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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> |
4d9f77d2 | 26 | #include <linux/sizes.h> |
f4649382 ZLK |
27 | #include <linux/device.h> |
28 | #include <linux/dma-contiguous.h> | |
8f4703aa | 29 | #include <linux/decompress/generic.h> |
73346081 | 30 | #include <linux/of_fdt.h> |
1da177e4 LT |
31 | |
32 | #include <asm/addrspace.h> | |
33 | #include <asm/bootinfo.h> | |
20d60d99 | 34 | #include <asm/bugs.h> |
ec74e361 | 35 | #include <asm/cache.h> |
e934945d | 36 | #include <asm/cdmm.h> |
1da177e4 | 37 | #include <asm/cpu.h> |
75dcfc1d | 38 | #include <asm/debug.h> |
1da177e4 LT |
39 | #include <asm/sections.h> |
40 | #include <asm/setup.h> | |
87353d8a | 41 | #include <asm/smp-ops.h> |
f2ffa5ab | 42 | #include <asm/prom.h> |
1da177e4 | 43 | |
87db537d AK |
44 | #ifdef CONFIG_MIPS_ELF_APPENDED_DTB |
45 | const char __section(.appended_dtb) __appended_dtb[0x100000]; | |
46 | #endif /* CONFIG_MIPS_ELF_APPENDED_DTB */ | |
47 | ||
ec74e361 | 48 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
1da177e4 LT |
49 | |
50 | EXPORT_SYMBOL(cpu_data); | |
51 | ||
52 | #ifdef CONFIG_VT | |
53 | struct screen_info screen_info; | |
54 | #endif | |
55 | ||
1da177e4 LT |
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 | |
58cae9b0 JH |
91 | /* |
92 | * If the region reaches the top of the physical address space, adjust | |
93 | * the size slightly so that (start + size) doesn't overflow | |
94 | */ | |
95 | if (start + size - 1 == (phys_addr_t)ULLONG_MAX) | |
96 | --size; | |
97 | ||
b6f1f0de FBH |
98 | /* Sanity check */ |
99 | if (start + size < start) { | |
7178d2cd | 100 | pr_warn("Trying to add an invalid memory region, skipped\n"); |
b6f1f0de FBH |
101 | return; |
102 | } | |
103 | ||
1da177e4 | 104 | /* |
0ec7ec75 | 105 | * Try to merge with existing entry, if any. |
1da177e4 | 106 | */ |
0ec7ec75 RB |
107 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
108 | struct boot_mem_map_entry *entry = boot_mem_map.map + i; | |
109 | unsigned long top; | |
110 | ||
111 | if (entry->type != type) | |
112 | continue; | |
113 | ||
114 | if (start + size < entry->addr) | |
115 | continue; /* no overlap */ | |
116 | ||
117 | if (entry->addr + entry->size < start) | |
118 | continue; /* no overlap */ | |
119 | ||
120 | top = max(entry->addr + entry->size, start + size); | |
121 | entry->addr = min(entry->addr, start); | |
122 | entry->size = top - entry->addr; | |
123 | ||
1da177e4 LT |
124 | return; |
125 | } | |
126 | ||
0ec7ec75 | 127 | if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) { |
a64ae7a2 | 128 | pr_err("Ooops! Too many entries in the memory map!\n"); |
1da177e4 LT |
129 | return; |
130 | } | |
131 | ||
132 | boot_mem_map.map[x].addr = start; | |
133 | boot_mem_map.map[x].size = size; | |
134 | boot_mem_map.map[x].type = type; | |
135 | boot_mem_map.nr_map++; | |
136 | } | |
137 | ||
15d45cce | 138 | void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max) |
4d9f77d2 JC |
139 | { |
140 | void *dm = &detect_magic; | |
15d45cce | 141 | phys_addr_t size; |
4d9f77d2 JC |
142 | |
143 | for (size = sz_min; size < sz_max; size <<= 1) { | |
144 | if (!memcmp(dm, dm + size, sizeof(detect_magic))) | |
145 | break; | |
146 | } | |
147 | ||
148 | pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n", | |
149 | ((unsigned long long) size) / SZ_1M, | |
150 | (unsigned long long) start, | |
151 | ((unsigned long long) sz_min) / SZ_1M, | |
152 | ((unsigned long long) sz_max) / SZ_1M); | |
153 | ||
154 | add_memory_region(start, size, BOOT_MEM_RAM); | |
155 | } | |
156 | ||
d9b5b658 MN |
157 | bool __init memory_region_available(phys_addr_t start, phys_addr_t size) |
158 | { | |
159 | int i; | |
160 | bool in_ram = false, free = true; | |
161 | ||
162 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
163 | phys_addr_t start_, end_; | |
164 | ||
165 | start_ = boot_mem_map.map[i].addr; | |
166 | end_ = boot_mem_map.map[i].addr + boot_mem_map.map[i].size; | |
167 | ||
168 | switch (boot_mem_map.map[i].type) { | |
169 | case BOOT_MEM_RAM: | |
170 | if (start >= start_ && start + size <= end_) | |
171 | in_ram = true; | |
172 | break; | |
173 | case BOOT_MEM_RESERVED: | |
174 | if ((start >= start_ && start < end_) || | |
175 | (start < start_ && start + size >= start_)) | |
176 | free = false; | |
177 | break; | |
178 | default: | |
179 | continue; | |
180 | } | |
181 | } | |
182 | ||
183 | return in_ram && free; | |
184 | } | |
185 | ||
1da177e4 LT |
186 | static void __init print_memory_map(void) |
187 | { | |
188 | int i; | |
189 | const int field = 2 * sizeof(unsigned long); | |
190 | ||
191 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
a64ae7a2 | 192 | printk(KERN_INFO " memory: %0*Lx @ %0*Lx ", |
1da177e4 LT |
193 | field, (unsigned long long) boot_mem_map.map[i].size, |
194 | field, (unsigned long long) boot_mem_map.map[i].addr); | |
195 | ||
196 | switch (boot_mem_map.map[i].type) { | |
197 | case BOOT_MEM_RAM: | |
a64ae7a2 | 198 | printk(KERN_CONT "(usable)\n"); |
1da177e4 | 199 | break; |
43064c0c DD |
200 | case BOOT_MEM_INIT_RAM: |
201 | printk(KERN_CONT "(usable after init)\n"); | |
202 | break; | |
1da177e4 | 203 | case BOOT_MEM_ROM_DATA: |
a64ae7a2 | 204 | printk(KERN_CONT "(ROM data)\n"); |
1da177e4 LT |
205 | break; |
206 | case BOOT_MEM_RESERVED: | |
a64ae7a2 | 207 | printk(KERN_CONT "(reserved)\n"); |
1da177e4 LT |
208 | break; |
209 | default: | |
a64ae7a2 | 210 | printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type); |
1da177e4 LT |
211 | break; |
212 | } | |
213 | } | |
214 | } | |
215 | ||
d2043ca8 FBH |
216 | /* |
217 | * Manage initrd | |
218 | */ | |
219 | #ifdef CONFIG_BLK_DEV_INITRD | |
220 | ||
a09fc446 | 221 | static int __init rd_start_early(char *p) |
1da177e4 | 222 | { |
a09fc446 | 223 | unsigned long start = memparse(p, &p); |
1da177e4 | 224 | |
875d43e7 | 225 | #ifdef CONFIG_64BIT |
a7837b76 FBH |
226 | /* Guess if the sign extension was forgotten by bootloader */ |
227 | if (start < XKPHYS) | |
228 | start = (int)start; | |
1da177e4 | 229 | #endif |
a09fc446 FBH |
230 | initrd_start = start; |
231 | initrd_end += start; | |
a09fc446 FBH |
232 | return 0; |
233 | } | |
234 | early_param("rd_start", rd_start_early); | |
235 | ||
236 | static int __init rd_size_early(char *p) | |
237 | { | |
238 | initrd_end += memparse(p, &p); | |
1da177e4 LT |
239 | return 0; |
240 | } | |
a09fc446 | 241 | early_param("rd_size", rd_size_early); |
1da177e4 | 242 | |
a7837b76 | 243 | /* it returns the next free pfn after initrd */ |
d2043ca8 FBH |
244 | static unsigned long __init init_initrd(void) |
245 | { | |
a7837b76 | 246 | unsigned long end; |
d2043ca8 | 247 | |
d2043ca8 | 248 | /* |
a09fc446 FBH |
249 | * Board specific code or command line parser should have |
250 | * already set up initrd_start and initrd_end. In these cases | |
251 | * perfom sanity checks and use them if all looks good. | |
d2043ca8 | 252 | */ |
32028f1f | 253 | if (!initrd_start || initrd_end <= initrd_start) |
a7837b76 | 254 | goto disable; |
a7837b76 | 255 | |
a7837b76 | 256 | if (initrd_start & ~PAGE_MASK) { |
a64ae7a2 | 257 | pr_err("initrd start must be page aligned\n"); |
a7837b76 | 258 | goto disable; |
d2043ca8 | 259 | } |
a7837b76 | 260 | if (initrd_start < PAGE_OFFSET) { |
a64ae7a2 | 261 | pr_err("initrd start < PAGE_OFFSET\n"); |
a7837b76 FBH |
262 | goto disable; |
263 | } | |
264 | ||
265 | /* | |
266 | * Sanitize initrd addresses. For example firmware | |
267 | * can't guess if they need to pass them through | |
268 | * 64-bits values if the kernel has been built in pure | |
269 | * 32-bit. We need also to switch from KSEG0 to XKPHYS | |
270 | * addresses now, so the code can now safely use __pa(). | |
271 | */ | |
272 | end = __pa(initrd_end); | |
273 | initrd_end = (unsigned long)__va(end); | |
274 | initrd_start = (unsigned long)__va(__pa(initrd_start)); | |
275 | ||
276 | ROOT_DEV = Root_RAM0; | |
277 | return PFN_UP(end); | |
278 | disable: | |
279 | initrd_start = 0; | |
280 | initrd_end = 0; | |
281 | return 0; | |
d2043ca8 FBH |
282 | } |
283 | ||
8f4703aa AJ |
284 | /* In some conditions (e.g. big endian bootloader with a little endian |
285 | kernel), the initrd might appear byte swapped. Try to detect this and | |
286 | byte swap it if needed. */ | |
287 | static void __init maybe_bswap_initrd(void) | |
288 | { | |
289 | #if defined(CONFIG_CPU_CAVIUM_OCTEON) | |
290 | u64 buf; | |
291 | ||
292 | /* Check for CPIO signature */ | |
293 | if (!memcmp((void *)initrd_start, "070701", 6)) | |
294 | return; | |
295 | ||
296 | /* Check for compressed initrd */ | |
297 | if (decompress_method((unsigned char *)initrd_start, 8, NULL)) | |
298 | return; | |
299 | ||
300 | /* Try again with a byte swapped header */ | |
301 | buf = swab64p((u64 *)initrd_start); | |
302 | if (!memcmp(&buf, "070701", 6) || | |
303 | decompress_method((unsigned char *)(&buf), 8, NULL)) { | |
304 | unsigned long i; | |
305 | ||
306 | pr_info("Byteswapped initrd detected\n"); | |
307 | for (i = initrd_start; i < ALIGN(initrd_end, 8); i += 8) | |
308 | swab64s((u64 *)i); | |
309 | } | |
310 | #endif | |
311 | } | |
312 | ||
d2043ca8 FBH |
313 | static void __init finalize_initrd(void) |
314 | { | |
315 | unsigned long size = initrd_end - initrd_start; | |
316 | ||
317 | if (size == 0) { | |
318 | printk(KERN_INFO "Initrd not found or empty"); | |
319 | goto disable; | |
320 | } | |
d4df6d4e | 321 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
a64ae7a2 | 322 | printk(KERN_ERR "Initrd extends beyond end of memory"); |
d2043ca8 FBH |
323 | goto disable; |
324 | } | |
325 | ||
8f4703aa AJ |
326 | maybe_bswap_initrd(); |
327 | ||
72a7fe39 | 328 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
d2043ca8 FBH |
329 | initrd_below_start_ok = 1; |
330 | ||
a64ae7a2 MC |
331 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
332 | initrd_start, size); | |
d2043ca8 FBH |
333 | return; |
334 | disable: | |
a64ae7a2 | 335 | printk(KERN_CONT " - disabling initrd\n"); |
d2043ca8 FBH |
336 | initrd_start = 0; |
337 | initrd_end = 0; | |
338 | } | |
339 | ||
340 | #else /* !CONFIG_BLK_DEV_INITRD */ | |
341 | ||
9ba126cf RB |
342 | static unsigned long __init init_initrd(void) |
343 | { | |
344 | return 0; | |
345 | } | |
346 | ||
d2043ca8 FBH |
347 | #define finalize_initrd() do {} while (0) |
348 | ||
349 | #endif | |
350 | ||
b6f1f0de FBH |
351 | /* |
352 | * Initialize the bootmem allocator. It also setup initrd related data | |
353 | * if needed. | |
354 | */ | |
c4617318 | 355 | #if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA)) |
d2043ca8 | 356 | |
b6f1f0de | 357 | static void __init bootmem_init(void) |
1da177e4 | 358 | { |
d2043ca8 FBH |
359 | init_initrd(); |
360 | finalize_initrd(); | |
361 | } | |
362 | ||
363 | #else /* !CONFIG_SGI_IP27 */ | |
364 | ||
d9b5b658 MN |
365 | static unsigned long __init bootmap_bytes(unsigned long pages) |
366 | { | |
367 | unsigned long bytes = DIV_ROUND_UP(pages, 8); | |
368 | ||
369 | return ALIGN(bytes, sizeof(long)); | |
370 | } | |
371 | ||
d2043ca8 FBH |
372 | static void __init bootmem_init(void) |
373 | { | |
e452e94e | 374 | unsigned long reserved_end; |
db84dc61 | 375 | unsigned long mapstart = ~0UL; |
1da177e4 | 376 | unsigned long bootmap_size; |
d9b5b658 | 377 | bool bootmap_valid = false; |
1da177e4 | 378 | int i; |
1da177e4 LT |
379 | |
380 | /* | |
f9a7febd GU |
381 | * Sanity check any INITRD first. We don't take it into account |
382 | * for bootmem setup initially, rely on the end-of-kernel-code | |
383 | * as our memory range starting point. Once bootmem is inited we | |
384 | * will reserve the area used for the initrd. | |
1da177e4 | 385 | */ |
f9a7febd GU |
386 | init_initrd(); |
387 | reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end)); | |
1da177e4 | 388 | |
db84dc61 FBH |
389 | /* |
390 | * max_low_pfn is not a number of pages. The number of pages | |
391 | * of the system is given by 'max_low_pfn - min_low_pfn'. | |
392 | */ | |
393 | min_low_pfn = ~0UL; | |
394 | max_low_pfn = 0; | |
395 | ||
b6f1f0de FBH |
396 | /* |
397 | * Find the highest page frame number we have available. | |
398 | */ | |
1da177e4 LT |
399 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
400 | unsigned long start, end; | |
401 | ||
402 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
403 | continue; | |
404 | ||
405 | start = PFN_UP(boot_mem_map.map[i].addr); | |
406 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
b6f1f0de | 407 | + boot_mem_map.map[i].size); |
1da177e4 | 408 | |
16a767ec JH |
409 | #ifndef CONFIG_HIGHMEM |
410 | /* | |
411 | * Skip highmem here so we get an accurate max_low_pfn if low | |
412 | * memory stops short of high memory. | |
413 | * If the region overlaps HIGHMEM_START, end is clipped so | |
414 | * max_pfn excludes the highmem portion. | |
415 | */ | |
416 | if (start >= PFN_DOWN(HIGHMEM_START)) | |
417 | continue; | |
418 | if (end > PFN_DOWN(HIGHMEM_START)) | |
419 | end = PFN_DOWN(HIGHMEM_START); | |
420 | #endif | |
421 | ||
db84dc61 FBH |
422 | if (end > max_low_pfn) |
423 | max_low_pfn = end; | |
424 | if (start < min_low_pfn) | |
425 | min_low_pfn = start; | |
b6f1f0de | 426 | if (end <= reserved_end) |
1da177e4 | 427 | continue; |
a6335fa1 | 428 | #ifdef CONFIG_BLK_DEV_INITRD |
88d34269 | 429 | /* Skip zones before initrd and initrd itself */ |
a6335fa1 AS |
430 | if (initrd_end && end <= (unsigned long)PFN_UP(__pa(initrd_end))) |
431 | continue; | |
432 | #endif | |
b6f1f0de FBH |
433 | if (start >= mapstart) |
434 | continue; | |
435 | mapstart = max(reserved_end, start); | |
1da177e4 LT |
436 | } |
437 | ||
db84dc61 FBH |
438 | if (min_low_pfn >= max_low_pfn) |
439 | panic("Incorrect memory mapping !!!"); | |
6f284a2c | 440 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
441 | pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
442 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), | |
443 | min_low_pfn - ARCH_PFN_OFFSET); | |
6f284a2c | 444 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
445 | pr_info("%lu free pages won't be used\n", |
446 | ARCH_PFN_OFFSET - min_low_pfn); | |
db84dc61 | 447 | } |
6f284a2c | 448 | min_low_pfn = ARCH_PFN_OFFSET; |
db84dc61 | 449 | |
1da177e4 LT |
450 | /* |
451 | * Determine low and high memory ranges | |
452 | */ | |
dc3bf353 | 453 | max_pfn = max_low_pfn; |
db84dc61 | 454 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
b6f1f0de FBH |
455 | #ifdef CONFIG_HIGHMEM |
456 | highstart_pfn = PFN_DOWN(HIGHMEM_START); | |
db84dc61 | 457 | highend_pfn = max_low_pfn; |
1da177e4 | 458 | #endif |
db84dc61 | 459 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
1da177e4 LT |
460 | } |
461 | ||
88d34269 AS |
462 | #ifdef CONFIG_BLK_DEV_INITRD |
463 | /* | |
464 | * mapstart should be after initrd_end | |
465 | */ | |
466 | if (initrd_end) | |
467 | mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end))); | |
468 | #endif | |
469 | ||
1da177e4 | 470 | /* |
d9b5b658 MN |
471 | * check that mapstart doesn't overlap with any of |
472 | * memory regions that have been reserved through eg. DTB | |
1da177e4 | 473 | */ |
d9b5b658 MN |
474 | bootmap_size = bootmap_bytes(max_low_pfn - min_low_pfn); |
475 | ||
476 | bootmap_valid = memory_region_available(PFN_PHYS(mapstart), | |
477 | bootmap_size); | |
478 | for (i = 0; i < boot_mem_map.nr_map && !bootmap_valid; i++) { | |
479 | unsigned long mapstart_addr; | |
480 | ||
481 | switch (boot_mem_map.map[i].type) { | |
482 | case BOOT_MEM_RESERVED: | |
483 | mapstart_addr = PFN_ALIGN(boot_mem_map.map[i].addr + | |
484 | boot_mem_map.map[i].size); | |
485 | if (PHYS_PFN(mapstart_addr) < mapstart) | |
486 | break; | |
487 | ||
488 | bootmap_valid = memory_region_available(mapstart_addr, | |
489 | bootmap_size); | |
490 | if (bootmap_valid) | |
491 | mapstart = PHYS_PFN(mapstart_addr); | |
492 | break; | |
493 | default: | |
494 | break; | |
495 | } | |
496 | } | |
cce335ae | 497 | |
d9b5b658 MN |
498 | if (!bootmap_valid) |
499 | panic("No memory area to place a bootmap bitmap"); | |
500 | ||
501 | /* | |
502 | * Initialize the boot-time allocator with low memory only. | |
503 | */ | |
504 | if (bootmap_size != init_bootmem_node(NODE_DATA(0), mapstart, | |
505 | min_low_pfn, max_low_pfn)) | |
506 | panic("Unexpected memory size required for bootmap"); | |
cce335ae | 507 | |
cce335ae RB |
508 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
509 | unsigned long start, end; | |
510 | ||
511 | start = PFN_UP(boot_mem_map.map[i].addr); | |
512 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
513 | + boot_mem_map.map[i].size); | |
514 | ||
e452e94e AN |
515 | if (start <= min_low_pfn) |
516 | start = min_low_pfn; | |
cce335ae RB |
517 | if (start >= end) |
518 | continue; | |
519 | ||
520 | #ifndef CONFIG_HIGHMEM | |
521 | if (end > max_low_pfn) | |
522 | end = max_low_pfn; | |
523 | ||
524 | /* | |
525 | * ... finally, is the area going away? | |
526 | */ | |
527 | if (end <= start) | |
528 | continue; | |
529 | #endif | |
530 | ||
9d15ffc8 | 531 | memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0); |
cce335ae RB |
532 | } |
533 | ||
1da177e4 LT |
534 | /* |
535 | * Register fully available low RAM pages with the bootmem allocator. | |
536 | */ | |
537 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
b6f1f0de | 538 | unsigned long start, end, size; |
1da177e4 | 539 | |
43064c0c DD |
540 | start = PFN_UP(boot_mem_map.map[i].addr); |
541 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
542 | + boot_mem_map.map[i].size); | |
543 | ||
1da177e4 LT |
544 | /* |
545 | * Reserve usable memory. | |
546 | */ | |
43064c0c DD |
547 | switch (boot_mem_map.map[i].type) { |
548 | case BOOT_MEM_RAM: | |
549 | break; | |
550 | case BOOT_MEM_INIT_RAM: | |
551 | memory_present(0, start, end); | |
1da177e4 | 552 | continue; |
43064c0c DD |
553 | default: |
554 | /* Not usable memory */ | |
e89ef66d MN |
555 | if (start > min_low_pfn && end < max_low_pfn) |
556 | reserve_bootmem(boot_mem_map.map[i].addr, | |
557 | boot_mem_map.map[i].size, | |
558 | BOOTMEM_DEFAULT); | |
43064c0c DD |
559 | continue; |
560 | } | |
1da177e4 | 561 | |
1da177e4 | 562 | /* |
b6f1f0de FBH |
563 | * We are rounding up the start address of usable memory |
564 | * and at the end of the usable range downwards. | |
1da177e4 | 565 | */ |
b6f1f0de | 566 | if (start >= max_low_pfn) |
1da177e4 | 567 | continue; |
b6f1f0de FBH |
568 | if (start < reserved_end) |
569 | start = reserved_end; | |
570 | if (end > max_low_pfn) | |
571 | end = max_low_pfn; | |
1da177e4 LT |
572 | |
573 | /* | |
b6f1f0de | 574 | * ... finally, is the area going away? |
1da177e4 | 575 | */ |
b6f1f0de | 576 | if (end <= start) |
1da177e4 | 577 | continue; |
b6f1f0de | 578 | size = end - start; |
1da177e4 LT |
579 | |
580 | /* Register lowmem ranges */ | |
b6f1f0de FBH |
581 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
582 | memory_present(0, start, end); | |
1da177e4 LT |
583 | } |
584 | ||
b6f1f0de FBH |
585 | /* |
586 | * Reserve the bootmap memory. | |
587 | */ | |
72a7fe39 | 588 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT); |
b6f1f0de | 589 | |
61cd52d4 MR |
590 | #ifdef CONFIG_RELOCATABLE |
591 | /* | |
592 | * The kernel reserves all memory below its _end symbol as bootmem, | |
593 | * but the kernel may now be at a much higher address. The memory | |
594 | * between the original and new locations may be returned to the system. | |
595 | */ | |
596 | if (__pa_symbol(_text) > __pa_symbol(VMLINUX_LOAD_ADDRESS)) { | |
597 | unsigned long offset; | |
919beb4e | 598 | extern void show_kernel_relocation(const char *level); |
61cd52d4 MR |
599 | |
600 | offset = __pa_symbol(_text) - __pa_symbol(VMLINUX_LOAD_ADDRESS); | |
601 | free_bootmem(__pa_symbol(VMLINUX_LOAD_ADDRESS), offset); | |
919beb4e MR |
602 | |
603 | #if defined(CONFIG_DEBUG_KERNEL) && defined(CONFIG_DEBUG_INFO) | |
604 | /* | |
605 | * This information is necessary when debugging the kernel | |
606 | * But is a security vulnerability otherwise! | |
607 | */ | |
608 | show_kernel_relocation(KERN_INFO); | |
609 | #endif | |
61cd52d4 MR |
610 | } |
611 | #endif | |
612 | ||
d2043ca8 FBH |
613 | /* |
614 | * Reserve initrd memory if needed. | |
615 | */ | |
616 | finalize_initrd(); | |
1da177e4 LT |
617 | } |
618 | ||
d2043ca8 FBH |
619 | #endif /* CONFIG_SGI_IP27 */ |
620 | ||
2925aba4 | 621 | /* |
603e82ed | 622 | * arch_mem_init - initialize memory management subsystem |
2925aba4 RB |
623 | * |
624 | * o plat_mem_setup() detects the memory configuration and will record detected | |
625 | * memory areas using add_memory_region. | |
2925aba4 RB |
626 | * |
627 | * At this stage the memory configuration of the system is known to the | |
603e82ed | 628 | * kernel but generic memory management system is still entirely uninitialized. |
2925aba4 RB |
629 | * |
630 | * o bootmem_init() | |
631 | * o sparse_init() | |
632 | * o paging_init() | |
e1c05067 | 633 | * o dma_contiguous_reserve() |
2925aba4 RB |
634 | * |
635 | * At this stage the bootmem allocator is ready to use. | |
636 | * | |
637 | * NOTE: historically plat_mem_setup did the entire platform initialization. | |
70342287 | 638 | * This was rather impractical because it meant plat_mem_setup had to |
2925aba4 | 639 | * get away without any kind of memory allocator. To keep old code from |
7f0dd768 | 640 | * breaking plat_setup was just renamed to plat_mem_setup and a second platform |
2925aba4 RB |
641 | * initialization hook for anything else was introduced. |
642 | */ | |
643 | ||
982f6ffe | 644 | static int usermem __initdata; |
a09fc446 FBH |
645 | |
646 | static int __init early_parse_mem(char *p) | |
647 | { | |
ad8f723a | 648 | phys_addr_t start, size; |
a09fc446 FBH |
649 | |
650 | /* | |
651 | * If a user specifies memory size, we | |
652 | * blow away any automatically generated | |
653 | * size. | |
654 | */ | |
655 | if (usermem == 0) { | |
656 | boot_mem_map.nr_map = 0; | |
657 | usermem = 1; | |
70342287 | 658 | } |
a09fc446 FBH |
659 | start = 0; |
660 | size = memparse(p, &p); | |
661 | if (*p == '@') | |
662 | start = memparse(p + 1, &p); | |
663 | ||
664 | add_memory_region(start, size, BOOT_MEM_RAM); | |
73fbc1eb MN |
665 | |
666 | if (start && start > PHYS_OFFSET) | |
667 | add_memory_region(PHYS_OFFSET, start - PHYS_OFFSET, | |
668 | BOOT_MEM_RESERVED); | |
a09fc446 FBH |
669 | return 0; |
670 | } | |
671 | early_param("mem", early_parse_mem); | |
2925aba4 | 672 | |
296a7624 MD |
673 | static int __init early_parse_memmap(char *p) |
674 | { | |
675 | char *oldp; | |
676 | u64 start_at, mem_size; | |
677 | ||
678 | if (!p) | |
679 | return -EINVAL; | |
680 | ||
681 | if (!strncmp(p, "exactmap", 8)) { | |
682 | pr_err("\"memmap=exactmap\" invalid on MIPS\n"); | |
683 | return 0; | |
684 | } | |
685 | ||
686 | oldp = p; | |
687 | mem_size = memparse(p, &p); | |
688 | if (p == oldp) | |
689 | return -EINVAL; | |
690 | ||
691 | if (*p == '@') { | |
692 | start_at = memparse(p+1, &p); | |
693 | add_memory_region(start_at, mem_size, BOOT_MEM_RAM); | |
694 | } else if (*p == '#') { | |
695 | pr_err("\"memmap=nn#ss\" (force ACPI data) invalid on MIPS\n"); | |
696 | return -EINVAL; | |
697 | } else if (*p == '$') { | |
698 | start_at = memparse(p+1, &p); | |
699 | add_memory_region(start_at, mem_size, BOOT_MEM_RESERVED); | |
700 | } else { | |
701 | pr_err("\"memmap\" invalid format!\n"); | |
702 | return -EINVAL; | |
703 | } | |
704 | ||
705 | if (*p == '\0') { | |
706 | usermem = 1; | |
707 | return 0; | |
708 | } else | |
709 | return -EINVAL; | |
710 | } | |
711 | early_param("memmap", early_parse_memmap); | |
712 | ||
4893fc88 CM |
713 | #ifdef CONFIG_PROC_VMCORE |
714 | unsigned long setup_elfcorehdr, setup_elfcorehdr_size; | |
715 | static int __init early_parse_elfcorehdr(char *p) | |
716 | { | |
717 | int i; | |
718 | ||
719 | setup_elfcorehdr = memparse(p, &p); | |
720 | ||
721 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
722 | unsigned long start = boot_mem_map.map[i].addr; | |
723 | unsigned long end = (boot_mem_map.map[i].addr + | |
724 | boot_mem_map.map[i].size); | |
725 | if (setup_elfcorehdr >= start && setup_elfcorehdr < end) { | |
726 | /* | |
727 | * Reserve from the elf core header to the end of | |
728 | * the memory segment, that should all be kdump | |
729 | * reserved memory. | |
730 | */ | |
731 | setup_elfcorehdr_size = end - setup_elfcorehdr; | |
732 | break; | |
733 | } | |
734 | } | |
735 | /* | |
736 | * If we don't find it in the memory map, then we shouldn't | |
737 | * have to worry about it, as the new kernel won't use it. | |
738 | */ | |
739 | return 0; | |
740 | } | |
741 | early_param("elfcorehdr", early_parse_elfcorehdr); | |
742 | #endif | |
743 | ||
15d45cce | 744 | static void __init arch_mem_addpart(phys_addr_t mem, phys_addr_t end, int type) |
2925aba4 | 745 | { |
15d45cce | 746 | phys_addr_t size; |
d3ff9338 | 747 | int i; |
43064c0c | 748 | |
d3ff9338 CM |
749 | size = end - mem; |
750 | if (!size) | |
751 | return; | |
752 | ||
753 | /* Make sure it is in the boot_mem_map */ | |
754 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
755 | if (mem >= boot_mem_map.map[i].addr && | |
756 | mem < (boot_mem_map.map[i].addr + | |
757 | boot_mem_map.map[i].size)) | |
758 | return; | |
759 | } | |
760 | add_memory_region(mem, size, type); | |
761 | } | |
43064c0c | 762 | |
c2882b7f PM |
763 | #ifdef CONFIG_KEXEC |
764 | static inline unsigned long long get_total_mem(void) | |
765 | { | |
766 | unsigned long long total; | |
767 | ||
768 | total = max_pfn - min_low_pfn; | |
769 | return total << PAGE_SHIFT; | |
770 | } | |
771 | ||
772 | static void __init mips_parse_crashkernel(void) | |
773 | { | |
774 | unsigned long long total_mem; | |
775 | unsigned long long crash_size, crash_base; | |
776 | int ret; | |
777 | ||
778 | total_mem = get_total_mem(); | |
779 | ret = parse_crashkernel(boot_command_line, total_mem, | |
780 | &crash_size, &crash_base); | |
781 | if (ret != 0 || crash_size <= 0) | |
782 | return; | |
783 | ||
a8f108d7 MN |
784 | if (!memory_region_available(crash_base, crash_size)) { |
785 | pr_warn("Invalid memory region reserved for crash kernel\n"); | |
786 | return; | |
787 | } | |
788 | ||
c2882b7f PM |
789 | crashk_res.start = crash_base; |
790 | crashk_res.end = crash_base + crash_size - 1; | |
791 | } | |
792 | ||
793 | static void __init request_crashkernel(struct resource *res) | |
794 | { | |
795 | int ret; | |
796 | ||
269aa43a MN |
797 | if (crashk_res.start == crashk_res.end) |
798 | return; | |
799 | ||
c2882b7f PM |
800 | ret = request_resource(res, &crashk_res); |
801 | if (!ret) | |
802 | pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", | |
803 | (unsigned long)((crashk_res.end - | |
804 | crashk_res.start + 1) >> 20), | |
805 | (unsigned long)(crashk_res.start >> 20)); | |
806 | } | |
807 | #else /* !defined(CONFIG_KEXEC) */ | |
808 | static void __init mips_parse_crashkernel(void) | |
809 | { | |
810 | } | |
811 | ||
812 | static void __init request_crashkernel(struct resource *res) | |
813 | { | |
814 | } | |
815 | #endif /* !defined(CONFIG_KEXEC) */ | |
816 | ||
2024972e JG |
817 | #define USE_PROM_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER) |
818 | #define USE_DTB_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) | |
2549cc96 | 819 | #define EXTEND_WITH_PROM IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND) |
ed47e153 RV |
820 | #define BUILTIN_EXTEND_WITH_PROM \ |
821 | IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND) | |
2024972e | 822 | |
d3ff9338 CM |
823 | static void __init arch_mem_init(char **cmdline_p) |
824 | { | |
f4649382 | 825 | struct memblock_region *reg; |
a09fc446 FBH |
826 | extern void plat_mem_setup(void); |
827 | ||
2925aba4 RB |
828 | /* call board setup routine */ |
829 | plat_mem_setup(); | |
830 | ||
d3ff9338 CM |
831 | /* |
832 | * Make sure all kernel memory is in the maps. The "UP" and | |
833 | * "DOWN" are opposite for initdata since if it crosses over | |
834 | * into another memory section you don't want that to be | |
835 | * freed when the initdata is freed. | |
836 | */ | |
837 | arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT, | |
838 | PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT, | |
839 | BOOT_MEM_RAM); | |
840 | arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT, | |
841 | PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT, | |
842 | BOOT_MEM_INIT_RAM); | |
43064c0c | 843 | |
a64ae7a2 | 844 | pr_info("Determined physical RAM map:\n"); |
a09fc446 FBH |
845 | print_memory_map(); |
846 | ||
2024972e | 847 | #if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE) |
6acc7d48 DV |
848 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
849 | #else | |
2024972e JG |
850 | if ((USE_PROM_CMDLINE && arcs_cmdline[0]) || |
851 | (USE_DTB_CMDLINE && !boot_command_line[0])) | |
852 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
853 | ||
854 | if (EXTEND_WITH_PROM && arcs_cmdline[0]) { | |
e54ad8c5 RV |
855 | if (boot_command_line[0]) |
856 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); | |
2024972e JG |
857 | strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); |
858 | } | |
859 | ||
860 | #if defined(CONFIG_CMDLINE_BOOL) | |
6acc7d48 | 861 | if (builtin_cmdline[0]) { |
e54ad8c5 RV |
862 | if (boot_command_line[0]) |
863 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); | |
2024972e | 864 | strlcat(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
6acc7d48 | 865 | } |
ed47e153 RV |
866 | |
867 | if (BUILTIN_EXTEND_WITH_PROM && arcs_cmdline[0]) { | |
868 | if (boot_command_line[0]) | |
869 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); | |
870 | strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
871 | } | |
6acc7d48 | 872 | #endif |
6acc7d48 DV |
873 | #endif |
874 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); | |
2925aba4 RB |
875 | |
876 | *cmdline_p = command_line; | |
877 | ||
a09fc446 FBH |
878 | parse_early_param(); |
879 | ||
880 | if (usermem) { | |
a64ae7a2 | 881 | pr_info("User-defined physical RAM map:\n"); |
a09fc446 FBH |
882 | print_memory_map(); |
883 | } | |
884 | ||
73346081 MN |
885 | early_init_fdt_reserve_self(); |
886 | early_init_fdt_scan_reserved_mem(); | |
887 | ||
2925aba4 | 888 | bootmem_init(); |
4893fc88 CM |
889 | #ifdef CONFIG_PROC_VMCORE |
890 | if (setup_elfcorehdr && setup_elfcorehdr_size) { | |
891 | printk(KERN_INFO "kdump reserved memory at %lx-%lx\n", | |
892 | setup_elfcorehdr, setup_elfcorehdr_size); | |
893 | reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size, | |
894 | BOOTMEM_DEFAULT); | |
895 | } | |
896 | #endif | |
c2882b7f PM |
897 | |
898 | mips_parse_crashkernel(); | |
7aa1c8f4 RB |
899 | #ifdef CONFIG_KEXEC |
900 | if (crashk_res.start != crashk_res.end) | |
901 | reserve_bootmem(crashk_res.start, | |
902 | crashk_res.end - crashk_res.start + 1, | |
903 | BOOTMEM_DEFAULT); | |
904 | #endif | |
f2ffa5ab | 905 | device_tree_init(); |
2925aba4 | 906 | sparse_init(); |
ee71b7d2 | 907 | plat_swiotlb_setup(); |
f4649382 ZLK |
908 | |
909 | dma_contiguous_reserve(PFN_PHYS(max_low_pfn)); | |
910 | /* Tell bootmem about cma reserved memblock section */ | |
911 | for_each_memblock(reserved, reg) | |
30fa0530 ZLK |
912 | if (reg->size != 0) |
913 | reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); | |
a95d0692 HC |
914 | |
915 | reserve_bootmem_region(__pa_symbol(&__nosave_begin), | |
916 | __pa_symbol(&__nosave_end)); /* Reserve for hibernation */ | |
2925aba4 RB |
917 | } |
918 | ||
8df32c63 | 919 | static void __init resource_init(void) |
1da177e4 LT |
920 | { |
921 | int i; | |
922 | ||
6adb5fe7 RB |
923 | if (UNCAC_BASE != IO_BASE) |
924 | return; | |
925 | ||
f5bffe3a FBH |
926 | code_resource.start = __pa_symbol(&_text); |
927 | code_resource.end = __pa_symbol(&_etext) - 1; | |
928 | data_resource.start = __pa_symbol(&_etext); | |
929 | data_resource.end = __pa_symbol(&_edata) - 1; | |
1da177e4 | 930 | |
1da177e4 LT |
931 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
932 | struct resource *res; | |
933 | unsigned long start, end; | |
934 | ||
935 | start = boot_mem_map.map[i].addr; | |
936 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; | |
1c6fd44d | 937 | if (start >= HIGHMEM_START) |
1da177e4 | 938 | continue; |
1c6fd44d FBH |
939 | if (end >= HIGHMEM_START) |
940 | end = HIGHMEM_START - 1; | |
1da177e4 LT |
941 | |
942 | res = alloc_bootmem(sizeof(struct resource)); | |
35d98e93 TK |
943 | |
944 | res->start = start; | |
945 | res->end = end; | |
946 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
947 | ||
1da177e4 LT |
948 | switch (boot_mem_map.map[i].type) { |
949 | case BOOT_MEM_RAM: | |
43064c0c | 950 | case BOOT_MEM_INIT_RAM: |
1da177e4 LT |
951 | case BOOT_MEM_ROM_DATA: |
952 | res->name = "System RAM"; | |
35d98e93 | 953 | res->flags |= IORESOURCE_SYSRAM; |
1da177e4 LT |
954 | break; |
955 | case BOOT_MEM_RESERVED: | |
956 | default: | |
957 | res->name = "reserved"; | |
958 | } | |
959 | ||
1da177e4 LT |
960 | request_resource(&iomem_resource, res); |
961 | ||
962 | /* | |
963 | * We don't know which RAM region contains kernel data, | |
964 | * so we try it repeatedly and let the resource manager | |
965 | * test it. | |
966 | */ | |
967 | request_resource(res, &code_resource); | |
968 | request_resource(res, &data_resource); | |
7aa1c8f4 | 969 | request_crashkernel(res); |
1da177e4 LT |
970 | } |
971 | } | |
972 | ||
0f3f506b HC |
973 | #ifdef CONFIG_SMP |
974 | static void __init prefill_possible_map(void) | |
975 | { | |
976 | int i, possible = num_possible_cpus(); | |
977 | ||
978 | if (possible > nr_cpu_ids) | |
979 | possible = nr_cpu_ids; | |
980 | ||
981 | for (i = 0; i < possible; i++) | |
982 | set_cpu_possible(i, true); | |
983 | for (; i < NR_CPUS; i++) | |
984 | set_cpu_possible(i, false); | |
985 | ||
986 | nr_cpu_ids = possible; | |
987 | } | |
988 | #else | |
989 | static inline void prefill_possible_map(void) {} | |
990 | #endif | |
991 | ||
1da177e4 LT |
992 | void __init setup_arch(char **cmdline_p) |
993 | { | |
994 | cpu_probe(); | |
3af5a67c | 995 | mips_cm_probe(); |
1da177e4 | 996 | prom_init(); |
36a88530 | 997 | |
e934945d | 998 | setup_early_fdc_console(); |
36a88530 | 999 | #ifdef CONFIG_EARLY_PRINTK |
07cdb784 | 1000 | setup_early_printk(); |
36a88530 | 1001 | #endif |
1da177e4 | 1002 | cpu_report(); |
20d60d99 | 1003 | check_bugs_early(); |
1da177e4 LT |
1004 | |
1005 | #if defined(CONFIG_VT) | |
1006 | #if defined(CONFIG_VGA_CONSOLE) | |
e0daad44 | 1007 | conswitchp = &vga_con; |
1da177e4 | 1008 | #elif defined(CONFIG_DUMMY_CONSOLE) |
e0daad44 | 1009 | conswitchp = &dummy_con; |
1da177e4 LT |
1010 | #endif |
1011 | #endif | |
1012 | ||
2925aba4 | 1013 | arch_mem_init(cmdline_p); |
1da177e4 | 1014 | |
1da177e4 | 1015 | resource_init(); |
9b6695a8 | 1016 | plat_smp_setup(); |
0f3f506b | 1017 | prefill_possible_map(); |
6650df3c DD |
1018 | |
1019 | cpu_cache_init(); | |
058effe7 | 1020 | paging_init(); |
1da177e4 LT |
1021 | } |
1022 | ||
69a6c312 AN |
1023 | unsigned long kernelsp[NR_CPUS]; |
1024 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; | |
6312e0ee | 1025 | |
15f37e15 JG |
1026 | #ifdef CONFIG_USE_OF |
1027 | unsigned long fw_passed_dtb; | |
1028 | #endif | |
1029 | ||
6312e0ee AN |
1030 | #ifdef CONFIG_DEBUG_FS |
1031 | struct dentry *mips_debugfs_dir; | |
1032 | static int __init debugfs_mips(void) | |
1033 | { | |
1034 | struct dentry *d; | |
1035 | ||
1036 | d = debugfs_create_dir("mips", NULL); | |
b517531c Z |
1037 | if (!d) |
1038 | return -ENOMEM; | |
6312e0ee AN |
1039 | mips_debugfs_dir = d; |
1040 | return 0; | |
1041 | } | |
1042 | arch_initcall(debugfs_mips); | |
1043 | #endif |