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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 | ||
c0b5842a IM |
115 | unsigned int boot_cpu_id __read_mostly; |
116 | ||
93dbda7c JF |
117 | static __initdata unsigned long _brk_start = (unsigned long)__brk_base; |
118 | unsigned long _brk_end = (unsigned long)__brk_base; | |
119 | ||
c0b5842a IM |
120 | #ifdef CONFIG_X86_64 |
121 | int default_cpu_present_to_apicid(int mps_cpu) | |
122 | { | |
123 | return __default_cpu_present_to_apicid(mps_cpu); | |
124 | } | |
125 | ||
126 | int default_check_phys_apicid_present(int boot_cpu_physical_apicid) | |
127 | { | |
128 | return __default_check_phys_apicid_present(boot_cpu_physical_apicid); | |
129 | } | |
130 | #endif | |
131 | ||
217b8ce8 YL |
132 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
133 | struct boot_params __initdata boot_params; | |
134 | #else | |
135 | struct boot_params boot_params; | |
136 | #endif | |
137 | ||
1da177e4 LT |
138 | /* |
139 | * Machine setup.. | |
140 | */ | |
c9cce83d BW |
141 | static struct resource data_resource = { |
142 | .name = "Kernel data", | |
143 | .start = 0, | |
144 | .end = 0, | |
145 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
146 | }; | |
147 | ||
148 | static struct resource code_resource = { | |
149 | .name = "Kernel code", | |
150 | .start = 0, | |
151 | .end = 0, | |
152 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
153 | }; | |
154 | ||
155 | static struct resource bss_resource = { | |
156 | .name = "Kernel bss", | |
157 | .start = 0, | |
158 | .end = 0, | |
159 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
160 | }; | |
161 | ||
7dea23ec YL |
162 | |
163 | #ifdef CONFIG_X86_32 | |
5092301c YL |
164 | /* This value is set up by the early boot code to point to the value |
165 | immediately after the boot time page tables. It contains a *physical* | |
166 | address, and must not be in the .bss segment! */ | |
167 | unsigned long init_pg_tables_start __initdata = ~0UL; | |
168 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
169 | ||
c9cce83d BW |
170 | static struct resource video_ram_resource = { |
171 | .name = "Video RAM area", | |
172 | .start = 0xa0000, | |
173 | .end = 0xbffff, | |
174 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
175 | }; | |
176 | ||
1da177e4 | 177 | /* cpu data as detected by the assembly code in head.S */ |
7dea23ec | 178 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
1da177e4 | 179 | /* common cpu data for all cpus */ |
7dea23ec | 180 | struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
129f6946 | 181 | EXPORT_SYMBOL(boot_cpu_data); |
7dea23ec YL |
182 | static void set_mca_bus(int x) |
183 | { | |
184 | #ifdef CONFIG_MCA | |
185 | MCA_bus = x; | |
186 | #endif | |
187 | } | |
1da177e4 | 188 | |
0c254e38 AS |
189 | unsigned int def_to_bigsmp; |
190 | ||
1da177e4 LT |
191 | /* for MCA, but anyone else can use it if they want */ |
192 | unsigned int machine_id; | |
193 | unsigned int machine_submodel_id; | |
194 | unsigned int BIOS_revision; | |
1da177e4 | 195 | |
7dea23ec YL |
196 | struct apm_info apm_info; |
197 | EXPORT_SYMBOL(apm_info); | |
198 | ||
199 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ | |
200 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
201 | struct ist_info ist_info; | |
202 | EXPORT_SYMBOL(ist_info); | |
203 | #else | |
204 | struct ist_info ist_info; | |
205 | #endif | |
206 | ||
207 | #else | |
ed26dbe5 JF |
208 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { |
209 | .x86_phys_bits = MAX_PHYSMEM_BITS, | |
210 | }; | |
7dea23ec YL |
211 | EXPORT_SYMBOL(boot_cpu_data); |
212 | #endif | |
213 | ||
214 | ||
215 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) | |
216 | unsigned long mmu_cr4_features; | |
217 | #else | |
218 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
219 | #endif | |
220 | ||
1da177e4 LT |
221 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
222 | int bootloader_type; | |
223 | ||
1c6e5503 YL |
224 | /* |
225 | * Early DMI memory | |
226 | */ | |
227 | int dmi_alloc_index; | |
228 | char dmi_alloc_data[DMI_MAX_DATA]; | |
229 | ||
1da177e4 LT |
230 | /* |
231 | * Setup options | |
232 | */ | |
1da177e4 | 233 | struct screen_info screen_info; |
129f6946 | 234 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 235 | struct edid_info edid_info; |
5e518d76 | 236 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 237 | |
1da177e4 LT |
238 | extern int root_mountflags; |
239 | ||
e44b7b75 | 240 | unsigned long saved_video_mode; |
1da177e4 | 241 | |
cf8fa920 | 242 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 243 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 244 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 245 | |
4e498b66 | 246 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
516cbf37 TB |
247 | #ifdef CONFIG_CMDLINE_BOOL |
248 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
249 | #endif | |
1da177e4 | 250 | |
1da177e4 LT |
251 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
252 | struct edd edd; | |
253 | #ifdef CONFIG_EDD_MODULE | |
254 | EXPORT_SYMBOL(edd); | |
255 | #endif | |
256 | /** | |
257 | * copy_edd() - Copy the BIOS EDD information | |
258 | * from boot_params into a safe place. | |
259 | * | |
260 | */ | |
261 | static inline void copy_edd(void) | |
262 | { | |
30c82645 PA |
263 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
264 | sizeof(edd.mbr_signature)); | |
265 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
266 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
267 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
268 | } |
269 | #else | |
270 | static inline void copy_edd(void) | |
271 | { | |
272 | } | |
273 | #endif | |
274 | ||
cf8fa920 PA |
275 | #ifdef CONFIG_BLK_DEV_INITRD |
276 | ||
eb1379cb | 277 | #ifdef CONFIG_X86_32 |
cf8fa920 | 278 | |
eb1379cb YL |
279 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) |
280 | static void __init relocate_initrd(void) | |
cf8fa920 | 281 | { |
eb1379cb | 282 | |
ba5b14cc YL |
283 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
284 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
ba5b14cc YL |
285 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; |
286 | u64 ramdisk_here; | |
eb1379cb YL |
287 | unsigned long slop, clen, mapaddr; |
288 | char *p, *q; | |
cf8fa920 PA |
289 | |
290 | /* We need to move the initrd down into lowmem */ | |
4e29684c YL |
291 | ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, |
292 | PAGE_SIZE); | |
cf8fa920 | 293 | |
3945e2c9 YL |
294 | if (ramdisk_here == -1ULL) |
295 | panic("Cannot find place for new RAMDISK of size %lld\n", | |
296 | ramdisk_size); | |
297 | ||
cf8fa920 PA |
298 | /* Note: this includes all the lowmem currently occupied by |
299 | the initrd, we rely on that fact to keep the data intact. */ | |
3945e2c9 | 300 | reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, |
ba5b14cc | 301 | "NEW RAMDISK"); |
cf8fa920 PA |
302 | initrd_start = ramdisk_here + PAGE_OFFSET; |
303 | initrd_end = initrd_start + ramdisk_size; | |
f0d43100 YL |
304 | printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", |
305 | ramdisk_here, ramdisk_here + ramdisk_size); | |
cf8fa920 | 306 | |
cf8fa920 PA |
307 | q = (char *)initrd_start; |
308 | ||
309 | /* Copy any lowmem portion of the initrd */ | |
310 | if (ramdisk_image < end_of_lowmem) { | |
311 | clen = end_of_lowmem - ramdisk_image; | |
312 | p = (char *)__va(ramdisk_image); | |
313 | memcpy(q, p, clen); | |
314 | q += clen; | |
315 | ramdisk_image += clen; | |
316 | ramdisk_size -= clen; | |
317 | } | |
318 | ||
319 | /* Copy the highmem portion of the initrd */ | |
320 | while (ramdisk_size) { | |
321 | slop = ramdisk_image & ~PAGE_MASK; | |
322 | clen = ramdisk_size; | |
323 | if (clen > MAX_MAP_CHUNK-slop) | |
324 | clen = MAX_MAP_CHUNK-slop; | |
325 | mapaddr = ramdisk_image & PAGE_MASK; | |
88b4c146 | 326 | p = early_memremap(mapaddr, clen+slop); |
cf8fa920 | 327 | memcpy(q, p+slop, clen); |
beacfaac | 328 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
329 | q += clen; |
330 | ramdisk_image += clen; | |
331 | ramdisk_size -= clen; | |
332 | } | |
a4c81cf6 | 333 | /* high pages is not converted by early_res_to_bootmem */ |
ba5b14cc YL |
334 | ramdisk_image = boot_params.hdr.ramdisk_image; |
335 | ramdisk_size = boot_params.hdr.ramdisk_size; | |
eb1379cb YL |
336 | printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" |
337 | " %08llx - %08llx\n", | |
ba5b14cc YL |
338 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
339 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
eb1379cb YL |
340 | } |
341 | #endif | |
9a27f5c5 | 342 | |
93dbda7c JF |
343 | void * __init extend_brk(size_t size, size_t align) |
344 | { | |
345 | size_t mask = align - 1; | |
346 | void *ret; | |
347 | ||
348 | BUG_ON(_brk_start == 0); | |
349 | BUG_ON(align & mask); | |
350 | ||
351 | _brk_end = (_brk_end + mask) & ~mask; | |
352 | BUG_ON((char *)(_brk_end + size) > __brk_limit); | |
353 | ||
354 | ret = (void *)_brk_end; | |
355 | _brk_end += size; | |
356 | ||
357 | memset(ret, 0, size); | |
358 | ||
359 | return ret; | |
360 | } | |
361 | ||
362 | static void __init reserve_brk(void) | |
363 | { | |
364 | if (_brk_end > _brk_start) | |
365 | reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK"); | |
366 | ||
367 | /* Mark brk area as locked down and no longer taking any new allocations */ | |
368 | _brk_start = 0; | |
369 | } | |
370 | ||
eb1379cb YL |
371 | static void __init reserve_initrd(void) |
372 | { | |
373 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; | |
374 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
375 | u64 ramdisk_end = ramdisk_image + ramdisk_size; | |
376 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
377 | ||
378 | if (!boot_params.hdr.type_of_loader || | |
379 | !ramdisk_image || !ramdisk_size) | |
380 | return; /* No initrd provided by bootloader */ | |
381 | ||
382 | initrd_start = 0; | |
383 | ||
384 | if (ramdisk_size >= (end_of_lowmem>>1)) { | |
385 | free_early(ramdisk_image, ramdisk_end); | |
386 | printk(KERN_ERR "initrd too large to handle, " | |
387 | "disabling initrd\n"); | |
388 | return; | |
389 | } | |
390 | ||
391 | printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, | |
392 | ramdisk_end); | |
393 | ||
394 | ||
395 | if (ramdisk_end <= end_of_lowmem) { | |
396 | /* All in lowmem, easy case */ | |
397 | /* | |
398 | * don't need to reserve again, already reserved early | |
399 | * in i386_start_kernel | |
400 | */ | |
401 | initrd_start = ramdisk_image + PAGE_OFFSET; | |
402 | initrd_end = initrd_start + ramdisk_size; | |
403 | return; | |
404 | } | |
405 | ||
406 | #ifdef CONFIG_X86_32 | |
407 | relocate_initrd(); | |
408 | #else | |
409 | printk(KERN_ERR "initrd extends beyond end of memory " | |
410 | "(0x%08llx > 0x%08llx)\ndisabling initrd\n", | |
411 | ramdisk_end, end_of_lowmem); | |
412 | initrd_start = 0; | |
413 | #endif | |
414 | free_early(ramdisk_image, ramdisk_end); | |
cf8fa920 | 415 | } |
225c37d7 | 416 | #else |
eb1379cb | 417 | static void __init reserve_initrd(void) |
225c37d7 YL |
418 | { |
419 | } | |
cf8fa920 PA |
420 | #endif /* CONFIG_BLK_DEV_INITRD */ |
421 | ||
29f784e3 | 422 | static void __init parse_setup_data(void) |
257b0fde YL |
423 | { |
424 | struct setup_data *data; | |
425 | u64 pa_data; | |
426 | ||
427 | if (boot_params.hdr.version < 0x0209) | |
428 | return; | |
429 | pa_data = boot_params.hdr.setup_data; | |
430 | while (pa_data) { | |
88b4c146 | 431 | data = early_memremap(pa_data, PAGE_SIZE); |
257b0fde YL |
432 | switch (data->type) { |
433 | case SETUP_E820_EXT: | |
434 | parse_e820_ext(data, pa_data); | |
435 | break; | |
436 | default: | |
437 | break; | |
438 | } | |
257b0fde YL |
439 | pa_data = data->next; |
440 | early_iounmap(data, PAGE_SIZE); | |
441 | } | |
442 | } | |
443 | ||
a0a0becd | 444 | static void __init e820_reserve_setup_data(void) |
28bb2237 YL |
445 | { |
446 | struct setup_data *data; | |
447 | u64 pa_data; | |
d9a81b44 | 448 | int found = 0; |
28bb2237 YL |
449 | |
450 | if (boot_params.hdr.version < 0x0209) | |
451 | return; | |
452 | pa_data = boot_params.hdr.setup_data; | |
453 | while (pa_data) { | |
88b4c146 | 454 | data = early_memremap(pa_data, sizeof(*data)); |
28bb2237 YL |
455 | e820_update_range(pa_data, sizeof(*data)+data->len, |
456 | E820_RAM, E820_RESERVED_KERN); | |
d9a81b44 | 457 | found = 1; |
28bb2237 YL |
458 | pa_data = data->next; |
459 | early_iounmap(data, sizeof(*data)); | |
460 | } | |
d9a81b44 YL |
461 | if (!found) |
462 | return; | |
463 | ||
28bb2237 | 464 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
a0a0becd | 465 | memcpy(&e820_saved, &e820, sizeof(struct e820map)); |
28bb2237 YL |
466 | printk(KERN_INFO "extended physical RAM map:\n"); |
467 | e820_print_map("reserve setup_data"); | |
468 | } | |
469 | ||
a0a0becd YL |
470 | static void __init reserve_early_setup_data(void) |
471 | { | |
472 | struct setup_data *data; | |
473 | u64 pa_data; | |
474 | char buf[32]; | |
475 | ||
476 | if (boot_params.hdr.version < 0x0209) | |
477 | return; | |
478 | pa_data = boot_params.hdr.setup_data; | |
479 | while (pa_data) { | |
88b4c146 | 480 | data = early_memremap(pa_data, sizeof(*data)); |
a0a0becd YL |
481 | sprintf(buf, "setup data %x", data->type); |
482 | reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); | |
483 | pa_data = data->next; | |
484 | early_iounmap(data, sizeof(*data)); | |
485 | } | |
486 | } | |
487 | ||
ccb4defa YL |
488 | /* |
489 | * --------- Crashkernel reservation ------------------------------ | |
490 | */ | |
491 | ||
492 | #ifdef CONFIG_KEXEC | |
32105f7f BW |
493 | |
494 | /** | |
495 | * Reserve @size bytes of crashkernel memory at any suitable offset. | |
496 | * | |
497 | * @size: Size of the crashkernel memory to reserve. | |
498 | * Returns the base address on success, and -1ULL on failure. | |
499 | */ | |
a9b43c7d | 500 | static |
6b356022 | 501 | unsigned long long __init find_and_reserve_crashkernel(unsigned long long size) |
32105f7f BW |
502 | { |
503 | const unsigned long long alignment = 16<<20; /* 16M */ | |
504 | unsigned long long start = 0LL; | |
505 | ||
506 | while (1) { | |
507 | int ret; | |
508 | ||
509 | start = find_e820_area(start, ULONG_MAX, size, alignment); | |
510 | if (start == -1ULL) | |
511 | return start; | |
512 | ||
513 | /* try to reserve it */ | |
514 | ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE); | |
515 | if (ret >= 0) | |
516 | return start; | |
517 | ||
518 | start += alignment; | |
519 | } | |
520 | } | |
521 | ||
ccb4defa YL |
522 | static inline unsigned long long get_total_mem(void) |
523 | { | |
524 | unsigned long long total; | |
525 | ||
526 | total = max_low_pfn - min_low_pfn; | |
527 | #ifdef CONFIG_HIGHMEM | |
528 | total += highend_pfn - highstart_pfn; | |
529 | #endif | |
530 | ||
531 | return total << PAGE_SHIFT; | |
532 | } | |
533 | ||
29f784e3 | 534 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
535 | { |
536 | unsigned long long total_mem; | |
537 | unsigned long long crash_size, crash_base; | |
538 | int ret; | |
539 | ||
540 | total_mem = get_total_mem(); | |
541 | ||
542 | ret = parse_crashkernel(boot_command_line, total_mem, | |
543 | &crash_size, &crash_base); | |
32105f7f BW |
544 | if (ret != 0 || crash_size <= 0) |
545 | return; | |
546 | ||
547 | /* 0 means: find the address automatically */ | |
548 | if (crash_base <= 0) { | |
549 | crash_base = find_and_reserve_crashkernel(crash_size); | |
550 | if (crash_base == -1ULL) { | |
551 | pr_info("crashkernel reservation failed. " | |
552 | "No suitable area found.\n"); | |
ccb4defa YL |
553 | return; |
554 | } | |
32105f7f BW |
555 | } else { |
556 | ret = reserve_bootmem_generic(crash_base, crash_size, | |
557 | BOOTMEM_EXCLUSIVE); | |
558 | if (ret < 0) { | |
559 | pr_info("crashkernel reservation failed - " | |
560 | "memory is in use\n"); | |
ccb4defa YL |
561 | return; |
562 | } | |
32105f7f | 563 | } |
ccb4defa | 564 | |
32105f7f BW |
565 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " |
566 | "for crashkernel (System RAM: %ldMB)\n", | |
567 | (unsigned long)(crash_size >> 20), | |
568 | (unsigned long)(crash_base >> 20), | |
569 | (unsigned long)(total_mem >> 20)); | |
ccb4defa | 570 | |
32105f7f BW |
571 | crashk_res.start = crash_base; |
572 | crashk_res.end = crash_base + crash_size - 1; | |
573 | insert_resource(&iomem_resource, &crashk_res); | |
ccb4defa YL |
574 | } |
575 | #else | |
29f784e3 | 576 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
577 | { |
578 | } | |
579 | #endif | |
580 | ||
bdba0e70 YL |
581 | static struct resource standard_io_resources[] = { |
582 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
583 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
584 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
585 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
586 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
587 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
588 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
589 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
590 | { .name = "keyboard", .start = 0x60, .end = 0x60, | |
591 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
592 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
593 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
594 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
595 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
596 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
597 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
598 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
599 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
600 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
601 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
602 | }; | |
603 | ||
29f784e3 | 604 | static void __init reserve_standard_io_resources(void) |
bdba0e70 YL |
605 | { |
606 | int i; | |
607 | ||
608 | /* request I/O space for devices used on all i[345]86 PCs */ | |
609 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
610 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
611 | ||
612 | } | |
613 | ||
57cac4d1 VG |
614 | /* |
615 | * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by | |
616 | * is_kdump_kernel() to determine if we are booting after a panic. Hence | |
617 | * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. | |
618 | */ | |
619 | ||
620 | #ifdef CONFIG_CRASH_DUMP | |
0196bcbb YL |
621 | /* elfcorehdr= specifies the location of elf core header |
622 | * stored by the crashed kernel. This option will be passed | |
623 | * by kexec loader to the capture kernel. | |
624 | */ | |
625 | static int __init setup_elfcorehdr(char *arg) | |
626 | { | |
627 | char *end; | |
628 | if (!arg) | |
629 | return -EINVAL; | |
630 | elfcorehdr_addr = memparse(arg, &end); | |
631 | return end > arg ? 0 : -EINVAL; | |
632 | } | |
633 | early_param("elfcorehdr", setup_elfcorehdr); | |
634 | #endif | |
635 | ||
2b6163bf | 636 | static struct x86_quirks default_x86_quirks __initdata; |
9f077871 | 637 | |
3c9cb6de | 638 | struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; |
5394f80f | 639 | |
bb557460 | 640 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
5649b7c3 IM |
641 | static int __init dmi_low_memory_corruption(const struct dmi_system_id *d) |
642 | { | |
643 | printk(KERN_NOTICE | |
45608399 | 644 | "%s detected: BIOS may corrupt low RAM, working around it.\n", |
5649b7c3 IM |
645 | d->ident); |
646 | ||
2216d199 YL |
647 | e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED); |
648 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
5649b7c3 IM |
649 | |
650 | return 0; | |
651 | } | |
bb557460 | 652 | #endif |
5649b7c3 IM |
653 | |
654 | /* List of systems that have known low memory corruption BIOS problems */ | |
655 | static struct dmi_system_id __initdata bad_bios_dmi_table[] = { | |
fc381519 | 656 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
5649b7c3 IM |
657 | { |
658 | .callback = dmi_low_memory_corruption, | |
659 | .ident = "AMI BIOS", | |
660 | .matches = { | |
661 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), | |
662 | }, | |
663 | }, | |
1e22436e IM |
664 | { |
665 | .callback = dmi_low_memory_corruption, | |
666 | .ident = "Phoenix BIOS", | |
667 | .matches = { | |
0af40a4b | 668 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"), |
1e22436e IM |
669 | }, |
670 | }, | |
fc381519 | 671 | #endif |
a8b71a28 | 672 | {} |
5649b7c3 IM |
673 | }; |
674 | ||
1da177e4 LT |
675 | /* |
676 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
677 | * passed the efi memmap, systab, etc., so we should use these data structures | |
678 | * for initialization. Note, the efi init code path is determined by the | |
679 | * global efi_enabled. This allows the same kernel image to be used on existing | |
680 | * systems (with a traditional BIOS) as well as on EFI systems. | |
681 | */ | |
76934ed4 YL |
682 | /* |
683 | * setup_arch - architecture-specific boot-time initializations | |
684 | * | |
685 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
686 | */ | |
687 | ||
1da177e4 LT |
688 | void __init setup_arch(char **cmdline_p) |
689 | { | |
76934ed4 | 690 | #ifdef CONFIG_X86_32 |
1da177e4 | 691 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
3b33553b | 692 | visws_early_detect(); |
76934ed4 YL |
693 | #else |
694 | printk(KERN_INFO "Command line: %s\n", boot_command_line); | |
695 | #endif | |
1da177e4 | 696 | |
ae8d04e2 ZA |
697 | /* VMI may relocate the fixmap; do this before touching ioremap area */ |
698 | vmi_init(); | |
699 | ||
9e882c92 | 700 | early_cpu_init(); |
1a98fd14 JF |
701 | early_ioremap_init(); |
702 | ||
30c82645 PA |
703 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
704 | screen_info = boot_params.screen_info; | |
705 | edid_info = boot_params.edid_info; | |
76934ed4 | 706 | #ifdef CONFIG_X86_32 |
30c82645 PA |
707 | apm_info.bios = boot_params.apm_bios_info; |
708 | ist_info = boot_params.ist_info; | |
76934ed4 | 709 | if (boot_params.sys_desc_table.length != 0) { |
30c82645 PA |
710 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); |
711 | machine_id = boot_params.sys_desc_table.table[0]; | |
712 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
713 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 714 | } |
76934ed4 YL |
715 | #endif |
716 | saved_video_mode = boot_params.hdr.vid_mode; | |
30c82645 | 717 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
718 | |
719 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
720 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
721 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
722 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 723 | #endif |
7465252e YL |
724 | #ifdef CONFIG_EFI |
725 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
76934ed4 YL |
726 | #ifdef CONFIG_X86_32 |
727 | "EL32", | |
728 | #else | |
729 | "EL64", | |
730 | #endif | |
731 | 4)) { | |
7465252e YL |
732 | efi_enabled = 1; |
733 | efi_reserve_early(); | |
734 | } | |
735 | #endif | |
736 | ||
1da177e4 | 737 | ARCH_SETUP |
2215e69d | 738 | |
0dbfafa5 | 739 | setup_memory_map(); |
28bb2237 | 740 | parse_setup_data(); |
a0a0becd YL |
741 | /* update the e820_saved too */ |
742 | e820_reserve_setup_data(); | |
28bb2237 | 743 | |
1da177e4 LT |
744 | copy_edd(); |
745 | ||
30c82645 | 746 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
747 | root_mountflags &= ~MS_RDONLY; |
748 | init_mm.start_code = (unsigned long) _text; | |
749 | init_mm.end_code = (unsigned long) _etext; | |
750 | init_mm.end_data = (unsigned long) _edata; | |
93dbda7c | 751 | init_mm.brk = _brk_end; |
1da177e4 LT |
752 | |
753 | code_resource.start = virt_to_phys(_text); | |
754 | code_resource.end = virt_to_phys(_etext)-1; | |
755 | data_resource.start = virt_to_phys(_etext); | |
756 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
757 | bss_resource.start = virt_to_phys(&__bss_start); |
758 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 759 | |
516cbf37 TB |
760 | #ifdef CONFIG_CMDLINE_BOOL |
761 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
762 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
763 | #else | |
764 | if (builtin_cmdline[0]) { | |
765 | /* append boot loader cmdline to builtin */ | |
766 | strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); | |
767 | strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); | |
768 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
769 | } | |
770 | #endif | |
771 | #endif | |
772 | ||
9a2e5930 YL |
773 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
774 | *cmdline_p = command_line; | |
775 | ||
1a3f239d | 776 | parse_early_param(); |
1da177e4 | 777 | |
0ad5bce7 JF |
778 | #ifdef CONFIG_X86_64 |
779 | check_efer(); | |
780 | #endif | |
781 | ||
ae8d04e2 ZA |
782 | /* Must be before kernel pagetables are setup */ |
783 | vmi_activate(); | |
3a6ddd5f | 784 | |
28bb2237 | 785 | /* after early param, so could get panic from serial */ |
a0a0becd | 786 | reserve_early_setup_data(); |
28bb2237 | 787 | |
76934ed4 | 788 | if (acpi_mps_check()) { |
3eb11edc | 789 | #ifdef CONFIG_X86_LOCAL_APIC |
76934ed4 | 790 | disable_apic = 1; |
3eb11edc | 791 | #endif |
988781dc | 792 | setup_clear_cpu_cap(X86_FEATURE_APIC); |
3c999f14 YL |
793 | } |
794 | ||
dc7c65db LT |
795 | #ifdef CONFIG_PCI |
796 | if (pci_early_dump_regs) | |
797 | early_dump_pci_devices(); | |
798 | #endif | |
799 | ||
0dbfafa5 | 800 | finish_e820_parsing(); |
1a3f239d | 801 | |
ff0c0874 BM |
802 | if (efi_enabled) |
803 | efi_init(); | |
804 | ||
2216d199 YL |
805 | dmi_scan_machine(); |
806 | ||
807 | dmi_check_system(bad_bios_dmi_table); | |
808 | ||
88b094fb AK |
809 | /* |
810 | * VMware detection requires dmi to be available, so this | |
811 | * needs to be done after dmi_scan_machine, for the BP. | |
812 | */ | |
813 | init_hypervisor(&boot_cpu_data); | |
814 | ||
76934ed4 | 815 | #ifdef CONFIG_X86_32 |
41c094fd | 816 | probe_roms(); |
76934ed4 | 817 | #endif |
41c094fd YL |
818 | |
819 | /* after parse_early_param, so could debug it */ | |
820 | insert_resource(&iomem_resource, &code_resource); | |
821 | insert_resource(&iomem_resource, &data_resource); | |
822 | insert_resource(&iomem_resource, &bss_resource); | |
823 | ||
8b2cb7a8 | 824 | |
76934ed4 | 825 | #ifdef CONFIG_X86_32 |
cc9f7a0c YL |
826 | if (ppro_with_ram_bug()) { |
827 | e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, | |
828 | E820_RESERVED); | |
829 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
830 | printk(KERN_INFO "fixed physical RAM map:\n"); | |
831 | e820_print_map("bad_ppro"); | |
832 | } | |
76934ed4 YL |
833 | #else |
834 | early_gart_iommu_check(); | |
835 | #endif | |
cc9f7a0c | 836 | |
7b2a0a6c YL |
837 | /* |
838 | * partially used pages are not usable - thus | |
839 | * we are rounding upwards: | |
840 | */ | |
f361a450 | 841 | max_pfn = e820_end_of_ram_pfn(); |
7b2a0a6c | 842 | |
6780711e YL |
843 | /* preallocate 4k for mptable mpc */ |
844 | early_reserve_e820_mpc_new(); | |
093af8d7 YL |
845 | /* update e820 for memory not covered by WB MTRRs */ |
846 | mtrr_bp_init(); | |
2dc807b3 | 847 | if (mtrr_trim_uncached_memory(max_pfn)) |
f361a450 | 848 | max_pfn = e820_end_of_ram_pfn(); |
76c32418 | 849 | |
76934ed4 | 850 | #ifdef CONFIG_X86_32 |
4e29684c | 851 | /* max_low_pfn get updated here */ |
2ec65f8b | 852 | find_low_pfn_range(); |
76934ed4 YL |
853 | #else |
854 | num_physpages = max_pfn; | |
855 | ||
06cd9a7d | 856 | check_x2apic(); |
76934ed4 YL |
857 | |
858 | /* How many end-of-memory variables you have, grandma! */ | |
859 | /* need this before calling reserve_initrd */ | |
f361a450 YL |
860 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
861 | max_low_pfn = e820_end_of_low_ram_pfn(); | |
862 | else | |
863 | max_low_pfn = max_pfn; | |
864 | ||
76934ed4 YL |
865 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
866 | #endif | |
2ec65f8b | 867 | |
5394f80f JF |
868 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION |
869 | setup_bios_corruption_check(); | |
870 | #endif | |
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 | ||
1008 | /** | |
8e6dafd6 | 1009 | * x86_quirk_pre_intr_init - initialisation prior to setting up interrupt vectors |
9be1b56a IM |
1010 | * |
1011 | * Description: | |
1012 | * Perform any necessary interrupt initialisation prior to setting up | |
1013 | * the "ordinary" interrupt call gates. For legacy reasons, the ISA | |
1014 | * interrupts should be initialised here if the machine emulates a PC | |
1015 | * in any way. | |
1016 | **/ | |
8e6dafd6 | 1017 | void __init x86_quirk_pre_intr_init(void) |
9be1b56a IM |
1018 | { |
1019 | if (x86_quirks->arch_pre_intr_init) { | |
1020 | if (x86_quirks->arch_pre_intr_init()) | |
1021 | return; | |
1022 | } | |
1023 | init_ISA_irqs(); | |
1024 | } | |
1025 | ||
1026 | /** | |
8e6dafd6 | 1027 | * x86_quirk_intr_init - post gate setup interrupt initialisation |
9be1b56a IM |
1028 | * |
1029 | * Description: | |
1030 | * Fill in any interrupts that may have been left out by the general | |
1031 | * init_IRQ() routine. interrupts having to do with the machine rather | |
1032 | * than the devices on the I/O bus (like APIC interrupts in intel MP | |
1033 | * systems) are started here. | |
1034 | **/ | |
8e6dafd6 | 1035 | void __init x86_quirk_intr_init(void) |
9be1b56a IM |
1036 | { |
1037 | if (x86_quirks->arch_intr_init) { | |
1038 | if (x86_quirks->arch_intr_init()) | |
1039 | return; | |
1040 | } | |
1041 | } | |
1042 | ||
9be1b56a | 1043 | /** |
8e6dafd6 | 1044 | * x86_quirk_trap_init - initialise system specific traps |
9be1b56a IM |
1045 | * |
1046 | * Description: | |
1047 | * Called as the final act of trap_init(). Used in VISWS to initialise | |
1048 | * the various board specific APIC traps. | |
1049 | **/ | |
8e6dafd6 | 1050 | void __init x86_quirk_trap_init(void) |
9be1b56a IM |
1051 | { |
1052 | if (x86_quirks->arch_trap_init) { | |
1053 | if (x86_quirks->arch_trap_init()) | |
1054 | return; | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | static struct irqaction irq0 = { | |
1059 | .handler = timer_interrupt, | |
fc6fc7f1 | 1060 | .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER, |
9be1b56a IM |
1061 | .mask = CPU_MASK_NONE, |
1062 | .name = "timer" | |
1063 | }; | |
1064 | ||
1065 | /** | |
8e6dafd6 | 1066 | * x86_quirk_pre_time_init - do any specific initialisations before. |
9be1b56a IM |
1067 | * |
1068 | **/ | |
8e6dafd6 | 1069 | void __init x86_quirk_pre_time_init(void) |
9be1b56a IM |
1070 | { |
1071 | if (x86_quirks->arch_pre_time_init) | |
1072 | x86_quirks->arch_pre_time_init(); | |
1073 | } | |
1074 | ||
1075 | /** | |
8e6dafd6 | 1076 | * x86_quirk_time_init - do any specific initialisations for the system timer. |
9be1b56a IM |
1077 | * |
1078 | * Description: | |
1079 | * Must plug the system timer interrupt source at HZ into the IRQ listed | |
1080 | * in irq_vectors.h:TIMER_IRQ | |
1081 | **/ | |
8e6dafd6 | 1082 | void __init x86_quirk_time_init(void) |
9be1b56a IM |
1083 | { |
1084 | if (x86_quirks->arch_time_init) { | |
1085 | /* | |
1086 | * A nonzero return code does not mean failure, it means | |
1087 | * that the architecture quirk does not want any | |
1088 | * generic (timer) setup to be performed after this: | |
1089 | */ | |
1090 | if (x86_quirks->arch_time_init()) | |
1091 | return; | |
1092 | } | |
1093 | ||
1094 | irq0.mask = cpumask_of_cpu(0); | |
1095 | setup_irq(0, &irq0); | |
1096 | } | |
9be1b56a | 1097 | #endif /* CONFIG_X86_32 */ |