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1da177e4 LT |
1 | /* |
2 | * linux/arch/i386/kernel/setup.c | |
3 | * | |
4 | * Copyright (C) 1995 Linus Torvalds | |
5 | * | |
6 | * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 | |
7 | * | |
8 | * Memory region support | |
9 | * David Parsons <orc@pell.chi.il.us>, July-August 1999 | |
10 | * | |
11 | * Added E820 sanitization routine (removes overlapping memory regions); | |
12 | * Brian Moyle <bmoyle@mvista.com>, February 2001 | |
13 | * | |
14 | * Moved CPU detection code to cpu/${cpu}.c | |
15 | * Patrick Mochel <mochel@osdl.org>, March 2002 | |
16 | * | |
17 | * Provisions for empty E820 memory regions (reported by certain BIOSes). | |
18 | * Alex Achenbach <xela@slit.de>, December 2002. | |
19 | * | |
20 | */ | |
21 | ||
22 | /* | |
23 | * This file handles the architecture-dependent parts of initialization | |
24 | */ | |
25 | ||
26 | #include <linux/sched.h> | |
27 | #include <linux/mm.h> | |
05b79bdc | 28 | #include <linux/mmzone.h> |
894673ee | 29 | #include <linux/screen_info.h> |
1da177e4 LT |
30 | #include <linux/ioport.h> |
31 | #include <linux/acpi.h> | |
32 | #include <linux/apm_bios.h> | |
33 | #include <linux/initrd.h> | |
34 | #include <linux/bootmem.h> | |
35 | #include <linux/seq_file.h> | |
e5c6c8e4 | 36 | #include <linux/platform_device.h> |
1da177e4 LT |
37 | #include <linux/console.h> |
38 | #include <linux/mca.h> | |
39 | #include <linux/root_dev.h> | |
40 | #include <linux/highmem.h> | |
41 | #include <linux/module.h> | |
42 | #include <linux/efi.h> | |
43 | #include <linux/init.h> | |
44 | #include <linux/edd.h> | |
45 | #include <linux/nodemask.h> | |
1bc3b91a | 46 | #include <linux/kexec.h> |
2030eae5 | 47 | #include <linux/crash_dump.h> |
e9928674 | 48 | #include <linux/dmi.h> |
22a9835c | 49 | #include <linux/pfn.h> |
1bc3b91a | 50 | |
1da177e4 | 51 | #include <video/edid.h> |
1bc3b91a | 52 | |
9635b47d | 53 | #include <asm/apic.h> |
1da177e4 LT |
54 | #include <asm/e820.h> |
55 | #include <asm/mpspec.h> | |
91023300 | 56 | #include <asm/mmzone.h> |
1da177e4 LT |
57 | #include <asm/setup.h> |
58 | #include <asm/arch_hooks.h> | |
59 | #include <asm/sections.h> | |
60 | #include <asm/io_apic.h> | |
61 | #include <asm/ist.h> | |
62 | #include <asm/io.h> | |
e75eac33 | 63 | #include <setup_arch.h> |
1da177e4 LT |
64 | #include <bios_ebda.h> |
65 | ||
66 | /* This value is set up by the early boot code to point to the value | |
67 | immediately after the boot time page tables. It contains a *physical* | |
68 | address, and must not be in the .bss segment! */ | |
69 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
70 | ||
0bb3184d | 71 | int disable_pse __devinitdata = 0; |
1da177e4 LT |
72 | |
73 | /* | |
74 | * Machine setup.. | |
75 | */ | |
269c2d81 | 76 | extern struct resource code_resource; |
77 | extern struct resource data_resource; | |
1da177e4 LT |
78 | |
79 | /* cpu data as detected by the assembly code in head.S */ | |
80 | struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; | |
81 | /* common cpu data for all cpus */ | |
c3d8c141 | 82 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
129f6946 | 83 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 LT |
84 | |
85 | unsigned long mmu_cr4_features; | |
86 | ||
1da177e4 LT |
87 | /* for MCA, but anyone else can use it if they want */ |
88 | unsigned int machine_id; | |
129f6946 AD |
89 | #ifdef CONFIG_MCA |
90 | EXPORT_SYMBOL(machine_id); | |
91 | #endif | |
1da177e4 LT |
92 | unsigned int machine_submodel_id; |
93 | unsigned int BIOS_revision; | |
94 | unsigned int mca_pentium_flag; | |
95 | ||
1da177e4 LT |
96 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
97 | int bootloader_type; | |
98 | ||
99 | /* user-defined highmem size */ | |
100 | static unsigned int highmem_pages = -1; | |
101 | ||
102 | /* | |
103 | * Setup options | |
104 | */ | |
105 | struct drive_info_struct { char dummy[32]; } drive_info; | |
129f6946 AD |
106 | #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || \ |
107 | defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE) | |
108 | EXPORT_SYMBOL(drive_info); | |
109 | #endif | |
1da177e4 | 110 | struct screen_info screen_info; |
129f6946 | 111 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 112 | struct apm_info apm_info; |
129f6946 | 113 | EXPORT_SYMBOL(apm_info); |
1da177e4 LT |
114 | struct sys_desc_table_struct { |
115 | unsigned short length; | |
116 | unsigned char table[0]; | |
117 | }; | |
118 | struct edid_info edid_info; | |
5e518d76 | 119 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 120 | struct ist_info ist_info; |
129f6946 AD |
121 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
122 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
123 | EXPORT_SYMBOL(ist_info); | |
124 | #endif | |
1da177e4 LT |
125 | |
126 | extern void early_cpu_init(void); | |
1da177e4 LT |
127 | extern int root_mountflags; |
128 | ||
129 | unsigned long saved_videomode; | |
130 | ||
131 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
132 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
133 | #define RAMDISK_LOAD_FLAG 0x4000 | |
134 | ||
135 | static char command_line[COMMAND_LINE_SIZE]; | |
136 | ||
137 | unsigned char __initdata boot_params[PARAM_SIZE]; | |
138 | ||
1da177e4 LT |
139 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
140 | struct edd edd; | |
141 | #ifdef CONFIG_EDD_MODULE | |
142 | EXPORT_SYMBOL(edd); | |
143 | #endif | |
144 | /** | |
145 | * copy_edd() - Copy the BIOS EDD information | |
146 | * from boot_params into a safe place. | |
147 | * | |
148 | */ | |
149 | static inline void copy_edd(void) | |
150 | { | |
151 | memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature)); | |
152 | memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info)); | |
153 | edd.mbr_signature_nr = EDD_MBR_SIG_NR; | |
154 | edd.edd_info_nr = EDD_NR; | |
155 | } | |
156 | #else | |
157 | static inline void copy_edd(void) | |
158 | { | |
159 | } | |
160 | #endif | |
161 | ||
cef518e8 | 162 | int __initdata user_defined_memmap = 0; |
1da177e4 | 163 | |
1a3f239d RR |
164 | /* |
165 | * "mem=nopentium" disables the 4MB page tables. | |
166 | * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM | |
167 | * to <mem>, overriding the bios size. | |
168 | * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from | |
169 | * <start> to <start>+<mem>, overriding the bios size. | |
170 | * | |
171 | * HPA tells me bootloaders need to parse mem=, so no new | |
172 | * option should be mem= [also see Documentation/i386/boot.txt] | |
173 | */ | |
174 | static int __init parse_mem(char *arg) | |
175 | { | |
176 | if (!arg) | |
177 | return -EINVAL; | |
1da177e4 | 178 | |
1a3f239d RR |
179 | if (strcmp(arg, "nopentium") == 0) { |
180 | clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability); | |
181 | disable_pse = 1; | |
182 | } else { | |
183 | /* If the user specifies memory size, we | |
184 | * limit the BIOS-provided memory map to | |
185 | * that size. exactmap can be used to specify | |
186 | * the exact map. mem=number can be used to | |
187 | * trim the existing memory map. | |
1da177e4 | 188 | */ |
1a3f239d | 189 | unsigned long long mem_size; |
1da177e4 | 190 | |
1a3f239d RR |
191 | mem_size = memparse(arg, &arg); |
192 | limit_regions(mem_size); | |
193 | user_defined_memmap = 1; | |
194 | } | |
195 | return 0; | |
196 | } | |
197 | early_param("mem", parse_mem); | |
1da177e4 | 198 | |
1a3f239d RR |
199 | #ifdef CONFIG_PROC_VMCORE |
200 | /* elfcorehdr= specifies the location of elf core header | |
201 | * stored by the crashed kernel. | |
202 | */ | |
203 | static int __init parse_elfcorehdr(char *arg) | |
204 | { | |
205 | if (!arg) | |
206 | return -EINVAL; | |
66759a01 | 207 | |
1a3f239d RR |
208 | elfcorehdr_addr = memparse(arg, &arg); |
209 | return 0; | |
210 | } | |
211 | early_param("elfcorehdr", parse_elfcorehdr); | |
212 | #endif /* CONFIG_PROC_VMCORE */ | |
1da177e4 | 213 | |
1a3f239d RR |
214 | /* |
215 | * highmem=size forces highmem to be exactly 'size' bytes. | |
216 | * This works even on boxes that have no highmem otherwise. | |
217 | * This also works to reduce highmem size on bigger boxes. | |
218 | */ | |
219 | static int __init parse_highmem(char *arg) | |
220 | { | |
221 | if (!arg) | |
222 | return -EINVAL; | |
9635b47d | 223 | |
1a3f239d RR |
224 | highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT; |
225 | return 0; | |
226 | } | |
227 | early_param("highmem", parse_highmem); | |
9635b47d | 228 | |
1a3f239d RR |
229 | /* |
230 | * vmalloc=size forces the vmalloc area to be exactly 'size' | |
231 | * bytes. This can be used to increase (or decrease) the | |
232 | * vmalloc area - the default is 128m. | |
233 | */ | |
234 | static int __init parse_vmalloc(char *arg) | |
235 | { | |
236 | if (!arg) | |
237 | return -EINVAL; | |
1bc3b91a | 238 | |
1a3f239d RR |
239 | __VMALLOC_RESERVE = memparse(arg, &arg); |
240 | return 0; | |
1da177e4 | 241 | } |
1a3f239d | 242 | early_param("vmalloc", parse_vmalloc); |
1da177e4 | 243 | |
461a9aff ZA |
244 | /* |
245 | * reservetop=size reserves a hole at the top of the kernel address space which | |
246 | * a hypervisor can load into later. Needed for dynamically loaded hypervisors, | |
247 | * so relocating the fixmap can be done before paging initialization. | |
248 | */ | |
249 | static int __init parse_reservetop(char *arg) | |
250 | { | |
251 | unsigned long address; | |
252 | ||
253 | if (!arg) | |
254 | return -EINVAL; | |
255 | ||
256 | address = memparse(arg, &arg); | |
257 | reserve_top_address(address); | |
258 | return 0; | |
259 | } | |
260 | early_param("reservetop", parse_reservetop); | |
261 | ||
1da177e4 LT |
262 | /* |
263 | * Determine low and high memory ranges: | |
264 | */ | |
265 | unsigned long __init find_max_low_pfn(void) | |
266 | { | |
267 | unsigned long max_low_pfn; | |
268 | ||
269 | max_low_pfn = max_pfn; | |
270 | if (max_low_pfn > MAXMEM_PFN) { | |
271 | if (highmem_pages == -1) | |
272 | highmem_pages = max_pfn - MAXMEM_PFN; | |
273 | if (highmem_pages + MAXMEM_PFN < max_pfn) | |
274 | max_pfn = MAXMEM_PFN + highmem_pages; | |
275 | if (highmem_pages + MAXMEM_PFN > max_pfn) { | |
276 | printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages)); | |
277 | highmem_pages = 0; | |
278 | } | |
279 | max_low_pfn = MAXMEM_PFN; | |
280 | #ifndef CONFIG_HIGHMEM | |
281 | /* Maximum memory usable is what is directly addressable */ | |
282 | printk(KERN_WARNING "Warning only %ldMB will be used.\n", | |
283 | MAXMEM>>20); | |
284 | if (max_pfn > MAX_NONPAE_PFN) | |
285 | printk(KERN_WARNING "Use a PAE enabled kernel.\n"); | |
286 | else | |
287 | printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); | |
288 | max_pfn = MAXMEM_PFN; | |
289 | #else /* !CONFIG_HIGHMEM */ | |
290 | #ifndef CONFIG_X86_PAE | |
291 | if (max_pfn > MAX_NONPAE_PFN) { | |
292 | max_pfn = MAX_NONPAE_PFN; | |
293 | printk(KERN_WARNING "Warning only 4GB will be used.\n"); | |
294 | printk(KERN_WARNING "Use a PAE enabled kernel.\n"); | |
295 | } | |
296 | #endif /* !CONFIG_X86_PAE */ | |
297 | #endif /* !CONFIG_HIGHMEM */ | |
298 | } else { | |
299 | if (highmem_pages == -1) | |
300 | highmem_pages = 0; | |
301 | #ifdef CONFIG_HIGHMEM | |
302 | if (highmem_pages >= max_pfn) { | |
303 | printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn)); | |
304 | highmem_pages = 0; | |
305 | } | |
306 | if (highmem_pages) { | |
307 | if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){ | |
308 | printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages)); | |
309 | highmem_pages = 0; | |
310 | } | |
311 | max_low_pfn -= highmem_pages; | |
312 | } | |
313 | #else | |
314 | if (highmem_pages) | |
315 | printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n"); | |
316 | #endif | |
317 | } | |
318 | return max_low_pfn; | |
319 | } | |
320 | ||
1da177e4 LT |
321 | /* |
322 | * workaround for Dell systems that neglect to reserve EBDA | |
323 | */ | |
324 | static void __init reserve_ebda_region(void) | |
325 | { | |
326 | unsigned int addr; | |
327 | addr = get_bios_ebda(); | |
328 | if (addr) | |
329 | reserve_bootmem(addr, PAGE_SIZE); | |
330 | } | |
331 | ||
05b79bdc | 332 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
1da177e4 LT |
333 | void __init setup_bootmem_allocator(void); |
334 | static unsigned long __init setup_memory(void) | |
335 | { | |
336 | /* | |
337 | * partially used pages are not usable - thus | |
338 | * we are rounding upwards: | |
339 | */ | |
340 | min_low_pfn = PFN_UP(init_pg_tables_end); | |
341 | ||
342 | find_max_pfn(); | |
343 | ||
344 | max_low_pfn = find_max_low_pfn(); | |
345 | ||
346 | #ifdef CONFIG_HIGHMEM | |
347 | highstart_pfn = highend_pfn = max_pfn; | |
348 | if (max_pfn > max_low_pfn) { | |
349 | highstart_pfn = max_low_pfn; | |
350 | } | |
351 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", | |
352 | pages_to_mb(highend_pfn - highstart_pfn)); | |
ba9c231f JB |
353 | num_physpages = highend_pfn; |
354 | high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; | |
355 | #else | |
356 | num_physpages = max_low_pfn; | |
357 | high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; | |
358 | #endif | |
359 | #ifdef CONFIG_FLATMEM | |
360 | max_mapnr = num_physpages; | |
1da177e4 LT |
361 | #endif |
362 | printk(KERN_NOTICE "%ldMB LOWMEM available.\n", | |
363 | pages_to_mb(max_low_pfn)); | |
364 | ||
365 | setup_bootmem_allocator(); | |
366 | ||
367 | return max_low_pfn; | |
368 | } | |
369 | ||
370 | void __init zone_sizes_init(void) | |
371 | { | |
6391af17 MG |
372 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
373 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); | |
374 | max_zone_pfns[ZONE_DMA] = | |
375 | virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; | |
376 | max_zone_pfns[ZONE_NORMAL] = max_low_pfn; | |
1da177e4 | 377 | #ifdef CONFIG_HIGHMEM |
6391af17 | 378 | max_zone_pfns[ZONE_HIGHMEM] = highend_pfn; |
4cfee88a MG |
379 | add_active_range(0, 0, highend_pfn); |
380 | #else | |
4cfee88a | 381 | add_active_range(0, 0, max_low_pfn); |
1da177e4 | 382 | #endif |
4cfee88a MG |
383 | |
384 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
385 | } |
386 | #else | |
05b79bdc | 387 | extern unsigned long __init setup_memory(void); |
1da177e4 | 388 | extern void zone_sizes_init(void); |
05b79bdc | 389 | #endif /* !CONFIG_NEED_MULTIPLE_NODES */ |
1da177e4 LT |
390 | |
391 | void __init setup_bootmem_allocator(void) | |
392 | { | |
393 | unsigned long bootmap_size; | |
394 | /* | |
395 | * Initialize the boot-time allocator (with low memory only): | |
396 | */ | |
397 | bootmap_size = init_bootmem(min_low_pfn, max_low_pfn); | |
398 | ||
399 | register_bootmem_low_pages(max_low_pfn); | |
400 | ||
401 | /* | |
402 | * Reserve the bootmem bitmap itself as well. We do this in two | |
403 | * steps (first step was init_bootmem()) because this catches | |
404 | * the (very unlikely) case of us accidentally initializing the | |
405 | * bootmem allocator with an invalid RAM area. | |
406 | */ | |
8621b81c EB |
407 | reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) + |
408 | bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text)); | |
1da177e4 LT |
409 | |
410 | /* | |
411 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
412 | * enabling clean reboots, SMP operation, laptop functions. | |
413 | */ | |
414 | reserve_bootmem(0, PAGE_SIZE); | |
415 | ||
416 | /* reserve EBDA region, it's a 4K region */ | |
417 | reserve_ebda_region(); | |
418 | ||
419 | /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent | |
420 | PCI prefetch into it (errata #56). Usually the page is reserved anyways, | |
421 | unless you have no PS/2 mouse plugged in. */ | |
422 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && | |
423 | boot_cpu_data.x86 == 6) | |
424 | reserve_bootmem(0xa0000 - 4096, 4096); | |
425 | ||
426 | #ifdef CONFIG_SMP | |
427 | /* | |
428 | * But first pinch a few for the stack/trampoline stuff | |
429 | * FIXME: Don't need the extra page at 4K, but need to fix | |
430 | * trampoline before removing it. (see the GDT stuff) | |
431 | */ | |
432 | reserve_bootmem(PAGE_SIZE, PAGE_SIZE); | |
433 | #endif | |
434 | #ifdef CONFIG_ACPI_SLEEP | |
435 | /* | |
436 | * Reserve low memory region for sleep support. | |
437 | */ | |
438 | acpi_reserve_bootmem(); | |
439 | #endif | |
440 | #ifdef CONFIG_X86_FIND_SMP_CONFIG | |
441 | /* | |
442 | * Find and reserve possible boot-time SMP configuration: | |
443 | */ | |
444 | find_smp_config(); | |
445 | #endif | |
91023300 | 446 | numa_kva_reserve(); |
1da177e4 LT |
447 | #ifdef CONFIG_BLK_DEV_INITRD |
448 | if (LOADER_TYPE && INITRD_START) { | |
449 | if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) { | |
450 | reserve_bootmem(INITRD_START, INITRD_SIZE); | |
19e5d9c0 | 451 | initrd_start = INITRD_START + PAGE_OFFSET; |
1da177e4 LT |
452 | initrd_end = initrd_start+INITRD_SIZE; |
453 | } | |
454 | else { | |
455 | printk(KERN_ERR "initrd extends beyond end of memory " | |
456 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
457 | INITRD_START + INITRD_SIZE, | |
458 | max_low_pfn << PAGE_SHIFT); | |
459 | initrd_start = 0; | |
460 | } | |
461 | } | |
462 | #endif | |
1bc3b91a EB |
463 | #ifdef CONFIG_KEXEC |
464 | if (crashk_res.start != crashk_res.end) | |
465 | reserve_bootmem(crashk_res.start, | |
466 | crashk_res.end - crashk_res.start + 1); | |
467 | #endif | |
1da177e4 LT |
468 | } |
469 | ||
470 | /* | |
471 | * The node 0 pgdat is initialized before all of these because | |
472 | * it's needed for bootmem. node>0 pgdats have their virtual | |
473 | * space allocated before the pagetables are in place to access | |
474 | * them, so they can't be cleared then. | |
475 | * | |
476 | * This should all compile down to nothing when NUMA is off. | |
477 | */ | |
478 | void __init remapped_pgdat_init(void) | |
479 | { | |
480 | int nid; | |
481 | ||
482 | for_each_online_node(nid) { | |
483 | if (nid != 0) | |
484 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
485 | } | |
486 | } | |
487 | ||
1da177e4 LT |
488 | #ifdef CONFIG_MCA |
489 | static void set_mca_bus(int x) | |
490 | { | |
491 | MCA_bus = x; | |
492 | } | |
493 | #else | |
494 | static void set_mca_bus(int x) { } | |
495 | #endif | |
496 | ||
d3561b7f RR |
497 | /* Overridden in paravirt.c if CONFIG_PARAVIRT */ |
498 | char * __attribute__((weak)) memory_setup(void) | |
499 | { | |
500 | return machine_specific_memory_setup(); | |
501 | } | |
502 | ||
1da177e4 LT |
503 | /* |
504 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
505 | * passed the efi memmap, systab, etc., so we should use these data structures | |
506 | * for initialization. Note, the efi init code path is determined by the | |
507 | * global efi_enabled. This allows the same kernel image to be used on existing | |
508 | * systems (with a traditional BIOS) as well as on EFI systems. | |
509 | */ | |
510 | void __init setup_arch(char **cmdline_p) | |
511 | { | |
512 | unsigned long max_low_pfn; | |
513 | ||
514 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); | |
515 | pre_setup_arch_hook(); | |
516 | early_cpu_init(); | |
517 | ||
518 | /* | |
519 | * FIXME: This isn't an official loader_type right | |
520 | * now but does currently work with elilo. | |
521 | * If we were configured as an EFI kernel, check to make | |
522 | * sure that we were loaded correctly from elilo and that | |
523 | * the system table is valid. If not, then initialize normally. | |
524 | */ | |
525 | #ifdef CONFIG_EFI | |
526 | if ((LOADER_TYPE == 0x50) && EFI_SYSTAB) | |
527 | efi_enabled = 1; | |
528 | #endif | |
529 | ||
530 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); | |
531 | drive_info = DRIVE_INFO; | |
532 | screen_info = SCREEN_INFO; | |
533 | edid_info = EDID_INFO; | |
534 | apm_info.bios = APM_BIOS_INFO; | |
535 | ist_info = IST_INFO; | |
536 | saved_videomode = VIDEO_MODE; | |
537 | if( SYS_DESC_TABLE.length != 0 ) { | |
538 | set_mca_bus(SYS_DESC_TABLE.table[3] & 0x2); | |
539 | machine_id = SYS_DESC_TABLE.table[0]; | |
540 | machine_submodel_id = SYS_DESC_TABLE.table[1]; | |
541 | BIOS_revision = SYS_DESC_TABLE.table[2]; | |
542 | } | |
543 | bootloader_type = LOADER_TYPE; | |
544 | ||
545 | #ifdef CONFIG_BLK_DEV_RAM | |
546 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; | |
547 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); | |
548 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); | |
549 | #endif | |
550 | ARCH_SETUP | |
551 | if (efi_enabled) | |
552 | efi_init(); | |
553 | else { | |
554 | printk(KERN_INFO "BIOS-provided physical RAM map:\n"); | |
d3561b7f | 555 | print_memory_map(memory_setup()); |
1da177e4 LT |
556 | } |
557 | ||
558 | copy_edd(); | |
559 | ||
560 | if (!MOUNT_ROOT_RDONLY) | |
561 | root_mountflags &= ~MS_RDONLY; | |
562 | init_mm.start_code = (unsigned long) _text; | |
563 | init_mm.end_code = (unsigned long) _etext; | |
564 | init_mm.end_data = (unsigned long) _edata; | |
565 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; | |
566 | ||
567 | code_resource.start = virt_to_phys(_text); | |
568 | code_resource.end = virt_to_phys(_etext)-1; | |
569 | data_resource.start = virt_to_phys(_etext); | |
570 | data_resource.end = virt_to_phys(_edata)-1; | |
571 | ||
1a3f239d | 572 | parse_early_param(); |
1da177e4 | 573 | |
1a3f239d RR |
574 | if (user_defined_memmap) { |
575 | printk(KERN_INFO "user-defined physical RAM map:\n"); | |
576 | print_memory_map("user"); | |
99b7de33 | 577 | } |
1a3f239d RR |
578 | |
579 | strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE); | |
580 | *cmdline_p = command_line; | |
99b7de33 | 581 | |
1da177e4 LT |
582 | max_low_pfn = setup_memory(); |
583 | ||
584 | /* | |
585 | * NOTE: before this point _nobody_ is allowed to allocate | |
586 | * any memory using the bootmem allocator. Although the | |
587 | * alloctor is now initialised only the first 8Mb of the kernel | |
588 | * virtual address space has been mapped. All allocations before | |
589 | * paging_init() has completed must use the alloc_bootmem_low_pages() | |
590 | * variant (which allocates DMA'able memory) and care must be taken | |
591 | * not to exceed the 8Mb limit. | |
592 | */ | |
593 | ||
594 | #ifdef CONFIG_SMP | |
595 | smp_alloc_memory(); /* AP processor realmode stacks in low memory*/ | |
596 | #endif | |
597 | paging_init(); | |
598 | remapped_pgdat_init(); | |
05b79bdc | 599 | sparse_init(); |
1da177e4 LT |
600 | zone_sizes_init(); |
601 | ||
602 | /* | |
603 | * NOTE: at this point the bootmem allocator is fully available. | |
604 | */ | |
605 | ||
1da177e4 LT |
606 | dmi_scan_machine(); |
607 | ||
608 | #ifdef CONFIG_X86_GENERICARCH | |
1a3f239d | 609 | generic_apic_probe(); |
1da177e4 LT |
610 | #endif |
611 | if (efi_enabled) | |
612 | efi_map_memmap(); | |
613 | ||
888ba6c6 | 614 | #ifdef CONFIG_ACPI |
1da177e4 LT |
615 | /* |
616 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
617 | */ | |
618 | acpi_boot_table_init(); | |
d44647b0 AC |
619 | #endif |
620 | ||
f157cbb1 | 621 | #ifdef CONFIG_PCI |
d44647b0 AC |
622 | #ifdef CONFIG_X86_IO_APIC |
623 | check_acpi_pci(); /* Checks more than just ACPI actually */ | |
624 | #endif | |
f157cbb1 | 625 | #endif |
d44647b0 AC |
626 | |
627 | #ifdef CONFIG_ACPI | |
1da177e4 LT |
628 | acpi_boot_init(); |
629 | ||
911a62d4 VP |
630 | #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) |
631 | if (def_to_bigsmp) | |
632 | printk(KERN_WARNING "More than 8 CPUs detected and " | |
633 | "CONFIG_X86_PC cannot handle it.\nUse " | |
634 | "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); | |
635 | #endif | |
636 | #endif | |
1da177e4 LT |
637 | #ifdef CONFIG_X86_LOCAL_APIC |
638 | if (smp_found_config) | |
639 | get_smp_config(); | |
640 | #endif | |
641 | ||
642 | register_memory(); | |
643 | ||
644 | #ifdef CONFIG_VT | |
645 | #if defined(CONFIG_VGA_CONSOLE) | |
646 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
647 | conswitchp = &vga_con; | |
648 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
649 | conswitchp = &dummy_con; | |
650 | #endif | |
651 | #endif | |
539eb11e | 652 | tsc_init(); |
1da177e4 LT |
653 | } |
654 | ||
e5c6c8e4 MN |
655 | static __init int add_pcspkr(void) |
656 | { | |
657 | struct platform_device *pd; | |
658 | int ret; | |
659 | ||
660 | pd = platform_device_alloc("pcspkr", -1); | |
661 | if (!pd) | |
662 | return -ENOMEM; | |
663 | ||
664 | ret = platform_device_add(pd); | |
665 | if (ret) | |
666 | platform_device_put(pd); | |
667 | ||
668 | return ret; | |
669 | } | |
670 | device_initcall(add_pcspkr); | |
671 | ||
1da177e4 LT |
672 | /* |
673 | * Local Variables: | |
674 | * mode:c | |
675 | * c-file-style:"k&r" | |
676 | * c-basic-offset:8 | |
677 | * End: | |
678 | */ |