } | |
a09fc446 | 202 | early_param("rd_size", rd_size_early); |
1da177e4 | 203 | |
a7837b76 | 204 | /* it returns the next free pfn after initrd */ |
d2043ca8 FBH |
205 | static unsigned long __init init_initrd(void) |
206 | { | |
a7837b76 | 207 | unsigned long end; |
d2043ca8 | 208 | |
d2043ca8 | 209 | /* |
a09fc446 FBH |
210 | * Board specific code or command line parser should have |
211 | * already set up initrd_start and initrd_end. In these cases | |
212 | * perfom sanity checks and use them if all looks good. | |
d2043ca8 | 213 | */ |
32028f1f | 214 | if (!initrd_start || initrd_end <= initrd_start) |
a7837b76 | 215 | goto disable; |
a7837b76 | 216 | |
a7837b76 | 217 | if (initrd_start & ~PAGE_MASK) { |
a64ae7a2 | 218 | pr_err("initrd start must be page aligned\n"); |
a7837b76 | 219 | goto disable; |
d2043ca8 | 220 | } |
a7837b76 | 221 | if (initrd_start < PAGE_OFFSET) { |
a64ae7a2 | 222 | pr_err("initrd start < PAGE_OFFSET\n"); |
a7837b76 FBH |
223 | goto disable; |
224 | } | |
225 | ||
226 | /* | |
227 | * Sanitize initrd addresses. For example firmware | |
228 | * can't guess if they need to pass them through | |
229 | * 64-bits values if the kernel has been built in pure | |
230 | * 32-bit. We need also to switch from KSEG0 to XKPHYS | |
231 | * addresses now, so the code can now safely use __pa(). | |
232 | */ | |
233 | end = __pa(initrd_end); | |
234 | initrd_end = (unsigned long)__va(end); | |
235 | initrd_start = (unsigned long)__va(__pa(initrd_start)); | |
236 | ||
237 | ROOT_DEV = Root_RAM0; | |
238 | return PFN_UP(end); | |
239 | disable: | |
240 | initrd_start = 0; | |
241 | initrd_end = 0; | |
242 | return 0; | |
d2043ca8 FBH |
243 | } |
244 | ||
245 | static void __init finalize_initrd(void) | |
246 | { | |
247 | unsigned long size = initrd_end - initrd_start; | |
248 | ||
249 | if (size == 0) { | |
250 | printk(KERN_INFO "Initrd not found or empty"); | |
251 | goto disable; | |
252 | } | |
d4df6d4e | 253 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
a64ae7a2 | 254 | printk(KERN_ERR "Initrd extends beyond end of memory"); |
d2043ca8 FBH |
255 | goto disable; |
256 | } | |
257 | ||
72a7fe39 | 258 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
d2043ca8 FBH |
259 | initrd_below_start_ok = 1; |
260 | ||
a64ae7a2 MC |
261 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
262 | initrd_start, size); | |
d2043ca8 FBH |
263 | return; |
264 | disable: | |
a64ae7a2 | 265 | printk(KERN_CONT " - disabling initrd\n"); |
d2043ca8 FBH |
266 | initrd_start = 0; |
267 | initrd_end = 0; | |
268 | } | |
269 | ||
270 | #else /* !CONFIG_BLK_DEV_INITRD */ | |
271 | ||
9ba126cf RB |
272 | static unsigned long __init init_initrd(void) |
273 | { | |
274 | return 0; | |
275 | } | |
276 | ||
d2043ca8 FBH |
277 | #define finalize_initrd() do {} while (0) |
278 | ||
279 | #endif | |
280 | ||
b6f1f0de FBH |
281 | /* |
282 | * Initialize the bootmem allocator. It also setup initrd related data | |
283 | * if needed. | |
284 | */ | |
d2043ca8 FBH |
285 | #ifdef CONFIG_SGI_IP27 |
286 | ||
b6f1f0de | 287 | static void __init bootmem_init(void) |
1da177e4 | 288 | { |
d2043ca8 FBH |
289 | init_initrd(); |
290 | finalize_initrd(); | |
291 | } | |
292 | ||
293 | #else /* !CONFIG_SGI_IP27 */ | |
294 | ||
295 | static void __init bootmem_init(void) | |
296 | { | |
e452e94e | 297 | unsigned long reserved_end; |
db84dc61 | 298 | unsigned long mapstart = ~0UL; |
1da177e4 LT |
299 | unsigned long bootmap_size; |
300 | int i; | |
1da177e4 LT |
301 | |
302 | /* | |
f9a7febd GU |
303 | * Sanity check any INITRD first. We don't take it into account |
304 | * for bootmem setup initially, rely on the end-of-kernel-code | |
305 | * as our memory range starting point. Once bootmem is inited we | |
306 | * will reserve the area used for the initrd. | |
1da177e4 | 307 | */ |
f9a7febd GU |
308 | init_initrd(); |
309 | reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end)); | |
1da177e4 | 310 | |
db84dc61 FBH |
311 | /* |
312 | * max_low_pfn is not a number of pages. The number of pages | |
313 | * of the system is given by 'max_low_pfn - min_low_pfn'. | |
314 | */ | |
315 | min_low_pfn = ~0UL; | |
316 | max_low_pfn = 0; | |
317 | ||
b6f1f0de FBH |
318 | /* |
319 | * Find the highest page frame number we have available. | |
320 | */ | |
1da177e4 LT |
321 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
322 | unsigned long start, end; | |
323 | ||
324 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
325 | continue; | |
326 | ||
327 | start = PFN_UP(boot_mem_map.map[i].addr); | |
328 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
b6f1f0de | 329 | + boot_mem_map.map[i].size); |
1da177e4 | 330 | |
db84dc61 FBH |
331 | if (end > max_low_pfn) |
332 | max_low_pfn = end; | |
333 | if (start < min_low_pfn) | |
334 | min_low_pfn = start; | |
b6f1f0de | 335 | if (end <= reserved_end) |
1da177e4 | 336 | continue; |
b6f1f0de FBH |
337 | if (start >= mapstart) |
338 | continue; | |
339 | mapstart = max(reserved_end, start); | |
1da177e4 LT |
340 | } |
341 | ||
db84dc61 FBH |
342 | if (min_low_pfn >= max_low_pfn) |
343 | panic("Incorrect memory mapping !!!"); | |
6f284a2c | 344 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
345 | pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
346 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), | |
347 | min_low_pfn - ARCH_PFN_OFFSET); | |
6f284a2c | 348 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
349 | pr_info("%lu free pages won't be used\n", |
350 | ARCH_PFN_OFFSET - min_low_pfn); | |
db84dc61 | 351 | } |
6f284a2c | 352 | min_low_pfn = ARCH_PFN_OFFSET; |
db84dc61 | 353 | |
1da177e4 LT |
354 | /* |
355 | * Determine low and high memory ranges | |
356 | */ | |
dc3bf353 | 357 | max_pfn = max_low_pfn; |
db84dc61 | 358 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
b6f1f0de FBH |
359 | #ifdef CONFIG_HIGHMEM |
360 | highstart_pfn = PFN_DOWN(HIGHMEM_START); | |
db84dc61 | 361 | highend_pfn = max_low_pfn; |
1da177e4 | 362 | #endif |
db84dc61 | 363 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
1da177e4 LT |
364 | } |
365 | ||
f9a7febd GU |
366 | #ifdef CONFIG_BLK_DEV_INITRD |
367 | /* | |
368 | * mapstart should be after initrd_end | |
369 | */ | |
370 | if (initrd_end) | |
371 | mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end))); | |
372 | #endif | |
373 | ||
1da177e4 | 374 | /* |
b6f1f0de | 375 | * Initialize the boot-time allocator with low memory only. |
1da177e4 | 376 | */ |
db84dc61 FBH |
377 | bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, |
378 | min_low_pfn, max_low_pfn); | |
cce335ae RB |
379 | |
380 | ||
cce335ae RB |
381 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
382 | unsigned long start, end; | |
383 | ||
384 | start = PFN_UP(boot_mem_map.map[i].addr); | |
385 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
386 | + boot_mem_map.map[i].size); | |
387 | ||
e452e94e AN |
388 | if (start <= min_low_pfn) |
389 | start = min_low_pfn; | |
cce335ae RB |
390 | if (start >= end) |
391 | continue; | |
392 | ||
393 | #ifndef CONFIG_HIGHMEM | |
394 | if (end > max_low_pfn) | |
395 | end = max_low_pfn; | |
396 | ||
397 | /* | |
398 | * ... finally, is the area going away? | |
399 | */ | |
400 | if (end <= start) | |
401 | continue; | |
402 | #endif | |
403 | ||
9d15ffc8 | 404 | memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0); |
cce335ae RB |
405 | } |
406 | ||
1da177e4 LT |
407 | /* |
408 | * Register fully available low RAM pages with the bootmem allocator. | |
409 | */ | |
410 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
b6f1f0de | 411 | unsigned long start, end, size; |
1da177e4 | 412 | |
43064c0c DD |
413 | start = PFN_UP(boot_mem_map.map[i].addr); |
414 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
415 | + boot_mem_map.map[i].size); | |
416 | ||
1da177e4 LT |
417 | /* |
418 | * Reserve usable memory. | |
419 | */ | |
43064c0c DD |
420 | switch (boot_mem_map.map[i].type) { |
421 | case BOOT_MEM_RAM: | |
422 | break; | |
423 | case BOOT_MEM_INIT_RAM: | |
424 | memory_present(0, start, end); | |
1da177e4 | 425 | continue; |
43064c0c DD |
426 | default: |
427 | /* Not usable memory */ | |
428 | continue; | |
429 | } | |
1da177e4 | 430 | |
1da177e4 | 431 | /* |
b6f1f0de FBH |
432 | * We are rounding up the start address of usable memory |
433 | * and at the end of the usable range downwards. | |
1da177e4 | 434 | */ |
b6f1f0de | 435 | if (start >= max_low_pfn) |
1da177e4 | 436 | continue; |
b6f1f0de FBH |
437 | if (start < reserved_end) |
438 | start = reserved_end; | |
439 | if (end > max_low_pfn) | |
440 | end = max_low_pfn; | |
1da177e4 LT |
441 | |
442 | /* | |
b6f1f0de | 443 | * ... finally, is the area going away? |
1da177e4 | 444 | */ |
b6f1f0de | 445 | if (end <= start) |
1da177e4 | 446 | continue; |
b6f1f0de | 447 | size = end - start; |
1da177e4 LT |
448 | |
449 | /* Register lowmem ranges */ | |
b6f1f0de FBH |
450 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
451 | memory_present(0, start, end); | |
1da177e4 LT |
452 | } |
453 | ||
b6f1f0de FBH |
454 | /* |
455 | * Reserve the bootmap memory. | |
456 | */ | |
72a7fe39 | 457 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT); |
b6f1f0de | 458 | |
d2043ca8 FBH |
459 | /* |
460 | * Reserve initrd memory if needed. | |
461 | */ | |
462 | finalize_initrd(); | |
1da177e4 LT |
463 | } |
464 | ||
d2043ca8 FBH |
465 | #endif /* CONFIG_SGI_IP27 */ |
466 | ||
2925aba4 | 467 | /* |
603e82ed | 468 | * arch_mem_init - initialize memory management subsystem |
2925aba4 RB |
469 | * |
470 | * o plat_mem_setup() detects the memory configuration and will record detected | |
471 | * memory areas using add_memory_region. | |
2925aba4 RB |
472 | * |
473 | * At this stage the memory configuration of the system is known to the | |
603e82ed | 474 | * kernel but generic memory management system is still entirely uninitialized. |
2925aba4 RB |
475 | * |
476 | * o bootmem_init() | |
477 | * o sparse_init() | |
478 | * o paging_init() | |
479 | * | |
480 | * At this stage the bootmem allocator is ready to use. | |
481 | * | |
482 | * NOTE: historically plat_mem_setup did the entire platform initialization. | |
70342287 | 483 | * This was rather impractical because it meant plat_mem_setup had to |
2925aba4 RB |
484 | * get away without any kind of memory allocator. To keep old code from |
485 | * breaking plat_setup was just renamed to plat_setup and a second platform | |
486 | * initialization hook for anything else was introduced. | |
487 | */ | |
488 | ||
982f6ffe | 489 | static int usermem __initdata; |
a09fc446 FBH |
490 | |
491 | static int __init early_parse_mem(char *p) | |
492 | { | |
493 | unsigned long start, size; | |
494 | ||
495 | /* | |
496 | * If a user specifies memory size, we | |
497 | * blow away any automatically generated | |
498 | * size. | |
499 | */ | |
500 | if (usermem == 0) { | |
501 | boot_mem_map.nr_map = 0; | |
502 | usermem = 1; | |
70342287 | 503 | } |
a09fc446 FBH |
504 | start = 0; |
505 | size = memparse(p, &p); | |
506 | if (*p == '@') | |
507 | start = memparse(p + 1, &p); | |
508 | ||
509 | add_memory_region(start, size, BOOT_MEM_RAM); | |
510 | return 0; | |
511 | } | |
512 | early_param("mem", early_parse_mem); | |
2925aba4 | 513 | |
4893fc88 CM |
514 | #ifdef CONFIG_PROC_VMCORE |
515 | unsigned long setup_elfcorehdr, setup_elfcorehdr_size; | |
516 | static int __init early_parse_elfcorehdr(char *p) | |
517 | { | |
518 | int i; | |
519 | ||
520 | setup_elfcorehdr = memparse(p, &p); | |
521 | ||
522 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
523 | unsigned long start = boot_mem_map.map[i].addr; | |
524 | unsigned long end = (boot_mem_map.map[i].addr + | |
525 | boot_mem_map.map[i].size); | |
526 | if (setup_elfcorehdr >= start && setup_elfcorehdr < end) { | |
527 | /* | |
528 | * Reserve from the elf core header to the end of | |
529 | * the memory segment, that should all be kdump | |
530 | * reserved memory. | |
531 | */ | |
532 | setup_elfcorehdr_size = end - setup_elfcorehdr; | |
533 | break; | |
534 | } | |
535 | } | |
536 | /* | |
537 | * If we don't find it in the memory map, then we shouldn't | |
538 | * have to worry about it, as the new kernel won't use it. | |
539 | */ | |
540 | return 0; | |
541 | } | |
542 | early_param("elfcorehdr", early_parse_elfcorehdr); | |
543 | #endif | |
544 | ||
d3ff9338 | 545 | static void __init arch_mem_addpart(phys_t mem, phys_t end, int type) |
2925aba4 | 546 | { |
d3ff9338 CM |
547 | phys_t size; |
548 | int i; | |
43064c0c | 549 | |
d3ff9338 CM |
550 | size = end - mem; |
551 | if (!size) | |
552 | return; | |
553 | ||
554 | /* Make sure it is in the boot_mem_map */ | |
555 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
556 | if (mem >= boot_mem_map.map[i].addr && | |
557 | mem < (boot_mem_map.map[i].addr + | |
558 | boot_mem_map.map[i].size)) | |
559 | return; | |
560 | } | |
561 | add_memory_region(mem, size, type); | |
562 | } | |
43064c0c | 563 | |
c2882b7f PM |
564 | #ifdef CONFIG_KEXEC |
565 | static inline unsigned long long get_total_mem(void) | |
566 | { | |
567 | unsigned long long total; | |
568 | ||
569 | total = max_pfn - min_low_pfn; | |
570 | return total << PAGE_SHIFT; | |
571 | } | |
572 | ||
573 | static void __init mips_parse_crashkernel(void) | |
574 | { | |
575 | unsigned long long total_mem; | |
576 | unsigned long long crash_size, crash_base; | |
577 | int ret; | |
578 | ||
579 | total_mem = get_total_mem(); | |
580 | ret = parse_crashkernel(boot_command_line, total_mem, | |
581 | &crash_size, &crash_base); | |
582 | if (ret != 0 || crash_size <= 0) | |
583 | return; | |
584 | ||
585 | crashk_res.start = crash_base; | |
586 | crashk_res.end = crash_base + crash_size - 1; | |
587 | } | |
588 | ||
589 | static void __init request_crashkernel(struct resource *res) | |
590 | { | |
591 | int ret; | |
592 | ||
593 | ret = request_resource(res, &crashk_res); | |
594 | if (!ret) | |
595 | pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", | |
596 | (unsigned long)((crashk_res.end - | |
597 | crashk_res.start + 1) >> 20), | |
598 | (unsigned long)(crashk_res.start >> 20)); | |
599 | } | |
600 | #else /* !defined(CONFIG_KEXEC) */ | |
601 | static void __init mips_parse_crashkernel(void) | |
602 | { | |
603 | } | |
604 | ||
605 | static void __init request_crashkernel(struct resource *res) | |
606 | { | |
607 | } | |
608 | #endif /* !defined(CONFIG_KEXEC) */ | |
609 | ||
d3ff9338 CM |
610 | static void __init arch_mem_init(char **cmdline_p) |
611 | { | |
a09fc446 FBH |
612 | extern void plat_mem_setup(void); |
613 | ||
2925aba4 RB |
614 | /* call board setup routine */ |
615 | plat_mem_setup(); | |
616 | ||
d3ff9338 CM |
617 | /* |
618 | * Make sure all kernel memory is in the maps. The "UP" and | |
619 | * "DOWN" are opposite for initdata since if it crosses over | |
620 | * into another memory section you don't want that to be | |
621 | * freed when the initdata is freed. | |
622 | */ | |
623 | arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT, | |
624 | PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT, | |
625 | BOOT_MEM_RAM); | |
626 | arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT, | |
627 | PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT, | |
628 | BOOT_MEM_INIT_RAM); | |
43064c0c | 629 | |
a64ae7a2 | 630 | pr_info("Determined physical RAM map:\n"); |
a09fc446 FBH |
631 | print_memory_map(); |
632 | ||
6acc7d48 DV |
633 | #ifdef CONFIG_CMDLINE_BOOL |
634 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
635 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
636 | #else | |
637 | if (builtin_cmdline[0]) { | |
638 | strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); | |
639 | strlcat(arcs_cmdline, builtin_cmdline, COMMAND_LINE_SIZE); | |
640 | } | |
641 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
642 | #endif | |
643 | #else | |
644 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
645 | #endif | |
646 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); | |
2925aba4 RB |
647 | |
648 | *cmdline_p = command_line; | |
649 | ||
a09fc446 FBH |
650 | parse_early_param(); |
651 | ||
652 | if (usermem) { | |
a64ae7a2 | 653 | pr_info("User-defined physical RAM map:\n"); |
a09fc446 FBH |
654 | print_memory_map(); |
655 | } | |
656 | ||
2925aba4 | 657 | bootmem_init(); |
4893fc88 CM |
658 | #ifdef CONFIG_PROC_VMCORE |
659 | if (setup_elfcorehdr && setup_elfcorehdr_size) { | |
660 | printk(KERN_INFO "kdump reserved memory at %lx-%lx\n", | |
661 | setup_elfcorehdr, setup_elfcorehdr_size); | |
662 | reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size, | |
663 | BOOTMEM_DEFAULT); | |
664 | } | |
665 | #endif | |
c2882b7f PM |
666 | |
667 | mips_parse_crashkernel(); | |
7aa1c8f4 RB |
668 | #ifdef CONFIG_KEXEC |
669 | if (crashk_res.start != crashk_res.end) | |
670 | reserve_bootmem(crashk_res.start, | |
671 | crashk_res.end - crashk_res.start + 1, | |
672 | BOOTMEM_DEFAULT); | |
673 | #endif | |
f2ffa5ab | 674 | device_tree_init(); |
2925aba4 | 675 | sparse_init(); |
ee71b7d2 | 676 | plat_swiotlb_setup(); |
2925aba4 RB |
677 | paging_init(); |
678 | } | |
679 | ||
8df32c63 | 680 | static void __init resource_init(void) |
1da177e4 LT |
681 | { |
682 | int i; | |
683 | ||
6adb5fe7 RB |
684 | if (UNCAC_BASE != IO_BASE) |
685 | return; | |
686 | ||
f5bffe3a FBH |
687 | code_resource.start = __pa_symbol(&_text); |
688 | code_resource.end = __pa_symbol(&_etext) - 1; | |
689 | data_resource.start = __pa_symbol(&_etext); | |
690 | data_resource.end = __pa_symbol(&_edata) - 1; | |
1da177e4 | 691 | |
1da177e4 LT |
692 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
693 | struct resource *res; | |
694 | unsigned long start, end; | |
695 | ||
696 | start = boot_mem_map.map[i].addr; | |
697 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; | |
1c6fd44d | 698 | if (start >= HIGHMEM_START) |
1da177e4 | 699 | continue; |
1c6fd44d FBH |
700 | if (end >= HIGHMEM_START) |
701 | end = HIGHMEM_START - 1; | |
1da177e4 LT |
702 | |
703 | res = alloc_bootmem(sizeof(struct resource)); | |
704 | switch (boot_mem_map.map[i].type) { | |
705 | case BOOT_MEM_RAM: | |
43064c0c | 706 | case BOOT_MEM_INIT_RAM: |
1da177e4 LT |
707 | case BOOT_MEM_ROM_DATA: |
708 | res->name = "System RAM"; | |
709 | break; | |
710 | case BOOT_MEM_RESERVED: | |
711 | default: | |
712 | res->name = "reserved"; | |
713 | } | |
714 | ||
715 | res->start = start; | |
716 | res->end = end; | |
717 | ||
718 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
719 | request_resource(&iomem_resource, res); | |
720 | ||
721 | /* | |
722 | * We don't know which RAM region contains kernel data, | |
723 | * so we try it repeatedly and let the resource manager | |
724 | * test it. | |
725 | */ | |
726 | request_resource(res, &code_resource); | |
727 | request_resource(res, &data_resource); | |
7aa1c8f4 | 728 | request_crashkernel(res); |
1da177e4 LT |
729 | } |
730 | } | |
731 | ||
1da177e4 LT |
732 | void __init setup_arch(char **cmdline_p) |
733 | { | |
734 | cpu_probe(); | |
735 | prom_init(); | |
36a88530 RB |
736 | |
737 | #ifdef CONFIG_EARLY_PRINTK | |
07cdb784 | 738 | setup_early_printk(); |
36a88530 | 739 | #endif |
1da177e4 | 740 | cpu_report(); |
20d60d99 | 741 | check_bugs_early(); |
1da177e4 LT |
742 | |
743 | #if defined(CONFIG_VT) | |
744 | #if defined(CONFIG_VGA_CONSOLE) | |
e0daad44 | 745 | conswitchp = &vga_con; |
1da177e4 | 746 | #elif defined(CONFIG_DUMMY_CONSOLE) |
e0daad44 | 747 | conswitchp = &dummy_con; |
1da177e4 LT |
748 | #endif |
749 | #endif | |
750 | ||
2925aba4 | 751 | arch_mem_init(cmdline_p); |
1da177e4 | 752 | |
1da177e4 | 753 | resource_init(); |
9b6695a8 | 754 | plat_smp_setup(); |
6650df3c DD |
755 | |
756 | cpu_cache_init(); | |
1da177e4 LT |
757 | } |
758 | ||
69a6c312 AN |
759 | unsigned long kernelsp[NR_CPUS]; |
760 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; | |
6312e0ee AN |
761 | |
762 | #ifdef CONFIG_DEBUG_FS | |
763 | struct dentry *mips_debugfs_dir; | |
764 | static int __init debugfs_mips(void) | |
765 | { | |
766 | struct dentry *d; | |
767 | ||
768 | d = debugfs_create_dir("mips", NULL); | |
b517531c Z |
769 | if (!d) |
770 | return -ENOMEM; | |
6312e0ee AN |
771 | mips_debugfs_dir = d; |
772 | return 0; | |
773 | } | |
774 | arch_initcall(debugfs_mips); | |
775 | #endif |