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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 LT |
62 | #include <bios_ebda.h> |
63 | ||
64 | /* This value is set up by the early boot code to point to the value | |
65 | immediately after the boot time page tables. It contains a *physical* | |
66 | address, and must not be in the .bss segment! */ | |
67 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
68 | ||
0bb3184d | 69 | int disable_pse __devinitdata = 0; |
1da177e4 LT |
70 | |
71 | /* | |
72 | * Machine setup.. | |
73 | */ | |
269c2d81 | 74 | extern struct resource code_resource; |
75 | extern struct resource data_resource; | |
1da177e4 LT |
76 | |
77 | /* cpu data as detected by the assembly code in head.S */ | |
4a5d107a | 78 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
1da177e4 | 79 | /* common cpu data for all cpus */ |
c3d8c141 | 80 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
129f6946 | 81 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 LT |
82 | |
83 | unsigned long mmu_cr4_features; | |
84 | ||
1da177e4 LT |
85 | /* for MCA, but anyone else can use it if they want */ |
86 | unsigned int machine_id; | |
129f6946 AD |
87 | #ifdef CONFIG_MCA |
88 | EXPORT_SYMBOL(machine_id); | |
89 | #endif | |
1da177e4 LT |
90 | unsigned int machine_submodel_id; |
91 | unsigned int BIOS_revision; | |
92 | unsigned int mca_pentium_flag; | |
93 | ||
1da177e4 LT |
94 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
95 | int bootloader_type; | |
96 | ||
97 | /* user-defined highmem size */ | |
98 | static unsigned int highmem_pages = -1; | |
99 | ||
100 | /* | |
101 | * Setup options | |
102 | */ | |
1da177e4 | 103 | struct screen_info screen_info; |
129f6946 | 104 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 105 | struct apm_info apm_info; |
129f6946 | 106 | EXPORT_SYMBOL(apm_info); |
1da177e4 | 107 | struct edid_info edid_info; |
5e518d76 | 108 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 109 | struct ist_info ist_info; |
129f6946 AD |
110 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
111 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
112 | EXPORT_SYMBOL(ist_info); | |
113 | #endif | |
1da177e4 LT |
114 | |
115 | extern void early_cpu_init(void); | |
1da177e4 LT |
116 | extern int root_mountflags; |
117 | ||
118 | unsigned long saved_videomode; | |
119 | ||
120 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
121 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
122 | #define RAMDISK_LOAD_FLAG 0x4000 | |
123 | ||
4e498b66 | 124 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 | 125 | |
48c7ae67 | 126 | struct boot_params __initdata boot_params; |
1da177e4 | 127 | |
1da177e4 LT |
128 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
129 | struct edd edd; | |
130 | #ifdef CONFIG_EDD_MODULE | |
131 | EXPORT_SYMBOL(edd); | |
132 | #endif | |
133 | /** | |
134 | * copy_edd() - Copy the BIOS EDD information | |
135 | * from boot_params into a safe place. | |
136 | * | |
137 | */ | |
138 | static inline void copy_edd(void) | |
139 | { | |
30c82645 PA |
140 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
141 | sizeof(edd.mbr_signature)); | |
142 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
143 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
144 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
145 | } |
146 | #else | |
147 | static inline void copy_edd(void) | |
148 | { | |
149 | } | |
150 | #endif | |
151 | ||
cef518e8 | 152 | int __initdata user_defined_memmap = 0; |
1da177e4 | 153 | |
1a3f239d RR |
154 | /* |
155 | * "mem=nopentium" disables the 4MB page tables. | |
156 | * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM | |
157 | * to <mem>, overriding the bios size. | |
158 | * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from | |
159 | * <start> to <start>+<mem>, overriding the bios size. | |
160 | * | |
161 | * HPA tells me bootloaders need to parse mem=, so no new | |
162 | * option should be mem= [also see Documentation/i386/boot.txt] | |
163 | */ | |
164 | static int __init parse_mem(char *arg) | |
165 | { | |
166 | if (!arg) | |
167 | return -EINVAL; | |
1da177e4 | 168 | |
1a3f239d RR |
169 | if (strcmp(arg, "nopentium") == 0) { |
170 | clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability); | |
171 | disable_pse = 1; | |
172 | } else { | |
173 | /* If the user specifies memory size, we | |
174 | * limit the BIOS-provided memory map to | |
175 | * that size. exactmap can be used to specify | |
176 | * the exact map. mem=number can be used to | |
177 | * trim the existing memory map. | |
1da177e4 | 178 | */ |
1a3f239d | 179 | unsigned long long mem_size; |
1da177e4 | 180 | |
1a3f239d RR |
181 | mem_size = memparse(arg, &arg); |
182 | limit_regions(mem_size); | |
183 | user_defined_memmap = 1; | |
184 | } | |
185 | return 0; | |
186 | } | |
187 | early_param("mem", parse_mem); | |
1da177e4 | 188 | |
1a3f239d RR |
189 | #ifdef CONFIG_PROC_VMCORE |
190 | /* elfcorehdr= specifies the location of elf core header | |
191 | * stored by the crashed kernel. | |
192 | */ | |
193 | static int __init parse_elfcorehdr(char *arg) | |
194 | { | |
195 | if (!arg) | |
196 | return -EINVAL; | |
66759a01 | 197 | |
1a3f239d RR |
198 | elfcorehdr_addr = memparse(arg, &arg); |
199 | return 0; | |
200 | } | |
201 | early_param("elfcorehdr", parse_elfcorehdr); | |
202 | #endif /* CONFIG_PROC_VMCORE */ | |
1da177e4 | 203 | |
1a3f239d RR |
204 | /* |
205 | * highmem=size forces highmem to be exactly 'size' bytes. | |
206 | * This works even on boxes that have no highmem otherwise. | |
207 | * This also works to reduce highmem size on bigger boxes. | |
208 | */ | |
209 | static int __init parse_highmem(char *arg) | |
210 | { | |
211 | if (!arg) | |
212 | return -EINVAL; | |
9635b47d | 213 | |
1a3f239d RR |
214 | highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT; |
215 | return 0; | |
216 | } | |
217 | early_param("highmem", parse_highmem); | |
9635b47d | 218 | |
1a3f239d RR |
219 | /* |
220 | * vmalloc=size forces the vmalloc area to be exactly 'size' | |
221 | * bytes. This can be used to increase (or decrease) the | |
222 | * vmalloc area - the default is 128m. | |
223 | */ | |
224 | static int __init parse_vmalloc(char *arg) | |
225 | { | |
226 | if (!arg) | |
227 | return -EINVAL; | |
1bc3b91a | 228 | |
1a3f239d RR |
229 | __VMALLOC_RESERVE = memparse(arg, &arg); |
230 | return 0; | |
1da177e4 | 231 | } |
1a3f239d | 232 | early_param("vmalloc", parse_vmalloc); |
1da177e4 | 233 | |
461a9aff ZA |
234 | /* |
235 | * reservetop=size reserves a hole at the top of the kernel address space which | |
236 | * a hypervisor can load into later. Needed for dynamically loaded hypervisors, | |
237 | * so relocating the fixmap can be done before paging initialization. | |
238 | */ | |
239 | static int __init parse_reservetop(char *arg) | |
240 | { | |
241 | unsigned long address; | |
242 | ||
243 | if (!arg) | |
244 | return -EINVAL; | |
245 | ||
246 | address = memparse(arg, &arg); | |
247 | reserve_top_address(address); | |
248 | return 0; | |
249 | } | |
250 | early_param("reservetop", parse_reservetop); | |
251 | ||
1da177e4 LT |
252 | /* |
253 | * Determine low and high memory ranges: | |
254 | */ | |
255 | unsigned long __init find_max_low_pfn(void) | |
256 | { | |
257 | unsigned long max_low_pfn; | |
258 | ||
259 | max_low_pfn = max_pfn; | |
260 | if (max_low_pfn > MAXMEM_PFN) { | |
261 | if (highmem_pages == -1) | |
262 | highmem_pages = max_pfn - MAXMEM_PFN; | |
263 | if (highmem_pages + MAXMEM_PFN < max_pfn) | |
264 | max_pfn = MAXMEM_PFN + highmem_pages; | |
265 | if (highmem_pages + MAXMEM_PFN > max_pfn) { | |
266 | printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages)); | |
267 | highmem_pages = 0; | |
268 | } | |
269 | max_low_pfn = MAXMEM_PFN; | |
270 | #ifndef CONFIG_HIGHMEM | |
271 | /* Maximum memory usable is what is directly addressable */ | |
272 | printk(KERN_WARNING "Warning only %ldMB will be used.\n", | |
273 | MAXMEM>>20); | |
274 | if (max_pfn > MAX_NONPAE_PFN) | |
c673f1a9 | 275 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 LT |
276 | else |
277 | printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); | |
278 | max_pfn = MAXMEM_PFN; | |
279 | #else /* !CONFIG_HIGHMEM */ | |
c673f1a9 | 280 | #ifndef CONFIG_HIGHMEM64G |
1da177e4 LT |
281 | if (max_pfn > MAX_NONPAE_PFN) { |
282 | max_pfn = MAX_NONPAE_PFN; | |
283 | printk(KERN_WARNING "Warning only 4GB will be used.\n"); | |
c673f1a9 | 284 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 | 285 | } |
c673f1a9 | 286 | #endif /* !CONFIG_HIGHMEM64G */ |
1da177e4 LT |
287 | #endif /* !CONFIG_HIGHMEM */ |
288 | } else { | |
289 | if (highmem_pages == -1) | |
290 | highmem_pages = 0; | |
291 | #ifdef CONFIG_HIGHMEM | |
292 | if (highmem_pages >= max_pfn) { | |
293 | printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn)); | |
294 | highmem_pages = 0; | |
295 | } | |
296 | if (highmem_pages) { | |
297 | if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){ | |
298 | printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages)); | |
299 | highmem_pages = 0; | |
300 | } | |
301 | max_low_pfn -= highmem_pages; | |
302 | } | |
303 | #else | |
304 | if (highmem_pages) | |
305 | printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n"); | |
306 | #endif | |
307 | } | |
308 | return max_low_pfn; | |
309 | } | |
310 | ||
1da177e4 LT |
311 | /* |
312 | * workaround for Dell systems that neglect to reserve EBDA | |
313 | */ | |
314 | static void __init reserve_ebda_region(void) | |
315 | { | |
316 | unsigned int addr; | |
317 | addr = get_bios_ebda(); | |
318 | if (addr) | |
319 | reserve_bootmem(addr, PAGE_SIZE); | |
320 | } | |
321 | ||
05b79bdc | 322 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
1da177e4 LT |
323 | void __init setup_bootmem_allocator(void); |
324 | static unsigned long __init setup_memory(void) | |
325 | { | |
326 | /* | |
327 | * partially used pages are not usable - thus | |
328 | * we are rounding upwards: | |
329 | */ | |
330 | min_low_pfn = PFN_UP(init_pg_tables_end); | |
331 | ||
332 | find_max_pfn(); | |
333 | ||
334 | max_low_pfn = find_max_low_pfn(); | |
335 | ||
336 | #ifdef CONFIG_HIGHMEM | |
337 | highstart_pfn = highend_pfn = max_pfn; | |
338 | if (max_pfn > max_low_pfn) { | |
339 | highstart_pfn = max_low_pfn; | |
340 | } | |
341 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", | |
342 | pages_to_mb(highend_pfn - highstart_pfn)); | |
ba9c231f JB |
343 | num_physpages = highend_pfn; |
344 | high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; | |
345 | #else | |
346 | num_physpages = max_low_pfn; | |
347 | high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; | |
348 | #endif | |
349 | #ifdef CONFIG_FLATMEM | |
350 | max_mapnr = num_physpages; | |
1da177e4 LT |
351 | #endif |
352 | printk(KERN_NOTICE "%ldMB LOWMEM available.\n", | |
353 | pages_to_mb(max_low_pfn)); | |
354 | ||
355 | setup_bootmem_allocator(); | |
356 | ||
357 | return max_low_pfn; | |
358 | } | |
359 | ||
360 | void __init zone_sizes_init(void) | |
361 | { | |
6391af17 MG |
362 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
363 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); | |
364 | max_zone_pfns[ZONE_DMA] = | |
365 | virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; | |
366 | max_zone_pfns[ZONE_NORMAL] = max_low_pfn; | |
1da177e4 | 367 | #ifdef CONFIG_HIGHMEM |
6391af17 | 368 | max_zone_pfns[ZONE_HIGHMEM] = highend_pfn; |
4cfee88a MG |
369 | add_active_range(0, 0, highend_pfn); |
370 | #else | |
4cfee88a | 371 | add_active_range(0, 0, max_low_pfn); |
1da177e4 | 372 | #endif |
4cfee88a MG |
373 | |
374 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
375 | } |
376 | #else | |
05b79bdc | 377 | extern unsigned long __init setup_memory(void); |
1da177e4 | 378 | extern void zone_sizes_init(void); |
05b79bdc | 379 | #endif /* !CONFIG_NEED_MULTIPLE_NODES */ |
1da177e4 | 380 | |
d62cc471 BW |
381 | static inline unsigned long long get_total_mem(void) |
382 | { | |
383 | unsigned long long total; | |
384 | ||
385 | total = max_low_pfn - min_low_pfn; | |
386 | #ifdef CONFIG_HIGHMEM | |
387 | total += highend_pfn - highstart_pfn; | |
388 | #endif | |
389 | ||
390 | return total << PAGE_SHIFT; | |
391 | } | |
392 | ||
393 | #ifdef CONFIG_KEXEC | |
394 | static void __init reserve_crashkernel(void) | |
395 | { | |
396 | unsigned long long total_mem; | |
397 | unsigned long long crash_size, crash_base; | |
398 | int ret; | |
399 | ||
400 | total_mem = get_total_mem(); | |
401 | ||
402 | ret = parse_crashkernel(boot_command_line, total_mem, | |
403 | &crash_size, &crash_base); | |
404 | if (ret == 0 && crash_size > 0) { | |
405 | if (crash_base > 0) { | |
406 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
407 | "for crashkernel (System RAM: %ldMB)\n", | |
408 | (unsigned long)(crash_size >> 20), | |
409 | (unsigned long)(crash_base >> 20), | |
410 | (unsigned long)(total_mem >> 20)); | |
411 | crashk_res.start = crash_base; | |
412 | crashk_res.end = crash_base + crash_size - 1; | |
413 | reserve_bootmem(crash_base, crash_size); | |
414 | } else | |
415 | printk(KERN_INFO "crashkernel reservation failed - " | |
416 | "you have to specify a base address\n"); | |
417 | } | |
418 | } | |
419 | #else | |
420 | static inline void __init reserve_crashkernel(void) | |
421 | {} | |
422 | #endif | |
423 | ||
1da177e4 LT |
424 | void __init setup_bootmem_allocator(void) |
425 | { | |
426 | unsigned long bootmap_size; | |
427 | /* | |
428 | * Initialize the boot-time allocator (with low memory only): | |
429 | */ | |
430 | bootmap_size = init_bootmem(min_low_pfn, max_low_pfn); | |
431 | ||
432 | register_bootmem_low_pages(max_low_pfn); | |
433 | ||
434 | /* | |
435 | * Reserve the bootmem bitmap itself as well. We do this in two | |
436 | * steps (first step was init_bootmem()) because this catches | |
437 | * the (very unlikely) case of us accidentally initializing the | |
438 | * bootmem allocator with an invalid RAM area. | |
439 | */ | |
8621b81c EB |
440 | reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) + |
441 | bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text)); | |
1da177e4 LT |
442 | |
443 | /* | |
444 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
445 | * enabling clean reboots, SMP operation, laptop functions. | |
446 | */ | |
447 | reserve_bootmem(0, PAGE_SIZE); | |
448 | ||
449 | /* reserve EBDA region, it's a 4K region */ | |
450 | reserve_ebda_region(); | |
451 | ||
452 | /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent | |
453 | PCI prefetch into it (errata #56). Usually the page is reserved anyways, | |
454 | unless you have no PS/2 mouse plugged in. */ | |
455 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && | |
456 | boot_cpu_data.x86 == 6) | |
457 | reserve_bootmem(0xa0000 - 4096, 4096); | |
458 | ||
459 | #ifdef CONFIG_SMP | |
460 | /* | |
461 | * But first pinch a few for the stack/trampoline stuff | |
462 | * FIXME: Don't need the extra page at 4K, but need to fix | |
463 | * trampoline before removing it. (see the GDT stuff) | |
464 | */ | |
465 | reserve_bootmem(PAGE_SIZE, PAGE_SIZE); | |
466 | #endif | |
673d5b43 | 467 | #ifdef CONFIG_ACPI_SLEEP |
1da177e4 LT |
468 | /* |
469 | * Reserve low memory region for sleep support. | |
470 | */ | |
471 | acpi_reserve_bootmem(); | |
472 | #endif | |
473 | #ifdef CONFIG_X86_FIND_SMP_CONFIG | |
474 | /* | |
475 | * Find and reserve possible boot-time SMP configuration: | |
476 | */ | |
477 | find_smp_config(); | |
478 | #endif | |
91023300 | 479 | numa_kva_reserve(); |
1da177e4 | 480 | #ifdef CONFIG_BLK_DEV_INITRD |
30c82645 PA |
481 | if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) { |
482 | unsigned long ramdisk_image = boot_params.hdr.ramdisk_image; | |
483 | unsigned long ramdisk_size = boot_params.hdr.ramdisk_size; | |
484 | unsigned long ramdisk_end = ramdisk_image + ramdisk_size; | |
485 | unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
486 | ||
487 | if (ramdisk_end <= end_of_lowmem) { | |
488 | reserve_bootmem(ramdisk_image, ramdisk_size); | |
489 | initrd_start = ramdisk_image + PAGE_OFFSET; | |
490 | initrd_end = initrd_start+ramdisk_size; | |
491 | } else { | |
1da177e4 | 492 | printk(KERN_ERR "initrd extends beyond end of memory " |
30c82645 PA |
493 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", |
494 | ramdisk_end, end_of_lowmem); | |
1da177e4 LT |
495 | initrd_start = 0; |
496 | } | |
497 | } | |
498 | #endif | |
d62cc471 | 499 | reserve_crashkernel(); |
1da177e4 LT |
500 | } |
501 | ||
502 | /* | |
503 | * The node 0 pgdat is initialized before all of these because | |
504 | * it's needed for bootmem. node>0 pgdats have their virtual | |
505 | * space allocated before the pagetables are in place to access | |
506 | * them, so they can't be cleared then. | |
507 | * | |
508 | * This should all compile down to nothing when NUMA is off. | |
509 | */ | |
10079ae3 | 510 | static void __init remapped_pgdat_init(void) |
1da177e4 LT |
511 | { |
512 | int nid; | |
513 | ||
514 | for_each_online_node(nid) { | |
515 | if (nid != 0) | |
516 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
517 | } | |
518 | } | |
519 | ||
1da177e4 LT |
520 | #ifdef CONFIG_MCA |
521 | static void set_mca_bus(int x) | |
522 | { | |
523 | MCA_bus = x; | |
524 | } | |
525 | #else | |
526 | static void set_mca_bus(int x) { } | |
527 | #endif | |
528 | ||
d3561b7f | 529 | /* Overridden in paravirt.c if CONFIG_PARAVIRT */ |
88d20328 | 530 | char * __init __attribute__((weak)) memory_setup(void) |
d3561b7f RR |
531 | { |
532 | return machine_specific_memory_setup(); | |
533 | } | |
534 | ||
1da177e4 LT |
535 | /* |
536 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
537 | * passed the efi memmap, systab, etc., so we should use these data structures | |
538 | * for initialization. Note, the efi init code path is determined by the | |
539 | * global efi_enabled. This allows the same kernel image to be used on existing | |
540 | * systems (with a traditional BIOS) as well as on EFI systems. | |
541 | */ | |
542 | void __init setup_arch(char **cmdline_p) | |
543 | { | |
544 | unsigned long max_low_pfn; | |
545 | ||
546 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); | |
547 | pre_setup_arch_hook(); | |
548 | early_cpu_init(); | |
549 | ||
550 | /* | |
551 | * FIXME: This isn't an official loader_type right | |
552 | * now but does currently work with elilo. | |
553 | * If we were configured as an EFI kernel, check to make | |
554 | * sure that we were loaded correctly from elilo and that | |
555 | * the system table is valid. If not, then initialize normally. | |
556 | */ | |
557 | #ifdef CONFIG_EFI | |
30c82645 PA |
558 | if ((boot_params.hdr.type_of_loader == 0x50) && |
559 | boot_params.efi_info.efi_systab) | |
1da177e4 LT |
560 | efi_enabled = 1; |
561 | #endif | |
562 | ||
30c82645 PA |
563 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
564 | screen_info = boot_params.screen_info; | |
565 | edid_info = boot_params.edid_info; | |
566 | apm_info.bios = boot_params.apm_bios_info; | |
567 | ist_info = boot_params.ist_info; | |
568 | saved_videomode = boot_params.hdr.vid_mode; | |
569 | if( boot_params.sys_desc_table.length != 0 ) { | |
570 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); | |
571 | machine_id = boot_params.sys_desc_table.table[0]; | |
572 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
573 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 574 | } |
30c82645 | 575 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
576 | |
577 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
578 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
579 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
580 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 LT |
581 | #endif |
582 | ARCH_SETUP | |
583 | if (efi_enabled) | |
584 | efi_init(); | |
585 | else { | |
586 | printk(KERN_INFO "BIOS-provided physical RAM map:\n"); | |
d3561b7f | 587 | print_memory_map(memory_setup()); |
1da177e4 LT |
588 | } |
589 | ||
590 | copy_edd(); | |
591 | ||
30c82645 | 592 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
593 | root_mountflags &= ~MS_RDONLY; |
594 | init_mm.start_code = (unsigned long) _text; | |
595 | init_mm.end_code = (unsigned long) _etext; | |
596 | init_mm.end_data = (unsigned long) _edata; | |
597 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; | |
598 | ||
599 | code_resource.start = virt_to_phys(_text); | |
600 | code_resource.end = virt_to_phys(_etext)-1; | |
601 | data_resource.start = virt_to_phys(_etext); | |
602 | data_resource.end = virt_to_phys(_edata)-1; | |
603 | ||
1a3f239d | 604 | parse_early_param(); |
1da177e4 | 605 | |
1a3f239d RR |
606 | if (user_defined_memmap) { |
607 | printk(KERN_INFO "user-defined physical RAM map:\n"); | |
608 | print_memory_map("user"); | |
99b7de33 | 609 | } |
1a3f239d | 610 | |
4e498b66 | 611 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
1a3f239d | 612 | *cmdline_p = command_line; |
99b7de33 | 613 | |
1da177e4 LT |
614 | max_low_pfn = setup_memory(); |
615 | ||
7ce0bcfd ZA |
616 | #ifdef CONFIG_VMI |
617 | /* | |
618 | * Must be after max_low_pfn is determined, and before kernel | |
619 | * pagetables are setup. | |
620 | */ | |
621 | vmi_init(); | |
622 | #endif | |
623 | ||
1da177e4 LT |
624 | /* |
625 | * NOTE: before this point _nobody_ is allowed to allocate | |
626 | * any memory using the bootmem allocator. Although the | |
627 | * alloctor is now initialised only the first 8Mb of the kernel | |
628 | * virtual address space has been mapped. All allocations before | |
629 | * paging_init() has completed must use the alloc_bootmem_low_pages() | |
630 | * variant (which allocates DMA'able memory) and care must be taken | |
631 | * not to exceed the 8Mb limit. | |
632 | */ | |
633 | ||
634 | #ifdef CONFIG_SMP | |
635 | smp_alloc_memory(); /* AP processor realmode stacks in low memory*/ | |
636 | #endif | |
637 | paging_init(); | |
638 | remapped_pgdat_init(); | |
05b79bdc | 639 | sparse_init(); |
1da177e4 LT |
640 | zone_sizes_init(); |
641 | ||
642 | /* | |
643 | * NOTE: at this point the bootmem allocator is fully available. | |
644 | */ | |
645 | ||
6996d3b6 JF |
646 | paravirt_post_allocator_init(); |
647 | ||
1da177e4 LT |
648 | dmi_scan_machine(); |
649 | ||
650 | #ifdef CONFIG_X86_GENERICARCH | |
1a3f239d | 651 | generic_apic_probe(); |
1da177e4 LT |
652 | #endif |
653 | if (efi_enabled) | |
654 | efi_map_memmap(); | |
655 | ||
888ba6c6 | 656 | #ifdef CONFIG_ACPI |
1da177e4 LT |
657 | /* |
658 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
659 | */ | |
660 | acpi_boot_table_init(); | |
d44647b0 AC |
661 | #endif |
662 | ||
f157cbb1 | 663 | #ifdef CONFIG_PCI |
54ef3400 | 664 | early_quirks(); |
f157cbb1 | 665 | #endif |
d44647b0 AC |
666 | |
667 | #ifdef CONFIG_ACPI | |
1da177e4 LT |
668 | acpi_boot_init(); |
669 | ||
911a62d4 VP |
670 | #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) |
671 | if (def_to_bigsmp) | |
672 | printk(KERN_WARNING "More than 8 CPUs detected and " | |
673 | "CONFIG_X86_PC cannot handle it.\nUse " | |
674 | "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); | |
675 | #endif | |
676 | #endif | |
1da177e4 LT |
677 | #ifdef CONFIG_X86_LOCAL_APIC |
678 | if (smp_found_config) | |
679 | get_smp_config(); | |
680 | #endif | |
681 | ||
5c95da9f | 682 | e820_register_memory(); |
1c10070a | 683 | e820_mark_nosave_regions(); |
1da177e4 LT |
684 | |
685 | #ifdef CONFIG_VT | |
686 | #if defined(CONFIG_VGA_CONSOLE) | |
687 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
688 | conswitchp = &vga_con; | |
689 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
690 | conswitchp = &dummy_con; | |
691 | #endif | |
692 | #endif | |
693 | } |