Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/i386/kernel/setup.c | |
3 | * | |
4 | * Copyright (C) 1995 Linus Torvalds | |
5 | * | |
6 | * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 | |
7 | * | |
8 | * Memory region support | |
9 | * David Parsons <orc@pell.chi.il.us>, July-August 1999 | |
10 | * | |
11 | * Added E820 sanitization routine (removes overlapping memory regions); | |
12 | * Brian Moyle <bmoyle@mvista.com>, February 2001 | |
13 | * | |
14 | * Moved CPU detection code to cpu/${cpu}.c | |
15 | * Patrick Mochel <mochel@osdl.org>, March 2002 | |
16 | * | |
17 | * Provisions for empty E820 memory regions (reported by certain BIOSes). | |
18 | * Alex Achenbach <xela@slit.de>, December 2002. | |
19 | * | |
20 | */ | |
21 | ||
22 | /* | |
23 | * This file handles the architecture-dependent parts of initialization | |
24 | */ | |
25 | ||
26 | #include <linux/sched.h> | |
27 | #include <linux/mm.h> | |
05b79bdc | 28 | #include <linux/mmzone.h> |
894673ee | 29 | #include <linux/screen_info.h> |
1da177e4 LT |
30 | #include <linux/ioport.h> |
31 | #include <linux/acpi.h> | |
32 | #include <linux/apm_bios.h> | |
33 | #include <linux/initrd.h> | |
34 | #include <linux/bootmem.h> | |
35 | #include <linux/seq_file.h> | |
e5c6c8e4 | 36 | #include <linux/platform_device.h> |
1da177e4 LT |
37 | #include <linux/console.h> |
38 | #include <linux/mca.h> | |
39 | #include <linux/root_dev.h> | |
40 | #include <linux/highmem.h> | |
41 | #include <linux/module.h> | |
42 | #include <linux/efi.h> | |
43 | #include <linux/init.h> | |
44 | #include <linux/edd.h> | |
45 | #include <linux/nodemask.h> | |
1bc3b91a | 46 | #include <linux/kexec.h> |
2030eae5 | 47 | #include <linux/crash_dump.h> |
e9928674 | 48 | #include <linux/dmi.h> |
22a9835c | 49 | #include <linux/pfn.h> |
1bc3b91a | 50 | |
1da177e4 | 51 | #include <video/edid.h> |
1bc3b91a | 52 | |
9635b47d | 53 | #include <asm/apic.h> |
1da177e4 LT |
54 | #include <asm/e820.h> |
55 | #include <asm/mpspec.h> | |
91023300 | 56 | #include <asm/mmzone.h> |
1da177e4 LT |
57 | #include <asm/setup.h> |
58 | #include <asm/arch_hooks.h> | |
59 | #include <asm/sections.h> | |
60 | #include <asm/io_apic.h> | |
61 | #include <asm/ist.h> | |
62 | #include <asm/io.h> | |
e75eac33 | 63 | #include <setup_arch.h> |
1da177e4 LT |
64 | #include <bios_ebda.h> |
65 | ||
92aa63a5 VG |
66 | /* Forward Declaration. */ |
67 | void __init find_max_pfn(void); | |
68 | ||
1da177e4 LT |
69 | /* This value is set up by the early boot code to point to the value |
70 | immediately after the boot time page tables. It contains a *physical* | |
71 | address, and must not be in the .bss segment! */ | |
72 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
73 | ||
0bb3184d | 74 | int disable_pse __devinitdata = 0; |
1da177e4 LT |
75 | |
76 | /* | |
77 | * Machine setup.. | |
78 | */ | |
79 | ||
80 | #ifdef CONFIG_EFI | |
81 | int efi_enabled = 0; | |
82 | EXPORT_SYMBOL(efi_enabled); | |
83 | #endif | |
84 | ||
85 | /* cpu data as detected by the assembly code in head.S */ | |
86 | struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; | |
87 | /* common cpu data for all cpus */ | |
c3d8c141 | 88 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; |
129f6946 | 89 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 LT |
90 | |
91 | unsigned long mmu_cr4_features; | |
92 | ||
1da177e4 LT |
93 | /* for MCA, but anyone else can use it if they want */ |
94 | unsigned int machine_id; | |
129f6946 AD |
95 | #ifdef CONFIG_MCA |
96 | EXPORT_SYMBOL(machine_id); | |
97 | #endif | |
1da177e4 LT |
98 | unsigned int machine_submodel_id; |
99 | unsigned int BIOS_revision; | |
100 | unsigned int mca_pentium_flag; | |
101 | ||
102 | /* For PCI or other memory-mapped resources */ | |
103 | unsigned long pci_mem_start = 0x10000000; | |
129f6946 AD |
104 | #ifdef CONFIG_PCI |
105 | EXPORT_SYMBOL(pci_mem_start); | |
106 | #endif | |
1da177e4 LT |
107 | |
108 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ | |
109 | int bootloader_type; | |
110 | ||
111 | /* user-defined highmem size */ | |
112 | static unsigned int highmem_pages = -1; | |
113 | ||
114 | /* | |
115 | * Setup options | |
116 | */ | |
117 | struct drive_info_struct { char dummy[32]; } drive_info; | |
129f6946 AD |
118 | #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || \ |
119 | defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE) | |
120 | EXPORT_SYMBOL(drive_info); | |
121 | #endif | |
1da177e4 | 122 | struct screen_info screen_info; |
129f6946 | 123 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 124 | struct apm_info apm_info; |
129f6946 | 125 | EXPORT_SYMBOL(apm_info); |
1da177e4 LT |
126 | struct sys_desc_table_struct { |
127 | unsigned short length; | |
128 | unsigned char table[0]; | |
129 | }; | |
130 | struct edid_info edid_info; | |
5e518d76 | 131 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 132 | struct ist_info ist_info; |
129f6946 AD |
133 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
134 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
135 | EXPORT_SYMBOL(ist_info); | |
136 | #endif | |
1da177e4 LT |
137 | struct e820map e820; |
138 | ||
139 | extern void early_cpu_init(void); | |
1da177e4 LT |
140 | extern int root_mountflags; |
141 | ||
142 | unsigned long saved_videomode; | |
143 | ||
144 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
145 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
146 | #define RAMDISK_LOAD_FLAG 0x4000 | |
147 | ||
148 | static char command_line[COMMAND_LINE_SIZE]; | |
149 | ||
150 | unsigned char __initdata boot_params[PARAM_SIZE]; | |
151 | ||
152 | static struct resource data_resource = { | |
153 | .name = "Kernel data", | |
154 | .start = 0, | |
155 | .end = 0, | |
156 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
157 | }; | |
158 | ||
159 | static struct resource code_resource = { | |
160 | .name = "Kernel code", | |
161 | .start = 0, | |
162 | .end = 0, | |
163 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
164 | }; | |
165 | ||
166 | static struct resource system_rom_resource = { | |
167 | .name = "System ROM", | |
168 | .start = 0xf0000, | |
169 | .end = 0xfffff, | |
170 | .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | |
171 | }; | |
172 | ||
173 | static struct resource extension_rom_resource = { | |
174 | .name = "Extension ROM", | |
175 | .start = 0xe0000, | |
176 | .end = 0xeffff, | |
177 | .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | |
178 | }; | |
179 | ||
180 | static struct resource adapter_rom_resources[] = { { | |
181 | .name = "Adapter ROM", | |
182 | .start = 0xc8000, | |
183 | .end = 0, | |
184 | .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | |
185 | }, { | |
186 | .name = "Adapter ROM", | |
187 | .start = 0, | |
188 | .end = 0, | |
189 | .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | |
190 | }, { | |
191 | .name = "Adapter ROM", | |
192 | .start = 0, | |
193 | .end = 0, | |
194 | .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | |
195 | }, { | |
196 | .name = "Adapter ROM", | |
197 | .start = 0, | |
198 | .end = 0, | |
199 | .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | |
200 | }, { | |
201 | .name = "Adapter ROM", | |
202 | .start = 0, | |
203 | .end = 0, | |
204 | .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | |
205 | }, { | |
206 | .name = "Adapter ROM", | |
207 | .start = 0, | |
208 | .end = 0, | |
209 | .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | |
210 | } }; | |
211 | ||
1da177e4 LT |
212 | static struct resource video_rom_resource = { |
213 | .name = "Video ROM", | |
214 | .start = 0xc0000, | |
215 | .end = 0xc7fff, | |
216 | .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | |
217 | }; | |
218 | ||
219 | static struct resource video_ram_resource = { | |
220 | .name = "Video RAM area", | |
221 | .start = 0xa0000, | |
222 | .end = 0xbffff, | |
223 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
224 | }; | |
225 | ||
226 | static struct resource standard_io_resources[] = { { | |
227 | .name = "dma1", | |
228 | .start = 0x0000, | |
229 | .end = 0x001f, | |
230 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
231 | }, { | |
232 | .name = "pic1", | |
233 | .start = 0x0020, | |
234 | .end = 0x0021, | |
235 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
236 | }, { | |
237 | .name = "timer0", | |
238 | .start = 0x0040, | |
239 | .end = 0x0043, | |
240 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
241 | }, { | |
242 | .name = "timer1", | |
243 | .start = 0x0050, | |
244 | .end = 0x0053, | |
245 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
246 | }, { | |
247 | .name = "keyboard", | |
248 | .start = 0x0060, | |
249 | .end = 0x006f, | |
250 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
251 | }, { | |
252 | .name = "dma page reg", | |
253 | .start = 0x0080, | |
254 | .end = 0x008f, | |
255 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
256 | }, { | |
257 | .name = "pic2", | |
258 | .start = 0x00a0, | |
259 | .end = 0x00a1, | |
260 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
261 | }, { | |
262 | .name = "dma2", | |
263 | .start = 0x00c0, | |
264 | .end = 0x00df, | |
265 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
266 | }, { | |
267 | .name = "fpu", | |
268 | .start = 0x00f0, | |
269 | .end = 0x00ff, | |
270 | .flags = IORESOURCE_BUSY | IORESOURCE_IO | |
271 | } }; | |
272 | ||
1da177e4 LT |
273 | #define romsignature(x) (*(unsigned short *)(x) == 0xaa55) |
274 | ||
275 | static int __init romchecksum(unsigned char *rom, unsigned long length) | |
276 | { | |
277 | unsigned char *p, sum = 0; | |
278 | ||
279 | for (p = rom; p < rom + length; p++) | |
280 | sum += *p; | |
281 | return sum == 0; | |
282 | } | |
283 | ||
284 | static void __init probe_roms(void) | |
285 | { | |
286 | unsigned long start, length, upper; | |
287 | unsigned char *rom; | |
288 | int i; | |
289 | ||
290 | /* video rom */ | |
291 | upper = adapter_rom_resources[0].start; | |
292 | for (start = video_rom_resource.start; start < upper; start += 2048) { | |
293 | rom = isa_bus_to_virt(start); | |
294 | if (!romsignature(rom)) | |
295 | continue; | |
296 | ||
297 | video_rom_resource.start = start; | |
298 | ||
299 | /* 0 < length <= 0x7f * 512, historically */ | |
300 | length = rom[2] * 512; | |
301 | ||
302 | /* if checksum okay, trust length byte */ | |
303 | if (length && romchecksum(rom, length)) | |
304 | video_rom_resource.end = start + length - 1; | |
305 | ||
306 | request_resource(&iomem_resource, &video_rom_resource); | |
307 | break; | |
308 | } | |
309 | ||
310 | start = (video_rom_resource.end + 1 + 2047) & ~2047UL; | |
311 | if (start < upper) | |
312 | start = upper; | |
313 | ||
314 | /* system rom */ | |
315 | request_resource(&iomem_resource, &system_rom_resource); | |
316 | upper = system_rom_resource.start; | |
317 | ||
318 | /* check for extension rom (ignore length byte!) */ | |
319 | rom = isa_bus_to_virt(extension_rom_resource.start); | |
320 | if (romsignature(rom)) { | |
321 | length = extension_rom_resource.end - extension_rom_resource.start + 1; | |
322 | if (romchecksum(rom, length)) { | |
323 | request_resource(&iomem_resource, &extension_rom_resource); | |
324 | upper = extension_rom_resource.start; | |
325 | } | |
326 | } | |
327 | ||
328 | /* check for adapter roms on 2k boundaries */ | |
b9629b82 | 329 | for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) { |
1da177e4 LT |
330 | rom = isa_bus_to_virt(start); |
331 | if (!romsignature(rom)) | |
332 | continue; | |
333 | ||
334 | /* 0 < length <= 0x7f * 512, historically */ | |
335 | length = rom[2] * 512; | |
336 | ||
337 | /* but accept any length that fits if checksum okay */ | |
338 | if (!length || start + length > upper || !romchecksum(rom, length)) | |
339 | continue; | |
340 | ||
341 | adapter_rom_resources[i].start = start; | |
342 | adapter_rom_resources[i].end = start + length - 1; | |
343 | request_resource(&iomem_resource, &adapter_rom_resources[i]); | |
344 | ||
345 | start = adapter_rom_resources[i++].end & ~2047UL; | |
346 | } | |
347 | } | |
348 | ||
349 | static void __init limit_regions(unsigned long long size) | |
350 | { | |
351 | unsigned long long current_addr = 0; | |
352 | int i; | |
353 | ||
354 | if (efi_enabled) { | |
7ae65fd3 MT |
355 | efi_memory_desc_t *md; |
356 | void *p; | |
357 | ||
358 | for (p = memmap.map, i = 0; p < memmap.map_end; | |
359 | p += memmap.desc_size, i++) { | |
360 | md = p; | |
361 | current_addr = md->phys_addr + (md->num_pages << 12); | |
362 | if (md->type == EFI_CONVENTIONAL_MEMORY) { | |
1da177e4 | 363 | if (current_addr >= size) { |
7ae65fd3 | 364 | md->num_pages -= |
1da177e4 LT |
365 | (((current_addr-size) + PAGE_SIZE-1) >> PAGE_SHIFT); |
366 | memmap.nr_map = i + 1; | |
367 | return; | |
368 | } | |
369 | } | |
370 | } | |
371 | } | |
372 | for (i = 0; i < e820.nr_map; i++) { | |
f014a556 DH |
373 | current_addr = e820.map[i].addr + e820.map[i].size; |
374 | if (current_addr < size) | |
375 | continue; | |
376 | ||
377 | if (e820.map[i].type != E820_RAM) | |
378 | continue; | |
379 | ||
380 | if (e820.map[i].addr >= size) { | |
381 | /* | |
382 | * This region starts past the end of the | |
383 | * requested size, skip it completely. | |
384 | */ | |
385 | e820.nr_map = i; | |
386 | } else { | |
387 | e820.nr_map = i + 1; | |
388 | e820.map[i].size -= current_addr - size; | |
1da177e4 | 389 | } |
f014a556 | 390 | return; |
1da177e4 LT |
391 | } |
392 | } | |
393 | ||
e75eac33 JF |
394 | void __init add_memory_region(unsigned long long start, |
395 | unsigned long long size, int type) | |
1da177e4 LT |
396 | { |
397 | int x; | |
398 | ||
399 | if (!efi_enabled) { | |
400 | x = e820.nr_map; | |
401 | ||
402 | if (x == E820MAX) { | |
403 | printk(KERN_ERR "Ooops! Too many entries in the memory map!\n"); | |
404 | return; | |
405 | } | |
406 | ||
407 | e820.map[x].addr = start; | |
408 | e820.map[x].size = size; | |
409 | e820.map[x].type = type; | |
410 | e820.nr_map++; | |
411 | } | |
412 | } /* add_memory_region */ | |
413 | ||
414 | #define E820_DEBUG 1 | |
415 | ||
416 | static void __init print_memory_map(char *who) | |
417 | { | |
418 | int i; | |
419 | ||
420 | for (i = 0; i < e820.nr_map; i++) { | |
421 | printk(" %s: %016Lx - %016Lx ", who, | |
422 | e820.map[i].addr, | |
423 | e820.map[i].addr + e820.map[i].size); | |
424 | switch (e820.map[i].type) { | |
425 | case E820_RAM: printk("(usable)\n"); | |
426 | break; | |
427 | case E820_RESERVED: | |
428 | printk("(reserved)\n"); | |
429 | break; | |
430 | case E820_ACPI: | |
431 | printk("(ACPI data)\n"); | |
432 | break; | |
433 | case E820_NVS: | |
434 | printk("(ACPI NVS)\n"); | |
435 | break; | |
436 | default: printk("type %lu\n", e820.map[i].type); | |
437 | break; | |
438 | } | |
439 | } | |
440 | } | |
441 | ||
442 | /* | |
443 | * Sanitize the BIOS e820 map. | |
444 | * | |
445 | * Some e820 responses include overlapping entries. The following | |
446 | * replaces the original e820 map with a new one, removing overlaps. | |
447 | * | |
448 | */ | |
449 | struct change_member { | |
450 | struct e820entry *pbios; /* pointer to original bios entry */ | |
451 | unsigned long long addr; /* address for this change point */ | |
452 | }; | |
453 | static struct change_member change_point_list[2*E820MAX] __initdata; | |
454 | static struct change_member *change_point[2*E820MAX] __initdata; | |
455 | static struct e820entry *overlap_list[E820MAX] __initdata; | |
456 | static struct e820entry new_bios[E820MAX] __initdata; | |
457 | ||
e75eac33 | 458 | int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map) |
1da177e4 LT |
459 | { |
460 | struct change_member *change_tmp; | |
461 | unsigned long current_type, last_type; | |
462 | unsigned long long last_addr; | |
463 | int chgidx, still_changing; | |
464 | int overlap_entries; | |
465 | int new_bios_entry; | |
466 | int old_nr, new_nr, chg_nr; | |
467 | int i; | |
468 | ||
469 | /* | |
470 | Visually we're performing the following (1,2,3,4 = memory types)... | |
471 | ||
472 | Sample memory map (w/overlaps): | |
473 | ____22__________________ | |
474 | ______________________4_ | |
475 | ____1111________________ | |
476 | _44_____________________ | |
477 | 11111111________________ | |
478 | ____________________33__ | |
479 | ___________44___________ | |
480 | __________33333_________ | |
481 | ______________22________ | |
482 | ___________________2222_ | |
483 | _________111111111______ | |
484 | _____________________11_ | |
485 | _________________4______ | |
486 | ||
487 | Sanitized equivalent (no overlap): | |
488 | 1_______________________ | |
489 | _44_____________________ | |
490 | ___1____________________ | |
491 | ____22__________________ | |
492 | ______11________________ | |
493 | _________1______________ | |
494 | __________3_____________ | |
495 | ___________44___________ | |
496 | _____________33_________ | |
497 | _______________2________ | |
498 | ________________1_______ | |
499 | _________________4______ | |
500 | ___________________2____ | |
501 | ____________________33__ | |
502 | ______________________4_ | |
503 | */ | |
504 | ||
505 | /* if there's only one memory region, don't bother */ | |
506 | if (*pnr_map < 2) | |
507 | return -1; | |
508 | ||
509 | old_nr = *pnr_map; | |
510 | ||
511 | /* bail out if we find any unreasonable addresses in bios map */ | |
512 | for (i=0; i<old_nr; i++) | |
513 | if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr) | |
514 | return -1; | |
515 | ||
516 | /* create pointers for initial change-point information (for sorting) */ | |
517 | for (i=0; i < 2*old_nr; i++) | |
518 | change_point[i] = &change_point_list[i]; | |
519 | ||
520 | /* record all known change-points (starting and ending addresses), | |
521 | omitting those that are for empty memory regions */ | |
522 | chgidx = 0; | |
523 | for (i=0; i < old_nr; i++) { | |
524 | if (biosmap[i].size != 0) { | |
525 | change_point[chgidx]->addr = biosmap[i].addr; | |
526 | change_point[chgidx++]->pbios = &biosmap[i]; | |
527 | change_point[chgidx]->addr = biosmap[i].addr + biosmap[i].size; | |
528 | change_point[chgidx++]->pbios = &biosmap[i]; | |
529 | } | |
530 | } | |
531 | chg_nr = chgidx; /* true number of change-points */ | |
532 | ||
533 | /* sort change-point list by memory addresses (low -> high) */ | |
534 | still_changing = 1; | |
535 | while (still_changing) { | |
536 | still_changing = 0; | |
537 | for (i=1; i < chg_nr; i++) { | |
538 | /* if <current_addr> > <last_addr>, swap */ | |
539 | /* or, if current=<start_addr> & last=<end_addr>, swap */ | |
540 | if ((change_point[i]->addr < change_point[i-1]->addr) || | |
541 | ((change_point[i]->addr == change_point[i-1]->addr) && | |
542 | (change_point[i]->addr == change_point[i]->pbios->addr) && | |
543 | (change_point[i-1]->addr != change_point[i-1]->pbios->addr)) | |
544 | ) | |
545 | { | |
546 | change_tmp = change_point[i]; | |
547 | change_point[i] = change_point[i-1]; | |
548 | change_point[i-1] = change_tmp; | |
549 | still_changing=1; | |
550 | } | |
551 | } | |
552 | } | |
553 | ||
554 | /* create a new bios memory map, removing overlaps */ | |
555 | overlap_entries=0; /* number of entries in the overlap table */ | |
556 | new_bios_entry=0; /* index for creating new bios map entries */ | |
557 | last_type = 0; /* start with undefined memory type */ | |
558 | last_addr = 0; /* start with 0 as last starting address */ | |
559 | /* loop through change-points, determining affect on the new bios map */ | |
560 | for (chgidx=0; chgidx < chg_nr; chgidx++) | |
561 | { | |
562 | /* keep track of all overlapping bios entries */ | |
563 | if (change_point[chgidx]->addr == change_point[chgidx]->pbios->addr) | |
564 | { | |
565 | /* add map entry to overlap list (> 1 entry implies an overlap) */ | |
566 | overlap_list[overlap_entries++]=change_point[chgidx]->pbios; | |
567 | } | |
568 | else | |
569 | { | |
570 | /* remove entry from list (order independent, so swap with last) */ | |
571 | for (i=0; i<overlap_entries; i++) | |
572 | { | |
573 | if (overlap_list[i] == change_point[chgidx]->pbios) | |
574 | overlap_list[i] = overlap_list[overlap_entries-1]; | |
575 | } | |
576 | overlap_entries--; | |
577 | } | |
578 | /* if there are overlapping entries, decide which "type" to use */ | |
579 | /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */ | |
580 | current_type = 0; | |
581 | for (i=0; i<overlap_entries; i++) | |
582 | if (overlap_list[i]->type > current_type) | |
583 | current_type = overlap_list[i]->type; | |
584 | /* continue building up new bios map based on this information */ | |
585 | if (current_type != last_type) { | |
586 | if (last_type != 0) { | |
587 | new_bios[new_bios_entry].size = | |
588 | change_point[chgidx]->addr - last_addr; | |
589 | /* move forward only if the new size was non-zero */ | |
590 | if (new_bios[new_bios_entry].size != 0) | |
591 | if (++new_bios_entry >= E820MAX) | |
592 | break; /* no more space left for new bios entries */ | |
593 | } | |
594 | if (current_type != 0) { | |
595 | new_bios[new_bios_entry].addr = change_point[chgidx]->addr; | |
596 | new_bios[new_bios_entry].type = current_type; | |
597 | last_addr=change_point[chgidx]->addr; | |
598 | } | |
599 | last_type = current_type; | |
600 | } | |
601 | } | |
602 | new_nr = new_bios_entry; /* retain count for new bios entries */ | |
603 | ||
604 | /* copy new bios mapping into original location */ | |
605 | memcpy(biosmap, new_bios, new_nr*sizeof(struct e820entry)); | |
606 | *pnr_map = new_nr; | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | /* | |
612 | * Copy the BIOS e820 map into a safe place. | |
613 | * | |
614 | * Sanity-check it while we're at it.. | |
615 | * | |
616 | * If we're lucky and live on a modern system, the setup code | |
617 | * will have given us a memory map that we can use to properly | |
618 | * set up memory. If we aren't, we'll fake a memory map. | |
619 | * | |
620 | * We check to see that the memory map contains at least 2 elements | |
621 | * before we'll use it, because the detection code in setup.S may | |
622 | * not be perfect and most every PC known to man has two memory | |
623 | * regions: one from 0 to 640k, and one from 1mb up. (The IBM | |
624 | * thinkpad 560x, for example, does not cooperate with the memory | |
625 | * detection code.) | |
626 | */ | |
e75eac33 | 627 | int __init copy_e820_map(struct e820entry * biosmap, int nr_map) |
1da177e4 LT |
628 | { |
629 | /* Only one memory region (or negative)? Ignore it */ | |
630 | if (nr_map < 2) | |
631 | return -1; | |
632 | ||
633 | do { | |
634 | unsigned long long start = biosmap->addr; | |
635 | unsigned long long size = biosmap->size; | |
636 | unsigned long long end = start + size; | |
637 | unsigned long type = biosmap->type; | |
638 | ||
639 | /* Overflow in 64 bits? Ignore the memory map. */ | |
640 | if (start > end) | |
641 | return -1; | |
642 | ||
643 | /* | |
644 | * Some BIOSes claim RAM in the 640k - 1M region. | |
645 | * Not right. Fix it up. | |
646 | */ | |
647 | if (type == E820_RAM) { | |
648 | if (start < 0x100000ULL && end > 0xA0000ULL) { | |
649 | if (start < 0xA0000ULL) | |
650 | add_memory_region(start, 0xA0000ULL-start, type); | |
651 | if (end <= 0x100000ULL) | |
652 | continue; | |
653 | start = 0x100000ULL; | |
654 | size = end - start; | |
655 | } | |
656 | } | |
657 | add_memory_region(start, size, type); | |
658 | } while (biosmap++,--nr_map); | |
659 | return 0; | |
660 | } | |
661 | ||
662 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) | |
663 | struct edd edd; | |
664 | #ifdef CONFIG_EDD_MODULE | |
665 | EXPORT_SYMBOL(edd); | |
666 | #endif | |
667 | /** | |
668 | * copy_edd() - Copy the BIOS EDD information | |
669 | * from boot_params into a safe place. | |
670 | * | |
671 | */ | |
672 | static inline void copy_edd(void) | |
673 | { | |
674 | memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature)); | |
675 | memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info)); | |
676 | edd.mbr_signature_nr = EDD_MBR_SIG_NR; | |
677 | edd.edd_info_nr = EDD_NR; | |
678 | } | |
679 | #else | |
680 | static inline void copy_edd(void) | |
681 | { | |
682 | } | |
683 | #endif | |
684 | ||
1a3f239d | 685 | static int __initdata user_defined_memmap = 0; |
1da177e4 | 686 | |
1a3f239d RR |
687 | /* |
688 | * "mem=nopentium" disables the 4MB page tables. | |
689 | * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM | |
690 | * to <mem>, overriding the bios size. | |
691 | * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from | |
692 | * <start> to <start>+<mem>, overriding the bios size. | |
693 | * | |
694 | * HPA tells me bootloaders need to parse mem=, so no new | |
695 | * option should be mem= [also see Documentation/i386/boot.txt] | |
696 | */ | |
697 | static int __init parse_mem(char *arg) | |
698 | { | |
699 | if (!arg) | |
700 | return -EINVAL; | |
1da177e4 | 701 | |
1a3f239d RR |
702 | if (strcmp(arg, "nopentium") == 0) { |
703 | clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability); | |
704 | disable_pse = 1; | |
705 | } else { | |
706 | /* If the user specifies memory size, we | |
707 | * limit the BIOS-provided memory map to | |
708 | * that size. exactmap can be used to specify | |
709 | * the exact map. mem=number can be used to | |
710 | * trim the existing memory map. | |
1da177e4 | 711 | */ |
1a3f239d | 712 | unsigned long long mem_size; |
1da177e4 | 713 | |
1a3f239d RR |
714 | mem_size = memparse(arg, &arg); |
715 | limit_regions(mem_size); | |
716 | user_defined_memmap = 1; | |
717 | } | |
718 | return 0; | |
719 | } | |
720 | early_param("mem", parse_mem); | |
1da177e4 | 721 | |
1a3f239d RR |
722 | static int __init parse_memmap(char *arg) |
723 | { | |
724 | if (!arg) | |
725 | return -EINVAL; | |
1da177e4 | 726 | |
1a3f239d RR |
727 | if (strcmp(arg, "exactmap") == 0) { |
728 | #ifdef CONFIG_CRASH_DUMP | |
729 | /* If we are doing a crash dump, we | |
730 | * still need to know the real mem | |
731 | * size before original memory map is | |
732 | * reset. | |
1da177e4 | 733 | */ |
1a3f239d RR |
734 | find_max_pfn(); |
735 | saved_max_pfn = max_pfn; | |
1da177e4 | 736 | #endif |
1a3f239d RR |
737 | e820.nr_map = 0; |
738 | user_defined_memmap = 1; | |
739 | } else { | |
740 | /* If the user specifies memory size, we | |
741 | * limit the BIOS-provided memory map to | |
742 | * that size. exactmap can be used to specify | |
743 | * the exact map. mem=number can be used to | |
744 | * trim the existing memory map. | |
745 | */ | |
746 | unsigned long long start_at, mem_size; | |
747 | ||
748 | mem_size = memparse(arg, &arg); | |
749 | if (*arg == '@') { | |
750 | start_at = memparse(arg+1, &arg); | |
751 | add_memory_region(start_at, mem_size, E820_RAM); | |
752 | } else if (*arg == '#') { | |
753 | start_at = memparse(arg+1, &arg); | |
754 | add_memory_region(start_at, mem_size, E820_ACPI); | |
755 | } else if (*arg == '$') { | |
756 | start_at = memparse(arg+1, &arg); | |
757 | add_memory_region(start_at, mem_size, E820_RESERVED); | |
758 | } else { | |
759 | limit_regions(mem_size); | |
760 | user_defined_memmap = 1; | |
1da177e4 | 761 | } |
1a3f239d RR |
762 | } |
763 | return 0; | |
764 | } | |
765 | early_param("memmap", parse_memmap); | |
1da177e4 | 766 | |
1a3f239d RR |
767 | #ifdef CONFIG_PROC_VMCORE |
768 | /* elfcorehdr= specifies the location of elf core header | |
769 | * stored by the crashed kernel. | |
770 | */ | |
771 | static int __init parse_elfcorehdr(char *arg) | |
772 | { | |
773 | if (!arg) | |
774 | return -EINVAL; | |
66759a01 | 775 | |
1a3f239d RR |
776 | elfcorehdr_addr = memparse(arg, &arg); |
777 | return 0; | |
778 | } | |
779 | early_param("elfcorehdr", parse_elfcorehdr); | |
780 | #endif /* CONFIG_PROC_VMCORE */ | |
1da177e4 | 781 | |
1a3f239d RR |
782 | /* |
783 | * highmem=size forces highmem to be exactly 'size' bytes. | |
784 | * This works even on boxes that have no highmem otherwise. | |
785 | * This also works to reduce highmem size on bigger boxes. | |
786 | */ | |
787 | static int __init parse_highmem(char *arg) | |
788 | { | |
789 | if (!arg) | |
790 | return -EINVAL; | |
9635b47d | 791 | |
1a3f239d RR |
792 | highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT; |
793 | return 0; | |
794 | } | |
795 | early_param("highmem", parse_highmem); | |
9635b47d | 796 | |
1a3f239d RR |
797 | /* |
798 | * vmalloc=size forces the vmalloc area to be exactly 'size' | |
799 | * bytes. This can be used to increase (or decrease) the | |
800 | * vmalloc area - the default is 128m. | |
801 | */ | |
802 | static int __init parse_vmalloc(char *arg) | |
803 | { | |
804 | if (!arg) | |
805 | return -EINVAL; | |
1bc3b91a | 806 | |
1a3f239d RR |
807 | __VMALLOC_RESERVE = memparse(arg, &arg); |
808 | return 0; | |
1da177e4 | 809 | } |
1a3f239d | 810 | early_param("vmalloc", parse_vmalloc); |
1da177e4 | 811 | |
461a9aff ZA |
812 | /* |
813 | * reservetop=size reserves a hole at the top of the kernel address space which | |
814 | * a hypervisor can load into later. Needed for dynamically loaded hypervisors, | |
815 | * so relocating the fixmap can be done before paging initialization. | |
816 | */ | |
817 | static int __init parse_reservetop(char *arg) | |
818 | { | |
819 | unsigned long address; | |
820 | ||
821 | if (!arg) | |
822 | return -EINVAL; | |
823 | ||
824 | address = memparse(arg, &arg); | |
825 | reserve_top_address(address); | |
826 | return 0; | |
827 | } | |
828 | early_param("reservetop", parse_reservetop); | |
829 | ||
1da177e4 LT |
830 | /* |
831 | * Callback for efi_memory_walk. | |
832 | */ | |
833 | static int __init | |
834 | efi_find_max_pfn(unsigned long start, unsigned long end, void *arg) | |
835 | { | |
836 | unsigned long *max_pfn = arg, pfn; | |
837 | ||
838 | if (start < end) { | |
839 | pfn = PFN_UP(end -1); | |
840 | if (pfn > *max_pfn) | |
841 | *max_pfn = pfn; | |
842 | } | |
843 | return 0; | |
844 | } | |
845 | ||
215c3409 AW |
846 | static int __init |
847 | efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg) | |
848 | { | |
ae74589c | 849 | memory_present(0, PFN_UP(start), PFN_DOWN(end)); |
215c3409 AW |
850 | return 0; |
851 | } | |
1da177e4 | 852 | |
79e453d4 LT |
853 | /* |
854 | * This function checks if the entire range <start,end> is mapped with type. | |
855 | * | |
856 | * Note: this function only works correct if the e820 table is sorted and | |
857 | * not-overlapping, which is the case | |
858 | */ | |
859 | int __init | |
860 | e820_all_mapped(unsigned long s, unsigned long e, unsigned type) | |
861 | { | |
862 | u64 start = s; | |
863 | u64 end = e; | |
864 | int i; | |
865 | for (i = 0; i < e820.nr_map; i++) { | |
866 | struct e820entry *ei = &e820.map[i]; | |
867 | if (type && ei->type != type) | |
868 | continue; | |
869 | /* is the region (part) in overlap with the current region ?*/ | |
870 | if (ei->addr >= end || ei->addr + ei->size <= start) | |
871 | continue; | |
872 | /* if the region is at the beginning of <start,end> we move | |
873 | * start to the end of the region since it's ok until there | |
874 | */ | |
875 | if (ei->addr <= start) | |
876 | start = ei->addr + ei->size; | |
877 | /* if start is now at or beyond end, we're done, full | |
878 | * coverage */ | |
879 | if (start >= end) | |
880 | return 1; /* we're done */ | |
881 | } | |
882 | return 0; | |
883 | } | |
884 | ||
1da177e4 LT |
885 | /* |
886 | * Find the highest page frame number we have available | |
887 | */ | |
888 | void __init find_max_pfn(void) | |
889 | { | |
890 | int i; | |
891 | ||
892 | max_pfn = 0; | |
893 | if (efi_enabled) { | |
894 | efi_memmap_walk(efi_find_max_pfn, &max_pfn); | |
215c3409 | 895 | efi_memmap_walk(efi_memory_present_wrapper, NULL); |
1da177e4 LT |
896 | return; |
897 | } | |
898 | ||
899 | for (i = 0; i < e820.nr_map; i++) { | |
900 | unsigned long start, end; | |
901 | /* RAM? */ | |
902 | if (e820.map[i].type != E820_RAM) | |
903 | continue; | |
904 | start = PFN_UP(e820.map[i].addr); | |
905 | end = PFN_DOWN(e820.map[i].addr + e820.map[i].size); | |
906 | if (start >= end) | |
907 | continue; | |
908 | if (end > max_pfn) | |
909 | max_pfn = end; | |
215c3409 | 910 | memory_present(0, start, end); |
1da177e4 LT |
911 | } |
912 | } | |
913 | ||
914 | /* | |
915 | * Determine low and high memory ranges: | |
916 | */ | |
917 | unsigned long __init find_max_low_pfn(void) | |
918 | { | |
919 | unsigned long max_low_pfn; | |
920 | ||
921 | max_low_pfn = max_pfn; | |
922 | if (max_low_pfn > MAXMEM_PFN) { | |
923 | if (highmem_pages == -1) | |
924 | highmem_pages = max_pfn - MAXMEM_PFN; | |
925 | if (highmem_pages + MAXMEM_PFN < max_pfn) | |
926 | max_pfn = MAXMEM_PFN + highmem_pages; | |
927 | if (highmem_pages + MAXMEM_PFN > max_pfn) { | |
928 | printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages)); | |
929 | highmem_pages = 0; | |
930 | } | |
931 | max_low_pfn = MAXMEM_PFN; | |
932 | #ifndef CONFIG_HIGHMEM | |
933 | /* Maximum memory usable is what is directly addressable */ | |
934 | printk(KERN_WARNING "Warning only %ldMB will be used.\n", | |
935 | MAXMEM>>20); | |
936 | if (max_pfn > MAX_NONPAE_PFN) | |
937 | printk(KERN_WARNING "Use a PAE enabled kernel.\n"); | |
938 | else | |
939 | printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); | |
940 | max_pfn = MAXMEM_PFN; | |
941 | #else /* !CONFIG_HIGHMEM */ | |
942 | #ifndef CONFIG_X86_PAE | |
943 | if (max_pfn > MAX_NONPAE_PFN) { | |
944 | max_pfn = MAX_NONPAE_PFN; | |
945 | printk(KERN_WARNING "Warning only 4GB will be used.\n"); | |
946 | printk(KERN_WARNING "Use a PAE enabled kernel.\n"); | |
947 | } | |
948 | #endif /* !CONFIG_X86_PAE */ | |
949 | #endif /* !CONFIG_HIGHMEM */ | |
950 | } else { | |
951 | if (highmem_pages == -1) | |
952 | highmem_pages = 0; | |
953 | #ifdef CONFIG_HIGHMEM | |
954 | if (highmem_pages >= max_pfn) { | |
955 | printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn)); | |
956 | highmem_pages = 0; | |
957 | } | |
958 | if (highmem_pages) { | |
959 | if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){ | |
960 | printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages)); | |
961 | highmem_pages = 0; | |
962 | } | |
963 | max_low_pfn -= highmem_pages; | |
964 | } | |
965 | #else | |
966 | if (highmem_pages) | |
967 | printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n"); | |
968 | #endif | |
969 | } | |
970 | return max_low_pfn; | |
971 | } | |
972 | ||
973 | /* | |
974 | * Free all available memory for boot time allocation. Used | |
975 | * as a callback function by efi_memory_walk() | |
976 | */ | |
977 | ||
978 | static int __init | |
979 | free_available_memory(unsigned long start, unsigned long end, void *arg) | |
980 | { | |
981 | /* check max_low_pfn */ | |
23dd842c | 982 | if (start >= (max_low_pfn << PAGE_SHIFT)) |
1da177e4 | 983 | return 0; |
23dd842c TM |
984 | if (end >= (max_low_pfn << PAGE_SHIFT)) |
985 | end = max_low_pfn << PAGE_SHIFT; | |
1da177e4 LT |
986 | if (start < end) |
987 | free_bootmem(start, end - start); | |
988 | ||
989 | return 0; | |
990 | } | |
991 | /* | |
992 | * Register fully available low RAM pages with the bootmem allocator. | |
993 | */ | |
994 | static void __init register_bootmem_low_pages(unsigned long max_low_pfn) | |
995 | { | |
996 | int i; | |
997 | ||
998 | if (efi_enabled) { | |
999 | efi_memmap_walk(free_available_memory, NULL); | |
1000 | return; | |
1001 | } | |
1002 | for (i = 0; i < e820.nr_map; i++) { | |
1003 | unsigned long curr_pfn, last_pfn, size; | |
1004 | /* | |
1005 | * Reserve usable low memory | |
1006 | */ | |
1007 | if (e820.map[i].type != E820_RAM) | |
1008 | continue; | |
1009 | /* | |
1010 | * We are rounding up the start address of usable memory: | |
1011 | */ | |
1012 | curr_pfn = PFN_UP(e820.map[i].addr); | |
1013 | if (curr_pfn >= max_low_pfn) | |
1014 | continue; | |
1015 | /* | |
1016 | * ... and at the end of the usable range downwards: | |
1017 | */ | |
1018 | last_pfn = PFN_DOWN(e820.map[i].addr + e820.map[i].size); | |
1019 | ||
1020 | if (last_pfn > max_low_pfn) | |
1021 | last_pfn = max_low_pfn; | |
1022 | ||
1023 | /* | |
1024 | * .. finally, did all the rounding and playing | |
1025 | * around just make the area go away? | |
1026 | */ | |
1027 | if (last_pfn <= curr_pfn) | |
1028 | continue; | |
1029 | ||
1030 | size = last_pfn - curr_pfn; | |
1031 | free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size)); | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * workaround for Dell systems that neglect to reserve EBDA | |
1037 | */ | |
1038 | static void __init reserve_ebda_region(void) | |
1039 | { | |
1040 | unsigned int addr; | |
1041 | addr = get_bios_ebda(); | |
1042 | if (addr) | |
1043 | reserve_bootmem(addr, PAGE_SIZE); | |
1044 | } | |
1045 | ||
05b79bdc | 1046 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
1da177e4 LT |
1047 | void __init setup_bootmem_allocator(void); |
1048 | static unsigned long __init setup_memory(void) | |
1049 | { | |
1050 | /* | |
1051 | * partially used pages are not usable - thus | |
1052 | * we are rounding upwards: | |
1053 | */ | |
1054 | min_low_pfn = PFN_UP(init_pg_tables_end); | |
1055 | ||
1056 | find_max_pfn(); | |
1057 | ||
1058 | max_low_pfn = find_max_low_pfn(); | |
1059 | ||
1060 | #ifdef CONFIG_HIGHMEM | |
1061 | highstart_pfn = highend_pfn = max_pfn; | |
1062 | if (max_pfn > max_low_pfn) { | |
1063 | highstart_pfn = max_low_pfn; | |
1064 | } | |
1065 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", | |
1066 | pages_to_mb(highend_pfn - highstart_pfn)); | |
ba9c231f JB |
1067 | num_physpages = highend_pfn; |
1068 | high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; | |
1069 | #else | |
1070 | num_physpages = max_low_pfn; | |
1071 | high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; | |
1072 | #endif | |
1073 | #ifdef CONFIG_FLATMEM | |
1074 | max_mapnr = num_physpages; | |
1da177e4 LT |
1075 | #endif |
1076 | printk(KERN_NOTICE "%ldMB LOWMEM available.\n", | |
1077 | pages_to_mb(max_low_pfn)); | |
1078 | ||
1079 | setup_bootmem_allocator(); | |
1080 | ||
1081 | return max_low_pfn; | |
1082 | } | |
1083 | ||
1084 | void __init zone_sizes_init(void) | |
1085 | { | |
6391af17 MG |
1086 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
1087 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); | |
1088 | max_zone_pfns[ZONE_DMA] = | |
1089 | virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; | |
1090 | max_zone_pfns[ZONE_NORMAL] = max_low_pfn; | |
1da177e4 | 1091 | #ifdef CONFIG_HIGHMEM |
6391af17 | 1092 | max_zone_pfns[ZONE_HIGHMEM] = highend_pfn; |
4cfee88a MG |
1093 | add_active_range(0, 0, highend_pfn); |
1094 | #else | |
4cfee88a | 1095 | add_active_range(0, 0, max_low_pfn); |
1da177e4 | 1096 | #endif |
4cfee88a MG |
1097 | |
1098 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
1099 | } |
1100 | #else | |
05b79bdc | 1101 | extern unsigned long __init setup_memory(void); |
1da177e4 | 1102 | extern void zone_sizes_init(void); |
05b79bdc | 1103 | #endif /* !CONFIG_NEED_MULTIPLE_NODES */ |
1da177e4 LT |
1104 | |
1105 | void __init setup_bootmem_allocator(void) | |
1106 | { | |
1107 | unsigned long bootmap_size; | |
1108 | /* | |
1109 | * Initialize the boot-time allocator (with low memory only): | |
1110 | */ | |
1111 | bootmap_size = init_bootmem(min_low_pfn, max_low_pfn); | |
1112 | ||
1113 | register_bootmem_low_pages(max_low_pfn); | |
1114 | ||
1115 | /* | |
1116 | * Reserve the bootmem bitmap itself as well. We do this in two | |
1117 | * steps (first step was init_bootmem()) because this catches | |
1118 | * the (very unlikely) case of us accidentally initializing the | |
1119 | * bootmem allocator with an invalid RAM area. | |
1120 | */ | |
8a919085 VG |
1121 | reserve_bootmem(__PHYSICAL_START, (PFN_PHYS(min_low_pfn) + |
1122 | bootmap_size + PAGE_SIZE-1) - (__PHYSICAL_START)); | |
1da177e4 LT |
1123 | |
1124 | /* | |
1125 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
1126 | * enabling clean reboots, SMP operation, laptop functions. | |
1127 | */ | |
1128 | reserve_bootmem(0, PAGE_SIZE); | |
1129 | ||
1130 | /* reserve EBDA region, it's a 4K region */ | |
1131 | reserve_ebda_region(); | |
1132 | ||
1133 | /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent | |
1134 | PCI prefetch into it (errata #56). Usually the page is reserved anyways, | |
1135 | unless you have no PS/2 mouse plugged in. */ | |
1136 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && | |
1137 | boot_cpu_data.x86 == 6) | |
1138 | reserve_bootmem(0xa0000 - 4096, 4096); | |
1139 | ||
1140 | #ifdef CONFIG_SMP | |
1141 | /* | |
1142 | * But first pinch a few for the stack/trampoline stuff | |
1143 | * FIXME: Don't need the extra page at 4K, but need to fix | |
1144 | * trampoline before removing it. (see the GDT stuff) | |
1145 | */ | |
1146 | reserve_bootmem(PAGE_SIZE, PAGE_SIZE); | |
1147 | #endif | |
1148 | #ifdef CONFIG_ACPI_SLEEP | |
1149 | /* | |
1150 | * Reserve low memory region for sleep support. | |
1151 | */ | |
1152 | acpi_reserve_bootmem(); | |
1153 | #endif | |
1154 | #ifdef CONFIG_X86_FIND_SMP_CONFIG | |
1155 | /* | |
1156 | * Find and reserve possible boot-time SMP configuration: | |
1157 | */ | |
1158 | find_smp_config(); | |
1159 | #endif | |
91023300 | 1160 | numa_kva_reserve(); |
1da177e4 LT |
1161 | #ifdef CONFIG_BLK_DEV_INITRD |
1162 | if (LOADER_TYPE && INITRD_START) { | |
1163 | if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) { | |
1164 | reserve_bootmem(INITRD_START, INITRD_SIZE); | |
1165 | initrd_start = | |
1166 | INITRD_START ? INITRD_START + PAGE_OFFSET : 0; | |
1167 | initrd_end = initrd_start+INITRD_SIZE; | |
1168 | } | |
1169 | else { | |
1170 | printk(KERN_ERR "initrd extends beyond end of memory " | |
1171 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
1172 | INITRD_START + INITRD_SIZE, | |
1173 | max_low_pfn << PAGE_SHIFT); | |
1174 | initrd_start = 0; | |
1175 | } | |
1176 | } | |
1177 | #endif | |
1bc3b91a EB |
1178 | #ifdef CONFIG_KEXEC |
1179 | if (crashk_res.start != crashk_res.end) | |
1180 | reserve_bootmem(crashk_res.start, | |
1181 | crashk_res.end - crashk_res.start + 1); | |
1182 | #endif | |
1da177e4 LT |
1183 | } |
1184 | ||
1185 | /* | |
1186 | * The node 0 pgdat is initialized before all of these because | |
1187 | * it's needed for bootmem. node>0 pgdats have their virtual | |
1188 | * space allocated before the pagetables are in place to access | |
1189 | * them, so they can't be cleared then. | |
1190 | * | |
1191 | * This should all compile down to nothing when NUMA is off. | |
1192 | */ | |
1193 | void __init remapped_pgdat_init(void) | |
1194 | { | |
1195 | int nid; | |
1196 | ||
1197 | for_each_online_node(nid) { | |
1198 | if (nid != 0) | |
1199 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
1200 | } | |
1201 | } | |
1202 | ||
1203 | /* | |
1204 | * Request address space for all standard RAM and ROM resources | |
1205 | * and also for regions reported as reserved by the e820. | |
1206 | */ | |
1207 | static void __init | |
1208 | legacy_init_iomem_resources(struct resource *code_resource, struct resource *data_resource) | |
1209 | { | |
1210 | int i; | |
1211 | ||
1212 | probe_roms(); | |
1213 | for (i = 0; i < e820.nr_map; i++) { | |
1214 | struct resource *res; | |
87937472 | 1215 | #ifndef CONFIG_RESOURCES_64BIT |
9be2f7c3 LT |
1216 | if (e820.map[i].addr + e820.map[i].size > 0x100000000ULL) |
1217 | continue; | |
87937472 | 1218 | #endif |
b408cbc7 | 1219 | res = kzalloc(sizeof(struct resource), GFP_ATOMIC); |
1da177e4 LT |
1220 | switch (e820.map[i].type) { |
1221 | case E820_RAM: res->name = "System RAM"; break; | |
1222 | case E820_ACPI: res->name = "ACPI Tables"; break; | |
1223 | case E820_NVS: res->name = "ACPI Non-volatile Storage"; break; | |
1224 | default: res->name = "reserved"; | |
1225 | } | |
1226 | res->start = e820.map[i].addr; | |
1227 | res->end = res->start + e820.map[i].size - 1; | |
1228 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
a7546075 CM |
1229 | if (request_resource(&iomem_resource, res)) { |
1230 | kfree(res); | |
1231 | continue; | |
1232 | } | |
1da177e4 LT |
1233 | if (e820.map[i].type == E820_RAM) { |
1234 | /* | |
1235 | * We don't know which RAM region contains kernel data, | |
1236 | * so we try it repeatedly and let the resource manager | |
1237 | * test it. | |
1238 | */ | |
1239 | request_resource(res, code_resource); | |
1240 | request_resource(res, data_resource); | |
1bc3b91a EB |
1241 | #ifdef CONFIG_KEXEC |
1242 | request_resource(res, &crashk_res); | |
1243 | #endif | |
1da177e4 LT |
1244 | } |
1245 | } | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * Request address space for all standard resources | |
b408cbc7 | 1250 | * |
66004a6c LT |
1251 | * This is called just before pcibios_init(), which is also a |
1252 | * subsys_initcall, but is linked in later (in arch/i386/pci/common.c). | |
1da177e4 | 1253 | */ |
b408cbc7 | 1254 | static int __init request_standard_resources(void) |
1da177e4 | 1255 | { |
b408cbc7 | 1256 | int i; |
1da177e4 | 1257 | |
b408cbc7 | 1258 | printk("Setting up standard PCI resources\n"); |
1da177e4 LT |
1259 | if (efi_enabled) |
1260 | efi_initialize_iomem_resources(&code_resource, &data_resource); | |
1261 | else | |
1262 | legacy_init_iomem_resources(&code_resource, &data_resource); | |
1263 | ||
1264 | /* EFI systems may still have VGA */ | |
1265 | request_resource(&iomem_resource, &video_ram_resource); | |
1266 | ||
1267 | /* request I/O space for devices used on all i[345]86 PCs */ | |
b9629b82 | 1268 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) |
1da177e4 | 1269 | request_resource(&ioport_resource, &standard_io_resources[i]); |
b408cbc7 LT |
1270 | return 0; |
1271 | } | |
1272 | ||
66004a6c | 1273 | subsys_initcall(request_standard_resources); |
b408cbc7 LT |
1274 | |
1275 | static void __init register_memory(void) | |
1276 | { | |
1277 | unsigned long gapstart, gapsize, round; | |
1278 | unsigned long long last; | |
1279 | int i; | |
1da177e4 LT |
1280 | |
1281 | /* | |
1282 | * Search for the bigest gap in the low 32 bits of the e820 | |
1283 | * memory space. | |
1284 | */ | |
1285 | last = 0x100000000ull; | |
1286 | gapstart = 0x10000000; | |
1287 | gapsize = 0x400000; | |
1288 | i = e820.nr_map; | |
1289 | while (--i >= 0) { | |
1290 | unsigned long long start = e820.map[i].addr; | |
1291 | unsigned long long end = start + e820.map[i].size; | |
1292 | ||
1293 | /* | |
1294 | * Since "last" is at most 4GB, we know we'll | |
1295 | * fit in 32 bits if this condition is true | |
1296 | */ | |
1297 | if (last > end) { | |
1298 | unsigned long gap = last - end; | |
1299 | ||
1300 | if (gap > gapsize) { | |
1301 | gapsize = gap; | |
1302 | gapstart = end; | |
1303 | } | |
1304 | } | |
1305 | if (start < last) | |
1306 | last = start; | |
1307 | } | |
1308 | ||
1309 | /* | |
f0eca962 DR |
1310 | * See how much we want to round up: start off with |
1311 | * rounding to the next 1MB area. | |
1da177e4 | 1312 | */ |
f0eca962 DR |
1313 | round = 0x100000; |
1314 | while ((gapsize >> 4) > round) | |
1315 | round += round; | |
1316 | /* Fun with two's complement */ | |
1317 | pci_mem_start = (gapstart + round) & -round; | |
1da177e4 LT |
1318 | |
1319 | printk("Allocating PCI resources starting at %08lx (gap: %08lx:%08lx)\n", | |
1320 | pci_mem_start, gapstart, gapsize); | |
1321 | } | |
1322 | ||
1da177e4 LT |
1323 | #ifdef CONFIG_MCA |
1324 | static void set_mca_bus(int x) | |
1325 | { | |
1326 | MCA_bus = x; | |
1327 | } | |
1328 | #else | |
1329 | static void set_mca_bus(int x) { } | |
1330 | #endif | |
1331 | ||
1332 | /* | |
1333 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
1334 | * passed the efi memmap, systab, etc., so we should use these data structures | |
1335 | * for initialization. Note, the efi init code path is determined by the | |
1336 | * global efi_enabled. This allows the same kernel image to be used on existing | |
1337 | * systems (with a traditional BIOS) as well as on EFI systems. | |
1338 | */ | |
1339 | void __init setup_arch(char **cmdline_p) | |
1340 | { | |
1341 | unsigned long max_low_pfn; | |
1342 | ||
1343 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); | |
1344 | pre_setup_arch_hook(); | |
1345 | early_cpu_init(); | |
1346 | ||
1347 | /* | |
1348 | * FIXME: This isn't an official loader_type right | |
1349 | * now but does currently work with elilo. | |
1350 | * If we were configured as an EFI kernel, check to make | |
1351 | * sure that we were loaded correctly from elilo and that | |
1352 | * the system table is valid. If not, then initialize normally. | |
1353 | */ | |
1354 | #ifdef CONFIG_EFI | |
1355 | if ((LOADER_TYPE == 0x50) && EFI_SYSTAB) | |
1356 | efi_enabled = 1; | |
1357 | #endif | |
1358 | ||
1359 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); | |
1360 | drive_info = DRIVE_INFO; | |
1361 | screen_info = SCREEN_INFO; | |
1362 | edid_info = EDID_INFO; | |
1363 | apm_info.bios = APM_BIOS_INFO; | |
1364 | ist_info = IST_INFO; | |
1365 | saved_videomode = VIDEO_MODE; | |
1366 | if( SYS_DESC_TABLE.length != 0 ) { | |
1367 | set_mca_bus(SYS_DESC_TABLE.table[3] & 0x2); | |
1368 | machine_id = SYS_DESC_TABLE.table[0]; | |
1369 | machine_submodel_id = SYS_DESC_TABLE.table[1]; | |
1370 | BIOS_revision = SYS_DESC_TABLE.table[2]; | |
1371 | } | |
1372 | bootloader_type = LOADER_TYPE; | |
1373 | ||
1374 | #ifdef CONFIG_BLK_DEV_RAM | |
1375 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; | |
1376 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); | |
1377 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); | |
1378 | #endif | |
1379 | ARCH_SETUP | |
1380 | if (efi_enabled) | |
1381 | efi_init(); | |
1382 | else { | |
1383 | printk(KERN_INFO "BIOS-provided physical RAM map:\n"); | |
1384 | print_memory_map(machine_specific_memory_setup()); | |
1385 | } | |
1386 | ||
1387 | copy_edd(); | |
1388 | ||
1389 | if (!MOUNT_ROOT_RDONLY) | |
1390 | root_mountflags &= ~MS_RDONLY; | |
1391 | init_mm.start_code = (unsigned long) _text; | |
1392 | init_mm.end_code = (unsigned long) _etext; | |
1393 | init_mm.end_data = (unsigned long) _edata; | |
1394 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; | |
1395 | ||
1396 | code_resource.start = virt_to_phys(_text); | |
1397 | code_resource.end = virt_to_phys(_etext)-1; | |
1398 | data_resource.start = virt_to_phys(_etext); | |
1399 | data_resource.end = virt_to_phys(_edata)-1; | |
1400 | ||
1a3f239d | 1401 | parse_early_param(); |
1da177e4 | 1402 | |
1a3f239d RR |
1403 | if (user_defined_memmap) { |
1404 | printk(KERN_INFO "user-defined physical RAM map:\n"); | |
1405 | print_memory_map("user"); | |
99b7de33 | 1406 | } |
1a3f239d RR |
1407 | |
1408 | strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE); | |
1409 | *cmdline_p = command_line; | |
99b7de33 | 1410 | |
1da177e4 LT |
1411 | max_low_pfn = setup_memory(); |
1412 | ||
1413 | /* | |
1414 | * NOTE: before this point _nobody_ is allowed to allocate | |
1415 | * any memory using the bootmem allocator. Although the | |
1416 | * alloctor is now initialised only the first 8Mb of the kernel | |
1417 | * virtual address space has been mapped. All allocations before | |
1418 | * paging_init() has completed must use the alloc_bootmem_low_pages() | |
1419 | * variant (which allocates DMA'able memory) and care must be taken | |
1420 | * not to exceed the 8Mb limit. | |
1421 | */ | |
1422 | ||
1423 | #ifdef CONFIG_SMP | |
1424 | smp_alloc_memory(); /* AP processor realmode stacks in low memory*/ | |
1425 | #endif | |
1426 | paging_init(); | |
1427 | remapped_pgdat_init(); | |
05b79bdc | 1428 | sparse_init(); |
1da177e4 LT |
1429 | zone_sizes_init(); |
1430 | ||
1431 | /* | |
1432 | * NOTE: at this point the bootmem allocator is fully available. | |
1433 | */ | |
1434 | ||
1da177e4 LT |
1435 | dmi_scan_machine(); |
1436 | ||
1437 | #ifdef CONFIG_X86_GENERICARCH | |
1a3f239d | 1438 | generic_apic_probe(); |
1da177e4 LT |
1439 | #endif |
1440 | if (efi_enabled) | |
1441 | efi_map_memmap(); | |
1442 | ||
888ba6c6 | 1443 | #ifdef CONFIG_ACPI |
1da177e4 LT |
1444 | /* |
1445 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
1446 | */ | |
1447 | acpi_boot_table_init(); | |
d44647b0 AC |
1448 | #endif |
1449 | ||
f157cbb1 | 1450 | #ifdef CONFIG_PCI |
d44647b0 AC |
1451 | #ifdef CONFIG_X86_IO_APIC |
1452 | check_acpi_pci(); /* Checks more than just ACPI actually */ | |
1453 | #endif | |
f157cbb1 | 1454 | #endif |
d44647b0 AC |
1455 | |
1456 | #ifdef CONFIG_ACPI | |
1da177e4 LT |
1457 | acpi_boot_init(); |
1458 | ||
911a62d4 VP |
1459 | #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) |
1460 | if (def_to_bigsmp) | |
1461 | printk(KERN_WARNING "More than 8 CPUs detected and " | |
1462 | "CONFIG_X86_PC cannot handle it.\nUse " | |
1463 | "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); | |
1464 | #endif | |
1465 | #endif | |
1da177e4 LT |
1466 | #ifdef CONFIG_X86_LOCAL_APIC |
1467 | if (smp_found_config) | |
1468 | get_smp_config(); | |
1469 | #endif | |
1470 | ||
1471 | register_memory(); | |
1472 | ||
1473 | #ifdef CONFIG_VT | |
1474 | #if defined(CONFIG_VGA_CONSOLE) | |
1475 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
1476 | conswitchp = &vga_con; | |
1477 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
1478 | conswitchp = &dummy_con; | |
1479 | #endif | |
1480 | #endif | |
539eb11e | 1481 | tsc_init(); |
1da177e4 LT |
1482 | } |
1483 | ||
e5c6c8e4 MN |
1484 | static __init int add_pcspkr(void) |
1485 | { | |
1486 | struct platform_device *pd; | |
1487 | int ret; | |
1488 | ||
1489 | pd = platform_device_alloc("pcspkr", -1); | |
1490 | if (!pd) | |
1491 | return -ENOMEM; | |
1492 | ||
1493 | ret = platform_device_add(pd); | |
1494 | if (ret) | |
1495 | platform_device_put(pd); | |
1496 | ||
1497 | return ret; | |
1498 | } | |
1499 | device_initcall(add_pcspkr); | |
1500 | ||
1da177e4 LT |
1501 | /* |
1502 | * Local Variables: | |
1503 | * mode:c | |
1504 | * c-file-style:"k&r" | |
1505 | * c-basic-offset:8 | |
1506 | * End: | |
1507 | */ |