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> | |
42 | #include <linux/nodemask.h> | |
1bc3b91a | 43 | #include <linux/kexec.h> |
2030eae5 | 44 | #include <linux/crash_dump.h> |
e9928674 | 45 | #include <linux/dmi.h> |
22a9835c | 46 | #include <linux/pfn.h> |
376ff035 | 47 | #include <linux/pci.h> |
f212ec4b | 48 | #include <linux/init_ohci1394_dma.h> |
1bc3b91a | 49 | |
1da177e4 | 50 | #include <video/edid.h> |
1bc3b91a | 51 | |
093af8d7 | 52 | #include <asm/mtrr.h> |
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> | |
7ce0bcfd | 63 | #include <asm/vmi.h> |
e75eac33 | 64 | #include <setup_arch.h> |
ce3fe6b2 | 65 | #include <asm/bios_ebda.h> |
00bf4098 | 66 | #include <asm/cacheflush.h> |
2fde61fd | 67 | #include <asm/processor.h> |
1da177e4 LT |
68 | |
69 | /* This value is set up by the early boot code to point to the value | |
70 | immediately after the boot time page tables. It contains a *physical* | |
71 | address, and must not be in the .bss segment! */ | |
72 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
73 | ||
1da177e4 LT |
74 | /* |
75 | * Machine setup.. | |
76 | */ | |
c9cce83d BW |
77 | static struct resource data_resource = { |
78 | .name = "Kernel data", | |
79 | .start = 0, | |
80 | .end = 0, | |
81 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
82 | }; | |
83 | ||
84 | static struct resource code_resource = { | |
85 | .name = "Kernel code", | |
86 | .start = 0, | |
87 | .end = 0, | |
88 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
89 | }; | |
90 | ||
91 | static struct resource bss_resource = { | |
92 | .name = "Kernel bss", | |
93 | .start = 0, | |
94 | .end = 0, | |
95 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
96 | }; | |
97 | ||
98 | static struct resource video_ram_resource = { | |
99 | .name = "Video RAM area", | |
100 | .start = 0xa0000, | |
101 | .end = 0xbffff, | |
102 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
103 | }; | |
104 | ||
105 | static struct resource standard_io_resources[] = { { | |
106 | .name = "dma1", | |
107 | .start = 0x0000, | |
108 | .end = 0x001f, | |
109 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
110 | }, { | |
111 | .name = "pic1", | |
112 | .start = 0x0020, | |
113 | .end = 0x0021, | |
114 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
115 | }, { | |
116 | .name = "timer0", | |
117 | .start = 0x0040, | |
118 | .end = 0x0043, | |
119 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
120 | }, { | |
121 | .name = "timer1", | |
122 | .start = 0x0050, | |
123 | .end = 0x0053, | |
124 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
125 | }, { | |
126 | .name = "keyboard", | |
127 | .start = 0x0060, | |
128 | .end = 0x006f, | |
129 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
130 | }, { | |
131 | .name = "dma page reg", | |
132 | .start = 0x0080, | |
133 | .end = 0x008f, | |
134 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
135 | }, { | |
136 | .name = "pic2", | |
137 | .start = 0x00a0, | |
138 | .end = 0x00a1, | |
139 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
140 | }, { | |
141 | .name = "dma2", | |
142 | .start = 0x00c0, | |
143 | .end = 0x00df, | |
144 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
145 | }, { | |
146 | .name = "fpu", | |
147 | .start = 0x00f0, | |
148 | .end = 0x00ff, | |
149 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
150 | } }; | |
1da177e4 LT |
151 | |
152 | /* cpu data as detected by the assembly code in head.S */ | |
4a5d107a | 153 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
1da177e4 | 154 | /* common cpu data for all cpus */ |
c3d8c141 | 155 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
129f6946 | 156 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 | 157 | |
551889a6 | 158 | #ifndef CONFIG_X86_PAE |
1da177e4 | 159 | unsigned long mmu_cr4_features; |
551889a6 IC |
160 | #else |
161 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
162 | #endif | |
1da177e4 | 163 | |
1da177e4 LT |
164 | /* for MCA, but anyone else can use it if they want */ |
165 | unsigned int machine_id; | |
166 | unsigned int machine_submodel_id; | |
167 | unsigned int BIOS_revision; | |
1da177e4 | 168 | |
1da177e4 LT |
169 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
170 | int bootloader_type; | |
171 | ||
172 | /* user-defined highmem size */ | |
173 | static unsigned int highmem_pages = -1; | |
174 | ||
175 | /* | |
176 | * Setup options | |
177 | */ | |
1da177e4 | 178 | struct screen_info screen_info; |
129f6946 | 179 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 180 | struct apm_info apm_info; |
129f6946 | 181 | EXPORT_SYMBOL(apm_info); |
1da177e4 | 182 | struct edid_info edid_info; |
5e518d76 | 183 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 184 | struct ist_info ist_info; |
129f6946 AD |
185 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
186 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
187 | EXPORT_SYMBOL(ist_info); | |
188 | #endif | |
1da177e4 LT |
189 | |
190 | extern void early_cpu_init(void); | |
1da177e4 LT |
191 | extern int root_mountflags; |
192 | ||
193 | unsigned long saved_videomode; | |
194 | ||
cf8fa920 | 195 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 196 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 197 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 198 | |
4e498b66 | 199 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 | 200 | |
6d7d7433 | 201 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
48c7ae67 | 202 | struct boot_params __initdata boot_params; |
6d7d7433 HY |
203 | #else |
204 | struct boot_params boot_params; | |
205 | #endif | |
1da177e4 | 206 | |
1da177e4 LT |
207 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
208 | struct edd edd; | |
209 | #ifdef CONFIG_EDD_MODULE | |
210 | EXPORT_SYMBOL(edd); | |
211 | #endif | |
212 | /** | |
213 | * copy_edd() - Copy the BIOS EDD information | |
214 | * from boot_params into a safe place. | |
215 | * | |
216 | */ | |
217 | static inline void copy_edd(void) | |
218 | { | |
30c82645 PA |
219 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
220 | sizeof(edd.mbr_signature)); | |
221 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
222 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
223 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
224 | } |
225 | #else | |
226 | static inline void copy_edd(void) | |
227 | { | |
228 | } | |
229 | #endif | |
230 | ||
537d9160 | 231 | int __initdata user_defined_memmap; |
1da177e4 | 232 | |
1a3f239d RR |
233 | /* |
234 | * "mem=nopentium" disables the 4MB page tables. | |
235 | * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM | |
236 | * to <mem>, overriding the bios size. | |
237 | * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from | |
238 | * <start> to <start>+<mem>, overriding the bios size. | |
239 | * | |
240 | * HPA tells me bootloaders need to parse mem=, so no new | |
241 | * option should be mem= [also see Documentation/i386/boot.txt] | |
242 | */ | |
243 | static int __init parse_mem(char *arg) | |
244 | { | |
245 | if (!arg) | |
246 | return -EINVAL; | |
1da177e4 | 247 | |
1a3f239d | 248 | if (strcmp(arg, "nopentium") == 0) { |
13530257 | 249 | setup_clear_cpu_cap(X86_FEATURE_PSE); |
1a3f239d RR |
250 | } else { |
251 | /* If the user specifies memory size, we | |
252 | * limit the BIOS-provided memory map to | |
253 | * that size. exactmap can be used to specify | |
254 | * the exact map. mem=number can be used to | |
255 | * trim the existing memory map. | |
1da177e4 | 256 | */ |
1a3f239d | 257 | unsigned long long mem_size; |
cf8fa920 | 258 | |
1a3f239d RR |
259 | mem_size = memparse(arg, &arg); |
260 | limit_regions(mem_size); | |
261 | user_defined_memmap = 1; | |
262 | } | |
263 | return 0; | |
264 | } | |
265 | early_param("mem", parse_mem); | |
1da177e4 | 266 | |
1a3f239d RR |
267 | #ifdef CONFIG_PROC_VMCORE |
268 | /* elfcorehdr= specifies the location of elf core header | |
269 | * stored by the crashed kernel. | |
270 | */ | |
271 | static int __init parse_elfcorehdr(char *arg) | |
272 | { | |
273 | if (!arg) | |
274 | return -EINVAL; | |
66759a01 | 275 | |
1a3f239d RR |
276 | elfcorehdr_addr = memparse(arg, &arg); |
277 | return 0; | |
278 | } | |
279 | early_param("elfcorehdr", parse_elfcorehdr); | |
280 | #endif /* CONFIG_PROC_VMCORE */ | |
1da177e4 | 281 | |
1a3f239d RR |
282 | /* |
283 | * highmem=size forces highmem to be exactly 'size' bytes. | |
284 | * This works even on boxes that have no highmem otherwise. | |
285 | * This also works to reduce highmem size on bigger boxes. | |
286 | */ | |
287 | static int __init parse_highmem(char *arg) | |
288 | { | |
289 | if (!arg) | |
290 | return -EINVAL; | |
9635b47d | 291 | |
1a3f239d RR |
292 | highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT; |
293 | return 0; | |
294 | } | |
295 | early_param("highmem", parse_highmem); | |
9635b47d | 296 | |
1a3f239d RR |
297 | /* |
298 | * vmalloc=size forces the vmalloc area to be exactly 'size' | |
299 | * bytes. This can be used to increase (or decrease) the | |
300 | * vmalloc area - the default is 128m. | |
301 | */ | |
302 | static int __init parse_vmalloc(char *arg) | |
303 | { | |
304 | if (!arg) | |
305 | return -EINVAL; | |
1bc3b91a | 306 | |
1a3f239d RR |
307 | __VMALLOC_RESERVE = memparse(arg, &arg); |
308 | return 0; | |
1da177e4 | 309 | } |
1a3f239d | 310 | early_param("vmalloc", parse_vmalloc); |
1da177e4 | 311 | |
461a9aff ZA |
312 | /* |
313 | * reservetop=size reserves a hole at the top of the kernel address space which | |
314 | * a hypervisor can load into later. Needed for dynamically loaded hypervisors, | |
315 | * so relocating the fixmap can be done before paging initialization. | |
316 | */ | |
317 | static int __init parse_reservetop(char *arg) | |
318 | { | |
319 | unsigned long address; | |
320 | ||
321 | if (!arg) | |
322 | return -EINVAL; | |
323 | ||
324 | address = memparse(arg, &arg); | |
325 | reserve_top_address(address); | |
326 | return 0; | |
327 | } | |
328 | early_param("reservetop", parse_reservetop); | |
329 | ||
1da177e4 LT |
330 | /* |
331 | * Determine low and high memory ranges: | |
332 | */ | |
333 | unsigned long __init find_max_low_pfn(void) | |
334 | { | |
335 | unsigned long max_low_pfn; | |
336 | ||
337 | max_low_pfn = max_pfn; | |
338 | if (max_low_pfn > MAXMEM_PFN) { | |
339 | if (highmem_pages == -1) | |
340 | highmem_pages = max_pfn - MAXMEM_PFN; | |
341 | if (highmem_pages + MAXMEM_PFN < max_pfn) | |
342 | max_pfn = MAXMEM_PFN + highmem_pages; | |
343 | if (highmem_pages + MAXMEM_PFN > max_pfn) { | |
344 | printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages)); | |
345 | highmem_pages = 0; | |
346 | } | |
347 | max_low_pfn = MAXMEM_PFN; | |
348 | #ifndef CONFIG_HIGHMEM | |
349 | /* Maximum memory usable is what is directly addressable */ | |
350 | printk(KERN_WARNING "Warning only %ldMB will be used.\n", | |
351 | MAXMEM>>20); | |
352 | if (max_pfn > MAX_NONPAE_PFN) | |
c673f1a9 | 353 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 LT |
354 | else |
355 | printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); | |
356 | max_pfn = MAXMEM_PFN; | |
357 | #else /* !CONFIG_HIGHMEM */ | |
c673f1a9 | 358 | #ifndef CONFIG_HIGHMEM64G |
1da177e4 LT |
359 | if (max_pfn > MAX_NONPAE_PFN) { |
360 | max_pfn = MAX_NONPAE_PFN; | |
361 | printk(KERN_WARNING "Warning only 4GB will be used.\n"); | |
c673f1a9 | 362 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 | 363 | } |
c673f1a9 | 364 | #endif /* !CONFIG_HIGHMEM64G */ |
1da177e4 LT |
365 | #endif /* !CONFIG_HIGHMEM */ |
366 | } else { | |
367 | if (highmem_pages == -1) | |
368 | highmem_pages = 0; | |
369 | #ifdef CONFIG_HIGHMEM | |
370 | if (highmem_pages >= max_pfn) { | |
371 | printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn)); | |
372 | highmem_pages = 0; | |
373 | } | |
374 | if (highmem_pages) { | |
375 | if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){ | |
376 | printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages)); | |
377 | highmem_pages = 0; | |
378 | } | |
379 | max_low_pfn -= highmem_pages; | |
380 | } | |
381 | #else | |
382 | if (highmem_pages) | |
383 | printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n"); | |
384 | #endif | |
385 | } | |
386 | return max_low_pfn; | |
387 | } | |
388 | ||
dedd04be AH |
389 | #define BIOS_EBDA_SEGMENT 0x40E |
390 | #define BIOS_LOWMEM_KILOBYTES 0x413 | |
391 | ||
1da177e4 | 392 | /* |
dedd04be AH |
393 | * The BIOS places the EBDA/XBDA at the top of conventional |
394 | * memory, and usually decreases the reported amount of | |
395 | * conventional memory (int 0x12) too. This also contains a | |
396 | * workaround for Dell systems that neglect to reserve EBDA. | |
397 | * The same workaround also avoids a problem with the AMD768MPX | |
398 | * chipset: reserve a page before VGA to prevent PCI prefetch | |
399 | * into it (errata #56). Usually the page is reserved anyways, | |
400 | * unless you have no PS/2 mouse plugged in. | |
1da177e4 LT |
401 | */ |
402 | static void __init reserve_ebda_region(void) | |
403 | { | |
dedd04be AH |
404 | unsigned int lowmem, ebda_addr; |
405 | ||
406 | /* To determine the position of the EBDA and the */ | |
407 | /* end of conventional memory, we need to look at */ | |
408 | /* the BIOS data area. In a paravirtual environment */ | |
409 | /* that area is absent. We'll just have to assume */ | |
410 | /* that the paravirt case can handle memory setup */ | |
411 | /* correctly, without our help. */ | |
2fde61fd | 412 | if (paravirt_enabled()) |
dedd04be | 413 | return; |
dedd04be AH |
414 | |
415 | /* end of low (conventional) memory */ | |
416 | lowmem = *(unsigned short *)__va(BIOS_LOWMEM_KILOBYTES); | |
417 | lowmem <<= 10; | |
418 | ||
419 | /* start of EBDA area */ | |
420 | ebda_addr = *(unsigned short *)__va(BIOS_EBDA_SEGMENT); | |
421 | ebda_addr <<= 4; | |
422 | ||
423 | /* Fixup: bios puts an EBDA in the top 64K segment */ | |
424 | /* of conventional memory, but does not adjust lowmem. */ | |
425 | if ((lowmem - ebda_addr) <= 0x10000) | |
426 | lowmem = ebda_addr; | |
427 | ||
428 | /* Fixup: bios does not report an EBDA at all. */ | |
429 | /* Some old Dells seem to need 4k anyhow (bugzilla 2990) */ | |
430 | if ((ebda_addr == 0) && (lowmem >= 0x9f000)) | |
431 | lowmem = 0x9f000; | |
432 | ||
433 | /* Paranoia: should never happen, but... */ | |
434 | if ((lowmem == 0) || (lowmem >= 0x100000)) | |
435 | lowmem = 0x9f000; | |
436 | ||
437 | /* reserve all memory between lowmem and the 1MB mark */ | |
438 | reserve_bootmem(lowmem, 0x100000 - lowmem, BOOTMEM_DEFAULT); | |
1da177e4 LT |
439 | } |
440 | ||
05b79bdc | 441 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
1da177e4 LT |
442 | void __init setup_bootmem_allocator(void); |
443 | static unsigned long __init setup_memory(void) | |
444 | { | |
445 | /* | |
446 | * partially used pages are not usable - thus | |
447 | * we are rounding upwards: | |
448 | */ | |
449 | min_low_pfn = PFN_UP(init_pg_tables_end); | |
450 | ||
1da177e4 LT |
451 | max_low_pfn = find_max_low_pfn(); |
452 | ||
453 | #ifdef CONFIG_HIGHMEM | |
454 | highstart_pfn = highend_pfn = max_pfn; | |
455 | if (max_pfn > max_low_pfn) { | |
456 | highstart_pfn = max_low_pfn; | |
457 | } | |
458 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", | |
459 | pages_to_mb(highend_pfn - highstart_pfn)); | |
ba9c231f JB |
460 | num_physpages = highend_pfn; |
461 | high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; | |
462 | #else | |
463 | num_physpages = max_low_pfn; | |
464 | high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; | |
465 | #endif | |
466 | #ifdef CONFIG_FLATMEM | |
467 | max_mapnr = num_physpages; | |
1da177e4 LT |
468 | #endif |
469 | printk(KERN_NOTICE "%ldMB LOWMEM available.\n", | |
470 | pages_to_mb(max_low_pfn)); | |
471 | ||
472 | setup_bootmem_allocator(); | |
473 | ||
474 | return max_low_pfn; | |
475 | } | |
476 | ||
477 | void __init zone_sizes_init(void) | |
478 | { | |
6391af17 MG |
479 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
480 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); | |
481 | max_zone_pfns[ZONE_DMA] = | |
482 | virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; | |
483 | max_zone_pfns[ZONE_NORMAL] = max_low_pfn; | |
1da177e4 | 484 | #ifdef CONFIG_HIGHMEM |
6391af17 | 485 | max_zone_pfns[ZONE_HIGHMEM] = highend_pfn; |
4cfee88a MG |
486 | add_active_range(0, 0, highend_pfn); |
487 | #else | |
4cfee88a | 488 | add_active_range(0, 0, max_low_pfn); |
1da177e4 | 489 | #endif |
4cfee88a MG |
490 | |
491 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
492 | } |
493 | #else | |
05b79bdc | 494 | extern unsigned long __init setup_memory(void); |
1da177e4 | 495 | extern void zone_sizes_init(void); |
05b79bdc | 496 | #endif /* !CONFIG_NEED_MULTIPLE_NODES */ |
1da177e4 | 497 | |
d62cc471 BW |
498 | static inline unsigned long long get_total_mem(void) |
499 | { | |
500 | unsigned long long total; | |
501 | ||
502 | total = max_low_pfn - min_low_pfn; | |
503 | #ifdef CONFIG_HIGHMEM | |
504 | total += highend_pfn - highstart_pfn; | |
505 | #endif | |
506 | ||
507 | return total << PAGE_SHIFT; | |
508 | } | |
509 | ||
510 | #ifdef CONFIG_KEXEC | |
511 | static void __init reserve_crashkernel(void) | |
512 | { | |
513 | unsigned long long total_mem; | |
514 | unsigned long long crash_size, crash_base; | |
515 | int ret; | |
516 | ||
517 | total_mem = get_total_mem(); | |
518 | ||
519 | ret = parse_crashkernel(boot_command_line, total_mem, | |
520 | &crash_size, &crash_base); | |
521 | if (ret == 0 && crash_size > 0) { | |
522 | if (crash_base > 0) { | |
523 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
524 | "for crashkernel (System RAM: %ldMB)\n", | |
525 | (unsigned long)(crash_size >> 20), | |
526 | (unsigned long)(crash_base >> 20), | |
527 | (unsigned long)(total_mem >> 20)); | |
528 | crashk_res.start = crash_base; | |
529 | crashk_res.end = crash_base + crash_size - 1; | |
72a7fe39 BW |
530 | reserve_bootmem(crash_base, crash_size, |
531 | BOOTMEM_DEFAULT); | |
d62cc471 BW |
532 | } else |
533 | printk(KERN_INFO "crashkernel reservation failed - " | |
534 | "you have to specify a base address\n"); | |
535 | } | |
536 | } | |
537 | #else | |
538 | static inline void __init reserve_crashkernel(void) | |
539 | {} | |
540 | #endif | |
541 | ||
cf8fa920 PA |
542 | #ifdef CONFIG_BLK_DEV_INITRD |
543 | ||
544 | static bool do_relocate_initrd = false; | |
545 | ||
546 | static void __init reserve_initrd(void) | |
547 | { | |
548 | unsigned long ramdisk_image = boot_params.hdr.ramdisk_image; | |
549 | unsigned long ramdisk_size = boot_params.hdr.ramdisk_size; | |
550 | unsigned long ramdisk_end = ramdisk_image + ramdisk_size; | |
551 | unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
552 | unsigned long ramdisk_here; | |
553 | ||
554 | initrd_start = 0; | |
555 | ||
556 | if (!boot_params.hdr.type_of_loader || | |
557 | !ramdisk_image || !ramdisk_size) | |
558 | return; /* No initrd provided by bootloader */ | |
559 | ||
560 | if (ramdisk_end < ramdisk_image) { | |
561 | printk(KERN_ERR "initrd wraps around end of memory, " | |
562 | "disabling initrd\n"); | |
563 | return; | |
564 | } | |
565 | if (ramdisk_size >= end_of_lowmem/2) { | |
566 | printk(KERN_ERR "initrd too large to handle, " | |
567 | "disabling initrd\n"); | |
568 | return; | |
569 | } | |
570 | if (ramdisk_end <= end_of_lowmem) { | |
571 | /* All in lowmem, easy case */ | |
72a7fe39 | 572 | reserve_bootmem(ramdisk_image, ramdisk_size, BOOTMEM_DEFAULT); |
cf8fa920 PA |
573 | initrd_start = ramdisk_image + PAGE_OFFSET; |
574 | initrd_end = initrd_start+ramdisk_size; | |
575 | return; | |
576 | } | |
577 | ||
578 | /* We need to move the initrd down into lowmem */ | |
579 | ramdisk_here = (end_of_lowmem - ramdisk_size) & PAGE_MASK; | |
580 | ||
581 | /* Note: this includes all the lowmem currently occupied by | |
582 | the initrd, we rely on that fact to keep the data intact. */ | |
72a7fe39 | 583 | reserve_bootmem(ramdisk_here, ramdisk_size, BOOTMEM_DEFAULT); |
cf8fa920 PA |
584 | initrd_start = ramdisk_here + PAGE_OFFSET; |
585 | initrd_end = initrd_start + ramdisk_size; | |
586 | ||
587 | do_relocate_initrd = true; | |
588 | } | |
589 | ||
590 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) | |
591 | ||
592 | static void __init relocate_initrd(void) | |
593 | { | |
594 | unsigned long ramdisk_image = boot_params.hdr.ramdisk_image; | |
595 | unsigned long ramdisk_size = boot_params.hdr.ramdisk_size; | |
596 | unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
597 | unsigned long ramdisk_here; | |
598 | unsigned long slop, clen, mapaddr; | |
599 | char *p, *q; | |
600 | ||
601 | if (!do_relocate_initrd) | |
602 | return; | |
603 | ||
604 | ramdisk_here = initrd_start - PAGE_OFFSET; | |
605 | ||
606 | q = (char *)initrd_start; | |
607 | ||
608 | /* Copy any lowmem portion of the initrd */ | |
609 | if (ramdisk_image < end_of_lowmem) { | |
610 | clen = end_of_lowmem - ramdisk_image; | |
611 | p = (char *)__va(ramdisk_image); | |
612 | memcpy(q, p, clen); | |
613 | q += clen; | |
614 | ramdisk_image += clen; | |
615 | ramdisk_size -= clen; | |
616 | } | |
617 | ||
618 | /* Copy the highmem portion of the initrd */ | |
619 | while (ramdisk_size) { | |
620 | slop = ramdisk_image & ~PAGE_MASK; | |
621 | clen = ramdisk_size; | |
622 | if (clen > MAX_MAP_CHUNK-slop) | |
623 | clen = MAX_MAP_CHUNK-slop; | |
624 | mapaddr = ramdisk_image & PAGE_MASK; | |
beacfaac | 625 | p = early_ioremap(mapaddr, clen+slop); |
cf8fa920 | 626 | memcpy(q, p+slop, clen); |
beacfaac | 627 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
628 | q += clen; |
629 | ramdisk_image += clen; | |
630 | ramdisk_size -= clen; | |
631 | } | |
632 | } | |
633 | ||
634 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
635 | ||
1da177e4 LT |
636 | void __init setup_bootmem_allocator(void) |
637 | { | |
638 | unsigned long bootmap_size; | |
639 | /* | |
640 | * Initialize the boot-time allocator (with low memory only): | |
641 | */ | |
642 | bootmap_size = init_bootmem(min_low_pfn, max_low_pfn); | |
643 | ||
644 | register_bootmem_low_pages(max_low_pfn); | |
645 | ||
646 | /* | |
647 | * Reserve the bootmem bitmap itself as well. We do this in two | |
648 | * steps (first step was init_bootmem()) because this catches | |
649 | * the (very unlikely) case of us accidentally initializing the | |
650 | * bootmem allocator with an invalid RAM area. | |
651 | */ | |
8621b81c | 652 | reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) + |
72a7fe39 BW |
653 | bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text), |
654 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
655 | |
656 | /* | |
657 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
658 | * enabling clean reboots, SMP operation, laptop functions. | |
659 | */ | |
72a7fe39 | 660 | reserve_bootmem(0, PAGE_SIZE, BOOTMEM_DEFAULT); |
1da177e4 | 661 | |
dedd04be | 662 | /* reserve EBDA region */ |
1da177e4 LT |
663 | reserve_ebda_region(); |
664 | ||
1da177e4 LT |
665 | #ifdef CONFIG_SMP |
666 | /* | |
667 | * But first pinch a few for the stack/trampoline stuff | |
668 | * FIXME: Don't need the extra page at 4K, but need to fix | |
669 | * trampoline before removing it. (see the GDT stuff) | |
670 | */ | |
72a7fe39 | 671 | reserve_bootmem(PAGE_SIZE, PAGE_SIZE, BOOTMEM_DEFAULT); |
1da177e4 | 672 | #endif |
673d5b43 | 673 | #ifdef CONFIG_ACPI_SLEEP |
1da177e4 LT |
674 | /* |
675 | * Reserve low memory region for sleep support. | |
676 | */ | |
677 | acpi_reserve_bootmem(); | |
678 | #endif | |
679 | #ifdef CONFIG_X86_FIND_SMP_CONFIG | |
680 | /* | |
681 | * Find and reserve possible boot-time SMP configuration: | |
682 | */ | |
683 | find_smp_config(); | |
684 | #endif | |
1da177e4 | 685 | #ifdef CONFIG_BLK_DEV_INITRD |
cf8fa920 | 686 | reserve_initrd(); |
1da177e4 | 687 | #endif |
cf8fa920 | 688 | numa_kva_reserve(); |
d62cc471 | 689 | reserve_crashkernel(); |
1da177e4 LT |
690 | } |
691 | ||
692 | /* | |
693 | * The node 0 pgdat is initialized before all of these because | |
694 | * it's needed for bootmem. node>0 pgdats have their virtual | |
695 | * space allocated before the pagetables are in place to access | |
696 | * them, so they can't be cleared then. | |
697 | * | |
698 | * This should all compile down to nothing when NUMA is off. | |
699 | */ | |
10079ae3 | 700 | static void __init remapped_pgdat_init(void) |
1da177e4 LT |
701 | { |
702 | int nid; | |
703 | ||
704 | for_each_online_node(nid) { | |
705 | if (nid != 0) | |
706 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
707 | } | |
708 | } | |
709 | ||
1da177e4 LT |
710 | #ifdef CONFIG_MCA |
711 | static void set_mca_bus(int x) | |
712 | { | |
713 | MCA_bus = x; | |
714 | } | |
715 | #else | |
716 | static void set_mca_bus(int x) { } | |
717 | #endif | |
718 | ||
d3561b7f | 719 | /* Overridden in paravirt.c if CONFIG_PARAVIRT */ |
88d20328 | 720 | char * __init __attribute__((weak)) memory_setup(void) |
d3561b7f RR |
721 | { |
722 | return machine_specific_memory_setup(); | |
723 | } | |
724 | ||
ccf82085 GOC |
725 | #ifdef CONFIG_NUMA |
726 | /* | |
727 | * In the golden day, when everything among i386 and x86_64 will be | |
728 | * integrated, this will not live here | |
729 | */ | |
730 | void *x86_cpu_to_node_map_early_ptr; | |
731 | int x86_cpu_to_node_map_init[NR_CPUS] = { | |
732 | [0 ... NR_CPUS-1] = NUMA_NO_NODE | |
733 | }; | |
734 | DEFINE_PER_CPU(int, x86_cpu_to_node_map) = NUMA_NO_NODE; | |
735 | #endif | |
736 | ||
1da177e4 LT |
737 | /* |
738 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
739 | * passed the efi memmap, systab, etc., so we should use these data structures | |
740 | * for initialization. Note, the efi init code path is determined by the | |
741 | * global efi_enabled. This allows the same kernel image to be used on existing | |
742 | * systems (with a traditional BIOS) as well as on EFI systems. | |
743 | */ | |
744 | void __init setup_arch(char **cmdline_p) | |
745 | { | |
746 | unsigned long max_low_pfn; | |
747 | ||
748 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); | |
749 | pre_setup_arch_hook(); | |
750 | early_cpu_init(); | |
beacfaac | 751 | early_ioremap_init(); |
1da177e4 | 752 | |
1da177e4 | 753 | #ifdef CONFIG_EFI |
e429795c HY |
754 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, |
755 | "EL32", 4)) | |
1da177e4 LT |
756 | efi_enabled = 1; |
757 | #endif | |
758 | ||
30c82645 PA |
759 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
760 | screen_info = boot_params.screen_info; | |
761 | edid_info = boot_params.edid_info; | |
762 | apm_info.bios = boot_params.apm_bios_info; | |
763 | ist_info = boot_params.ist_info; | |
764 | saved_videomode = boot_params.hdr.vid_mode; | |
765 | if( boot_params.sys_desc_table.length != 0 ) { | |
766 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); | |
767 | machine_id = boot_params.sys_desc_table.table[0]; | |
768 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
769 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 770 | } |
30c82645 | 771 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
772 | |
773 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
774 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
775 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
776 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 LT |
777 | #endif |
778 | ARCH_SETUP | |
2215e69d HY |
779 | |
780 | printk(KERN_INFO "BIOS-provided physical RAM map:\n"); | |
781 | print_memory_map(memory_setup()); | |
782 | ||
1da177e4 LT |
783 | copy_edd(); |
784 | ||
30c82645 | 785 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
786 | root_mountflags &= ~MS_RDONLY; |
787 | init_mm.start_code = (unsigned long) _text; | |
788 | init_mm.end_code = (unsigned long) _etext; | |
789 | init_mm.end_data = (unsigned long) _edata; | |
790 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; | |
791 | ||
792 | code_resource.start = virt_to_phys(_text); | |
793 | code_resource.end = virt_to_phys(_etext)-1; | |
794 | data_resource.start = virt_to_phys(_etext); | |
795 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
796 | bss_resource.start = virt_to_phys(&__bss_start); |
797 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 798 | |
1a3f239d | 799 | parse_early_param(); |
1da177e4 | 800 | |
1a3f239d RR |
801 | if (user_defined_memmap) { |
802 | printk(KERN_INFO "user-defined physical RAM map:\n"); | |
803 | print_memory_map("user"); | |
99b7de33 | 804 | } |
1a3f239d | 805 | |
4e498b66 | 806 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
1a3f239d | 807 | *cmdline_p = command_line; |
99b7de33 | 808 | |
8b2cb7a8 HY |
809 | if (efi_enabled) |
810 | efi_init(); | |
811 | ||
093af8d7 | 812 | /* update e820 for memory not covered by WB MTRRs */ |
76c32418 | 813 | find_max_pfn(); |
093af8d7 YL |
814 | mtrr_bp_init(); |
815 | if (mtrr_trim_uncached_memory(max_pfn)) | |
76c32418 YL |
816 | find_max_pfn(); |
817 | ||
818 | max_low_pfn = setup_memory(); | |
093af8d7 | 819 | |
7ce0bcfd ZA |
820 | #ifdef CONFIG_VMI |
821 | /* | |
822 | * Must be after max_low_pfn is determined, and before kernel | |
823 | * pagetables are setup. | |
824 | */ | |
825 | vmi_init(); | |
826 | #endif | |
827 | ||
1da177e4 LT |
828 | /* |
829 | * NOTE: before this point _nobody_ is allowed to allocate | |
830 | * any memory using the bootmem allocator. Although the | |
27b46d76 | 831 | * allocator is now initialised only the first 8Mb of the kernel |
1da177e4 LT |
832 | * virtual address space has been mapped. All allocations before |
833 | * paging_init() has completed must use the alloc_bootmem_low_pages() | |
834 | * variant (which allocates DMA'able memory) and care must be taken | |
835 | * not to exceed the 8Mb limit. | |
836 | */ | |
837 | ||
838 | #ifdef CONFIG_SMP | |
839 | smp_alloc_memory(); /* AP processor realmode stacks in low memory*/ | |
840 | #endif | |
841 | paging_init(); | |
f212ec4b BK |
842 | |
843 | /* | |
844 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
845 | */ | |
846 | ||
847 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
848 | if (init_ohci1394_dma_early) | |
849 | init_ohci1394_dma_on_all_controllers(); | |
850 | #endif | |
851 | ||
1da177e4 | 852 | remapped_pgdat_init(); |
05b79bdc | 853 | sparse_init(); |
1da177e4 LT |
854 | zone_sizes_init(); |
855 | ||
856 | /* | |
857 | * NOTE: at this point the bootmem allocator is fully available. | |
858 | */ | |
859 | ||
cf8fa920 PA |
860 | #ifdef CONFIG_BLK_DEV_INITRD |
861 | relocate_initrd(); | |
862 | #endif | |
863 | ||
6996d3b6 JF |
864 | paravirt_post_allocator_init(); |
865 | ||
1da177e4 LT |
866 | dmi_scan_machine(); |
867 | ||
cf8fa920 | 868 | io_delay_init(); |
b02aae9c | 869 | |
ccf82085 GOC |
870 | #ifdef CONFIG_X86_SMP |
871 | /* | |
872 | * setup to use the early static init tables during kernel startup | |
873 | * X86_SMP will exclude sub-arches that don't deal well with it. | |
874 | */ | |
875 | x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init; | |
876 | x86_bios_cpu_apicid_early_ptr = (void *)x86_bios_cpu_apicid_init; | |
877 | #ifdef CONFIG_NUMA | |
878 | x86_cpu_to_node_map_early_ptr = (void *)x86_cpu_to_node_map_init; | |
879 | #endif | |
880 | #endif | |
881 | ||
1da177e4 | 882 | #ifdef CONFIG_X86_GENERICARCH |
1a3f239d | 883 | generic_apic_probe(); |
cf8fa920 | 884 | #endif |
1da177e4 | 885 | |
888ba6c6 | 886 | #ifdef CONFIG_ACPI |
1da177e4 LT |
887 | /* |
888 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
889 | */ | |
890 | acpi_boot_table_init(); | |
d44647b0 AC |
891 | #endif |
892 | ||
54ef3400 | 893 | early_quirks(); |
d44647b0 AC |
894 | |
895 | #ifdef CONFIG_ACPI | |
1da177e4 LT |
896 | acpi_boot_init(); |
897 | ||
911a62d4 VP |
898 | #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) |
899 | if (def_to_bigsmp) | |
900 | printk(KERN_WARNING "More than 8 CPUs detected and " | |
901 | "CONFIG_X86_PC cannot handle it.\nUse " | |
902 | "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); | |
903 | #endif | |
904 | #endif | |
1da177e4 LT |
905 | #ifdef CONFIG_X86_LOCAL_APIC |
906 | if (smp_found_config) | |
907 | get_smp_config(); | |
908 | #endif | |
909 | ||
5c95da9f | 910 | e820_register_memory(); |
1c10070a | 911 | e820_mark_nosave_regions(); |
1da177e4 LT |
912 | |
913 | #ifdef CONFIG_VT | |
914 | #if defined(CONFIG_VGA_CONSOLE) | |
915 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
916 | conswitchp = &vga_con; | |
917 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
918 | conswitchp = &dummy_con; | |
919 | #endif | |
920 | #endif | |
921 | } | |
c9cce83d BW |
922 | |
923 | /* | |
924 | * Request address space for all standard resources | |
925 | * | |
926 | * This is called just before pcibios_init(), which is also a | |
927 | * subsys_initcall, but is linked in later (in arch/i386/pci/common.c). | |
928 | */ | |
929 | static int __init request_standard_resources(void) | |
930 | { | |
931 | int i; | |
932 | ||
933 | printk(KERN_INFO "Setting up standard PCI resources\n"); | |
2215e69d | 934 | init_iomem_resources(&code_resource, &data_resource, &bss_resource); |
c9cce83d | 935 | |
c9cce83d BW |
936 | request_resource(&iomem_resource, &video_ram_resource); |
937 | ||
938 | /* request I/O space for devices used on all i[345]86 PCs */ | |
939 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
940 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
941 | return 0; | |
942 | } | |
943 | ||
944 | subsys_initcall(request_standard_resources); |