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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> |
2030eae5 | 45 | #include <linux/crash_dump.h> |
e9928674 | 46 | #include <linux/dmi.h> |
22a9835c | 47 | #include <linux/pfn.h> |
376ff035 | 48 | #include <linux/pci.h> |
f212ec4b | 49 | #include <linux/init_ohci1394_dma.h> |
790c73f6 | 50 | #include <linux/kvm_para.h> |
1bc3b91a | 51 | |
1da177e4 | 52 | #include <video/edid.h> |
1bc3b91a | 53 | |
093af8d7 | 54 | #include <asm/mtrr.h> |
9635b47d | 55 | #include <asm/apic.h> |
1da177e4 LT |
56 | #include <asm/e820.h> |
57 | #include <asm/mpspec.h> | |
91023300 | 58 | #include <asm/mmzone.h> |
1da177e4 LT |
59 | #include <asm/setup.h> |
60 | #include <asm/arch_hooks.h> | |
61 | #include <asm/sections.h> | |
62 | #include <asm/io_apic.h> | |
63 | #include <asm/ist.h> | |
64 | #include <asm/io.h> | |
7ce0bcfd | 65 | #include <asm/vmi.h> |
e75eac33 | 66 | #include <setup_arch.h> |
ce3fe6b2 | 67 | #include <asm/bios_ebda.h> |
00bf4098 | 68 | #include <asm/cacheflush.h> |
2fde61fd | 69 | #include <asm/processor.h> |
1da177e4 LT |
70 | |
71 | /* This value is set up by the early boot code to point to the value | |
72 | immediately after the boot time page tables. It contains a *physical* | |
73 | address, and must not be in the .bss segment! */ | |
f0d43100 | 74 | unsigned long init_pg_tables_start __initdata = ~0UL; |
1da177e4 LT |
75 | unsigned long init_pg_tables_end __initdata = ~0UL; |
76 | ||
1da177e4 LT |
77 | /* |
78 | * Machine setup.. | |
79 | */ | |
c9cce83d BW |
80 | static struct resource data_resource = { |
81 | .name = "Kernel data", | |
82 | .start = 0, | |
83 | .end = 0, | |
84 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
85 | }; | |
86 | ||
87 | static struct resource code_resource = { | |
88 | .name = "Kernel code", | |
89 | .start = 0, | |
90 | .end = 0, | |
91 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
92 | }; | |
93 | ||
94 | static struct resource bss_resource = { | |
95 | .name = "Kernel bss", | |
96 | .start = 0, | |
97 | .end = 0, | |
98 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
99 | }; | |
100 | ||
101 | static struct resource video_ram_resource = { | |
102 | .name = "Video RAM area", | |
103 | .start = 0xa0000, | |
104 | .end = 0xbffff, | |
105 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
106 | }; | |
107 | ||
108 | static struct resource standard_io_resources[] = { { | |
109 | .name = "dma1", | |
110 | .start = 0x0000, | |
111 | .end = 0x001f, | |
112 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
113 | }, { | |
114 | .name = "pic1", | |
115 | .start = 0x0020, | |
116 | .end = 0x0021, | |
117 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
118 | }, { | |
119 | .name = "timer0", | |
120 | .start = 0x0040, | |
121 | .end = 0x0043, | |
122 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
123 | }, { | |
124 | .name = "timer1", | |
125 | .start = 0x0050, | |
126 | .end = 0x0053, | |
127 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
128 | }, { | |
129 | .name = "keyboard", | |
130 | .start = 0x0060, | |
9096bd7a HW |
131 | .end = 0x0060, |
132 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
133 | }, { | |
134 | .name = "keyboard", | |
135 | .start = 0x0064, | |
136 | .end = 0x0064, | |
c9cce83d BW |
137 | .flags = IORESOURCE_BUSY | IORESOURCE_IO |
138 | }, { | |
139 | .name = "dma page reg", | |
140 | .start = 0x0080, | |
141 | .end = 0x008f, | |
142 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
143 | }, { | |
144 | .name = "pic2", | |
145 | .start = 0x00a0, | |
146 | .end = 0x00a1, | |
147 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
148 | }, { | |
149 | .name = "dma2", | |
150 | .start = 0x00c0, | |
151 | .end = 0x00df, | |
152 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
153 | }, { | |
154 | .name = "fpu", | |
155 | .start = 0x00f0, | |
156 | .end = 0x00ff, | |
157 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
158 | } }; | |
1da177e4 LT |
159 | |
160 | /* cpu data as detected by the assembly code in head.S */ | |
4a5d107a | 161 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
1da177e4 | 162 | /* common cpu data for all cpus */ |
c3d8c141 | 163 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
129f6946 | 164 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 | 165 | |
0c254e38 AS |
166 | unsigned int def_to_bigsmp; |
167 | ||
551889a6 | 168 | #ifndef CONFIG_X86_PAE |
1da177e4 | 169 | unsigned long mmu_cr4_features; |
551889a6 IC |
170 | #else |
171 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
172 | #endif | |
1da177e4 | 173 | |
1da177e4 LT |
174 | /* for MCA, but anyone else can use it if they want */ |
175 | unsigned int machine_id; | |
176 | unsigned int machine_submodel_id; | |
177 | unsigned int BIOS_revision; | |
1da177e4 | 178 | |
1da177e4 LT |
179 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
180 | int bootloader_type; | |
181 | ||
182 | /* user-defined highmem size */ | |
183 | static unsigned int highmem_pages = -1; | |
184 | ||
185 | /* | |
186 | * Setup options | |
187 | */ | |
1da177e4 | 188 | struct screen_info screen_info; |
129f6946 | 189 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 190 | struct apm_info apm_info; |
129f6946 | 191 | EXPORT_SYMBOL(apm_info); |
1da177e4 | 192 | struct edid_info edid_info; |
5e518d76 | 193 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 194 | struct ist_info ist_info; |
129f6946 AD |
195 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
196 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
197 | EXPORT_SYMBOL(ist_info); | |
198 | #endif | |
1da177e4 LT |
199 | |
200 | extern void early_cpu_init(void); | |
1da177e4 LT |
201 | extern int root_mountflags; |
202 | ||
e44b7b75 | 203 | unsigned long saved_video_mode; |
1da177e4 | 204 | |
cf8fa920 | 205 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 206 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 207 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 208 | |
4e498b66 | 209 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 | 210 | |
6d7d7433 | 211 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
48c7ae67 | 212 | struct boot_params __initdata boot_params; |
6d7d7433 HY |
213 | #else |
214 | struct boot_params boot_params; | |
215 | #endif | |
1da177e4 | 216 | |
1da177e4 LT |
217 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
218 | struct edd edd; | |
219 | #ifdef CONFIG_EDD_MODULE | |
220 | EXPORT_SYMBOL(edd); | |
221 | #endif | |
222 | /** | |
223 | * copy_edd() - Copy the BIOS EDD information | |
224 | * from boot_params into a safe place. | |
225 | * | |
226 | */ | |
227 | static inline void copy_edd(void) | |
228 | { | |
30c82645 PA |
229 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
230 | sizeof(edd.mbr_signature)); | |
231 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
232 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
233 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
234 | } |
235 | #else | |
236 | static inline void copy_edd(void) | |
237 | { | |
238 | } | |
239 | #endif | |
240 | ||
1a3f239d RR |
241 | #ifdef CONFIG_PROC_VMCORE |
242 | /* elfcorehdr= specifies the location of elf core header | |
243 | * stored by the crashed kernel. | |
244 | */ | |
245 | static int __init parse_elfcorehdr(char *arg) | |
246 | { | |
247 | if (!arg) | |
248 | return -EINVAL; | |
66759a01 | 249 | |
1a3f239d RR |
250 | elfcorehdr_addr = memparse(arg, &arg); |
251 | return 0; | |
252 | } | |
253 | early_param("elfcorehdr", parse_elfcorehdr); | |
254 | #endif /* CONFIG_PROC_VMCORE */ | |
1da177e4 | 255 | |
1a3f239d RR |
256 | /* |
257 | * highmem=size forces highmem to be exactly 'size' bytes. | |
258 | * This works even on boxes that have no highmem otherwise. | |
259 | * This also works to reduce highmem size on bigger boxes. | |
260 | */ | |
261 | static int __init parse_highmem(char *arg) | |
262 | { | |
263 | if (!arg) | |
264 | return -EINVAL; | |
9635b47d | 265 | |
1a3f239d RR |
266 | highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT; |
267 | return 0; | |
268 | } | |
269 | early_param("highmem", parse_highmem); | |
9635b47d | 270 | |
1a3f239d RR |
271 | /* |
272 | * vmalloc=size forces the vmalloc area to be exactly 'size' | |
273 | * bytes. This can be used to increase (or decrease) the | |
274 | * vmalloc area - the default is 128m. | |
275 | */ | |
276 | static int __init parse_vmalloc(char *arg) | |
277 | { | |
278 | if (!arg) | |
279 | return -EINVAL; | |
1bc3b91a | 280 | |
1a3f239d RR |
281 | __VMALLOC_RESERVE = memparse(arg, &arg); |
282 | return 0; | |
1da177e4 | 283 | } |
1a3f239d | 284 | early_param("vmalloc", parse_vmalloc); |
1da177e4 | 285 | |
461a9aff ZA |
286 | /* |
287 | * reservetop=size reserves a hole at the top of the kernel address space which | |
288 | * a hypervisor can load into later. Needed for dynamically loaded hypervisors, | |
289 | * so relocating the fixmap can be done before paging initialization. | |
290 | */ | |
291 | static int __init parse_reservetop(char *arg) | |
292 | { | |
293 | unsigned long address; | |
294 | ||
295 | if (!arg) | |
296 | return -EINVAL; | |
297 | ||
298 | address = memparse(arg, &arg); | |
299 | reserve_top_address(address); | |
300 | return 0; | |
301 | } | |
302 | early_param("reservetop", parse_reservetop); | |
303 | ||
1da177e4 LT |
304 | /* |
305 | * Determine low and high memory ranges: | |
306 | */ | |
307 | unsigned long __init find_max_low_pfn(void) | |
308 | { | |
309 | unsigned long max_low_pfn; | |
310 | ||
311 | max_low_pfn = max_pfn; | |
312 | if (max_low_pfn > MAXMEM_PFN) { | |
313 | if (highmem_pages == -1) | |
314 | highmem_pages = max_pfn - MAXMEM_PFN; | |
315 | if (highmem_pages + MAXMEM_PFN < max_pfn) | |
316 | max_pfn = MAXMEM_PFN + highmem_pages; | |
317 | if (highmem_pages + MAXMEM_PFN > max_pfn) { | |
318 | printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages)); | |
319 | highmem_pages = 0; | |
320 | } | |
321 | max_low_pfn = MAXMEM_PFN; | |
322 | #ifndef CONFIG_HIGHMEM | |
323 | /* Maximum memory usable is what is directly addressable */ | |
324 | printk(KERN_WARNING "Warning only %ldMB will be used.\n", | |
325 | MAXMEM>>20); | |
326 | if (max_pfn > MAX_NONPAE_PFN) | |
c673f1a9 | 327 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 LT |
328 | else |
329 | printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); | |
330 | max_pfn = MAXMEM_PFN; | |
331 | #else /* !CONFIG_HIGHMEM */ | |
c673f1a9 | 332 | #ifndef CONFIG_HIGHMEM64G |
1da177e4 LT |
333 | if (max_pfn > MAX_NONPAE_PFN) { |
334 | max_pfn = MAX_NONPAE_PFN; | |
335 | printk(KERN_WARNING "Warning only 4GB will be used.\n"); | |
c673f1a9 | 336 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 | 337 | } |
c673f1a9 | 338 | #endif /* !CONFIG_HIGHMEM64G */ |
1da177e4 LT |
339 | #endif /* !CONFIG_HIGHMEM */ |
340 | } else { | |
341 | if (highmem_pages == -1) | |
342 | highmem_pages = 0; | |
343 | #ifdef CONFIG_HIGHMEM | |
344 | if (highmem_pages >= max_pfn) { | |
345 | printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn)); | |
346 | highmem_pages = 0; | |
347 | } | |
348 | if (highmem_pages) { | |
349 | if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){ | |
350 | printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages)); | |
351 | highmem_pages = 0; | |
352 | } | |
353 | max_low_pfn -= highmem_pages; | |
354 | } | |
355 | #else | |
356 | if (highmem_pages) | |
357 | printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n"); | |
358 | #endif | |
359 | } | |
360 | return max_low_pfn; | |
361 | } | |
362 | ||
05b79bdc | 363 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
a4928cff | 364 | static void __init setup_bootmem_allocator(void); |
1da177e4 LT |
365 | static unsigned long __init setup_memory(void) |
366 | { | |
367 | /* | |
368 | * partially used pages are not usable - thus | |
369 | * we are rounding upwards: | |
370 | */ | |
371 | min_low_pfn = PFN_UP(init_pg_tables_end); | |
372 | ||
1da177e4 LT |
373 | max_low_pfn = find_max_low_pfn(); |
374 | ||
375 | #ifdef CONFIG_HIGHMEM | |
376 | highstart_pfn = highend_pfn = max_pfn; | |
377 | if (max_pfn > max_low_pfn) { | |
378 | highstart_pfn = max_low_pfn; | |
379 | } | |
380 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", | |
381 | pages_to_mb(highend_pfn - highstart_pfn)); | |
ba9c231f JB |
382 | num_physpages = highend_pfn; |
383 | high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; | |
384 | #else | |
385 | num_physpages = max_low_pfn; | |
386 | high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; | |
387 | #endif | |
388 | #ifdef CONFIG_FLATMEM | |
389 | max_mapnr = num_physpages; | |
1da177e4 LT |
390 | #endif |
391 | printk(KERN_NOTICE "%ldMB LOWMEM available.\n", | |
392 | pages_to_mb(max_low_pfn)); | |
393 | ||
394 | setup_bootmem_allocator(); | |
395 | ||
396 | return max_low_pfn; | |
397 | } | |
398 | ||
a4928cff | 399 | static void __init zone_sizes_init(void) |
1da177e4 | 400 | { |
6391af17 MG |
401 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
402 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); | |
403 | max_zone_pfns[ZONE_DMA] = | |
404 | virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; | |
405 | max_zone_pfns[ZONE_NORMAL] = max_low_pfn; | |
1da177e4 | 406 | #ifdef CONFIG_HIGHMEM |
6391af17 | 407 | max_zone_pfns[ZONE_HIGHMEM] = highend_pfn; |
4cfee88a MG |
408 | add_active_range(0, 0, highend_pfn); |
409 | #else | |
4cfee88a | 410 | add_active_range(0, 0, max_low_pfn); |
1da177e4 | 411 | #endif |
4cfee88a MG |
412 | |
413 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
414 | } |
415 | #else | |
05b79bdc | 416 | extern unsigned long __init setup_memory(void); |
1da177e4 | 417 | extern void zone_sizes_init(void); |
05b79bdc | 418 | #endif /* !CONFIG_NEED_MULTIPLE_NODES */ |
1da177e4 | 419 | |
d62cc471 BW |
420 | static inline unsigned long long get_total_mem(void) |
421 | { | |
422 | unsigned long long total; | |
423 | ||
424 | total = max_low_pfn - min_low_pfn; | |
425 | #ifdef CONFIG_HIGHMEM | |
426 | total += highend_pfn - highstart_pfn; | |
427 | #endif | |
428 | ||
429 | return total << PAGE_SHIFT; | |
430 | } | |
431 | ||
432 | #ifdef CONFIG_KEXEC | |
433 | static void __init reserve_crashkernel(void) | |
434 | { | |
435 | unsigned long long total_mem; | |
436 | unsigned long long crash_size, crash_base; | |
437 | int ret; | |
438 | ||
439 | total_mem = get_total_mem(); | |
440 | ||
441 | ret = parse_crashkernel(boot_command_line, total_mem, | |
442 | &crash_size, &crash_base); | |
443 | if (ret == 0 && crash_size > 0) { | |
444 | if (crash_base > 0) { | |
445 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
446 | "for crashkernel (System RAM: %ldMB)\n", | |
447 | (unsigned long)(crash_size >> 20), | |
448 | (unsigned long)(crash_base >> 20), | |
449 | (unsigned long)(total_mem >> 20)); | |
450 | crashk_res.start = crash_base; | |
451 | crashk_res.end = crash_base + crash_size - 1; | |
72a7fe39 BW |
452 | reserve_bootmem(crash_base, crash_size, |
453 | BOOTMEM_DEFAULT); | |
d62cc471 BW |
454 | } else |
455 | printk(KERN_INFO "crashkernel reservation failed - " | |
456 | "you have to specify a base address\n"); | |
457 | } | |
458 | } | |
459 | #else | |
460 | static inline void __init reserve_crashkernel(void) | |
461 | {} | |
462 | #endif | |
463 | ||
cf8fa920 PA |
464 | #ifdef CONFIG_BLK_DEV_INITRD |
465 | ||
466 | static bool do_relocate_initrd = false; | |
467 | ||
468 | static void __init reserve_initrd(void) | |
469 | { | |
ba5b14cc YL |
470 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
471 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
472 | u64 ramdisk_end = ramdisk_image + ramdisk_size; | |
473 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
474 | u64 ramdisk_here; | |
cf8fa920 | 475 | |
cf8fa920 PA |
476 | if (!boot_params.hdr.type_of_loader || |
477 | !ramdisk_image || !ramdisk_size) | |
478 | return; /* No initrd provided by bootloader */ | |
479 | ||
a4c81cf6 YL |
480 | initrd_start = 0; |
481 | ||
cf8fa920 | 482 | if (ramdisk_size >= end_of_lowmem/2) { |
3945e2c9 | 483 | free_early(ramdisk_image, ramdisk_end); |
cf8fa920 PA |
484 | printk(KERN_ERR "initrd too large to handle, " |
485 | "disabling initrd\n"); | |
486 | return; | |
487 | } | |
a4c81cf6 | 488 | |
f0d43100 YL |
489 | printk(KERN_INFO "old RAMDISK: %08llx - %08llx\n", ramdisk_image, |
490 | ramdisk_end); | |
491 | ||
492 | ||
cf8fa920 PA |
493 | if (ramdisk_end <= end_of_lowmem) { |
494 | /* All in lowmem, easy case */ | |
a4c81cf6 YL |
495 | /* |
496 | * don't need to reserve again, already reserved early | |
ba5b14cc | 497 | * in i386_start_kernel |
a4c81cf6 | 498 | */ |
cf8fa920 PA |
499 | initrd_start = ramdisk_image + PAGE_OFFSET; |
500 | initrd_end = initrd_start+ramdisk_size; | |
501 | return; | |
502 | } | |
503 | ||
504 | /* We need to move the initrd down into lowmem */ | |
ba5b14cc YL |
505 | ramdisk_here = find_e820_area(min_low_pfn<<PAGE_SHIFT, |
506 | end_of_lowmem, ramdisk_size, | |
507 | PAGE_SIZE); | |
cf8fa920 | 508 | |
3945e2c9 YL |
509 | if (ramdisk_here == -1ULL) |
510 | panic("Cannot find place for new RAMDISK of size %lld\n", | |
511 | ramdisk_size); | |
512 | ||
cf8fa920 PA |
513 | /* Note: this includes all the lowmem currently occupied by |
514 | the initrd, we rely on that fact to keep the data intact. */ | |
3945e2c9 | 515 | reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, |
ba5b14cc | 516 | "NEW RAMDISK"); |
cf8fa920 PA |
517 | initrd_start = ramdisk_here + PAGE_OFFSET; |
518 | initrd_end = initrd_start + ramdisk_size; | |
f0d43100 YL |
519 | printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", |
520 | ramdisk_here, ramdisk_here + ramdisk_size); | |
cf8fa920 PA |
521 | |
522 | do_relocate_initrd = true; | |
523 | } | |
524 | ||
525 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) | |
526 | ||
527 | static void __init relocate_initrd(void) | |
528 | { | |
ba5b14cc YL |
529 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
530 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
531 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
532 | u64 ramdisk_here; | |
cf8fa920 PA |
533 | unsigned long slop, clen, mapaddr; |
534 | char *p, *q; | |
535 | ||
536 | if (!do_relocate_initrd) | |
537 | return; | |
538 | ||
539 | ramdisk_here = initrd_start - PAGE_OFFSET; | |
540 | ||
541 | q = (char *)initrd_start; | |
542 | ||
543 | /* Copy any lowmem portion of the initrd */ | |
544 | if (ramdisk_image < end_of_lowmem) { | |
545 | clen = end_of_lowmem - ramdisk_image; | |
546 | p = (char *)__va(ramdisk_image); | |
547 | memcpy(q, p, clen); | |
548 | q += clen; | |
a4c81cf6 | 549 | /* need to free these low pages...*/ |
ba5b14cc YL |
550 | printk(KERN_INFO "Freeing old partial RAMDISK %08llx-%08llx\n", |
551 | ramdisk_image, ramdisk_image + clen - 1); | |
a4c81cf6 | 552 | free_bootmem(ramdisk_image, clen); |
cf8fa920 PA |
553 | ramdisk_image += clen; |
554 | ramdisk_size -= clen; | |
555 | } | |
556 | ||
557 | /* Copy the highmem portion of the initrd */ | |
558 | while (ramdisk_size) { | |
559 | slop = ramdisk_image & ~PAGE_MASK; | |
560 | clen = ramdisk_size; | |
561 | if (clen > MAX_MAP_CHUNK-slop) | |
562 | clen = MAX_MAP_CHUNK-slop; | |
563 | mapaddr = ramdisk_image & PAGE_MASK; | |
beacfaac | 564 | p = early_ioremap(mapaddr, clen+slop); |
cf8fa920 | 565 | memcpy(q, p+slop, clen); |
beacfaac | 566 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
567 | q += clen; |
568 | ramdisk_image += clen; | |
569 | ramdisk_size -= clen; | |
570 | } | |
a4c81cf6 | 571 | /* high pages is not converted by early_res_to_bootmem */ |
ba5b14cc YL |
572 | ramdisk_image = boot_params.hdr.ramdisk_image; |
573 | ramdisk_size = boot_params.hdr.ramdisk_size; | |
574 | printk(KERN_INFO "Copied RAMDISK from %016llx - %016llx to %08llx - %08llx\n", | |
575 | ramdisk_image, ramdisk_image + ramdisk_size - 1, | |
576 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
cf8fa920 PA |
577 | } |
578 | ||
579 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
580 | ||
1da177e4 LT |
581 | void __init setup_bootmem_allocator(void) |
582 | { | |
a4c81cf6 | 583 | unsigned long bootmap_size, bootmap; |
1da177e4 LT |
584 | /* |
585 | * Initialize the boot-time allocator (with low memory only): | |
586 | */ | |
a4c81cf6 YL |
587 | bootmap_size = bootmem_bootmap_pages(max_low_pfn)<<PAGE_SHIFT; |
588 | bootmap = find_e820_area(min_low_pfn<<PAGE_SHIFT, | |
589 | max_low_pfn<<PAGE_SHIFT, bootmap_size, | |
590 | PAGE_SIZE); | |
591 | if (bootmap == -1L) | |
592 | panic("Cannot find bootmem map of size %ld\n", bootmap_size); | |
3945e2c9 | 593 | reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP"); |
ba5b14cc YL |
594 | #ifdef CONFIG_BLK_DEV_INITRD |
595 | reserve_initrd(); | |
596 | #endif | |
a4c81cf6 | 597 | bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, max_low_pfn); |
ba5b14cc YL |
598 | printk(KERN_INFO " low ram: %08lx - %08lx\n", |
599 | min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT); | |
3945e2c9 YL |
600 | printk(KERN_INFO " bootmap %08lx - %08lx\n", |
601 | bootmap, bootmap + bootmap_size); | |
1da177e4 | 602 | register_bootmem_low_pages(max_low_pfn); |
a4c81cf6 | 603 | early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT); |
1da177e4 | 604 | |
673d5b43 | 605 | #ifdef CONFIG_ACPI_SLEEP |
1da177e4 LT |
606 | /* |
607 | * Reserve low memory region for sleep support. | |
608 | */ | |
609 | acpi_reserve_bootmem(); | |
610 | #endif | |
611 | #ifdef CONFIG_X86_FIND_SMP_CONFIG | |
612 | /* | |
613 | * Find and reserve possible boot-time SMP configuration: | |
614 | */ | |
615 | find_smp_config(); | |
1da177e4 | 616 | #endif |
cf8fa920 | 617 | numa_kva_reserve(); |
d62cc471 | 618 | reserve_crashkernel(); |
138fe4e0 KR |
619 | |
620 | reserve_ibft_region(); | |
1da177e4 LT |
621 | } |
622 | ||
623 | /* | |
624 | * The node 0 pgdat is initialized before all of these because | |
625 | * it's needed for bootmem. node>0 pgdats have their virtual | |
626 | * space allocated before the pagetables are in place to access | |
627 | * them, so they can't be cleared then. | |
628 | * | |
629 | * This should all compile down to nothing when NUMA is off. | |
630 | */ | |
10079ae3 | 631 | static void __init remapped_pgdat_init(void) |
1da177e4 LT |
632 | { |
633 | int nid; | |
634 | ||
635 | for_each_online_node(nid) { | |
636 | if (nid != 0) | |
637 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
638 | } | |
639 | } | |
640 | ||
1da177e4 LT |
641 | #ifdef CONFIG_MCA |
642 | static void set_mca_bus(int x) | |
643 | { | |
644 | MCA_bus = x; | |
645 | } | |
646 | #else | |
647 | static void set_mca_bus(int x) { } | |
648 | #endif | |
649 | ||
ccf82085 GOC |
650 | #ifdef CONFIG_NUMA |
651 | /* | |
652 | * In the golden day, when everything among i386 and x86_64 will be | |
653 | * integrated, this will not live here | |
654 | */ | |
655 | void *x86_cpu_to_node_map_early_ptr; | |
656 | int x86_cpu_to_node_map_init[NR_CPUS] = { | |
657 | [0 ... NR_CPUS-1] = NUMA_NO_NODE | |
658 | }; | |
659 | DEFINE_PER_CPU(int, x86_cpu_to_node_map) = NUMA_NO_NODE; | |
660 | #endif | |
661 | ||
1da177e4 LT |
662 | /* |
663 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
664 | * passed the efi memmap, systab, etc., so we should use these data structures | |
665 | * for initialization. Note, the efi init code path is determined by the | |
666 | * global efi_enabled. This allows the same kernel image to be used on existing | |
667 | * systems (with a traditional BIOS) as well as on EFI systems. | |
668 | */ | |
669 | void __init setup_arch(char **cmdline_p) | |
670 | { | |
671 | unsigned long max_low_pfn; | |
672 | ||
673 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); | |
674 | pre_setup_arch_hook(); | |
675 | early_cpu_init(); | |
beacfaac | 676 | early_ioremap_init(); |
1da177e4 | 677 | |
1da177e4 | 678 | #ifdef CONFIG_EFI |
e429795c HY |
679 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, |
680 | "EL32", 4)) | |
1da177e4 LT |
681 | efi_enabled = 1; |
682 | #endif | |
683 | ||
30c82645 PA |
684 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
685 | screen_info = boot_params.screen_info; | |
686 | edid_info = boot_params.edid_info; | |
687 | apm_info.bios = boot_params.apm_bios_info; | |
688 | ist_info = boot_params.ist_info; | |
e44b7b75 | 689 | saved_video_mode = boot_params.hdr.vid_mode; |
30c82645 PA |
690 | if( boot_params.sys_desc_table.length != 0 ) { |
691 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); | |
692 | machine_id = boot_params.sys_desc_table.table[0]; | |
693 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
694 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 695 | } |
30c82645 | 696 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
697 | |
698 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
699 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
700 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
701 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 LT |
702 | #endif |
703 | ARCH_SETUP | |
2215e69d | 704 | |
0dbfafa5 | 705 | setup_memory_map(); |
2215e69d | 706 | |
1da177e4 LT |
707 | copy_edd(); |
708 | ||
30c82645 | 709 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
710 | root_mountflags &= ~MS_RDONLY; |
711 | init_mm.start_code = (unsigned long) _text; | |
712 | init_mm.end_code = (unsigned long) _etext; | |
713 | init_mm.end_data = (unsigned long) _edata; | |
714 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; | |
715 | ||
716 | code_resource.start = virt_to_phys(_text); | |
717 | code_resource.end = virt_to_phys(_etext)-1; | |
718 | data_resource.start = virt_to_phys(_etext); | |
719 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
720 | bss_resource.start = virt_to_phys(&__bss_start); |
721 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 722 | |
1a3f239d | 723 | parse_early_param(); |
1da177e4 | 724 | |
0dbfafa5 | 725 | finish_e820_parsing(); |
1a3f239d | 726 | |
4e498b66 | 727 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
1a3f239d | 728 | *cmdline_p = command_line; |
99b7de33 | 729 | |
8b2cb7a8 HY |
730 | if (efi_enabled) |
731 | efi_init(); | |
732 | ||
093af8d7 | 733 | /* update e820 for memory not covered by WB MTRRs */ |
fa5c4639 | 734 | propagate_e820_map(); |
093af8d7 YL |
735 | mtrr_bp_init(); |
736 | if (mtrr_trim_uncached_memory(max_pfn)) | |
fa5c4639 | 737 | propagate_e820_map(); |
76c32418 YL |
738 | |
739 | max_low_pfn = setup_memory(); | |
093af8d7 | 740 | |
790c73f6 GOC |
741 | #ifdef CONFIG_KVM_CLOCK |
742 | kvmclock_init(); | |
743 | #endif | |
744 | ||
7ce0bcfd ZA |
745 | #ifdef CONFIG_VMI |
746 | /* | |
747 | * Must be after max_low_pfn is determined, and before kernel | |
748 | * pagetables are setup. | |
749 | */ | |
750 | vmi_init(); | |
751 | #endif | |
0cf1bfd2 | 752 | kvm_guest_init(); |
7ce0bcfd | 753 | |
1da177e4 LT |
754 | /* |
755 | * NOTE: before this point _nobody_ is allowed to allocate | |
756 | * any memory using the bootmem allocator. Although the | |
27b46d76 | 757 | * allocator is now initialised only the first 8Mb of the kernel |
1da177e4 LT |
758 | * virtual address space has been mapped. All allocations before |
759 | * paging_init() has completed must use the alloc_bootmem_low_pages() | |
760 | * variant (which allocates DMA'able memory) and care must be taken | |
761 | * not to exceed the 8Mb limit. | |
762 | */ | |
763 | ||
1da177e4 | 764 | paging_init(); |
f212ec4b BK |
765 | |
766 | /* | |
767 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
768 | */ | |
769 | ||
770 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
771 | if (init_ohci1394_dma_early) | |
772 | init_ohci1394_dma_on_all_controllers(); | |
773 | #endif | |
774 | ||
1da177e4 | 775 | remapped_pgdat_init(); |
05b79bdc | 776 | sparse_init(); |
1da177e4 LT |
777 | zone_sizes_init(); |
778 | ||
779 | /* | |
780 | * NOTE: at this point the bootmem allocator is fully available. | |
781 | */ | |
782 | ||
cf8fa920 PA |
783 | #ifdef CONFIG_BLK_DEV_INITRD |
784 | relocate_initrd(); | |
785 | #endif | |
786 | ||
6996d3b6 JF |
787 | paravirt_post_allocator_init(); |
788 | ||
1da177e4 LT |
789 | dmi_scan_machine(); |
790 | ||
cf8fa920 | 791 | io_delay_init(); |
b02aae9c | 792 | |
ccf82085 GOC |
793 | #ifdef CONFIG_X86_SMP |
794 | /* | |
795 | * setup to use the early static init tables during kernel startup | |
796 | * X86_SMP will exclude sub-arches that don't deal well with it. | |
797 | */ | |
798 | x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init; | |
799 | x86_bios_cpu_apicid_early_ptr = (void *)x86_bios_cpu_apicid_init; | |
800 | #ifdef CONFIG_NUMA | |
801 | x86_cpu_to_node_map_early_ptr = (void *)x86_cpu_to_node_map_init; | |
802 | #endif | |
803 | #endif | |
804 | ||
1da177e4 | 805 | #ifdef CONFIG_X86_GENERICARCH |
1a3f239d | 806 | generic_apic_probe(); |
cf8fa920 | 807 | #endif |
1da177e4 | 808 | |
888ba6c6 | 809 | #ifdef CONFIG_ACPI |
1da177e4 LT |
810 | /* |
811 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
812 | */ | |
813 | acpi_boot_table_init(); | |
d44647b0 AC |
814 | #endif |
815 | ||
54ef3400 | 816 | early_quirks(); |
d44647b0 AC |
817 | |
818 | #ifdef CONFIG_ACPI | |
1da177e4 LT |
819 | acpi_boot_init(); |
820 | ||
911a62d4 VP |
821 | #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) |
822 | if (def_to_bigsmp) | |
823 | printk(KERN_WARNING "More than 8 CPUs detected and " | |
824 | "CONFIG_X86_PC cannot handle it.\nUse " | |
825 | "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); | |
826 | #endif | |
827 | #endif | |
136ef671 | 828 | #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS) |
1da177e4 LT |
829 | if (smp_found_config) |
830 | get_smp_config(); | |
831 | #endif | |
832 | ||
b79cd8f1 | 833 | e820_setup_gap(); |
bf62f398 | 834 | e820_mark_nosave_regions(max_low_pfn); |
1da177e4 LT |
835 | |
836 | #ifdef CONFIG_VT | |
837 | #if defined(CONFIG_VGA_CONSOLE) | |
838 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
839 | conswitchp = &vga_con; | |
840 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
841 | conswitchp = &dummy_con; | |
842 | #endif | |
843 | #endif | |
844 | } | |
c9cce83d BW |
845 | |
846 | /* | |
847 | * Request address space for all standard resources | |
848 | * | |
849 | * This is called just before pcibios_init(), which is also a | |
850 | * subsys_initcall, but is linked in later (in arch/i386/pci/common.c). | |
851 | */ | |
852 | static int __init request_standard_resources(void) | |
853 | { | |
854 | int i; | |
855 | ||
856 | printk(KERN_INFO "Setting up standard PCI resources\n"); | |
2215e69d | 857 | init_iomem_resources(&code_resource, &data_resource, &bss_resource); |
c9cce83d | 858 | |
c9cce83d BW |
859 | request_resource(&iomem_resource, &video_ram_resource); |
860 | ||
861 | /* request I/O space for devices used on all i[345]86 PCs */ | |
862 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
863 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
864 | return 0; | |
865 | } | |
866 | ||
867 | subsys_initcall(request_standard_resources); |