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 LT |
84 | #include <asm/sections.h> |
85 | #include <asm/io_apic.h> | |
86 | #include <asm/ist.h> | |
1164dd00 | 87 | #include <asm/setup_arch.h> |
ce3fe6b2 | 88 | #include <asm/bios_ebda.h> |
00bf4098 | 89 | #include <asm/cacheflush.h> |
2fde61fd | 90 | #include <asm/processor.h> |
cc9f7a0c | 91 | #include <asm/bugs.h> |
1da177e4 | 92 | |
46d671b5 | 93 | #include <asm/vsyscall.h> |
6e5385d4 | 94 | #include <asm/cpu.h> |
46d671b5 YL |
95 | #include <asm/desc.h> |
96 | #include <asm/dma.h> | |
46a7fa27 | 97 | #include <asm/iommu.h> |
1d9b16d1 | 98 | #include <asm/gart.h> |
46d671b5 YL |
99 | #include <asm/mmu_context.h> |
100 | #include <asm/proto.h> | |
101 | ||
46d671b5 | 102 | #include <asm/paravirt.h> |
88b094fb | 103 | #include <asm/hypervisor.h> |
fd699c76 | 104 | #include <asm/olpc_ofw.h> |
46d671b5 YL |
105 | |
106 | #include <asm/percpu.h> | |
46d671b5 YL |
107 | #include <asm/topology.h> |
108 | #include <asm/apicdef.h> | |
23ac4ae8 | 109 | #include <asm/amd_nb.h> |
a2202aa2 | 110 | #include <asm/mce.h> |
f49aa448 | 111 | #include <asm/alternative.h> |
da6b737b | 112 | #include <asm/prom.h> |
46d671b5 | 113 | |
2b72394e | 114 | /* |
66520ebc JS |
115 | * max_low_pfn_mapped: highest direct mapped pfn under 4GB |
116 | * max_pfn_mapped: highest direct mapped pfn over 4GB | |
117 | * | |
118 | * The direct mapping only covers E820_RAM regions, so the ranges and gaps are | |
119 | * represented by pfn_mapped | |
2b72394e PE |
120 | */ |
121 | unsigned long max_low_pfn_mapped; | |
122 | unsigned long max_pfn_mapped; | |
123 | ||
e808bae2 | 124 | #ifdef CONFIG_DMI |
796216a5 | 125 | RESERVE_BRK(dmi_alloc, 65536); |
e808bae2 | 126 | #endif |
796216a5 | 127 | |
c0b5842a | 128 | |
93dbda7c JF |
129 | static __initdata unsigned long _brk_start = (unsigned long)__brk_base; |
130 | unsigned long _brk_end = (unsigned long)__brk_base; | |
131 | ||
c0b5842a IM |
132 | #ifdef CONFIG_X86_64 |
133 | int default_cpu_present_to_apicid(int mps_cpu) | |
134 | { | |
135 | return __default_cpu_present_to_apicid(mps_cpu); | |
136 | } | |
137 | ||
e11dadab | 138 | int default_check_phys_apicid_present(int phys_apicid) |
c0b5842a | 139 | { |
e11dadab | 140 | return __default_check_phys_apicid_present(phys_apicid); |
c0b5842a IM |
141 | } |
142 | #endif | |
143 | ||
217b8ce8 | 144 | struct boot_params boot_params; |
217b8ce8 | 145 | |
1da177e4 LT |
146 | /* |
147 | * Machine setup.. | |
148 | */ | |
c9cce83d BW |
149 | static struct resource data_resource = { |
150 | .name = "Kernel data", | |
151 | .start = 0, | |
152 | .end = 0, | |
153 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
154 | }; | |
155 | ||
156 | static struct resource code_resource = { | |
157 | .name = "Kernel code", | |
158 | .start = 0, | |
159 | .end = 0, | |
160 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
161 | }; | |
162 | ||
163 | static struct resource bss_resource = { | |
164 | .name = "Kernel bss", | |
165 | .start = 0, | |
166 | .end = 0, | |
167 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
168 | }; | |
169 | ||
7dea23ec YL |
170 | |
171 | #ifdef CONFIG_X86_32 | |
1da177e4 | 172 | /* cpu data as detected by the assembly code in head.S */ |
148f9bb8 | 173 | struct cpuinfo_x86 new_cpu_data = { |
015221fe | 174 | .wp_works_ok = -1, |
015221fe | 175 | }; |
1da177e4 | 176 | /* common cpu data for all cpus */ |
015221fe KM |
177 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { |
178 | .wp_works_ok = -1, | |
015221fe | 179 | }; |
129f6946 | 180 | EXPORT_SYMBOL(boot_cpu_data); |
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 | */ | |
9eaa192d | 248 | static inline void __init copy_edd(void) |
1da177e4 | 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 | |
9eaa192d | 257 | static inline void __init copy_edd(void) |
1da177e4 LT |
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 | ||
148b2098 | 281 | #ifdef CONFIG_X86_32 |
e5f15b45 | 282 | static void __init cleanup_highmap(void) |
f005fe12 YL |
283 | { |
284 | } | |
854c879f PE |
285 | #endif |
286 | ||
5368a2be PA |
287 | static void __init reserve_brk(void) |
288 | { | |
289 | if (_brk_end > _brk_start) | |
fc8d7826 AD |
290 | memblock_reserve(__pa_symbol(_brk_start), |
291 | _brk_end - _brk_start); | |
5368a2be PA |
292 | |
293 | /* Mark brk area as locked down and no longer taking any | |
294 | new allocations */ | |
295 | _brk_start = 0; | |
296 | } | |
297 | ||
cf8fa920 PA |
298 | #ifdef CONFIG_BLK_DEV_INITRD |
299 | ||
a8a51a88 YL |
300 | static u64 __init get_ramdisk_image(void) |
301 | { | |
302 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; | |
303 | ||
ee92d815 YL |
304 | ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32; |
305 | ||
a8a51a88 YL |
306 | return ramdisk_image; |
307 | } | |
308 | static u64 __init get_ramdisk_size(void) | |
309 | { | |
310 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
311 | ||
ee92d815 YL |
312 | ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32; |
313 | ||
a8a51a88 YL |
314 | return ramdisk_size; |
315 | } | |
316 | ||
eb1379cb YL |
317 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) |
318 | static void __init relocate_initrd(void) | |
cf8fa920 | 319 | { |
c967da6a | 320 | /* Assume only end is not page aligned */ |
a8a51a88 YL |
321 | u64 ramdisk_image = get_ramdisk_image(); |
322 | u64 ramdisk_size = get_ramdisk_size(); | |
c967da6a | 323 | u64 area_size = PAGE_ALIGN(ramdisk_size); |
ba5b14cc | 324 | u64 ramdisk_here; |
eb1379cb YL |
325 | unsigned long slop, clen, mapaddr; |
326 | char *p, *q; | |
cf8fa920 | 327 | |
e8c57d40 | 328 | /* We need to move the initrd down into directly mapped mem */ |
74f27655 | 329 | ramdisk_here = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped), |
e8c57d40 | 330 | area_size, PAGE_SIZE); |
cf8fa920 | 331 | |
1f5026a7 | 332 | if (!ramdisk_here) |
3945e2c9 YL |
333 | panic("Cannot find place for new RAMDISK of size %lld\n", |
334 | ramdisk_size); | |
335 | ||
e8c57d40 | 336 | /* Note: this includes all the mem currently occupied by |
cf8fa920 | 337 | the initrd, we rely on that fact to keep the data intact. */ |
24aa0788 | 338 | memblock_reserve(ramdisk_here, area_size); |
cf8fa920 PA |
339 | initrd_start = ramdisk_here + PAGE_OFFSET; |
340 | initrd_end = initrd_start + ramdisk_size; | |
365811d6 BH |
341 | printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n", |
342 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
cf8fa920 | 343 | |
cf8fa920 PA |
344 | q = (char *)initrd_start; |
345 | ||
e8c57d40 | 346 | /* Copy the initrd */ |
cf8fa920 PA |
347 | while (ramdisk_size) { |
348 | slop = ramdisk_image & ~PAGE_MASK; | |
349 | clen = ramdisk_size; | |
350 | if (clen > MAX_MAP_CHUNK-slop) | |
351 | clen = MAX_MAP_CHUNK-slop; | |
352 | mapaddr = ramdisk_image & PAGE_MASK; | |
88b4c146 | 353 | p = early_memremap(mapaddr, clen+slop); |
cf8fa920 | 354 | memcpy(q, p+slop, clen); |
beacfaac | 355 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
356 | q += clen; |
357 | ramdisk_image += clen; | |
358 | ramdisk_size -= clen; | |
359 | } | |
e8c57d40 | 360 | |
a8a51a88 YL |
361 | ramdisk_image = get_ramdisk_image(); |
362 | ramdisk_size = get_ramdisk_size(); | |
365811d6 BH |
363 | printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to" |
364 | " [mem %#010llx-%#010llx]\n", | |
ba5b14cc YL |
365 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
366 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
eb1379cb | 367 | } |
9a27f5c5 | 368 | |
1b8c78be YL |
369 | static void __init early_reserve_initrd(void) |
370 | { | |
371 | /* Assume only end is not page aligned */ | |
a8a51a88 YL |
372 | u64 ramdisk_image = get_ramdisk_image(); |
373 | u64 ramdisk_size = get_ramdisk_size(); | |
1b8c78be YL |
374 | u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
375 | ||
376 | if (!boot_params.hdr.type_of_loader || | |
377 | !ramdisk_image || !ramdisk_size) | |
378 | return; /* No initrd provided by bootloader */ | |
379 | ||
380 | memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image); | |
381 | } | |
eb1379cb YL |
382 | static void __init reserve_initrd(void) |
383 | { | |
c967da6a | 384 | /* Assume only end is not page aligned */ |
a8a51a88 YL |
385 | u64 ramdisk_image = get_ramdisk_image(); |
386 | u64 ramdisk_size = get_ramdisk_size(); | |
c967da6a | 387 | u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
e8c57d40 | 388 | u64 mapped_size; |
eb1379cb YL |
389 | |
390 | if (!boot_params.hdr.type_of_loader || | |
391 | !ramdisk_image || !ramdisk_size) | |
392 | return; /* No initrd provided by bootloader */ | |
393 | ||
394 | initrd_start = 0; | |
395 | ||
595ad9af | 396 | mapped_size = memblock_mem_size(max_pfn_mapped); |
e8c57d40 | 397 | if (ramdisk_size >= (mapped_size>>1)) |
ab7b64e9 PJ |
398 | panic("initrd too large to handle, " |
399 | "disabling initrd (%lld needed, %lld available)\n", | |
e8c57d40 | 400 | ramdisk_size, mapped_size>>1); |
eb1379cb | 401 | |
365811d6 BH |
402 | printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image, |
403 | ramdisk_end - 1); | |
eb1379cb | 404 | |
74f27655 | 405 | if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image), |
e8c57d40 YL |
406 | PFN_DOWN(ramdisk_end))) { |
407 | /* All are mapped, easy case */ | |
eb1379cb YL |
408 | initrd_start = ramdisk_image + PAGE_OFFSET; |
409 | initrd_end = initrd_start + ramdisk_size; | |
410 | return; | |
411 | } | |
412 | ||
eb1379cb | 413 | relocate_initrd(); |
8c5dd8f4 | 414 | |
24aa0788 | 415 | memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); |
cf8fa920 | 416 | } |
225c37d7 | 417 | #else |
1b8c78be YL |
418 | static void __init early_reserve_initrd(void) |
419 | { | |
420 | } | |
eb1379cb | 421 | static void __init reserve_initrd(void) |
225c37d7 YL |
422 | { |
423 | } | |
cf8fa920 PA |
424 | #endif /* CONFIG_BLK_DEV_INITRD */ |
425 | ||
29f784e3 | 426 | static void __init parse_setup_data(void) |
257b0fde YL |
427 | { |
428 | struct setup_data *data; | |
429 | u64 pa_data; | |
430 | ||
257b0fde YL |
431 | pa_data = boot_params.hdr.setup_data; |
432 | while (pa_data) { | |
f1c2b357 SAS |
433 | u32 data_len, map_len; |
434 | ||
435 | map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK), | |
436 | (u64)sizeof(struct setup_data)); | |
437 | data = early_memremap(pa_data, map_len); | |
438 | data_len = data->len + sizeof(struct setup_data); | |
439 | if (data_len > map_len) { | |
440 | early_iounmap(data, map_len); | |
441 | data = early_memremap(pa_data, data_len); | |
442 | map_len = data_len; | |
443 | } | |
444 | ||
257b0fde YL |
445 | switch (data->type) { |
446 | case SETUP_E820_EXT: | |
f1c2b357 | 447 | parse_e820_ext(data); |
257b0fde | 448 | break; |
da6b737b SAS |
449 | case SETUP_DTB: |
450 | add_dtb(pa_data); | |
257b0fde YL |
451 | break; |
452 | default: | |
453 | break; | |
454 | } | |
257b0fde | 455 | pa_data = data->next; |
f1c2b357 | 456 | early_iounmap(data, map_len); |
257b0fde YL |
457 | } |
458 | } | |
459 | ||
a0a0becd | 460 | static void __init e820_reserve_setup_data(void) |
28bb2237 YL |
461 | { |
462 | struct setup_data *data; | |
463 | u64 pa_data; | |
d9a81b44 | 464 | int found = 0; |
28bb2237 | 465 | |
28bb2237 YL |
466 | pa_data = boot_params.hdr.setup_data; |
467 | while (pa_data) { | |
88b4c146 | 468 | data = early_memremap(pa_data, sizeof(*data)); |
28bb2237 YL |
469 | e820_update_range(pa_data, sizeof(*data)+data->len, |
470 | E820_RAM, E820_RESERVED_KERN); | |
d9a81b44 | 471 | found = 1; |
28bb2237 YL |
472 | pa_data = data->next; |
473 | early_iounmap(data, sizeof(*data)); | |
474 | } | |
d9a81b44 YL |
475 | if (!found) |
476 | return; | |
477 | ||
28bb2237 | 478 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
a0a0becd | 479 | memcpy(&e820_saved, &e820, sizeof(struct e820map)); |
28bb2237 YL |
480 | printk(KERN_INFO "extended physical RAM map:\n"); |
481 | e820_print_map("reserve setup_data"); | |
482 | } | |
483 | ||
a9ce6bc1 | 484 | static void __init memblock_x86_reserve_range_setup_data(void) |
a0a0becd YL |
485 | { |
486 | struct setup_data *data; | |
487 | u64 pa_data; | |
a0a0becd | 488 | |
a0a0becd YL |
489 | pa_data = boot_params.hdr.setup_data; |
490 | while (pa_data) { | |
88b4c146 | 491 | data = early_memremap(pa_data, sizeof(*data)); |
24aa0788 | 492 | memblock_reserve(pa_data, sizeof(*data) + data->len); |
a0a0becd YL |
493 | pa_data = data->next; |
494 | early_iounmap(data, sizeof(*data)); | |
495 | } | |
496 | } | |
497 | ||
ccb4defa YL |
498 | /* |
499 | * --------- Crashkernel reservation ------------------------------ | |
500 | */ | |
501 | ||
502 | #ifdef CONFIG_KEXEC | |
32105f7f | 503 | |
7f8595bf PA |
504 | /* |
505 | * Keep the crash kernel below this limit. On 32 bits earlier kernels | |
506 | * would limit the kernel to the low 512 MiB due to mapping restrictions. | |
55a20ee7 | 507 | * On 64bit, old kexec-tools need to under 896MiB. |
7f8595bf PA |
508 | */ |
509 | #ifdef CONFIG_X86_32 | |
55a20ee7 YL |
510 | # define CRASH_KERNEL_ADDR_LOW_MAX (512 << 20) |
511 | # define CRASH_KERNEL_ADDR_HIGH_MAX (512 << 20) | |
7f8595bf | 512 | #else |
55a20ee7 YL |
513 | # define CRASH_KERNEL_ADDR_LOW_MAX (896UL<<20) |
514 | # define CRASH_KERNEL_ADDR_HIGH_MAX MAXMEM | |
7f8595bf PA |
515 | #endif |
516 | ||
0212f915 YL |
517 | static void __init reserve_crashkernel_low(void) |
518 | { | |
519 | #ifdef CONFIG_X86_64 | |
520 | const unsigned long long alignment = 16<<20; /* 16M */ | |
521 | unsigned long long low_base = 0, low_size = 0; | |
522 | unsigned long total_low_mem; | |
523 | unsigned long long base; | |
c729de8f | 524 | bool auto_set = false; |
0212f915 YL |
525 | int ret; |
526 | ||
527 | total_low_mem = memblock_mem_size(1UL<<(32-PAGE_SHIFT)); | |
adbc742b | 528 | /* crashkernel=Y,low */ |
0212f915 YL |
529 | ret = parse_crashkernel_low(boot_command_line, total_low_mem, |
530 | &low_size, &base); | |
c729de8f YL |
531 | if (ret != 0) { |
532 | /* | |
533 | * two parts from lib/swiotlb.c: | |
534 | * swiotlb size: user specified with swiotlb= or default. | |
535 | * swiotlb overflow buffer: now is hardcoded to 32k. | |
536 | * We round it to 8M for other buffers that | |
537 | * may need to stay low too. | |
538 | */ | |
539 | low_size = swiotlb_size_or_default() + (8UL<<20); | |
540 | auto_set = true; | |
541 | } else { | |
adbc742b | 542 | /* passed with crashkernel=0,low ? */ |
c729de8f YL |
543 | if (!low_size) |
544 | return; | |
545 | } | |
0212f915 YL |
546 | |
547 | low_base = memblock_find_in_range(low_size, (1ULL<<32), | |
548 | low_size, alignment); | |
549 | ||
550 | if (!low_base) { | |
c729de8f YL |
551 | if (!auto_set) |
552 | pr_info("crashkernel low reservation failed - No suitable area found.\n"); | |
0212f915 YL |
553 | |
554 | return; | |
555 | } | |
556 | ||
557 | memblock_reserve(low_base, low_size); | |
558 | pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n", | |
559 | (unsigned long)(low_size >> 20), | |
560 | (unsigned long)(low_base >> 20), | |
561 | (unsigned long)(total_low_mem >> 20)); | |
562 | crashk_low_res.start = low_base; | |
563 | crashk_low_res.end = low_base + low_size - 1; | |
564 | insert_resource(&iomem_resource, &crashk_low_res); | |
7f8595bf | 565 | #endif |
0212f915 | 566 | } |
7f8595bf | 567 | |
29f784e3 | 568 | static void __init reserve_crashkernel(void) |
ccb4defa | 569 | { |
0212f915 | 570 | const unsigned long long alignment = 16<<20; /* 16M */ |
ccb4defa YL |
571 | unsigned long long total_mem; |
572 | unsigned long long crash_size, crash_base; | |
55a20ee7 | 573 | bool high = false; |
ccb4defa YL |
574 | int ret; |
575 | ||
09c71bfd | 576 | total_mem = memblock_phys_mem_size(); |
ccb4defa | 577 | |
55a20ee7 | 578 | /* crashkernel=XM */ |
ccb4defa YL |
579 | ret = parse_crashkernel(boot_command_line, total_mem, |
580 | &crash_size, &crash_base); | |
55a20ee7 | 581 | if (ret != 0 || crash_size <= 0) { |
adbc742b | 582 | /* crashkernel=X,high */ |
55a20ee7 YL |
583 | ret = parse_crashkernel_high(boot_command_line, total_mem, |
584 | &crash_size, &crash_base); | |
585 | if (ret != 0 || crash_size <= 0) | |
586 | return; | |
587 | high = true; | |
588 | } | |
32105f7f BW |
589 | |
590 | /* 0 means: find the address automatically */ | |
591 | if (crash_base <= 0) { | |
9f4c1396 | 592 | /* |
7f8595bf | 593 | * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX |
9f4c1396 YL |
594 | */ |
595 | crash_base = memblock_find_in_range(alignment, | |
55a20ee7 YL |
596 | high ? CRASH_KERNEL_ADDR_HIGH_MAX : |
597 | CRASH_KERNEL_ADDR_LOW_MAX, | |
598 | crash_size, alignment); | |
9f4c1396 | 599 | |
1f5026a7 | 600 | if (!crash_base) { |
44280733 | 601 | pr_info("crashkernel reservation failed - No suitable area found.\n"); |
ccb4defa YL |
602 | return; |
603 | } | |
0212f915 | 604 | |
32105f7f | 605 | } else { |
44280733 YL |
606 | unsigned long long start; |
607 | ||
9f4c1396 YL |
608 | start = memblock_find_in_range(crash_base, |
609 | crash_base + crash_size, crash_size, 1<<20); | |
44280733 YL |
610 | if (start != crash_base) { |
611 | pr_info("crashkernel reservation failed - memory is in use.\n"); | |
ccb4defa YL |
612 | return; |
613 | } | |
32105f7f | 614 | } |
24aa0788 | 615 | memblock_reserve(crash_base, crash_size); |
ccb4defa | 616 | |
32105f7f BW |
617 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " |
618 | "for crashkernel (System RAM: %ldMB)\n", | |
619 | (unsigned long)(crash_size >> 20), | |
620 | (unsigned long)(crash_base >> 20), | |
621 | (unsigned long)(total_mem >> 20)); | |
ccb4defa | 622 | |
32105f7f BW |
623 | crashk_res.start = crash_base; |
624 | crashk_res.end = crash_base + crash_size - 1; | |
625 | insert_resource(&iomem_resource, &crashk_res); | |
0212f915 YL |
626 | |
627 | if (crash_base >= (1ULL<<32)) | |
628 | reserve_crashkernel_low(); | |
ccb4defa YL |
629 | } |
630 | #else | |
29f784e3 | 631 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
632 | { |
633 | } | |
634 | #endif | |
635 | ||
bdba0e70 YL |
636 | static struct resource standard_io_resources[] = { |
637 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
638 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
639 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
640 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
641 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
642 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
643 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
644 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
645 | { .name = "keyboard", .start = 0x60, .end = 0x60, | |
646 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
647 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
648 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
649 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
650 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
651 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
652 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
653 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
654 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
655 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
656 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
657 | }; | |
658 | ||
8fee697d | 659 | void __init reserve_standard_io_resources(void) |
bdba0e70 YL |
660 | { |
661 | int i; | |
662 | ||
663 | /* request I/O space for devices used on all i[345]86 PCs */ | |
664 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
665 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
666 | ||
667 | } | |
668 | ||
042be38e YL |
669 | static __init void reserve_ibft_region(void) |
670 | { | |
671 | unsigned long addr, size = 0; | |
672 | ||
673 | addr = find_ibft_region(&size); | |
674 | ||
675 | if (size) | |
24aa0788 | 676 | memblock_reserve(addr, size); |
042be38e YL |
677 | } |
678 | ||
a9acc536 JB |
679 | static bool __init snb_gfx_workaround_needed(void) |
680 | { | |
e43b3cec | 681 | #ifdef CONFIG_PCI |
a9acc536 JB |
682 | int i; |
683 | u16 vendor, devid; | |
ab3cd867 | 684 | static const __initconst u16 snb_ids[] = { |
a9acc536 JB |
685 | 0x0102, |
686 | 0x0112, | |
687 | 0x0122, | |
688 | 0x0106, | |
689 | 0x0116, | |
690 | 0x0126, | |
691 | 0x010a, | |
692 | }; | |
693 | ||
694 | /* Assume no if something weird is going on with PCI */ | |
695 | if (!early_pci_allowed()) | |
696 | return false; | |
697 | ||
698 | vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID); | |
699 | if (vendor != 0x8086) | |
700 | return false; | |
701 | ||
702 | devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID); | |
703 | for (i = 0; i < ARRAY_SIZE(snb_ids); i++) | |
704 | if (devid == snb_ids[i]) | |
705 | return true; | |
e43b3cec | 706 | #endif |
a9acc536 JB |
707 | |
708 | return false; | |
709 | } | |
710 | ||
711 | /* | |
712 | * Sandy Bridge graphics has trouble with certain ranges, exclude | |
713 | * them from allocation. | |
714 | */ | |
715 | static void __init trim_snb_memory(void) | |
716 | { | |
ab3cd867 | 717 | static const __initconst unsigned long bad_pages[] = { |
a9acc536 JB |
718 | 0x20050000, |
719 | 0x20110000, | |
720 | 0x20130000, | |
721 | 0x20138000, | |
722 | 0x40004000, | |
723 | }; | |
724 | int i; | |
725 | ||
726 | if (!snb_gfx_workaround_needed()) | |
727 | return; | |
728 | ||
729 | printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n"); | |
730 | ||
731 | /* | |
732 | * Reserve all memory below the 1 MB mark that has not | |
733 | * already been reserved. | |
734 | */ | |
735 | memblock_reserve(0, 1<<20); | |
736 | ||
737 | for (i = 0; i < ARRAY_SIZE(bad_pages); i++) { | |
738 | if (memblock_reserve(bad_pages[i], PAGE_SIZE)) | |
739 | printk(KERN_WARNING "failed to reserve 0x%08lx\n", | |
740 | bad_pages[i]); | |
741 | } | |
742 | } | |
743 | ||
744 | /* | |
745 | * Here we put platform-specific memory range workarounds, i.e. | |
746 | * memory known to be corrupt or otherwise in need to be reserved on | |
747 | * specific platforms. | |
748 | * | |
749 | * If this gets used more widely it could use a real dispatch mechanism. | |
750 | */ | |
751 | static void __init trim_platform_memory_ranges(void) | |
752 | { | |
753 | trim_snb_memory(); | |
754 | } | |
755 | ||
1b5576e6 YL |
756 | static void __init trim_bios_range(void) |
757 | { | |
758 | /* | |
759 | * A special case is the first 4Kb of memory; | |
760 | * This is a BIOS owned area, not kernel ram, but generally | |
761 | * not listed as such in the E820 table. | |
d0cd7425 PA |
762 | * |
763 | * This typically reserves additional memory (64KiB by default) | |
764 | * since some BIOSes are known to corrupt low memory. See the | |
9ea77bdb | 765 | * Kconfig help text for X86_RESERVE_LOW. |
1b5576e6 | 766 | */ |
95c96084 | 767 | e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED); |
d0cd7425 | 768 | |
1b5576e6 YL |
769 | /* |
770 | * special case: Some BIOSen report the PC BIOS | |
771 | * area (640->1Mb) as ram even though it is not. | |
772 | * take them out. | |
773 | */ | |
774 | e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1); | |
a9acc536 | 775 | |
1b5576e6 YL |
776 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
777 | } | |
778 | ||
b422a309 YL |
779 | /* called before trim_bios_range() to spare extra sanitize */ |
780 | static void __init e820_add_kernel_range(void) | |
781 | { | |
782 | u64 start = __pa_symbol(_text); | |
783 | u64 size = __pa_symbol(_end) - start; | |
784 | ||
785 | /* | |
786 | * Complain if .text .data and .bss are not marked as E820_RAM and | |
787 | * attempt to fix it by adding the range. We may have a confused BIOS, | |
788 | * or the user may have used memmap=exactmap or memmap=xxM$yyM to | |
789 | * exclude kernel range. If we really are running on top non-RAM, | |
790 | * we will crash later anyways. | |
791 | */ | |
792 | if (e820_all_mapped(start, start + size, E820_RAM)) | |
793 | return; | |
794 | ||
795 | pr_warn(".text .data .bss are not marked as E820_RAM!\n"); | |
796 | e820_remove_range(start, size, E820_RAM, 0); | |
797 | e820_add_region(start, size, E820_RAM); | |
798 | } | |
799 | ||
95c96084 PA |
800 | static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10; |
801 | ||
9ea77bdb PA |
802 | static int __init parse_reservelow(char *p) |
803 | { | |
804 | unsigned long long size; | |
805 | ||
806 | if (!p) | |
807 | return -EINVAL; | |
808 | ||
809 | size = memparse(p, &p); | |
810 | ||
811 | if (size < 4096) | |
812 | size = 4096; | |
813 | ||
814 | if (size > 640*1024) | |
815 | size = 640*1024; | |
816 | ||
817 | reserve_low = size; | |
818 | ||
819 | return 0; | |
820 | } | |
821 | ||
822 | early_param("reservelow", parse_reservelow); | |
823 | ||
95c96084 PA |
824 | static void __init trim_low_memory_range(void) |
825 | { | |
826 | memblock_reserve(0, ALIGN(reserve_low, PAGE_SIZE)); | |
827 | } | |
828 | ||
1da177e4 LT |
829 | /* |
830 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
831 | * passed the efi memmap, systab, etc., so we should use these data structures | |
832 | * for initialization. Note, the efi init code path is determined by the | |
833 | * global efi_enabled. This allows the same kernel image to be used on existing | |
834 | * systems (with a traditional BIOS) as well as on EFI systems. | |
835 | */ | |
76934ed4 YL |
836 | /* |
837 | * setup_arch - architecture-specific boot-time initializations | |
838 | * | |
839 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
840 | */ | |
841 | ||
1da177e4 LT |
842 | void __init setup_arch(char **cmdline_p) |
843 | { | |
6c902b65 YL |
844 | memblock_reserve(__pa_symbol(_text), |
845 | (unsigned long)__bss_stop - (unsigned long)_text); | |
846 | ||
1b8c78be YL |
847 | early_reserve_initrd(); |
848 | ||
6c902b65 YL |
849 | /* |
850 | * At this point everything still needed from the boot loader | |
851 | * or BIOS or kernel text should be early reserved or marked not | |
852 | * RAM in e820. All other memory is free game. | |
853 | */ | |
854 | ||
76934ed4 | 855 | #ifdef CONFIG_X86_32 |
1da177e4 | 856 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
3b33553b | 857 | visws_early_detect(); |
b40827fa BP |
858 | |
859 | /* | |
860 | * copy kernel address range established so far and switch | |
861 | * to the proper swapper page table | |
862 | */ | |
863 | clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY, | |
864 | initial_page_table + KERNEL_PGD_BOUNDARY, | |
865 | KERNEL_PGD_PTRS); | |
866 | ||
867 | load_cr3(swapper_pg_dir); | |
868 | __flush_tlb_all(); | |
76934ed4 YL |
869 | #else |
870 | printk(KERN_INFO "Command line: %s\n", boot_command_line); | |
871 | #endif | |
1da177e4 | 872 | |
9863c90f AK |
873 | /* |
874 | * If we have OLPC OFW, we might end up relocating the fixmap due to | |
875 | * reserve_top(), so do this before touching the ioremap area. | |
876 | */ | |
fd699c76 AS |
877 | olpc_ofw_detect(); |
878 | ||
29c84391 | 879 | early_trap_init(); |
9e882c92 | 880 | early_cpu_init(); |
1a98fd14 JF |
881 | early_ioremap_init(); |
882 | ||
fd699c76 AS |
883 | setup_olpc_ofw_pgd(); |
884 | ||
30c82645 PA |
885 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
886 | screen_info = boot_params.screen_info; | |
887 | edid_info = boot_params.edid_info; | |
76934ed4 | 888 | #ifdef CONFIG_X86_32 |
30c82645 PA |
889 | apm_info.bios = boot_params.apm_bios_info; |
890 | ist_info = boot_params.ist_info; | |
76934ed4 | 891 | if (boot_params.sys_desc_table.length != 0) { |
30c82645 PA |
892 | machine_id = boot_params.sys_desc_table.table[0]; |
893 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
894 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 895 | } |
76934ed4 YL |
896 | #endif |
897 | saved_video_mode = boot_params.hdr.vid_mode; | |
30c82645 | 898 | bootloader_type = boot_params.hdr.type_of_loader; |
5031296c PA |
899 | if ((bootloader_type >> 4) == 0xe) { |
900 | bootloader_type &= 0xf; | |
901 | bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; | |
902 | } | |
903 | bootloader_version = bootloader_type & 0xf; | |
904 | bootloader_version |= boot_params.hdr.ext_loader_ver << 4; | |
1da177e4 LT |
905 | |
906 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
907 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
908 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
909 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 910 | #endif |
7465252e YL |
911 | #ifdef CONFIG_EFI |
912 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
1adbfa35 | 913 | "EL32", 4)) { |
83e68189 | 914 | set_bit(EFI_BOOT, &x86_efi_facility); |
1adbfa35 OJ |
915 | } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, |
916 | "EL64", 4)) { | |
83e68189 MF |
917 | set_bit(EFI_BOOT, &x86_efi_facility); |
918 | set_bit(EFI_64BIT, &x86_efi_facility); | |
7465252e | 919 | } |
83e68189 MF |
920 | |
921 | if (efi_enabled(EFI_BOOT)) | |
922 | efi_memblock_x86_reserve_range(); | |
7465252e YL |
923 | #endif |
924 | ||
42bbdb43 | 925 | x86_init.oem.arch_setup(); |
2215e69d | 926 | |
419afdf5 | 927 | iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; |
0dbfafa5 | 928 | setup_memory_map(); |
28bb2237 | 929 | parse_setup_data(); |
a0a0becd YL |
930 | /* update the e820_saved too */ |
931 | e820_reserve_setup_data(); | |
28bb2237 | 932 | |
1da177e4 LT |
933 | copy_edd(); |
934 | ||
30c82645 | 935 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
936 | root_mountflags &= ~MS_RDONLY; |
937 | init_mm.start_code = (unsigned long) _text; | |
938 | init_mm.end_code = (unsigned long) _etext; | |
939 | init_mm.end_data = (unsigned long) _edata; | |
93dbda7c | 940 | init_mm.brk = _brk_end; |
1da177e4 | 941 | |
fc8d7826 AD |
942 | code_resource.start = __pa_symbol(_text); |
943 | code_resource.end = __pa_symbol(_etext)-1; | |
944 | data_resource.start = __pa_symbol(_etext); | |
945 | data_resource.end = __pa_symbol(_edata)-1; | |
946 | bss_resource.start = __pa_symbol(__bss_start); | |
947 | bss_resource.end = __pa_symbol(__bss_stop)-1; | |
1da177e4 | 948 | |
516cbf37 TB |
949 | #ifdef CONFIG_CMDLINE_BOOL |
950 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
951 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
952 | #else | |
953 | if (builtin_cmdline[0]) { | |
954 | /* append boot loader cmdline to builtin */ | |
955 | strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); | |
956 | strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); | |
957 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
958 | } | |
959 | #endif | |
960 | #endif | |
961 | ||
eda6da92 YL |
962 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
963 | *cmdline_p = command_line; | |
964 | ||
eda6da92 | 965 | /* |
4b0f3b81 KC |
966 | * x86_configure_nx() is called before parse_early_param() to detect |
967 | * whether hardware doesn't support NX (so that the early EHCI debug | |
968 | * console setup can safely call set_fixmap()). It may then be called | |
969 | * again from within noexec_setup() during parsing early parameters | |
970 | * to honor the respective command line option. | |
eda6da92 | 971 | */ |
4763ed4d | 972 | x86_configure_nx(); |
eda6da92 YL |
973 | |
974 | parse_early_param(); | |
975 | ||
4b0f3b81 | 976 | x86_report_nx(); |
0ad5bce7 | 977 | |
28bb2237 | 978 | /* after early param, so could get panic from serial */ |
a9ce6bc1 | 979 | memblock_x86_reserve_range_setup_data(); |
28bb2237 | 980 | |
76934ed4 | 981 | if (acpi_mps_check()) { |
3eb11edc | 982 | #ifdef CONFIG_X86_LOCAL_APIC |
76934ed4 | 983 | disable_apic = 1; |
3eb11edc | 984 | #endif |
988781dc | 985 | setup_clear_cpu_cap(X86_FEATURE_APIC); |
3c999f14 YL |
986 | } |
987 | ||
dc7c65db LT |
988 | #ifdef CONFIG_PCI |
989 | if (pci_early_dump_regs) | |
990 | early_dump_pci_devices(); | |
991 | #endif | |
992 | ||
0dbfafa5 | 993 | finish_e820_parsing(); |
1a3f239d | 994 | |
83e68189 | 995 | if (efi_enabled(EFI_BOOT)) |
ff0c0874 BM |
996 | efi_init(); |
997 | ||
2216d199 | 998 | dmi_scan_machine(); |
98e5e1bf | 999 | dmi_set_dump_stack_arch_desc(); |
2216d199 | 1000 | |
88b094fb AK |
1001 | /* |
1002 | * VMware detection requires dmi to be available, so this | |
1003 | * needs to be done after dmi_scan_machine, for the BP. | |
1004 | */ | |
2d826404 | 1005 | init_hypervisor_platform(); |
88b094fb | 1006 | |
f7cf5a5b | 1007 | x86_init.resources.probe_roms(); |
41c094fd YL |
1008 | |
1009 | /* after parse_early_param, so could debug it */ | |
1010 | insert_resource(&iomem_resource, &code_resource); | |
1011 | insert_resource(&iomem_resource, &data_resource); | |
1012 | insert_resource(&iomem_resource, &bss_resource); | |
1013 | ||
b422a309 | 1014 | e820_add_kernel_range(); |
1b5576e6 | 1015 | trim_bios_range(); |
76934ed4 | 1016 | #ifdef CONFIG_X86_32 |
cc9f7a0c YL |
1017 | if (ppro_with_ram_bug()) { |
1018 | e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, | |
1019 | E820_RESERVED); | |
1020 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
1021 | printk(KERN_INFO "fixed physical RAM map:\n"); | |
1022 | e820_print_map("bad_ppro"); | |
1023 | } | |
76934ed4 YL |
1024 | #else |
1025 | early_gart_iommu_check(); | |
1026 | #endif | |
cc9f7a0c | 1027 | |
7b2a0a6c YL |
1028 | /* |
1029 | * partially used pages are not usable - thus | |
1030 | * we are rounding upwards: | |
1031 | */ | |
f361a450 | 1032 | max_pfn = e820_end_of_ram_pfn(); |
7b2a0a6c | 1033 | |
093af8d7 YL |
1034 | /* update e820 for memory not covered by WB MTRRs */ |
1035 | mtrr_bp_init(); | |
2dc807b3 | 1036 | if (mtrr_trim_uncached_memory(max_pfn)) |
f361a450 | 1037 | max_pfn = e820_end_of_ram_pfn(); |
76c32418 | 1038 | |
76934ed4 | 1039 | #ifdef CONFIG_X86_32 |
4e29684c | 1040 | /* max_low_pfn get updated here */ |
2ec65f8b | 1041 | find_low_pfn_range(); |
76934ed4 | 1042 | #else |
06cd9a7d | 1043 | check_x2apic(); |
76934ed4 YL |
1044 | |
1045 | /* How many end-of-memory variables you have, grandma! */ | |
1046 | /* need this before calling reserve_initrd */ | |
f361a450 YL |
1047 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
1048 | max_low_pfn = e820_end_of_low_ram_pfn(); | |
1049 | else | |
1050 | max_low_pfn = max_pfn; | |
1051 | ||
76934ed4 | 1052 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
5394f80f JF |
1053 | #endif |
1054 | ||
893f38d1 YL |
1055 | /* |
1056 | * Find and reserve possible boot-time SMP configuration: | |
1057 | */ | |
1058 | find_smp_config(); | |
1059 | ||
042be38e YL |
1060 | reserve_ibft_region(); |
1061 | ||
8d57470d YL |
1062 | early_alloc_pgt_buf(); |
1063 | ||
72d7c3b3 YL |
1064 | /* |
1065 | * Need to conclude brk, before memblock_x86_fill() | |
1066 | * it could use memblock_find_in_range, could overlap with | |
1067 | * brk area. | |
1068 | */ | |
1069 | reserve_brk(); | |
1070 | ||
e5f15b45 YL |
1071 | cleanup_highmap(); |
1072 | ||
dd7dfad7 | 1073 | memblock.current_limit = ISA_END_ADDRESS; |
72d7c3b3 YL |
1074 | memblock_x86_fill(); |
1075 | ||
916f676f MG |
1076 | /* |
1077 | * The EFI specification says that boot service code won't be called | |
1078 | * after ExitBootServices(). This is, in fact, a lie. | |
1079 | */ | |
83e68189 | 1080 | if (efi_enabled(EFI_MEMMAP)) |
916f676f MG |
1081 | efi_reserve_boot_services(); |
1082 | ||
72d7c3b3 YL |
1083 | /* preallocate 4k for mptable mpc */ |
1084 | early_reserve_e820_mpc_new(); | |
1085 | ||
1086 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION | |
1087 | setup_bios_corruption_check(); | |
1088 | #endif | |
1089 | ||
10054230 | 1090 | #ifdef CONFIG_X86_32 |
365811d6 BH |
1091 | printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n", |
1092 | (max_pfn_mapped<<PAGE_SHIFT) - 1); | |
10054230 | 1093 | #endif |
72d7c3b3 | 1094 | |
4f7b9226 | 1095 | reserve_real_mode(); |
893f38d1 | 1096 | |
a9acc536 | 1097 | trim_platform_memory_ranges(); |
95c96084 | 1098 | trim_low_memory_range(); |
a9acc536 | 1099 | |
22ddfcaa | 1100 | init_mem_mapping(); |
1bbbbe77 | 1101 | |
8170e6be | 1102 | early_trap_pf_init(); |
1bbbbe77 | 1103 | |
4f7b9226 | 1104 | setup_real_mode(); |
1bbbbe77 | 1105 | |
72d7c3b3 | 1106 | memblock.current_limit = get_max_mapped(); |
0a2b9a6e | 1107 | dma_contiguous_reserve(0); |
4e29684c | 1108 | |
e7b37895 YL |
1109 | /* |
1110 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
1111 | */ | |
1112 | ||
1113 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
1114 | if (init_ohci1394_dma_early) | |
1115 | init_ohci1394_dma_on_all_controllers(); | |
1116 | #endif | |
162a7e75 MT |
1117 | /* Allocate bigger log buffer */ |
1118 | setup_log_buf(1); | |
e7b37895 | 1119 | |
2ec65f8b YL |
1120 | reserve_initrd(); |
1121 | ||
3dfd8235 | 1122 | #if defined(CONFIG_ACPI) && defined(CONFIG_BLK_DEV_INITRD) |
53aac44c | 1123 | acpi_initrd_override((void *)initrd_start, initrd_end - initrd_start); |
3dfd8235 | 1124 | #endif |
53aac44c | 1125 | |
44280733 YL |
1126 | reserve_crashkernel(); |
1127 | ||
76934ed4 | 1128 | vsmp_init(); |
76934ed4 | 1129 | |
1c6e5503 YL |
1130 | io_delay_init(); |
1131 | ||
1c6e5503 YL |
1132 | /* |
1133 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
1134 | */ | |
20e6926d YL |
1135 | acpi_boot_table_init(); |
1136 | ||
1137 | early_acpi_boot_init(); | |
1138 | ||
d8fc3afc | 1139 | initmem_init(); |
6f2a7536 | 1140 | memblock_find_dma_reserve(); |
91467bdf | 1141 | |
90993cdd | 1142 | #ifdef CONFIG_KVM_GUEST |
790c73f6 GOC |
1143 | kvmclock_init(); |
1144 | #endif | |
1145 | ||
7737b215 | 1146 | x86_init.paging.pagetable_init(); |
f212ec4b | 1147 | |
4da9484b PA |
1148 | if (boot_cpu_data.cpuid_level >= 0) { |
1149 | /* A CPU has %cr4 if and only if it has CPUID */ | |
1150 | mmu_cr4_features = read_cr4(); | |
cda846f1 JS |
1151 | if (trampoline_cr4_features) |
1152 | *trampoline_cr4_features = mmu_cr4_features; | |
4da9484b PA |
1153 | } |
1154 | ||
b40827fa BP |
1155 | #ifdef CONFIG_X86_32 |
1156 | /* sync back kernel address range */ | |
1157 | clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, | |
1158 | swapper_pg_dir + KERNEL_PGD_BOUNDARY, | |
1159 | KERNEL_PGD_PTRS); | |
1160 | #endif | |
fd89a137 | 1161 | |
31625340 JC |
1162 | tboot_probe(); |
1163 | ||
76934ed4 YL |
1164 | #ifdef CONFIG_X86_64 |
1165 | map_vsyscall(); | |
1166 | #endif | |
1167 | ||
1a3f239d | 1168 | generic_apic_probe(); |
1da177e4 | 1169 | |
54ef3400 | 1170 | early_quirks(); |
d44647b0 | 1171 | |
295deae4 YL |
1172 | /* |
1173 | * Read APIC and some other early information from ACPI tables. | |
1174 | */ | |
1da177e4 | 1175 | acpi_boot_init(); |
efafc8b2 | 1176 | sfi_init(); |
a906fdaa | 1177 | x86_dtb_init(); |
04606618 | 1178 | |
295deae4 YL |
1179 | /* |
1180 | * get boot-time SMP configuration: | |
1181 | */ | |
e0da3364 YL |
1182 | if (smp_found_config) |
1183 | get_smp_config(); | |
76934ed4 | 1184 | |
329513a3 | 1185 | prefill_possible_map(); |
301e6190 | 1186 | |
5f4765f9 | 1187 | init_cpu_to_node(); |
5f4765f9 | 1188 | |
76934ed4 | 1189 | init_apic_mappings(); |
9438ef7f IM |
1190 | if (x86_io_apic_ops.init) |
1191 | x86_io_apic_ops.init(); | |
9d6a4d08 | 1192 | |
295deae4 | 1193 | kvm_guest_init(); |
1da177e4 | 1194 | |
41c094fd | 1195 | e820_reserve_resources(); |
bf62f398 | 1196 | e820_mark_nosave_regions(max_low_pfn); |
1da177e4 | 1197 | |
8fee697d | 1198 | x86_init.resources.reserve_resources(); |
41c094fd YL |
1199 | |
1200 | e820_setup_gap(); | |
1201 | ||
1da177e4 LT |
1202 | #ifdef CONFIG_VT |
1203 | #if defined(CONFIG_VGA_CONSOLE) | |
83e68189 | 1204 | if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) |
1da177e4 LT |
1205 | conswitchp = &vga_con; |
1206 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
1207 | conswitchp = &dummy_con; | |
1208 | #endif | |
1209 | #endif | |
6f30c1ac | 1210 | x86_init.oem.banner(); |
a2202aa2 | 1211 | |
6b617e22 FT |
1212 | x86_init.timers.wallclock_init(); |
1213 | ||
a2202aa2 | 1214 | mcheck_init(); |
f49aa448 | 1215 | |
dc326fca | 1216 | arch_init_ideal_nops(); |
b3c869d3 JS |
1217 | |
1218 | register_refined_jiffies(CLOCK_TICK_RATE); | |
5189c2a7 OJ |
1219 | |
1220 | #ifdef CONFIG_EFI | |
83e68189 MF |
1221 | /* Once setup is done above, unmap the EFI memory map on |
1222 | * mismatched firmware/kernel archtectures since there is no | |
1223 | * support for runtime services. | |
5189c2a7 | 1224 | */ |
6b59e366 | 1225 | if (efi_enabled(EFI_BOOT) && !efi_is_native()) { |
5189c2a7 OJ |
1226 | pr_info("efi: Setup done, disabling due to 32/64-bit mismatch\n"); |
1227 | efi_unmap_memmap(); | |
5189c2a7 OJ |
1228 | } |
1229 | #endif | |
1da177e4 | 1230 | } |
5649b7c3 | 1231 | |
9be1b56a IM |
1232 | #ifdef CONFIG_X86_32 |
1233 | ||
8fee697d TG |
1234 | static struct resource video_ram_resource = { |
1235 | .name = "Video RAM area", | |
1236 | .start = 0xa0000, | |
1237 | .end = 0xbffff, | |
1238 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
9be1b56a IM |
1239 | }; |
1240 | ||
8fee697d | 1241 | void __init i386_reserve_resources(void) |
9be1b56a | 1242 | { |
8fee697d TG |
1243 | request_resource(&iomem_resource, &video_ram_resource); |
1244 | reserve_standard_io_resources(); | |
9be1b56a IM |
1245 | } |
1246 | ||
9be1b56a | 1247 | #endif /* CONFIG_X86_32 */ |