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-rw-r--r--arch/x86/kernel/setup_32.c964
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diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
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1/*
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>
26#include <linux/mmzone.h>
27#include <linux/screen_info.h>
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/iscsi_ibft.h>
43#include <linux/nodemask.h>
44#include <linux/kexec.h>
45#include <linux/crash_dump.h>
46#include <linux/dmi.h>
47#include <linux/pfn.h>
48#include <linux/pci.h>
49#include <linux/init_ohci1394_dma.h>
50#include <linux/kvm_para.h>
51
52#include <video/edid.h>
53
54#include <asm/mtrr.h>
55#include <asm/apic.h>
56#include <asm/e820.h>
57#include <asm/mpspec.h>
58#include <asm/mmzone.h>
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>
65#include <asm/vmi.h>
66#include <setup_arch.h>
67#include <asm/bios_ebda.h>
68#include <asm/cacheflush.h>
69#include <asm/processor.h>
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! */
74unsigned long init_pg_tables_end __initdata = ~0UL;
75
76/*
77 * Machine setup..
78 */
79static struct resource data_resource = {
80 .name = "Kernel data",
81 .start = 0,
82 .end = 0,
83 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
84};
85
86static struct resource code_resource = {
87 .name = "Kernel code",
88 .start = 0,
89 .end = 0,
90 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
91};
92
93static struct resource bss_resource = {
94 .name = "Kernel bss",
95 .start = 0,
96 .end = 0,
97 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
98};
99
100static struct resource video_ram_resource = {
101 .name = "Video RAM area",
102 .start = 0xa0000,
103 .end = 0xbffff,
104 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
105};
106
107static 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,
130 .end = 0x0060,
131 .flags = IORESOURCE_BUSY | IORESOURCE_IO
132}, {
133 .name = "keyboard",
134 .start = 0x0064,
135 .end = 0x0064,
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} };
158
159/* cpu data as detected by the assembly code in head.S */
160struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
161/* common cpu data for all cpus */
162struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
163EXPORT_SYMBOL(boot_cpu_data);
164
165unsigned int def_to_bigsmp;
166
167#ifndef CONFIG_X86_PAE
168unsigned long mmu_cr4_features;
169#else
170unsigned long mmu_cr4_features = X86_CR4_PAE;
171#endif
172
173/* for MCA, but anyone else can use it if they want */
174unsigned int machine_id;
175unsigned int machine_submodel_id;
176unsigned int BIOS_revision;
177
178/* Boot loader ID as an integer, for the benefit of proc_dointvec */
179int bootloader_type;
180
181/* user-defined highmem size */
182static unsigned int highmem_pages = -1;
183
184/*
185 * Setup options
186 */
187struct screen_info screen_info;
188EXPORT_SYMBOL(screen_info);
189struct apm_info apm_info;
190EXPORT_SYMBOL(apm_info);
191struct edid_info edid_info;
192EXPORT_SYMBOL_GPL(edid_info);
193struct ist_info ist_info;
194#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
195 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
196EXPORT_SYMBOL(ist_info);
197#endif
198
199extern void early_cpu_init(void);
200extern int root_mountflags;
201
202unsigned long saved_video_mode;
203
204#define RAMDISK_IMAGE_START_MASK 0x07FF
205#define RAMDISK_PROMPT_FLAG 0x8000
206#define RAMDISK_LOAD_FLAG 0x4000
207
208static char __initdata command_line[COMMAND_LINE_SIZE];
209
210#ifndef CONFIG_DEBUG_BOOT_PARAMS
211struct boot_params __initdata boot_params;
212#else
213struct boot_params boot_params;
214#endif
215
216#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
217struct edd edd;
218#ifdef CONFIG_EDD_MODULE
219EXPORT_SYMBOL(edd);
220#endif
221/**
222 * copy_edd() - Copy the BIOS EDD information
223 * from boot_params into a safe place.
224 *
225 */
226static inline void copy_edd(void)
227{
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;
233}
234#else
235static inline void copy_edd(void)
236{
237}
238#endif
239
240int __initdata user_defined_memmap;
241
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 */
252static int __init parse_mem(char *arg)
253{
254 if (!arg)
255 return -EINVAL;
256
257 if (strcmp(arg, "nopentium") == 0) {
258 setup_clear_cpu_cap(X86_FEATURE_PSE);
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.
265 */
266 unsigned long long mem_size;
267
268 mem_size = memparse(arg, &arg);
269 limit_regions(mem_size);
270 user_defined_memmap = 1;
271 }
272 return 0;
273}
274early_param("mem", parse_mem);
275
276#ifdef CONFIG_PROC_VMCORE
277/* elfcorehdr= specifies the location of elf core header
278 * stored by the crashed kernel.
279 */
280static int __init parse_elfcorehdr(char *arg)
281{
282 if (!arg)
283 return -EINVAL;
284
285 elfcorehdr_addr = memparse(arg, &arg);
286 return 0;
287}
288early_param("elfcorehdr", parse_elfcorehdr);
289#endif /* CONFIG_PROC_VMCORE */
290
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 */
296static int __init parse_highmem(char *arg)
297{
298 if (!arg)
299 return -EINVAL;
300
301 highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
302 return 0;
303}
304early_param("highmem", parse_highmem);
305
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 */
311static int __init parse_vmalloc(char *arg)
312{
313 if (!arg)
314 return -EINVAL;
315
316 __VMALLOC_RESERVE = memparse(arg, &arg);
317 return 0;
318}
319early_param("vmalloc", parse_vmalloc);
320
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 */
326static 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}
337early_param("reservetop", parse_reservetop);
338
339/*
340 * Determine low and high memory ranges:
341 */
342unsigned 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)
362 printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
363 else
364 printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
365 max_pfn = MAXMEM_PFN;
366#else /* !CONFIG_HIGHMEM */
367#ifndef CONFIG_HIGHMEM64G
368 if (max_pfn > MAX_NONPAE_PFN) {
369 max_pfn = MAX_NONPAE_PFN;
370 printk(KERN_WARNING "Warning only 4GB will be used.\n");
371 printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
372 }
373#endif /* !CONFIG_HIGHMEM64G */
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
398#define BIOS_LOWMEM_KILOBYTES 0x413
399
400/*
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.
409 */
410static void __init reserve_ebda_region(void)
411{
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. */
420 if (paravirt_enabled())
421 return;
422
423 /* end of low (conventional) memory */
424 lowmem = *(unsigned short *)__va(BIOS_LOWMEM_KILOBYTES);
425 lowmem <<= 10;
426
427 /* start of EBDA area */
428 ebda_addr = get_bios_ebda();
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);
446}
447
448#ifndef CONFIG_NEED_MULTIPLE_NODES
449static void __init setup_bootmem_allocator(void);
450static 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
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));
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;
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
484static void __init zone_sizes_init(void)
485{
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;
491#ifdef CONFIG_HIGHMEM
492 max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
493 add_active_range(0, 0, highend_pfn);
494#else
495 add_active_range(0, 0, max_low_pfn);
496#endif
497
498 free_area_init_nodes(max_zone_pfns);
499}
500#else
501extern unsigned long __init setup_memory(void);
502extern void zone_sizes_init(void);
503#endif /* !CONFIG_NEED_MULTIPLE_NODES */
504
505static 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
518static 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));
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
543 crashk_res.start = crash_base;
544 crashk_res.end = crash_base + crash_size - 1;
545 } else
546 printk(KERN_INFO "crashkernel reservation failed - "
547 "you have to specify a base address\n");
548 }
549}
550#else
551static inline void __init reserve_crashkernel(void)
552{}
553#endif
554
555#ifdef CONFIG_BLK_DEV_INITRD
556
557static bool do_relocate_initrd = false;
558
559static 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 */
585 reserve_bootmem(ramdisk_image, ramdisk_size, BOOTMEM_DEFAULT);
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. */
596 reserve_bootmem(ramdisk_here, ramdisk_size, BOOTMEM_DEFAULT);
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
605static 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;
638 p = early_ioremap(mapaddr, clen+slop);
639 memcpy(q, p+slop, clen);
640 early_iounmap(p, clen+slop);
641 q += clen;
642 ramdisk_image += clen;
643 ramdisk_size -= clen;
644 }
645}
646
647#endif /* CONFIG_BLK_DEV_INITRD */
648
649void __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 */
665 reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
666 bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text),
667 BOOTMEM_DEFAULT);
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 */
673 reserve_bootmem(0, PAGE_SIZE, BOOTMEM_DEFAULT);
674
675 /* reserve EBDA region */
676 reserve_ebda_region();
677
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 */
684 reserve_bootmem(PAGE_SIZE, PAGE_SIZE, BOOTMEM_DEFAULT);
685#endif
686#ifdef CONFIG_ACPI_SLEEP
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
698#ifdef CONFIG_BLK_DEV_INITRD
699 reserve_initrd();
700#endif
701 numa_kva_reserve();
702 reserve_crashkernel();
703
704 reserve_ibft_region();
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 */
715static void __init remapped_pgdat_init(void)
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
725#ifdef CONFIG_MCA
726static void set_mca_bus(int x)
727{
728 MCA_bus = x;
729}
730#else
731static void set_mca_bus(int x) { }
732#endif
733
734/* Overridden in paravirt.c if CONFIG_PARAVIRT */
735char * __init __attribute__((weak)) memory_setup(void)
736{
737 return machine_specific_memory_setup();
738}
739
740#ifdef CONFIG_NUMA
741/*
742 * In the golden day, when everything among i386 and x86_64 will be
743 * integrated, this will not live here
744 */
745void *x86_cpu_to_node_map_early_ptr;
746int x86_cpu_to_node_map_init[NR_CPUS] = {
747 [0 ... NR_CPUS-1] = NUMA_NO_NODE
748};
749DEFINE_PER_CPU(int, x86_cpu_to_node_map) = NUMA_NO_NODE;
750#endif
751
752/*
753 * Determine if we were loaded by an EFI loader. If so, then we have also been
754 * passed the efi memmap, systab, etc., so we should use these data structures
755 * for initialization. Note, the efi init code path is determined by the
756 * global efi_enabled. This allows the same kernel image to be used on existing
757 * systems (with a traditional BIOS) as well as on EFI systems.
758 */
759void __init setup_arch(char **cmdline_p)
760{
761 unsigned long max_low_pfn;
762
763 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
764 pre_setup_arch_hook();
765 early_cpu_init();
766 early_ioremap_init();
767
768#ifdef CONFIG_EFI
769 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
770 "EL32", 4))
771 efi_enabled = 1;
772#endif
773
774 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
775 screen_info = boot_params.screen_info;
776 edid_info = boot_params.edid_info;
777 apm_info.bios = boot_params.apm_bios_info;
778 ist_info = boot_params.ist_info;
779 saved_video_mode = boot_params.hdr.vid_mode;
780 if( boot_params.sys_desc_table.length != 0 ) {
781 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
782 machine_id = boot_params.sys_desc_table.table[0];
783 machine_submodel_id = boot_params.sys_desc_table.table[1];
784 BIOS_revision = boot_params.sys_desc_table.table[2];
785 }
786 bootloader_type = boot_params.hdr.type_of_loader;
787
788#ifdef CONFIG_BLK_DEV_RAM
789 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
790 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
791 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
792#endif
793 ARCH_SETUP
794
795 printk(KERN_INFO "BIOS-provided physical RAM map:\n");
796 print_memory_map(memory_setup());
797
798 copy_edd();
799
800 if (!boot_params.hdr.root_flags)
801 root_mountflags &= ~MS_RDONLY;
802 init_mm.start_code = (unsigned long) _text;
803 init_mm.end_code = (unsigned long) _etext;
804 init_mm.end_data = (unsigned long) _edata;
805 init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
806
807 code_resource.start = virt_to_phys(_text);
808 code_resource.end = virt_to_phys(_etext)-1;
809 data_resource.start = virt_to_phys(_etext);
810 data_resource.end = virt_to_phys(_edata)-1;
811 bss_resource.start = virt_to_phys(&__bss_start);
812 bss_resource.end = virt_to_phys(&__bss_stop)-1;
813
814 parse_early_param();
815
816 if (user_defined_memmap) {
817 printk(KERN_INFO "user-defined physical RAM map:\n");
818 print_memory_map("user");
819 }
820
821 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
822 *cmdline_p = command_line;
823
824 if (efi_enabled)
825 efi_init();
826
827 /* update e820 for memory not covered by WB MTRRs */
828 propagate_e820_map();
829 mtrr_bp_init();
830 if (mtrr_trim_uncached_memory(max_pfn))
831 propagate_e820_map();
832
833 max_low_pfn = setup_memory();
834
835#ifdef CONFIG_KVM_CLOCK
836 kvmclock_init();
837#endif
838
839#ifdef CONFIG_VMI
840 /*
841 * Must be after max_low_pfn is determined, and before kernel
842 * pagetables are setup.
843 */
844 vmi_init();
845#endif
846 kvm_guest_init();
847
848 /*
849 * NOTE: before this point _nobody_ is allowed to allocate
850 * any memory using the bootmem allocator. Although the
851 * allocator is now initialised only the first 8Mb of the kernel
852 * virtual address space has been mapped. All allocations before
853 * paging_init() has completed must use the alloc_bootmem_low_pages()
854 * variant (which allocates DMA'able memory) and care must be taken
855 * not to exceed the 8Mb limit.
856 */
857
858#ifdef CONFIG_SMP
859 smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
860#endif
861 paging_init();
862
863 /*
864 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
865 */
866
867#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
868 if (init_ohci1394_dma_early)
869 init_ohci1394_dma_on_all_controllers();
870#endif
871
872 remapped_pgdat_init();
873 sparse_init();
874 zone_sizes_init();
875
876 /*
877 * NOTE: at this point the bootmem allocator is fully available.
878 */
879
880#ifdef CONFIG_BLK_DEV_INITRD
881 relocate_initrd();
882#endif
883
884 paravirt_post_allocator_init();
885
886 dmi_scan_machine();
887
888 io_delay_init();
889
890#ifdef CONFIG_X86_SMP
891 /*
892 * setup to use the early static init tables during kernel startup
893 * X86_SMP will exclude sub-arches that don't deal well with it.
894 */
895 x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init;
896 x86_bios_cpu_apicid_early_ptr = (void *)x86_bios_cpu_apicid_init;
897#ifdef CONFIG_NUMA
898 x86_cpu_to_node_map_early_ptr = (void *)x86_cpu_to_node_map_init;
899#endif
900#endif
901
902#ifdef CONFIG_X86_GENERICARCH
903 generic_apic_probe();
904#endif
905
906#ifdef CONFIG_ACPI
907 /*
908 * Parse the ACPI tables for possible boot-time SMP configuration.
909 */
910 acpi_boot_table_init();
911#endif
912
913 early_quirks();
914
915#ifdef CONFIG_ACPI
916 acpi_boot_init();
917
918#if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
919 if (def_to_bigsmp)
920 printk(KERN_WARNING "More than 8 CPUs detected and "
921 "CONFIG_X86_PC cannot handle it.\nUse "
922 "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
923#endif
924#endif
925#ifdef CONFIG_X86_LOCAL_APIC
926 if (smp_found_config)
927 get_smp_config();
928#endif
929
930 e820_register_memory();
931 e820_mark_nosave_regions();
932
933#ifdef CONFIG_VT
934#if defined(CONFIG_VGA_CONSOLE)
935 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
936 conswitchp = &vga_con;
937#elif defined(CONFIG_DUMMY_CONSOLE)
938 conswitchp = &dummy_con;
939#endif
940#endif
941}
942
943/*
944 * Request address space for all standard resources
945 *
946 * This is called just before pcibios_init(), which is also a
947 * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
948 */
949static int __init request_standard_resources(void)
950{
951 int i;
952
953 printk(KERN_INFO "Setting up standard PCI resources\n");
954 init_iomem_resources(&code_resource, &data_resource, &bss_resource);
955
956 request_resource(&iomem_resource, &video_ram_resource);
957
958 /* request I/O space for devices used on all i[345]86 PCs */
959 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
960 request_resource(&ioport_resource, &standard_io_resources[i]);
961 return 0;
962}
963
964subsys_initcall(request_standard_resources);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-26 20:40:29 -0500