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1da177e4 LT |
1 | /* |
2 | * linux/arch/i386/kernel/setup.c | |
3 | * | |
4 | * Copyright (C) 1995 Linus Torvalds | |
5 | * | |
6 | * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 | |
7 | * | |
8 | * Memory region support | |
9 | * David Parsons <orc@pell.chi.il.us>, July-August 1999 | |
10 | * | |
11 | * Added E820 sanitization routine (removes overlapping memory regions); | |
12 | * Brian Moyle <bmoyle@mvista.com>, February 2001 | |
13 | * | |
14 | * Moved CPU detection code to cpu/${cpu}.c | |
15 | * Patrick Mochel <mochel@osdl.org>, March 2002 | |
16 | * | |
17 | * Provisions for empty E820 memory regions (reported by certain BIOSes). | |
18 | * Alex Achenbach <xela@slit.de>, December 2002. | |
19 | * | |
20 | */ | |
21 | ||
22 | /* | |
23 | * This file handles the architecture-dependent parts of initialization | |
24 | */ | |
25 | ||
26 | #include <linux/sched.h> | |
27 | #include <linux/mm.h> | |
05b79bdc | 28 | #include <linux/mmzone.h> |
894673ee | 29 | #include <linux/screen_info.h> |
1da177e4 LT |
30 | #include <linux/ioport.h> |
31 | #include <linux/acpi.h> | |
32 | #include <linux/apm_bios.h> | |
33 | #include <linux/initrd.h> | |
34 | #include <linux/bootmem.h> | |
35 | #include <linux/seq_file.h> | |
36 | #include <linux/console.h> | |
37 | #include <linux/mca.h> | |
38 | #include <linux/root_dev.h> | |
39 | #include <linux/highmem.h> | |
40 | #include <linux/module.h> | |
41 | #include <linux/efi.h> | |
42 | #include <linux/init.h> | |
43 | #include <linux/edd.h> | |
44 | #include <linux/nodemask.h> | |
1bc3b91a | 45 | #include <linux/kexec.h> |
2030eae5 | 46 | #include <linux/crash_dump.h> |
e9928674 | 47 | #include <linux/dmi.h> |
22a9835c | 48 | #include <linux/pfn.h> |
1bc3b91a | 49 | |
1da177e4 | 50 | #include <video/edid.h> |
1bc3b91a | 51 | |
9635b47d | 52 | #include <asm/apic.h> |
1da177e4 LT |
53 | #include <asm/e820.h> |
54 | #include <asm/mpspec.h> | |
91023300 | 55 | #include <asm/mmzone.h> |
1da177e4 LT |
56 | #include <asm/setup.h> |
57 | #include <asm/arch_hooks.h> | |
58 | #include <asm/sections.h> | |
59 | #include <asm/io_apic.h> | |
60 | #include <asm/ist.h> | |
61 | #include <asm/io.h> | |
7ce0bcfd | 62 | #include <asm/vmi.h> |
e75eac33 | 63 | #include <setup_arch.h> |
1da177e4 LT |
64 | #include <bios_ebda.h> |
65 | ||
66 | /* This value is set up by the early boot code to point to the value | |
67 | immediately after the boot time page tables. It contains a *physical* | |
68 | address, and must not be in the .bss segment! */ | |
69 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
70 | ||
0bb3184d | 71 | int disable_pse __devinitdata = 0; |
1da177e4 LT |
72 | |
73 | /* | |
74 | * Machine setup.. | |
75 | */ | |
269c2d81 | 76 | extern struct resource code_resource; |
77 | extern struct resource data_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; | |
129f6946 AD |
89 | #ifdef CONFIG_MCA |
90 | EXPORT_SYMBOL(machine_id); | |
91 | #endif | |
1da177e4 LT |
92 | unsigned int machine_submodel_id; |
93 | unsigned int BIOS_revision; | |
94 | unsigned int mca_pentium_flag; | |
95 | ||
1da177e4 LT |
96 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
97 | int bootloader_type; | |
98 | ||
99 | /* user-defined highmem size */ | |
100 | static unsigned int highmem_pages = -1; | |
101 | ||
102 | /* | |
103 | * Setup options | |
104 | */ | |
1da177e4 | 105 | struct screen_info screen_info; |
129f6946 | 106 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 107 | struct apm_info apm_info; |
129f6946 | 108 | EXPORT_SYMBOL(apm_info); |
1da177e4 | 109 | struct edid_info edid_info; |
5e518d76 | 110 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 111 | struct ist_info ist_info; |
129f6946 AD |
112 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
113 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
114 | EXPORT_SYMBOL(ist_info); | |
115 | #endif | |
1da177e4 LT |
116 | |
117 | extern void early_cpu_init(void); | |
1da177e4 LT |
118 | extern int root_mountflags; |
119 | ||
120 | unsigned long saved_videomode; | |
121 | ||
122 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
123 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
124 | #define RAMDISK_LOAD_FLAG 0x4000 | |
125 | ||
4e498b66 | 126 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 | 127 | |
48c7ae67 | 128 | struct boot_params __initdata boot_params; |
1da177e4 | 129 | |
1da177e4 LT |
130 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
131 | struct edd edd; | |
132 | #ifdef CONFIG_EDD_MODULE | |
133 | EXPORT_SYMBOL(edd); | |
134 | #endif | |
135 | /** | |
136 | * copy_edd() - Copy the BIOS EDD information | |
137 | * from boot_params into a safe place. | |
138 | * | |
139 | */ | |
140 | static inline void copy_edd(void) | |
141 | { | |
142 | memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature)); | |
143 | memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info)); | |
144 | edd.mbr_signature_nr = EDD_MBR_SIG_NR; | |
145 | edd.edd_info_nr = EDD_NR; | |
146 | } | |
147 | #else | |
148 | static inline void copy_edd(void) | |
149 | { | |
150 | } | |
151 | #endif | |
152 | ||
cef518e8 | 153 | int __initdata user_defined_memmap = 0; |
1da177e4 | 154 | |
1a3f239d RR |
155 | /* |
156 | * "mem=nopentium" disables the 4MB page tables. | |
157 | * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM | |
158 | * to <mem>, overriding the bios size. | |
159 | * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from | |
160 | * <start> to <start>+<mem>, overriding the bios size. | |
161 | * | |
162 | * HPA tells me bootloaders need to parse mem=, so no new | |
163 | * option should be mem= [also see Documentation/i386/boot.txt] | |
164 | */ | |
165 | static int __init parse_mem(char *arg) | |
166 | { | |
167 | if (!arg) | |
168 | return -EINVAL; | |
1da177e4 | 169 | |
1a3f239d RR |
170 | if (strcmp(arg, "nopentium") == 0) { |
171 | clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability); | |
172 | disable_pse = 1; | |
173 | } else { | |
174 | /* If the user specifies memory size, we | |
175 | * limit the BIOS-provided memory map to | |
176 | * that size. exactmap can be used to specify | |
177 | * the exact map. mem=number can be used to | |
178 | * trim the existing memory map. | |
1da177e4 | 179 | */ |
1a3f239d | 180 | unsigned long long mem_size; |
1da177e4 | 181 | |
1a3f239d RR |
182 | mem_size = memparse(arg, &arg); |
183 | limit_regions(mem_size); | |
184 | user_defined_memmap = 1; | |
185 | } | |
186 | return 0; | |
187 | } | |
188 | early_param("mem", parse_mem); | |
1da177e4 | 189 | |
1a3f239d RR |
190 | #ifdef CONFIG_PROC_VMCORE |
191 | /* elfcorehdr= specifies the location of elf core header | |
192 | * stored by the crashed kernel. | |
193 | */ | |
194 | static int __init parse_elfcorehdr(char *arg) | |
195 | { | |
196 | if (!arg) | |
197 | return -EINVAL; | |
66759a01 | 198 | |
1a3f239d RR |
199 | elfcorehdr_addr = memparse(arg, &arg); |
200 | return 0; | |
201 | } | |
202 | early_param("elfcorehdr", parse_elfcorehdr); | |
203 | #endif /* CONFIG_PROC_VMCORE */ | |
1da177e4 | 204 | |
1a3f239d RR |
205 | /* |
206 | * highmem=size forces highmem to be exactly 'size' bytes. | |
207 | * This works even on boxes that have no highmem otherwise. | |
208 | * This also works to reduce highmem size on bigger boxes. | |
209 | */ | |
210 | static int __init parse_highmem(char *arg) | |
211 | { | |
212 | if (!arg) | |
213 | return -EINVAL; | |
9635b47d | 214 | |
1a3f239d RR |
215 | highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT; |
216 | return 0; | |
217 | } | |
218 | early_param("highmem", parse_highmem); | |
9635b47d | 219 | |
1a3f239d RR |
220 | /* |
221 | * vmalloc=size forces the vmalloc area to be exactly 'size' | |
222 | * bytes. This can be used to increase (or decrease) the | |
223 | * vmalloc area - the default is 128m. | |
224 | */ | |
225 | static int __init parse_vmalloc(char *arg) | |
226 | { | |
227 | if (!arg) | |
228 | return -EINVAL; | |
1bc3b91a | 229 | |
1a3f239d RR |
230 | __VMALLOC_RESERVE = memparse(arg, &arg); |
231 | return 0; | |
1da177e4 | 232 | } |
1a3f239d | 233 | early_param("vmalloc", parse_vmalloc); |
1da177e4 | 234 | |
461a9aff ZA |
235 | /* |
236 | * reservetop=size reserves a hole at the top of the kernel address space which | |
237 | * a hypervisor can load into later. Needed for dynamically loaded hypervisors, | |
238 | * so relocating the fixmap can be done before paging initialization. | |
239 | */ | |
240 | static int __init parse_reservetop(char *arg) | |
241 | { | |
242 | unsigned long address; | |
243 | ||
244 | if (!arg) | |
245 | return -EINVAL; | |
246 | ||
247 | address = memparse(arg, &arg); | |
248 | reserve_top_address(address); | |
249 | return 0; | |
250 | } | |
251 | early_param("reservetop", parse_reservetop); | |
252 | ||
1da177e4 LT |
253 | /* |
254 | * Determine low and high memory ranges: | |
255 | */ | |
256 | unsigned long __init find_max_low_pfn(void) | |
257 | { | |
258 | unsigned long max_low_pfn; | |
259 | ||
260 | max_low_pfn = max_pfn; | |
261 | if (max_low_pfn > MAXMEM_PFN) { | |
262 | if (highmem_pages == -1) | |
263 | highmem_pages = max_pfn - MAXMEM_PFN; | |
264 | if (highmem_pages + MAXMEM_PFN < max_pfn) | |
265 | max_pfn = MAXMEM_PFN + highmem_pages; | |
266 | if (highmem_pages + MAXMEM_PFN > max_pfn) { | |
267 | printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages)); | |
268 | highmem_pages = 0; | |
269 | } | |
270 | max_low_pfn = MAXMEM_PFN; | |
271 | #ifndef CONFIG_HIGHMEM | |
272 | /* Maximum memory usable is what is directly addressable */ | |
273 | printk(KERN_WARNING "Warning only %ldMB will be used.\n", | |
274 | MAXMEM>>20); | |
275 | if (max_pfn > MAX_NONPAE_PFN) | |
276 | printk(KERN_WARNING "Use a PAE enabled kernel.\n"); | |
277 | else | |
278 | printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); | |
279 | max_pfn = MAXMEM_PFN; | |
280 | #else /* !CONFIG_HIGHMEM */ | |
281 | #ifndef CONFIG_X86_PAE | |
282 | if (max_pfn > MAX_NONPAE_PFN) { | |
283 | max_pfn = MAX_NONPAE_PFN; | |
284 | printk(KERN_WARNING "Warning only 4GB will be used.\n"); | |
285 | printk(KERN_WARNING "Use a PAE enabled kernel.\n"); | |
286 | } | |
287 | #endif /* !CONFIG_X86_PAE */ | |
288 | #endif /* !CONFIG_HIGHMEM */ | |
289 | } else { | |
290 | if (highmem_pages == -1) | |
291 | highmem_pages = 0; | |
292 | #ifdef CONFIG_HIGHMEM | |
293 | if (highmem_pages >= max_pfn) { | |
294 | printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn)); | |
295 | highmem_pages = 0; | |
296 | } | |
297 | if (highmem_pages) { | |
298 | if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){ | |
299 | printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages)); | |
300 | highmem_pages = 0; | |
301 | } | |
302 | max_low_pfn -= highmem_pages; | |
303 | } | |
304 | #else | |
305 | if (highmem_pages) | |
306 | printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n"); | |
307 | #endif | |
308 | } | |
309 | return max_low_pfn; | |
310 | } | |
311 | ||
1da177e4 LT |
312 | /* |
313 | * workaround for Dell systems that neglect to reserve EBDA | |
314 | */ | |
315 | static void __init reserve_ebda_region(void) | |
316 | { | |
317 | unsigned int addr; | |
318 | addr = get_bios_ebda(); | |
319 | if (addr) | |
320 | reserve_bootmem(addr, PAGE_SIZE); | |
321 | } | |
322 | ||
05b79bdc | 323 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
1da177e4 LT |
324 | void __init setup_bootmem_allocator(void); |
325 | static unsigned long __init setup_memory(void) | |
326 | { | |
327 | /* | |
328 | * partially used pages are not usable - thus | |
329 | * we are rounding upwards: | |
330 | */ | |
331 | min_low_pfn = PFN_UP(init_pg_tables_end); | |
332 | ||
333 | find_max_pfn(); | |
334 | ||
335 | max_low_pfn = find_max_low_pfn(); | |
336 | ||
337 | #ifdef CONFIG_HIGHMEM | |
338 | highstart_pfn = highend_pfn = max_pfn; | |
339 | if (max_pfn > max_low_pfn) { | |
340 | highstart_pfn = max_low_pfn; | |
341 | } | |
342 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", | |
343 | pages_to_mb(highend_pfn - highstart_pfn)); | |
ba9c231f JB |
344 | num_physpages = highend_pfn; |
345 | high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; | |
346 | #else | |
347 | num_physpages = max_low_pfn; | |
348 | high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; | |
349 | #endif | |
350 | #ifdef CONFIG_FLATMEM | |
351 | max_mapnr = num_physpages; | |
1da177e4 LT |
352 | #endif |
353 | printk(KERN_NOTICE "%ldMB LOWMEM available.\n", | |
354 | pages_to_mb(max_low_pfn)); | |
355 | ||
356 | setup_bootmem_allocator(); | |
357 | ||
358 | return max_low_pfn; | |
359 | } | |
360 | ||
361 | void __init zone_sizes_init(void) | |
362 | { | |
6391af17 MG |
363 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
364 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); | |
365 | max_zone_pfns[ZONE_DMA] = | |
366 | virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; | |
367 | max_zone_pfns[ZONE_NORMAL] = max_low_pfn; | |
1da177e4 | 368 | #ifdef CONFIG_HIGHMEM |
6391af17 | 369 | max_zone_pfns[ZONE_HIGHMEM] = highend_pfn; |
4cfee88a MG |
370 | add_active_range(0, 0, highend_pfn); |
371 | #else | |
4cfee88a | 372 | add_active_range(0, 0, max_low_pfn); |
1da177e4 | 373 | #endif |
4cfee88a MG |
374 | |
375 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
376 | } |
377 | #else | |
05b79bdc | 378 | extern unsigned long __init setup_memory(void); |
1da177e4 | 379 | extern void zone_sizes_init(void); |
05b79bdc | 380 | #endif /* !CONFIG_NEED_MULTIPLE_NODES */ |
1da177e4 LT |
381 | |
382 | void __init setup_bootmem_allocator(void) | |
383 | { | |
384 | unsigned long bootmap_size; | |
385 | /* | |
386 | * Initialize the boot-time allocator (with low memory only): | |
387 | */ | |
388 | bootmap_size = init_bootmem(min_low_pfn, max_low_pfn); | |
389 | ||
390 | register_bootmem_low_pages(max_low_pfn); | |
391 | ||
392 | /* | |
393 | * Reserve the bootmem bitmap itself as well. We do this in two | |
394 | * steps (first step was init_bootmem()) because this catches | |
395 | * the (very unlikely) case of us accidentally initializing the | |
396 | * bootmem allocator with an invalid RAM area. | |
397 | */ | |
8621b81c EB |
398 | reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) + |
399 | bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text)); | |
1da177e4 LT |
400 | |
401 | /* | |
402 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
403 | * enabling clean reboots, SMP operation, laptop functions. | |
404 | */ | |
405 | reserve_bootmem(0, PAGE_SIZE); | |
406 | ||
407 | /* reserve EBDA region, it's a 4K region */ | |
408 | reserve_ebda_region(); | |
409 | ||
410 | /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent | |
411 | PCI prefetch into it (errata #56). Usually the page is reserved anyways, | |
412 | unless you have no PS/2 mouse plugged in. */ | |
413 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && | |
414 | boot_cpu_data.x86 == 6) | |
415 | reserve_bootmem(0xa0000 - 4096, 4096); | |
416 | ||
417 | #ifdef CONFIG_SMP | |
418 | /* | |
419 | * But first pinch a few for the stack/trampoline stuff | |
420 | * FIXME: Don't need the extra page at 4K, but need to fix | |
421 | * trampoline before removing it. (see the GDT stuff) | |
422 | */ | |
423 | reserve_bootmem(PAGE_SIZE, PAGE_SIZE); | |
424 | #endif | |
425 | #ifdef CONFIG_ACPI_SLEEP | |
426 | /* | |
427 | * Reserve low memory region for sleep support. | |
428 | */ | |
429 | acpi_reserve_bootmem(); | |
430 | #endif | |
431 | #ifdef CONFIG_X86_FIND_SMP_CONFIG | |
432 | /* | |
433 | * Find and reserve possible boot-time SMP configuration: | |
434 | */ | |
435 | find_smp_config(); | |
436 | #endif | |
91023300 | 437 | numa_kva_reserve(); |
1da177e4 LT |
438 | #ifdef CONFIG_BLK_DEV_INITRD |
439 | if (LOADER_TYPE && INITRD_START) { | |
440 | if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) { | |
441 | reserve_bootmem(INITRD_START, INITRD_SIZE); | |
19e5d9c0 | 442 | initrd_start = INITRD_START + PAGE_OFFSET; |
1da177e4 LT |
443 | initrd_end = initrd_start+INITRD_SIZE; |
444 | } | |
445 | else { | |
446 | printk(KERN_ERR "initrd extends beyond end of memory " | |
447 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
448 | INITRD_START + INITRD_SIZE, | |
449 | max_low_pfn << PAGE_SHIFT); | |
450 | initrd_start = 0; | |
451 | } | |
452 | } | |
453 | #endif | |
1bc3b91a EB |
454 | #ifdef CONFIG_KEXEC |
455 | if (crashk_res.start != crashk_res.end) | |
456 | reserve_bootmem(crashk_res.start, | |
457 | crashk_res.end - crashk_res.start + 1); | |
458 | #endif | |
1da177e4 LT |
459 | } |
460 | ||
461 | /* | |
462 | * The node 0 pgdat is initialized before all of these because | |
463 | * it's needed for bootmem. node>0 pgdats have their virtual | |
464 | * space allocated before the pagetables are in place to access | |
465 | * them, so they can't be cleared then. | |
466 | * | |
467 | * This should all compile down to nothing when NUMA is off. | |
468 | */ | |
10079ae3 | 469 | static void __init remapped_pgdat_init(void) |
1da177e4 LT |
470 | { |
471 | int nid; | |
472 | ||
473 | for_each_online_node(nid) { | |
474 | if (nid != 0) | |
475 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
476 | } | |
477 | } | |
478 | ||
1da177e4 LT |
479 | #ifdef CONFIG_MCA |
480 | static void set_mca_bus(int x) | |
481 | { | |
482 | MCA_bus = x; | |
483 | } | |
484 | #else | |
485 | static void set_mca_bus(int x) { } | |
486 | #endif | |
487 | ||
d3561b7f | 488 | /* Overridden in paravirt.c if CONFIG_PARAVIRT */ |
88d20328 | 489 | char * __init __attribute__((weak)) memory_setup(void) |
d3561b7f RR |
490 | { |
491 | return machine_specific_memory_setup(); | |
492 | } | |
493 | ||
1da177e4 LT |
494 | /* |
495 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
496 | * passed the efi memmap, systab, etc., so we should use these data structures | |
497 | * for initialization. Note, the efi init code path is determined by the | |
498 | * global efi_enabled. This allows the same kernel image to be used on existing | |
499 | * systems (with a traditional BIOS) as well as on EFI systems. | |
500 | */ | |
501 | void __init setup_arch(char **cmdline_p) | |
502 | { | |
503 | unsigned long max_low_pfn; | |
504 | ||
505 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); | |
506 | pre_setup_arch_hook(); | |
507 | early_cpu_init(); | |
508 | ||
509 | /* | |
510 | * FIXME: This isn't an official loader_type right | |
511 | * now but does currently work with elilo. | |
512 | * If we were configured as an EFI kernel, check to make | |
513 | * sure that we were loaded correctly from elilo and that | |
514 | * the system table is valid. If not, then initialize normally. | |
515 | */ | |
516 | #ifdef CONFIG_EFI | |
517 | if ((LOADER_TYPE == 0x50) && EFI_SYSTAB) | |
518 | efi_enabled = 1; | |
519 | #endif | |
520 | ||
521 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); | |
1da177e4 LT |
522 | screen_info = SCREEN_INFO; |
523 | edid_info = EDID_INFO; | |
524 | apm_info.bios = APM_BIOS_INFO; | |
525 | ist_info = IST_INFO; | |
526 | saved_videomode = VIDEO_MODE; | |
527 | if( SYS_DESC_TABLE.length != 0 ) { | |
528 | set_mca_bus(SYS_DESC_TABLE.table[3] & 0x2); | |
529 | machine_id = SYS_DESC_TABLE.table[0]; | |
530 | machine_submodel_id = SYS_DESC_TABLE.table[1]; | |
531 | BIOS_revision = SYS_DESC_TABLE.table[2]; | |
532 | } | |
533 | bootloader_type = LOADER_TYPE; | |
534 | ||
535 | #ifdef CONFIG_BLK_DEV_RAM | |
536 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; | |
537 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); | |
538 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); | |
539 | #endif | |
540 | ARCH_SETUP | |
541 | if (efi_enabled) | |
542 | efi_init(); | |
543 | else { | |
544 | printk(KERN_INFO "BIOS-provided physical RAM map:\n"); | |
d3561b7f | 545 | print_memory_map(memory_setup()); |
1da177e4 LT |
546 | } |
547 | ||
548 | copy_edd(); | |
549 | ||
550 | if (!MOUNT_ROOT_RDONLY) | |
551 | root_mountflags &= ~MS_RDONLY; | |
552 | init_mm.start_code = (unsigned long) _text; | |
553 | init_mm.end_code = (unsigned long) _etext; | |
554 | init_mm.end_data = (unsigned long) _edata; | |
555 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; | |
556 | ||
557 | code_resource.start = virt_to_phys(_text); | |
558 | code_resource.end = virt_to_phys(_etext)-1; | |
559 | data_resource.start = virt_to_phys(_etext); | |
560 | data_resource.end = virt_to_phys(_edata)-1; | |
561 | ||
1a3f239d | 562 | parse_early_param(); |
1da177e4 | 563 | |
1a3f239d RR |
564 | if (user_defined_memmap) { |
565 | printk(KERN_INFO "user-defined physical RAM map:\n"); | |
566 | print_memory_map("user"); | |
99b7de33 | 567 | } |
1a3f239d | 568 | |
4e498b66 | 569 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
1a3f239d | 570 | *cmdline_p = command_line; |
99b7de33 | 571 | |
1da177e4 LT |
572 | max_low_pfn = setup_memory(); |
573 | ||
7ce0bcfd ZA |
574 | #ifdef CONFIG_VMI |
575 | /* | |
576 | * Must be after max_low_pfn is determined, and before kernel | |
577 | * pagetables are setup. | |
578 | */ | |
579 | vmi_init(); | |
580 | #endif | |
581 | ||
1da177e4 LT |
582 | /* |
583 | * NOTE: before this point _nobody_ is allowed to allocate | |
584 | * any memory using the bootmem allocator. Although the | |
585 | * alloctor is now initialised only the first 8Mb of the kernel | |
586 | * virtual address space has been mapped. All allocations before | |
587 | * paging_init() has completed must use the alloc_bootmem_low_pages() | |
588 | * variant (which allocates DMA'able memory) and care must be taken | |
589 | * not to exceed the 8Mb limit. | |
590 | */ | |
591 | ||
592 | #ifdef CONFIG_SMP | |
593 | smp_alloc_memory(); /* AP processor realmode stacks in low memory*/ | |
594 | #endif | |
595 | paging_init(); | |
596 | remapped_pgdat_init(); | |
05b79bdc | 597 | sparse_init(); |
1da177e4 LT |
598 | zone_sizes_init(); |
599 | ||
600 | /* | |
601 | * NOTE: at this point the bootmem allocator is fully available. | |
602 | */ | |
603 | ||
6996d3b6 JF |
604 | paravirt_post_allocator_init(); |
605 | ||
1da177e4 LT |
606 | dmi_scan_machine(); |
607 | ||
608 | #ifdef CONFIG_X86_GENERICARCH | |
1a3f239d | 609 | generic_apic_probe(); |
1da177e4 LT |
610 | #endif |
611 | if (efi_enabled) | |
612 | efi_map_memmap(); | |
613 | ||
888ba6c6 | 614 | #ifdef CONFIG_ACPI |
1da177e4 LT |
615 | /* |
616 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
617 | */ | |
618 | acpi_boot_table_init(); | |
d44647b0 AC |
619 | #endif |
620 | ||
f157cbb1 | 621 | #ifdef CONFIG_PCI |
d44647b0 AC |
622 | #ifdef CONFIG_X86_IO_APIC |
623 | check_acpi_pci(); /* Checks more than just ACPI actually */ | |
624 | #endif | |
f157cbb1 | 625 | #endif |
d44647b0 AC |
626 | |
627 | #ifdef CONFIG_ACPI | |
1da177e4 LT |
628 | acpi_boot_init(); |
629 | ||
911a62d4 VP |
630 | #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) |
631 | if (def_to_bigsmp) | |
632 | printk(KERN_WARNING "More than 8 CPUs detected and " | |
633 | "CONFIG_X86_PC cannot handle it.\nUse " | |
634 | "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); | |
635 | #endif | |
636 | #endif | |
1da177e4 LT |
637 | #ifdef CONFIG_X86_LOCAL_APIC |
638 | if (smp_found_config) | |
639 | get_smp_config(); | |
640 | #endif | |
641 | ||
5c95da9f | 642 | e820_register_memory(); |
1da177e4 LT |
643 | |
644 | #ifdef CONFIG_VT | |
645 | #if defined(CONFIG_VGA_CONSOLE) | |
646 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
647 | conswitchp = &vga_con; | |
648 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
649 | conswitchp = &dummy_con; | |
650 | #endif | |
651 | #endif | |
652 | } |