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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> |
46d671b5 | 48 | #include <asm/pci-direct.h> |
f212ec4b | 49 | #include <linux/init_ohci1394_dma.h> |
790c73f6 | 50 | #include <linux/kvm_para.h> |
1bc3b91a | 51 | |
46d671b5 YL |
52 | #include <linux/errno.h> |
53 | #include <linux/kernel.h> | |
54 | #include <linux/stddef.h> | |
55 | #include <linux/unistd.h> | |
56 | #include <linux/ptrace.h> | |
57 | #include <linux/slab.h> | |
58 | #include <linux/user.h> | |
59 | #include <linux/delay.h> | |
46d671b5 YL |
60 | |
61 | #include <linux/kallsyms.h> | |
46d671b5 YL |
62 | #include <linux/cpufreq.h> |
63 | #include <linux/dma-mapping.h> | |
64 | #include <linux/ctype.h> | |
65 | #include <linux/uaccess.h> | |
66 | ||
67 | #include <linux/percpu.h> | |
68 | #include <linux/crash_dump.h> | |
69 | ||
1da177e4 | 70 | #include <video/edid.h> |
1bc3b91a | 71 | |
093af8d7 | 72 | #include <asm/mtrr.h> |
9635b47d | 73 | #include <asm/apic.h> |
1da177e4 LT |
74 | #include <asm/e820.h> |
75 | #include <asm/mpspec.h> | |
76 | #include <asm/setup.h> | |
55f26239 | 77 | #include <asm/efi.h> |
8e6dafd6 IM |
78 | #include <asm/timer.h> |
79 | #include <asm/i8259.h> | |
1da177e4 | 80 | #include <asm/sections.h> |
1c6e5503 | 81 | #include <asm/dmi.h> |
1da177e4 LT |
82 | #include <asm/io_apic.h> |
83 | #include <asm/ist.h> | |
7ce0bcfd | 84 | #include <asm/vmi.h> |
1164dd00 | 85 | #include <asm/setup_arch.h> |
ce3fe6b2 | 86 | #include <asm/bios_ebda.h> |
00bf4098 | 87 | #include <asm/cacheflush.h> |
2fde61fd | 88 | #include <asm/processor.h> |
cc9f7a0c | 89 | #include <asm/bugs.h> |
1da177e4 | 90 | |
46d671b5 YL |
91 | #include <asm/system.h> |
92 | #include <asm/vsyscall.h> | |
6e5385d4 | 93 | #include <asm/cpu.h> |
46d671b5 YL |
94 | #include <asm/desc.h> |
95 | #include <asm/dma.h> | |
46a7fa27 | 96 | #include <asm/iommu.h> |
1d9b16d1 | 97 | #include <asm/gart.h> |
46d671b5 YL |
98 | #include <asm/mmu_context.h> |
99 | #include <asm/proto.h> | |
100 | ||
46d671b5 | 101 | #include <asm/paravirt.h> |
88b094fb | 102 | #include <asm/hypervisor.h> |
46d671b5 YL |
103 | |
104 | #include <asm/percpu.h> | |
46d671b5 YL |
105 | #include <asm/topology.h> |
106 | #include <asm/apicdef.h> | |
55f26239 YL |
107 | #ifdef CONFIG_X86_64 |
108 | #include <asm/numa_64.h> | |
109 | #endif | |
46d671b5 | 110 | |
2b72394e PE |
111 | /* |
112 | * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries. | |
113 | * The direct mapping extends to max_pfn_mapped, so that we can directly access | |
114 | * apertures, ACPI and other tables without having to play with fixmaps. | |
115 | */ | |
116 | unsigned long max_low_pfn_mapped; | |
117 | unsigned long max_pfn_mapped; | |
118 | ||
796216a5 JF |
119 | RESERVE_BRK(dmi_alloc, 65536); |
120 | ||
c0b5842a IM |
121 | unsigned int boot_cpu_id __read_mostly; |
122 | ||
93dbda7c JF |
123 | static __initdata unsigned long _brk_start = (unsigned long)__brk_base; |
124 | unsigned long _brk_end = (unsigned long)__brk_base; | |
125 | ||
c0b5842a IM |
126 | #ifdef CONFIG_X86_64 |
127 | int default_cpu_present_to_apicid(int mps_cpu) | |
128 | { | |
129 | return __default_cpu_present_to_apicid(mps_cpu); | |
130 | } | |
131 | ||
132 | int default_check_phys_apicid_present(int boot_cpu_physical_apicid) | |
133 | { | |
134 | return __default_check_phys_apicid_present(boot_cpu_physical_apicid); | |
135 | } | |
136 | #endif | |
137 | ||
217b8ce8 YL |
138 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
139 | struct boot_params __initdata boot_params; | |
140 | #else | |
141 | struct boot_params boot_params; | |
142 | #endif | |
143 | ||
1da177e4 LT |
144 | /* |
145 | * Machine setup.. | |
146 | */ | |
c9cce83d BW |
147 | static struct resource data_resource = { |
148 | .name = "Kernel data", | |
149 | .start = 0, | |
150 | .end = 0, | |
151 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
152 | }; | |
153 | ||
154 | static struct resource code_resource = { | |
155 | .name = "Kernel code", | |
156 | .start = 0, | |
157 | .end = 0, | |
158 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
159 | }; | |
160 | ||
161 | static struct resource bss_resource = { | |
162 | .name = "Kernel bss", | |
163 | .start = 0, | |
164 | .end = 0, | |
165 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
166 | }; | |
167 | ||
7dea23ec YL |
168 | |
169 | #ifdef CONFIG_X86_32 | |
1da177e4 | 170 | /* cpu data as detected by the assembly code in head.S */ |
7dea23ec | 171 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
1da177e4 | 172 | /* common cpu data for all cpus */ |
7dea23ec | 173 | struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
129f6946 | 174 | EXPORT_SYMBOL(boot_cpu_data); |
7dea23ec YL |
175 | static void set_mca_bus(int x) |
176 | { | |
177 | #ifdef CONFIG_MCA | |
178 | MCA_bus = x; | |
179 | #endif | |
180 | } | |
1da177e4 | 181 | |
0c254e38 AS |
182 | unsigned int def_to_bigsmp; |
183 | ||
1da177e4 LT |
184 | /* for MCA, but anyone else can use it if they want */ |
185 | unsigned int machine_id; | |
186 | unsigned int machine_submodel_id; | |
187 | unsigned int BIOS_revision; | |
1da177e4 | 188 | |
7dea23ec YL |
189 | struct apm_info apm_info; |
190 | EXPORT_SYMBOL(apm_info); | |
191 | ||
192 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ | |
193 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
194 | struct ist_info ist_info; | |
195 | EXPORT_SYMBOL(ist_info); | |
196 | #else | |
197 | struct ist_info ist_info; | |
198 | #endif | |
199 | ||
200 | #else | |
ed26dbe5 JF |
201 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { |
202 | .x86_phys_bits = MAX_PHYSMEM_BITS, | |
203 | }; | |
7dea23ec YL |
204 | EXPORT_SYMBOL(boot_cpu_data); |
205 | #endif | |
206 | ||
207 | ||
208 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) | |
209 | unsigned long mmu_cr4_features; | |
210 | #else | |
211 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
212 | #endif | |
213 | ||
5031296c PA |
214 | /* Boot loader ID and version as integers, for the benefit of proc_dointvec */ |
215 | int bootloader_type, bootloader_version; | |
1da177e4 | 216 | |
1da177e4 LT |
217 | /* |
218 | * Setup options | |
219 | */ | |
1da177e4 | 220 | struct screen_info screen_info; |
129f6946 | 221 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 222 | struct edid_info edid_info; |
5e518d76 | 223 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 224 | |
1da177e4 LT |
225 | extern int root_mountflags; |
226 | ||
e44b7b75 | 227 | unsigned long saved_video_mode; |
1da177e4 | 228 | |
cf8fa920 | 229 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 230 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 231 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 232 | |
4e498b66 | 233 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
516cbf37 TB |
234 | #ifdef CONFIG_CMDLINE_BOOL |
235 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
236 | #endif | |
1da177e4 | 237 | |
1da177e4 LT |
238 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
239 | struct edd edd; | |
240 | #ifdef CONFIG_EDD_MODULE | |
241 | EXPORT_SYMBOL(edd); | |
242 | #endif | |
243 | /** | |
244 | * copy_edd() - Copy the BIOS EDD information | |
245 | * from boot_params into a safe place. | |
246 | * | |
247 | */ | |
248 | static inline void copy_edd(void) | |
249 | { | |
30c82645 PA |
250 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
251 | sizeof(edd.mbr_signature)); | |
252 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
253 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
254 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
255 | } |
256 | #else | |
257 | static inline void copy_edd(void) | |
258 | { | |
259 | } | |
260 | #endif | |
261 | ||
5368a2be PA |
262 | void * __init extend_brk(size_t size, size_t align) |
263 | { | |
264 | size_t mask = align - 1; | |
265 | void *ret; | |
266 | ||
267 | BUG_ON(_brk_start == 0); | |
268 | BUG_ON(align & mask); | |
269 | ||
270 | _brk_end = (_brk_end + mask) & ~mask; | |
271 | BUG_ON((char *)(_brk_end + size) > __brk_limit); | |
272 | ||
273 | ret = (void *)_brk_end; | |
274 | _brk_end += size; | |
275 | ||
276 | memset(ret, 0, size); | |
277 | ||
278 | return ret; | |
279 | } | |
280 | ||
854c879f PE |
281 | #ifdef CONFIG_X86_64 |
282 | static void __init init_gbpages(void) | |
283 | { | |
284 | if (direct_gbpages && cpu_has_gbpages) | |
285 | printk(KERN_INFO "Using GB pages for direct mapping\n"); | |
286 | else | |
287 | direct_gbpages = 0; | |
288 | } | |
289 | #else | |
290 | static inline void init_gbpages(void) | |
291 | { | |
292 | } | |
293 | #endif | |
294 | ||
5368a2be PA |
295 | static void __init reserve_brk(void) |
296 | { | |
297 | if (_brk_end > _brk_start) | |
298 | reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK"); | |
299 | ||
300 | /* Mark brk area as locked down and no longer taking any | |
301 | new allocations */ | |
302 | _brk_start = 0; | |
303 | } | |
304 | ||
cf8fa920 PA |
305 | #ifdef CONFIG_BLK_DEV_INITRD |
306 | ||
eb1379cb YL |
307 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) |
308 | static void __init relocate_initrd(void) | |
cf8fa920 | 309 | { |
eb1379cb | 310 | |
ba5b14cc YL |
311 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
312 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
8c5dd8f4 | 313 | u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; |
ba5b14cc | 314 | u64 ramdisk_here; |
eb1379cb YL |
315 | unsigned long slop, clen, mapaddr; |
316 | char *p, *q; | |
cf8fa920 PA |
317 | |
318 | /* We need to move the initrd down into lowmem */ | |
4e29684c YL |
319 | ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, |
320 | PAGE_SIZE); | |
cf8fa920 | 321 | |
3945e2c9 YL |
322 | if (ramdisk_here == -1ULL) |
323 | panic("Cannot find place for new RAMDISK of size %lld\n", | |
324 | ramdisk_size); | |
325 | ||
cf8fa920 PA |
326 | /* Note: this includes all the lowmem currently occupied by |
327 | the initrd, we rely on that fact to keep the data intact. */ | |
3945e2c9 | 328 | reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, |
ba5b14cc | 329 | "NEW RAMDISK"); |
cf8fa920 PA |
330 | initrd_start = ramdisk_here + PAGE_OFFSET; |
331 | initrd_end = initrd_start + ramdisk_size; | |
f0d43100 YL |
332 | printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", |
333 | ramdisk_here, ramdisk_here + ramdisk_size); | |
cf8fa920 | 334 | |
cf8fa920 PA |
335 | q = (char *)initrd_start; |
336 | ||
337 | /* Copy any lowmem portion of the initrd */ | |
338 | if (ramdisk_image < end_of_lowmem) { | |
339 | clen = end_of_lowmem - ramdisk_image; | |
340 | p = (char *)__va(ramdisk_image); | |
341 | memcpy(q, p, clen); | |
342 | q += clen; | |
343 | ramdisk_image += clen; | |
344 | ramdisk_size -= clen; | |
345 | } | |
346 | ||
347 | /* Copy the highmem portion of the initrd */ | |
348 | while (ramdisk_size) { | |
349 | slop = ramdisk_image & ~PAGE_MASK; | |
350 | clen = ramdisk_size; | |
351 | if (clen > MAX_MAP_CHUNK-slop) | |
352 | clen = MAX_MAP_CHUNK-slop; | |
353 | mapaddr = ramdisk_image & PAGE_MASK; | |
88b4c146 | 354 | p = early_memremap(mapaddr, clen+slop); |
cf8fa920 | 355 | memcpy(q, p+slop, clen); |
beacfaac | 356 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
357 | q += clen; |
358 | ramdisk_image += clen; | |
359 | ramdisk_size -= clen; | |
360 | } | |
a4c81cf6 | 361 | /* high pages is not converted by early_res_to_bootmem */ |
ba5b14cc YL |
362 | ramdisk_image = boot_params.hdr.ramdisk_image; |
363 | ramdisk_size = boot_params.hdr.ramdisk_size; | |
eb1379cb YL |
364 | printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" |
365 | " %08llx - %08llx\n", | |
ba5b14cc YL |
366 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
367 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
eb1379cb | 368 | } |
9a27f5c5 | 369 | |
eb1379cb YL |
370 | static void __init reserve_initrd(void) |
371 | { | |
372 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; | |
373 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
374 | u64 ramdisk_end = ramdisk_image + ramdisk_size; | |
8c5dd8f4 | 375 | u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; |
eb1379cb YL |
376 | |
377 | if (!boot_params.hdr.type_of_loader || | |
378 | !ramdisk_image || !ramdisk_size) | |
379 | return; /* No initrd provided by bootloader */ | |
380 | ||
381 | initrd_start = 0; | |
382 | ||
383 | if (ramdisk_size >= (end_of_lowmem>>1)) { | |
384 | free_early(ramdisk_image, ramdisk_end); | |
385 | printk(KERN_ERR "initrd too large to handle, " | |
386 | "disabling initrd\n"); | |
387 | return; | |
388 | } | |
389 | ||
390 | printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, | |
391 | ramdisk_end); | |
392 | ||
393 | ||
394 | if (ramdisk_end <= end_of_lowmem) { | |
395 | /* All in lowmem, easy case */ | |
396 | /* | |
397 | * don't need to reserve again, already reserved early | |
398 | * in i386_start_kernel | |
399 | */ | |
400 | initrd_start = ramdisk_image + PAGE_OFFSET; | |
401 | initrd_end = initrd_start + ramdisk_size; | |
402 | return; | |
403 | } | |
404 | ||
eb1379cb | 405 | relocate_initrd(); |
8c5dd8f4 | 406 | |
eb1379cb | 407 | free_early(ramdisk_image, ramdisk_end); |
cf8fa920 | 408 | } |
225c37d7 | 409 | #else |
eb1379cb | 410 | static void __init reserve_initrd(void) |
225c37d7 YL |
411 | { |
412 | } | |
cf8fa920 PA |
413 | #endif /* CONFIG_BLK_DEV_INITRD */ |
414 | ||
29f784e3 | 415 | static void __init parse_setup_data(void) |
257b0fde YL |
416 | { |
417 | struct setup_data *data; | |
418 | u64 pa_data; | |
419 | ||
420 | if (boot_params.hdr.version < 0x0209) | |
421 | return; | |
422 | pa_data = boot_params.hdr.setup_data; | |
423 | while (pa_data) { | |
88b4c146 | 424 | data = early_memremap(pa_data, PAGE_SIZE); |
257b0fde YL |
425 | switch (data->type) { |
426 | case SETUP_E820_EXT: | |
427 | parse_e820_ext(data, pa_data); | |
428 | break; | |
429 | default: | |
430 | break; | |
431 | } | |
257b0fde YL |
432 | pa_data = data->next; |
433 | early_iounmap(data, PAGE_SIZE); | |
434 | } | |
435 | } | |
436 | ||
a0a0becd | 437 | static void __init e820_reserve_setup_data(void) |
28bb2237 YL |
438 | { |
439 | struct setup_data *data; | |
440 | u64 pa_data; | |
d9a81b44 | 441 | int found = 0; |
28bb2237 YL |
442 | |
443 | if (boot_params.hdr.version < 0x0209) | |
444 | return; | |
445 | pa_data = boot_params.hdr.setup_data; | |
446 | while (pa_data) { | |
88b4c146 | 447 | data = early_memremap(pa_data, sizeof(*data)); |
28bb2237 YL |
448 | e820_update_range(pa_data, sizeof(*data)+data->len, |
449 | E820_RAM, E820_RESERVED_KERN); | |
d9a81b44 | 450 | found = 1; |
28bb2237 YL |
451 | pa_data = data->next; |
452 | early_iounmap(data, sizeof(*data)); | |
453 | } | |
d9a81b44 YL |
454 | if (!found) |
455 | return; | |
456 | ||
28bb2237 | 457 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
a0a0becd | 458 | memcpy(&e820_saved, &e820, sizeof(struct e820map)); |
28bb2237 YL |
459 | printk(KERN_INFO "extended physical RAM map:\n"); |
460 | e820_print_map("reserve setup_data"); | |
461 | } | |
462 | ||
a0a0becd YL |
463 | static void __init reserve_early_setup_data(void) |
464 | { | |
465 | struct setup_data *data; | |
466 | u64 pa_data; | |
467 | char buf[32]; | |
468 | ||
469 | if (boot_params.hdr.version < 0x0209) | |
470 | return; | |
471 | pa_data = boot_params.hdr.setup_data; | |
472 | while (pa_data) { | |
88b4c146 | 473 | data = early_memremap(pa_data, sizeof(*data)); |
a0a0becd YL |
474 | sprintf(buf, "setup data %x", data->type); |
475 | reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); | |
476 | pa_data = data->next; | |
477 | early_iounmap(data, sizeof(*data)); | |
478 | } | |
479 | } | |
480 | ||
ccb4defa YL |
481 | /* |
482 | * --------- Crashkernel reservation ------------------------------ | |
483 | */ | |
484 | ||
485 | #ifdef CONFIG_KEXEC | |
32105f7f BW |
486 | |
487 | /** | |
488 | * Reserve @size bytes of crashkernel memory at any suitable offset. | |
489 | * | |
490 | * @size: Size of the crashkernel memory to reserve. | |
491 | * Returns the base address on success, and -1ULL on failure. | |
492 | */ | |
a9b43c7d | 493 | static |
6b356022 | 494 | unsigned long long __init find_and_reserve_crashkernel(unsigned long long size) |
32105f7f BW |
495 | { |
496 | const unsigned long long alignment = 16<<20; /* 16M */ | |
497 | unsigned long long start = 0LL; | |
498 | ||
499 | while (1) { | |
500 | int ret; | |
501 | ||
502 | start = find_e820_area(start, ULONG_MAX, size, alignment); | |
503 | if (start == -1ULL) | |
504 | return start; | |
505 | ||
506 | /* try to reserve it */ | |
507 | ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE); | |
508 | if (ret >= 0) | |
509 | return start; | |
510 | ||
511 | start += alignment; | |
512 | } | |
513 | } | |
514 | ||
ccb4defa YL |
515 | static inline unsigned long long get_total_mem(void) |
516 | { | |
517 | unsigned long long total; | |
518 | ||
519 | total = max_low_pfn - min_low_pfn; | |
520 | #ifdef CONFIG_HIGHMEM | |
521 | total += highend_pfn - highstart_pfn; | |
522 | #endif | |
523 | ||
524 | return total << PAGE_SHIFT; | |
525 | } | |
526 | ||
29f784e3 | 527 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
528 | { |
529 | unsigned long long total_mem; | |
530 | unsigned long long crash_size, crash_base; | |
531 | int ret; | |
532 | ||
533 | total_mem = get_total_mem(); | |
534 | ||
535 | ret = parse_crashkernel(boot_command_line, total_mem, | |
536 | &crash_size, &crash_base); | |
32105f7f BW |
537 | if (ret != 0 || crash_size <= 0) |
538 | return; | |
539 | ||
540 | /* 0 means: find the address automatically */ | |
541 | if (crash_base <= 0) { | |
542 | crash_base = find_and_reserve_crashkernel(crash_size); | |
543 | if (crash_base == -1ULL) { | |
544 | pr_info("crashkernel reservation failed. " | |
545 | "No suitable area found.\n"); | |
ccb4defa YL |
546 | return; |
547 | } | |
32105f7f BW |
548 | } else { |
549 | ret = reserve_bootmem_generic(crash_base, crash_size, | |
550 | BOOTMEM_EXCLUSIVE); | |
551 | if (ret < 0) { | |
552 | pr_info("crashkernel reservation failed - " | |
553 | "memory is in use\n"); | |
ccb4defa YL |
554 | return; |
555 | } | |
32105f7f | 556 | } |
ccb4defa | 557 | |
32105f7f BW |
558 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " |
559 | "for crashkernel (System RAM: %ldMB)\n", | |
560 | (unsigned long)(crash_size >> 20), | |
561 | (unsigned long)(crash_base >> 20), | |
562 | (unsigned long)(total_mem >> 20)); | |
ccb4defa | 563 | |
32105f7f BW |
564 | crashk_res.start = crash_base; |
565 | crashk_res.end = crash_base + crash_size - 1; | |
566 | insert_resource(&iomem_resource, &crashk_res); | |
ccb4defa YL |
567 | } |
568 | #else | |
29f784e3 | 569 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
570 | { |
571 | } | |
572 | #endif | |
573 | ||
bdba0e70 YL |
574 | static struct resource standard_io_resources[] = { |
575 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
576 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
577 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
578 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
579 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
580 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
581 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
582 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
583 | { .name = "keyboard", .start = 0x60, .end = 0x60, | |
584 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
585 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
586 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
587 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
588 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
589 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
590 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
591 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
592 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
593 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
594 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
595 | }; | |
596 | ||
8fee697d | 597 | void __init reserve_standard_io_resources(void) |
bdba0e70 YL |
598 | { |
599 | int i; | |
600 | ||
601 | /* request I/O space for devices used on all i[345]86 PCs */ | |
602 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
603 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
604 | ||
605 | } | |
606 | ||
57cac4d1 VG |
607 | /* |
608 | * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by | |
609 | * is_kdump_kernel() to determine if we are booting after a panic. Hence | |
610 | * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. | |
611 | */ | |
612 | ||
613 | #ifdef CONFIG_CRASH_DUMP | |
0196bcbb YL |
614 | /* elfcorehdr= specifies the location of elf core header |
615 | * stored by the crashed kernel. This option will be passed | |
616 | * by kexec loader to the capture kernel. | |
617 | */ | |
618 | static int __init setup_elfcorehdr(char *arg) | |
619 | { | |
620 | char *end; | |
621 | if (!arg) | |
622 | return -EINVAL; | |
623 | elfcorehdr_addr = memparse(arg, &end); | |
624 | return end > arg ? 0 : -EINVAL; | |
625 | } | |
626 | early_param("elfcorehdr", setup_elfcorehdr); | |
627 | #endif | |
628 | ||
bb557460 | 629 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
5649b7c3 IM |
630 | static int __init dmi_low_memory_corruption(const struct dmi_system_id *d) |
631 | { | |
632 | printk(KERN_NOTICE | |
45608399 | 633 | "%s detected: BIOS may corrupt low RAM, working around it.\n", |
5649b7c3 IM |
634 | d->ident); |
635 | ||
2216d199 YL |
636 | e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED); |
637 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
5649b7c3 IM |
638 | |
639 | return 0; | |
640 | } | |
bb557460 | 641 | #endif |
5649b7c3 IM |
642 | |
643 | /* List of systems that have known low memory corruption BIOS problems */ | |
644 | static struct dmi_system_id __initdata bad_bios_dmi_table[] = { | |
fc381519 | 645 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
5649b7c3 IM |
646 | { |
647 | .callback = dmi_low_memory_corruption, | |
648 | .ident = "AMI BIOS", | |
649 | .matches = { | |
650 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), | |
651 | }, | |
652 | }, | |
1e22436e IM |
653 | { |
654 | .callback = dmi_low_memory_corruption, | |
655 | .ident = "Phoenix BIOS", | |
656 | .matches = { | |
0af40a4b | 657 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"), |
1e22436e IM |
658 | }, |
659 | }, | |
6aa542a6 AF |
660 | { |
661 | /* | |
662 | * AMI BIOS with low memory corruption was found on Intel DG45ID board. | |
663 | * It hase different DMI_BIOS_VENDOR = "Intel Corp.", for now we will | |
664 | * match only DMI_BOARD_NAME and see if there is more bad products | |
665 | * with this vendor. | |
666 | */ | |
667 | .callback = dmi_low_memory_corruption, | |
668 | .ident = "AMI BIOS", | |
669 | .matches = { | |
670 | DMI_MATCH(DMI_BOARD_NAME, "DG45ID"), | |
671 | }, | |
672 | }, | |
fc381519 | 673 | #endif |
a8b71a28 | 674 | {} |
5649b7c3 IM |
675 | }; |
676 | ||
1da177e4 LT |
677 | /* |
678 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
679 | * passed the efi memmap, systab, etc., so we should use these data structures | |
680 | * for initialization. Note, the efi init code path is determined by the | |
681 | * global efi_enabled. This allows the same kernel image to be used on existing | |
682 | * systems (with a traditional BIOS) as well as on EFI systems. | |
683 | */ | |
76934ed4 YL |
684 | /* |
685 | * setup_arch - architecture-specific boot-time initializations | |
686 | * | |
687 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
688 | */ | |
689 | ||
1da177e4 LT |
690 | void __init setup_arch(char **cmdline_p) |
691 | { | |
76934ed4 | 692 | #ifdef CONFIG_X86_32 |
1da177e4 | 693 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
3b33553b | 694 | visws_early_detect(); |
76934ed4 YL |
695 | #else |
696 | printk(KERN_INFO "Command line: %s\n", boot_command_line); | |
697 | #endif | |
1da177e4 | 698 | |
ae8d04e2 ZA |
699 | /* VMI may relocate the fixmap; do this before touching ioremap area */ |
700 | vmi_init(); | |
701 | ||
9e882c92 | 702 | early_cpu_init(); |
1a98fd14 JF |
703 | early_ioremap_init(); |
704 | ||
30c82645 PA |
705 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
706 | screen_info = boot_params.screen_info; | |
707 | edid_info = boot_params.edid_info; | |
76934ed4 | 708 | #ifdef CONFIG_X86_32 |
30c82645 PA |
709 | apm_info.bios = boot_params.apm_bios_info; |
710 | ist_info = boot_params.ist_info; | |
76934ed4 | 711 | if (boot_params.sys_desc_table.length != 0) { |
30c82645 PA |
712 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); |
713 | machine_id = boot_params.sys_desc_table.table[0]; | |
714 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
715 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 716 | } |
76934ed4 YL |
717 | #endif |
718 | saved_video_mode = boot_params.hdr.vid_mode; | |
30c82645 | 719 | bootloader_type = boot_params.hdr.type_of_loader; |
5031296c PA |
720 | if ((bootloader_type >> 4) == 0xe) { |
721 | bootloader_type &= 0xf; | |
722 | bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; | |
723 | } | |
724 | bootloader_version = bootloader_type & 0xf; | |
725 | bootloader_version |= boot_params.hdr.ext_loader_ver << 4; | |
1da177e4 LT |
726 | |
727 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
728 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
729 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
730 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 731 | #endif |
7465252e YL |
732 | #ifdef CONFIG_EFI |
733 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
76934ed4 YL |
734 | #ifdef CONFIG_X86_32 |
735 | "EL32", | |
736 | #else | |
737 | "EL64", | |
738 | #endif | |
739 | 4)) { | |
7465252e YL |
740 | efi_enabled = 1; |
741 | efi_reserve_early(); | |
742 | } | |
743 | #endif | |
744 | ||
42bbdb43 | 745 | x86_init.oem.arch_setup(); |
2215e69d | 746 | |
0dbfafa5 | 747 | setup_memory_map(); |
28bb2237 | 748 | parse_setup_data(); |
a0a0becd YL |
749 | /* update the e820_saved too */ |
750 | e820_reserve_setup_data(); | |
28bb2237 | 751 | |
1da177e4 LT |
752 | copy_edd(); |
753 | ||
30c82645 | 754 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
755 | root_mountflags &= ~MS_RDONLY; |
756 | init_mm.start_code = (unsigned long) _text; | |
757 | init_mm.end_code = (unsigned long) _etext; | |
758 | init_mm.end_data = (unsigned long) _edata; | |
93dbda7c | 759 | init_mm.brk = _brk_end; |
1da177e4 LT |
760 | |
761 | code_resource.start = virt_to_phys(_text); | |
762 | code_resource.end = virt_to_phys(_etext)-1; | |
763 | data_resource.start = virt_to_phys(_etext); | |
764 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
765 | bss_resource.start = virt_to_phys(&__bss_start); |
766 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 767 | |
516cbf37 TB |
768 | #ifdef CONFIG_CMDLINE_BOOL |
769 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
770 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
771 | #else | |
772 | if (builtin_cmdline[0]) { | |
773 | /* append boot loader cmdline to builtin */ | |
774 | strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); | |
775 | strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); | |
776 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
777 | } | |
778 | #endif | |
779 | #endif | |
780 | ||
9a2e5930 YL |
781 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
782 | *cmdline_p = command_line; | |
783 | ||
1a3f239d | 784 | parse_early_param(); |
1da177e4 | 785 | |
0ad5bce7 JF |
786 | #ifdef CONFIG_X86_64 |
787 | check_efer(); | |
788 | #endif | |
789 | ||
ae8d04e2 ZA |
790 | /* Must be before kernel pagetables are setup */ |
791 | vmi_activate(); | |
3a6ddd5f | 792 | |
28bb2237 | 793 | /* after early param, so could get panic from serial */ |
a0a0becd | 794 | reserve_early_setup_data(); |
28bb2237 | 795 | |
76934ed4 | 796 | if (acpi_mps_check()) { |
3eb11edc | 797 | #ifdef CONFIG_X86_LOCAL_APIC |
76934ed4 | 798 | disable_apic = 1; |
3eb11edc | 799 | #endif |
988781dc | 800 | setup_clear_cpu_cap(X86_FEATURE_APIC); |
3c999f14 YL |
801 | } |
802 | ||
dc7c65db LT |
803 | #ifdef CONFIG_PCI |
804 | if (pci_early_dump_regs) | |
805 | early_dump_pci_devices(); | |
806 | #endif | |
807 | ||
0dbfafa5 | 808 | finish_e820_parsing(); |
1a3f239d | 809 | |
ff0c0874 BM |
810 | if (efi_enabled) |
811 | efi_init(); | |
812 | ||
2216d199 YL |
813 | dmi_scan_machine(); |
814 | ||
815 | dmi_check_system(bad_bios_dmi_table); | |
816 | ||
88b094fb AK |
817 | /* |
818 | * VMware detection requires dmi to be available, so this | |
819 | * needs to be done after dmi_scan_machine, for the BP. | |
820 | */ | |
821 | init_hypervisor(&boot_cpu_data); | |
822 | ||
f7cf5a5b | 823 | x86_init.resources.probe_roms(); |
41c094fd YL |
824 | |
825 | /* after parse_early_param, so could debug it */ | |
826 | insert_resource(&iomem_resource, &code_resource); | |
827 | insert_resource(&iomem_resource, &data_resource); | |
828 | insert_resource(&iomem_resource, &bss_resource); | |
829 | ||
8b2cb7a8 | 830 | |
76934ed4 | 831 | #ifdef CONFIG_X86_32 |
cc9f7a0c YL |
832 | if (ppro_with_ram_bug()) { |
833 | e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, | |
834 | E820_RESERVED); | |
835 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
836 | printk(KERN_INFO "fixed physical RAM map:\n"); | |
837 | e820_print_map("bad_ppro"); | |
838 | } | |
76934ed4 YL |
839 | #else |
840 | early_gart_iommu_check(); | |
841 | #endif | |
cc9f7a0c | 842 | |
7b2a0a6c YL |
843 | /* |
844 | * partially used pages are not usable - thus | |
845 | * we are rounding upwards: | |
846 | */ | |
f361a450 | 847 | max_pfn = e820_end_of_ram_pfn(); |
7b2a0a6c | 848 | |
6780711e YL |
849 | /* preallocate 4k for mptable mpc */ |
850 | early_reserve_e820_mpc_new(); | |
093af8d7 YL |
851 | /* update e820 for memory not covered by WB MTRRs */ |
852 | mtrr_bp_init(); | |
2dc807b3 | 853 | if (mtrr_trim_uncached_memory(max_pfn)) |
f361a450 | 854 | max_pfn = e820_end_of_ram_pfn(); |
76c32418 | 855 | |
76934ed4 | 856 | #ifdef CONFIG_X86_32 |
4e29684c | 857 | /* max_low_pfn get updated here */ |
2ec65f8b | 858 | find_low_pfn_range(); |
76934ed4 YL |
859 | #else |
860 | num_physpages = max_pfn; | |
861 | ||
06cd9a7d | 862 | check_x2apic(); |
76934ed4 YL |
863 | |
864 | /* How many end-of-memory variables you have, grandma! */ | |
865 | /* need this before calling reserve_initrd */ | |
f361a450 YL |
866 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
867 | max_low_pfn = e820_end_of_low_ram_pfn(); | |
868 | else | |
869 | max_low_pfn = max_pfn; | |
870 | ||
76934ed4 | 871 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
80989ce0 | 872 | max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT; |
76934ed4 | 873 | #endif |
2ec65f8b | 874 | |
5394f80f JF |
875 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION |
876 | setup_bios_corruption_check(); | |
877 | #endif | |
878 | ||
80989ce0 YL |
879 | printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n", |
880 | max_pfn_mapped<<PAGE_SHIFT); | |
881 | ||
93dbda7c JF |
882 | reserve_brk(); |
883 | ||
854c879f PE |
884 | init_gbpages(); |
885 | ||
4e29684c | 886 | /* max_pfn_mapped is updated here */ |
f361a450 YL |
887 | max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); |
888 | max_pfn_mapped = max_low_pfn_mapped; | |
889 | ||
890 | #ifdef CONFIG_X86_64 | |
891 | if (max_pfn > max_low_pfn) { | |
892 | max_pfn_mapped = init_memory_mapping(1UL<<32, | |
893 | max_pfn<<PAGE_SHIFT); | |
894 | /* can we preseve max_low_pfn ?*/ | |
895 | max_low_pfn = max_pfn; | |
896 | } | |
897 | #endif | |
4e29684c | 898 | |
e7b37895 YL |
899 | /* |
900 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
901 | */ | |
902 | ||
903 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
904 | if (init_ohci1394_dma_early) | |
905 | init_ohci1394_dma_on_all_controllers(); | |
906 | #endif | |
907 | ||
2ec65f8b YL |
908 | reserve_initrd(); |
909 | ||
76934ed4 | 910 | vsmp_init(); |
76934ed4 | 911 | |
1c6e5503 YL |
912 | io_delay_init(); |
913 | ||
1c6e5503 YL |
914 | /* |
915 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
916 | */ | |
917 | acpi_boot_table_init(); | |
1c6e5503 | 918 | |
2e42060c JS |
919 | early_acpi_boot_init(); |
920 | ||
1c6e5503 | 921 | #ifdef CONFIG_ACPI_NUMA |
f2f865fe YL |
922 | /* |
923 | * Parse SRAT to discover nodes. | |
924 | */ | |
925 | acpi_numa_init(); | |
1c6e5503 YL |
926 | #endif |
927 | ||
2ec65f8b | 928 | initmem_init(0, max_pfn); |
093af8d7 | 929 | |
593a0cc3 YL |
930 | #ifdef CONFIG_ACPI_SLEEP |
931 | /* | |
932 | * Reserve low memory region for sleep support. | |
933 | */ | |
934 | acpi_reserve_bootmem(); | |
935 | #endif | |
593a0cc3 YL |
936 | /* |
937 | * Find and reserve possible boot-time SMP configuration: | |
938 | */ | |
939 | find_smp_config(); | |
550fe4f1 | 940 | |
593a0cc3 YL |
941 | reserve_crashkernel(); |
942 | ||
91467bdf BW |
943 | #ifdef CONFIG_X86_64 |
944 | /* | |
945 | * dma32_reserve_bootmem() allocates bootmem which may conflict | |
946 | * with the crashkernel command line, so do that after | |
947 | * reserve_crashkernel() | |
948 | */ | |
949 | dma32_reserve_bootmem(); | |
950 | #endif | |
951 | ||
593a0cc3 YL |
952 | reserve_ibft_region(); |
953 | ||
790c73f6 GOC |
954 | #ifdef CONFIG_KVM_CLOCK |
955 | kvmclock_init(); | |
956 | #endif | |
957 | ||
030cb6c0 | 958 | x86_init.paging.pagetable_setup_start(swapper_pg_dir); |
1da177e4 | 959 | paging_init(); |
030cb6c0 | 960 | x86_init.paging.pagetable_setup_done(swapper_pg_dir); |
f212ec4b | 961 | |
76934ed4 YL |
962 | #ifdef CONFIG_X86_64 |
963 | map_vsyscall(); | |
964 | #endif | |
965 | ||
1a3f239d | 966 | generic_apic_probe(); |
1da177e4 | 967 | |
54ef3400 | 968 | early_quirks(); |
d44647b0 | 969 | |
295deae4 YL |
970 | /* |
971 | * Read APIC and some other early information from ACPI tables. | |
972 | */ | |
1da177e4 | 973 | acpi_boot_init(); |
04606618 | 974 | |
295deae4 YL |
975 | /* |
976 | * get boot-time SMP configuration: | |
977 | */ | |
e0da3364 YL |
978 | if (smp_found_config) |
979 | get_smp_config(); | |
76934ed4 | 980 | |
329513a3 | 981 | prefill_possible_map(); |
301e6190 | 982 | |
5f4765f9 YL |
983 | #ifdef CONFIG_X86_64 |
984 | init_cpu_to_node(); | |
985 | #endif | |
986 | ||
76934ed4 YL |
987 | init_apic_mappings(); |
988 | ioapic_init_mappings(); | |
f3294a33 | 989 | |
9d6a4d08 | 990 | /* need to wait for io_apic is mapped */ |
be5d5350 | 991 | probe_nr_irqs_gsi(); |
9d6a4d08 | 992 | |
295deae4 | 993 | kvm_guest_init(); |
1da177e4 | 994 | |
41c094fd | 995 | e820_reserve_resources(); |
bf62f398 | 996 | e820_mark_nosave_regions(max_low_pfn); |
1da177e4 | 997 | |
8fee697d | 998 | x86_init.resources.reserve_resources(); |
41c094fd YL |
999 | |
1000 | e820_setup_gap(); | |
1001 | ||
1da177e4 LT |
1002 | #ifdef CONFIG_VT |
1003 | #if defined(CONFIG_VGA_CONSOLE) | |
1004 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
1005 | conswitchp = &vga_con; | |
1006 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
1007 | conswitchp = &dummy_con; | |
1008 | #endif | |
1009 | #endif | |
6f30c1ac | 1010 | x86_init.oem.banner(); |
1da177e4 | 1011 | } |
5649b7c3 | 1012 | |
9be1b56a IM |
1013 | #ifdef CONFIG_X86_32 |
1014 | ||
8fee697d TG |
1015 | static struct resource video_ram_resource = { |
1016 | .name = "Video RAM area", | |
1017 | .start = 0xa0000, | |
1018 | .end = 0xbffff, | |
1019 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
1020 | }; | |
1021 | ||
1022 | void __init i386_reserve_resources(void) | |
1023 | { | |
1024 | request_resource(&iomem_resource, &video_ram_resource); | |
1025 | reserve_standard_io_resources(); | |
1026 | } | |
1027 | ||
9be1b56a | 1028 | #endif /* CONFIG_X86_32 */ |