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> |
f4649382 ZLK |
27 | #include <linux/device.h> |
28 | #include <linux/dma-contiguous.h> | |
1da177e4 LT |
29 | |
30 | #include <asm/addrspace.h> | |
31 | #include <asm/bootinfo.h> | |
20d60d99 | 32 | #include <asm/bugs.h> |
ec74e361 | 33 | #include <asm/cache.h> |
e934945d | 34 | #include <asm/cdmm.h> |
1da177e4 LT |
35 | #include <asm/cpu.h> |
36 | #include <asm/sections.h> | |
37 | #include <asm/setup.h> | |
87353d8a | 38 | #include <asm/smp-ops.h> |
f2ffa5ab | 39 | #include <asm/prom.h> |
1da177e4 | 40 | |
ec74e361 | 41 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
1da177e4 LT |
42 | |
43 | EXPORT_SYMBOL(cpu_data); | |
44 | ||
45 | #ifdef CONFIG_VT | |
46 | struct screen_info screen_info; | |
47 | #endif | |
48 | ||
49 | /* | |
50 | * Despite it's name this variable is even if we don't have PCI | |
51 | */ | |
52 | unsigned int PCI_DMA_BUS_IS_PHYS; | |
53 | ||
54 | EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS); | |
55 | ||
56 | /* | |
57 | * Setup information | |
58 | * | |
59 | * These are initialized so they are in the .data section | |
60 | */ | |
ec74e361 | 61 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
1da177e4 LT |
62 | |
63 | EXPORT_SYMBOL(mips_machtype); | |
1da177e4 LT |
64 | |
65 | struct boot_mem_map boot_mem_map; | |
66 | ||
6acc7d48 DV |
67 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
68 | char __initdata arcs_cmdline[COMMAND_LINE_SIZE]; | |
69 | ||
70 | #ifdef CONFIG_CMDLINE_BOOL | |
71 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
72 | #endif | |
1da177e4 LT |
73 | |
74 | /* | |
75 | * mips_io_port_base is the begin of the address space to which x86 style | |
76 | * I/O ports are mapped. | |
77 | */ | |
1befdd55 | 78 | const unsigned long mips_io_port_base = -1; |
1da177e4 LT |
79 | EXPORT_SYMBOL(mips_io_port_base); |
80 | ||
1da177e4 LT |
81 | static struct resource code_resource = { .name = "Kernel code", }; |
82 | static struct resource data_resource = { .name = "Kernel data", }; | |
83 | ||
4d9f77d2 JC |
84 | static void *detect_magic __initdata = detect_memory_region; |
85 | ||
15d45cce | 86 | void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type) |
1da177e4 LT |
87 | { |
88 | int x = boot_mem_map.nr_map; | |
0ec7ec75 | 89 | int i; |
1da177e4 | 90 | |
b6f1f0de FBH |
91 | /* Sanity check */ |
92 | if (start + size < start) { | |
7178d2cd | 93 | pr_warn("Trying to add an invalid memory region, skipped\n"); |
b6f1f0de FBH |
94 | return; |
95 | } | |
96 | ||
1da177e4 | 97 | /* |
0ec7ec75 | 98 | * Try to merge with existing entry, if any. |
1da177e4 | 99 | */ |
0ec7ec75 RB |
100 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
101 | struct boot_mem_map_entry *entry = boot_mem_map.map + i; | |
102 | unsigned long top; | |
103 | ||
104 | if (entry->type != type) | |
105 | continue; | |
106 | ||
107 | if (start + size < entry->addr) | |
108 | continue; /* no overlap */ | |
109 | ||
110 | if (entry->addr + entry->size < start) | |
111 | continue; /* no overlap */ | |
112 | ||
113 | top = max(entry->addr + entry->size, start + size); | |
114 | entry->addr = min(entry->addr, start); | |
115 | entry->size = top - entry->addr; | |
116 | ||
1da177e4 LT |
117 | return; |
118 | } | |
119 | ||
0ec7ec75 | 120 | if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) { |
a64ae7a2 | 121 | pr_err("Ooops! Too many entries in the memory map!\n"); |
1da177e4 LT |
122 | return; |
123 | } | |
124 | ||
125 | boot_mem_map.map[x].addr = start; | |
126 | boot_mem_map.map[x].size = size; | |
127 | boot_mem_map.map[x].type = type; | |
128 | boot_mem_map.nr_map++; | |
129 | } | |
130 | ||
15d45cce | 131 | void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max) |
4d9f77d2 JC |
132 | { |
133 | void *dm = &detect_magic; | |
15d45cce | 134 | phys_addr_t size; |
4d9f77d2 JC |
135 | |
136 | for (size = sz_min; size < sz_max; size <<= 1) { | |
137 | if (!memcmp(dm, dm + size, sizeof(detect_magic))) | |
138 | break; | |
139 | } | |
140 | ||
141 | pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n", | |
142 | ((unsigned long long) size) / SZ_1M, | |
143 | (unsigned long long) start, | |
144 | ((unsigned long long) sz_min) / SZ_1M, | |
145 | ((unsigned long long) sz_max) / SZ_1M); | |
146 | ||
147 | add_memory_region(start, size, BOOT_MEM_RAM); | |
148 | } | |
149 | ||
1da177e4 LT |
150 | static void __init print_memory_map(void) |
151 | { | |
152 | int i; | |
153 | const int field = 2 * sizeof(unsigned long); | |
154 | ||
155 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
a64ae7a2 | 156 | printk(KERN_INFO " memory: %0*Lx @ %0*Lx ", |
1da177e4 LT |
157 | field, (unsigned long long) boot_mem_map.map[i].size, |
158 | field, (unsigned long long) boot_mem_map.map[i].addr); | |
159 | ||
160 | switch (boot_mem_map.map[i].type) { | |
161 | case BOOT_MEM_RAM: | |
a64ae7a2 | 162 | printk(KERN_CONT "(usable)\n"); |
1da177e4 | 163 | break; |
43064c0c DD |
164 | case BOOT_MEM_INIT_RAM: |
165 | printk(KERN_CONT "(usable after init)\n"); | |
166 | break; | |
1da177e4 | 167 | case BOOT_MEM_ROM_DATA: |
a64ae7a2 | 168 | printk(KERN_CONT "(ROM data)\n"); |
1da177e4 LT |
169 | break; |
170 | case BOOT_MEM_RESERVED: | |
a64ae7a2 | 171 | printk(KERN_CONT "(reserved)\n"); |
1da177e4 LT |
172 | break; |
173 | default: | |
a64ae7a2 | 174 | printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type); |
1da177e4 LT |
175 | break; |
176 | } | |
177 | } | |
178 | } | |
179 | ||
d2043ca8 FBH |
180 | /* |
181 | * Manage initrd | |
182 | */ | |
183 | #ifdef CONFIG_BLK_DEV_INITRD | |
184 | ||
a09fc446 | 185 | static int __init rd_start_early(char *p) |
1da177e4 | 186 | { |
a09fc446 | 187 | unsigned long start = memparse(p, &p); |
1da177e4 | 188 | |
875d43e7 | 189 | #ifdef CONFIG_64BIT |
a7837b76 FBH |
190 | /* Guess if the sign extension was forgotten by bootloader */ |
191 | if (start < XKPHYS) | |
192 | start = (int)start; | |
1da177e4 | 193 | #endif |
a09fc446 FBH |
194 | initrd_start = start; |
195 | initrd_end += start; | |
a09fc446 FBH |
196 | return 0; |
197 | } | |
198 | early_param("rd_start", rd_start_early); | |
199 | ||
200 | static int __init rd_size_early(char *p) | |
201 | { | |
202 | initrd_end += memparse(p, &p); | |
1da177e4 LT |
203 | return 0; |
204 | } | |
a09fc446 | 205 | early_param("rd_size", rd_size_early); |
1da177e4 | 206 | |
a7837b76 | 207 | /* it returns the next free pfn after initrd */ |
d2043ca8 FBH |
208 | static unsigned long __init init_initrd(void) |
209 | { | |
a7837b76 | 210 | unsigned long end; |
d2043ca8 | 211 | |
d2043ca8 | 212 | /* |
a09fc446 FBH |
213 | * Board specific code or command line parser should have |
214 | * already set up initrd_start and initrd_end. In these cases | |
215 | * perfom sanity checks and use them if all looks good. | |
d2043ca8 | 216 | */ |
32028f1f | 217 | if (!initrd_start || initrd_end <= initrd_start) |
a7837b76 | 218 | goto disable; |
a7837b76 | 219 | |
a7837b76 | 220 | if (initrd_start & ~PAGE_MASK) { |
a64ae7a2 | 221 | pr_err("initrd start must be page aligned\n"); |
a7837b76 | 222 | goto disable; |
d2043ca8 | 223 | } |
a7837b76 | 224 | if (initrd_start < PAGE_OFFSET) { |
a64ae7a2 | 225 | pr_err("initrd start < PAGE_OFFSET\n"); |
a7837b76 FBH |
226 | goto disable; |
227 | } | |
228 | ||
229 | /* | |
230 | * Sanitize initrd addresses. For example firmware | |
231 | * can't guess if they need to pass them through | |
232 | * 64-bits values if the kernel has been built in pure | |
233 | * 32-bit. We need also to switch from KSEG0 to XKPHYS | |
234 | * addresses now, so the code can now safely use __pa(). | |
235 | */ | |
236 | end = __pa(initrd_end); | |
237 | initrd_end = (unsigned long)__va(end); | |
238 | initrd_start = (unsigned long)__va(__pa(initrd_start)); | |
239 | ||
240 | ROOT_DEV = Root_RAM0; | |
241 | return PFN_UP(end); | |
242 | disable: | |
243 | initrd_start = 0; | |
244 | initrd_end = 0; | |
245 | return 0; | |
d2043ca8 FBH |
246 | } |
247 | ||
248 | static void __init finalize_initrd(void) | |
249 | { | |
250 | unsigned long size = initrd_end - initrd_start; | |
251 | ||
252 | if (size == 0) { | |
253 | printk(KERN_INFO "Initrd not found or empty"); | |
254 | goto disable; | |
255 | } | |
d4df6d4e | 256 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
a64ae7a2 | 257 | printk(KERN_ERR "Initrd extends beyond end of memory"); |
d2043ca8 FBH |
258 | goto disable; |
259 | } | |
260 | ||
72a7fe39 | 261 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
d2043ca8 FBH |
262 | initrd_below_start_ok = 1; |
263 | ||
a64ae7a2 MC |
264 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
265 | initrd_start, size); | |
d2043ca8 FBH |
266 | return; |
267 | disable: | |
a64ae7a2 | 268 | printk(KERN_CONT " - disabling initrd\n"); |
d2043ca8 FBH |
269 | initrd_start = 0; |
270 | initrd_end = 0; | |
271 | } | |
272 | ||
273 | #else /* !CONFIG_BLK_DEV_INITRD */ | |
274 | ||
9ba126cf RB |
275 | static unsigned long __init init_initrd(void) |
276 | { | |
277 | return 0; | |
278 | } | |
279 | ||
d2043ca8 FBH |
280 | #define finalize_initrd() do {} while (0) |
281 | ||
282 | #endif | |
283 | ||
b6f1f0de FBH |
284 | /* |
285 | * Initialize the bootmem allocator. It also setup initrd related data | |
286 | * if needed. | |
287 | */ | |
c4617318 | 288 | #if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA)) |
d2043ca8 | 289 | |
b6f1f0de | 290 | static void __init bootmem_init(void) |
1da177e4 | 291 | { |
d2043ca8 FBH |
292 | init_initrd(); |
293 | finalize_initrd(); | |
294 | } | |
295 | ||
296 | #else /* !CONFIG_SGI_IP27 */ | |
297 | ||
298 | static void __init bootmem_init(void) | |
299 | { | |
e452e94e | 300 | unsigned long reserved_end; |
db84dc61 | 301 | unsigned long mapstart = ~0UL; |
1da177e4 LT |
302 | unsigned long bootmap_size; |
303 | int i; | |
1da177e4 LT |
304 | |
305 | /* | |
f9a7febd GU |
306 | * Sanity check any INITRD first. We don't take it into account |
307 | * for bootmem setup initially, rely on the end-of-kernel-code | |
308 | * as our memory range starting point. Once bootmem is inited we | |
309 | * will reserve the area used for the initrd. | |
1da177e4 | 310 | */ |
f9a7febd GU |
311 | init_initrd(); |
312 | reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end)); | |
1da177e4 | 313 | |
db84dc61 FBH |
314 | /* |
315 | * max_low_pfn is not a number of pages. The number of pages | |
316 | * of the system is given by 'max_low_pfn - min_low_pfn'. | |
317 | */ | |
318 | min_low_pfn = ~0UL; | |
319 | max_low_pfn = 0; | |
320 | ||
b6f1f0de FBH |
321 | /* |
322 | * Find the highest page frame number we have available. | |
323 | */ | |
1da177e4 LT |
324 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
325 | unsigned long start, end; | |
326 | ||
327 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
328 | continue; | |
329 | ||
330 | start = PFN_UP(boot_mem_map.map[i].addr); | |
331 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
b6f1f0de | 332 | + boot_mem_map.map[i].size); |
1da177e4 | 333 | |
db84dc61 FBH |
334 | if (end > max_low_pfn) |
335 | max_low_pfn = end; | |
336 | if (start < min_low_pfn) | |
337 | min_low_pfn = start; | |
b6f1f0de | 338 | if (end <= reserved_end) |
1da177e4 | 339 | continue; |
a6335fa1 AS |
340 | #ifdef CONFIG_BLK_DEV_INITRD |
341 | /* mapstart should be after initrd_end */ | |
342 | if (initrd_end && end <= (unsigned long)PFN_UP(__pa(initrd_end))) | |
343 | continue; | |
344 | #endif | |
b6f1f0de FBH |
345 | if (start >= mapstart) |
346 | continue; | |
347 | mapstart = max(reserved_end, start); | |
1da177e4 LT |
348 | } |
349 | ||
db84dc61 FBH |
350 | if (min_low_pfn >= max_low_pfn) |
351 | panic("Incorrect memory mapping !!!"); | |
6f284a2c | 352 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
353 | pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
354 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), | |
355 | min_low_pfn - ARCH_PFN_OFFSET); | |
6f284a2c | 356 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
357 | pr_info("%lu free pages won't be used\n", |
358 | ARCH_PFN_OFFSET - min_low_pfn); | |
db84dc61 | 359 | } |
6f284a2c | 360 | min_low_pfn = ARCH_PFN_OFFSET; |
db84dc61 | 361 | |
1da177e4 LT |
362 | /* |
363 | * Determine low and high memory ranges | |
364 | */ | |
dc3bf353 | 365 | max_pfn = max_low_pfn; |
db84dc61 | 366 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
b6f1f0de FBH |
367 | #ifdef CONFIG_HIGHMEM |
368 | highstart_pfn = PFN_DOWN(HIGHMEM_START); | |
db84dc61 | 369 | highend_pfn = max_low_pfn; |
1da177e4 | 370 | #endif |
db84dc61 | 371 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
1da177e4 LT |
372 | } |
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() | |
f4649382 | 479 | * o dma_continguous_reserve() |
2925aba4 RB |
480 | * |
481 | * At this stage the bootmem allocator is ready to use. | |
482 | * | |
483 | * NOTE: historically plat_mem_setup did the entire platform initialization. | |
70342287 | 484 | * This was rather impractical because it meant plat_mem_setup had to |
2925aba4 | 485 | * get away without any kind of memory allocator. To keep old code from |
7f0dd768 | 486 | * breaking plat_setup was just renamed to plat_mem_setup and a second platform |
2925aba4 RB |
487 | * initialization hook for anything else was introduced. |
488 | */ | |
489 | ||
982f6ffe | 490 | static int usermem __initdata; |
a09fc446 FBH |
491 | |
492 | static int __init early_parse_mem(char *p) | |
493 | { | |
ad8f723a | 494 | phys_addr_t start, size; |
a09fc446 FBH |
495 | |
496 | /* | |
497 | * If a user specifies memory size, we | |
498 | * blow away any automatically generated | |
499 | * size. | |
500 | */ | |
501 | if (usermem == 0) { | |
502 | boot_mem_map.nr_map = 0; | |
503 | usermem = 1; | |
70342287 | 504 | } |
a09fc446 FBH |
505 | start = 0; |
506 | size = memparse(p, &p); | |
507 | if (*p == '@') | |
508 | start = memparse(p + 1, &p); | |
509 | ||
510 | add_memory_region(start, size, BOOT_MEM_RAM); | |
511 | return 0; | |
512 | } | |
513 | early_param("mem", early_parse_mem); | |
2925aba4 | 514 | |
4893fc88 CM |
515 | #ifdef CONFIG_PROC_VMCORE |
516 | unsigned long setup_elfcorehdr, setup_elfcorehdr_size; | |
517 | static int __init early_parse_elfcorehdr(char *p) | |
518 | { | |
519 | int i; | |
520 | ||
521 | setup_elfcorehdr = memparse(p, &p); | |
522 | ||
523 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
524 | unsigned long start = boot_mem_map.map[i].addr; | |
525 | unsigned long end = (boot_mem_map.map[i].addr + | |
526 | boot_mem_map.map[i].size); | |
527 | if (setup_elfcorehdr >= start && setup_elfcorehdr < end) { | |
528 | /* | |
529 | * Reserve from the elf core header to the end of | |
530 | * the memory segment, that should all be kdump | |
531 | * reserved memory. | |
532 | */ | |
533 | setup_elfcorehdr_size = end - setup_elfcorehdr; | |
534 | break; | |
535 | } | |
536 | } | |
537 | /* | |
538 | * If we don't find it in the memory map, then we shouldn't | |
539 | * have to worry about it, as the new kernel won't use it. | |
540 | */ | |
541 | return 0; | |
542 | } | |
543 | early_param("elfcorehdr", early_parse_elfcorehdr); | |
544 | #endif | |
545 | ||
15d45cce | 546 | static void __init arch_mem_addpart(phys_addr_t mem, phys_addr_t end, int type) |
2925aba4 | 547 | { |
15d45cce | 548 | phys_addr_t size; |
d3ff9338 | 549 | int i; |
43064c0c | 550 | |
d3ff9338 CM |
551 | size = end - mem; |
552 | if (!size) | |
553 | return; | |
554 | ||
555 | /* Make sure it is in the boot_mem_map */ | |
556 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
557 | if (mem >= boot_mem_map.map[i].addr && | |
558 | mem < (boot_mem_map.map[i].addr + | |
559 | boot_mem_map.map[i].size)) | |
560 | return; | |
561 | } | |
562 | add_memory_region(mem, size, type); | |
563 | } | |
43064c0c | 564 | |
c2882b7f PM |
565 | #ifdef CONFIG_KEXEC |
566 | static inline unsigned long long get_total_mem(void) | |
567 | { | |
568 | unsigned long long total; | |
569 | ||
570 | total = max_pfn - min_low_pfn; | |
571 | return total << PAGE_SHIFT; | |
572 | } | |
573 | ||
574 | static void __init mips_parse_crashkernel(void) | |
575 | { | |
576 | unsigned long long total_mem; | |
577 | unsigned long long crash_size, crash_base; | |
578 | int ret; | |
579 | ||
580 | total_mem = get_total_mem(); | |
581 | ret = parse_crashkernel(boot_command_line, total_mem, | |
582 | &crash_size, &crash_base); | |
583 | if (ret != 0 || crash_size <= 0) | |
584 | return; | |
585 | ||
586 | crashk_res.start = crash_base; | |
587 | crashk_res.end = crash_base + crash_size - 1; | |
588 | } | |
589 | ||
590 | static void __init request_crashkernel(struct resource *res) | |
591 | { | |
592 | int ret; | |
593 | ||
594 | ret = request_resource(res, &crashk_res); | |
595 | if (!ret) | |
596 | pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", | |
597 | (unsigned long)((crashk_res.end - | |
598 | crashk_res.start + 1) >> 20), | |
599 | (unsigned long)(crashk_res.start >> 20)); | |
600 | } | |
601 | #else /* !defined(CONFIG_KEXEC) */ | |
602 | static void __init mips_parse_crashkernel(void) | |
603 | { | |
604 | } | |
605 | ||
606 | static void __init request_crashkernel(struct resource *res) | |
607 | { | |
608 | } | |
609 | #endif /* !defined(CONFIG_KEXEC) */ | |
610 | ||
d3ff9338 CM |
611 | static void __init arch_mem_init(char **cmdline_p) |
612 | { | |
f4649382 | 613 | struct memblock_region *reg; |
a09fc446 FBH |
614 | extern void plat_mem_setup(void); |
615 | ||
2925aba4 RB |
616 | /* call board setup routine */ |
617 | plat_mem_setup(); | |
618 | ||
d3ff9338 CM |
619 | /* |
620 | * Make sure all kernel memory is in the maps. The "UP" and | |
621 | * "DOWN" are opposite for initdata since if it crosses over | |
622 | * into another memory section you don't want that to be | |
623 | * freed when the initdata is freed. | |
624 | */ | |
625 | arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT, | |
626 | PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT, | |
627 | BOOT_MEM_RAM); | |
628 | arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT, | |
629 | PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT, | |
630 | BOOT_MEM_INIT_RAM); | |
43064c0c | 631 | |
a64ae7a2 | 632 | pr_info("Determined physical RAM map:\n"); |
a09fc446 FBH |
633 | print_memory_map(); |
634 | ||
6acc7d48 DV |
635 | #ifdef CONFIG_CMDLINE_BOOL |
636 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
637 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
638 | #else | |
639 | if (builtin_cmdline[0]) { | |
640 | strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); | |
641 | strlcat(arcs_cmdline, builtin_cmdline, COMMAND_LINE_SIZE); | |
642 | } | |
643 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
644 | #endif | |
645 | #else | |
646 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
647 | #endif | |
648 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); | |
2925aba4 RB |
649 | |
650 | *cmdline_p = command_line; | |
651 | ||
a09fc446 FBH |
652 | parse_early_param(); |
653 | ||
654 | if (usermem) { | |
a64ae7a2 | 655 | pr_info("User-defined physical RAM map:\n"); |
a09fc446 FBH |
656 | print_memory_map(); |
657 | } | |
658 | ||
2925aba4 | 659 | bootmem_init(); |
4893fc88 CM |
660 | #ifdef CONFIG_PROC_VMCORE |
661 | if (setup_elfcorehdr && setup_elfcorehdr_size) { | |
662 | printk(KERN_INFO "kdump reserved memory at %lx-%lx\n", | |
663 | setup_elfcorehdr, setup_elfcorehdr_size); | |
664 | reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size, | |
665 | BOOTMEM_DEFAULT); | |
666 | } | |
667 | #endif | |
c2882b7f PM |
668 | |
669 | mips_parse_crashkernel(); | |
7aa1c8f4 RB |
670 | #ifdef CONFIG_KEXEC |
671 | if (crashk_res.start != crashk_res.end) | |
672 | reserve_bootmem(crashk_res.start, | |
673 | crashk_res.end - crashk_res.start + 1, | |
674 | BOOTMEM_DEFAULT); | |
675 | #endif | |
f2ffa5ab | 676 | device_tree_init(); |
2925aba4 | 677 | sparse_init(); |
ee71b7d2 | 678 | plat_swiotlb_setup(); |
2925aba4 | 679 | paging_init(); |
f4649382 ZLK |
680 | |
681 | dma_contiguous_reserve(PFN_PHYS(max_low_pfn)); | |
682 | /* Tell bootmem about cma reserved memblock section */ | |
683 | for_each_memblock(reserved, reg) | |
30fa0530 ZLK |
684 | if (reg->size != 0) |
685 | reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); | |
2925aba4 RB |
686 | } |
687 | ||
8df32c63 | 688 | static void __init resource_init(void) |
1da177e4 LT |
689 | { |
690 | int i; | |
691 | ||
6adb5fe7 RB |
692 | if (UNCAC_BASE != IO_BASE) |
693 | return; | |
694 | ||
f5bffe3a FBH |
695 | code_resource.start = __pa_symbol(&_text); |
696 | code_resource.end = __pa_symbol(&_etext) - 1; | |
697 | data_resource.start = __pa_symbol(&_etext); | |
698 | data_resource.end = __pa_symbol(&_edata) - 1; | |
1da177e4 | 699 | |
1da177e4 LT |
700 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
701 | struct resource *res; | |
702 | unsigned long start, end; | |
703 | ||
704 | start = boot_mem_map.map[i].addr; | |
705 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; | |
1c6fd44d | 706 | if (start >= HIGHMEM_START) |
1da177e4 | 707 | continue; |
1c6fd44d FBH |
708 | if (end >= HIGHMEM_START) |
709 | end = HIGHMEM_START - 1; | |
1da177e4 LT |
710 | |
711 | res = alloc_bootmem(sizeof(struct resource)); | |
712 | switch (boot_mem_map.map[i].type) { | |
713 | case BOOT_MEM_RAM: | |
43064c0c | 714 | case BOOT_MEM_INIT_RAM: |
1da177e4 LT |
715 | case BOOT_MEM_ROM_DATA: |
716 | res->name = "System RAM"; | |
717 | break; | |
718 | case BOOT_MEM_RESERVED: | |
719 | default: | |
720 | res->name = "reserved"; | |
721 | } | |
722 | ||
723 | res->start = start; | |
724 | res->end = end; | |
725 | ||
726 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
727 | request_resource(&iomem_resource, res); | |
728 | ||
729 | /* | |
730 | * We don't know which RAM region contains kernel data, | |
731 | * so we try it repeatedly and let the resource manager | |
732 | * test it. | |
733 | */ | |
734 | request_resource(res, &code_resource); | |
735 | request_resource(res, &data_resource); | |
7aa1c8f4 | 736 | request_crashkernel(res); |
1da177e4 LT |
737 | } |
738 | } | |
739 | ||
0f3f506b HC |
740 | #ifdef CONFIG_SMP |
741 | static void __init prefill_possible_map(void) | |
742 | { | |
743 | int i, possible = num_possible_cpus(); | |
744 | ||
745 | if (possible > nr_cpu_ids) | |
746 | possible = nr_cpu_ids; | |
747 | ||
748 | for (i = 0; i < possible; i++) | |
749 | set_cpu_possible(i, true); | |
750 | for (; i < NR_CPUS; i++) | |
751 | set_cpu_possible(i, false); | |
752 | ||
753 | nr_cpu_ids = possible; | |
754 | } | |
755 | #else | |
756 | static inline void prefill_possible_map(void) {} | |
757 | #endif | |
758 | ||
1da177e4 LT |
759 | void __init setup_arch(char **cmdline_p) |
760 | { | |
761 | cpu_probe(); | |
762 | prom_init(); | |
36a88530 | 763 | |
e934945d | 764 | setup_early_fdc_console(); |
36a88530 | 765 | #ifdef CONFIG_EARLY_PRINTK |
07cdb784 | 766 | setup_early_printk(); |
36a88530 | 767 | #endif |
1da177e4 | 768 | cpu_report(); |
20d60d99 | 769 | check_bugs_early(); |
1da177e4 LT |
770 | |
771 | #if defined(CONFIG_VT) | |
772 | #if defined(CONFIG_VGA_CONSOLE) | |
e0daad44 | 773 | conswitchp = &vga_con; |
1da177e4 | 774 | #elif defined(CONFIG_DUMMY_CONSOLE) |
e0daad44 | 775 | conswitchp = &dummy_con; |
1da177e4 LT |
776 | #endif |
777 | #endif | |
778 | ||
2925aba4 | 779 | arch_mem_init(cmdline_p); |
1da177e4 | 780 | |
1da177e4 | 781 | resource_init(); |
9b6695a8 | 782 | plat_smp_setup(); |
0f3f506b | 783 | prefill_possible_map(); |
6650df3c DD |
784 | |
785 | cpu_cache_init(); | |
1da177e4 LT |
786 | } |
787 | ||
69a6c312 AN |
788 | unsigned long kernelsp[NR_CPUS]; |
789 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; | |
6312e0ee AN |
790 | |
791 | #ifdef CONFIG_DEBUG_FS | |
792 | struct dentry *mips_debugfs_dir; | |
793 | static int __init debugfs_mips(void) | |
794 | { | |
795 | struct dentry *d; | |
796 | ||
797 | d = debugfs_create_dir("mips", NULL); | |
b517531c Z |
798 | if (!d) |
799 | return -ENOMEM; | |
6312e0ee AN |
800 | mips_debugfs_dir = d; |
801 | return 0; | |
802 | } | |
803 | arch_initcall(debugfs_mips); | |
804 | #endif |