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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> | |
138fe4e0 | 42 | #include <linux/iscsi_ibft.h> |
1da177e4 | 43 | #include <linux/nodemask.h> |
1bc3b91a | 44 | #include <linux/kexec.h> |
e9928674 | 45 | #include <linux/dmi.h> |
22a9835c | 46 | #include <linux/pfn.h> |
376ff035 | 47 | #include <linux/pci.h> |
f212ec4b | 48 | #include <linux/init_ohci1394_dma.h> |
790c73f6 | 49 | #include <linux/kvm_para.h> |
1bc3b91a | 50 | |
1da177e4 | 51 | #include <video/edid.h> |
1bc3b91a | 52 | |
093af8d7 | 53 | #include <asm/mtrr.h> |
9635b47d | 54 | #include <asm/apic.h> |
1da177e4 LT |
55 | #include <asm/e820.h> |
56 | #include <asm/mpspec.h> | |
91023300 | 57 | #include <asm/mmzone.h> |
1da177e4 LT |
58 | #include <asm/setup.h> |
59 | #include <asm/arch_hooks.h> | |
60 | #include <asm/sections.h> | |
1c6e5503 | 61 | #include <asm/dmi.h> |
1da177e4 LT |
62 | #include <asm/io_apic.h> |
63 | #include <asm/ist.h> | |
64 | #include <asm/io.h> | |
7ce0bcfd | 65 | #include <asm/vmi.h> |
e75eac33 | 66 | #include <setup_arch.h> |
ce3fe6b2 | 67 | #include <asm/bios_ebda.h> |
00bf4098 | 68 | #include <asm/cacheflush.h> |
2fde61fd | 69 | #include <asm/processor.h> |
ecacf09f | 70 | #include <asm/efi.h> |
cc9f7a0c | 71 | #include <asm/bugs.h> |
1da177e4 LT |
72 | |
73 | /* This value is set up by the early boot code to point to the value | |
74 | immediately after the boot time page tables. It contains a *physical* | |
75 | address, and must not be in the .bss segment! */ | |
f0d43100 | 76 | unsigned long init_pg_tables_start __initdata = ~0UL; |
1da177e4 LT |
77 | unsigned long init_pg_tables_end __initdata = ~0UL; |
78 | ||
1da177e4 LT |
79 | /* |
80 | * Machine setup.. | |
81 | */ | |
c9cce83d BW |
82 | static struct resource data_resource = { |
83 | .name = "Kernel data", | |
84 | .start = 0, | |
85 | .end = 0, | |
86 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
87 | }; | |
88 | ||
89 | static struct resource code_resource = { | |
90 | .name = "Kernel code", | |
91 | .start = 0, | |
92 | .end = 0, | |
93 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
94 | }; | |
95 | ||
96 | static struct resource bss_resource = { | |
97 | .name = "Kernel bss", | |
98 | .start = 0, | |
99 | .end = 0, | |
100 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
101 | }; | |
102 | ||
103 | static struct resource video_ram_resource = { | |
104 | .name = "Video RAM area", | |
105 | .start = 0xa0000, | |
106 | .end = 0xbffff, | |
107 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
108 | }; | |
109 | ||
1da177e4 | 110 | /* cpu data as detected by the assembly code in head.S */ |
4a5d107a | 111 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
1da177e4 | 112 | /* common cpu data for all cpus */ |
c3d8c141 | 113 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
129f6946 | 114 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 | 115 | |
0c254e38 AS |
116 | unsigned int def_to_bigsmp; |
117 | ||
551889a6 | 118 | #ifndef CONFIG_X86_PAE |
1da177e4 | 119 | unsigned long mmu_cr4_features; |
551889a6 IC |
120 | #else |
121 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
122 | #endif | |
1da177e4 | 123 | |
1da177e4 LT |
124 | /* for MCA, but anyone else can use it if they want */ |
125 | unsigned int machine_id; | |
126 | unsigned int machine_submodel_id; | |
127 | unsigned int BIOS_revision; | |
1da177e4 | 128 | |
1da177e4 LT |
129 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
130 | int bootloader_type; | |
131 | ||
1c6e5503 YL |
132 | /* |
133 | * Early DMI memory | |
134 | */ | |
135 | int dmi_alloc_index; | |
136 | char dmi_alloc_data[DMI_MAX_DATA]; | |
137 | ||
1da177e4 LT |
138 | /* |
139 | * Setup options | |
140 | */ | |
1da177e4 | 141 | struct screen_info screen_info; |
129f6946 | 142 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 143 | struct apm_info apm_info; |
129f6946 | 144 | EXPORT_SYMBOL(apm_info); |
1da177e4 | 145 | struct edid_info edid_info; |
5e518d76 | 146 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 147 | struct ist_info ist_info; |
129f6946 AD |
148 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
149 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
150 | EXPORT_SYMBOL(ist_info); | |
151 | #endif | |
1da177e4 | 152 | |
1da177e4 LT |
153 | extern int root_mountflags; |
154 | ||
e44b7b75 | 155 | unsigned long saved_video_mode; |
1da177e4 | 156 | |
cf8fa920 | 157 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 158 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 159 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 160 | |
4e498b66 | 161 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 | 162 | |
1da177e4 LT |
163 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
164 | struct edd edd; | |
165 | #ifdef CONFIG_EDD_MODULE | |
166 | EXPORT_SYMBOL(edd); | |
167 | #endif | |
168 | /** | |
169 | * copy_edd() - Copy the BIOS EDD information | |
170 | * from boot_params into a safe place. | |
171 | * | |
172 | */ | |
173 | static inline void copy_edd(void) | |
174 | { | |
30c82645 PA |
175 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
176 | sizeof(edd.mbr_signature)); | |
177 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
178 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
179 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
180 | } |
181 | #else | |
182 | static inline void copy_edd(void) | |
183 | { | |
184 | } | |
185 | #endif | |
186 | ||
cf8fa920 PA |
187 | #ifdef CONFIG_BLK_DEV_INITRD |
188 | ||
189 | static bool do_relocate_initrd = false; | |
190 | ||
2ec65f8b | 191 | static void __init reserve_initrd(void) |
cf8fa920 | 192 | { |
ba5b14cc YL |
193 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
194 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
195 | u64 ramdisk_end = ramdisk_image + ramdisk_size; | |
196 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
197 | u64 ramdisk_here; | |
2ec65f8b | 198 | u64 ramdisk_target; |
cf8fa920 | 199 | |
cf8fa920 PA |
200 | if (!boot_params.hdr.type_of_loader || |
201 | !ramdisk_image || !ramdisk_size) | |
202 | return; /* No initrd provided by bootloader */ | |
203 | ||
a4c81cf6 YL |
204 | initrd_start = 0; |
205 | ||
2ec65f8b | 206 | if (ramdisk_size >= (end_of_lowmem>>1)) { |
3945e2c9 | 207 | free_early(ramdisk_image, ramdisk_end); |
cf8fa920 PA |
208 | printk(KERN_ERR "initrd too large to handle, " |
209 | "disabling initrd\n"); | |
210 | return; | |
211 | } | |
a4c81cf6 | 212 | |
f0d43100 YL |
213 | printk(KERN_INFO "old RAMDISK: %08llx - %08llx\n", ramdisk_image, |
214 | ramdisk_end); | |
215 | ||
216 | ||
cf8fa920 PA |
217 | if (ramdisk_end <= end_of_lowmem) { |
218 | /* All in lowmem, easy case */ | |
a4c81cf6 YL |
219 | /* |
220 | * don't need to reserve again, already reserved early | |
ba5b14cc | 221 | * in i386_start_kernel |
a4c81cf6 | 222 | */ |
cf8fa920 | 223 | initrd_start = ramdisk_image + PAGE_OFFSET; |
225c37d7 | 224 | initrd_end = initrd_start + ramdisk_size; |
cf8fa920 PA |
225 | return; |
226 | } | |
227 | ||
228 | /* We need to move the initrd down into lowmem */ | |
2ec65f8b YL |
229 | ramdisk_target = max_pfn_mapped<<PAGE_SHIFT; |
230 | ramdisk_here = find_e820_area(min(ramdisk_target, end_of_lowmem>>1), | |
ba5b14cc YL |
231 | end_of_lowmem, ramdisk_size, |
232 | PAGE_SIZE); | |
cf8fa920 | 233 | |
3945e2c9 YL |
234 | if (ramdisk_here == -1ULL) |
235 | panic("Cannot find place for new RAMDISK of size %lld\n", | |
236 | ramdisk_size); | |
237 | ||
cf8fa920 PA |
238 | /* Note: this includes all the lowmem currently occupied by |
239 | the initrd, we rely on that fact to keep the data intact. */ | |
3945e2c9 | 240 | reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, |
ba5b14cc | 241 | "NEW RAMDISK"); |
cf8fa920 PA |
242 | initrd_start = ramdisk_here + PAGE_OFFSET; |
243 | initrd_end = initrd_start + ramdisk_size; | |
f0d43100 YL |
244 | printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", |
245 | ramdisk_here, ramdisk_here + ramdisk_size); | |
cf8fa920 PA |
246 | |
247 | do_relocate_initrd = true; | |
248 | } | |
249 | ||
250 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) | |
251 | ||
11cd0bc1 | 252 | void __init post_reserve_initrd(void) |
cf8fa920 | 253 | { |
ba5b14cc YL |
254 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
255 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
256 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
257 | u64 ramdisk_here; | |
cf8fa920 PA |
258 | unsigned long slop, clen, mapaddr; |
259 | char *p, *q; | |
260 | ||
261 | if (!do_relocate_initrd) | |
262 | return; | |
263 | ||
264 | ramdisk_here = initrd_start - PAGE_OFFSET; | |
265 | ||
266 | q = (char *)initrd_start; | |
267 | ||
268 | /* Copy any lowmem portion of the initrd */ | |
269 | if (ramdisk_image < end_of_lowmem) { | |
270 | clen = end_of_lowmem - ramdisk_image; | |
271 | p = (char *)__va(ramdisk_image); | |
272 | memcpy(q, p, clen); | |
273 | q += clen; | |
a4c81cf6 | 274 | /* need to free these low pages...*/ |
ba5b14cc YL |
275 | printk(KERN_INFO "Freeing old partial RAMDISK %08llx-%08llx\n", |
276 | ramdisk_image, ramdisk_image + clen - 1); | |
a4c81cf6 | 277 | free_bootmem(ramdisk_image, clen); |
cf8fa920 PA |
278 | ramdisk_image += clen; |
279 | ramdisk_size -= clen; | |
280 | } | |
281 | ||
282 | /* Copy the highmem portion of the initrd */ | |
283 | while (ramdisk_size) { | |
284 | slop = ramdisk_image & ~PAGE_MASK; | |
285 | clen = ramdisk_size; | |
286 | if (clen > MAX_MAP_CHUNK-slop) | |
287 | clen = MAX_MAP_CHUNK-slop; | |
288 | mapaddr = ramdisk_image & PAGE_MASK; | |
beacfaac | 289 | p = early_ioremap(mapaddr, clen+slop); |
cf8fa920 | 290 | memcpy(q, p+slop, clen); |
beacfaac | 291 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
292 | q += clen; |
293 | ramdisk_image += clen; | |
294 | ramdisk_size -= clen; | |
295 | } | |
a4c81cf6 | 296 | /* high pages is not converted by early_res_to_bootmem */ |
ba5b14cc YL |
297 | ramdisk_image = boot_params.hdr.ramdisk_image; |
298 | ramdisk_size = boot_params.hdr.ramdisk_size; | |
299 | printk(KERN_INFO "Copied RAMDISK from %016llx - %016llx to %08llx - %08llx\n", | |
300 | ramdisk_image, ramdisk_image + ramdisk_size - 1, | |
301 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
9a27f5c5 YL |
302 | |
303 | /* need to free that, otherwise init highmem will reserve it again */ | |
304 | free_early(ramdisk_image, ramdisk_image+ramdisk_size); | |
cf8fa920 | 305 | } |
225c37d7 YL |
306 | #else |
307 | void __init reserve_initrd(void) | |
308 | { | |
309 | } | |
11cd0bc1 | 310 | void __init post_reserve_initrd(void) |
225c37d7 YL |
311 | { |
312 | } | |
cf8fa920 PA |
313 | #endif /* CONFIG_BLK_DEV_INITRD */ |
314 | ||
1da177e4 LT |
315 | #ifdef CONFIG_MCA |
316 | static void set_mca_bus(int x) | |
317 | { | |
318 | MCA_bus = x; | |
319 | } | |
320 | #else | |
321 | static void set_mca_bus(int x) { } | |
322 | #endif | |
323 | ||
324 | /* | |
325 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
326 | * passed the efi memmap, systab, etc., so we should use these data structures | |
327 | * for initialization. Note, the efi init code path is determined by the | |
328 | * global efi_enabled. This allows the same kernel image to be used on existing | |
329 | * systems (with a traditional BIOS) as well as on EFI systems. | |
330 | */ | |
331 | void __init setup_arch(char **cmdline_p) | |
332 | { | |
1da177e4 LT |
333 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
334 | pre_setup_arch_hook(); | |
335 | early_cpu_init(); | |
beacfaac | 336 | early_ioremap_init(); |
c45a707d | 337 | reserve_setup_data(); |
1da177e4 | 338 | |
30c82645 PA |
339 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
340 | screen_info = boot_params.screen_info; | |
341 | edid_info = boot_params.edid_info; | |
342 | apm_info.bios = boot_params.apm_bios_info; | |
343 | ist_info = boot_params.ist_info; | |
e44b7b75 | 344 | saved_video_mode = boot_params.hdr.vid_mode; |
30c82645 PA |
345 | if( boot_params.sys_desc_table.length != 0 ) { |
346 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); | |
347 | machine_id = boot_params.sys_desc_table.table[0]; | |
348 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
349 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 350 | } |
30c82645 | 351 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
352 | |
353 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
354 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
355 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
356 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 357 | #endif |
7465252e YL |
358 | #ifdef CONFIG_EFI |
359 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
360 | "EL32", 4)) { | |
361 | efi_enabled = 1; | |
362 | efi_reserve_early(); | |
363 | } | |
364 | #endif | |
365 | ||
1da177e4 | 366 | ARCH_SETUP |
2215e69d | 367 | |
0dbfafa5 | 368 | setup_memory_map(); |
1da177e4 LT |
369 | copy_edd(); |
370 | ||
30c82645 | 371 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
372 | root_mountflags &= ~MS_RDONLY; |
373 | init_mm.start_code = (unsigned long) _text; | |
374 | init_mm.end_code = (unsigned long) _etext; | |
375 | init_mm.end_data = (unsigned long) _edata; | |
376 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; | |
377 | ||
378 | code_resource.start = virt_to_phys(_text); | |
379 | code_resource.end = virt_to_phys(_etext)-1; | |
380 | data_resource.start = virt_to_phys(_etext); | |
381 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
382 | bss_resource.start = virt_to_phys(&__bss_start); |
383 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 384 | |
9a2e5930 YL |
385 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
386 | *cmdline_p = command_line; | |
387 | ||
c45a707d HY |
388 | parse_setup_data(); |
389 | ||
1a3f239d | 390 | parse_early_param(); |
1da177e4 | 391 | |
3c999f14 | 392 | if (acpi_mps_check()){ |
3eb11edc | 393 | #ifdef CONFIG_X86_LOCAL_APIC |
3c999f14 | 394 | enable_local_apic = -1; |
3eb11edc | 395 | #endif |
3c999f14 YL |
396 | clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); |
397 | } | |
398 | ||
0dbfafa5 | 399 | finish_e820_parsing(); |
1a3f239d | 400 | |
41c094fd YL |
401 | probe_roms(); |
402 | ||
403 | /* after parse_early_param, so could debug it */ | |
404 | insert_resource(&iomem_resource, &code_resource); | |
405 | insert_resource(&iomem_resource, &data_resource); | |
406 | insert_resource(&iomem_resource, &bss_resource); | |
407 | ||
8b2cb7a8 HY |
408 | if (efi_enabled) |
409 | efi_init(); | |
410 | ||
cc9f7a0c YL |
411 | if (ppro_with_ram_bug()) { |
412 | e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, | |
413 | E820_RESERVED); | |
414 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
415 | printk(KERN_INFO "fixed physical RAM map:\n"); | |
416 | e820_print_map("bad_ppro"); | |
417 | } | |
418 | ||
7b2a0a6c YL |
419 | e820_register_active_regions(0, 0, -1UL); |
420 | /* | |
421 | * partially used pages are not usable - thus | |
422 | * we are rounding upwards: | |
423 | */ | |
424 | max_pfn = e820_end_of_ram(); | |
425 | ||
6780711e YL |
426 | /* preallocate 4k for mptable mpc */ |
427 | early_reserve_e820_mpc_new(); | |
093af8d7 YL |
428 | /* update e820 for memory not covered by WB MTRRs */ |
429 | mtrr_bp_init(); | |
7b2a0a6c YL |
430 | if (mtrr_trim_uncached_memory(max_pfn)) { |
431 | remove_all_active_ranges(); | |
432 | e820_register_active_regions(0, 0, -1UL); | |
433 | max_pfn = e820_end_of_ram(); | |
434 | } | |
76c32418 | 435 | |
2ec65f8b YL |
436 | find_low_pfn_range(); |
437 | ||
438 | reserve_initrd(); | |
439 | ||
1c6e5503 YL |
440 | dmi_scan_machine(); |
441 | ||
442 | io_delay_init(); | |
443 | ||
1c6e5503 YL |
444 | /* |
445 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
446 | */ | |
447 | acpi_boot_table_init(); | |
1c6e5503 YL |
448 | |
449 | #ifdef CONFIG_ACPI_NUMA | |
450 | /* | |
451 | * Parse SRAT to discover nodes. | |
452 | */ | |
453 | acpi_numa_init(); | |
454 | #endif | |
455 | ||
2ec65f8b | 456 | initmem_init(0, max_pfn); |
093af8d7 | 457 | |
593a0cc3 YL |
458 | #ifdef CONFIG_ACPI_SLEEP |
459 | /* | |
460 | * Reserve low memory region for sleep support. | |
461 | */ | |
462 | acpi_reserve_bootmem(); | |
463 | #endif | |
464 | #ifdef CONFIG_X86_FIND_SMP_CONFIG | |
465 | /* | |
466 | * Find and reserve possible boot-time SMP configuration: | |
467 | */ | |
468 | find_smp_config(); | |
469 | #endif | |
470 | reserve_crashkernel(); | |
471 | ||
472 | reserve_ibft_region(); | |
473 | ||
790c73f6 GOC |
474 | #ifdef CONFIG_KVM_CLOCK |
475 | kvmclock_init(); | |
476 | #endif | |
477 | ||
7ce0bcfd ZA |
478 | #ifdef CONFIG_VMI |
479 | /* | |
480 | * Must be after max_low_pfn is determined, and before kernel | |
481 | * pagetables are setup. | |
482 | */ | |
483 | vmi_init(); | |
484 | #endif | |
1da177e4 LT |
485 | /* |
486 | * NOTE: before this point _nobody_ is allowed to allocate | |
487 | * any memory using the bootmem allocator. Although the | |
27b46d76 | 488 | * allocator is now initialised only the first 8Mb of the kernel |
1da177e4 LT |
489 | * virtual address space has been mapped. All allocations before |
490 | * paging_init() has completed must use the alloc_bootmem_low_pages() | |
491 | * variant (which allocates DMA'able memory) and care must be taken | |
492 | * not to exceed the 8Mb limit. | |
493 | */ | |
494 | ||
1da177e4 | 495 | paging_init(); |
f212ec4b BK |
496 | |
497 | /* | |
498 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
499 | */ | |
500 | ||
501 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
502 | if (init_ohci1394_dma_early) | |
503 | init_ohci1394_dma_on_all_controllers(); | |
504 | #endif | |
505 | ||
1da177e4 | 506 | #ifdef CONFIG_X86_GENERICARCH |
1a3f239d | 507 | generic_apic_probe(); |
cf8fa920 | 508 | #endif |
1da177e4 | 509 | |
54ef3400 | 510 | early_quirks(); |
d44647b0 | 511 | |
295deae4 YL |
512 | /* |
513 | * Read APIC and some other early information from ACPI tables. | |
514 | */ | |
1da177e4 | 515 | acpi_boot_init(); |
04606618 | 516 | |
e0da3364 | 517 | #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS) |
295deae4 YL |
518 | /* |
519 | * get boot-time SMP configuration: | |
520 | */ | |
e0da3364 YL |
521 | if (smp_found_config) |
522 | get_smp_config(); | |
523 | #endif | |
911a62d4 VP |
524 | #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) |
525 | if (def_to_bigsmp) | |
526 | printk(KERN_WARNING "More than 8 CPUs detected and " | |
527 | "CONFIG_X86_PC cannot handle it.\nUse " | |
528 | "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); | |
529 | #endif | |
295deae4 | 530 | kvm_guest_init(); |
1da177e4 | 531 | |
41c094fd | 532 | e820_reserve_resources(); |
bf62f398 | 533 | e820_mark_nosave_regions(max_low_pfn); |
1da177e4 | 534 | |
41c094fd | 535 | request_resource(&iomem_resource, &video_ram_resource); |
ce97c40e | 536 | reserve_standard_io_resources(); |
41c094fd YL |
537 | |
538 | e820_setup_gap(); | |
539 | ||
1da177e4 LT |
540 | #ifdef CONFIG_VT |
541 | #if defined(CONFIG_VGA_CONSOLE) | |
542 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
543 | conswitchp = &vga_con; | |
544 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
545 | conswitchp = &dummy_con; | |
546 | #endif | |
547 | #endif | |
548 | } | |
c9cce83d | 549 |