Commit | Line | Data |
---|---|---|
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> | |
efafc8b2 | 30 | #include <linux/sfi.h> |
1da177e4 LT |
31 | #include <linux/apm_bios.h> |
32 | #include <linux/initrd.h> | |
33 | #include <linux/bootmem.h> | |
72d7c3b3 | 34 | #include <linux/memblock.h> |
1da177e4 LT |
35 | #include <linux/seq_file.h> |
36 | #include <linux/console.h> | |
1da177e4 LT |
37 | #include <linux/root_dev.h> |
38 | #include <linux/highmem.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/efi.h> | |
41 | #include <linux/init.h> | |
42 | #include <linux/edd.h> | |
138fe4e0 | 43 | #include <linux/iscsi_ibft.h> |
1da177e4 | 44 | #include <linux/nodemask.h> |
1bc3b91a | 45 | #include <linux/kexec.h> |
e9928674 | 46 | #include <linux/dmi.h> |
22a9835c | 47 | #include <linux/pfn.h> |
376ff035 | 48 | #include <linux/pci.h> |
46d671b5 | 49 | #include <asm/pci-direct.h> |
f212ec4b | 50 | #include <linux/init_ohci1394_dma.h> |
790c73f6 | 51 | #include <linux/kvm_para.h> |
0a2b9a6e | 52 | #include <linux/dma-contiguous.h> |
1bc3b91a | 53 | |
46d671b5 YL |
54 | #include <linux/errno.h> |
55 | #include <linux/kernel.h> | |
56 | #include <linux/stddef.h> | |
57 | #include <linux/unistd.h> | |
58 | #include <linux/ptrace.h> | |
46d671b5 YL |
59 | #include <linux/user.h> |
60 | #include <linux/delay.h> | |
46d671b5 YL |
61 | |
62 | #include <linux/kallsyms.h> | |
46d671b5 YL |
63 | #include <linux/cpufreq.h> |
64 | #include <linux/dma-mapping.h> | |
65 | #include <linux/ctype.h> | |
66 | #include <linux/uaccess.h> | |
67 | ||
68 | #include <linux/percpu.h> | |
69 | #include <linux/crash_dump.h> | |
69575d38 | 70 | #include <linux/tboot.h> |
b3c869d3 | 71 | #include <linux/jiffies.h> |
46d671b5 | 72 | |
1da177e4 | 73 | #include <video/edid.h> |
1bc3b91a | 74 | |
093af8d7 | 75 | #include <asm/mtrr.h> |
9635b47d | 76 | #include <asm/apic.h> |
084ee1c6 | 77 | #include <asm/realmode.h> |
1da177e4 LT |
78 | #include <asm/e820.h> |
79 | #include <asm/mpspec.h> | |
80 | #include <asm/setup.h> | |
55f26239 | 81 | #include <asm/efi.h> |
8e6dafd6 IM |
82 | #include <asm/timer.h> |
83 | #include <asm/i8259.h> | |
1da177e4 | 84 | #include <asm/sections.h> |
1c6e5503 | 85 | #include <asm/dmi.h> |
1da177e4 LT |
86 | #include <asm/io_apic.h> |
87 | #include <asm/ist.h> | |
1164dd00 | 88 | #include <asm/setup_arch.h> |
ce3fe6b2 | 89 | #include <asm/bios_ebda.h> |
00bf4098 | 90 | #include <asm/cacheflush.h> |
2fde61fd | 91 | #include <asm/processor.h> |
cc9f7a0c | 92 | #include <asm/bugs.h> |
1da177e4 | 93 | |
46d671b5 | 94 | #include <asm/vsyscall.h> |
6e5385d4 | 95 | #include <asm/cpu.h> |
46d671b5 YL |
96 | #include <asm/desc.h> |
97 | #include <asm/dma.h> | |
46a7fa27 | 98 | #include <asm/iommu.h> |
1d9b16d1 | 99 | #include <asm/gart.h> |
46d671b5 YL |
100 | #include <asm/mmu_context.h> |
101 | #include <asm/proto.h> | |
102 | ||
46d671b5 | 103 | #include <asm/paravirt.h> |
88b094fb | 104 | #include <asm/hypervisor.h> |
fd699c76 | 105 | #include <asm/olpc_ofw.h> |
46d671b5 YL |
106 | |
107 | #include <asm/percpu.h> | |
46d671b5 YL |
108 | #include <asm/topology.h> |
109 | #include <asm/apicdef.h> | |
23ac4ae8 | 110 | #include <asm/amd_nb.h> |
55f26239 YL |
111 | #ifdef CONFIG_X86_64 |
112 | #include <asm/numa_64.h> | |
113 | #endif | |
a2202aa2 | 114 | #include <asm/mce.h> |
f49aa448 | 115 | #include <asm/alternative.h> |
da6b737b | 116 | #include <asm/prom.h> |
46d671b5 | 117 | |
2b72394e | 118 | /* |
66520ebc JS |
119 | * max_low_pfn_mapped: highest direct mapped pfn under 4GB |
120 | * max_pfn_mapped: highest direct mapped pfn over 4GB | |
121 | * | |
122 | * The direct mapping only covers E820_RAM regions, so the ranges and gaps are | |
123 | * represented by pfn_mapped | |
2b72394e PE |
124 | */ |
125 | unsigned long max_low_pfn_mapped; | |
126 | unsigned long max_pfn_mapped; | |
127 | ||
e808bae2 | 128 | #ifdef CONFIG_DMI |
796216a5 | 129 | RESERVE_BRK(dmi_alloc, 65536); |
e808bae2 | 130 | #endif |
796216a5 | 131 | |
c0b5842a | 132 | |
93dbda7c JF |
133 | static __initdata unsigned long _brk_start = (unsigned long)__brk_base; |
134 | unsigned long _brk_end = (unsigned long)__brk_base; | |
135 | ||
c0b5842a IM |
136 | #ifdef CONFIG_X86_64 |
137 | int default_cpu_present_to_apicid(int mps_cpu) | |
138 | { | |
139 | return __default_cpu_present_to_apicid(mps_cpu); | |
140 | } | |
141 | ||
e11dadab | 142 | int default_check_phys_apicid_present(int phys_apicid) |
c0b5842a | 143 | { |
e11dadab | 144 | return __default_check_phys_apicid_present(phys_apicid); |
c0b5842a IM |
145 | } |
146 | #endif | |
147 | ||
217b8ce8 YL |
148 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
149 | struct boot_params __initdata boot_params; | |
150 | #else | |
151 | struct boot_params boot_params; | |
152 | #endif | |
153 | ||
1da177e4 LT |
154 | /* |
155 | * Machine setup.. | |
156 | */ | |
c9cce83d BW |
157 | static struct resource data_resource = { |
158 | .name = "Kernel data", | |
159 | .start = 0, | |
160 | .end = 0, | |
161 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
162 | }; | |
163 | ||
164 | static struct resource code_resource = { | |
165 | .name = "Kernel code", | |
166 | .start = 0, | |
167 | .end = 0, | |
168 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
169 | }; | |
170 | ||
171 | static struct resource bss_resource = { | |
172 | .name = "Kernel bss", | |
173 | .start = 0, | |
174 | .end = 0, | |
175 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
176 | }; | |
177 | ||
7dea23ec YL |
178 | |
179 | #ifdef CONFIG_X86_32 | |
1da177e4 | 180 | /* cpu data as detected by the assembly code in head.S */ |
7dea23ec | 181 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
1da177e4 | 182 | /* common cpu data for all cpus */ |
7dea23ec | 183 | struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
129f6946 | 184 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 | 185 | |
0c254e38 AS |
186 | unsigned int def_to_bigsmp; |
187 | ||
1da177e4 LT |
188 | /* for MCA, but anyone else can use it if they want */ |
189 | unsigned int machine_id; | |
190 | unsigned int machine_submodel_id; | |
191 | unsigned int BIOS_revision; | |
1da177e4 | 192 | |
7dea23ec YL |
193 | struct apm_info apm_info; |
194 | EXPORT_SYMBOL(apm_info); | |
195 | ||
196 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ | |
197 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
198 | struct ist_info ist_info; | |
199 | EXPORT_SYMBOL(ist_info); | |
200 | #else | |
201 | struct ist_info ist_info; | |
202 | #endif | |
203 | ||
204 | #else | |
ed26dbe5 JF |
205 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { |
206 | .x86_phys_bits = MAX_PHYSMEM_BITS, | |
207 | }; | |
7dea23ec YL |
208 | EXPORT_SYMBOL(boot_cpu_data); |
209 | #endif | |
210 | ||
211 | ||
212 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) | |
213 | unsigned long mmu_cr4_features; | |
214 | #else | |
215 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
216 | #endif | |
217 | ||
5031296c PA |
218 | /* Boot loader ID and version as integers, for the benefit of proc_dointvec */ |
219 | int bootloader_type, bootloader_version; | |
1da177e4 | 220 | |
1da177e4 LT |
221 | /* |
222 | * Setup options | |
223 | */ | |
1da177e4 | 224 | struct screen_info screen_info; |
129f6946 | 225 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 226 | struct edid_info edid_info; |
5e518d76 | 227 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 228 | |
1da177e4 LT |
229 | extern int root_mountflags; |
230 | ||
e44b7b75 | 231 | unsigned long saved_video_mode; |
1da177e4 | 232 | |
cf8fa920 | 233 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 234 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 235 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 236 | |
4e498b66 | 237 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
516cbf37 TB |
238 | #ifdef CONFIG_CMDLINE_BOOL |
239 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
240 | #endif | |
1da177e4 | 241 | |
1da177e4 LT |
242 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
243 | struct edd edd; | |
244 | #ifdef CONFIG_EDD_MODULE | |
245 | EXPORT_SYMBOL(edd); | |
246 | #endif | |
247 | /** | |
248 | * copy_edd() - Copy the BIOS EDD information | |
249 | * from boot_params into a safe place. | |
250 | * | |
251 | */ | |
9eaa192d | 252 | static inline void __init copy_edd(void) |
1da177e4 | 253 | { |
30c82645 PA |
254 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
255 | sizeof(edd.mbr_signature)); | |
256 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
257 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
258 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
259 | } |
260 | #else | |
9eaa192d | 261 | static inline void __init copy_edd(void) |
1da177e4 LT |
262 | { |
263 | } | |
264 | #endif | |
265 | ||
5368a2be PA |
266 | void * __init extend_brk(size_t size, size_t align) |
267 | { | |
268 | size_t mask = align - 1; | |
269 | void *ret; | |
270 | ||
271 | BUG_ON(_brk_start == 0); | |
272 | BUG_ON(align & mask); | |
273 | ||
274 | _brk_end = (_brk_end + mask) & ~mask; | |
275 | BUG_ON((char *)(_brk_end + size) > __brk_limit); | |
276 | ||
277 | ret = (void *)_brk_end; | |
278 | _brk_end += size; | |
279 | ||
280 | memset(ret, 0, size); | |
281 | ||
282 | return ret; | |
283 | } | |
284 | ||
854c879f PE |
285 | #ifdef CONFIG_X86_64 |
286 | static void __init init_gbpages(void) | |
287 | { | |
288 | if (direct_gbpages && cpu_has_gbpages) | |
289 | printk(KERN_INFO "Using GB pages for direct mapping\n"); | |
290 | else | |
291 | direct_gbpages = 0; | |
292 | } | |
293 | #else | |
294 | static inline void init_gbpages(void) | |
295 | { | |
296 | } | |
e5f15b45 | 297 | static void __init cleanup_highmap(void) |
f005fe12 YL |
298 | { |
299 | } | |
854c879f PE |
300 | #endif |
301 | ||
5368a2be PA |
302 | static void __init reserve_brk(void) |
303 | { | |
304 | if (_brk_end > _brk_start) | |
24aa0788 TH |
305 | memblock_reserve(__pa(_brk_start), |
306 | __pa(_brk_end) - __pa(_brk_start)); | |
5368a2be PA |
307 | |
308 | /* Mark brk area as locked down and no longer taking any | |
309 | new allocations */ | |
310 | _brk_start = 0; | |
311 | } | |
312 | ||
cf8fa920 PA |
313 | #ifdef CONFIG_BLK_DEV_INITRD |
314 | ||
eb1379cb YL |
315 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) |
316 | static void __init relocate_initrd(void) | |
cf8fa920 | 317 | { |
c967da6a | 318 | /* Assume only end is not page aligned */ |
ba5b14cc YL |
319 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
320 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
c967da6a | 321 | u64 area_size = PAGE_ALIGN(ramdisk_size); |
ba5b14cc | 322 | u64 ramdisk_here; |
eb1379cb YL |
323 | unsigned long slop, clen, mapaddr; |
324 | char *p, *q; | |
cf8fa920 | 325 | |
e8c57d40 YL |
326 | /* We need to move the initrd down into directly mapped mem */ |
327 | ramdisk_here = memblock_find_in_range(0, PFN_PHYS(max_low_pfn_mapped), | |
328 | area_size, PAGE_SIZE); | |
cf8fa920 | 329 | |
1f5026a7 | 330 | if (!ramdisk_here) |
3945e2c9 YL |
331 | panic("Cannot find place for new RAMDISK of size %lld\n", |
332 | ramdisk_size); | |
333 | ||
e8c57d40 | 334 | /* Note: this includes all the mem currently occupied by |
cf8fa920 | 335 | the initrd, we rely on that fact to keep the data intact. */ |
24aa0788 | 336 | memblock_reserve(ramdisk_here, area_size); |
cf8fa920 PA |
337 | initrd_start = ramdisk_here + PAGE_OFFSET; |
338 | initrd_end = initrd_start + ramdisk_size; | |
365811d6 BH |
339 | printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n", |
340 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
cf8fa920 | 341 | |
cf8fa920 PA |
342 | q = (char *)initrd_start; |
343 | ||
e8c57d40 | 344 | /* Copy the initrd */ |
cf8fa920 PA |
345 | while (ramdisk_size) { |
346 | slop = ramdisk_image & ~PAGE_MASK; | |
347 | clen = ramdisk_size; | |
348 | if (clen > MAX_MAP_CHUNK-slop) | |
349 | clen = MAX_MAP_CHUNK-slop; | |
350 | mapaddr = ramdisk_image & PAGE_MASK; | |
88b4c146 | 351 | p = early_memremap(mapaddr, clen+slop); |
cf8fa920 | 352 | memcpy(q, p+slop, clen); |
beacfaac | 353 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
354 | q += clen; |
355 | ramdisk_image += clen; | |
356 | ramdisk_size -= clen; | |
357 | } | |
e8c57d40 | 358 | |
ba5b14cc YL |
359 | ramdisk_image = boot_params.hdr.ramdisk_image; |
360 | ramdisk_size = boot_params.hdr.ramdisk_size; | |
365811d6 BH |
361 | printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to" |
362 | " [mem %#010llx-%#010llx]\n", | |
ba5b14cc YL |
363 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
364 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
eb1379cb | 365 | } |
9a27f5c5 | 366 | |
e8c57d40 YL |
367 | static u64 __init get_mem_size(unsigned long limit_pfn) |
368 | { | |
369 | int i; | |
370 | u64 mapped_pages = 0; | |
371 | unsigned long start_pfn, end_pfn; | |
372 | ||
373 | for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, NULL) { | |
374 | start_pfn = min_t(unsigned long, start_pfn, limit_pfn); | |
375 | end_pfn = min_t(unsigned long, end_pfn, limit_pfn); | |
376 | mapped_pages += end_pfn - start_pfn; | |
377 | } | |
378 | ||
379 | return mapped_pages << PAGE_SHIFT; | |
380 | } | |
eb1379cb YL |
381 | static void __init reserve_initrd(void) |
382 | { | |
c967da6a | 383 | /* Assume only end is not page aligned */ |
eb1379cb YL |
384 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
385 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
c967da6a | 386 | u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
e8c57d40 | 387 | u64 mapped_size; |
eb1379cb YL |
388 | |
389 | if (!boot_params.hdr.type_of_loader || | |
390 | !ramdisk_image || !ramdisk_size) | |
391 | return; /* No initrd provided by bootloader */ | |
392 | ||
393 | initrd_start = 0; | |
394 | ||
e8c57d40 YL |
395 | mapped_size = get_mem_size(max_low_pfn_mapped); |
396 | if (ramdisk_size >= (mapped_size>>1)) | |
ab7b64e9 PJ |
397 | panic("initrd too large to handle, " |
398 | "disabling initrd (%lld needed, %lld available)\n", | |
e8c57d40 | 399 | ramdisk_size, mapped_size>>1); |
eb1379cb | 400 | |
365811d6 BH |
401 | printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image, |
402 | ramdisk_end - 1); | |
eb1379cb | 403 | |
e8c57d40 YL |
404 | if (ramdisk_end <= (max_low_pfn_mapped<<PAGE_SHIFT) && |
405 | pfn_range_is_mapped(PFN_DOWN(ramdisk_image), | |
406 | PFN_DOWN(ramdisk_end))) { | |
407 | /* All are mapped, easy case */ | |
eb1379cb YL |
408 | /* |
409 | * don't need to reserve again, already reserved early | |
410 | * in i386_start_kernel | |
411 | */ | |
412 | initrd_start = ramdisk_image + PAGE_OFFSET; | |
413 | initrd_end = initrd_start + ramdisk_size; | |
414 | return; | |
415 | } | |
416 | ||
eb1379cb | 417 | relocate_initrd(); |
8c5dd8f4 | 418 | |
24aa0788 | 419 | memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); |
cf8fa920 | 420 | } |
225c37d7 | 421 | #else |
eb1379cb | 422 | static void __init reserve_initrd(void) |
225c37d7 YL |
423 | { |
424 | } | |
cf8fa920 PA |
425 | #endif /* CONFIG_BLK_DEV_INITRD */ |
426 | ||
29f784e3 | 427 | static void __init parse_setup_data(void) |
257b0fde YL |
428 | { |
429 | struct setup_data *data; | |
430 | u64 pa_data; | |
431 | ||
432 | if (boot_params.hdr.version < 0x0209) | |
433 | return; | |
434 | pa_data = boot_params.hdr.setup_data; | |
435 | while (pa_data) { | |
f1c2b357 SAS |
436 | u32 data_len, map_len; |
437 | ||
438 | map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK), | |
439 | (u64)sizeof(struct setup_data)); | |
440 | data = early_memremap(pa_data, map_len); | |
441 | data_len = data->len + sizeof(struct setup_data); | |
442 | if (data_len > map_len) { | |
443 | early_iounmap(data, map_len); | |
444 | data = early_memremap(pa_data, data_len); | |
445 | map_len = data_len; | |
446 | } | |
447 | ||
257b0fde YL |
448 | switch (data->type) { |
449 | case SETUP_E820_EXT: | |
f1c2b357 | 450 | parse_e820_ext(data); |
257b0fde | 451 | break; |
da6b737b SAS |
452 | case SETUP_DTB: |
453 | add_dtb(pa_data); | |
257b0fde YL |
454 | break; |
455 | default: | |
456 | break; | |
457 | } | |
257b0fde | 458 | pa_data = data->next; |
f1c2b357 | 459 | early_iounmap(data, map_len); |
257b0fde YL |
460 | } |
461 | } | |
462 | ||
a0a0becd | 463 | static void __init e820_reserve_setup_data(void) |
28bb2237 YL |
464 | { |
465 | struct setup_data *data; | |
466 | u64 pa_data; | |
d9a81b44 | 467 | int found = 0; |
28bb2237 YL |
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)); |
28bb2237 YL |
474 | e820_update_range(pa_data, sizeof(*data)+data->len, |
475 | E820_RAM, E820_RESERVED_KERN); | |
d9a81b44 | 476 | found = 1; |
28bb2237 YL |
477 | pa_data = data->next; |
478 | early_iounmap(data, sizeof(*data)); | |
479 | } | |
d9a81b44 YL |
480 | if (!found) |
481 | return; | |
482 | ||
28bb2237 | 483 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
a0a0becd | 484 | memcpy(&e820_saved, &e820, sizeof(struct e820map)); |
28bb2237 YL |
485 | printk(KERN_INFO "extended physical RAM map:\n"); |
486 | e820_print_map("reserve setup_data"); | |
487 | } | |
488 | ||
a9ce6bc1 | 489 | static void __init memblock_x86_reserve_range_setup_data(void) |
a0a0becd YL |
490 | { |
491 | struct setup_data *data; | |
492 | u64 pa_data; | |
a0a0becd YL |
493 | |
494 | if (boot_params.hdr.version < 0x0209) | |
495 | return; | |
496 | pa_data = boot_params.hdr.setup_data; | |
497 | while (pa_data) { | |
88b4c146 | 498 | data = early_memremap(pa_data, sizeof(*data)); |
24aa0788 | 499 | memblock_reserve(pa_data, sizeof(*data) + data->len); |
a0a0becd YL |
500 | pa_data = data->next; |
501 | early_iounmap(data, sizeof(*data)); | |
502 | } | |
503 | } | |
504 | ||
ccb4defa YL |
505 | /* |
506 | * --------- Crashkernel reservation ------------------------------ | |
507 | */ | |
508 | ||
509 | #ifdef CONFIG_KEXEC | |
32105f7f | 510 | |
7f8595bf PA |
511 | /* |
512 | * Keep the crash kernel below this limit. On 32 bits earlier kernels | |
513 | * would limit the kernel to the low 512 MiB due to mapping restrictions. | |
514 | * On 64 bits, kexec-tools currently limits us to 896 MiB; increase this | |
515 | * limit once kexec-tools are fixed. | |
516 | */ | |
517 | #ifdef CONFIG_X86_32 | |
518 | # define CRASH_KERNEL_ADDR_MAX (512 << 20) | |
519 | #else | |
520 | # define CRASH_KERNEL_ADDR_MAX (896 << 20) | |
521 | #endif | |
522 | ||
29f784e3 | 523 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
524 | { |
525 | unsigned long long total_mem; | |
526 | unsigned long long crash_size, crash_base; | |
527 | int ret; | |
528 | ||
09c71bfd | 529 | total_mem = memblock_phys_mem_size(); |
ccb4defa YL |
530 | |
531 | ret = parse_crashkernel(boot_command_line, total_mem, | |
532 | &crash_size, &crash_base); | |
32105f7f BW |
533 | if (ret != 0 || crash_size <= 0) |
534 | return; | |
535 | ||
536 | /* 0 means: find the address automatically */ | |
537 | if (crash_base <= 0) { | |
44280733 YL |
538 | const unsigned long long alignment = 16<<20; /* 16M */ |
539 | ||
9f4c1396 | 540 | /* |
7f8595bf | 541 | * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX |
9f4c1396 YL |
542 | */ |
543 | crash_base = memblock_find_in_range(alignment, | |
7f8595bf | 544 | CRASH_KERNEL_ADDR_MAX, crash_size, alignment); |
9f4c1396 | 545 | |
1f5026a7 | 546 | if (!crash_base) { |
44280733 | 547 | pr_info("crashkernel reservation failed - No suitable area found.\n"); |
ccb4defa YL |
548 | return; |
549 | } | |
32105f7f | 550 | } else { |
44280733 YL |
551 | unsigned long long start; |
552 | ||
9f4c1396 YL |
553 | start = memblock_find_in_range(crash_base, |
554 | crash_base + crash_size, crash_size, 1<<20); | |
44280733 YL |
555 | if (start != crash_base) { |
556 | pr_info("crashkernel reservation failed - memory is in use.\n"); | |
ccb4defa YL |
557 | return; |
558 | } | |
32105f7f | 559 | } |
24aa0788 | 560 | memblock_reserve(crash_base, crash_size); |
ccb4defa | 561 | |
32105f7f BW |
562 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " |
563 | "for crashkernel (System RAM: %ldMB)\n", | |
564 | (unsigned long)(crash_size >> 20), | |
565 | (unsigned long)(crash_base >> 20), | |
566 | (unsigned long)(total_mem >> 20)); | |
ccb4defa | 567 | |
32105f7f BW |
568 | crashk_res.start = crash_base; |
569 | crashk_res.end = crash_base + crash_size - 1; | |
570 | insert_resource(&iomem_resource, &crashk_res); | |
ccb4defa YL |
571 | } |
572 | #else | |
29f784e3 | 573 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
574 | { |
575 | } | |
576 | #endif | |
577 | ||
bdba0e70 YL |
578 | static struct resource standard_io_resources[] = { |
579 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
580 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
581 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
582 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
583 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
584 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
585 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
586 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
587 | { .name = "keyboard", .start = 0x60, .end = 0x60, | |
588 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
589 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
590 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
591 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
592 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
593 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
594 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
595 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
596 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
597 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
598 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
599 | }; | |
600 | ||
8fee697d | 601 | void __init reserve_standard_io_resources(void) |
bdba0e70 YL |
602 | { |
603 | int i; | |
604 | ||
605 | /* request I/O space for devices used on all i[345]86 PCs */ | |
606 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
607 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
608 | ||
609 | } | |
610 | ||
042be38e YL |
611 | static __init void reserve_ibft_region(void) |
612 | { | |
613 | unsigned long addr, size = 0; | |
614 | ||
615 | addr = find_ibft_region(&size); | |
616 | ||
617 | if (size) | |
24aa0788 | 618 | memblock_reserve(addr, size); |
042be38e YL |
619 | } |
620 | ||
9ea77bdb | 621 | static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10; |
5649b7c3 | 622 | |
1b5576e6 YL |
623 | static void __init trim_bios_range(void) |
624 | { | |
625 | /* | |
626 | * A special case is the first 4Kb of memory; | |
627 | * This is a BIOS owned area, not kernel ram, but generally | |
628 | * not listed as such in the E820 table. | |
d0cd7425 PA |
629 | * |
630 | * This typically reserves additional memory (64KiB by default) | |
631 | * since some BIOSes are known to corrupt low memory. See the | |
9ea77bdb | 632 | * Kconfig help text for X86_RESERVE_LOW. |
1b5576e6 | 633 | */ |
9ea77bdb | 634 | e820_update_range(0, ALIGN(reserve_low, PAGE_SIZE), |
d0cd7425 PA |
635 | E820_RAM, E820_RESERVED); |
636 | ||
1b5576e6 YL |
637 | /* |
638 | * special case: Some BIOSen report the PC BIOS | |
639 | * area (640->1Mb) as ram even though it is not. | |
640 | * take them out. | |
641 | */ | |
642 | e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1); | |
643 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
644 | } | |
645 | ||
9ea77bdb PA |
646 | static int __init parse_reservelow(char *p) |
647 | { | |
648 | unsigned long long size; | |
649 | ||
650 | if (!p) | |
651 | return -EINVAL; | |
652 | ||
653 | size = memparse(p, &p); | |
654 | ||
655 | if (size < 4096) | |
656 | size = 4096; | |
657 | ||
658 | if (size > 640*1024) | |
659 | size = 640*1024; | |
660 | ||
661 | reserve_low = size; | |
662 | ||
663 | return 0; | |
664 | } | |
665 | ||
666 | early_param("reservelow", parse_reservelow); | |
667 | ||
1da177e4 LT |
668 | /* |
669 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
670 | * passed the efi memmap, systab, etc., so we should use these data structures | |
671 | * for initialization. Note, the efi init code path is determined by the | |
672 | * global efi_enabled. This allows the same kernel image to be used on existing | |
673 | * systems (with a traditional BIOS) as well as on EFI systems. | |
674 | */ | |
76934ed4 YL |
675 | /* |
676 | * setup_arch - architecture-specific boot-time initializations | |
677 | * | |
678 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
679 | */ | |
680 | ||
1da177e4 LT |
681 | void __init setup_arch(char **cmdline_p) |
682 | { | |
76934ed4 | 683 | #ifdef CONFIG_X86_32 |
1da177e4 | 684 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
3b33553b | 685 | visws_early_detect(); |
b40827fa BP |
686 | |
687 | /* | |
688 | * copy kernel address range established so far and switch | |
689 | * to the proper swapper page table | |
690 | */ | |
691 | clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY, | |
692 | initial_page_table + KERNEL_PGD_BOUNDARY, | |
693 | KERNEL_PGD_PTRS); | |
694 | ||
695 | load_cr3(swapper_pg_dir); | |
696 | __flush_tlb_all(); | |
76934ed4 YL |
697 | #else |
698 | printk(KERN_INFO "Command line: %s\n", boot_command_line); | |
699 | #endif | |
1da177e4 | 700 | |
9863c90f AK |
701 | /* |
702 | * If we have OLPC OFW, we might end up relocating the fixmap due to | |
703 | * reserve_top(), so do this before touching the ioremap area. | |
704 | */ | |
fd699c76 AS |
705 | olpc_ofw_detect(); |
706 | ||
29c84391 | 707 | early_trap_init(); |
9e882c92 | 708 | early_cpu_init(); |
1a98fd14 JF |
709 | early_ioremap_init(); |
710 | ||
fd699c76 AS |
711 | setup_olpc_ofw_pgd(); |
712 | ||
30c82645 PA |
713 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
714 | screen_info = boot_params.screen_info; | |
715 | edid_info = boot_params.edid_info; | |
76934ed4 | 716 | #ifdef CONFIG_X86_32 |
30c82645 PA |
717 | apm_info.bios = boot_params.apm_bios_info; |
718 | ist_info = boot_params.ist_info; | |
76934ed4 | 719 | if (boot_params.sys_desc_table.length != 0) { |
30c82645 PA |
720 | machine_id = boot_params.sys_desc_table.table[0]; |
721 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
722 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 723 | } |
76934ed4 YL |
724 | #endif |
725 | saved_video_mode = boot_params.hdr.vid_mode; | |
30c82645 | 726 | bootloader_type = boot_params.hdr.type_of_loader; |
5031296c PA |
727 | if ((bootloader_type >> 4) == 0xe) { |
728 | bootloader_type &= 0xf; | |
729 | bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; | |
730 | } | |
731 | bootloader_version = bootloader_type & 0xf; | |
732 | bootloader_version |= boot_params.hdr.ext_loader_ver << 4; | |
1da177e4 LT |
733 | |
734 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
735 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
736 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
737 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 738 | #endif |
7465252e YL |
739 | #ifdef CONFIG_EFI |
740 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
1adbfa35 | 741 | "EL32", 4)) { |
7465252e | 742 | efi_enabled = 1; |
1adbfa35 OJ |
743 | efi_64bit = false; |
744 | } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
745 | "EL64", 4)) { | |
746 | efi_enabled = 1; | |
747 | efi_64bit = true; | |
7465252e | 748 | } |
1adbfa35 OJ |
749 | if (efi_enabled && efi_memblock_x86_reserve_range()) |
750 | efi_enabled = 0; | |
7465252e YL |
751 | #endif |
752 | ||
42bbdb43 | 753 | x86_init.oem.arch_setup(); |
2215e69d | 754 | |
419afdf5 | 755 | iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; |
0dbfafa5 | 756 | setup_memory_map(); |
28bb2237 | 757 | parse_setup_data(); |
a0a0becd YL |
758 | /* update the e820_saved too */ |
759 | e820_reserve_setup_data(); | |
28bb2237 | 760 | |
1da177e4 LT |
761 | copy_edd(); |
762 | ||
30c82645 | 763 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
764 | root_mountflags &= ~MS_RDONLY; |
765 | init_mm.start_code = (unsigned long) _text; | |
766 | init_mm.end_code = (unsigned long) _etext; | |
767 | init_mm.end_data = (unsigned long) _edata; | |
93dbda7c | 768 | init_mm.brk = _brk_end; |
1da177e4 LT |
769 | |
770 | code_resource.start = virt_to_phys(_text); | |
771 | code_resource.end = virt_to_phys(_etext)-1; | |
772 | data_resource.start = virt_to_phys(_etext); | |
773 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
774 | bss_resource.start = virt_to_phys(&__bss_start); |
775 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 776 | |
516cbf37 TB |
777 | #ifdef CONFIG_CMDLINE_BOOL |
778 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
779 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
780 | #else | |
781 | if (builtin_cmdline[0]) { | |
782 | /* append boot loader cmdline to builtin */ | |
783 | strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); | |
784 | strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); | |
785 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
786 | } | |
787 | #endif | |
788 | #endif | |
789 | ||
eda6da92 YL |
790 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
791 | *cmdline_p = command_line; | |
792 | ||
eda6da92 | 793 | /* |
4b0f3b81 KC |
794 | * x86_configure_nx() is called before parse_early_param() to detect |
795 | * whether hardware doesn't support NX (so that the early EHCI debug | |
796 | * console setup can safely call set_fixmap()). It may then be called | |
797 | * again from within noexec_setup() during parsing early parameters | |
798 | * to honor the respective command line option. | |
eda6da92 | 799 | */ |
4763ed4d | 800 | x86_configure_nx(); |
eda6da92 YL |
801 | |
802 | parse_early_param(); | |
803 | ||
4b0f3b81 | 804 | x86_report_nx(); |
0ad5bce7 | 805 | |
28bb2237 | 806 | /* after early param, so could get panic from serial */ |
a9ce6bc1 | 807 | memblock_x86_reserve_range_setup_data(); |
28bb2237 | 808 | |
76934ed4 | 809 | if (acpi_mps_check()) { |
3eb11edc | 810 | #ifdef CONFIG_X86_LOCAL_APIC |
76934ed4 | 811 | disable_apic = 1; |
3eb11edc | 812 | #endif |
988781dc | 813 | setup_clear_cpu_cap(X86_FEATURE_APIC); |
3c999f14 YL |
814 | } |
815 | ||
dc7c65db LT |
816 | #ifdef CONFIG_PCI |
817 | if (pci_early_dump_regs) | |
818 | early_dump_pci_devices(); | |
819 | #endif | |
820 | ||
0dbfafa5 | 821 | finish_e820_parsing(); |
1a3f239d | 822 | |
ff0c0874 BM |
823 | if (efi_enabled) |
824 | efi_init(); | |
825 | ||
2216d199 YL |
826 | dmi_scan_machine(); |
827 | ||
88b094fb AK |
828 | /* |
829 | * VMware detection requires dmi to be available, so this | |
830 | * needs to be done after dmi_scan_machine, for the BP. | |
831 | */ | |
2d826404 | 832 | init_hypervisor_platform(); |
88b094fb | 833 | |
f7cf5a5b | 834 | x86_init.resources.probe_roms(); |
41c094fd YL |
835 | |
836 | /* after parse_early_param, so could debug it */ | |
837 | insert_resource(&iomem_resource, &code_resource); | |
838 | insert_resource(&iomem_resource, &data_resource); | |
839 | insert_resource(&iomem_resource, &bss_resource); | |
840 | ||
4eea6aa5 JS |
841 | /* |
842 | * Complain if .text .data and .bss are not marked as E820_RAM and | |
843 | * attempt to fix it by adding the range. We may have a confused BIOS, | |
844 | * or the user may have incorrectly supplied it via memmap=exactmap. If | |
845 | * we really are running on top non-RAM, we will crash later anyways. | |
846 | */ | |
847 | if (!e820_all_mapped(code_resource.start, __pa(__brk_limit), E820_RAM)) { | |
848 | pr_warn(".text .data .bss are not marked as E820_RAM!\n"); | |
849 | ||
850 | e820_add_region(code_resource.start, | |
851 | __pa(__brk_limit) - code_resource.start + 1, | |
852 | E820_RAM); | |
853 | } | |
854 | ||
1b5576e6 | 855 | trim_bios_range(); |
76934ed4 | 856 | #ifdef CONFIG_X86_32 |
cc9f7a0c YL |
857 | if (ppro_with_ram_bug()) { |
858 | e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, | |
859 | E820_RESERVED); | |
860 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
861 | printk(KERN_INFO "fixed physical RAM map:\n"); | |
862 | e820_print_map("bad_ppro"); | |
863 | } | |
76934ed4 YL |
864 | #else |
865 | early_gart_iommu_check(); | |
866 | #endif | |
cc9f7a0c | 867 | |
7b2a0a6c YL |
868 | /* |
869 | * partially used pages are not usable - thus | |
870 | * we are rounding upwards: | |
871 | */ | |
f361a450 | 872 | max_pfn = e820_end_of_ram_pfn(); |
7b2a0a6c | 873 | |
093af8d7 YL |
874 | /* update e820 for memory not covered by WB MTRRs */ |
875 | mtrr_bp_init(); | |
2dc807b3 | 876 | if (mtrr_trim_uncached_memory(max_pfn)) |
f361a450 | 877 | max_pfn = e820_end_of_ram_pfn(); |
76c32418 | 878 | |
76934ed4 | 879 | #ifdef CONFIG_X86_32 |
4e29684c | 880 | /* max_low_pfn get updated here */ |
2ec65f8b | 881 | find_low_pfn_range(); |
76934ed4 YL |
882 | #else |
883 | num_physpages = max_pfn; | |
884 | ||
06cd9a7d | 885 | check_x2apic(); |
76934ed4 YL |
886 | |
887 | /* How many end-of-memory variables you have, grandma! */ | |
888 | /* need this before calling reserve_initrd */ | |
f361a450 YL |
889 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
890 | max_low_pfn = e820_end_of_low_ram_pfn(); | |
891 | else | |
892 | max_low_pfn = max_pfn; | |
893 | ||
76934ed4 | 894 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
5394f80f JF |
895 | #endif |
896 | ||
893f38d1 YL |
897 | /* |
898 | * Find and reserve possible boot-time SMP configuration: | |
899 | */ | |
900 | find_smp_config(); | |
901 | ||
042be38e YL |
902 | reserve_ibft_region(); |
903 | ||
72d7c3b3 YL |
904 | /* |
905 | * Need to conclude brk, before memblock_x86_fill() | |
906 | * it could use memblock_find_in_range, could overlap with | |
907 | * brk area. | |
908 | */ | |
909 | reserve_brk(); | |
910 | ||
e5f15b45 YL |
911 | cleanup_highmap(); |
912 | ||
dd7dfad7 | 913 | memblock.current_limit = ISA_END_ADDRESS; |
72d7c3b3 YL |
914 | memblock_x86_fill(); |
915 | ||
916f676f MG |
916 | /* |
917 | * The EFI specification says that boot service code won't be called | |
918 | * after ExitBootServices(). This is, in fact, a lie. | |
919 | */ | |
920 | if (efi_enabled) | |
921 | efi_reserve_boot_services(); | |
922 | ||
72d7c3b3 YL |
923 | /* preallocate 4k for mptable mpc */ |
924 | early_reserve_e820_mpc_new(); | |
925 | ||
926 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION | |
927 | setup_bios_corruption_check(); | |
928 | #endif | |
929 | ||
365811d6 BH |
930 | printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n", |
931 | (max_pfn_mapped<<PAGE_SHIFT) - 1); | |
72d7c3b3 | 932 | |
084ee1c6 | 933 | setup_real_mode(); |
893f38d1 | 934 | |
854c879f PE |
935 | init_gbpages(); |
936 | ||
22ddfcaa | 937 | init_mem_mapping(); |
f361a450 | 938 | |
72d7c3b3 | 939 | memblock.current_limit = get_max_mapped(); |
0a2b9a6e | 940 | dma_contiguous_reserve(0); |
4e29684c | 941 | |
e7b37895 YL |
942 | /* |
943 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
944 | */ | |
945 | ||
946 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
947 | if (init_ohci1394_dma_early) | |
948 | init_ohci1394_dma_on_all_controllers(); | |
949 | #endif | |
162a7e75 MT |
950 | /* Allocate bigger log buffer */ |
951 | setup_log_buf(1); | |
e7b37895 | 952 | |
2ec65f8b YL |
953 | reserve_initrd(); |
954 | ||
44280733 YL |
955 | reserve_crashkernel(); |
956 | ||
76934ed4 | 957 | vsmp_init(); |
76934ed4 | 958 | |
1c6e5503 YL |
959 | io_delay_init(); |
960 | ||
1c6e5503 YL |
961 | /* |
962 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
963 | */ | |
964 | acpi_boot_table_init(); | |
1c6e5503 | 965 | |
2e42060c JS |
966 | early_acpi_boot_init(); |
967 | ||
d8fc3afc | 968 | initmem_init(); |
6f2a7536 | 969 | memblock_find_dma_reserve(); |
91467bdf | 970 | |
90993cdd | 971 | #ifdef CONFIG_KVM_GUEST |
790c73f6 GOC |
972 | kvmclock_init(); |
973 | #endif | |
974 | ||
7737b215 | 975 | x86_init.paging.pagetable_init(); |
f212ec4b | 976 | |
4da9484b PA |
977 | if (boot_cpu_data.cpuid_level >= 0) { |
978 | /* A CPU has %cr4 if and only if it has CPUID */ | |
979 | mmu_cr4_features = read_cr4(); | |
cda846f1 JS |
980 | if (trampoline_cr4_features) |
981 | *trampoline_cr4_features = mmu_cr4_features; | |
4da9484b PA |
982 | } |
983 | ||
b40827fa BP |
984 | #ifdef CONFIG_X86_32 |
985 | /* sync back kernel address range */ | |
986 | clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, | |
987 | swapper_pg_dir + KERNEL_PGD_BOUNDARY, | |
988 | KERNEL_PGD_PTRS); | |
989 | #endif | |
fd89a137 | 990 | |
31625340 JC |
991 | tboot_probe(); |
992 | ||
76934ed4 YL |
993 | #ifdef CONFIG_X86_64 |
994 | map_vsyscall(); | |
995 | #endif | |
996 | ||
1a3f239d | 997 | generic_apic_probe(); |
1da177e4 | 998 | |
54ef3400 | 999 | early_quirks(); |
d44647b0 | 1000 | |
295deae4 YL |
1001 | /* |
1002 | * Read APIC and some other early information from ACPI tables. | |
1003 | */ | |
1da177e4 | 1004 | acpi_boot_init(); |
efafc8b2 | 1005 | sfi_init(); |
a906fdaa | 1006 | x86_dtb_init(); |
04606618 | 1007 | |
295deae4 YL |
1008 | /* |
1009 | * get boot-time SMP configuration: | |
1010 | */ | |
e0da3364 YL |
1011 | if (smp_found_config) |
1012 | get_smp_config(); | |
76934ed4 | 1013 | |
329513a3 | 1014 | prefill_possible_map(); |
301e6190 | 1015 | |
5f4765f9 | 1016 | init_cpu_to_node(); |
5f4765f9 | 1017 | |
76934ed4 | 1018 | init_apic_mappings(); |
9438ef7f IM |
1019 | if (x86_io_apic_ops.init) |
1020 | x86_io_apic_ops.init(); | |
9d6a4d08 | 1021 | |
295deae4 | 1022 | kvm_guest_init(); |
1da177e4 | 1023 | |
41c094fd | 1024 | e820_reserve_resources(); |
bf62f398 | 1025 | e820_mark_nosave_regions(max_low_pfn); |
1da177e4 | 1026 | |
8fee697d | 1027 | x86_init.resources.reserve_resources(); |
41c094fd YL |
1028 | |
1029 | e820_setup_gap(); | |
1030 | ||
1da177e4 LT |
1031 | #ifdef CONFIG_VT |
1032 | #if defined(CONFIG_VGA_CONSOLE) | |
1033 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
1034 | conswitchp = &vga_con; | |
1035 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
1036 | conswitchp = &dummy_con; | |
1037 | #endif | |
1038 | #endif | |
6f30c1ac | 1039 | x86_init.oem.banner(); |
a2202aa2 | 1040 | |
6b617e22 FT |
1041 | x86_init.timers.wallclock_init(); |
1042 | ||
a2202aa2 | 1043 | mcheck_init(); |
f49aa448 | 1044 | |
dc326fca | 1045 | arch_init_ideal_nops(); |
b3c869d3 JS |
1046 | |
1047 | register_refined_jiffies(CLOCK_TICK_RATE); | |
5189c2a7 OJ |
1048 | |
1049 | #ifdef CONFIG_EFI | |
1050 | /* Once setup is done above, disable efi_enabled on mismatched | |
1051 | * firmware/kernel archtectures since there is no support for | |
1052 | * runtime services. | |
1053 | */ | |
1054 | if (efi_enabled && IS_ENABLED(CONFIG_X86_64) != efi_64bit) { | |
1055 | pr_info("efi: Setup done, disabling due to 32/64-bit mismatch\n"); | |
1056 | efi_unmap_memmap(); | |
1057 | efi_enabled = 0; | |
1058 | } | |
1059 | #endif | |
1da177e4 | 1060 | } |
5649b7c3 | 1061 | |
9be1b56a IM |
1062 | #ifdef CONFIG_X86_32 |
1063 | ||
8fee697d TG |
1064 | static struct resource video_ram_resource = { |
1065 | .name = "Video RAM area", | |
1066 | .start = 0xa0000, | |
1067 | .end = 0xbffff, | |
1068 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
9be1b56a IM |
1069 | }; |
1070 | ||
8fee697d | 1071 | void __init i386_reserve_resources(void) |
9be1b56a | 1072 | { |
8fee697d TG |
1073 | request_resource(&iomem_resource, &video_ram_resource); |
1074 | reserve_standard_io_resources(); | |
9be1b56a IM |
1075 | } |
1076 | ||
9be1b56a | 1077 | #endif /* CONFIG_X86_32 */ |