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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1995 Linus Torvalds |
3 | * | |
4 | * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 | |
5 | * | |
6 | * Memory region support | |
7 | * David Parsons <orc@pell.chi.il.us>, July-August 1999 | |
8 | * | |
9 | * Added E820 sanitization routine (removes overlapping memory regions); | |
10 | * Brian Moyle <bmoyle@mvista.com>, February 2001 | |
11 | * | |
12 | * Moved CPU detection code to cpu/${cpu}.c | |
13 | * Patrick Mochel <mochel@osdl.org>, March 2002 | |
14 | * | |
15 | * Provisions for empty E820 memory regions (reported by certain BIOSes). | |
16 | * Alex Achenbach <xela@slit.de>, December 2002. | |
17 | * | |
18 | */ | |
19 | ||
20 | /* | |
21 | * This file handles the architecture-dependent parts of initialization | |
22 | */ | |
23 | ||
24 | #include <linux/sched.h> | |
25 | #include <linux/mm.h> | |
05b79bdc | 26 | #include <linux/mmzone.h> |
894673ee | 27 | #include <linux/screen_info.h> |
1da177e4 LT |
28 | #include <linux/ioport.h> |
29 | #include <linux/acpi.h> | |
30 | #include <linux/apm_bios.h> | |
31 | #include <linux/initrd.h> | |
32 | #include <linux/bootmem.h> | |
33 | #include <linux/seq_file.h> | |
34 | #include <linux/console.h> | |
35 | #include <linux/mca.h> | |
36 | #include <linux/root_dev.h> | |
37 | #include <linux/highmem.h> | |
38 | #include <linux/module.h> | |
39 | #include <linux/efi.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/edd.h> | |
42 | #include <linux/nodemask.h> | |
1bc3b91a | 43 | #include <linux/kexec.h> |
2030eae5 | 44 | #include <linux/crash_dump.h> |
e9928674 | 45 | #include <linux/dmi.h> |
22a9835c | 46 | #include <linux/pfn.h> |
1bc3b91a | 47 | |
1da177e4 | 48 | #include <video/edid.h> |
1bc3b91a | 49 | |
9635b47d | 50 | #include <asm/apic.h> |
1da177e4 LT |
51 | #include <asm/e820.h> |
52 | #include <asm/mpspec.h> | |
91023300 | 53 | #include <asm/mmzone.h> |
1da177e4 LT |
54 | #include <asm/setup.h> |
55 | #include <asm/arch_hooks.h> | |
56 | #include <asm/sections.h> | |
57 | #include <asm/io_apic.h> | |
58 | #include <asm/ist.h> | |
59 | #include <asm/io.h> | |
7ce0bcfd | 60 | #include <asm/vmi.h> |
e75eac33 | 61 | #include <setup_arch.h> |
1da177e4 | 62 | #include <bios_ebda.h> |
00bf4098 | 63 | #include <asm/cacheflush.h> |
1da177e4 LT |
64 | |
65 | /* This value is set up by the early boot code to point to the value | |
66 | immediately after the boot time page tables. It contains a *physical* | |
67 | address, and must not be in the .bss segment! */ | |
68 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
69 | ||
3d054f0f | 70 | int disable_pse __cpuinitdata = 0; |
1da177e4 LT |
71 | |
72 | /* | |
73 | * Machine setup.. | |
74 | */ | |
269c2d81 | 75 | extern struct resource code_resource; |
76 | extern struct resource data_resource; | |
00bf4098 | 77 | extern struct resource bss_resource; |
1da177e4 LT |
78 | |
79 | /* cpu data as detected by the assembly code in head.S */ | |
4a5d107a | 80 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
1da177e4 | 81 | /* common cpu data for all cpus */ |
c3d8c141 | 82 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
129f6946 | 83 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 LT |
84 | |
85 | unsigned long mmu_cr4_features; | |
86 | ||
1da177e4 LT |
87 | /* for MCA, but anyone else can use it if they want */ |
88 | unsigned int machine_id; | |
89 | unsigned int machine_submodel_id; | |
90 | unsigned int BIOS_revision; | |
91 | unsigned int mca_pentium_flag; | |
92 | ||
1da177e4 LT |
93 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
94 | int bootloader_type; | |
95 | ||
96 | /* user-defined highmem size */ | |
97 | static unsigned int highmem_pages = -1; | |
98 | ||
99 | /* | |
100 | * Setup options | |
101 | */ | |
1da177e4 | 102 | struct screen_info screen_info; |
129f6946 | 103 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 104 | struct apm_info apm_info; |
129f6946 | 105 | EXPORT_SYMBOL(apm_info); |
1da177e4 | 106 | struct edid_info edid_info; |
5e518d76 | 107 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 108 | struct ist_info ist_info; |
129f6946 AD |
109 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
110 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
111 | EXPORT_SYMBOL(ist_info); | |
112 | #endif | |
1da177e4 LT |
113 | |
114 | extern void early_cpu_init(void); | |
1da177e4 LT |
115 | extern int root_mountflags; |
116 | ||
117 | unsigned long saved_videomode; | |
118 | ||
119 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
120 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
121 | #define RAMDISK_LOAD_FLAG 0x4000 | |
122 | ||
4e498b66 | 123 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 | 124 | |
48c7ae67 | 125 | struct boot_params __initdata boot_params; |
1da177e4 | 126 | |
1da177e4 LT |
127 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
128 | struct edd edd; | |
129 | #ifdef CONFIG_EDD_MODULE | |
130 | EXPORT_SYMBOL(edd); | |
131 | #endif | |
132 | /** | |
133 | * copy_edd() - Copy the BIOS EDD information | |
134 | * from boot_params into a safe place. | |
135 | * | |
136 | */ | |
137 | static inline void copy_edd(void) | |
138 | { | |
30c82645 PA |
139 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
140 | sizeof(edd.mbr_signature)); | |
141 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
142 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
143 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
144 | } |
145 | #else | |
146 | static inline void copy_edd(void) | |
147 | { | |
148 | } | |
149 | #endif | |
150 | ||
cef518e8 | 151 | int __initdata user_defined_memmap = 0; |
1da177e4 | 152 | |
1a3f239d RR |
153 | /* |
154 | * "mem=nopentium" disables the 4MB page tables. | |
155 | * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM | |
156 | * to <mem>, overriding the bios size. | |
157 | * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from | |
158 | * <start> to <start>+<mem>, overriding the bios size. | |
159 | * | |
160 | * HPA tells me bootloaders need to parse mem=, so no new | |
161 | * option should be mem= [also see Documentation/i386/boot.txt] | |
162 | */ | |
163 | static int __init parse_mem(char *arg) | |
164 | { | |
165 | if (!arg) | |
166 | return -EINVAL; | |
1da177e4 | 167 | |
1a3f239d RR |
168 | if (strcmp(arg, "nopentium") == 0) { |
169 | clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability); | |
170 | disable_pse = 1; | |
171 | } else { | |
172 | /* If the user specifies memory size, we | |
173 | * limit the BIOS-provided memory map to | |
174 | * that size. exactmap can be used to specify | |
175 | * the exact map. mem=number can be used to | |
176 | * trim the existing memory map. | |
1da177e4 | 177 | */ |
1a3f239d | 178 | unsigned long long mem_size; |
1da177e4 | 179 | |
1a3f239d RR |
180 | mem_size = memparse(arg, &arg); |
181 | limit_regions(mem_size); | |
182 | user_defined_memmap = 1; | |
183 | } | |
184 | return 0; | |
185 | } | |
186 | early_param("mem", parse_mem); | |
1da177e4 | 187 | |
1a3f239d RR |
188 | #ifdef CONFIG_PROC_VMCORE |
189 | /* elfcorehdr= specifies the location of elf core header | |
190 | * stored by the crashed kernel. | |
191 | */ | |
192 | static int __init parse_elfcorehdr(char *arg) | |
193 | { | |
194 | if (!arg) | |
195 | return -EINVAL; | |
66759a01 | 196 | |
1a3f239d RR |
197 | elfcorehdr_addr = memparse(arg, &arg); |
198 | return 0; | |
199 | } | |
200 | early_param("elfcorehdr", parse_elfcorehdr); | |
201 | #endif /* CONFIG_PROC_VMCORE */ | |
1da177e4 | 202 | |
1a3f239d RR |
203 | /* |
204 | * highmem=size forces highmem to be exactly 'size' bytes. | |
205 | * This works even on boxes that have no highmem otherwise. | |
206 | * This also works to reduce highmem size on bigger boxes. | |
207 | */ | |
208 | static int __init parse_highmem(char *arg) | |
209 | { | |
210 | if (!arg) | |
211 | return -EINVAL; | |
9635b47d | 212 | |
1a3f239d RR |
213 | highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT; |
214 | return 0; | |
215 | } | |
216 | early_param("highmem", parse_highmem); | |
9635b47d | 217 | |
1a3f239d RR |
218 | /* |
219 | * vmalloc=size forces the vmalloc area to be exactly 'size' | |
220 | * bytes. This can be used to increase (or decrease) the | |
221 | * vmalloc area - the default is 128m. | |
222 | */ | |
223 | static int __init parse_vmalloc(char *arg) | |
224 | { | |
225 | if (!arg) | |
226 | return -EINVAL; | |
1bc3b91a | 227 | |
1a3f239d RR |
228 | __VMALLOC_RESERVE = memparse(arg, &arg); |
229 | return 0; | |
1da177e4 | 230 | } |
1a3f239d | 231 | early_param("vmalloc", parse_vmalloc); |
1da177e4 | 232 | |
461a9aff ZA |
233 | /* |
234 | * reservetop=size reserves a hole at the top of the kernel address space which | |
235 | * a hypervisor can load into later. Needed for dynamically loaded hypervisors, | |
236 | * so relocating the fixmap can be done before paging initialization. | |
237 | */ | |
238 | static int __init parse_reservetop(char *arg) | |
239 | { | |
240 | unsigned long address; | |
241 | ||
242 | if (!arg) | |
243 | return -EINVAL; | |
244 | ||
245 | address = memparse(arg, &arg); | |
246 | reserve_top_address(address); | |
247 | return 0; | |
248 | } | |
249 | early_param("reservetop", parse_reservetop); | |
250 | ||
1da177e4 LT |
251 | /* |
252 | * Determine low and high memory ranges: | |
253 | */ | |
254 | unsigned long __init find_max_low_pfn(void) | |
255 | { | |
256 | unsigned long max_low_pfn; | |
257 | ||
258 | max_low_pfn = max_pfn; | |
259 | if (max_low_pfn > MAXMEM_PFN) { | |
260 | if (highmem_pages == -1) | |
261 | highmem_pages = max_pfn - MAXMEM_PFN; | |
262 | if (highmem_pages + MAXMEM_PFN < max_pfn) | |
263 | max_pfn = MAXMEM_PFN + highmem_pages; | |
264 | if (highmem_pages + MAXMEM_PFN > max_pfn) { | |
265 | printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages)); | |
266 | highmem_pages = 0; | |
267 | } | |
268 | max_low_pfn = MAXMEM_PFN; | |
269 | #ifndef CONFIG_HIGHMEM | |
270 | /* Maximum memory usable is what is directly addressable */ | |
271 | printk(KERN_WARNING "Warning only %ldMB will be used.\n", | |
272 | MAXMEM>>20); | |
273 | if (max_pfn > MAX_NONPAE_PFN) | |
c673f1a9 | 274 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 LT |
275 | else |
276 | printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); | |
277 | max_pfn = MAXMEM_PFN; | |
278 | #else /* !CONFIG_HIGHMEM */ | |
c673f1a9 | 279 | #ifndef CONFIG_HIGHMEM64G |
1da177e4 LT |
280 | if (max_pfn > MAX_NONPAE_PFN) { |
281 | max_pfn = MAX_NONPAE_PFN; | |
282 | printk(KERN_WARNING "Warning only 4GB will be used.\n"); | |
c673f1a9 | 283 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 | 284 | } |
c673f1a9 | 285 | #endif /* !CONFIG_HIGHMEM64G */ |
1da177e4 LT |
286 | #endif /* !CONFIG_HIGHMEM */ |
287 | } else { | |
288 | if (highmem_pages == -1) | |
289 | highmem_pages = 0; | |
290 | #ifdef CONFIG_HIGHMEM | |
291 | if (highmem_pages >= max_pfn) { | |
292 | printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn)); | |
293 | highmem_pages = 0; | |
294 | } | |
295 | if (highmem_pages) { | |
296 | if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){ | |
297 | printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages)); | |
298 | highmem_pages = 0; | |
299 | } | |
300 | max_low_pfn -= highmem_pages; | |
301 | } | |
302 | #else | |
303 | if (highmem_pages) | |
304 | printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n"); | |
305 | #endif | |
306 | } | |
307 | return max_low_pfn; | |
308 | } | |
309 | ||
1da177e4 LT |
310 | /* |
311 | * workaround for Dell systems that neglect to reserve EBDA | |
312 | */ | |
313 | static void __init reserve_ebda_region(void) | |
314 | { | |
315 | unsigned int addr; | |
316 | addr = get_bios_ebda(); | |
317 | if (addr) | |
318 | reserve_bootmem(addr, PAGE_SIZE); | |
319 | } | |
320 | ||
05b79bdc | 321 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
1da177e4 LT |
322 | void __init setup_bootmem_allocator(void); |
323 | static unsigned long __init setup_memory(void) | |
324 | { | |
325 | /* | |
326 | * partially used pages are not usable - thus | |
327 | * we are rounding upwards: | |
328 | */ | |
329 | min_low_pfn = PFN_UP(init_pg_tables_end); | |
330 | ||
331 | find_max_pfn(); | |
332 | ||
333 | max_low_pfn = find_max_low_pfn(); | |
334 | ||
335 | #ifdef CONFIG_HIGHMEM | |
336 | highstart_pfn = highend_pfn = max_pfn; | |
337 | if (max_pfn > max_low_pfn) { | |
338 | highstart_pfn = max_low_pfn; | |
339 | } | |
340 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", | |
341 | pages_to_mb(highend_pfn - highstart_pfn)); | |
ba9c231f JB |
342 | num_physpages = highend_pfn; |
343 | high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; | |
344 | #else | |
345 | num_physpages = max_low_pfn; | |
346 | high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; | |
347 | #endif | |
348 | #ifdef CONFIG_FLATMEM | |
349 | max_mapnr = num_physpages; | |
1da177e4 LT |
350 | #endif |
351 | printk(KERN_NOTICE "%ldMB LOWMEM available.\n", | |
352 | pages_to_mb(max_low_pfn)); | |
353 | ||
354 | setup_bootmem_allocator(); | |
355 | ||
356 | return max_low_pfn; | |
357 | } | |
358 | ||
359 | void __init zone_sizes_init(void) | |
360 | { | |
6391af17 MG |
361 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
362 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); | |
363 | max_zone_pfns[ZONE_DMA] = | |
364 | virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; | |
365 | max_zone_pfns[ZONE_NORMAL] = max_low_pfn; | |
1da177e4 | 366 | #ifdef CONFIG_HIGHMEM |
6391af17 | 367 | max_zone_pfns[ZONE_HIGHMEM] = highend_pfn; |
4cfee88a MG |
368 | add_active_range(0, 0, highend_pfn); |
369 | #else | |
4cfee88a | 370 | add_active_range(0, 0, max_low_pfn); |
1da177e4 | 371 | #endif |
4cfee88a MG |
372 | |
373 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
374 | } |
375 | #else | |
05b79bdc | 376 | extern unsigned long __init setup_memory(void); |
1da177e4 | 377 | extern void zone_sizes_init(void); |
05b79bdc | 378 | #endif /* !CONFIG_NEED_MULTIPLE_NODES */ |
1da177e4 | 379 | |
d62cc471 BW |
380 | static inline unsigned long long get_total_mem(void) |
381 | { | |
382 | unsigned long long total; | |
383 | ||
384 | total = max_low_pfn - min_low_pfn; | |
385 | #ifdef CONFIG_HIGHMEM | |
386 | total += highend_pfn - highstart_pfn; | |
387 | #endif | |
388 | ||
389 | return total << PAGE_SHIFT; | |
390 | } | |
391 | ||
392 | #ifdef CONFIG_KEXEC | |
393 | static void __init reserve_crashkernel(void) | |
394 | { | |
395 | unsigned long long total_mem; | |
396 | unsigned long long crash_size, crash_base; | |
397 | int ret; | |
398 | ||
399 | total_mem = get_total_mem(); | |
400 | ||
401 | ret = parse_crashkernel(boot_command_line, total_mem, | |
402 | &crash_size, &crash_base); | |
403 | if (ret == 0 && crash_size > 0) { | |
404 | if (crash_base > 0) { | |
405 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
406 | "for crashkernel (System RAM: %ldMB)\n", | |
407 | (unsigned long)(crash_size >> 20), | |
408 | (unsigned long)(crash_base >> 20), | |
409 | (unsigned long)(total_mem >> 20)); | |
410 | crashk_res.start = crash_base; | |
411 | crashk_res.end = crash_base + crash_size - 1; | |
412 | reserve_bootmem(crash_base, crash_size); | |
413 | } else | |
414 | printk(KERN_INFO "crashkernel reservation failed - " | |
415 | "you have to specify a base address\n"); | |
416 | } | |
417 | } | |
418 | #else | |
419 | static inline void __init reserve_crashkernel(void) | |
420 | {} | |
421 | #endif | |
422 | ||
1da177e4 LT |
423 | void __init setup_bootmem_allocator(void) |
424 | { | |
425 | unsigned long bootmap_size; | |
426 | /* | |
427 | * Initialize the boot-time allocator (with low memory only): | |
428 | */ | |
429 | bootmap_size = init_bootmem(min_low_pfn, max_low_pfn); | |
430 | ||
431 | register_bootmem_low_pages(max_low_pfn); | |
432 | ||
433 | /* | |
434 | * Reserve the bootmem bitmap itself as well. We do this in two | |
435 | * steps (first step was init_bootmem()) because this catches | |
436 | * the (very unlikely) case of us accidentally initializing the | |
437 | * bootmem allocator with an invalid RAM area. | |
438 | */ | |
8621b81c EB |
439 | reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) + |
440 | bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text)); | |
1da177e4 LT |
441 | |
442 | /* | |
443 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
444 | * enabling clean reboots, SMP operation, laptop functions. | |
445 | */ | |
446 | reserve_bootmem(0, PAGE_SIZE); | |
447 | ||
448 | /* reserve EBDA region, it's a 4K region */ | |
449 | reserve_ebda_region(); | |
450 | ||
451 | /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent | |
452 | PCI prefetch into it (errata #56). Usually the page is reserved anyways, | |
453 | unless you have no PS/2 mouse plugged in. */ | |
454 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && | |
455 | boot_cpu_data.x86 == 6) | |
456 | reserve_bootmem(0xa0000 - 4096, 4096); | |
457 | ||
458 | #ifdef CONFIG_SMP | |
459 | /* | |
460 | * But first pinch a few for the stack/trampoline stuff | |
461 | * FIXME: Don't need the extra page at 4K, but need to fix | |
462 | * trampoline before removing it. (see the GDT stuff) | |
463 | */ | |
464 | reserve_bootmem(PAGE_SIZE, PAGE_SIZE); | |
465 | #endif | |
673d5b43 | 466 | #ifdef CONFIG_ACPI_SLEEP |
1da177e4 LT |
467 | /* |
468 | * Reserve low memory region for sleep support. | |
469 | */ | |
470 | acpi_reserve_bootmem(); | |
471 | #endif | |
472 | #ifdef CONFIG_X86_FIND_SMP_CONFIG | |
473 | /* | |
474 | * Find and reserve possible boot-time SMP configuration: | |
475 | */ | |
476 | find_smp_config(); | |
477 | #endif | |
91023300 | 478 | numa_kva_reserve(); |
1da177e4 | 479 | #ifdef CONFIG_BLK_DEV_INITRD |
30c82645 PA |
480 | if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) { |
481 | unsigned long ramdisk_image = boot_params.hdr.ramdisk_image; | |
482 | unsigned long ramdisk_size = boot_params.hdr.ramdisk_size; | |
483 | unsigned long ramdisk_end = ramdisk_image + ramdisk_size; | |
484 | unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
485 | ||
486 | if (ramdisk_end <= end_of_lowmem) { | |
487 | reserve_bootmem(ramdisk_image, ramdisk_size); | |
488 | initrd_start = ramdisk_image + PAGE_OFFSET; | |
489 | initrd_end = initrd_start+ramdisk_size; | |
490 | } else { | |
1da177e4 | 491 | printk(KERN_ERR "initrd extends beyond end of memory " |
30c82645 PA |
492 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", |
493 | ramdisk_end, end_of_lowmem); | |
1da177e4 LT |
494 | initrd_start = 0; |
495 | } | |
496 | } | |
497 | #endif | |
d62cc471 | 498 | reserve_crashkernel(); |
1da177e4 LT |
499 | } |
500 | ||
501 | /* | |
502 | * The node 0 pgdat is initialized before all of these because | |
503 | * it's needed for bootmem. node>0 pgdats have their virtual | |
504 | * space allocated before the pagetables are in place to access | |
505 | * them, so they can't be cleared then. | |
506 | * | |
507 | * This should all compile down to nothing when NUMA is off. | |
508 | */ | |
10079ae3 | 509 | static void __init remapped_pgdat_init(void) |
1da177e4 LT |
510 | { |
511 | int nid; | |
512 | ||
513 | for_each_online_node(nid) { | |
514 | if (nid != 0) | |
515 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
516 | } | |
517 | } | |
518 | ||
1da177e4 LT |
519 | #ifdef CONFIG_MCA |
520 | static void set_mca_bus(int x) | |
521 | { | |
522 | MCA_bus = x; | |
523 | } | |
524 | #else | |
525 | static void set_mca_bus(int x) { } | |
526 | #endif | |
527 | ||
d3561b7f | 528 | /* Overridden in paravirt.c if CONFIG_PARAVIRT */ |
88d20328 | 529 | char * __init __attribute__((weak)) memory_setup(void) |
d3561b7f RR |
530 | { |
531 | return machine_specific_memory_setup(); | |
532 | } | |
533 | ||
1da177e4 LT |
534 | /* |
535 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
536 | * passed the efi memmap, systab, etc., so we should use these data structures | |
537 | * for initialization. Note, the efi init code path is determined by the | |
538 | * global efi_enabled. This allows the same kernel image to be used on existing | |
539 | * systems (with a traditional BIOS) as well as on EFI systems. | |
540 | */ | |
541 | void __init setup_arch(char **cmdline_p) | |
542 | { | |
543 | unsigned long max_low_pfn; | |
544 | ||
545 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); | |
546 | pre_setup_arch_hook(); | |
547 | early_cpu_init(); | |
548 | ||
549 | /* | |
550 | * FIXME: This isn't an official loader_type right | |
551 | * now but does currently work with elilo. | |
552 | * If we were configured as an EFI kernel, check to make | |
553 | * sure that we were loaded correctly from elilo and that | |
554 | * the system table is valid. If not, then initialize normally. | |
555 | */ | |
556 | #ifdef CONFIG_EFI | |
30c82645 PA |
557 | if ((boot_params.hdr.type_of_loader == 0x50) && |
558 | boot_params.efi_info.efi_systab) | |
1da177e4 LT |
559 | efi_enabled = 1; |
560 | #endif | |
561 | ||
30c82645 PA |
562 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
563 | screen_info = boot_params.screen_info; | |
564 | edid_info = boot_params.edid_info; | |
565 | apm_info.bios = boot_params.apm_bios_info; | |
566 | ist_info = boot_params.ist_info; | |
567 | saved_videomode = boot_params.hdr.vid_mode; | |
568 | if( boot_params.sys_desc_table.length != 0 ) { | |
569 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); | |
570 | machine_id = boot_params.sys_desc_table.table[0]; | |
571 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
572 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 573 | } |
30c82645 | 574 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
575 | |
576 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
577 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
578 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
579 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 LT |
580 | #endif |
581 | ARCH_SETUP | |
582 | if (efi_enabled) | |
583 | efi_init(); | |
584 | else { | |
585 | printk(KERN_INFO "BIOS-provided physical RAM map:\n"); | |
d3561b7f | 586 | print_memory_map(memory_setup()); |
1da177e4 LT |
587 | } |
588 | ||
589 | copy_edd(); | |
590 | ||
30c82645 | 591 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
592 | root_mountflags &= ~MS_RDONLY; |
593 | init_mm.start_code = (unsigned long) _text; | |
594 | init_mm.end_code = (unsigned long) _etext; | |
595 | init_mm.end_data = (unsigned long) _edata; | |
596 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; | |
597 | ||
598 | code_resource.start = virt_to_phys(_text); | |
599 | code_resource.end = virt_to_phys(_etext)-1; | |
600 | data_resource.start = virt_to_phys(_etext); | |
601 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
602 | bss_resource.start = virt_to_phys(&__bss_start); |
603 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 604 | |
1a3f239d | 605 | parse_early_param(); |
1da177e4 | 606 | |
1a3f239d RR |
607 | if (user_defined_memmap) { |
608 | printk(KERN_INFO "user-defined physical RAM map:\n"); | |
609 | print_memory_map("user"); | |
99b7de33 | 610 | } |
1a3f239d | 611 | |
4e498b66 | 612 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
1a3f239d | 613 | *cmdline_p = command_line; |
99b7de33 | 614 | |
1da177e4 LT |
615 | max_low_pfn = setup_memory(); |
616 | ||
7ce0bcfd ZA |
617 | #ifdef CONFIG_VMI |
618 | /* | |
619 | * Must be after max_low_pfn is determined, and before kernel | |
620 | * pagetables are setup. | |
621 | */ | |
622 | vmi_init(); | |
623 | #endif | |
624 | ||
1da177e4 LT |
625 | /* |
626 | * NOTE: before this point _nobody_ is allowed to allocate | |
627 | * any memory using the bootmem allocator. Although the | |
27b46d76 | 628 | * allocator is now initialised only the first 8Mb of the kernel |
1da177e4 LT |
629 | * virtual address space has been mapped. All allocations before |
630 | * paging_init() has completed must use the alloc_bootmem_low_pages() | |
631 | * variant (which allocates DMA'able memory) and care must be taken | |
632 | * not to exceed the 8Mb limit. | |
633 | */ | |
634 | ||
635 | #ifdef CONFIG_SMP | |
636 | smp_alloc_memory(); /* AP processor realmode stacks in low memory*/ | |
637 | #endif | |
638 | paging_init(); | |
639 | remapped_pgdat_init(); | |
05b79bdc | 640 | sparse_init(); |
1da177e4 LT |
641 | zone_sizes_init(); |
642 | ||
643 | /* | |
644 | * NOTE: at this point the bootmem allocator is fully available. | |
645 | */ | |
646 | ||
6996d3b6 JF |
647 | paravirt_post_allocator_init(); |
648 | ||
1da177e4 LT |
649 | dmi_scan_machine(); |
650 | ||
b02aae9c RH |
651 | io_delay_init();; |
652 | ||
1da177e4 | 653 | #ifdef CONFIG_X86_GENERICARCH |
1a3f239d | 654 | generic_apic_probe(); |
1da177e4 LT |
655 | #endif |
656 | if (efi_enabled) | |
657 | efi_map_memmap(); | |
658 | ||
888ba6c6 | 659 | #ifdef CONFIG_ACPI |
1da177e4 LT |
660 | /* |
661 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
662 | */ | |
663 | acpi_boot_table_init(); | |
d44647b0 AC |
664 | #endif |
665 | ||
f157cbb1 | 666 | #ifdef CONFIG_PCI |
54ef3400 | 667 | early_quirks(); |
f157cbb1 | 668 | #endif |
d44647b0 AC |
669 | |
670 | #ifdef CONFIG_ACPI | |
1da177e4 LT |
671 | acpi_boot_init(); |
672 | ||
911a62d4 VP |
673 | #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) |
674 | if (def_to_bigsmp) | |
675 | printk(KERN_WARNING "More than 8 CPUs detected and " | |
676 | "CONFIG_X86_PC cannot handle it.\nUse " | |
677 | "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); | |
678 | #endif | |
679 | #endif | |
1da177e4 LT |
680 | #ifdef CONFIG_X86_LOCAL_APIC |
681 | if (smp_found_config) | |
682 | get_smp_config(); | |
683 | #endif | |
684 | ||
5c95da9f | 685 | e820_register_memory(); |
1c10070a | 686 | e820_mark_nosave_regions(); |
1da177e4 LT |
687 | |
688 | #ifdef CONFIG_VT | |
689 | #if defined(CONFIG_VGA_CONSOLE) | |
690 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
691 | conswitchp = &vga_con; | |
692 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
693 | conswitchp = &dummy_con; | |
694 | #endif | |
695 | #endif | |
696 | } |