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> | |
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> |
1da177e4 | 65 | #include <bios_ebda.h> |
00bf4098 | 66 | #include <asm/cacheflush.h> |
1da177e4 LT |
67 | |
68 | /* This value is set up by the early boot code to point to the value | |
69 | immediately after the boot time page tables. It contains a *physical* | |
70 | address, and must not be in the .bss segment! */ | |
71 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
72 | ||
1da177e4 LT |
73 | /* |
74 | * Machine setup.. | |
75 | */ | |
c9cce83d BW |
76 | static struct resource data_resource = { |
77 | .name = "Kernel data", | |
78 | .start = 0, | |
79 | .end = 0, | |
80 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
81 | }; | |
82 | ||
83 | static struct resource code_resource = { | |
84 | .name = "Kernel code", | |
85 | .start = 0, | |
86 | .end = 0, | |
87 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
88 | }; | |
89 | ||
90 | static struct resource bss_resource = { | |
91 | .name = "Kernel bss", | |
92 | .start = 0, | |
93 | .end = 0, | |
94 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
95 | }; | |
96 | ||
97 | static struct resource video_ram_resource = { | |
98 | .name = "Video RAM area", | |
99 | .start = 0xa0000, | |
100 | .end = 0xbffff, | |
101 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
102 | }; | |
103 | ||
104 | static struct resource standard_io_resources[] = { { | |
105 | .name = "dma1", | |
106 | .start = 0x0000, | |
107 | .end = 0x001f, | |
108 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
109 | }, { | |
110 | .name = "pic1", | |
111 | .start = 0x0020, | |
112 | .end = 0x0021, | |
113 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
114 | }, { | |
115 | .name = "timer0", | |
116 | .start = 0x0040, | |
117 | .end = 0x0043, | |
118 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
119 | }, { | |
120 | .name = "timer1", | |
121 | .start = 0x0050, | |
122 | .end = 0x0053, | |
123 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
124 | }, { | |
125 | .name = "keyboard", | |
126 | .start = 0x0060, | |
127 | .end = 0x006f, | |
128 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
129 | }, { | |
130 | .name = "dma page reg", | |
131 | .start = 0x0080, | |
132 | .end = 0x008f, | |
133 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
134 | }, { | |
135 | .name = "pic2", | |
136 | .start = 0x00a0, | |
137 | .end = 0x00a1, | |
138 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
139 | }, { | |
140 | .name = "dma2", | |
141 | .start = 0x00c0, | |
142 | .end = 0x00df, | |
143 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
144 | }, { | |
145 | .name = "fpu", | |
146 | .start = 0x00f0, | |
147 | .end = 0x00ff, | |
148 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
149 | } }; | |
1da177e4 LT |
150 | |
151 | /* cpu data as detected by the assembly code in head.S */ | |
4a5d107a | 152 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
1da177e4 | 153 | /* common cpu data for all cpus */ |
c3d8c141 | 154 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
129f6946 | 155 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 LT |
156 | |
157 | unsigned long mmu_cr4_features; | |
158 | ||
1da177e4 LT |
159 | /* for MCA, but anyone else can use it if they want */ |
160 | unsigned int machine_id; | |
161 | unsigned int machine_submodel_id; | |
162 | unsigned int BIOS_revision; | |
163 | unsigned int mca_pentium_flag; | |
164 | ||
1da177e4 LT |
165 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
166 | int bootloader_type; | |
167 | ||
168 | /* user-defined highmem size */ | |
169 | static unsigned int highmem_pages = -1; | |
170 | ||
171 | /* | |
172 | * Setup options | |
173 | */ | |
1da177e4 | 174 | struct screen_info screen_info; |
129f6946 | 175 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 176 | struct apm_info apm_info; |
129f6946 | 177 | EXPORT_SYMBOL(apm_info); |
1da177e4 | 178 | struct edid_info edid_info; |
5e518d76 | 179 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 180 | struct ist_info ist_info; |
129f6946 AD |
181 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
182 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
183 | EXPORT_SYMBOL(ist_info); | |
184 | #endif | |
1da177e4 LT |
185 | |
186 | extern void early_cpu_init(void); | |
1da177e4 LT |
187 | extern int root_mountflags; |
188 | ||
189 | unsigned long saved_videomode; | |
190 | ||
cf8fa920 | 191 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 192 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 193 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 194 | |
4e498b66 | 195 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 | 196 | |
6d7d7433 | 197 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
48c7ae67 | 198 | struct boot_params __initdata boot_params; |
6d7d7433 HY |
199 | #else |
200 | struct boot_params boot_params; | |
201 | #endif | |
1da177e4 | 202 | |
1da177e4 LT |
203 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
204 | struct edd edd; | |
205 | #ifdef CONFIG_EDD_MODULE | |
206 | EXPORT_SYMBOL(edd); | |
207 | #endif | |
208 | /** | |
209 | * copy_edd() - Copy the BIOS EDD information | |
210 | * from boot_params into a safe place. | |
211 | * | |
212 | */ | |
213 | static inline void copy_edd(void) | |
214 | { | |
30c82645 PA |
215 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
216 | sizeof(edd.mbr_signature)); | |
217 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
218 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
219 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
220 | } |
221 | #else | |
222 | static inline void copy_edd(void) | |
223 | { | |
224 | } | |
225 | #endif | |
226 | ||
cef518e8 | 227 | int __initdata user_defined_memmap = 0; |
1da177e4 | 228 | |
1a3f239d RR |
229 | /* |
230 | * "mem=nopentium" disables the 4MB page tables. | |
231 | * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM | |
232 | * to <mem>, overriding the bios size. | |
233 | * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from | |
234 | * <start> to <start>+<mem>, overriding the bios size. | |
235 | * | |
236 | * HPA tells me bootloaders need to parse mem=, so no new | |
237 | * option should be mem= [also see Documentation/i386/boot.txt] | |
238 | */ | |
239 | static int __init parse_mem(char *arg) | |
240 | { | |
241 | if (!arg) | |
242 | return -EINVAL; | |
1da177e4 | 243 | |
1a3f239d | 244 | if (strcmp(arg, "nopentium") == 0) { |
13530257 | 245 | setup_clear_cpu_cap(X86_FEATURE_PSE); |
1a3f239d RR |
246 | } else { |
247 | /* If the user specifies memory size, we | |
248 | * limit the BIOS-provided memory map to | |
249 | * that size. exactmap can be used to specify | |
250 | * the exact map. mem=number can be used to | |
251 | * trim the existing memory map. | |
1da177e4 | 252 | */ |
1a3f239d | 253 | unsigned long long mem_size; |
cf8fa920 | 254 | |
1a3f239d RR |
255 | mem_size = memparse(arg, &arg); |
256 | limit_regions(mem_size); | |
257 | user_defined_memmap = 1; | |
258 | } | |
259 | return 0; | |
260 | } | |
261 | early_param("mem", parse_mem); | |
1da177e4 | 262 | |
1a3f239d RR |
263 | #ifdef CONFIG_PROC_VMCORE |
264 | /* elfcorehdr= specifies the location of elf core header | |
265 | * stored by the crashed kernel. | |
266 | */ | |
267 | static int __init parse_elfcorehdr(char *arg) | |
268 | { | |
269 | if (!arg) | |
270 | return -EINVAL; | |
66759a01 | 271 | |
1a3f239d RR |
272 | elfcorehdr_addr = memparse(arg, &arg); |
273 | return 0; | |
274 | } | |
275 | early_param("elfcorehdr", parse_elfcorehdr); | |
276 | #endif /* CONFIG_PROC_VMCORE */ | |
1da177e4 | 277 | |
1a3f239d RR |
278 | /* |
279 | * highmem=size forces highmem to be exactly 'size' bytes. | |
280 | * This works even on boxes that have no highmem otherwise. | |
281 | * This also works to reduce highmem size on bigger boxes. | |
282 | */ | |
283 | static int __init parse_highmem(char *arg) | |
284 | { | |
285 | if (!arg) | |
286 | return -EINVAL; | |
9635b47d | 287 | |
1a3f239d RR |
288 | highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT; |
289 | return 0; | |
290 | } | |
291 | early_param("highmem", parse_highmem); | |
9635b47d | 292 | |
1a3f239d RR |
293 | /* |
294 | * vmalloc=size forces the vmalloc area to be exactly 'size' | |
295 | * bytes. This can be used to increase (or decrease) the | |
296 | * vmalloc area - the default is 128m. | |
297 | */ | |
298 | static int __init parse_vmalloc(char *arg) | |
299 | { | |
300 | if (!arg) | |
301 | return -EINVAL; | |
1bc3b91a | 302 | |
1a3f239d RR |
303 | __VMALLOC_RESERVE = memparse(arg, &arg); |
304 | return 0; | |
1da177e4 | 305 | } |
1a3f239d | 306 | early_param("vmalloc", parse_vmalloc); |
1da177e4 | 307 | |
461a9aff ZA |
308 | /* |
309 | * reservetop=size reserves a hole at the top of the kernel address space which | |
310 | * a hypervisor can load into later. Needed for dynamically loaded hypervisors, | |
311 | * so relocating the fixmap can be done before paging initialization. | |
312 | */ | |
313 | static int __init parse_reservetop(char *arg) | |
314 | { | |
315 | unsigned long address; | |
316 | ||
317 | if (!arg) | |
318 | return -EINVAL; | |
319 | ||
320 | address = memparse(arg, &arg); | |
321 | reserve_top_address(address); | |
322 | return 0; | |
323 | } | |
324 | early_param("reservetop", parse_reservetop); | |
325 | ||
1da177e4 LT |
326 | /* |
327 | * Determine low and high memory ranges: | |
328 | */ | |
329 | unsigned long __init find_max_low_pfn(void) | |
330 | { | |
331 | unsigned long max_low_pfn; | |
332 | ||
333 | max_low_pfn = max_pfn; | |
334 | if (max_low_pfn > MAXMEM_PFN) { | |
335 | if (highmem_pages == -1) | |
336 | highmem_pages = max_pfn - MAXMEM_PFN; | |
337 | if (highmem_pages + MAXMEM_PFN < max_pfn) | |
338 | max_pfn = MAXMEM_PFN + highmem_pages; | |
339 | if (highmem_pages + MAXMEM_PFN > max_pfn) { | |
340 | printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages)); | |
341 | highmem_pages = 0; | |
342 | } | |
343 | max_low_pfn = MAXMEM_PFN; | |
344 | #ifndef CONFIG_HIGHMEM | |
345 | /* Maximum memory usable is what is directly addressable */ | |
346 | printk(KERN_WARNING "Warning only %ldMB will be used.\n", | |
347 | MAXMEM>>20); | |
348 | if (max_pfn > MAX_NONPAE_PFN) | |
c673f1a9 | 349 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 LT |
350 | else |
351 | printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); | |
352 | max_pfn = MAXMEM_PFN; | |
353 | #else /* !CONFIG_HIGHMEM */ | |
c673f1a9 | 354 | #ifndef CONFIG_HIGHMEM64G |
1da177e4 LT |
355 | if (max_pfn > MAX_NONPAE_PFN) { |
356 | max_pfn = MAX_NONPAE_PFN; | |
357 | printk(KERN_WARNING "Warning only 4GB will be used.\n"); | |
c673f1a9 | 358 | printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
1da177e4 | 359 | } |
c673f1a9 | 360 | #endif /* !CONFIG_HIGHMEM64G */ |
1da177e4 LT |
361 | #endif /* !CONFIG_HIGHMEM */ |
362 | } else { | |
363 | if (highmem_pages == -1) | |
364 | highmem_pages = 0; | |
365 | #ifdef CONFIG_HIGHMEM | |
366 | if (highmem_pages >= max_pfn) { | |
367 | printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn)); | |
368 | highmem_pages = 0; | |
369 | } | |
370 | if (highmem_pages) { | |
371 | if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){ | |
372 | printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages)); | |
373 | highmem_pages = 0; | |
374 | } | |
375 | max_low_pfn -= highmem_pages; | |
376 | } | |
377 | #else | |
378 | if (highmem_pages) | |
379 | printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n"); | |
380 | #endif | |
381 | } | |
382 | return max_low_pfn; | |
383 | } | |
384 | ||
1da177e4 LT |
385 | /* |
386 | * workaround for Dell systems that neglect to reserve EBDA | |
387 | */ | |
388 | static void __init reserve_ebda_region(void) | |
389 | { | |
390 | unsigned int addr; | |
391 | addr = get_bios_ebda(); | |
392 | if (addr) | |
72a7fe39 | 393 | reserve_bootmem(addr, PAGE_SIZE, BOOTMEM_DEFAULT); |
1da177e4 LT |
394 | } |
395 | ||
05b79bdc | 396 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
1da177e4 LT |
397 | void __init setup_bootmem_allocator(void); |
398 | static unsigned long __init setup_memory(void) | |
399 | { | |
400 | /* | |
401 | * partially used pages are not usable - thus | |
402 | * we are rounding upwards: | |
403 | */ | |
404 | min_low_pfn = PFN_UP(init_pg_tables_end); | |
405 | ||
406 | find_max_pfn(); | |
407 | ||
408 | max_low_pfn = find_max_low_pfn(); | |
409 | ||
410 | #ifdef CONFIG_HIGHMEM | |
411 | highstart_pfn = highend_pfn = max_pfn; | |
412 | if (max_pfn > max_low_pfn) { | |
413 | highstart_pfn = max_low_pfn; | |
414 | } | |
415 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", | |
416 | pages_to_mb(highend_pfn - highstart_pfn)); | |
ba9c231f JB |
417 | num_physpages = highend_pfn; |
418 | high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; | |
419 | #else | |
420 | num_physpages = max_low_pfn; | |
421 | high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; | |
422 | #endif | |
423 | #ifdef CONFIG_FLATMEM | |
424 | max_mapnr = num_physpages; | |
1da177e4 LT |
425 | #endif |
426 | printk(KERN_NOTICE "%ldMB LOWMEM available.\n", | |
427 | pages_to_mb(max_low_pfn)); | |
428 | ||
429 | setup_bootmem_allocator(); | |
430 | ||
431 | return max_low_pfn; | |
432 | } | |
433 | ||
434 | void __init zone_sizes_init(void) | |
435 | { | |
6391af17 MG |
436 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
437 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); | |
438 | max_zone_pfns[ZONE_DMA] = | |
439 | virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; | |
440 | max_zone_pfns[ZONE_NORMAL] = max_low_pfn; | |
1da177e4 | 441 | #ifdef CONFIG_HIGHMEM |
6391af17 | 442 | max_zone_pfns[ZONE_HIGHMEM] = highend_pfn; |
4cfee88a MG |
443 | add_active_range(0, 0, highend_pfn); |
444 | #else | |
4cfee88a | 445 | add_active_range(0, 0, max_low_pfn); |
1da177e4 | 446 | #endif |
4cfee88a MG |
447 | |
448 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
449 | } |
450 | #else | |
05b79bdc | 451 | extern unsigned long __init setup_memory(void); |
1da177e4 | 452 | extern void zone_sizes_init(void); |
05b79bdc | 453 | #endif /* !CONFIG_NEED_MULTIPLE_NODES */ |
1da177e4 | 454 | |
d62cc471 BW |
455 | static inline unsigned long long get_total_mem(void) |
456 | { | |
457 | unsigned long long total; | |
458 | ||
459 | total = max_low_pfn - min_low_pfn; | |
460 | #ifdef CONFIG_HIGHMEM | |
461 | total += highend_pfn - highstart_pfn; | |
462 | #endif | |
463 | ||
464 | return total << PAGE_SHIFT; | |
465 | } | |
466 | ||
467 | #ifdef CONFIG_KEXEC | |
468 | static void __init reserve_crashkernel(void) | |
469 | { | |
470 | unsigned long long total_mem; | |
471 | unsigned long long crash_size, crash_base; | |
472 | int ret; | |
473 | ||
474 | total_mem = get_total_mem(); | |
475 | ||
476 | ret = parse_crashkernel(boot_command_line, total_mem, | |
477 | &crash_size, &crash_base); | |
478 | if (ret == 0 && crash_size > 0) { | |
479 | if (crash_base > 0) { | |
480 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
481 | "for crashkernel (System RAM: %ldMB)\n", | |
482 | (unsigned long)(crash_size >> 20), | |
483 | (unsigned long)(crash_base >> 20), | |
484 | (unsigned long)(total_mem >> 20)); | |
485 | crashk_res.start = crash_base; | |
486 | crashk_res.end = crash_base + crash_size - 1; | |
72a7fe39 BW |
487 | reserve_bootmem(crash_base, crash_size, |
488 | BOOTMEM_DEFAULT); | |
d62cc471 BW |
489 | } else |
490 | printk(KERN_INFO "crashkernel reservation failed - " | |
491 | "you have to specify a base address\n"); | |
492 | } | |
493 | } | |
494 | #else | |
495 | static inline void __init reserve_crashkernel(void) | |
496 | {} | |
497 | #endif | |
498 | ||
cf8fa920 PA |
499 | #ifdef CONFIG_BLK_DEV_INITRD |
500 | ||
501 | static bool do_relocate_initrd = false; | |
502 | ||
503 | static void __init reserve_initrd(void) | |
504 | { | |
505 | unsigned long ramdisk_image = boot_params.hdr.ramdisk_image; | |
506 | unsigned long ramdisk_size = boot_params.hdr.ramdisk_size; | |
507 | unsigned long ramdisk_end = ramdisk_image + ramdisk_size; | |
508 | unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
509 | unsigned long ramdisk_here; | |
510 | ||
511 | initrd_start = 0; | |
512 | ||
513 | if (!boot_params.hdr.type_of_loader || | |
514 | !ramdisk_image || !ramdisk_size) | |
515 | return; /* No initrd provided by bootloader */ | |
516 | ||
517 | if (ramdisk_end < ramdisk_image) { | |
518 | printk(KERN_ERR "initrd wraps around end of memory, " | |
519 | "disabling initrd\n"); | |
520 | return; | |
521 | } | |
522 | if (ramdisk_size >= end_of_lowmem/2) { | |
523 | printk(KERN_ERR "initrd too large to handle, " | |
524 | "disabling initrd\n"); | |
525 | return; | |
526 | } | |
527 | if (ramdisk_end <= end_of_lowmem) { | |
528 | /* All in lowmem, easy case */ | |
72a7fe39 | 529 | reserve_bootmem(ramdisk_image, ramdisk_size, BOOTMEM_DEFAULT); |
cf8fa920 PA |
530 | initrd_start = ramdisk_image + PAGE_OFFSET; |
531 | initrd_end = initrd_start+ramdisk_size; | |
532 | return; | |
533 | } | |
534 | ||
535 | /* We need to move the initrd down into lowmem */ | |
536 | ramdisk_here = (end_of_lowmem - ramdisk_size) & PAGE_MASK; | |
537 | ||
538 | /* Note: this includes all the lowmem currently occupied by | |
539 | the initrd, we rely on that fact to keep the data intact. */ | |
72a7fe39 | 540 | reserve_bootmem(ramdisk_here, ramdisk_size, BOOTMEM_DEFAULT); |
cf8fa920 PA |
541 | initrd_start = ramdisk_here + PAGE_OFFSET; |
542 | initrd_end = initrd_start + ramdisk_size; | |
543 | ||
544 | do_relocate_initrd = true; | |
545 | } | |
546 | ||
547 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) | |
548 | ||
549 | static void __init relocate_initrd(void) | |
550 | { | |
551 | unsigned long ramdisk_image = boot_params.hdr.ramdisk_image; | |
552 | unsigned long ramdisk_size = boot_params.hdr.ramdisk_size; | |
553 | unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
554 | unsigned long ramdisk_here; | |
555 | unsigned long slop, clen, mapaddr; | |
556 | char *p, *q; | |
557 | ||
558 | if (!do_relocate_initrd) | |
559 | return; | |
560 | ||
561 | ramdisk_here = initrd_start - PAGE_OFFSET; | |
562 | ||
563 | q = (char *)initrd_start; | |
564 | ||
565 | /* Copy any lowmem portion of the initrd */ | |
566 | if (ramdisk_image < end_of_lowmem) { | |
567 | clen = end_of_lowmem - ramdisk_image; | |
568 | p = (char *)__va(ramdisk_image); | |
569 | memcpy(q, p, clen); | |
570 | q += clen; | |
571 | ramdisk_image += clen; | |
572 | ramdisk_size -= clen; | |
573 | } | |
574 | ||
575 | /* Copy the highmem portion of the initrd */ | |
576 | while (ramdisk_size) { | |
577 | slop = ramdisk_image & ~PAGE_MASK; | |
578 | clen = ramdisk_size; | |
579 | if (clen > MAX_MAP_CHUNK-slop) | |
580 | clen = MAX_MAP_CHUNK-slop; | |
581 | mapaddr = ramdisk_image & PAGE_MASK; | |
beacfaac | 582 | p = early_ioremap(mapaddr, clen+slop); |
cf8fa920 | 583 | memcpy(q, p+slop, clen); |
beacfaac | 584 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
585 | q += clen; |
586 | ramdisk_image += clen; | |
587 | ramdisk_size -= clen; | |
588 | } | |
589 | } | |
590 | ||
591 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
592 | ||
1da177e4 LT |
593 | void __init setup_bootmem_allocator(void) |
594 | { | |
595 | unsigned long bootmap_size; | |
596 | /* | |
597 | * Initialize the boot-time allocator (with low memory only): | |
598 | */ | |
599 | bootmap_size = init_bootmem(min_low_pfn, max_low_pfn); | |
600 | ||
601 | register_bootmem_low_pages(max_low_pfn); | |
602 | ||
603 | /* | |
604 | * Reserve the bootmem bitmap itself as well. We do this in two | |
605 | * steps (first step was init_bootmem()) because this catches | |
606 | * the (very unlikely) case of us accidentally initializing the | |
607 | * bootmem allocator with an invalid RAM area. | |
608 | */ | |
8621b81c | 609 | reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) + |
72a7fe39 BW |
610 | bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text), |
611 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
612 | |
613 | /* | |
614 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
615 | * enabling clean reboots, SMP operation, laptop functions. | |
616 | */ | |
72a7fe39 | 617 | reserve_bootmem(0, PAGE_SIZE, BOOTMEM_DEFAULT); |
1da177e4 LT |
618 | |
619 | /* reserve EBDA region, it's a 4K region */ | |
620 | reserve_ebda_region(); | |
621 | ||
622 | /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent | |
623 | PCI prefetch into it (errata #56). Usually the page is reserved anyways, | |
624 | unless you have no PS/2 mouse plugged in. */ | |
625 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && | |
626 | boot_cpu_data.x86 == 6) | |
72a7fe39 | 627 | reserve_bootmem(0xa0000 - 4096, 4096, BOOTMEM_DEFAULT); |
1da177e4 LT |
628 | |
629 | #ifdef CONFIG_SMP | |
630 | /* | |
631 | * But first pinch a few for the stack/trampoline stuff | |
632 | * FIXME: Don't need the extra page at 4K, but need to fix | |
633 | * trampoline before removing it. (see the GDT stuff) | |
634 | */ | |
72a7fe39 | 635 | reserve_bootmem(PAGE_SIZE, PAGE_SIZE, BOOTMEM_DEFAULT); |
1da177e4 | 636 | #endif |
673d5b43 | 637 | #ifdef CONFIG_ACPI_SLEEP |
1da177e4 LT |
638 | /* |
639 | * Reserve low memory region for sleep support. | |
640 | */ | |
641 | acpi_reserve_bootmem(); | |
642 | #endif | |
643 | #ifdef CONFIG_X86_FIND_SMP_CONFIG | |
644 | /* | |
645 | * Find and reserve possible boot-time SMP configuration: | |
646 | */ | |
647 | find_smp_config(); | |
648 | #endif | |
1da177e4 | 649 | #ifdef CONFIG_BLK_DEV_INITRD |
cf8fa920 | 650 | reserve_initrd(); |
1da177e4 | 651 | #endif |
cf8fa920 | 652 | numa_kva_reserve(); |
d62cc471 | 653 | reserve_crashkernel(); |
1da177e4 LT |
654 | } |
655 | ||
656 | /* | |
657 | * The node 0 pgdat is initialized before all of these because | |
658 | * it's needed for bootmem. node>0 pgdats have their virtual | |
659 | * space allocated before the pagetables are in place to access | |
660 | * them, so they can't be cleared then. | |
661 | * | |
662 | * This should all compile down to nothing when NUMA is off. | |
663 | */ | |
10079ae3 | 664 | static void __init remapped_pgdat_init(void) |
1da177e4 LT |
665 | { |
666 | int nid; | |
667 | ||
668 | for_each_online_node(nid) { | |
669 | if (nid != 0) | |
670 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
671 | } | |
672 | } | |
673 | ||
1da177e4 LT |
674 | #ifdef CONFIG_MCA |
675 | static void set_mca_bus(int x) | |
676 | { | |
677 | MCA_bus = x; | |
678 | } | |
679 | #else | |
680 | static void set_mca_bus(int x) { } | |
681 | #endif | |
682 | ||
d3561b7f | 683 | /* Overridden in paravirt.c if CONFIG_PARAVIRT */ |
88d20328 | 684 | char * __init __attribute__((weak)) memory_setup(void) |
d3561b7f RR |
685 | { |
686 | return machine_specific_memory_setup(); | |
687 | } | |
688 | ||
1da177e4 LT |
689 | /* |
690 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
691 | * passed the efi memmap, systab, etc., so we should use these data structures | |
692 | * for initialization. Note, the efi init code path is determined by the | |
693 | * global efi_enabled. This allows the same kernel image to be used on existing | |
694 | * systems (with a traditional BIOS) as well as on EFI systems. | |
695 | */ | |
696 | void __init setup_arch(char **cmdline_p) | |
697 | { | |
698 | unsigned long max_low_pfn; | |
699 | ||
700 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); | |
701 | pre_setup_arch_hook(); | |
702 | early_cpu_init(); | |
beacfaac | 703 | early_ioremap_init(); |
1da177e4 | 704 | |
1da177e4 | 705 | #ifdef CONFIG_EFI |
e429795c HY |
706 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, |
707 | "EL32", 4)) | |
1da177e4 LT |
708 | efi_enabled = 1; |
709 | #endif | |
710 | ||
30c82645 PA |
711 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
712 | screen_info = boot_params.screen_info; | |
713 | edid_info = boot_params.edid_info; | |
714 | apm_info.bios = boot_params.apm_bios_info; | |
715 | ist_info = boot_params.ist_info; | |
716 | saved_videomode = boot_params.hdr.vid_mode; | |
717 | if( boot_params.sys_desc_table.length != 0 ) { | |
718 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); | |
719 | machine_id = boot_params.sys_desc_table.table[0]; | |
720 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
721 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 722 | } |
30c82645 | 723 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
724 | |
725 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
726 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
727 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
728 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 LT |
729 | #endif |
730 | ARCH_SETUP | |
2215e69d HY |
731 | |
732 | printk(KERN_INFO "BIOS-provided physical RAM map:\n"); | |
733 | print_memory_map(memory_setup()); | |
734 | ||
1da177e4 LT |
735 | copy_edd(); |
736 | ||
30c82645 | 737 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
738 | root_mountflags &= ~MS_RDONLY; |
739 | init_mm.start_code = (unsigned long) _text; | |
740 | init_mm.end_code = (unsigned long) _etext; | |
741 | init_mm.end_data = (unsigned long) _edata; | |
742 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; | |
743 | ||
744 | code_resource.start = virt_to_phys(_text); | |
745 | code_resource.end = virt_to_phys(_etext)-1; | |
746 | data_resource.start = virt_to_phys(_etext); | |
747 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
748 | bss_resource.start = virt_to_phys(&__bss_start); |
749 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 750 | |
1a3f239d | 751 | parse_early_param(); |
1da177e4 | 752 | |
1a3f239d RR |
753 | if (user_defined_memmap) { |
754 | printk(KERN_INFO "user-defined physical RAM map:\n"); | |
755 | print_memory_map("user"); | |
99b7de33 | 756 | } |
1a3f239d | 757 | |
4e498b66 | 758 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
1a3f239d | 759 | *cmdline_p = command_line; |
99b7de33 | 760 | |
8b2cb7a8 HY |
761 | if (efi_enabled) |
762 | efi_init(); | |
763 | ||
1da177e4 LT |
764 | max_low_pfn = setup_memory(); |
765 | ||
093af8d7 YL |
766 | /* update e820 for memory not covered by WB MTRRs */ |
767 | mtrr_bp_init(); | |
768 | if (mtrr_trim_uncached_memory(max_pfn)) | |
769 | max_low_pfn = setup_memory(); | |
770 | ||
7ce0bcfd ZA |
771 | #ifdef CONFIG_VMI |
772 | /* | |
773 | * Must be after max_low_pfn is determined, and before kernel | |
774 | * pagetables are setup. | |
775 | */ | |
776 | vmi_init(); | |
777 | #endif | |
778 | ||
1da177e4 LT |
779 | /* |
780 | * NOTE: before this point _nobody_ is allowed to allocate | |
781 | * any memory using the bootmem allocator. Although the | |
27b46d76 | 782 | * allocator is now initialised only the first 8Mb of the kernel |
1da177e4 LT |
783 | * virtual address space has been mapped. All allocations before |
784 | * paging_init() has completed must use the alloc_bootmem_low_pages() | |
785 | * variant (which allocates DMA'able memory) and care must be taken | |
786 | * not to exceed the 8Mb limit. | |
787 | */ | |
788 | ||
789 | #ifdef CONFIG_SMP | |
790 | smp_alloc_memory(); /* AP processor realmode stacks in low memory*/ | |
791 | #endif | |
792 | paging_init(); | |
f212ec4b BK |
793 | |
794 | /* | |
795 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
796 | */ | |
797 | ||
798 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
799 | if (init_ohci1394_dma_early) | |
800 | init_ohci1394_dma_on_all_controllers(); | |
801 | #endif | |
802 | ||
1da177e4 | 803 | remapped_pgdat_init(); |
05b79bdc | 804 | sparse_init(); |
1da177e4 LT |
805 | zone_sizes_init(); |
806 | ||
807 | /* | |
808 | * NOTE: at this point the bootmem allocator is fully available. | |
809 | */ | |
810 | ||
cf8fa920 PA |
811 | #ifdef CONFIG_BLK_DEV_INITRD |
812 | relocate_initrd(); | |
813 | #endif | |
814 | ||
6996d3b6 JF |
815 | paravirt_post_allocator_init(); |
816 | ||
1da177e4 LT |
817 | dmi_scan_machine(); |
818 | ||
cf8fa920 | 819 | io_delay_init(); |
b02aae9c | 820 | |
1da177e4 | 821 | #ifdef CONFIG_X86_GENERICARCH |
1a3f239d | 822 | generic_apic_probe(); |
cf8fa920 | 823 | #endif |
1da177e4 | 824 | |
888ba6c6 | 825 | #ifdef CONFIG_ACPI |
1da177e4 LT |
826 | /* |
827 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
828 | */ | |
829 | acpi_boot_table_init(); | |
d44647b0 AC |
830 | #endif |
831 | ||
54ef3400 | 832 | early_quirks(); |
d44647b0 AC |
833 | |
834 | #ifdef CONFIG_ACPI | |
1da177e4 LT |
835 | acpi_boot_init(); |
836 | ||
911a62d4 VP |
837 | #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) |
838 | if (def_to_bigsmp) | |
839 | printk(KERN_WARNING "More than 8 CPUs detected and " | |
840 | "CONFIG_X86_PC cannot handle it.\nUse " | |
841 | "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); | |
842 | #endif | |
843 | #endif | |
1da177e4 LT |
844 | #ifdef CONFIG_X86_LOCAL_APIC |
845 | if (smp_found_config) | |
846 | get_smp_config(); | |
847 | #endif | |
848 | ||
5c95da9f | 849 | e820_register_memory(); |
1c10070a | 850 | e820_mark_nosave_regions(); |
1da177e4 LT |
851 | |
852 | #ifdef CONFIG_VT | |
853 | #if defined(CONFIG_VGA_CONSOLE) | |
854 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
855 | conswitchp = &vga_con; | |
856 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
857 | conswitchp = &dummy_con; | |
858 | #endif | |
859 | #endif | |
860 | } | |
c9cce83d BW |
861 | |
862 | /* | |
863 | * Request address space for all standard resources | |
864 | * | |
865 | * This is called just before pcibios_init(), which is also a | |
866 | * subsys_initcall, but is linked in later (in arch/i386/pci/common.c). | |
867 | */ | |
868 | static int __init request_standard_resources(void) | |
869 | { | |
870 | int i; | |
871 | ||
872 | printk(KERN_INFO "Setting up standard PCI resources\n"); | |
2215e69d | 873 | init_iomem_resources(&code_resource, &data_resource, &bss_resource); |
c9cce83d | 874 | |
c9cce83d BW |
875 | request_resource(&iomem_resource, &video_ram_resource); |
876 | ||
877 | /* request I/O space for devices used on all i[345]86 PCs */ | |
878 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
879 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
880 | return 0; | |
881 | } | |
882 | ||
883 | subsys_initcall(request_standard_resources); |