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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 | |
042623bb YL |
111 | #ifndef ARCH_SETUP |
112 | #define ARCH_SETUP | |
113 | #endif | |
114 | ||
2b72394e PE |
115 | /* |
116 | * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries. | |
117 | * The direct mapping extends to max_pfn_mapped, so that we can directly access | |
118 | * apertures, ACPI and other tables without having to play with fixmaps. | |
119 | */ | |
120 | unsigned long max_low_pfn_mapped; | |
121 | unsigned long max_pfn_mapped; | |
122 | ||
796216a5 JF |
123 | RESERVE_BRK(dmi_alloc, 65536); |
124 | ||
c0b5842a IM |
125 | unsigned int boot_cpu_id __read_mostly; |
126 | ||
93dbda7c JF |
127 | static __initdata unsigned long _brk_start = (unsigned long)__brk_base; |
128 | unsigned long _brk_end = (unsigned long)__brk_base; | |
129 | ||
c0b5842a IM |
130 | #ifdef CONFIG_X86_64 |
131 | int default_cpu_present_to_apicid(int mps_cpu) | |
132 | { | |
133 | return __default_cpu_present_to_apicid(mps_cpu); | |
134 | } | |
135 | ||
136 | int default_check_phys_apicid_present(int boot_cpu_physical_apicid) | |
137 | { | |
138 | return __default_check_phys_apicid_present(boot_cpu_physical_apicid); | |
139 | } | |
140 | #endif | |
141 | ||
217b8ce8 YL |
142 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
143 | struct boot_params __initdata boot_params; | |
144 | #else | |
145 | struct boot_params boot_params; | |
146 | #endif | |
147 | ||
1da177e4 LT |
148 | /* |
149 | * Machine setup.. | |
150 | */ | |
c9cce83d BW |
151 | static struct resource data_resource = { |
152 | .name = "Kernel data", | |
153 | .start = 0, | |
154 | .end = 0, | |
155 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
156 | }; | |
157 | ||
158 | static struct resource code_resource = { | |
159 | .name = "Kernel code", | |
160 | .start = 0, | |
161 | .end = 0, | |
162 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
163 | }; | |
164 | ||
165 | static struct resource bss_resource = { | |
166 | .name = "Kernel bss", | |
167 | .start = 0, | |
168 | .end = 0, | |
169 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
170 | }; | |
171 | ||
7dea23ec YL |
172 | |
173 | #ifdef CONFIG_X86_32 | |
c9cce83d BW |
174 | static struct resource video_ram_resource = { |
175 | .name = "Video RAM area", | |
176 | .start = 0xa0000, | |
177 | .end = 0xbffff, | |
178 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
179 | }; | |
180 | ||
1da177e4 | 181 | /* cpu data as detected by the assembly code in head.S */ |
7dea23ec | 182 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
1da177e4 | 183 | /* common cpu data for all cpus */ |
7dea23ec | 184 | struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
129f6946 | 185 | EXPORT_SYMBOL(boot_cpu_data); |
7dea23ec YL |
186 | static void set_mca_bus(int x) |
187 | { | |
188 | #ifdef CONFIG_MCA | |
189 | MCA_bus = x; | |
190 | #endif | |
191 | } | |
1da177e4 | 192 | |
0c254e38 AS |
193 | unsigned int def_to_bigsmp; |
194 | ||
1da177e4 LT |
195 | /* for MCA, but anyone else can use it if they want */ |
196 | unsigned int machine_id; | |
197 | unsigned int machine_submodel_id; | |
198 | unsigned int BIOS_revision; | |
1da177e4 | 199 | |
7dea23ec YL |
200 | struct apm_info apm_info; |
201 | EXPORT_SYMBOL(apm_info); | |
202 | ||
203 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ | |
204 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
205 | struct ist_info ist_info; | |
206 | EXPORT_SYMBOL(ist_info); | |
207 | #else | |
208 | struct ist_info ist_info; | |
209 | #endif | |
210 | ||
211 | #else | |
ed26dbe5 JF |
212 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { |
213 | .x86_phys_bits = MAX_PHYSMEM_BITS, | |
214 | }; | |
7dea23ec YL |
215 | EXPORT_SYMBOL(boot_cpu_data); |
216 | #endif | |
217 | ||
218 | ||
219 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) | |
220 | unsigned long mmu_cr4_features; | |
221 | #else | |
222 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
223 | #endif | |
224 | ||
5031296c PA |
225 | /* Boot loader ID and version as integers, for the benefit of proc_dointvec */ |
226 | int bootloader_type, bootloader_version; | |
1da177e4 | 227 | |
1da177e4 LT |
228 | /* |
229 | * Setup options | |
230 | */ | |
1da177e4 | 231 | struct screen_info screen_info; |
129f6946 | 232 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 233 | struct edid_info edid_info; |
5e518d76 | 234 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 235 | |
1da177e4 LT |
236 | extern int root_mountflags; |
237 | ||
e44b7b75 | 238 | unsigned long saved_video_mode; |
1da177e4 | 239 | |
cf8fa920 | 240 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 241 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 242 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 243 | |
4e498b66 | 244 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
516cbf37 TB |
245 | #ifdef CONFIG_CMDLINE_BOOL |
246 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
247 | #endif | |
1da177e4 | 248 | |
1da177e4 LT |
249 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
250 | struct edd edd; | |
251 | #ifdef CONFIG_EDD_MODULE | |
252 | EXPORT_SYMBOL(edd); | |
253 | #endif | |
254 | /** | |
255 | * copy_edd() - Copy the BIOS EDD information | |
256 | * from boot_params into a safe place. | |
257 | * | |
258 | */ | |
259 | static inline void copy_edd(void) | |
260 | { | |
30c82645 PA |
261 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
262 | sizeof(edd.mbr_signature)); | |
263 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
264 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
265 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
266 | } |
267 | #else | |
268 | static inline void copy_edd(void) | |
269 | { | |
270 | } | |
271 | #endif | |
272 | ||
5368a2be PA |
273 | void * __init extend_brk(size_t size, size_t align) |
274 | { | |
275 | size_t mask = align - 1; | |
276 | void *ret; | |
277 | ||
278 | BUG_ON(_brk_start == 0); | |
279 | BUG_ON(align & mask); | |
280 | ||
281 | _brk_end = (_brk_end + mask) & ~mask; | |
282 | BUG_ON((char *)(_brk_end + size) > __brk_limit); | |
283 | ||
284 | ret = (void *)_brk_end; | |
285 | _brk_end += size; | |
286 | ||
287 | memset(ret, 0, size); | |
288 | ||
289 | return ret; | |
290 | } | |
291 | ||
292 | static void __init reserve_brk(void) | |
293 | { | |
294 | if (_brk_end > _brk_start) | |
295 | reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK"); | |
296 | ||
297 | /* Mark brk area as locked down and no longer taking any | |
298 | new allocations */ | |
299 | _brk_start = 0; | |
300 | } | |
301 | ||
cf8fa920 PA |
302 | #ifdef CONFIG_BLK_DEV_INITRD |
303 | ||
eb1379cb YL |
304 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) |
305 | static void __init relocate_initrd(void) | |
cf8fa920 | 306 | { |
eb1379cb | 307 | |
ba5b14cc YL |
308 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
309 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
8c5dd8f4 | 310 | u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; |
ba5b14cc | 311 | u64 ramdisk_here; |
eb1379cb YL |
312 | unsigned long slop, clen, mapaddr; |
313 | char *p, *q; | |
cf8fa920 PA |
314 | |
315 | /* We need to move the initrd down into lowmem */ | |
4e29684c YL |
316 | ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, |
317 | PAGE_SIZE); | |
cf8fa920 | 318 | |
3945e2c9 YL |
319 | if (ramdisk_here == -1ULL) |
320 | panic("Cannot find place for new RAMDISK of size %lld\n", | |
321 | ramdisk_size); | |
322 | ||
cf8fa920 PA |
323 | /* Note: this includes all the lowmem currently occupied by |
324 | the initrd, we rely on that fact to keep the data intact. */ | |
3945e2c9 | 325 | reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, |
ba5b14cc | 326 | "NEW RAMDISK"); |
cf8fa920 PA |
327 | initrd_start = ramdisk_here + PAGE_OFFSET; |
328 | initrd_end = initrd_start + ramdisk_size; | |
f0d43100 YL |
329 | printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", |
330 | ramdisk_here, ramdisk_here + ramdisk_size); | |
cf8fa920 | 331 | |
cf8fa920 PA |
332 | q = (char *)initrd_start; |
333 | ||
334 | /* Copy any lowmem portion of the initrd */ | |
335 | if (ramdisk_image < end_of_lowmem) { | |
336 | clen = end_of_lowmem - ramdisk_image; | |
337 | p = (char *)__va(ramdisk_image); | |
338 | memcpy(q, p, clen); | |
339 | q += clen; | |
340 | ramdisk_image += clen; | |
341 | ramdisk_size -= clen; | |
342 | } | |
343 | ||
344 | /* Copy the highmem portion of the initrd */ | |
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 | } | |
a4c81cf6 | 358 | /* high pages is not converted by early_res_to_bootmem */ |
ba5b14cc YL |
359 | ramdisk_image = boot_params.hdr.ramdisk_image; |
360 | ramdisk_size = boot_params.hdr.ramdisk_size; | |
eb1379cb YL |
361 | printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" |
362 | " %08llx - %08llx\n", | |
ba5b14cc YL |
363 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
364 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
eb1379cb | 365 | } |
9a27f5c5 | 366 | |
eb1379cb YL |
367 | static void __init reserve_initrd(void) |
368 | { | |
369 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; | |
370 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
371 | u64 ramdisk_end = ramdisk_image + ramdisk_size; | |
8c5dd8f4 | 372 | u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; |
eb1379cb YL |
373 | |
374 | if (!boot_params.hdr.type_of_loader || | |
375 | !ramdisk_image || !ramdisk_size) | |
376 | return; /* No initrd provided by bootloader */ | |
377 | ||
378 | initrd_start = 0; | |
379 | ||
380 | if (ramdisk_size >= (end_of_lowmem>>1)) { | |
381 | free_early(ramdisk_image, ramdisk_end); | |
382 | printk(KERN_ERR "initrd too large to handle, " | |
383 | "disabling initrd\n"); | |
384 | return; | |
385 | } | |
386 | ||
387 | printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, | |
388 | ramdisk_end); | |
389 | ||
390 | ||
391 | if (ramdisk_end <= end_of_lowmem) { | |
392 | /* All in lowmem, easy case */ | |
393 | /* | |
394 | * don't need to reserve again, already reserved early | |
395 | * in i386_start_kernel | |
396 | */ | |
397 | initrd_start = ramdisk_image + PAGE_OFFSET; | |
398 | initrd_end = initrd_start + ramdisk_size; | |
399 | return; | |
400 | } | |
401 | ||
eb1379cb | 402 | relocate_initrd(); |
8c5dd8f4 | 403 | |
eb1379cb | 404 | free_early(ramdisk_image, ramdisk_end); |
cf8fa920 | 405 | } |
225c37d7 | 406 | #else |
eb1379cb | 407 | static void __init reserve_initrd(void) |
225c37d7 YL |
408 | { |
409 | } | |
cf8fa920 PA |
410 | #endif /* CONFIG_BLK_DEV_INITRD */ |
411 | ||
29f784e3 | 412 | static void __init parse_setup_data(void) |
257b0fde YL |
413 | { |
414 | struct setup_data *data; | |
415 | u64 pa_data; | |
416 | ||
417 | if (boot_params.hdr.version < 0x0209) | |
418 | return; | |
419 | pa_data = boot_params.hdr.setup_data; | |
420 | while (pa_data) { | |
88b4c146 | 421 | data = early_memremap(pa_data, PAGE_SIZE); |
257b0fde YL |
422 | switch (data->type) { |
423 | case SETUP_E820_EXT: | |
424 | parse_e820_ext(data, pa_data); | |
425 | break; | |
426 | default: | |
427 | break; | |
428 | } | |
257b0fde YL |
429 | pa_data = data->next; |
430 | early_iounmap(data, PAGE_SIZE); | |
431 | } | |
432 | } | |
433 | ||
a0a0becd | 434 | static void __init e820_reserve_setup_data(void) |
28bb2237 YL |
435 | { |
436 | struct setup_data *data; | |
437 | u64 pa_data; | |
d9a81b44 | 438 | int found = 0; |
28bb2237 YL |
439 | |
440 | if (boot_params.hdr.version < 0x0209) | |
441 | return; | |
442 | pa_data = boot_params.hdr.setup_data; | |
443 | while (pa_data) { | |
88b4c146 | 444 | data = early_memremap(pa_data, sizeof(*data)); |
28bb2237 YL |
445 | e820_update_range(pa_data, sizeof(*data)+data->len, |
446 | E820_RAM, E820_RESERVED_KERN); | |
d9a81b44 | 447 | found = 1; |
28bb2237 YL |
448 | pa_data = data->next; |
449 | early_iounmap(data, sizeof(*data)); | |
450 | } | |
d9a81b44 YL |
451 | if (!found) |
452 | return; | |
453 | ||
28bb2237 | 454 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
a0a0becd | 455 | memcpy(&e820_saved, &e820, sizeof(struct e820map)); |
28bb2237 YL |
456 | printk(KERN_INFO "extended physical RAM map:\n"); |
457 | e820_print_map("reserve setup_data"); | |
458 | } | |
459 | ||
a0a0becd YL |
460 | static void __init reserve_early_setup_data(void) |
461 | { | |
462 | struct setup_data *data; | |
463 | u64 pa_data; | |
464 | char buf[32]; | |
465 | ||
466 | if (boot_params.hdr.version < 0x0209) | |
467 | return; | |
468 | pa_data = boot_params.hdr.setup_data; | |
469 | while (pa_data) { | |
88b4c146 | 470 | data = early_memremap(pa_data, sizeof(*data)); |
a0a0becd YL |
471 | sprintf(buf, "setup data %x", data->type); |
472 | reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); | |
473 | pa_data = data->next; | |
474 | early_iounmap(data, sizeof(*data)); | |
475 | } | |
476 | } | |
477 | ||
ccb4defa YL |
478 | /* |
479 | * --------- Crashkernel reservation ------------------------------ | |
480 | */ | |
481 | ||
482 | #ifdef CONFIG_KEXEC | |
32105f7f BW |
483 | |
484 | /** | |
485 | * Reserve @size bytes of crashkernel memory at any suitable offset. | |
486 | * | |
487 | * @size: Size of the crashkernel memory to reserve. | |
488 | * Returns the base address on success, and -1ULL on failure. | |
489 | */ | |
a9b43c7d | 490 | static |
6b356022 | 491 | unsigned long long __init find_and_reserve_crashkernel(unsigned long long size) |
32105f7f BW |
492 | { |
493 | const unsigned long long alignment = 16<<20; /* 16M */ | |
494 | unsigned long long start = 0LL; | |
495 | ||
496 | while (1) { | |
497 | int ret; | |
498 | ||
499 | start = find_e820_area(start, ULONG_MAX, size, alignment); | |
500 | if (start == -1ULL) | |
501 | return start; | |
502 | ||
503 | /* try to reserve it */ | |
504 | ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE); | |
505 | if (ret >= 0) | |
506 | return start; | |
507 | ||
508 | start += alignment; | |
509 | } | |
510 | } | |
511 | ||
ccb4defa YL |
512 | static inline unsigned long long get_total_mem(void) |
513 | { | |
514 | unsigned long long total; | |
515 | ||
516 | total = max_low_pfn - min_low_pfn; | |
517 | #ifdef CONFIG_HIGHMEM | |
518 | total += highend_pfn - highstart_pfn; | |
519 | #endif | |
520 | ||
521 | return total << PAGE_SHIFT; | |
522 | } | |
523 | ||
29f784e3 | 524 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
525 | { |
526 | unsigned long long total_mem; | |
527 | unsigned long long crash_size, crash_base; | |
528 | int ret; | |
529 | ||
530 | total_mem = get_total_mem(); | |
531 | ||
532 | ret = parse_crashkernel(boot_command_line, total_mem, | |
533 | &crash_size, &crash_base); | |
32105f7f BW |
534 | if (ret != 0 || crash_size <= 0) |
535 | return; | |
536 | ||
537 | /* 0 means: find the address automatically */ | |
538 | if (crash_base <= 0) { | |
539 | crash_base = find_and_reserve_crashkernel(crash_size); | |
540 | if (crash_base == -1ULL) { | |
541 | pr_info("crashkernel reservation failed. " | |
542 | "No suitable area found.\n"); | |
ccb4defa YL |
543 | return; |
544 | } | |
32105f7f BW |
545 | } else { |
546 | ret = reserve_bootmem_generic(crash_base, crash_size, | |
547 | BOOTMEM_EXCLUSIVE); | |
548 | if (ret < 0) { | |
549 | pr_info("crashkernel reservation failed - " | |
550 | "memory is in use\n"); | |
ccb4defa YL |
551 | return; |
552 | } | |
32105f7f | 553 | } |
ccb4defa | 554 | |
32105f7f BW |
555 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " |
556 | "for crashkernel (System RAM: %ldMB)\n", | |
557 | (unsigned long)(crash_size >> 20), | |
558 | (unsigned long)(crash_base >> 20), | |
559 | (unsigned long)(total_mem >> 20)); | |
ccb4defa | 560 | |
32105f7f BW |
561 | crashk_res.start = crash_base; |
562 | crashk_res.end = crash_base + crash_size - 1; | |
563 | insert_resource(&iomem_resource, &crashk_res); | |
ccb4defa YL |
564 | } |
565 | #else | |
29f784e3 | 566 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
567 | { |
568 | } | |
569 | #endif | |
570 | ||
bdba0e70 YL |
571 | static struct resource standard_io_resources[] = { |
572 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
573 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
574 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
575 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
576 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
577 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
578 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
579 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
580 | { .name = "keyboard", .start = 0x60, .end = 0x60, | |
581 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
582 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
583 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
584 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
585 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
586 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
587 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
588 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
589 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
590 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
591 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
592 | }; | |
593 | ||
29f784e3 | 594 | static void __init reserve_standard_io_resources(void) |
bdba0e70 YL |
595 | { |
596 | int i; | |
597 | ||
598 | /* request I/O space for devices used on all i[345]86 PCs */ | |
599 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
600 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
601 | ||
602 | } | |
603 | ||
57cac4d1 VG |
604 | /* |
605 | * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by | |
606 | * is_kdump_kernel() to determine if we are booting after a panic. Hence | |
607 | * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. | |
608 | */ | |
609 | ||
610 | #ifdef CONFIG_CRASH_DUMP | |
0196bcbb YL |
611 | /* elfcorehdr= specifies the location of elf core header |
612 | * stored by the crashed kernel. This option will be passed | |
613 | * by kexec loader to the capture kernel. | |
614 | */ | |
615 | static int __init setup_elfcorehdr(char *arg) | |
616 | { | |
617 | char *end; | |
618 | if (!arg) | |
619 | return -EINVAL; | |
620 | elfcorehdr_addr = memparse(arg, &end); | |
621 | return end > arg ? 0 : -EINVAL; | |
622 | } | |
623 | early_param("elfcorehdr", setup_elfcorehdr); | |
624 | #endif | |
625 | ||
2b6163bf | 626 | static struct x86_quirks default_x86_quirks __initdata; |
9f077871 | 627 | |
3c9cb6de | 628 | struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; |
5394f80f | 629 | |
bb557460 | 630 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
5649b7c3 IM |
631 | static int __init dmi_low_memory_corruption(const struct dmi_system_id *d) |
632 | { | |
633 | printk(KERN_NOTICE | |
45608399 | 634 | "%s detected: BIOS may corrupt low RAM, working around it.\n", |
5649b7c3 IM |
635 | d->ident); |
636 | ||
2216d199 YL |
637 | e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED); |
638 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
5649b7c3 IM |
639 | |
640 | return 0; | |
641 | } | |
bb557460 | 642 | #endif |
5649b7c3 IM |
643 | |
644 | /* List of systems that have known low memory corruption BIOS problems */ | |
645 | static struct dmi_system_id __initdata bad_bios_dmi_table[] = { | |
fc381519 | 646 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
5649b7c3 IM |
647 | { |
648 | .callback = dmi_low_memory_corruption, | |
649 | .ident = "AMI BIOS", | |
650 | .matches = { | |
651 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), | |
652 | }, | |
653 | }, | |
1e22436e IM |
654 | { |
655 | .callback = dmi_low_memory_corruption, | |
656 | .ident = "Phoenix BIOS", | |
657 | .matches = { | |
0af40a4b | 658 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"), |
1e22436e IM |
659 | }, |
660 | }, | |
fc381519 | 661 | #endif |
a8b71a28 | 662 | {} |
5649b7c3 IM |
663 | }; |
664 | ||
1da177e4 LT |
665 | /* |
666 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
667 | * passed the efi memmap, systab, etc., so we should use these data structures | |
668 | * for initialization. Note, the efi init code path is determined by the | |
669 | * global efi_enabled. This allows the same kernel image to be used on existing | |
670 | * systems (with a traditional BIOS) as well as on EFI systems. | |
671 | */ | |
76934ed4 YL |
672 | /* |
673 | * setup_arch - architecture-specific boot-time initializations | |
674 | * | |
675 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
676 | */ | |
677 | ||
1da177e4 LT |
678 | void __init setup_arch(char **cmdline_p) |
679 | { | |
76934ed4 | 680 | #ifdef CONFIG_X86_32 |
1da177e4 | 681 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
3b33553b | 682 | visws_early_detect(); |
76934ed4 YL |
683 | #else |
684 | printk(KERN_INFO "Command line: %s\n", boot_command_line); | |
685 | #endif | |
1da177e4 | 686 | |
ae8d04e2 ZA |
687 | /* VMI may relocate the fixmap; do this before touching ioremap area */ |
688 | vmi_init(); | |
689 | ||
9e882c92 | 690 | early_cpu_init(); |
1a98fd14 JF |
691 | early_ioremap_init(); |
692 | ||
30c82645 PA |
693 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
694 | screen_info = boot_params.screen_info; | |
695 | edid_info = boot_params.edid_info; | |
76934ed4 | 696 | #ifdef CONFIG_X86_32 |
30c82645 PA |
697 | apm_info.bios = boot_params.apm_bios_info; |
698 | ist_info = boot_params.ist_info; | |
76934ed4 | 699 | if (boot_params.sys_desc_table.length != 0) { |
30c82645 PA |
700 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); |
701 | machine_id = boot_params.sys_desc_table.table[0]; | |
702 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
703 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 704 | } |
76934ed4 YL |
705 | #endif |
706 | saved_video_mode = boot_params.hdr.vid_mode; | |
30c82645 | 707 | bootloader_type = boot_params.hdr.type_of_loader; |
5031296c PA |
708 | if ((bootloader_type >> 4) == 0xe) { |
709 | bootloader_type &= 0xf; | |
710 | bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; | |
711 | } | |
712 | bootloader_version = bootloader_type & 0xf; | |
713 | bootloader_version |= boot_params.hdr.ext_loader_ver << 4; | |
1da177e4 LT |
714 | |
715 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
716 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
717 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
718 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 719 | #endif |
7465252e YL |
720 | #ifdef CONFIG_EFI |
721 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
76934ed4 YL |
722 | #ifdef CONFIG_X86_32 |
723 | "EL32", | |
724 | #else | |
725 | "EL64", | |
726 | #endif | |
727 | 4)) { | |
7465252e YL |
728 | efi_enabled = 1; |
729 | efi_reserve_early(); | |
730 | } | |
731 | #endif | |
732 | ||
1da177e4 | 733 | ARCH_SETUP |
2215e69d | 734 | |
0dbfafa5 | 735 | setup_memory_map(); |
28bb2237 | 736 | parse_setup_data(); |
a0a0becd YL |
737 | /* update the e820_saved too */ |
738 | e820_reserve_setup_data(); | |
28bb2237 | 739 | |
1da177e4 LT |
740 | copy_edd(); |
741 | ||
30c82645 | 742 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
743 | root_mountflags &= ~MS_RDONLY; |
744 | init_mm.start_code = (unsigned long) _text; | |
745 | init_mm.end_code = (unsigned long) _etext; | |
746 | init_mm.end_data = (unsigned long) _edata; | |
93dbda7c | 747 | init_mm.brk = _brk_end; |
1da177e4 LT |
748 | |
749 | code_resource.start = virt_to_phys(_text); | |
750 | code_resource.end = virt_to_phys(_etext)-1; | |
751 | data_resource.start = virt_to_phys(_etext); | |
752 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
753 | bss_resource.start = virt_to_phys(&__bss_start); |
754 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 755 | |
516cbf37 TB |
756 | #ifdef CONFIG_CMDLINE_BOOL |
757 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
758 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
759 | #else | |
760 | if (builtin_cmdline[0]) { | |
761 | /* append boot loader cmdline to builtin */ | |
762 | strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); | |
763 | strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); | |
764 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
765 | } | |
766 | #endif | |
767 | #endif | |
768 | ||
9a2e5930 YL |
769 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
770 | *cmdline_p = command_line; | |
771 | ||
1a3f239d | 772 | parse_early_param(); |
1da177e4 | 773 | |
0ad5bce7 JF |
774 | #ifdef CONFIG_X86_64 |
775 | check_efer(); | |
776 | #endif | |
777 | ||
ae8d04e2 ZA |
778 | /* Must be before kernel pagetables are setup */ |
779 | vmi_activate(); | |
3a6ddd5f | 780 | |
28bb2237 | 781 | /* after early param, so could get panic from serial */ |
a0a0becd | 782 | reserve_early_setup_data(); |
28bb2237 | 783 | |
76934ed4 | 784 | if (acpi_mps_check()) { |
3eb11edc | 785 | #ifdef CONFIG_X86_LOCAL_APIC |
76934ed4 | 786 | disable_apic = 1; |
3eb11edc | 787 | #endif |
988781dc | 788 | setup_clear_cpu_cap(X86_FEATURE_APIC); |
3c999f14 YL |
789 | } |
790 | ||
dc7c65db LT |
791 | #ifdef CONFIG_PCI |
792 | if (pci_early_dump_regs) | |
793 | early_dump_pci_devices(); | |
794 | #endif | |
795 | ||
0dbfafa5 | 796 | finish_e820_parsing(); |
1a3f239d | 797 | |
ff0c0874 BM |
798 | if (efi_enabled) |
799 | efi_init(); | |
800 | ||
2216d199 YL |
801 | dmi_scan_machine(); |
802 | ||
803 | dmi_check_system(bad_bios_dmi_table); | |
804 | ||
88b094fb AK |
805 | /* |
806 | * VMware detection requires dmi to be available, so this | |
807 | * needs to be done after dmi_scan_machine, for the BP. | |
808 | */ | |
809 | init_hypervisor(&boot_cpu_data); | |
810 | ||
76934ed4 | 811 | #ifdef CONFIG_X86_32 |
41c094fd | 812 | probe_roms(); |
76934ed4 | 813 | #endif |
41c094fd YL |
814 | |
815 | /* after parse_early_param, so could debug it */ | |
816 | insert_resource(&iomem_resource, &code_resource); | |
817 | insert_resource(&iomem_resource, &data_resource); | |
818 | insert_resource(&iomem_resource, &bss_resource); | |
819 | ||
8b2cb7a8 | 820 | |
76934ed4 | 821 | #ifdef CONFIG_X86_32 |
cc9f7a0c YL |
822 | if (ppro_with_ram_bug()) { |
823 | e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, | |
824 | E820_RESERVED); | |
825 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
826 | printk(KERN_INFO "fixed physical RAM map:\n"); | |
827 | e820_print_map("bad_ppro"); | |
828 | } | |
76934ed4 YL |
829 | #else |
830 | early_gart_iommu_check(); | |
831 | #endif | |
cc9f7a0c | 832 | |
7b2a0a6c YL |
833 | /* |
834 | * partially used pages are not usable - thus | |
835 | * we are rounding upwards: | |
836 | */ | |
f361a450 | 837 | max_pfn = e820_end_of_ram_pfn(); |
7b2a0a6c | 838 | |
6780711e YL |
839 | /* preallocate 4k for mptable mpc */ |
840 | early_reserve_e820_mpc_new(); | |
093af8d7 YL |
841 | /* update e820 for memory not covered by WB MTRRs */ |
842 | mtrr_bp_init(); | |
2dc807b3 | 843 | if (mtrr_trim_uncached_memory(max_pfn)) |
f361a450 | 844 | max_pfn = e820_end_of_ram_pfn(); |
76c32418 | 845 | |
76934ed4 | 846 | #ifdef CONFIG_X86_32 |
4e29684c | 847 | /* max_low_pfn get updated here */ |
2ec65f8b | 848 | find_low_pfn_range(); |
76934ed4 YL |
849 | #else |
850 | num_physpages = max_pfn; | |
851 | ||
06cd9a7d | 852 | check_x2apic(); |
76934ed4 YL |
853 | |
854 | /* How many end-of-memory variables you have, grandma! */ | |
855 | /* need this before calling reserve_initrd */ | |
f361a450 YL |
856 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
857 | max_low_pfn = e820_end_of_low_ram_pfn(); | |
858 | else | |
859 | max_low_pfn = max_pfn; | |
860 | ||
76934ed4 | 861 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
80989ce0 | 862 | max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT; |
76934ed4 | 863 | #endif |
2ec65f8b | 864 | |
5394f80f JF |
865 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION |
866 | setup_bios_corruption_check(); | |
867 | #endif | |
868 | ||
80989ce0 YL |
869 | printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n", |
870 | max_pfn_mapped<<PAGE_SHIFT); | |
871 | ||
93dbda7c JF |
872 | reserve_brk(); |
873 | ||
4e29684c | 874 | /* max_pfn_mapped is updated here */ |
f361a450 YL |
875 | max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); |
876 | max_pfn_mapped = max_low_pfn_mapped; | |
877 | ||
878 | #ifdef CONFIG_X86_64 | |
879 | if (max_pfn > max_low_pfn) { | |
880 | max_pfn_mapped = init_memory_mapping(1UL<<32, | |
881 | max_pfn<<PAGE_SHIFT); | |
882 | /* can we preseve max_low_pfn ?*/ | |
883 | max_low_pfn = max_pfn; | |
884 | } | |
885 | #endif | |
4e29684c | 886 | |
e7b37895 YL |
887 | /* |
888 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
889 | */ | |
890 | ||
891 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
892 | if (init_ohci1394_dma_early) | |
893 | init_ohci1394_dma_on_all_controllers(); | |
894 | #endif | |
895 | ||
2ec65f8b YL |
896 | reserve_initrd(); |
897 | ||
76934ed4 | 898 | vsmp_init(); |
76934ed4 | 899 | |
1c6e5503 YL |
900 | io_delay_init(); |
901 | ||
1c6e5503 YL |
902 | /* |
903 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
904 | */ | |
905 | acpi_boot_table_init(); | |
1c6e5503 | 906 | |
2e42060c JS |
907 | early_acpi_boot_init(); |
908 | ||
1c6e5503 | 909 | #ifdef CONFIG_ACPI_NUMA |
f2f865fe YL |
910 | /* |
911 | * Parse SRAT to discover nodes. | |
912 | */ | |
913 | acpi_numa_init(); | |
1c6e5503 YL |
914 | #endif |
915 | ||
2ec65f8b | 916 | initmem_init(0, max_pfn); |
093af8d7 | 917 | |
593a0cc3 YL |
918 | #ifdef CONFIG_ACPI_SLEEP |
919 | /* | |
920 | * Reserve low memory region for sleep support. | |
921 | */ | |
922 | acpi_reserve_bootmem(); | |
923 | #endif | |
593a0cc3 YL |
924 | /* |
925 | * Find and reserve possible boot-time SMP configuration: | |
926 | */ | |
927 | find_smp_config(); | |
550fe4f1 | 928 | |
593a0cc3 YL |
929 | reserve_crashkernel(); |
930 | ||
91467bdf BW |
931 | #ifdef CONFIG_X86_64 |
932 | /* | |
933 | * dma32_reserve_bootmem() allocates bootmem which may conflict | |
934 | * with the crashkernel command line, so do that after | |
935 | * reserve_crashkernel() | |
936 | */ | |
937 | dma32_reserve_bootmem(); | |
938 | #endif | |
939 | ||
593a0cc3 YL |
940 | reserve_ibft_region(); |
941 | ||
790c73f6 GOC |
942 | #ifdef CONFIG_KVM_CLOCK |
943 | kvmclock_init(); | |
944 | #endif | |
945 | ||
a312b37b | 946 | paravirt_pagetable_setup_start(swapper_pg_dir); |
1da177e4 | 947 | paging_init(); |
a312b37b | 948 | paravirt_pagetable_setup_done(swapper_pg_dir); |
c1f2f09e | 949 | paravirt_post_allocator_init(); |
f212ec4b | 950 | |
76934ed4 YL |
951 | #ifdef CONFIG_X86_64 |
952 | map_vsyscall(); | |
953 | #endif | |
954 | ||
1a3f239d | 955 | generic_apic_probe(); |
1da177e4 | 956 | |
54ef3400 | 957 | early_quirks(); |
d44647b0 | 958 | |
295deae4 YL |
959 | /* |
960 | * Read APIC and some other early information from ACPI tables. | |
961 | */ | |
1da177e4 | 962 | acpi_boot_init(); |
04606618 | 963 | |
e0da3364 | 964 | #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS) |
295deae4 YL |
965 | /* |
966 | * get boot-time SMP configuration: | |
967 | */ | |
e0da3364 YL |
968 | if (smp_found_config) |
969 | get_smp_config(); | |
970 | #endif | |
76934ed4 | 971 | |
329513a3 | 972 | prefill_possible_map(); |
301e6190 | 973 | |
5f4765f9 YL |
974 | #ifdef CONFIG_X86_64 |
975 | init_cpu_to_node(); | |
976 | #endif | |
977 | ||
76934ed4 YL |
978 | init_apic_mappings(); |
979 | ioapic_init_mappings(); | |
f3294a33 | 980 | |
9d6a4d08 | 981 | /* need to wait for io_apic is mapped */ |
be5d5350 | 982 | probe_nr_irqs_gsi(); |
9d6a4d08 | 983 | |
295deae4 | 984 | kvm_guest_init(); |
1da177e4 | 985 | |
41c094fd | 986 | e820_reserve_resources(); |
bf62f398 | 987 | e820_mark_nosave_regions(max_low_pfn); |
1da177e4 | 988 | |
76934ed4 | 989 | #ifdef CONFIG_X86_32 |
41c094fd | 990 | request_resource(&iomem_resource, &video_ram_resource); |
76934ed4 | 991 | #endif |
ce97c40e | 992 | reserve_standard_io_resources(); |
41c094fd YL |
993 | |
994 | e820_setup_gap(); | |
995 | ||
1da177e4 LT |
996 | #ifdef CONFIG_VT |
997 | #if defined(CONFIG_VGA_CONSOLE) | |
998 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
999 | conswitchp = &vga_con; | |
1000 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
1001 | conswitchp = &dummy_con; | |
1002 | #endif | |
1003 | #endif | |
1004 | } | |
5649b7c3 | 1005 | |
9be1b56a IM |
1006 | #ifdef CONFIG_X86_32 |
1007 | ||
9be1b56a | 1008 | /** |
8e6dafd6 | 1009 | * x86_quirk_intr_init - post gate setup interrupt initialisation |
9be1b56a IM |
1010 | * |
1011 | * Description: | |
1012 | * Fill in any interrupts that may have been left out by the general | |
1013 | * init_IRQ() routine. interrupts having to do with the machine rather | |
1014 | * than the devices on the I/O bus (like APIC interrupts in intel MP | |
1015 | * systems) are started here. | |
1016 | **/ | |
8e6dafd6 | 1017 | void __init x86_quirk_intr_init(void) |
9be1b56a IM |
1018 | { |
1019 | if (x86_quirks->arch_intr_init) { | |
1020 | if (x86_quirks->arch_intr_init()) | |
1021 | return; | |
1022 | } | |
1023 | } | |
1024 | ||
9be1b56a | 1025 | /** |
8e6dafd6 | 1026 | * x86_quirk_trap_init - initialise system specific traps |
9be1b56a IM |
1027 | * |
1028 | * Description: | |
1029 | * Called as the final act of trap_init(). Used in VISWS to initialise | |
1030 | * the various board specific APIC traps. | |
1031 | **/ | |
8e6dafd6 | 1032 | void __init x86_quirk_trap_init(void) |
9be1b56a IM |
1033 | { |
1034 | if (x86_quirks->arch_trap_init) { | |
1035 | if (x86_quirks->arch_trap_init()) | |
1036 | return; | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | static struct irqaction irq0 = { | |
1041 | .handler = timer_interrupt, | |
fc6fc7f1 | 1042 | .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER, |
9be1b56a IM |
1043 | .name = "timer" |
1044 | }; | |
1045 | ||
1046 | /** | |
8e6dafd6 | 1047 | * x86_quirk_pre_time_init - do any specific initialisations before. |
9be1b56a IM |
1048 | * |
1049 | **/ | |
8e6dafd6 | 1050 | void __init x86_quirk_pre_time_init(void) |
9be1b56a IM |
1051 | { |
1052 | if (x86_quirks->arch_pre_time_init) | |
1053 | x86_quirks->arch_pre_time_init(); | |
1054 | } | |
1055 | ||
1056 | /** | |
8e6dafd6 | 1057 | * x86_quirk_time_init - do any specific initialisations for the system timer. |
9be1b56a IM |
1058 | * |
1059 | * Description: | |
1060 | * Must plug the system timer interrupt source at HZ into the IRQ listed | |
1061 | * in irq_vectors.h:TIMER_IRQ | |
1062 | **/ | |
8e6dafd6 | 1063 | void __init x86_quirk_time_init(void) |
9be1b56a IM |
1064 | { |
1065 | if (x86_quirks->arch_time_init) { | |
1066 | /* | |
1067 | * A nonzero return code does not mean failure, it means | |
1068 | * that the architecture quirk does not want any | |
1069 | * generic (timer) setup to be performed after this: | |
1070 | */ | |
1071 | if (x86_quirks->arch_time_init()) | |
1072 | return; | |
1073 | } | |
1074 | ||
1075 | irq0.mask = cpumask_of_cpu(0); | |
1076 | setup_irq(0, &irq0); | |
1077 | } | |
9be1b56a | 1078 | #endif /* CONFIG_X86_32 */ |