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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 | ||
796216a5 JF |
115 | RESERVE_BRK(dmi_alloc, 65536); |
116 | ||
c0b5842a IM |
117 | unsigned int boot_cpu_id __read_mostly; |
118 | ||
93dbda7c JF |
119 | static __initdata unsigned long _brk_start = (unsigned long)__brk_base; |
120 | unsigned long _brk_end = (unsigned long)__brk_base; | |
121 | ||
c0b5842a IM |
122 | #ifdef CONFIG_X86_64 |
123 | int default_cpu_present_to_apicid(int mps_cpu) | |
124 | { | |
125 | return __default_cpu_present_to_apicid(mps_cpu); | |
126 | } | |
127 | ||
128 | int default_check_phys_apicid_present(int boot_cpu_physical_apicid) | |
129 | { | |
130 | return __default_check_phys_apicid_present(boot_cpu_physical_apicid); | |
131 | } | |
132 | #endif | |
133 | ||
217b8ce8 YL |
134 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
135 | struct boot_params __initdata boot_params; | |
136 | #else | |
137 | struct boot_params boot_params; | |
138 | #endif | |
139 | ||
1da177e4 LT |
140 | /* |
141 | * Machine setup.. | |
142 | */ | |
c9cce83d BW |
143 | static struct resource data_resource = { |
144 | .name = "Kernel data", | |
145 | .start = 0, | |
146 | .end = 0, | |
147 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
148 | }; | |
149 | ||
150 | static struct resource code_resource = { | |
151 | .name = "Kernel code", | |
152 | .start = 0, | |
153 | .end = 0, | |
154 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
155 | }; | |
156 | ||
157 | static struct resource bss_resource = { | |
158 | .name = "Kernel bss", | |
159 | .start = 0, | |
160 | .end = 0, | |
161 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
162 | }; | |
163 | ||
7dea23ec YL |
164 | |
165 | #ifdef CONFIG_X86_32 | |
c9cce83d BW |
166 | static struct resource video_ram_resource = { |
167 | .name = "Video RAM area", | |
168 | .start = 0xa0000, | |
169 | .end = 0xbffff, | |
170 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
171 | }; | |
172 | ||
1da177e4 | 173 | /* cpu data as detected by the assembly code in head.S */ |
7dea23ec | 174 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
1da177e4 | 175 | /* common cpu data for all cpus */ |
7dea23ec | 176 | struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
129f6946 | 177 | EXPORT_SYMBOL(boot_cpu_data); |
7dea23ec YL |
178 | static void set_mca_bus(int x) |
179 | { | |
180 | #ifdef CONFIG_MCA | |
181 | MCA_bus = x; | |
182 | #endif | |
183 | } | |
1da177e4 | 184 | |
0c254e38 AS |
185 | unsigned int def_to_bigsmp; |
186 | ||
1da177e4 LT |
187 | /* for MCA, but anyone else can use it if they want */ |
188 | unsigned int machine_id; | |
189 | unsigned int machine_submodel_id; | |
190 | unsigned int BIOS_revision; | |
1da177e4 | 191 | |
7dea23ec YL |
192 | struct apm_info apm_info; |
193 | EXPORT_SYMBOL(apm_info); | |
194 | ||
195 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ | |
196 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
197 | struct ist_info ist_info; | |
198 | EXPORT_SYMBOL(ist_info); | |
199 | #else | |
200 | struct ist_info ist_info; | |
201 | #endif | |
202 | ||
203 | #else | |
ed26dbe5 JF |
204 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { |
205 | .x86_phys_bits = MAX_PHYSMEM_BITS, | |
206 | }; | |
7dea23ec YL |
207 | EXPORT_SYMBOL(boot_cpu_data); |
208 | #endif | |
209 | ||
210 | ||
211 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) | |
212 | unsigned long mmu_cr4_features; | |
213 | #else | |
214 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
215 | #endif | |
216 | ||
1da177e4 LT |
217 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
218 | int bootloader_type; | |
219 | ||
1da177e4 LT |
220 | /* |
221 | * Setup options | |
222 | */ | |
1da177e4 | 223 | struct screen_info screen_info; |
129f6946 | 224 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 225 | struct edid_info edid_info; |
5e518d76 | 226 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 227 | |
1da177e4 LT |
228 | extern int root_mountflags; |
229 | ||
e44b7b75 | 230 | unsigned long saved_video_mode; |
1da177e4 | 231 | |
cf8fa920 | 232 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 233 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 234 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 235 | |
4e498b66 | 236 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
516cbf37 TB |
237 | #ifdef CONFIG_CMDLINE_BOOL |
238 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
239 | #endif | |
1da177e4 | 240 | |
1da177e4 LT |
241 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
242 | struct edd edd; | |
243 | #ifdef CONFIG_EDD_MODULE | |
244 | EXPORT_SYMBOL(edd); | |
245 | #endif | |
246 | /** | |
247 | * copy_edd() - Copy the BIOS EDD information | |
248 | * from boot_params into a safe place. | |
249 | * | |
250 | */ | |
251 | static inline void copy_edd(void) | |
252 | { | |
30c82645 PA |
253 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
254 | sizeof(edd.mbr_signature)); | |
255 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
256 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
257 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
258 | } |
259 | #else | |
260 | static inline void copy_edd(void) | |
261 | { | |
262 | } | |
263 | #endif | |
264 | ||
5368a2be PA |
265 | void * __init extend_brk(size_t size, size_t align) |
266 | { | |
267 | size_t mask = align - 1; | |
268 | void *ret; | |
269 | ||
270 | BUG_ON(_brk_start == 0); | |
271 | BUG_ON(align & mask); | |
272 | ||
273 | _brk_end = (_brk_end + mask) & ~mask; | |
274 | BUG_ON((char *)(_brk_end + size) > __brk_limit); | |
275 | ||
276 | ret = (void *)_brk_end; | |
277 | _brk_end += size; | |
278 | ||
279 | memset(ret, 0, size); | |
280 | ||
281 | return ret; | |
282 | } | |
283 | ||
284 | static void __init reserve_brk(void) | |
285 | { | |
286 | if (_brk_end > _brk_start) | |
287 | reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK"); | |
288 | ||
289 | /* Mark brk area as locked down and no longer taking any | |
290 | new allocations */ | |
291 | _brk_start = 0; | |
292 | } | |
293 | ||
cf8fa920 PA |
294 | #ifdef CONFIG_BLK_DEV_INITRD |
295 | ||
eb1379cb | 296 | #ifdef CONFIG_X86_32 |
cf8fa920 | 297 | |
eb1379cb YL |
298 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) |
299 | static void __init relocate_initrd(void) | |
cf8fa920 | 300 | { |
eb1379cb | 301 | |
ba5b14cc YL |
302 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
303 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
ba5b14cc YL |
304 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; |
305 | u64 ramdisk_here; | |
eb1379cb YL |
306 | unsigned long slop, clen, mapaddr; |
307 | char *p, *q; | |
cf8fa920 PA |
308 | |
309 | /* We need to move the initrd down into lowmem */ | |
4e29684c YL |
310 | ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, |
311 | PAGE_SIZE); | |
cf8fa920 | 312 | |
3945e2c9 YL |
313 | if (ramdisk_here == -1ULL) |
314 | panic("Cannot find place for new RAMDISK of size %lld\n", | |
315 | ramdisk_size); | |
316 | ||
cf8fa920 PA |
317 | /* Note: this includes all the lowmem currently occupied by |
318 | the initrd, we rely on that fact to keep the data intact. */ | |
3945e2c9 | 319 | reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, |
ba5b14cc | 320 | "NEW RAMDISK"); |
cf8fa920 PA |
321 | initrd_start = ramdisk_here + PAGE_OFFSET; |
322 | initrd_end = initrd_start + ramdisk_size; | |
f0d43100 YL |
323 | printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", |
324 | ramdisk_here, ramdisk_here + ramdisk_size); | |
cf8fa920 | 325 | |
cf8fa920 PA |
326 | q = (char *)initrd_start; |
327 | ||
328 | /* Copy any lowmem portion of the initrd */ | |
329 | if (ramdisk_image < end_of_lowmem) { | |
330 | clen = end_of_lowmem - ramdisk_image; | |
331 | p = (char *)__va(ramdisk_image); | |
332 | memcpy(q, p, clen); | |
333 | q += clen; | |
334 | ramdisk_image += clen; | |
335 | ramdisk_size -= clen; | |
336 | } | |
337 | ||
338 | /* Copy the highmem portion of the initrd */ | |
339 | while (ramdisk_size) { | |
340 | slop = ramdisk_image & ~PAGE_MASK; | |
341 | clen = ramdisk_size; | |
342 | if (clen > MAX_MAP_CHUNK-slop) | |
343 | clen = MAX_MAP_CHUNK-slop; | |
344 | mapaddr = ramdisk_image & PAGE_MASK; | |
88b4c146 | 345 | p = early_memremap(mapaddr, clen+slop); |
cf8fa920 | 346 | memcpy(q, p+slop, clen); |
beacfaac | 347 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
348 | q += clen; |
349 | ramdisk_image += clen; | |
350 | ramdisk_size -= clen; | |
351 | } | |
a4c81cf6 | 352 | /* high pages is not converted by early_res_to_bootmem */ |
ba5b14cc YL |
353 | ramdisk_image = boot_params.hdr.ramdisk_image; |
354 | ramdisk_size = boot_params.hdr.ramdisk_size; | |
eb1379cb YL |
355 | printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" |
356 | " %08llx - %08llx\n", | |
ba5b14cc YL |
357 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
358 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
eb1379cb YL |
359 | } |
360 | #endif | |
9a27f5c5 | 361 | |
eb1379cb YL |
362 | static void __init reserve_initrd(void) |
363 | { | |
364 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; | |
365 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
366 | u64 ramdisk_end = ramdisk_image + ramdisk_size; | |
367 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
368 | ||
369 | if (!boot_params.hdr.type_of_loader || | |
370 | !ramdisk_image || !ramdisk_size) | |
371 | return; /* No initrd provided by bootloader */ | |
372 | ||
373 | initrd_start = 0; | |
374 | ||
375 | if (ramdisk_size >= (end_of_lowmem>>1)) { | |
376 | free_early(ramdisk_image, ramdisk_end); | |
377 | printk(KERN_ERR "initrd too large to handle, " | |
378 | "disabling initrd\n"); | |
379 | return; | |
380 | } | |
381 | ||
382 | printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, | |
383 | ramdisk_end); | |
384 | ||
385 | ||
386 | if (ramdisk_end <= end_of_lowmem) { | |
387 | /* All in lowmem, easy case */ | |
388 | /* | |
389 | * don't need to reserve again, already reserved early | |
390 | * in i386_start_kernel | |
391 | */ | |
392 | initrd_start = ramdisk_image + PAGE_OFFSET; | |
393 | initrd_end = initrd_start + ramdisk_size; | |
394 | return; | |
395 | } | |
396 | ||
397 | #ifdef CONFIG_X86_32 | |
398 | relocate_initrd(); | |
399 | #else | |
400 | printk(KERN_ERR "initrd extends beyond end of memory " | |
401 | "(0x%08llx > 0x%08llx)\ndisabling initrd\n", | |
402 | ramdisk_end, end_of_lowmem); | |
403 | initrd_start = 0; | |
404 | #endif | |
405 | free_early(ramdisk_image, ramdisk_end); | |
cf8fa920 | 406 | } |
225c37d7 | 407 | #else |
eb1379cb | 408 | static void __init reserve_initrd(void) |
225c37d7 YL |
409 | { |
410 | } | |
cf8fa920 PA |
411 | #endif /* CONFIG_BLK_DEV_INITRD */ |
412 | ||
29f784e3 | 413 | static void __init parse_setup_data(void) |
257b0fde YL |
414 | { |
415 | struct setup_data *data; | |
416 | u64 pa_data; | |
417 | ||
418 | if (boot_params.hdr.version < 0x0209) | |
419 | return; | |
420 | pa_data = boot_params.hdr.setup_data; | |
421 | while (pa_data) { | |
88b4c146 | 422 | data = early_memremap(pa_data, PAGE_SIZE); |
257b0fde YL |
423 | switch (data->type) { |
424 | case SETUP_E820_EXT: | |
425 | parse_e820_ext(data, pa_data); | |
426 | break; | |
427 | default: | |
428 | break; | |
429 | } | |
257b0fde YL |
430 | pa_data = data->next; |
431 | early_iounmap(data, PAGE_SIZE); | |
432 | } | |
433 | } | |
434 | ||
a0a0becd | 435 | static void __init e820_reserve_setup_data(void) |
28bb2237 YL |
436 | { |
437 | struct setup_data *data; | |
438 | u64 pa_data; | |
d9a81b44 | 439 | int found = 0; |
28bb2237 YL |
440 | |
441 | if (boot_params.hdr.version < 0x0209) | |
442 | return; | |
443 | pa_data = boot_params.hdr.setup_data; | |
444 | while (pa_data) { | |
88b4c146 | 445 | data = early_memremap(pa_data, sizeof(*data)); |
28bb2237 YL |
446 | e820_update_range(pa_data, sizeof(*data)+data->len, |
447 | E820_RAM, E820_RESERVED_KERN); | |
d9a81b44 | 448 | found = 1; |
28bb2237 YL |
449 | pa_data = data->next; |
450 | early_iounmap(data, sizeof(*data)); | |
451 | } | |
d9a81b44 YL |
452 | if (!found) |
453 | return; | |
454 | ||
28bb2237 | 455 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
a0a0becd | 456 | memcpy(&e820_saved, &e820, sizeof(struct e820map)); |
28bb2237 YL |
457 | printk(KERN_INFO "extended physical RAM map:\n"); |
458 | e820_print_map("reserve setup_data"); | |
459 | } | |
460 | ||
a0a0becd YL |
461 | static void __init reserve_early_setup_data(void) |
462 | { | |
463 | struct setup_data *data; | |
464 | u64 pa_data; | |
465 | char buf[32]; | |
466 | ||
467 | if (boot_params.hdr.version < 0x0209) | |
468 | return; | |
469 | pa_data = boot_params.hdr.setup_data; | |
470 | while (pa_data) { | |
88b4c146 | 471 | data = early_memremap(pa_data, sizeof(*data)); |
a0a0becd YL |
472 | sprintf(buf, "setup data %x", data->type); |
473 | reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); | |
474 | pa_data = data->next; | |
475 | early_iounmap(data, sizeof(*data)); | |
476 | } | |
477 | } | |
478 | ||
ccb4defa YL |
479 | /* |
480 | * --------- Crashkernel reservation ------------------------------ | |
481 | */ | |
482 | ||
483 | #ifdef CONFIG_KEXEC | |
32105f7f BW |
484 | |
485 | /** | |
486 | * Reserve @size bytes of crashkernel memory at any suitable offset. | |
487 | * | |
488 | * @size: Size of the crashkernel memory to reserve. | |
489 | * Returns the base address on success, and -1ULL on failure. | |
490 | */ | |
a9b43c7d | 491 | static |
6b356022 | 492 | unsigned long long __init find_and_reserve_crashkernel(unsigned long long size) |
32105f7f BW |
493 | { |
494 | const unsigned long long alignment = 16<<20; /* 16M */ | |
495 | unsigned long long start = 0LL; | |
496 | ||
497 | while (1) { | |
498 | int ret; | |
499 | ||
500 | start = find_e820_area(start, ULONG_MAX, size, alignment); | |
501 | if (start == -1ULL) | |
502 | return start; | |
503 | ||
504 | /* try to reserve it */ | |
505 | ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE); | |
506 | if (ret >= 0) | |
507 | return start; | |
508 | ||
509 | start += alignment; | |
510 | } | |
511 | } | |
512 | ||
ccb4defa YL |
513 | static inline unsigned long long get_total_mem(void) |
514 | { | |
515 | unsigned long long total; | |
516 | ||
517 | total = max_low_pfn - min_low_pfn; | |
518 | #ifdef CONFIG_HIGHMEM | |
519 | total += highend_pfn - highstart_pfn; | |
520 | #endif | |
521 | ||
522 | return total << PAGE_SHIFT; | |
523 | } | |
524 | ||
29f784e3 | 525 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
526 | { |
527 | unsigned long long total_mem; | |
528 | unsigned long long crash_size, crash_base; | |
529 | int ret; | |
530 | ||
531 | total_mem = get_total_mem(); | |
532 | ||
533 | ret = parse_crashkernel(boot_command_line, total_mem, | |
534 | &crash_size, &crash_base); | |
32105f7f BW |
535 | if (ret != 0 || crash_size <= 0) |
536 | return; | |
537 | ||
538 | /* 0 means: find the address automatically */ | |
539 | if (crash_base <= 0) { | |
540 | crash_base = find_and_reserve_crashkernel(crash_size); | |
541 | if (crash_base == -1ULL) { | |
542 | pr_info("crashkernel reservation failed. " | |
543 | "No suitable area found.\n"); | |
ccb4defa YL |
544 | return; |
545 | } | |
32105f7f BW |
546 | } else { |
547 | ret = reserve_bootmem_generic(crash_base, crash_size, | |
548 | BOOTMEM_EXCLUSIVE); | |
549 | if (ret < 0) { | |
550 | pr_info("crashkernel reservation failed - " | |
551 | "memory is in use\n"); | |
ccb4defa YL |
552 | return; |
553 | } | |
32105f7f | 554 | } |
ccb4defa | 555 | |
32105f7f BW |
556 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " |
557 | "for crashkernel (System RAM: %ldMB)\n", | |
558 | (unsigned long)(crash_size >> 20), | |
559 | (unsigned long)(crash_base >> 20), | |
560 | (unsigned long)(total_mem >> 20)); | |
ccb4defa | 561 | |
32105f7f BW |
562 | crashk_res.start = crash_base; |
563 | crashk_res.end = crash_base + crash_size - 1; | |
564 | insert_resource(&iomem_resource, &crashk_res); | |
ccb4defa YL |
565 | } |
566 | #else | |
29f784e3 | 567 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
568 | { |
569 | } | |
570 | #endif | |
571 | ||
bdba0e70 YL |
572 | static struct resource standard_io_resources[] = { |
573 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
574 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
575 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
576 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
577 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
578 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
579 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
580 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
581 | { .name = "keyboard", .start = 0x60, .end = 0x60, | |
582 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
583 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
584 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
585 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
586 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
587 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
588 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
589 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
590 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
591 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
592 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
593 | }; | |
594 | ||
29f784e3 | 595 | static void __init reserve_standard_io_resources(void) |
bdba0e70 YL |
596 | { |
597 | int i; | |
598 | ||
599 | /* request I/O space for devices used on all i[345]86 PCs */ | |
600 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
601 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
602 | ||
603 | } | |
604 | ||
57cac4d1 VG |
605 | /* |
606 | * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by | |
607 | * is_kdump_kernel() to determine if we are booting after a panic. Hence | |
608 | * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. | |
609 | */ | |
610 | ||
611 | #ifdef CONFIG_CRASH_DUMP | |
0196bcbb YL |
612 | /* elfcorehdr= specifies the location of elf core header |
613 | * stored by the crashed kernel. This option will be passed | |
614 | * by kexec loader to the capture kernel. | |
615 | */ | |
616 | static int __init setup_elfcorehdr(char *arg) | |
617 | { | |
618 | char *end; | |
619 | if (!arg) | |
620 | return -EINVAL; | |
621 | elfcorehdr_addr = memparse(arg, &end); | |
622 | return end > arg ? 0 : -EINVAL; | |
623 | } | |
624 | early_param("elfcorehdr", setup_elfcorehdr); | |
625 | #endif | |
626 | ||
2b6163bf | 627 | static struct x86_quirks default_x86_quirks __initdata; |
9f077871 | 628 | |
3c9cb6de | 629 | struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; |
5394f80f | 630 | |
bb557460 | 631 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
5649b7c3 IM |
632 | static int __init dmi_low_memory_corruption(const struct dmi_system_id *d) |
633 | { | |
634 | printk(KERN_NOTICE | |
45608399 | 635 | "%s detected: BIOS may corrupt low RAM, working around it.\n", |
5649b7c3 IM |
636 | d->ident); |
637 | ||
2216d199 YL |
638 | e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED); |
639 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
5649b7c3 IM |
640 | |
641 | return 0; | |
642 | } | |
bb557460 | 643 | #endif |
5649b7c3 IM |
644 | |
645 | /* List of systems that have known low memory corruption BIOS problems */ | |
646 | static struct dmi_system_id __initdata bad_bios_dmi_table[] = { | |
fc381519 | 647 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
5649b7c3 IM |
648 | { |
649 | .callback = dmi_low_memory_corruption, | |
650 | .ident = "AMI BIOS", | |
651 | .matches = { | |
652 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), | |
653 | }, | |
654 | }, | |
1e22436e IM |
655 | { |
656 | .callback = dmi_low_memory_corruption, | |
657 | .ident = "Phoenix BIOS", | |
658 | .matches = { | |
0af40a4b | 659 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"), |
1e22436e IM |
660 | }, |
661 | }, | |
fc381519 | 662 | #endif |
a8b71a28 | 663 | {} |
5649b7c3 IM |
664 | }; |
665 | ||
1da177e4 LT |
666 | /* |
667 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
668 | * passed the efi memmap, systab, etc., so we should use these data structures | |
669 | * for initialization. Note, the efi init code path is determined by the | |
670 | * global efi_enabled. This allows the same kernel image to be used on existing | |
671 | * systems (with a traditional BIOS) as well as on EFI systems. | |
672 | */ | |
76934ed4 YL |
673 | /* |
674 | * setup_arch - architecture-specific boot-time initializations | |
675 | * | |
676 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
677 | */ | |
678 | ||
1da177e4 LT |
679 | void __init setup_arch(char **cmdline_p) |
680 | { | |
76934ed4 | 681 | #ifdef CONFIG_X86_32 |
1da177e4 | 682 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
3b33553b | 683 | visws_early_detect(); |
76934ed4 YL |
684 | #else |
685 | printk(KERN_INFO "Command line: %s\n", boot_command_line); | |
686 | #endif | |
1da177e4 | 687 | |
ae8d04e2 ZA |
688 | /* VMI may relocate the fixmap; do this before touching ioremap area */ |
689 | vmi_init(); | |
690 | ||
9e882c92 | 691 | early_cpu_init(); |
1a98fd14 JF |
692 | early_ioremap_init(); |
693 | ||
30c82645 PA |
694 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
695 | screen_info = boot_params.screen_info; | |
696 | edid_info = boot_params.edid_info; | |
76934ed4 | 697 | #ifdef CONFIG_X86_32 |
30c82645 PA |
698 | apm_info.bios = boot_params.apm_bios_info; |
699 | ist_info = boot_params.ist_info; | |
76934ed4 | 700 | if (boot_params.sys_desc_table.length != 0) { |
30c82645 PA |
701 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); |
702 | machine_id = boot_params.sys_desc_table.table[0]; | |
703 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
704 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 705 | } |
76934ed4 YL |
706 | #endif |
707 | saved_video_mode = boot_params.hdr.vid_mode; | |
30c82645 | 708 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
709 | |
710 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
711 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
712 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
713 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 714 | #endif |
7465252e YL |
715 | #ifdef CONFIG_EFI |
716 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
76934ed4 YL |
717 | #ifdef CONFIG_X86_32 |
718 | "EL32", | |
719 | #else | |
720 | "EL64", | |
721 | #endif | |
722 | 4)) { | |
7465252e YL |
723 | efi_enabled = 1; |
724 | efi_reserve_early(); | |
725 | } | |
726 | #endif | |
727 | ||
1da177e4 | 728 | ARCH_SETUP |
2215e69d | 729 | |
0dbfafa5 | 730 | setup_memory_map(); |
28bb2237 | 731 | parse_setup_data(); |
a0a0becd YL |
732 | /* update the e820_saved too */ |
733 | e820_reserve_setup_data(); | |
28bb2237 | 734 | |
1da177e4 LT |
735 | copy_edd(); |
736 | ||
30c82645 | 737 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
738 | root_mountflags &= ~MS_RDONLY; |
739 | init_mm.start_code = (unsigned long) _text; | |
740 | init_mm.end_code = (unsigned long) _etext; | |
741 | init_mm.end_data = (unsigned long) _edata; | |
93dbda7c | 742 | init_mm.brk = _brk_end; |
1da177e4 LT |
743 | |
744 | code_resource.start = virt_to_phys(_text); | |
745 | code_resource.end = virt_to_phys(_etext)-1; | |
746 | data_resource.start = virt_to_phys(_etext); | |
747 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
748 | bss_resource.start = virt_to_phys(&__bss_start); |
749 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 750 | |
516cbf37 TB |
751 | #ifdef CONFIG_CMDLINE_BOOL |
752 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
753 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
754 | #else | |
755 | if (builtin_cmdline[0]) { | |
756 | /* append boot loader cmdline to builtin */ | |
757 | strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); | |
758 | strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); | |
759 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
760 | } | |
761 | #endif | |
762 | #endif | |
763 | ||
9a2e5930 YL |
764 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
765 | *cmdline_p = command_line; | |
766 | ||
1a3f239d | 767 | parse_early_param(); |
1da177e4 | 768 | |
0ad5bce7 JF |
769 | #ifdef CONFIG_X86_64 |
770 | check_efer(); | |
771 | #endif | |
772 | ||
ae8d04e2 ZA |
773 | /* Must be before kernel pagetables are setup */ |
774 | vmi_activate(); | |
3a6ddd5f | 775 | |
28bb2237 | 776 | /* after early param, so could get panic from serial */ |
a0a0becd | 777 | reserve_early_setup_data(); |
28bb2237 | 778 | |
76934ed4 | 779 | if (acpi_mps_check()) { |
3eb11edc | 780 | #ifdef CONFIG_X86_LOCAL_APIC |
76934ed4 | 781 | disable_apic = 1; |
3eb11edc | 782 | #endif |
988781dc | 783 | setup_clear_cpu_cap(X86_FEATURE_APIC); |
3c999f14 YL |
784 | } |
785 | ||
dc7c65db LT |
786 | #ifdef CONFIG_PCI |
787 | if (pci_early_dump_regs) | |
788 | early_dump_pci_devices(); | |
789 | #endif | |
790 | ||
0dbfafa5 | 791 | finish_e820_parsing(); |
1a3f239d | 792 | |
ff0c0874 BM |
793 | if (efi_enabled) |
794 | efi_init(); | |
795 | ||
2216d199 YL |
796 | dmi_scan_machine(); |
797 | ||
798 | dmi_check_system(bad_bios_dmi_table); | |
799 | ||
88b094fb AK |
800 | /* |
801 | * VMware detection requires dmi to be available, so this | |
802 | * needs to be done after dmi_scan_machine, for the BP. | |
803 | */ | |
804 | init_hypervisor(&boot_cpu_data); | |
805 | ||
76934ed4 | 806 | #ifdef CONFIG_X86_32 |
41c094fd | 807 | probe_roms(); |
76934ed4 | 808 | #endif |
41c094fd YL |
809 | |
810 | /* after parse_early_param, so could debug it */ | |
811 | insert_resource(&iomem_resource, &code_resource); | |
812 | insert_resource(&iomem_resource, &data_resource); | |
813 | insert_resource(&iomem_resource, &bss_resource); | |
814 | ||
8b2cb7a8 | 815 | |
76934ed4 | 816 | #ifdef CONFIG_X86_32 |
cc9f7a0c YL |
817 | if (ppro_with_ram_bug()) { |
818 | e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, | |
819 | E820_RESERVED); | |
820 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
821 | printk(KERN_INFO "fixed physical RAM map:\n"); | |
822 | e820_print_map("bad_ppro"); | |
823 | } | |
76934ed4 YL |
824 | #else |
825 | early_gart_iommu_check(); | |
826 | #endif | |
cc9f7a0c | 827 | |
7b2a0a6c YL |
828 | /* |
829 | * partially used pages are not usable - thus | |
830 | * we are rounding upwards: | |
831 | */ | |
f361a450 | 832 | max_pfn = e820_end_of_ram_pfn(); |
7b2a0a6c | 833 | |
6780711e YL |
834 | /* preallocate 4k for mptable mpc */ |
835 | early_reserve_e820_mpc_new(); | |
093af8d7 YL |
836 | /* update e820 for memory not covered by WB MTRRs */ |
837 | mtrr_bp_init(); | |
2dc807b3 | 838 | if (mtrr_trim_uncached_memory(max_pfn)) |
f361a450 | 839 | max_pfn = e820_end_of_ram_pfn(); |
76c32418 | 840 | |
76934ed4 | 841 | #ifdef CONFIG_X86_32 |
4e29684c | 842 | /* max_low_pfn get updated here */ |
2ec65f8b | 843 | find_low_pfn_range(); |
76934ed4 YL |
844 | #else |
845 | num_physpages = max_pfn; | |
846 | ||
06cd9a7d | 847 | check_x2apic(); |
76934ed4 YL |
848 | |
849 | /* How many end-of-memory variables you have, grandma! */ | |
850 | /* need this before calling reserve_initrd */ | |
f361a450 YL |
851 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
852 | max_low_pfn = e820_end_of_low_ram_pfn(); | |
853 | else | |
854 | max_low_pfn = max_pfn; | |
855 | ||
76934ed4 YL |
856 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
857 | #endif | |
2ec65f8b | 858 | |
5394f80f JF |
859 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION |
860 | setup_bios_corruption_check(); | |
861 | #endif | |
862 | ||
93dbda7c JF |
863 | reserve_brk(); |
864 | ||
4e29684c | 865 | /* max_pfn_mapped is updated here */ |
f361a450 YL |
866 | max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); |
867 | max_pfn_mapped = max_low_pfn_mapped; | |
868 | ||
869 | #ifdef CONFIG_X86_64 | |
870 | if (max_pfn > max_low_pfn) { | |
871 | max_pfn_mapped = init_memory_mapping(1UL<<32, | |
872 | max_pfn<<PAGE_SHIFT); | |
873 | /* can we preseve max_low_pfn ?*/ | |
874 | max_low_pfn = max_pfn; | |
875 | } | |
876 | #endif | |
4e29684c | 877 | |
e7b37895 YL |
878 | /* |
879 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
880 | */ | |
881 | ||
882 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
883 | if (init_ohci1394_dma_early) | |
884 | init_ohci1394_dma_on_all_controllers(); | |
885 | #endif | |
886 | ||
2ec65f8b YL |
887 | reserve_initrd(); |
888 | ||
76934ed4 | 889 | vsmp_init(); |
76934ed4 | 890 | |
1c6e5503 YL |
891 | io_delay_init(); |
892 | ||
1c6e5503 YL |
893 | /* |
894 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
895 | */ | |
896 | acpi_boot_table_init(); | |
1c6e5503 | 897 | |
2e42060c JS |
898 | early_acpi_boot_init(); |
899 | ||
1c6e5503 | 900 | #ifdef CONFIG_ACPI_NUMA |
f2f865fe YL |
901 | /* |
902 | * Parse SRAT to discover nodes. | |
903 | */ | |
904 | acpi_numa_init(); | |
1c6e5503 YL |
905 | #endif |
906 | ||
2ec65f8b | 907 | initmem_init(0, max_pfn); |
093af8d7 | 908 | |
593a0cc3 YL |
909 | #ifdef CONFIG_ACPI_SLEEP |
910 | /* | |
911 | * Reserve low memory region for sleep support. | |
912 | */ | |
913 | acpi_reserve_bootmem(); | |
914 | #endif | |
593a0cc3 YL |
915 | /* |
916 | * Find and reserve possible boot-time SMP configuration: | |
917 | */ | |
918 | find_smp_config(); | |
550fe4f1 | 919 | |
593a0cc3 YL |
920 | reserve_crashkernel(); |
921 | ||
91467bdf BW |
922 | #ifdef CONFIG_X86_64 |
923 | /* | |
924 | * dma32_reserve_bootmem() allocates bootmem which may conflict | |
925 | * with the crashkernel command line, so do that after | |
926 | * reserve_crashkernel() | |
927 | */ | |
928 | dma32_reserve_bootmem(); | |
929 | #endif | |
930 | ||
593a0cc3 YL |
931 | reserve_ibft_region(); |
932 | ||
790c73f6 GOC |
933 | #ifdef CONFIG_KVM_CLOCK |
934 | kvmclock_init(); | |
935 | #endif | |
936 | ||
a312b37b | 937 | paravirt_pagetable_setup_start(swapper_pg_dir); |
1da177e4 | 938 | paging_init(); |
a312b37b | 939 | paravirt_pagetable_setup_done(swapper_pg_dir); |
c1f2f09e | 940 | paravirt_post_allocator_init(); |
f212ec4b | 941 | |
76934ed4 YL |
942 | #ifdef CONFIG_X86_64 |
943 | map_vsyscall(); | |
944 | #endif | |
945 | ||
1a3f239d | 946 | generic_apic_probe(); |
1da177e4 | 947 | |
54ef3400 | 948 | early_quirks(); |
d44647b0 | 949 | |
295deae4 YL |
950 | /* |
951 | * Read APIC and some other early information from ACPI tables. | |
952 | */ | |
1da177e4 | 953 | acpi_boot_init(); |
04606618 | 954 | |
e0da3364 | 955 | #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS) |
295deae4 YL |
956 | /* |
957 | * get boot-time SMP configuration: | |
958 | */ | |
e0da3364 YL |
959 | if (smp_found_config) |
960 | get_smp_config(); | |
961 | #endif | |
76934ed4 | 962 | |
329513a3 | 963 | prefill_possible_map(); |
301e6190 | 964 | |
5f4765f9 YL |
965 | #ifdef CONFIG_X86_64 |
966 | init_cpu_to_node(); | |
967 | #endif | |
968 | ||
76934ed4 YL |
969 | init_apic_mappings(); |
970 | ioapic_init_mappings(); | |
f3294a33 | 971 | |
9d6a4d08 | 972 | /* need to wait for io_apic is mapped */ |
be5d5350 | 973 | probe_nr_irqs_gsi(); |
9d6a4d08 | 974 | |
295deae4 | 975 | kvm_guest_init(); |
1da177e4 | 976 | |
41c094fd | 977 | e820_reserve_resources(); |
bf62f398 | 978 | e820_mark_nosave_regions(max_low_pfn); |
1da177e4 | 979 | |
76934ed4 | 980 | #ifdef CONFIG_X86_32 |
41c094fd | 981 | request_resource(&iomem_resource, &video_ram_resource); |
76934ed4 | 982 | #endif |
ce97c40e | 983 | reserve_standard_io_resources(); |
41c094fd YL |
984 | |
985 | e820_setup_gap(); | |
986 | ||
1da177e4 LT |
987 | #ifdef CONFIG_VT |
988 | #if defined(CONFIG_VGA_CONSOLE) | |
989 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
990 | conswitchp = &vga_con; | |
991 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
992 | conswitchp = &dummy_con; | |
993 | #endif | |
994 | #endif | |
995 | } | |
5649b7c3 | 996 | |
9be1b56a IM |
997 | #ifdef CONFIG_X86_32 |
998 | ||
999 | /** | |
8e6dafd6 | 1000 | * x86_quirk_pre_intr_init - initialisation prior to setting up interrupt vectors |
9be1b56a IM |
1001 | * |
1002 | * Description: | |
1003 | * Perform any necessary interrupt initialisation prior to setting up | |
1004 | * the "ordinary" interrupt call gates. For legacy reasons, the ISA | |
1005 | * interrupts should be initialised here if the machine emulates a PC | |
1006 | * in any way. | |
1007 | **/ | |
8e6dafd6 | 1008 | void __init x86_quirk_pre_intr_init(void) |
9be1b56a IM |
1009 | { |
1010 | if (x86_quirks->arch_pre_intr_init) { | |
1011 | if (x86_quirks->arch_pre_intr_init()) | |
1012 | return; | |
1013 | } | |
1014 | init_ISA_irqs(); | |
1015 | } | |
1016 | ||
1017 | /** | |
8e6dafd6 | 1018 | * x86_quirk_intr_init - post gate setup interrupt initialisation |
9be1b56a IM |
1019 | * |
1020 | * Description: | |
1021 | * Fill in any interrupts that may have been left out by the general | |
1022 | * init_IRQ() routine. interrupts having to do with the machine rather | |
1023 | * than the devices on the I/O bus (like APIC interrupts in intel MP | |
1024 | * systems) are started here. | |
1025 | **/ | |
8e6dafd6 | 1026 | void __init x86_quirk_intr_init(void) |
9be1b56a IM |
1027 | { |
1028 | if (x86_quirks->arch_intr_init) { | |
1029 | if (x86_quirks->arch_intr_init()) | |
1030 | return; | |
1031 | } | |
1032 | } | |
1033 | ||
9be1b56a | 1034 | /** |
8e6dafd6 | 1035 | * x86_quirk_trap_init - initialise system specific traps |
9be1b56a IM |
1036 | * |
1037 | * Description: | |
1038 | * Called as the final act of trap_init(). Used in VISWS to initialise | |
1039 | * the various board specific APIC traps. | |
1040 | **/ | |
8e6dafd6 | 1041 | void __init x86_quirk_trap_init(void) |
9be1b56a IM |
1042 | { |
1043 | if (x86_quirks->arch_trap_init) { | |
1044 | if (x86_quirks->arch_trap_init()) | |
1045 | return; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | static struct irqaction irq0 = { | |
1050 | .handler = timer_interrupt, | |
fc6fc7f1 | 1051 | .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER, |
9be1b56a IM |
1052 | .name = "timer" |
1053 | }; | |
1054 | ||
1055 | /** | |
8e6dafd6 | 1056 | * x86_quirk_pre_time_init - do any specific initialisations before. |
9be1b56a IM |
1057 | * |
1058 | **/ | |
8e6dafd6 | 1059 | void __init x86_quirk_pre_time_init(void) |
9be1b56a IM |
1060 | { |
1061 | if (x86_quirks->arch_pre_time_init) | |
1062 | x86_quirks->arch_pre_time_init(); | |
1063 | } | |
1064 | ||
1065 | /** | |
8e6dafd6 | 1066 | * x86_quirk_time_init - do any specific initialisations for the system timer. |
9be1b56a IM |
1067 | * |
1068 | * Description: | |
1069 | * Must plug the system timer interrupt source at HZ into the IRQ listed | |
1070 | * in irq_vectors.h:TIMER_IRQ | |
1071 | **/ | |
8e6dafd6 | 1072 | void __init x86_quirk_time_init(void) |
9be1b56a IM |
1073 | { |
1074 | if (x86_quirks->arch_time_init) { | |
1075 | /* | |
1076 | * A nonzero return code does not mean failure, it means | |
1077 | * that the architecture quirk does not want any | |
1078 | * generic (timer) setup to be performed after this: | |
1079 | */ | |
1080 | if (x86_quirks->arch_time_init()) | |
1081 | return; | |
1082 | } | |
1083 | ||
1084 | irq0.mask = cpumask_of_cpu(0); | |
1085 | setup_irq(0, &irq0); | |
1086 | } | |
9be1b56a | 1087 | #endif /* CONFIG_X86_32 */ |