]>
Commit | Line | Data |
---|---|---|
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! */ | |
74 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
75 | ||
1da177e4 LT |
76 | /* |
77 | * Machine setup.. | |
78 | */ | |
c9cce83d BW |
79 | static struct resource data_resource = { |
80 | .name = "Kernel data", | |
81 | .start = 0, | |
82 | .end = 0, | |
83 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
84 | }; | |
85 | ||
86 | static struct resource code_resource = { | |
87 | .name = "Kernel code", | |
88 | .start = 0, | |
89 | .end = 0, | |
90 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
91 | }; | |
92 | ||
93 | static struct resource bss_resource = { | |
94 | .name = "Kernel bss", | |
95 | .start = 0, | |
96 | .end = 0, | |
97 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
98 | }; | |
99 | ||
100 | static struct resource video_ram_resource = { | |
101 | .name = "Video RAM area", | |
102 | .start = 0xa0000, | |
103 | .end = 0xbffff, | |
104 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
105 | }; | |
106 | ||
107 | static struct resource standard_io_resources[] = { { | |
108 | .name = "dma1", | |
109 | .start = 0x0000, | |
110 | .end = 0x001f, | |
111 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
112 | }, { | |
113 | .name = "pic1", | |
114 | .start = 0x0020, | |
115 | .end = 0x0021, | |
116 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
117 | }, { | |
118 | .name = "timer0", | |
119 | .start = 0x0040, | |
120 | .end = 0x0043, | |
121 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
122 | }, { | |
123 | .name = "timer1", | |
124 | .start = 0x0050, | |
125 | .end = 0x0053, | |
126 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
127 | }, { | |
128 | .name = "keyboard", | |
129 | .start = 0x0060, | |
9096bd7a HW |
130 | .end = 0x0060, |
131 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
132 | }, { | |
133 | .name = "keyboard", | |
134 | .start = 0x0064, | |
135 | .end = 0x0064, | |
c9cce83d BW |
136 | .flags = IORESOURCE_BUSY | IORESOURCE_IO |
137 | }, { | |
138 | .name = "dma page reg", | |
139 | .start = 0x0080, | |
140 | .end = 0x008f, | |
141 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
142 | }, { | |
143 | .name = "pic2", | |
144 | .start = 0x00a0, | |
145 | .end = 0x00a1, | |
146 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
147 | }, { | |
148 | .name = "dma2", | |
149 | .start = 0x00c0, | |
150 | .end = 0x00df, | |
151 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
152 | }, { | |
153 | .name = "fpu", | |
154 | .start = 0x00f0, | |
155 | .end = 0x00ff, | |
156 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
157 | } }; | |
1da177e4 LT |
158 | |
159 | /* cpu data as detected by the assembly code in head.S */ | |
4a5d107a | 160 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
1da177e4 | 161 | /* common cpu data for all cpus */ |
c3d8c141 | 162 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
129f6946 | 163 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 | 164 | |
0c254e38 AS |
165 | unsigned int def_to_bigsmp; |
166 | ||
551889a6 | 167 | #ifndef CONFIG_X86_PAE |
1da177e4 | 168 | unsigned long mmu_cr4_features; |
551889a6 IC |
169 | #else |
170 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
171 | #endif | |
1da177e4 | 172 | |
1da177e4 LT |
173 | /* for MCA, but anyone else can use it if they want */ |
174 | unsigned int machine_id; | |
175 | unsigned int machine_submodel_id; | |
176 | unsigned int BIOS_revision; | |
1da177e4 | 177 | |
1da177e4 LT |
178 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
179 | int bootloader_type; | |
180 | ||
181 | /* user-defined highmem size */ | |
182 | static unsigned int highmem_pages = -1; | |
183 | ||
184 | /* | |
185 | * Setup options | |
186 | */ | |
1da177e4 | 187 | struct screen_info screen_info; |
129f6946 | 188 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 189 | struct apm_info apm_info; |
129f6946 | 190 | EXPORT_SYMBOL(apm_info); |
1da177e4 | 191 | struct edid_info edid_info; |
5e518d76 | 192 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 193 | struct ist_info ist_info; |
129f6946 AD |
194 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
195 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
196 | EXPORT_SYMBOL(ist_info); | |
197 | #endif | |
1da177e4 LT |
198 | |
199 | extern void early_cpu_init(void); | |
1da177e4 LT |
200 | extern int root_mountflags; |
201 | ||
e44b7b75 | 202 | unsigned long saved_video_mode; |
1da177e4 | 203 | |
cf8fa920 | 204 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 205 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 206 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 207 | |
4e498b66 | 208 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 | 209 | |
6d7d7433 | 210 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
48c7ae67 | 211 | struct boot_params __initdata boot_params; |
6d7d7433 HY |
212 | #else |
213 | struct boot_params boot_params; | |
214 | #endif | |
1da177e4 | 215 | |
1da177e4 LT |
216 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
217 | struct edd edd; | |
218 | #ifdef CONFIG_EDD_MODULE | |
219 | EXPORT_SYMBOL(edd); | |
220 | #endif | |
221 | /** | |
222 | * copy_edd() - Copy the BIOS EDD information | |
223 | * from boot_params into a safe place. | |
224 | * | |
225 | */ | |
226 | static inline void copy_edd(void) | |
227 | { | |
30c82645 PA |
228 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
229 | sizeof(edd.mbr_signature)); | |
230 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
231 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
232 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
233 | } |
234 | #else | |
235 | static inline void copy_edd(void) | |
236 | { | |
237 | } | |
238 | #endif | |
239 | ||
537d9160 | 240 | int __initdata user_defined_memmap; |
1da177e4 | 241 | |
1a3f239d RR |
242 | /* |
243 | * "mem=nopentium" disables the 4MB page tables. | |
244 | * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM | |
245 | * to <mem>, overriding the bios size. | |
246 | * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from | |
247 | * <start> to <start>+<mem>, overriding the bios size. | |
248 | * | |
249 | * HPA tells me bootloaders need to parse mem=, so no new | |
250 | * option should be mem= [also see Documentation/i386/boot.txt] | |
251 | */ | |
252 | static int __init parse_mem(char *arg) | |
253 | { | |
254 | if (!arg) | |
255 | return -EINVAL; | |
1da177e4 | 256 | |
1a3f239d | 257 | if (strcmp(arg, "nopentium") == 0) { |
13530257 | 258 | setup_clear_cpu_cap(X86_FEATURE_PSE); |
1a3f239d RR |
259 | } else { |
260 | /* If the user specifies memory size, we | |
261 | * limit the BIOS-provided memory map to | |
262 | * that size. exactmap can be used to specify | |
263 | * the exact map. mem=number can be used to | |
264 | * trim the existing memory map. | |
1da177e4 | 265 | */ |
1a3f239d | 266 | unsigned long long mem_size; |
cf8fa920 | 267 | |
1a3f239d RR |
268 | mem_size = memparse(arg, &arg); |
269 | limit_regions(mem_size); | |
270 | user_defined_memmap = 1; | |
271 | } | |
272 | return 0; | |
273 | } | |
274 | early_param("mem", parse_mem); | |
1da177e4 | 275 | |
1a3f239d RR |
276 | #ifdef CONFIG_PROC_VMCORE |
277 | /* elfcorehdr= specifies the location of elf core header | |
278 | * stored by the crashed kernel. | |
279 | */ | |
280 | static int __init parse_elfcorehdr(char *arg) | |
281 | { | |
282 | if (!arg) | |
283 | return -EINVAL; | |
66759a01 | 284 | |
1a3f239d RR |
285 | elfcorehdr_addr = memparse(arg, &arg); |
286 | return 0; | |
287 | } | |
288 | early_param("elfcorehdr", parse_elfcorehdr); | |
289 | #endif /* CONFIG_PROC_VMCORE */ | |
1da177e4 | 290 | |
1a3f239d RR |
291 | /* |
292 | * highmem=size forces highmem to be exactly 'size' bytes. | |
293 | * This works even on boxes that have no highmem otherwise. | |
294 | * This also works to reduce highmem size on bigger boxes. | |
295 | */ | |
296 | static int __init parse_highmem(char *arg) | |
297 | { | |
298 | if (!arg) | |
299 | return -EINVAL; | |
9635b47d | 300 | |
1a3f239d RR |
301 | highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT; |
302 | return 0; | |
303 | } | |
304 | early_param("highmem", parse_highmem); | |
9635b47d | 305 | |
1a3f239d RR |
306 | /* |
307 | * vmalloc=size forces the vmalloc area to be exactly 'size' | |
308 | * bytes. This can be used to increase (or decrease) the | |
309 | * vmalloc area - the default is 128m. | |
310 | */ | |
311 | static int __init parse_vmalloc(char *arg) | |
312 | { | |
313 | if (!arg) | |
314 | return -EINVAL; | |
1bc3b91a | 315 | |
1a3f239d RR |
316 | __VMALLOC_RESERVE = memparse(arg, &arg); |
317 | return 0; | |
1da177e4 | 318 | } |
1a3f239d | 319 | early_param("vmalloc", parse_vmalloc); |
1da177e4 | 320 | |
461a9aff ZA |
321 | /* |
322 | * reservetop=size reserves a hole at the top of the kernel address space which | |
323 | * a hypervisor can load into later. Needed for dynamically loaded hypervisors, | |
324 | * so relocating the fixmap can be done before paging initialization. | |
325 | */ | |
326 | static int __init parse_reservetop(char *arg) | |
327 | { | |
328 | unsigned long address; | |
329 | ||
330 | if (!arg) | |
331 | return -EINVAL; | |
332 | ||
333 | address = memparse(arg, &arg); | |
334 | reserve_top_address(address); | |
335 | return 0; | |
336 | } | |
337 | early_param("reservetop", parse_reservetop); | |
338 | ||
1da177e4 LT |
339 | /* |
340 | * Determine low and high memory ranges: | |
341 | */ | |
342 | unsigned long __init find_max_low_pfn(void) | |
343 | { | |
344 | unsigned long max_low_pfn; | |
345 | ||
346 | max_low_pfn = max_pfn; | |
347 | if (max_low_pfn > MAXMEM_PFN) { | |
348 | if (highmem_pages == -1) | |
349 | highmem_pages = max_pfn - MAXMEM_PFN; | |
350 | if (highmem_pages + MAXMEM_PFN < max_pfn) | |
351 | max_pfn = MAXMEM_PFN + highmem_pages; | |
352 | if (highmem_pages + MAXMEM_PFN > max_pfn) { | |
353 | printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages)); | |
354 | highmem_pages = 0; | |
355 | } | |
356 | max_low_pfn = MAXMEM_PFN; | |
357 | #ifndef CONFIG_HIGHMEM | |
358 | /* Maximum memory usable is what is directly addressable */ | |
359 | printk(KERN_WARNING "Warning only %ldMB will be used.\n", | |
360 | MAXMEM>>20); | |
361 | if (max_pfn > MAX_NONPAE_PFN) | |
c673f1a9 | 362 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 LT |
363 | else |
364 | printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); | |
365 | max_pfn = MAXMEM_PFN; | |
366 | #else /* !CONFIG_HIGHMEM */ | |
c673f1a9 | 367 | #ifndef CONFIG_HIGHMEM64G |
1da177e4 LT |
368 | if (max_pfn > MAX_NONPAE_PFN) { |
369 | max_pfn = MAX_NONPAE_PFN; | |
370 | printk(KERN_WARNING "Warning only 4GB will be used.\n"); | |
c673f1a9 | 371 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 | 372 | } |
c673f1a9 | 373 | #endif /* !CONFIG_HIGHMEM64G */ |
1da177e4 LT |
374 | #endif /* !CONFIG_HIGHMEM */ |
375 | } else { | |
376 | if (highmem_pages == -1) | |
377 | highmem_pages = 0; | |
378 | #ifdef CONFIG_HIGHMEM | |
379 | if (highmem_pages >= max_pfn) { | |
380 | printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn)); | |
381 | highmem_pages = 0; | |
382 | } | |
383 | if (highmem_pages) { | |
384 | if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){ | |
385 | printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages)); | |
386 | highmem_pages = 0; | |
387 | } | |
388 | max_low_pfn -= highmem_pages; | |
389 | } | |
390 | #else | |
391 | if (highmem_pages) | |
392 | printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n"); | |
393 | #endif | |
394 | } | |
395 | return max_low_pfn; | |
396 | } | |
397 | ||
dedd04be AH |
398 | #define BIOS_LOWMEM_KILOBYTES 0x413 |
399 | ||
1da177e4 | 400 | /* |
dedd04be AH |
401 | * The BIOS places the EBDA/XBDA at the top of conventional |
402 | * memory, and usually decreases the reported amount of | |
403 | * conventional memory (int 0x12) too. This also contains a | |
404 | * workaround for Dell systems that neglect to reserve EBDA. | |
405 | * The same workaround also avoids a problem with the AMD768MPX | |
406 | * chipset: reserve a page before VGA to prevent PCI prefetch | |
407 | * into it (errata #56). Usually the page is reserved anyways, | |
408 | * unless you have no PS/2 mouse plugged in. | |
1da177e4 LT |
409 | */ |
410 | static void __init reserve_ebda_region(void) | |
411 | { | |
dedd04be AH |
412 | unsigned int lowmem, ebda_addr; |
413 | ||
414 | /* To determine the position of the EBDA and the */ | |
415 | /* end of conventional memory, we need to look at */ | |
416 | /* the BIOS data area. In a paravirtual environment */ | |
417 | /* that area is absent. We'll just have to assume */ | |
418 | /* that the paravirt case can handle memory setup */ | |
419 | /* correctly, without our help. */ | |
2fde61fd | 420 | if (paravirt_enabled()) |
dedd04be | 421 | return; |
dedd04be AH |
422 | |
423 | /* end of low (conventional) memory */ | |
424 | lowmem = *(unsigned short *)__va(BIOS_LOWMEM_KILOBYTES); | |
425 | lowmem <<= 10; | |
426 | ||
427 | /* start of EBDA area */ | |
356fa0c6 | 428 | ebda_addr = get_bios_ebda(); |
dedd04be AH |
429 | |
430 | /* Fixup: bios puts an EBDA in the top 64K segment */ | |
431 | /* of conventional memory, but does not adjust lowmem. */ | |
432 | if ((lowmem - ebda_addr) <= 0x10000) | |
433 | lowmem = ebda_addr; | |
434 | ||
435 | /* Fixup: bios does not report an EBDA at all. */ | |
436 | /* Some old Dells seem to need 4k anyhow (bugzilla 2990) */ | |
437 | if ((ebda_addr == 0) && (lowmem >= 0x9f000)) | |
438 | lowmem = 0x9f000; | |
439 | ||
440 | /* Paranoia: should never happen, but... */ | |
441 | if ((lowmem == 0) || (lowmem >= 0x100000)) | |
442 | lowmem = 0x9f000; | |
443 | ||
444 | /* reserve all memory between lowmem and the 1MB mark */ | |
445 | reserve_bootmem(lowmem, 0x100000 - lowmem, BOOTMEM_DEFAULT); | |
1da177e4 LT |
446 | } |
447 | ||
05b79bdc | 448 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
a4928cff | 449 | static void __init setup_bootmem_allocator(void); |
1da177e4 LT |
450 | static unsigned long __init setup_memory(void) |
451 | { | |
452 | /* | |
453 | * partially used pages are not usable - thus | |
454 | * we are rounding upwards: | |
455 | */ | |
456 | min_low_pfn = PFN_UP(init_pg_tables_end); | |
457 | ||
1da177e4 LT |
458 | max_low_pfn = find_max_low_pfn(); |
459 | ||
460 | #ifdef CONFIG_HIGHMEM | |
461 | highstart_pfn = highend_pfn = max_pfn; | |
462 | if (max_pfn > max_low_pfn) { | |
463 | highstart_pfn = max_low_pfn; | |
464 | } | |
465 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", | |
466 | pages_to_mb(highend_pfn - highstart_pfn)); | |
ba9c231f JB |
467 | num_physpages = highend_pfn; |
468 | high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; | |
469 | #else | |
470 | num_physpages = max_low_pfn; | |
471 | high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; | |
472 | #endif | |
473 | #ifdef CONFIG_FLATMEM | |
474 | max_mapnr = num_physpages; | |
1da177e4 LT |
475 | #endif |
476 | printk(KERN_NOTICE "%ldMB LOWMEM available.\n", | |
477 | pages_to_mb(max_low_pfn)); | |
478 | ||
479 | setup_bootmem_allocator(); | |
480 | ||
481 | return max_low_pfn; | |
482 | } | |
483 | ||
a4928cff | 484 | static void __init zone_sizes_init(void) |
1da177e4 | 485 | { |
6391af17 MG |
486 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
487 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); | |
488 | max_zone_pfns[ZONE_DMA] = | |
489 | virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; | |
490 | max_zone_pfns[ZONE_NORMAL] = max_low_pfn; | |
1da177e4 | 491 | #ifdef CONFIG_HIGHMEM |
6391af17 | 492 | max_zone_pfns[ZONE_HIGHMEM] = highend_pfn; |
4cfee88a MG |
493 | add_active_range(0, 0, highend_pfn); |
494 | #else | |
4cfee88a | 495 | add_active_range(0, 0, max_low_pfn); |
1da177e4 | 496 | #endif |
4cfee88a MG |
497 | |
498 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
499 | } |
500 | #else | |
05b79bdc | 501 | extern unsigned long __init setup_memory(void); |
1da177e4 | 502 | extern void zone_sizes_init(void); |
05b79bdc | 503 | #endif /* !CONFIG_NEED_MULTIPLE_NODES */ |
1da177e4 | 504 | |
d62cc471 BW |
505 | static inline unsigned long long get_total_mem(void) |
506 | { | |
507 | unsigned long long total; | |
508 | ||
509 | total = max_low_pfn - min_low_pfn; | |
510 | #ifdef CONFIG_HIGHMEM | |
511 | total += highend_pfn - highstart_pfn; | |
512 | #endif | |
513 | ||
514 | return total << PAGE_SHIFT; | |
515 | } | |
516 | ||
517 | #ifdef CONFIG_KEXEC | |
518 | static void __init reserve_crashkernel(void) | |
519 | { | |
520 | unsigned long long total_mem; | |
521 | unsigned long long crash_size, crash_base; | |
522 | int ret; | |
523 | ||
524 | total_mem = get_total_mem(); | |
525 | ||
526 | ret = parse_crashkernel(boot_command_line, total_mem, | |
527 | &crash_size, &crash_base); | |
528 | if (ret == 0 && crash_size > 0) { | |
529 | if (crash_base > 0) { | |
530 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
531 | "for crashkernel (System RAM: %ldMB)\n", | |
532 | (unsigned long)(crash_size >> 20), | |
533 | (unsigned long)(crash_base >> 20), | |
534 | (unsigned long)(total_mem >> 20)); | |
d3942cff BW |
535 | |
536 | if (reserve_bootmem(crash_base, crash_size, | |
537 | BOOTMEM_EXCLUSIVE) < 0) { | |
538 | printk(KERN_INFO "crashkernel reservation " | |
539 | "failed - memory is in use\n"); | |
540 | return; | |
541 | } | |
542 | ||
d62cc471 BW |
543 | crashk_res.start = crash_base; |
544 | crashk_res.end = crash_base + crash_size - 1; | |
d62cc471 BW |
545 | } else |
546 | printk(KERN_INFO "crashkernel reservation failed - " | |
547 | "you have to specify a base address\n"); | |
548 | } | |
549 | } | |
550 | #else | |
551 | static inline void __init reserve_crashkernel(void) | |
552 | {} | |
553 | #endif | |
554 | ||
cf8fa920 PA |
555 | #ifdef CONFIG_BLK_DEV_INITRD |
556 | ||
557 | static bool do_relocate_initrd = false; | |
558 | ||
559 | static void __init reserve_initrd(void) | |
560 | { | |
561 | unsigned long ramdisk_image = boot_params.hdr.ramdisk_image; | |
562 | unsigned long ramdisk_size = boot_params.hdr.ramdisk_size; | |
563 | unsigned long ramdisk_end = ramdisk_image + ramdisk_size; | |
564 | unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
565 | unsigned long ramdisk_here; | |
566 | ||
567 | initrd_start = 0; | |
568 | ||
569 | if (!boot_params.hdr.type_of_loader || | |
570 | !ramdisk_image || !ramdisk_size) | |
571 | return; /* No initrd provided by bootloader */ | |
572 | ||
573 | if (ramdisk_end < ramdisk_image) { | |
574 | printk(KERN_ERR "initrd wraps around end of memory, " | |
575 | "disabling initrd\n"); | |
576 | return; | |
577 | } | |
578 | if (ramdisk_size >= end_of_lowmem/2) { | |
579 | printk(KERN_ERR "initrd too large to handle, " | |
580 | "disabling initrd\n"); | |
581 | return; | |
582 | } | |
583 | if (ramdisk_end <= end_of_lowmem) { | |
584 | /* All in lowmem, easy case */ | |
72a7fe39 | 585 | reserve_bootmem(ramdisk_image, ramdisk_size, BOOTMEM_DEFAULT); |
cf8fa920 PA |
586 | initrd_start = ramdisk_image + PAGE_OFFSET; |
587 | initrd_end = initrd_start+ramdisk_size; | |
588 | return; | |
589 | } | |
590 | ||
591 | /* We need to move the initrd down into lowmem */ | |
592 | ramdisk_here = (end_of_lowmem - ramdisk_size) & PAGE_MASK; | |
593 | ||
594 | /* Note: this includes all the lowmem currently occupied by | |
595 | the initrd, we rely on that fact to keep the data intact. */ | |
72a7fe39 | 596 | reserve_bootmem(ramdisk_here, ramdisk_size, BOOTMEM_DEFAULT); |
cf8fa920 PA |
597 | initrd_start = ramdisk_here + PAGE_OFFSET; |
598 | initrd_end = initrd_start + ramdisk_size; | |
599 | ||
600 | do_relocate_initrd = true; | |
601 | } | |
602 | ||
603 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) | |
604 | ||
605 | static void __init relocate_initrd(void) | |
606 | { | |
607 | unsigned long ramdisk_image = boot_params.hdr.ramdisk_image; | |
608 | unsigned long ramdisk_size = boot_params.hdr.ramdisk_size; | |
609 | unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
610 | unsigned long ramdisk_here; | |
611 | unsigned long slop, clen, mapaddr; | |
612 | char *p, *q; | |
613 | ||
614 | if (!do_relocate_initrd) | |
615 | return; | |
616 | ||
617 | ramdisk_here = initrd_start - PAGE_OFFSET; | |
618 | ||
619 | q = (char *)initrd_start; | |
620 | ||
621 | /* Copy any lowmem portion of the initrd */ | |
622 | if (ramdisk_image < end_of_lowmem) { | |
623 | clen = end_of_lowmem - ramdisk_image; | |
624 | p = (char *)__va(ramdisk_image); | |
625 | memcpy(q, p, clen); | |
626 | q += clen; | |
627 | ramdisk_image += clen; | |
628 | ramdisk_size -= clen; | |
629 | } | |
630 | ||
631 | /* Copy the highmem portion of the initrd */ | |
632 | while (ramdisk_size) { | |
633 | slop = ramdisk_image & ~PAGE_MASK; | |
634 | clen = ramdisk_size; | |
635 | if (clen > MAX_MAP_CHUNK-slop) | |
636 | clen = MAX_MAP_CHUNK-slop; | |
637 | mapaddr = ramdisk_image & PAGE_MASK; | |
beacfaac | 638 | p = early_ioremap(mapaddr, clen+slop); |
cf8fa920 | 639 | memcpy(q, p+slop, clen); |
beacfaac | 640 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
641 | q += clen; |
642 | ramdisk_image += clen; | |
643 | ramdisk_size -= clen; | |
644 | } | |
645 | } | |
646 | ||
647 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
648 | ||
1da177e4 LT |
649 | void __init setup_bootmem_allocator(void) |
650 | { | |
651 | unsigned long bootmap_size; | |
652 | /* | |
653 | * Initialize the boot-time allocator (with low memory only): | |
654 | */ | |
655 | bootmap_size = init_bootmem(min_low_pfn, max_low_pfn); | |
656 | ||
657 | register_bootmem_low_pages(max_low_pfn); | |
658 | ||
659 | /* | |
660 | * Reserve the bootmem bitmap itself as well. We do this in two | |
661 | * steps (first step was init_bootmem()) because this catches | |
662 | * the (very unlikely) case of us accidentally initializing the | |
663 | * bootmem allocator with an invalid RAM area. | |
664 | */ | |
8621b81c | 665 | reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) + |
72a7fe39 BW |
666 | bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text), |
667 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
668 | |
669 | /* | |
670 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
671 | * enabling clean reboots, SMP operation, laptop functions. | |
672 | */ | |
72a7fe39 | 673 | reserve_bootmem(0, PAGE_SIZE, BOOTMEM_DEFAULT); |
1da177e4 | 674 | |
dedd04be | 675 | /* reserve EBDA region */ |
1da177e4 LT |
676 | reserve_ebda_region(); |
677 | ||
1da177e4 LT |
678 | #ifdef CONFIG_SMP |
679 | /* | |
680 | * But first pinch a few for the stack/trampoline stuff | |
681 | * FIXME: Don't need the extra page at 4K, but need to fix | |
682 | * trampoline before removing it. (see the GDT stuff) | |
683 | */ | |
72a7fe39 | 684 | reserve_bootmem(PAGE_SIZE, PAGE_SIZE, BOOTMEM_DEFAULT); |
1da177e4 | 685 | #endif |
673d5b43 | 686 | #ifdef CONFIG_ACPI_SLEEP |
1da177e4 LT |
687 | /* |
688 | * Reserve low memory region for sleep support. | |
689 | */ | |
690 | acpi_reserve_bootmem(); | |
691 | #endif | |
692 | #ifdef CONFIG_X86_FIND_SMP_CONFIG | |
693 | /* | |
694 | * Find and reserve possible boot-time SMP configuration: | |
695 | */ | |
696 | find_smp_config(); | |
697 | #endif | |
1da177e4 | 698 | #ifdef CONFIG_BLK_DEV_INITRD |
cf8fa920 | 699 | reserve_initrd(); |
1da177e4 | 700 | #endif |
cf8fa920 | 701 | numa_kva_reserve(); |
d62cc471 | 702 | reserve_crashkernel(); |
138fe4e0 KR |
703 | |
704 | reserve_ibft_region(); | |
1da177e4 LT |
705 | } |
706 | ||
707 | /* | |
708 | * The node 0 pgdat is initialized before all of these because | |
709 | * it's needed for bootmem. node>0 pgdats have their virtual | |
710 | * space allocated before the pagetables are in place to access | |
711 | * them, so they can't be cleared then. | |
712 | * | |
713 | * This should all compile down to nothing when NUMA is off. | |
714 | */ | |
10079ae3 | 715 | static void __init remapped_pgdat_init(void) |
1da177e4 LT |
716 | { |
717 | int nid; | |
718 | ||
719 | for_each_online_node(nid) { | |
720 | if (nid != 0) | |
721 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
722 | } | |
723 | } | |
724 | ||
1da177e4 LT |
725 | #ifdef CONFIG_MCA |
726 | static void set_mca_bus(int x) | |
727 | { | |
728 | MCA_bus = x; | |
729 | } | |
730 | #else | |
731 | static void set_mca_bus(int x) { } | |
732 | #endif | |
733 | ||
d3561b7f | 734 | /* Overridden in paravirt.c if CONFIG_PARAVIRT */ |
88d20328 | 735 | char * __init __attribute__((weak)) memory_setup(void) |
d3561b7f RR |
736 | { |
737 | return machine_specific_memory_setup(); | |
738 | } | |
739 | ||
1da177e4 LT |
740 | /* |
741 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
742 | * passed the efi memmap, systab, etc., so we should use these data structures | |
743 | * for initialization. Note, the efi init code path is determined by the | |
744 | * global efi_enabled. This allows the same kernel image to be used on existing | |
745 | * systems (with a traditional BIOS) as well as on EFI systems. | |
746 | */ | |
747 | void __init setup_arch(char **cmdline_p) | |
748 | { | |
749 | unsigned long max_low_pfn; | |
750 | ||
751 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); | |
752 | pre_setup_arch_hook(); | |
753 | early_cpu_init(); | |
beacfaac | 754 | early_ioremap_init(); |
1da177e4 | 755 | |
1da177e4 | 756 | #ifdef CONFIG_EFI |
e429795c HY |
757 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, |
758 | "EL32", 4)) | |
1da177e4 LT |
759 | efi_enabled = 1; |
760 | #endif | |
761 | ||
30c82645 PA |
762 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
763 | screen_info = boot_params.screen_info; | |
764 | edid_info = boot_params.edid_info; | |
765 | apm_info.bios = boot_params.apm_bios_info; | |
766 | ist_info = boot_params.ist_info; | |
e44b7b75 | 767 | saved_video_mode = boot_params.hdr.vid_mode; |
30c82645 PA |
768 | if( boot_params.sys_desc_table.length != 0 ) { |
769 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); | |
770 | machine_id = boot_params.sys_desc_table.table[0]; | |
771 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
772 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 773 | } |
30c82645 | 774 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
775 | |
776 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
777 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
778 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
779 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 LT |
780 | #endif |
781 | ARCH_SETUP | |
2215e69d HY |
782 | |
783 | printk(KERN_INFO "BIOS-provided physical RAM map:\n"); | |
784 | print_memory_map(memory_setup()); | |
785 | ||
1da177e4 LT |
786 | copy_edd(); |
787 | ||
30c82645 | 788 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
789 | root_mountflags &= ~MS_RDONLY; |
790 | init_mm.start_code = (unsigned long) _text; | |
791 | init_mm.end_code = (unsigned long) _etext; | |
792 | init_mm.end_data = (unsigned long) _edata; | |
793 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; | |
794 | ||
795 | code_resource.start = virt_to_phys(_text); | |
796 | code_resource.end = virt_to_phys(_etext)-1; | |
797 | data_resource.start = virt_to_phys(_etext); | |
798 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
799 | bss_resource.start = virt_to_phys(&__bss_start); |
800 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 801 | |
1a3f239d | 802 | parse_early_param(); |
1da177e4 | 803 | |
1a3f239d RR |
804 | if (user_defined_memmap) { |
805 | printk(KERN_INFO "user-defined physical RAM map:\n"); | |
806 | print_memory_map("user"); | |
99b7de33 | 807 | } |
1a3f239d | 808 | |
4e498b66 | 809 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
1a3f239d | 810 | *cmdline_p = command_line; |
99b7de33 | 811 | |
8b2cb7a8 HY |
812 | if (efi_enabled) |
813 | efi_init(); | |
814 | ||
093af8d7 | 815 | /* update e820 for memory not covered by WB MTRRs */ |
fa5c4639 | 816 | propagate_e820_map(); |
093af8d7 YL |
817 | mtrr_bp_init(); |
818 | if (mtrr_trim_uncached_memory(max_pfn)) | |
fa5c4639 | 819 | propagate_e820_map(); |
76c32418 YL |
820 | |
821 | max_low_pfn = setup_memory(); | |
093af8d7 | 822 | |
790c73f6 GOC |
823 | #ifdef CONFIG_KVM_CLOCK |
824 | kvmclock_init(); | |
825 | #endif | |
826 | ||
7ce0bcfd ZA |
827 | #ifdef CONFIG_VMI |
828 | /* | |
829 | * Must be after max_low_pfn is determined, and before kernel | |
830 | * pagetables are setup. | |
831 | */ | |
832 | vmi_init(); | |
833 | #endif | |
0cf1bfd2 | 834 | kvm_guest_init(); |
7ce0bcfd | 835 | |
1da177e4 LT |
836 | /* |
837 | * NOTE: before this point _nobody_ is allowed to allocate | |
838 | * any memory using the bootmem allocator. Although the | |
27b46d76 | 839 | * allocator is now initialised only the first 8Mb of the kernel |
1da177e4 LT |
840 | * virtual address space has been mapped. All allocations before |
841 | * paging_init() has completed must use the alloc_bootmem_low_pages() | |
842 | * variant (which allocates DMA'able memory) and care must be taken | |
843 | * not to exceed the 8Mb limit. | |
844 | */ | |
845 | ||
846 | #ifdef CONFIG_SMP | |
847 | smp_alloc_memory(); /* AP processor realmode stacks in low memory*/ | |
848 | #endif | |
849 | paging_init(); | |
f212ec4b BK |
850 | |
851 | /* | |
852 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
853 | */ | |
854 | ||
855 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
856 | if (init_ohci1394_dma_early) | |
857 | init_ohci1394_dma_on_all_controllers(); | |
858 | #endif | |
859 | ||
1da177e4 | 860 | remapped_pgdat_init(); |
05b79bdc | 861 | sparse_init(); |
1da177e4 LT |
862 | zone_sizes_init(); |
863 | ||
864 | /* | |
865 | * NOTE: at this point the bootmem allocator is fully available. | |
866 | */ | |
867 | ||
cf8fa920 PA |
868 | #ifdef CONFIG_BLK_DEV_INITRD |
869 | relocate_initrd(); | |
870 | #endif | |
871 | ||
6996d3b6 JF |
872 | paravirt_post_allocator_init(); |
873 | ||
1da177e4 LT |
874 | dmi_scan_machine(); |
875 | ||
cf8fa920 | 876 | io_delay_init(); |
b02aae9c | 877 | |
1da177e4 | 878 | #ifdef CONFIG_X86_GENERICARCH |
1a3f239d | 879 | generic_apic_probe(); |
cf8fa920 | 880 | #endif |
1da177e4 | 881 | |
888ba6c6 | 882 | #ifdef CONFIG_ACPI |
1da177e4 LT |
883 | /* |
884 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
885 | */ | |
886 | acpi_boot_table_init(); | |
d44647b0 AC |
887 | #endif |
888 | ||
54ef3400 | 889 | early_quirks(); |
d44647b0 AC |
890 | |
891 | #ifdef CONFIG_ACPI | |
1da177e4 LT |
892 | acpi_boot_init(); |
893 | ||
911a62d4 VP |
894 | #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) |
895 | if (def_to_bigsmp) | |
896 | printk(KERN_WARNING "More than 8 CPUs detected and " | |
897 | "CONFIG_X86_PC cannot handle it.\nUse " | |
898 | "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); | |
899 | #endif | |
900 | #endif | |
1da177e4 LT |
901 | #ifdef CONFIG_X86_LOCAL_APIC |
902 | if (smp_found_config) | |
903 | get_smp_config(); | |
904 | #endif | |
905 | ||
5c95da9f | 906 | e820_register_memory(); |
1c10070a | 907 | e820_mark_nosave_regions(); |
1da177e4 LT |
908 | |
909 | #ifdef CONFIG_VT | |
910 | #if defined(CONFIG_VGA_CONSOLE) | |
911 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
912 | conswitchp = &vga_con; | |
913 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
914 | conswitchp = &dummy_con; | |
915 | #endif | |
916 | #endif | |
917 | } | |
c9cce83d BW |
918 | |
919 | /* | |
920 | * Request address space for all standard resources | |
921 | * | |
922 | * This is called just before pcibios_init(), which is also a | |
923 | * subsys_initcall, but is linked in later (in arch/i386/pci/common.c). | |
924 | */ | |
925 | static int __init request_standard_resources(void) | |
926 | { | |
927 | int i; | |
928 | ||
929 | printk(KERN_INFO "Setting up standard PCI resources\n"); | |
2215e69d | 930 | init_iomem_resources(&code_resource, &data_resource, &bss_resource); |
c9cce83d | 931 | |
c9cce83d BW |
932 | request_resource(&iomem_resource, &video_ram_resource); |
933 | ||
934 | /* request I/O space for devices used on all i[345]86 PCs */ | |
935 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
936 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
937 | return 0; | |
938 | } | |
939 | ||
940 | subsys_initcall(request_standard_resources); |