2 * linux/arch/i386/kernel/setup.c
4 * Copyright (C) 1995 Linus Torvalds
6 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
8 * Memory region support
9 * David Parsons <orc@pell.chi.il.us>, July-August 1999
11 * Added E820 sanitization routine (removes overlapping memory regions);
12 * Brian Moyle <bmoyle@mvista.com>, February 2001
14 * Moved CPU detection code to cpu/${cpu}.c
15 * Patrick Mochel <mochel@osdl.org>, March 2002
17 * Provisions for empty E820 memory regions (reported by certain BIOSes).
18 * Alex Achenbach <xela@slit.de>, December 2002.
23 * This file handles the architecture-dependent parts of initialization
26 #include <linux/sched.h>
28 #include <linux/mmzone.h>
29 #include <linux/screen_info.h>
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>
36 #include <linux/platform_device.h>
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>
46 #include <linux/kernel.h>
47 #include <linux/percpu.h>
48 #include <linux/notifier.h>
49 #include <linux/kexec.h>
50 #include <linux/crash_dump.h>
51 #include <linux/dmi.h>
52 #include <linux/pfn.h>
54 #include <video/edid.h>
58 #include <asm/mpspec.h>
59 #include <asm/setup.h>
60 #include <asm/arch_hooks.h>
61 #include <asm/sections.h>
62 #include <asm/io_apic.h>
65 #include <asm/hypervisor.h>
66 #include <xen/interface/physdev.h>
67 #include <xen/interface/memory.h>
68 #include <xen/features.h>
69 #include <xen/xencons.h>
70 #include "setup_arch.h"
71 #include <bios_ebda.h>
73 /* Forward Declaration. */
74 void __init find_max_pfn(void);
76 static int xen_panic_event(struct notifier_block *, unsigned long, void *);
77 static struct notifier_block xen_panic_block = {
78 xen_panic_event, NULL, 0 /* try to go last */
81 extern char hypercall_page[PAGE_SIZE];
82 EXPORT_SYMBOL(hypercall_page);
84 int disable_pse __devinitdata = 0;
92 EXPORT_SYMBOL(efi_enabled);
95 /* cpu data as detected by the assembly code in head.S */
96 struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
97 /* common cpu data for all cpus */
98 struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
99 EXPORT_SYMBOL(boot_cpu_data);
101 unsigned long mmu_cr4_features;
104 int acpi_disabled = 0;
106 int acpi_disabled = 1;
108 EXPORT_SYMBOL(acpi_disabled);
111 int __initdata acpi_force = 0;
112 extern acpi_interrupt_flags acpi_sci_flags;
115 /* for MCA, but anyone else can use it if they want */
116 unsigned int machine_id;
118 EXPORT_SYMBOL(machine_id);
120 unsigned int machine_submodel_id;
121 unsigned int BIOS_revision;
122 unsigned int mca_pentium_flag;
124 /* For PCI or other memory-mapped resources */
125 unsigned long pci_mem_start = 0x10000000;
127 EXPORT_SYMBOL(pci_mem_start);
130 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
133 /* user-defined highmem size */
134 static unsigned int highmem_pages = -1;
139 struct drive_info_struct { char dummy[32]; } drive_info;
140 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || \
141 defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE)
142 EXPORT_SYMBOL(drive_info);
144 struct screen_info screen_info;
145 EXPORT_SYMBOL(screen_info);
146 struct apm_info apm_info;
147 EXPORT_SYMBOL(apm_info);
148 struct sys_desc_table_struct {
149 unsigned short length;
150 unsigned char table[0];
152 struct edid_info edid_info;
153 EXPORT_SYMBOL_GPL(edid_info);
154 struct ist_info ist_info;
155 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
156 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
157 EXPORT_SYMBOL(ist_info);
160 static void __init e820_setup_gap(struct e820entry *e820, int nr_map);
162 struct e820map machine_e820;
165 extern void early_cpu_init(void);
166 extern void generic_apic_probe(char *);
167 extern int root_mountflags;
169 unsigned long saved_videomode;
171 #define RAMDISK_IMAGE_START_MASK 0x07FF
172 #define RAMDISK_PROMPT_FLAG 0x8000
173 #define RAMDISK_LOAD_FLAG 0x4000
175 static char command_line[COMMAND_LINE_SIZE];
177 unsigned char __initdata boot_params[PARAM_SIZE];
179 static struct resource data_resource = {
180 .name = "Kernel data",
183 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
186 static struct resource code_resource = {
187 .name = "Kernel code",
190 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
193 static struct resource system_rom_resource = {
194 .name = "System ROM",
197 .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
200 static struct resource extension_rom_resource = {
201 .name = "Extension ROM",
204 .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
207 static struct resource adapter_rom_resources[] = { {
208 .name = "Adapter ROM",
211 .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
213 .name = "Adapter ROM",
216 .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
218 .name = "Adapter ROM",
221 .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
223 .name = "Adapter ROM",
226 .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
228 .name = "Adapter ROM",
231 .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
233 .name = "Adapter ROM",
236 .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
239 #define ADAPTER_ROM_RESOURCES \
240 (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
242 static struct resource video_rom_resource = {
246 .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
249 static struct resource video_ram_resource = {
250 .name = "Video RAM area",
253 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
256 static struct resource standard_io_resources[] = { {
260 .flags = IORESOURCE_BUSY | IORESOURCE_IO
265 .flags = IORESOURCE_BUSY | IORESOURCE_IO
270 .flags = IORESOURCE_BUSY | IORESOURCE_IO
275 .flags = IORESOURCE_BUSY | IORESOURCE_IO
280 .flags = IORESOURCE_BUSY | IORESOURCE_IO
282 .name = "dma page reg",
285 .flags = IORESOURCE_BUSY | IORESOURCE_IO
290 .flags = IORESOURCE_BUSY | IORESOURCE_IO
295 .flags = IORESOURCE_BUSY | IORESOURCE_IO
300 .flags = IORESOURCE_BUSY | IORESOURCE_IO
303 #define STANDARD_IO_RESOURCES \
304 (sizeof standard_io_resources / sizeof standard_io_resources[0])
306 #define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
308 static int __init romchecksum(unsigned char *rom, unsigned long length)
310 unsigned char *p, sum = 0;
312 for (p = rom; p < rom + length; p++)
317 static void __init probe_roms(void)
319 unsigned long start, length, upper;
324 /* Nothing to do if not running in dom0. */
325 if (!is_initial_xendomain())
330 upper = adapter_rom_resources[0].start;
331 for (start = video_rom_resource.start; start < upper; start += 2048) {
332 rom = isa_bus_to_virt(start);
333 if (!romsignature(rom))
336 video_rom_resource.start = start;
338 /* 0 < length <= 0x7f * 512, historically */
339 length = rom[2] * 512;
341 /* if checksum okay, trust length byte */
342 if (length && romchecksum(rom, length))
343 video_rom_resource.end = start + length - 1;
347 start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
352 request_resource(&iomem_resource, &system_rom_resource);
353 upper = system_rom_resource.start;
355 /* check for extension rom (ignore length byte!) */
356 rom = isa_bus_to_virt(extension_rom_resource.start);
357 if (romsignature(rom)) {
358 length = extension_rom_resource.end - extension_rom_resource.start + 1;
359 if (romchecksum(rom, length)) {
360 request_resource(&iomem_resource, &extension_rom_resource);
361 upper = extension_rom_resource.start;
365 /* check for adapter roms on 2k boundaries */
366 for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
367 rom = isa_bus_to_virt(start);
368 if (!romsignature(rom))
371 /* 0 < length <= 0x7f * 512, historically */
372 length = rom[2] * 512;
374 /* but accept any length that fits if checksum okay */
375 if (!length || start + length > upper || !romchecksum(rom, length))
378 adapter_rom_resources[i].start = start;
379 adapter_rom_resources[i].end = start + length - 1;
380 request_resource(&iomem_resource, &adapter_rom_resources[i]);
382 start = adapter_rom_resources[i++].end & ~2047UL;
387 * Point at the empty zero page to start with. We map the real shared_info
388 * page as soon as fixmap is up and running.
390 shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
391 EXPORT_SYMBOL(HYPERVISOR_shared_info);
393 unsigned long *phys_to_machine_mapping;
394 unsigned long *pfn_to_mfn_frame_list_list, *pfn_to_mfn_frame_list[16];
395 EXPORT_SYMBOL(phys_to_machine_mapping);
397 /* Raw start-of-day parameters from the hypervisor. */
398 start_info_t *xen_start_info;
399 EXPORT_SYMBOL(xen_start_info);
401 void __init add_memory_region(unsigned long long start,
402 unsigned long long size, int type)
410 printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
414 e820.map[x].addr = start;
415 e820.map[x].size = size;
416 e820.map[x].type = type;
419 } /* add_memory_region */
421 static void __init limit_regions(unsigned long long size)
423 unsigned long long current_addr = 0;
427 efi_memory_desc_t *md;
430 for (p = memmap.map, i = 0; p < memmap.map_end;
431 p += memmap.desc_size, i++) {
433 current_addr = md->phys_addr + (md->num_pages << 12);
434 if (md->type == EFI_CONVENTIONAL_MEMORY) {
435 if (current_addr >= size) {
437 (((current_addr-size) + PAGE_SIZE-1) >> PAGE_SHIFT);
438 memmap.nr_map = i + 1;
444 for (i = 0; i < e820.nr_map; i++) {
445 current_addr = e820.map[i].addr + e820.map[i].size;
446 if (current_addr < size)
449 if (e820.map[i].type != E820_RAM)
452 if (e820.map[i].addr >= size) {
454 * This region starts past the end of the
455 * requested size, skip it completely.
460 e820.map[i].size -= current_addr - size;
465 if (i==e820.nr_map && current_addr < size) {
467 * The e820 map finished before our requested size so
468 * extend the final entry to the requested address.
471 if (e820.map[i].type == E820_RAM)
472 e820.map[i].size -= current_addr - size;
474 add_memory_region(current_addr, size - current_addr, E820_RAM);
481 static void __init print_memory_map(char *who)
485 for (i = 0; i < e820.nr_map; i++) {
486 printk(" %s: %016Lx - %016Lx ", who,
488 e820.map[i].addr + e820.map[i].size);
489 switch (e820.map[i].type) {
490 case E820_RAM: printk("(usable)\n");
493 printk("(reserved)\n");
496 printk("(ACPI data)\n");
499 printk("(ACPI NVS)\n");
501 default: printk("type %lu\n", e820.map[i].type);
508 * Sanitize the BIOS e820 map.
510 * Some e820 responses include overlapping entries. The following
511 * replaces the original e820 map with a new one, removing overlaps.
514 struct change_member {
515 struct e820entry *pbios; /* pointer to original bios entry */
516 unsigned long long addr; /* address for this change point */
518 static struct change_member change_point_list[2*E820MAX] __initdata;
519 static struct change_member *change_point[2*E820MAX] __initdata;
520 static struct e820entry *overlap_list[E820MAX] __initdata;
521 static struct e820entry new_bios[E820MAX] __initdata;
523 int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
525 struct change_member *change_tmp;
526 unsigned long current_type, last_type;
527 unsigned long long last_addr;
528 int chgidx, still_changing;
531 int old_nr, new_nr, chg_nr;
535 Visually we're performing the following (1,2,3,4 = memory types)...
537 Sample memory map (w/overlaps):
538 ____22__________________
539 ______________________4_
540 ____1111________________
541 _44_____________________
542 11111111________________
543 ____________________33__
544 ___________44___________
545 __________33333_________
546 ______________22________
547 ___________________2222_
548 _________111111111______
549 _____________________11_
550 _________________4______
552 Sanitized equivalent (no overlap):
553 1_______________________
554 _44_____________________
555 ___1____________________
556 ____22__________________
557 ______11________________
558 _________1______________
559 __________3_____________
560 ___________44___________
561 _____________33_________
562 _______________2________
563 ________________1_______
564 _________________4______
565 ___________________2____
566 ____________________33__
567 ______________________4_
570 /* if there's only one memory region, don't bother */
576 /* bail out if we find any unreasonable addresses in bios map */
577 for (i=0; i<old_nr; i++)
578 if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
581 /* create pointers for initial change-point information (for sorting) */
582 for (i=0; i < 2*old_nr; i++)
583 change_point[i] = &change_point_list[i];
585 /* record all known change-points (starting and ending addresses),
586 omitting those that are for empty memory regions */
588 for (i=0; i < old_nr; i++) {
589 if (biosmap[i].size != 0) {
590 change_point[chgidx]->addr = biosmap[i].addr;
591 change_point[chgidx++]->pbios = &biosmap[i];
592 change_point[chgidx]->addr = biosmap[i].addr + biosmap[i].size;
593 change_point[chgidx++]->pbios = &biosmap[i];
596 chg_nr = chgidx; /* true number of change-points */
598 /* sort change-point list by memory addresses (low -> high) */
600 while (still_changing) {
602 for (i=1; i < chg_nr; i++) {
603 /* if <current_addr> > <last_addr>, swap */
604 /* or, if current=<start_addr> & last=<end_addr>, swap */
605 if ((change_point[i]->addr < change_point[i-1]->addr) ||
606 ((change_point[i]->addr == change_point[i-1]->addr) &&
607 (change_point[i]->addr == change_point[i]->pbios->addr) &&
608 (change_point[i-1]->addr != change_point[i-1]->pbios->addr))
611 change_tmp = change_point[i];
612 change_point[i] = change_point[i-1];
613 change_point[i-1] = change_tmp;
619 /* create a new bios memory map, removing overlaps */
620 overlap_entries=0; /* number of entries in the overlap table */
621 new_bios_entry=0; /* index for creating new bios map entries */
622 last_type = 0; /* start with undefined memory type */
623 last_addr = 0; /* start with 0 as last starting address */
624 /* loop through change-points, determining affect on the new bios map */
625 for (chgidx=0; chgidx < chg_nr; chgidx++)
627 /* keep track of all overlapping bios entries */
628 if (change_point[chgidx]->addr == change_point[chgidx]->pbios->addr)
630 /* add map entry to overlap list (> 1 entry implies an overlap) */
631 overlap_list[overlap_entries++]=change_point[chgidx]->pbios;
635 /* remove entry from list (order independent, so swap with last) */
636 for (i=0; i<overlap_entries; i++)
638 if (overlap_list[i] == change_point[chgidx]->pbios)
639 overlap_list[i] = overlap_list[overlap_entries-1];
643 /* if there are overlapping entries, decide which "type" to use */
644 /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
646 for (i=0; i<overlap_entries; i++)
647 if (overlap_list[i]->type > current_type)
648 current_type = overlap_list[i]->type;
649 /* continue building up new bios map based on this information */
650 if (current_type != last_type) {
651 if (last_type != 0) {
652 new_bios[new_bios_entry].size =
653 change_point[chgidx]->addr - last_addr;
654 /* move forward only if the new size was non-zero */
655 if (new_bios[new_bios_entry].size != 0)
656 if (++new_bios_entry >= E820MAX)
657 break; /* no more space left for new bios entries */
659 if (current_type != 0) {
660 new_bios[new_bios_entry].addr = change_point[chgidx]->addr;
661 new_bios[new_bios_entry].type = current_type;
662 last_addr=change_point[chgidx]->addr;
664 last_type = current_type;
667 new_nr = new_bios_entry; /* retain count for new bios entries */
669 /* copy new bios mapping into original location */
670 memcpy(biosmap, new_bios, new_nr*sizeof(struct e820entry));
677 * Copy the BIOS e820 map into a safe place.
679 * Sanity-check it while we're at it..
681 * If we're lucky and live on a modern system, the setup code
682 * will have given us a memory map that we can use to properly
683 * set up memory. If we aren't, we'll fake a memory map.
685 * We check to see that the memory map contains at least 2 elements
686 * before we'll use it, because the detection code in setup.S may
687 * not be perfect and most every PC known to man has two memory
688 * regions: one from 0 to 640k, and one from 1mb up. (The IBM
689 * thinkpad 560x, for example, does not cooperate with the memory
692 int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
695 /* Only one memory region (or negative)? Ignore it */
703 unsigned long long start = biosmap->addr;
704 unsigned long long size = biosmap->size;
705 unsigned long long end = start + size;
706 unsigned long type = biosmap->type;
708 /* Overflow in 64 bits? Ignore the memory map. */
714 * Some BIOSes claim RAM in the 640k - 1M region.
715 * Not right. Fix it up.
717 if (type == E820_RAM) {
718 if (start < 0x100000ULL && end > 0xA0000ULL) {
719 if (start < 0xA0000ULL)
720 add_memory_region(start, 0xA0000ULL-start, type);
721 if (end <= 0x100000ULL)
728 add_memory_region(start, size, type);
729 } while (biosmap++,--nr_map);
733 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
735 #ifdef CONFIG_EDD_MODULE
739 * copy_edd() - Copy the BIOS EDD information
740 * from boot_params into a safe place.
743 static inline void copy_edd(void)
745 memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
746 memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
747 edd.mbr_signature_nr = EDD_MBR_SIG_NR;
748 edd.edd_info_nr = EDD_NR;
751 static inline void copy_edd(void)
756 static void __init parse_cmdline_early (char ** cmdline_p)
758 char c = ' ', *to = command_line, *from = saved_command_line;
759 int len = 0, max_cmdline;
762 if ((max_cmdline = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
763 max_cmdline = COMMAND_LINE_SIZE;
764 memcpy(saved_command_line, xen_start_info->cmd_line, max_cmdline);
765 /* Save unparsed command line copy for /proc/cmdline */
766 saved_command_line[max_cmdline-1] = '\0';
772 * "mem=nopentium" disables the 4MB page tables.
773 * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
774 * to <mem>, overriding the bios size.
775 * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
776 * <start> to <start>+<mem>, overriding the bios size.
778 * HPA tells me bootloaders need to parse mem=, so no new
779 * option should be mem= [also see Documentation/i386/boot.txt]
781 if (!memcmp(from, "mem=", 4)) {
782 if (to != command_line)
784 if (!memcmp(from+4, "nopentium", 9)) {
786 clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
789 /* If the user specifies memory size, we
790 * limit the BIOS-provided memory map to
791 * that size. exactmap can be used to specify
792 * the exact map. mem=number can be used to
793 * trim the existing memory map.
795 unsigned long long mem_size;
797 mem_size = memparse(from+4, &from);
798 limit_regions(mem_size);
803 else if (!memcmp(from, "memmap=", 7)) {
804 if (to != command_line)
806 if (!memcmp(from+7, "exactmap", 8)) {
807 #ifdef CONFIG_CRASH_DUMP
808 /* If we are doing a crash dump, we
809 * still need to know the real mem
810 * size before original memory map is
814 saved_max_pfn = max_pfn;
820 /* If the user specifies memory size, we
821 * limit the BIOS-provided memory map to
822 * that size. exactmap can be used to specify
823 * the exact map. mem=number can be used to
824 * trim the existing memory map.
826 unsigned long long start_at, mem_size;
828 mem_size = memparse(from+7, &from);
830 start_at = memparse(from+1, &from);
831 add_memory_region(start_at, mem_size, E820_RAM);
832 } else if (*from == '#') {
833 start_at = memparse(from+1, &from);
834 add_memory_region(start_at, mem_size, E820_ACPI);
835 } else if (*from == '$') {
836 start_at = memparse(from+1, &from);
837 add_memory_region(start_at, mem_size, E820_RESERVED);
839 limit_regions(mem_size);
845 else if (!memcmp(from, "noexec=", 7))
846 noexec_setup(from + 7);
849 #ifdef CONFIG_X86_MPPARSE
851 * If the BIOS enumerates physical processors before logical,
852 * maxcpus=N at enumeration-time can be used to disable HT.
854 else if (!memcmp(from, "maxcpus=", 8)) {
855 extern unsigned int maxcpus;
857 maxcpus = simple_strtoul(from + 8, NULL, 0);
862 /* "acpi=off" disables both ACPI table parsing and interpreter */
863 else if (!memcmp(from, "acpi=off", 8)) {
867 /* acpi=force to over-ride black-list */
868 else if (!memcmp(from, "acpi=force", 10)) {
874 /* acpi=strict disables out-of-spec workarounds */
875 else if (!memcmp(from, "acpi=strict", 11)) {
879 /* Limit ACPI just to boot-time to enable HT */
880 else if (!memcmp(from, "acpi=ht", 7)) {
886 /* "pci=noacpi" disable ACPI IRQ routing and PCI scan */
887 else if (!memcmp(from, "pci=noacpi", 10)) {
890 /* "acpi=noirq" disables ACPI interrupt routing */
891 else if (!memcmp(from, "acpi=noirq", 10)) {
895 else if (!memcmp(from, "acpi_sci=edge", 13))
896 acpi_sci_flags.trigger = 1;
898 else if (!memcmp(from, "acpi_sci=level", 14))
899 acpi_sci_flags.trigger = 3;
901 else if (!memcmp(from, "acpi_sci=high", 13))
902 acpi_sci_flags.polarity = 1;
904 else if (!memcmp(from, "acpi_sci=low", 12))
905 acpi_sci_flags.polarity = 3;
907 #ifdef CONFIG_X86_IO_APIC
908 else if (!memcmp(from, "acpi_skip_timer_override", 24))
909 acpi_skip_timer_override = 1;
911 if (!memcmp(from, "disable_timer_pin_1", 19))
912 disable_timer_pin_1 = 1;
913 if (!memcmp(from, "enable_timer_pin_1", 18))
914 disable_timer_pin_1 = -1;
916 /* disable IO-APIC */
917 else if (!memcmp(from, "noapic", 6))
918 disable_ioapic_setup();
919 #endif /* CONFIG_X86_IO_APIC */
920 #endif /* CONFIG_ACPI */
922 #ifdef CONFIG_X86_LOCAL_APIC
923 /* enable local APIC */
924 else if (!memcmp(from, "lapic", 5))
927 /* disable local APIC */
928 else if (!memcmp(from, "nolapic", 6))
930 #endif /* CONFIG_X86_LOCAL_APIC */
933 /* crashkernel=size@addr specifies the location to reserve for
934 * a crash kernel. By reserving this memory we guarantee
935 * that linux never set's it up as a DMA target.
936 * Useful for holding code to do something appropriate
937 * after a kernel panic.
939 else if (!memcmp(from, "crashkernel=", 12)) {
940 unsigned long size, base;
941 size = memparse(from+12, &from);
943 base = memparse(from+1, &from);
944 /* FIXME: Do I want a sanity check
945 * to validate the memory range?
947 crashk_res.start = base;
948 crashk_res.end = base + size - 1;
952 #ifdef CONFIG_PROC_VMCORE
953 /* elfcorehdr= specifies the location of elf core header
954 * stored by the crashed kernel.
956 else if (!memcmp(from, "elfcorehdr=", 11))
957 elfcorehdr_addr = memparse(from+11, &from);
961 * highmem=size forces highmem to be exactly 'size' bytes.
962 * This works even on boxes that have no highmem otherwise.
963 * This also works to reduce highmem size on bigger boxes.
965 else if (!memcmp(from, "highmem=", 8))
966 highmem_pages = memparse(from+8, &from) >> PAGE_SHIFT;
969 * vmalloc=size forces the vmalloc area to be exactly 'size'
970 * bytes. This can be used to increase (or decrease) the
971 * vmalloc area - the default is 128m.
973 else if (!memcmp(from, "vmalloc=", 8))
974 __VMALLOC_RESERVE = memparse(from+8, &from);
980 if (COMMAND_LINE_SIZE <= ++len)
985 *cmdline_p = command_line;
987 printk(KERN_INFO "user-defined physical RAM map:\n");
988 print_memory_map("user");
993 * Callback for efi_memory_walk.
996 efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
998 unsigned long *max_pfn = arg, pfn;
1001 pfn = PFN_UP(end -1);
1009 efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
1011 memory_present(0, start, end);
1016 * This function checks if the entire range <start,end> is mapped with type.
1018 * Note: this function only works correct if the e820 table is sorted and
1019 * not-overlapping, which is the case
1022 e820_all_mapped(unsigned long s, unsigned long e, unsigned type)
1027 for (i = 0; i < e820.nr_map; i++) {
1028 struct e820entry *ei = &e820.map[i];
1029 if (type && ei->type != type)
1031 /* is the region (part) in overlap with the current region ?*/
1032 if (ei->addr >= end || ei->addr + ei->size <= start)
1034 /* if the region is at the beginning of <start,end> we move
1035 * start to the end of the region since it's ok until there
1037 if (ei->addr <= start)
1038 start = ei->addr + ei->size;
1039 /* if start is now at or beyond end, we're done, full
1042 return 1; /* we're done */
1048 * Find the highest page frame number we have available
1050 void __init find_max_pfn(void)
1056 efi_memmap_walk(efi_find_max_pfn, &max_pfn);
1057 efi_memmap_walk(efi_memory_present_wrapper, NULL);
1061 for (i = 0; i < e820.nr_map; i++) {
1062 unsigned long start, end;
1064 if (e820.map[i].type != E820_RAM)
1066 start = PFN_UP(e820.map[i].addr);
1067 end = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
1072 memory_present(0, start, end);
1077 * Determine low and high memory ranges:
1079 unsigned long __init find_max_low_pfn(void)
1081 unsigned long max_low_pfn;
1083 max_low_pfn = max_pfn;
1084 if (max_low_pfn > MAXMEM_PFN) {
1085 if (highmem_pages == -1)
1086 highmem_pages = max_pfn - MAXMEM_PFN;
1087 if (highmem_pages + MAXMEM_PFN < max_pfn)
1088 max_pfn = MAXMEM_PFN + highmem_pages;
1089 if (highmem_pages + MAXMEM_PFN > max_pfn) {
1090 printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages));
1093 max_low_pfn = MAXMEM_PFN;
1094 #ifndef CONFIG_HIGHMEM
1095 /* Maximum memory usable is what is directly addressable */
1096 printk(KERN_WARNING "Warning only %ldMB will be used.\n",
1098 if (max_pfn > MAX_NONPAE_PFN)
1099 printk(KERN_WARNING "Use a PAE enabled kernel.\n");
1101 printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
1102 max_pfn = MAXMEM_PFN;
1103 #else /* !CONFIG_HIGHMEM */
1104 #ifndef CONFIG_X86_PAE
1105 if (max_pfn > MAX_NONPAE_PFN) {
1106 max_pfn = MAX_NONPAE_PFN;
1107 printk(KERN_WARNING "Warning only 4GB will be used.\n");
1108 printk(KERN_WARNING "Use a PAE enabled kernel.\n");
1110 #endif /* !CONFIG_X86_PAE */
1111 #endif /* !CONFIG_HIGHMEM */
1113 if (highmem_pages == -1)
1115 #ifdef CONFIG_HIGHMEM
1116 if (highmem_pages >= max_pfn) {
1117 printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn));
1120 if (highmem_pages) {
1121 if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){
1122 printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages));
1125 max_low_pfn -= highmem_pages;
1129 printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n");
1136 * Free all available memory for boot time allocation. Used
1137 * as a callback function by efi_memory_walk()
1141 free_available_memory(unsigned long start, unsigned long end, void *arg)
1143 /* check max_low_pfn */
1144 if (start >= (max_low_pfn << PAGE_SHIFT))
1146 if (end >= (max_low_pfn << PAGE_SHIFT))
1147 end = max_low_pfn << PAGE_SHIFT;
1149 free_bootmem(start, end - start);
1154 * Register fully available low RAM pages with the bootmem allocator.
1156 static void __init register_bootmem_low_pages(unsigned long max_low_pfn)
1161 efi_memmap_walk(free_available_memory, NULL);
1164 for (i = 0; i < e820.nr_map; i++) {
1165 unsigned long curr_pfn, last_pfn, size;
1167 * Reserve usable low memory
1169 if (e820.map[i].type != E820_RAM)
1172 * We are rounding up the start address of usable memory:
1174 curr_pfn = PFN_UP(e820.map[i].addr);
1175 if (curr_pfn >= max_low_pfn)
1178 * ... and at the end of the usable range downwards:
1180 last_pfn = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
1184 * Truncate to the number of actual pages currently
1187 if (last_pfn > xen_start_info->nr_pages)
1188 last_pfn = xen_start_info->nr_pages;
1191 if (last_pfn > max_low_pfn)
1192 last_pfn = max_low_pfn;
1195 * .. finally, did all the rounding and playing
1196 * around just make the area go away?
1198 if (last_pfn <= curr_pfn)
1201 size = last_pfn - curr_pfn;
1202 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
1208 * workaround for Dell systems that neglect to reserve EBDA
1210 static void __init reserve_ebda_region(void)
1213 addr = get_bios_ebda();
1215 reserve_bootmem(addr, PAGE_SIZE);
1219 #ifndef CONFIG_NEED_MULTIPLE_NODES
1220 void __init setup_bootmem_allocator(void);
1221 static unsigned long __init setup_memory(void)
1224 * partially used pages are not usable - thus
1225 * we are rounding upwards:
1227 min_low_pfn = PFN_UP(__pa(xen_start_info->pt_base)) +
1228 xen_start_info->nr_pt_frames;
1232 max_low_pfn = find_max_low_pfn();
1234 #ifdef CONFIG_HIGHMEM
1235 highstart_pfn = highend_pfn = max_pfn;
1236 if (max_pfn > max_low_pfn) {
1237 highstart_pfn = max_low_pfn;
1239 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
1240 pages_to_mb(highend_pfn - highstart_pfn));
1242 printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
1243 pages_to_mb(max_low_pfn));
1245 setup_bootmem_allocator();
1250 void __init zone_sizes_init(void)
1252 unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0};
1253 unsigned int max_dma, low;
1256 * XEN: Our notion of "DMA memory" is fake when running over Xen.
1257 * We simply put all RAM in the DMA zone so that those drivers which
1258 * needlessly specify GFP_DMA do not get starved of RAM unnecessarily.
1259 * Those drivers that *do* require lowmem are screwed anyway when
1262 max_dma = max_low_pfn;
1266 zones_size[ZONE_DMA] = low;
1268 zones_size[ZONE_DMA] = max_dma;
1269 zones_size[ZONE_NORMAL] = low - max_dma;
1270 #ifdef CONFIG_HIGHMEM
1271 zones_size[ZONE_HIGHMEM] = highend_pfn - low;
1274 free_area_init(zones_size);
1277 extern unsigned long __init setup_memory(void);
1278 extern void zone_sizes_init(void);
1279 #endif /* !CONFIG_NEED_MULTIPLE_NODES */
1281 void __init setup_bootmem_allocator(void)
1283 unsigned long bootmap_size;
1285 * Initialize the boot-time allocator (with low memory only):
1287 bootmap_size = init_bootmem(min_low_pfn, max_low_pfn);
1289 register_bootmem_low_pages(max_low_pfn);
1292 * Reserve the bootmem bitmap itself as well. We do this in two
1293 * steps (first step was init_bootmem()) because this catches
1294 * the (very unlikely) case of us accidentally initializing the
1295 * bootmem allocator with an invalid RAM area.
1297 reserve_bootmem(__PHYSICAL_START, (PFN_PHYS(min_low_pfn) +
1298 bootmap_size + PAGE_SIZE-1) - (__PHYSICAL_START));
1302 * reserve physical page 0 - it's a special BIOS page on many boxes,
1303 * enabling clean reboots, SMP operation, laptop functions.
1305 reserve_bootmem(0, PAGE_SIZE);
1307 /* reserve EBDA region, it's a 4K region */
1308 reserve_ebda_region();
1310 /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent
1311 PCI prefetch into it (errata #56). Usually the page is reserved anyways,
1312 unless you have no PS/2 mouse plugged in. */
1313 if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
1314 boot_cpu_data.x86 == 6)
1315 reserve_bootmem(0xa0000 - 4096, 4096);
1319 * But first pinch a few for the stack/trampoline stuff
1320 * FIXME: Don't need the extra page at 4K, but need to fix
1321 * trampoline before removing it. (see the GDT stuff)
1323 reserve_bootmem(PAGE_SIZE, PAGE_SIZE);
1325 #ifdef CONFIG_ACPI_SLEEP
1327 * Reserve low memory region for sleep support.
1329 acpi_reserve_bootmem();
1331 #endif /* !CONFIG_XEN */
1333 #ifdef CONFIG_BLK_DEV_INITRD
1334 if (xen_start_info->mod_start) {
1335 if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
1336 /*reserve_bootmem(INITRD_START, INITRD_SIZE);*/
1337 initrd_start = INITRD_START + PAGE_OFFSET;
1338 initrd_end = initrd_start+INITRD_SIZE;
1339 initrd_below_start_ok = 1;
1342 printk(KERN_ERR "initrd extends beyond end of memory "
1343 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
1344 INITRD_START + INITRD_SIZE,
1345 max_low_pfn << PAGE_SHIFT);
1351 if (crashk_res.start != crashk_res.end)
1352 reserve_bootmem(crashk_res.start,
1353 crashk_res.end - crashk_res.start + 1);
1356 if (!xen_feature(XENFEAT_auto_translated_physmap))
1357 phys_to_machine_mapping =
1358 (unsigned long *)xen_start_info->mfn_list;
1362 * The node 0 pgdat is initialized before all of these because
1363 * it's needed for bootmem. node>0 pgdats have their virtual
1364 * space allocated before the pagetables are in place to access
1365 * them, so they can't be cleared then.
1367 * This should all compile down to nothing when NUMA is off.
1369 void __init remapped_pgdat_init(void)
1373 for_each_online_node(nid) {
1375 memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
1380 * Request address space for all standard RAM and ROM resources
1381 * and also for regions reported as reserved by the e820.
1384 legacy_init_iomem_resources(struct resource *code_resource, struct resource *data_resource)
1387 struct e820entry *map = e820.map;
1388 int nr_map = e820.nr_map;
1389 #ifdef CONFIG_XEN_PRIVILEGED_GUEST
1390 struct xen_memory_map memmap;
1392 map = machine_e820.map;
1393 memmap.nr_entries = E820MAX;
1395 set_xen_guest_handle(memmap.buffer, map);
1397 if(HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
1399 machine_e820.nr_map = memmap.nr_entries;
1400 nr_map = memmap.nr_entries;
1401 e820_setup_gap(map, memmap.nr_entries);
1406 for (i = 0; i < nr_map; i++) {
1407 struct resource *res;
1408 if (map[i].addr + map[i].size > 0x100000000ULL)
1410 res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
1411 switch (map[i].type) {
1412 case E820_RAM: res->name = "System RAM"; break;
1413 case E820_ACPI: res->name = "ACPI Tables"; break;
1414 case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
1415 default: res->name = "reserved";
1417 res->start = map[i].addr;
1418 res->end = res->start + map[i].size - 1;
1419 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
1420 if (request_resource(&iomem_resource, res)) {
1424 if (map[i].type == E820_RAM) {
1426 * We don't know which RAM region contains kernel data,
1427 * so we try it repeatedly and let the resource manager
1431 request_resource(res, code_resource);
1432 request_resource(res, data_resource);
1435 request_resource(res, &crashk_res);
1442 * Request address space for all standard resources
1444 * This is called just before pcibios_init(), which is also a
1445 * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
1447 static int __init request_standard_resources(void)
1451 /* Nothing to do if not running in dom0. */
1452 if (!is_initial_xendomain())
1455 printk("Setting up standard PCI resources\n");
1457 efi_initialize_iomem_resources(&code_resource, &data_resource);
1459 legacy_init_iomem_resources(&code_resource, &data_resource);
1461 /* EFI systems may still have VGA */
1462 request_resource(&iomem_resource, &video_ram_resource);
1464 /* request I/O space for devices used on all i[345]86 PCs */
1465 for (i = 0; i < STANDARD_IO_RESOURCES; i++)
1466 request_resource(&ioport_resource, &standard_io_resources[i]);
1470 subsys_initcall(request_standard_resources);
1473 * Locate a unused range of the physical address space below 4G which
1474 * can be used for PCI mappings.
1477 e820_setup_gap(struct e820entry *e820, int nr_map)
1479 unsigned long gapstart, gapsize, round;
1480 unsigned long long last;
1484 * Search for the bigest gap in the low 32 bits of the e820
1487 last = 0x100000000ull;
1488 gapstart = 0x10000000;
1492 unsigned long long start = e820[i].addr;
1493 unsigned long long end = start + e820[i].size;
1496 * Since "last" is at most 4GB, we know we'll
1497 * fit in 32 bits if this condition is true
1500 unsigned long gap = last - end;
1502 if (gap > gapsize) {
1512 * See how much we want to round up: start off with
1513 * rounding to the next 1MB area.
1516 while ((gapsize >> 4) > round)
1518 /* Fun with two's complement */
1519 pci_mem_start = (gapstart + round) & -round;
1521 printk("Allocating PCI resources starting at %08lx (gap: %08lx:%08lx)\n",
1522 pci_mem_start, gapstart, gapsize);
1525 static void __init register_memory(void)
1528 e820_setup_gap(e820.map, e820.nr_map);
1533 static void set_mca_bus(int x)
1538 static void set_mca_bus(int x) { }
1542 * Determine if we were loaded by an EFI loader. If so, then we have also been
1543 * passed the efi memmap, systab, etc., so we should use these data structures
1544 * for initialization. Note, the efi init code path is determined by the
1545 * global efi_enabled. This allows the same kernel image to be used on existing
1546 * systems (with a traditional BIOS) as well as on EFI systems.
1548 void __init setup_arch(char **cmdline_p)
1551 struct physdev_set_iopl set_iopl;
1552 unsigned long max_low_pfn;
1554 /* Force a quick death if the kernel panics (not domain 0). */
1555 extern int panic_timeout;
1556 if (!panic_timeout && !is_initial_xendomain())
1559 /* Register a call for panic conditions. */
1560 atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
1562 HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments);
1563 HYPERVISOR_vm_assist(VMASST_CMD_enable,
1564 VMASST_TYPE_writable_pagetables);
1566 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
1567 pre_setup_arch_hook();
1571 * FIXME: This isn't an official loader_type right
1572 * now but does currently work with elilo.
1573 * If we were configured as an EFI kernel, check to make
1574 * sure that we were loaded correctly from elilo and that
1575 * the system table is valid. If not, then initialize normally.
1578 if ((LOADER_TYPE == 0x50) && EFI_SYSTAB)
1582 /* This must be initialized to UNNAMED_MAJOR for ipconfig to work
1583 properly. Setting ROOT_DEV to default to /dev/ram0 breaks initrd.
1585 ROOT_DEV = MKDEV(UNNAMED_MAJOR,0);
1586 drive_info = DRIVE_INFO;
1587 screen_info = SCREEN_INFO;
1588 edid_info = EDID_INFO;
1589 apm_info.bios = APM_BIOS_INFO;
1590 ist_info = IST_INFO;
1591 saved_videomode = VIDEO_MODE;
1592 if( SYS_DESC_TABLE.length != 0 ) {
1593 set_mca_bus(SYS_DESC_TABLE.table[3] & 0x2);
1594 machine_id = SYS_DESC_TABLE.table[0];
1595 machine_submodel_id = SYS_DESC_TABLE.table[1];
1596 BIOS_revision = SYS_DESC_TABLE.table[2];
1598 bootloader_type = LOADER_TYPE;
1600 if (is_initial_xendomain()) {
1601 /* This is drawn from a dump from vgacon:startup in
1602 * standard Linux. */
1603 screen_info.orig_video_mode = 3;
1604 screen_info.orig_video_isVGA = 1;
1605 screen_info.orig_video_lines = 25;
1606 screen_info.orig_video_cols = 80;
1607 screen_info.orig_video_ega_bx = 3;
1608 screen_info.orig_video_points = 16;
1609 screen_info.orig_y = screen_info.orig_video_lines - 1;
1610 if (xen_start_info->console.dom0.info_size >=
1611 sizeof(struct dom0_vga_console_info)) {
1612 const struct dom0_vga_console_info *info =
1613 (struct dom0_vga_console_info *)(
1614 (char *)xen_start_info +
1615 xen_start_info->console.dom0.info_off);
1616 dom0_init_screen_info(info);
1618 xen_start_info->console.domU.mfn = 0;
1619 xen_start_info->console.domU.evtchn = 0;
1621 screen_info.orig_video_isVGA = 0;
1623 #ifdef CONFIG_BLK_DEV_RAM
1624 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
1625 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
1626 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
1629 setup_xen_features();
1635 printk(KERN_INFO "BIOS-provided physical RAM map:\n");
1636 print_memory_map(machine_specific_memory_setup());
1641 if (!MOUNT_ROOT_RDONLY)
1642 root_mountflags &= ~MS_RDONLY;
1643 init_mm.start_code = (unsigned long) _text;
1644 init_mm.end_code = (unsigned long) _etext;
1645 init_mm.end_data = (unsigned long) _edata;
1646 init_mm.brk = (PFN_UP(__pa(xen_start_info->pt_base)) +
1647 xen_start_info->nr_pt_frames) << PAGE_SHIFT;
1649 code_resource.start = virt_to_phys(_text);
1650 code_resource.end = virt_to_phys(_etext)-1;
1651 data_resource.start = virt_to_phys(_etext);
1652 data_resource.end = virt_to_phys(_edata)-1;
1654 parse_cmdline_early(cmdline_p);
1656 #ifdef CONFIG_EARLY_PRINTK
1658 char *s = strstr(*cmdline_p, "earlyprintk=");
1660 setup_early_printk(strchr(s, '=') + 1);
1661 printk("early console enabled\n");
1666 max_low_pfn = setup_memory();
1669 * NOTE: before this point _nobody_ is allowed to allocate
1670 * any memory using the bootmem allocator. Although the
1671 * alloctor is now initialised only the first 8Mb of the kernel
1672 * virtual address space has been mapped. All allocations before
1673 * paging_init() has completed must use the alloc_bootmem_low_pages()
1674 * variant (which allocates DMA'able memory) and care must be taken
1675 * not to exceed the 8Mb limit.
1679 smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
1682 remapped_pgdat_init();
1686 #ifdef CONFIG_X86_FIND_SMP_CONFIG
1688 * Find and reserve possible boot-time SMP configuration:
1693 /* Make sure we have a correctly sized P->M table. */
1694 if (!xen_feature(XENFEAT_auto_translated_physmap)) {
1695 phys_to_machine_mapping = alloc_bootmem_low_pages(
1696 max_pfn * sizeof(unsigned long));
1697 memset(phys_to_machine_mapping, ~0,
1698 max_pfn * sizeof(unsigned long));
1699 memcpy(phys_to_machine_mapping,
1700 (unsigned long *)xen_start_info->mfn_list,
1701 xen_start_info->nr_pages * sizeof(unsigned long));
1703 __pa(xen_start_info->mfn_list),
1704 PFN_PHYS(PFN_UP(xen_start_info->nr_pages *
1705 sizeof(unsigned long))));
1708 * Initialise the list of the frames that specify the list of
1709 * frames that make up the p2m table. Used by save/restore
1711 pfn_to_mfn_frame_list_list = alloc_bootmem_low_pages(PAGE_SIZE);
1712 HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
1713 virt_to_mfn(pfn_to_mfn_frame_list_list);
1715 fpp = PAGE_SIZE/sizeof(unsigned long);
1716 for (i=0, j=0, k=-1; i< max_pfn; i+=fpp, j++) {
1717 if ((j % fpp) == 0) {
1720 pfn_to_mfn_frame_list[k] =
1721 alloc_bootmem_low_pages(PAGE_SIZE);
1722 pfn_to_mfn_frame_list_list[k] =
1723 virt_to_mfn(pfn_to_mfn_frame_list[k]);
1726 pfn_to_mfn_frame_list[k][j] =
1727 virt_to_mfn(&phys_to_machine_mapping[i]);
1729 HYPERVISOR_shared_info->arch.max_pfn = max_pfn;
1733 * NOTE: at this point the bootmem allocator is fully available.
1736 if (is_initial_xendomain())
1739 #ifdef CONFIG_X86_GENERICARCH
1740 generic_apic_probe(*cmdline_p);
1746 HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);
1749 if (!is_initial_xendomain()) {
1750 printk(KERN_INFO "ACPI in unprivileged domain disabled\n");
1756 * Parse the ACPI tables for possible boot-time SMP configuration.
1758 acpi_boot_table_init();
1761 #ifdef CONFIG_X86_IO_APIC
1762 check_acpi_pci(); /* Checks more than just ACPI actually */
1768 #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
1770 printk(KERN_WARNING "More than 8 CPUs detected and "
1771 "CONFIG_X86_PC cannot handle it.\nUse "
1772 "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
1775 #ifdef CONFIG_X86_LOCAL_APIC
1776 if (smp_found_config)
1779 #if defined(CONFIG_XEN) && defined(CONFIG_SMP)
1780 prefill_possible_map();
1785 if (is_initial_xendomain()) {
1787 #if defined(CONFIG_VGA_CONSOLE)
1789 (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1790 conswitchp = &vga_con;
1791 #elif defined(CONFIG_DUMMY_CONSOLE)
1792 conswitchp = &dummy_con;
1796 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
1797 conswitchp = &dummy_con;
1800 #ifdef CONFIG_X86_TSC
1806 xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
1808 HYPERVISOR_shutdown(SHUTDOWN_crash);
1809 /* we're never actually going to get here... */
1813 static __init int add_pcspkr(void)
1815 struct platform_device *pd;
1818 pd = platform_device_alloc("pcspkr", -1);
1822 ret = platform_device_add(pd);
1824 platform_device_put(pd);
1828 device_initcall(add_pcspkr);
1833 * c-file-style:"k&r"