2 * linux/arch/x86-64/kernel/setup.c
4 * Copyright (C) 1995 Linus Torvalds
6 * Nov 2001 Dave Jones <davej@suse.de>
7 * Forked from i386 setup code.
11 * This file handles the architecture-dependent parts of initialization
14 #include <linux/errno.h>
15 #include <linux/sched.h>
16 #include <linux/kernel.h>
18 #include <linux/stddef.h>
19 #include <linux/unistd.h>
20 #include <linux/ptrace.h>
21 #include <linux/slab.h>
22 #include <linux/user.h>
23 #include <linux/a.out.h>
24 #include <linux/screen_info.h>
25 #include <linux/ioport.h>
26 #include <linux/delay.h>
27 #include <linux/init.h>
28 #include <linux/initrd.h>
29 #include <linux/highmem.h>
30 #include <linux/bootmem.h>
31 #include <linux/module.h>
32 #include <asm/processor.h>
33 #include <linux/console.h>
34 #include <linux/seq_file.h>
35 #include <linux/crash_dump.h>
36 #include <linux/root_dev.h>
37 #include <linux/pci.h>
38 #include <linux/acpi.h>
39 #include <linux/kallsyms.h>
40 #include <linux/edd.h>
41 #include <linux/mmzone.h>
42 #include <linux/kexec.h>
43 #include <linux/cpufreq.h>
44 #include <linux/dmi.h>
45 #include <linux/dma-mapping.h>
46 #include <linux/ctype.h>
49 #include <asm/uaccess.h>
50 #include <asm/system.h>
55 #include <video/edid.h>
58 #include <asm/mpspec.h>
59 #include <asm/mmu_context.h>
60 #include <asm/bootsetup.h>
61 #include <asm/proto.h>
62 #include <asm/setup.h>
63 #include <asm/mach_apic.h>
65 #include <asm/sections.h>
68 #include <linux/percpu.h>
69 #include <linux/pfn.h>
70 #include <xen/interface/physdev.h>
71 #include "setup_arch_pre.h"
72 #include <asm/hypervisor.h>
73 #include <xen/interface/nmi.h>
74 #include <xen/features.h>
75 #include <xen/xencons.h>
76 #include <asm/mach-xen/setup_arch_post.h>
77 #include <xen/interface/memory.h>
79 extern unsigned long start_pfn;
80 extern struct edid_info edid_info;
81 EXPORT_SYMBOL_GPL(edid_info);
83 shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
84 EXPORT_SYMBOL(HYPERVISOR_shared_info);
86 extern char hypercall_page[PAGE_SIZE];
87 EXPORT_SYMBOL(hypercall_page);
89 /* Allows setting of maximum possible memory size */
90 unsigned long xen_override_max_pfn;
92 static int xen_panic_event(struct notifier_block *, unsigned long, void *);
93 static struct notifier_block xen_panic_block = {
94 xen_panic_event, NULL, 0 /* try to go last */
97 unsigned long *phys_to_machine_mapping;
98 unsigned long *pfn_to_mfn_frame_list_list, *pfn_to_mfn_frame_list[512];
100 EXPORT_SYMBOL(phys_to_machine_mapping);
102 DEFINE_PER_CPU(multicall_entry_t, multicall_list[8]);
103 DEFINE_PER_CPU(int, nr_multicall_ents);
105 /* Raw start-of-day parameters from the hypervisor. */
106 start_info_t *xen_start_info;
107 EXPORT_SYMBOL(xen_start_info);
114 struct cpuinfo_x86 boot_cpu_data __read_mostly;
115 EXPORT_SYMBOL(boot_cpu_data);
117 unsigned long mmu_cr4_features;
120 EXPORT_SYMBOL(acpi_disabled);
122 extern int __initdata acpi_ht;
123 extern acpi_interrupt_flags acpi_sci_flags;
124 int __initdata acpi_force = 0;
127 int acpi_numa __initdata;
129 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
132 unsigned long saved_video_mode;
138 char dmi_alloc_data[DMI_MAX_DATA];
143 struct screen_info screen_info;
144 EXPORT_SYMBOL(screen_info);
145 struct sys_desc_table_struct {
146 unsigned short length;
147 unsigned char table[0];
150 struct edid_info edid_info;
153 struct e820map machine_e820;
156 extern int root_mountflags;
158 char command_line[COMMAND_LINE_SIZE];
160 struct resource standard_io_resources[] = {
161 { .name = "dma1", .start = 0x00, .end = 0x1f,
162 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
163 { .name = "pic1", .start = 0x20, .end = 0x21,
164 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
165 { .name = "timer0", .start = 0x40, .end = 0x43,
166 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
167 { .name = "timer1", .start = 0x50, .end = 0x53,
168 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
169 { .name = "keyboard", .start = 0x60, .end = 0x6f,
170 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
171 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
172 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
173 { .name = "pic2", .start = 0xa0, .end = 0xa1,
174 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
175 { .name = "dma2", .start = 0xc0, .end = 0xdf,
176 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
177 { .name = "fpu", .start = 0xf0, .end = 0xff,
178 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
181 #define STANDARD_IO_RESOURCES \
182 (sizeof standard_io_resources / sizeof standard_io_resources[0])
184 #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
186 struct resource data_resource = {
187 .name = "Kernel data",
190 .flags = IORESOURCE_RAM,
192 struct resource code_resource = {
193 .name = "Kernel code",
196 .flags = IORESOURCE_RAM,
199 #define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
201 static struct resource system_rom_resource = {
202 .name = "System ROM",
205 .flags = IORESOURCE_ROM,
208 static struct resource extension_rom_resource = {
209 .name = "Extension ROM",
212 .flags = IORESOURCE_ROM,
215 static struct resource adapter_rom_resources[] = {
216 { .name = "Adapter ROM", .start = 0xc8000, .end = 0,
217 .flags = IORESOURCE_ROM },
218 { .name = "Adapter ROM", .start = 0, .end = 0,
219 .flags = IORESOURCE_ROM },
220 { .name = "Adapter ROM", .start = 0, .end = 0,
221 .flags = IORESOURCE_ROM },
222 { .name = "Adapter ROM", .start = 0, .end = 0,
223 .flags = IORESOURCE_ROM },
224 { .name = "Adapter ROM", .start = 0, .end = 0,
225 .flags = IORESOURCE_ROM },
226 { .name = "Adapter ROM", .start = 0, .end = 0,
227 .flags = IORESOURCE_ROM }
230 #define ADAPTER_ROM_RESOURCES \
231 (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
233 static struct resource video_rom_resource = {
237 .flags = IORESOURCE_ROM,
240 static struct resource video_ram_resource = {
241 .name = "Video RAM area",
244 .flags = IORESOURCE_RAM,
247 #define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
249 static int __init romchecksum(unsigned char *rom, unsigned long length)
251 unsigned char *p, sum = 0;
253 for (p = rom; p < rom + length; p++)
258 static void __init probe_roms(void)
260 unsigned long start, length, upper;
265 /* Nothing to do if not running in dom0. */
266 if (!is_initial_xendomain())
271 upper = adapter_rom_resources[0].start;
272 for (start = video_rom_resource.start; start < upper; start += 2048) {
273 rom = isa_bus_to_virt(start);
274 if (!romsignature(rom))
277 video_rom_resource.start = start;
279 /* 0 < length <= 0x7f * 512, historically */
280 length = rom[2] * 512;
282 /* if checksum okay, trust length byte */
283 if (length && romchecksum(rom, length))
284 video_rom_resource.end = start + length - 1;
286 request_resource(&iomem_resource, &video_rom_resource);
290 start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
295 request_resource(&iomem_resource, &system_rom_resource);
296 upper = system_rom_resource.start;
298 /* check for extension rom (ignore length byte!) */
299 rom = isa_bus_to_virt(extension_rom_resource.start);
300 if (romsignature(rom)) {
301 length = extension_rom_resource.end - extension_rom_resource.start + 1;
302 if (romchecksum(rom, length)) {
303 request_resource(&iomem_resource, &extension_rom_resource);
304 upper = extension_rom_resource.start;
308 /* check for adapter roms on 2k boundaries */
309 for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
310 rom = isa_bus_to_virt(start);
311 if (!romsignature(rom))
314 /* 0 < length <= 0x7f * 512, historically */
315 length = rom[2] * 512;
317 /* but accept any length that fits if checksum okay */
318 if (!length || start + length > upper || !romchecksum(rom, length))
321 adapter_rom_resources[i].start = start;
322 adapter_rom_resources[i].end = start + length - 1;
323 request_resource(&iomem_resource, &adapter_rom_resources[i]);
325 start = adapter_rom_resources[i++].end & ~2047UL;
329 /* Check for full argument with no trailing characters */
330 static int fullarg(char *p, char *arg)
333 return !memcmp(p, arg, l) && (p[l] == 0 || isspace(p[l]));
336 static __init void parse_cmdline_early (char ** cmdline_p)
338 char c = ' ', *to = command_line, *from = COMMAND_LINE;
348 * If the BIOS enumerates physical processors before logical,
349 * maxcpus=N at enumeration-time can be used to disable HT.
351 else if (!memcmp(from, "maxcpus=", 8)) {
352 extern unsigned int maxcpus;
354 maxcpus = simple_strtoul(from + 8, NULL, 0);
358 /* "acpi=off" disables both ACPI table parsing and interpreter init */
359 if (fullarg(from,"acpi=off"))
362 if (fullarg(from, "acpi=force")) {
363 /* add later when we do DMI horrors: */
368 /* acpi=ht just means: do ACPI MADT parsing
369 at bootup, but don't enable the full ACPI interpreter */
370 if (fullarg(from, "acpi=ht")) {
375 else if (fullarg(from, "pci=noacpi"))
377 else if (fullarg(from, "acpi=noirq"))
380 else if (fullarg(from, "acpi_sci=edge"))
381 acpi_sci_flags.trigger = 1;
382 else if (fullarg(from, "acpi_sci=level"))
383 acpi_sci_flags.trigger = 3;
384 else if (fullarg(from, "acpi_sci=high"))
385 acpi_sci_flags.polarity = 1;
386 else if (fullarg(from, "acpi_sci=low"))
387 acpi_sci_flags.polarity = 3;
389 /* acpi=strict disables out-of-spec workarounds */
390 else if (fullarg(from, "acpi=strict")) {
393 #ifdef CONFIG_X86_IO_APIC
394 else if (fullarg(from, "acpi_skip_timer_override"))
395 acpi_skip_timer_override = 1;
400 if (fullarg(from, "disable_timer_pin_1"))
401 disable_timer_pin_1 = 1;
402 if (fullarg(from, "enable_timer_pin_1"))
403 disable_timer_pin_1 = -1;
405 if (fullarg(from, "nolapic") || fullarg(from, "disableapic")) {
406 clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
410 if (fullarg(from, "noapic"))
411 skip_ioapic_setup = 1;
413 if (fullarg(from,"apic")) {
414 skip_ioapic_setup = 0;
419 if (!memcmp(from, "mem=", 4))
420 parse_memopt(from+4, &from);
422 if (!memcmp(from, "memmap=", 7)) {
423 /* exactmap option is for used defined memory */
424 if (!memcmp(from+7, "exactmap", 8)) {
425 #ifdef CONFIG_CRASH_DUMP
426 /* If we are doing a crash dump, we
427 * still need to know the real mem
428 * size before original memory map is
431 saved_max_pfn = e820_end_of_ram();
439 parse_memmapopt(from+7, &from);
445 if (!memcmp(from, "numa=", 5))
449 if (!memcmp(from,"iommu=",6)) {
453 if (fullarg(from,"oops=panic"))
456 if (!memcmp(from, "noexec=", 7))
457 nonx_setup(from + 7);
460 /* crashkernel=size@addr specifies the location to reserve for
461 * a crash kernel. By reserving this memory we guarantee
462 * that linux never set's it up as a DMA target.
463 * Useful for holding code to do something appropriate
464 * after a kernel panic.
466 else if (!memcmp(from, "crashkernel=", 12)) {
467 unsigned long size, base;
468 size = memparse(from+12, &from);
470 base = memparse(from+1, &from);
471 /* FIXME: Do I want a sanity check
472 * to validate the memory range?
474 crashk_res.start = base;
475 crashk_res.end = base + size - 1;
480 #ifdef CONFIG_PROC_VMCORE
481 /* elfcorehdr= specifies the location of elf core header
482 * stored by the crashed kernel. This option will be passed
483 * by kexec loader to the capture kernel.
485 else if(!memcmp(from, "elfcorehdr=", 11))
486 elfcorehdr_addr = memparse(from+11, &from);
489 #if defined(CONFIG_HOTPLUG_CPU) && !defined(CONFIG_XEN)
490 else if (!memcmp(from, "additional_cpus=", 16))
491 setup_additional_cpus(from+16);
498 if (COMMAND_LINE_SIZE <= ++len)
503 printk(KERN_INFO "user-defined physical RAM map:\n");
504 e820_print_map("user");
507 *cmdline_p = command_line;
512 contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
514 unsigned long bootmap_size, bootmap;
516 bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
517 bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
519 panic("Cannot find bootmem map of size %ld\n",bootmap_size);
520 bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
522 e820_bootmem_free(NODE_DATA(0), 0, xen_start_info->nr_pages<<PAGE_SHIFT);
524 e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
526 reserve_bootmem(bootmap, bootmap_size);
530 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
532 #ifdef CONFIG_EDD_MODULE
536 * copy_edd() - Copy the BIOS EDD information
537 * from boot_params into a safe place.
540 static inline void copy_edd(void)
542 memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
543 memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
544 edd.mbr_signature_nr = EDD_MBR_SIG_NR;
545 edd.edd_info_nr = EDD_NR;
548 static inline void copy_edd(void)
554 #define EBDA_ADDR_POINTER 0x40E
556 unsigned __initdata ebda_addr;
557 unsigned __initdata ebda_size;
559 static void discover_ebda(void)
562 * there is a real-mode segmented pointer pointing to the
563 * 4K EBDA area at 0x40E
565 ebda_addr = *(unsigned short *)EBDA_ADDR_POINTER;
568 ebda_size = *(unsigned short *)(unsigned long)ebda_addr;
570 /* Round EBDA up to pages */
574 ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
575 if (ebda_size > 64*1024)
580 void __init setup_arch(char **cmdline_p)
582 struct xen_memory_map memmap;
585 /* Register a call for panic conditions. */
586 atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
588 ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
589 screen_info = SCREEN_INFO;
591 if (is_initial_xendomain()) {
592 /* This is drawn from a dump from vgacon:startup in
594 screen_info.orig_video_mode = 3;
595 screen_info.orig_video_isVGA = 1;
596 screen_info.orig_video_lines = 25;
597 screen_info.orig_video_cols = 80;
598 screen_info.orig_video_ega_bx = 3;
599 screen_info.orig_video_points = 16;
600 screen_info.orig_y = screen_info.orig_video_lines - 1;
601 if (xen_start_info->console.dom0.info_size >=
602 sizeof(struct dom0_vga_console_info)) {
603 const struct dom0_vga_console_info *info =
604 (struct dom0_vga_console_info *)(
605 (char *)xen_start_info +
606 xen_start_info->console.dom0.info_off);
607 dom0_init_screen_info(info);
609 xen_start_info->console.domU.mfn = 0;
610 xen_start_info->console.domU.evtchn = 0;
612 screen_info.orig_video_isVGA = 0;
614 edid_info = EDID_INFO;
615 saved_video_mode = SAVED_VIDEO_MODE;
616 bootloader_type = LOADER_TYPE;
618 #ifdef CONFIG_BLK_DEV_RAM
619 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
620 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
621 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
626 setup_xen_features();
628 HYPERVISOR_vm_assist(VMASST_CMD_enable,
629 VMASST_TYPE_writable_pagetables);
633 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
634 screen_info = SCREEN_INFO;
635 edid_info = EDID_INFO;
636 saved_video_mode = SAVED_VIDEO_MODE;
637 bootloader_type = LOADER_TYPE;
639 #ifdef CONFIG_BLK_DEV_RAM
640 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
641 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
642 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
644 #endif /* !CONFIG_XEN */
645 setup_memory_region();
648 if (!MOUNT_ROOT_RDONLY)
649 root_mountflags &= ~MS_RDONLY;
650 init_mm.start_code = (unsigned long) &_text;
651 init_mm.end_code = (unsigned long) &_etext;
652 init_mm.end_data = (unsigned long) &_edata;
653 init_mm.brk = (unsigned long) &_end;
655 code_resource.start = virt_to_phys(&_text);
656 code_resource.end = virt_to_phys(&_etext)-1;
657 data_resource.start = virt_to_phys(&_etext);
658 data_resource.end = virt_to_phys(&_edata)-1;
660 parse_cmdline_early(cmdline_p);
662 early_identify_cpu(&boot_cpu_data);
665 * partially used pages are not usable - thus
666 * we are rounding upwards:
668 end_pfn = e820_end_of_ram();
669 num_physpages = end_pfn; /* for pfn_valid */
677 init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
679 #ifdef CONFIG_ACPI_NUMA
681 * Parse SRAT to discover nodes.
687 numa_initmem_init(0, end_pfn);
689 contig_initmem_init(0, end_pfn);
692 /* Reserve direct mapping */
693 reserve_bootmem_generic(table_start << PAGE_SHIFT,
694 (table_end - table_start) << PAGE_SHIFT);
697 reserve_bootmem_generic(__pa_symbol(&_text),
698 __pa_symbol(&_end) - __pa_symbol(&_text));
701 /* reserve physmap, start info and initial page tables */
702 reserve_bootmem(__pa_symbol(&_end), (table_start<<PAGE_SHIFT)-__pa_symbol(&_end));
705 * reserve physical page 0 - it's a special BIOS page on many boxes,
706 * enabling clean reboots, SMP operation, laptop functions.
708 reserve_bootmem_generic(0, PAGE_SIZE);
710 /* reserve ebda region */
712 reserve_bootmem_generic(ebda_addr, ebda_size);
717 * But first pinch a few for the stack/trampoline stuff
718 * FIXME: Don't need the extra page at 4K, but need to fix
719 * trampoline before removing it. (see the GDT stuff)
721 reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
723 /* Reserve SMP trampoline */
724 reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
727 #ifdef CONFIG_ACPI_SLEEP
729 * Reserve low memory region for sleep support.
731 acpi_reserve_bootmem();
734 #ifdef CONFIG_BLK_DEV_INITRD
735 if (xen_start_info->mod_start) {
736 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
737 /*reserve_bootmem_generic(INITRD_START, INITRD_SIZE);*/
738 initrd_start = INITRD_START + PAGE_OFFSET;
739 initrd_end = initrd_start+INITRD_SIZE;
740 initrd_below_start_ok = 1;
742 printk(KERN_ERR "initrd extends beyond end of memory "
743 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
744 (unsigned long)(INITRD_START + INITRD_SIZE),
745 (unsigned long)(end_pfn << PAGE_SHIFT));
750 #else /* CONFIG_XEN */
751 #ifdef CONFIG_BLK_DEV_INITRD
752 if (LOADER_TYPE && INITRD_START) {
753 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
754 reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
756 INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
757 initrd_end = initrd_start+INITRD_SIZE;
760 printk(KERN_ERR "initrd extends beyond end of memory "
761 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
762 (unsigned long)(INITRD_START + INITRD_SIZE),
763 (unsigned long)(end_pfn << PAGE_SHIFT));
768 #endif /* !CONFIG_XEN */
770 if (crashk_res.start != crashk_res.end) {
771 reserve_bootmem_generic(crashk_res.start,
772 crashk_res.end - crashk_res.start + 1);
777 #ifdef CONFIG_X86_LOCAL_APIC
779 * Find and reserve possible boot-time SMP configuration:
787 if (!xen_feature(XENFEAT_auto_translated_physmap)) {
788 /* Make sure we have a large enough P->M table. */
789 phys_to_machine_mapping = alloc_bootmem_pages(
790 end_pfn * sizeof(unsigned long));
791 memset(phys_to_machine_mapping, ~0,
792 end_pfn * sizeof(unsigned long));
793 memcpy(phys_to_machine_mapping,
794 (unsigned long *)xen_start_info->mfn_list,
795 xen_start_info->nr_pages * sizeof(unsigned long));
797 __pa(xen_start_info->mfn_list),
798 PFN_PHYS(PFN_UP(xen_start_info->nr_pages *
799 sizeof(unsigned long))));
802 * Initialise the list of the frames that specify the
803 * list of frames that make up the p2m table. Used by
806 pfn_to_mfn_frame_list_list = alloc_bootmem_pages(PAGE_SIZE);
807 HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
808 virt_to_mfn(pfn_to_mfn_frame_list_list);
810 fpp = PAGE_SIZE/sizeof(unsigned long);
811 for (i=0, j=0, k=-1; i< end_pfn; i+=fpp, j++) {
812 if ((j % fpp) == 0) {
815 pfn_to_mfn_frame_list[k] =
816 alloc_bootmem_pages(PAGE_SIZE);
817 pfn_to_mfn_frame_list_list[k] =
818 virt_to_mfn(pfn_to_mfn_frame_list[k]);
821 pfn_to_mfn_frame_list[k][j] =
822 virt_to_mfn(&phys_to_machine_mapping[i]);
824 HYPERVISOR_shared_info->arch.max_pfn = end_pfn;
829 if (is_initial_xendomain())
832 if (!is_initial_xendomain()) {
847 * set this early, so we dont allocate cpu0
848 * if MADT list doesnt list BSP first
849 * mpparse.c/MP_processor_info() allocates logical cpu numbers.
851 cpu_set(0, cpu_present_map);
854 * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
855 * Call this early for SRAT node setup.
857 acpi_boot_table_init();
860 * Read APIC and some other early information from ACPI tables.
867 #ifdef CONFIG_X86_LOCAL_APIC
869 * get boot-time SMP configuration:
871 if (smp_found_config)
874 init_apic_mappings();
877 #if defined(CONFIG_XEN) && defined(CONFIG_SMP) && !defined(CONFIG_HOTPLUG_CPU)
878 prefill_possible_map();
882 * Request address space for all standard RAM and ROM resources
883 * and also for regions reported as reserved by the e820.
887 if (is_initial_xendomain()) {
888 memmap.nr_entries = E820MAX;
889 set_xen_guest_handle(memmap.buffer, machine_e820.map);
891 if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
893 machine_e820.nr_map = memmap.nr_entries;
895 e820_reserve_resources(machine_e820.map, machine_e820.nr_map);
898 e820_reserve_resources(e820.map, e820.nr_map);
901 request_resource(&iomem_resource, &video_ram_resource);
905 /* request I/O space for devices used on all i[345]86 PCs */
906 for (i = 0; i < STANDARD_IO_RESOURCES; i++)
907 request_resource(&ioport_resource, &standard_io_resources[i]);
911 if (is_initial_xendomain())
912 e820_setup_gap(machine_e820.map, machine_e820.nr_map);
914 e820_setup_gap(e820.map, e820.nr_map);
919 struct physdev_set_iopl set_iopl;
922 HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);
924 if (is_initial_xendomain()) {
926 #if defined(CONFIG_VGA_CONSOLE)
927 conswitchp = &vga_con;
928 #elif defined(CONFIG_DUMMY_CONSOLE)
929 conswitchp = &dummy_con;
933 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
934 conswitchp = &dummy_con;
938 #else /* CONFIG_XEN */
941 #if defined(CONFIG_VGA_CONSOLE)
942 conswitchp = &vga_con;
943 #elif defined(CONFIG_DUMMY_CONSOLE)
944 conswitchp = &dummy_con;
948 #endif /* !CONFIG_XEN */
953 xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
955 HYPERVISOR_shutdown(SHUTDOWN_crash);
956 /* we're never actually going to get here... */
959 #endif /* !CONFIG_XEN */
962 static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
966 if (c->extended_cpuid_level < 0x80000004)
969 v = (unsigned int *) c->x86_model_id;
970 cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
971 cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
972 cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
973 c->x86_model_id[48] = 0;
978 static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
980 unsigned int n, dummy, eax, ebx, ecx, edx;
982 n = c->extended_cpuid_level;
984 if (n >= 0x80000005) {
985 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
986 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
987 edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
988 c->x86_cache_size=(ecx>>24)+(edx>>24);
989 /* On K8 L1 TLB is inclusive, so don't count it */
993 if (n >= 0x80000006) {
994 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
995 ecx = cpuid_ecx(0x80000006);
996 c->x86_cache_size = ecx >> 16;
997 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
999 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
1000 c->x86_cache_size, ecx & 0xFF);
1003 if (n >= 0x80000007)
1004 cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
1005 if (n >= 0x80000008) {
1006 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
1007 c->x86_virt_bits = (eax >> 8) & 0xff;
1008 c->x86_phys_bits = eax & 0xff;
1013 static int nearby_node(int apicid)
1016 for (i = apicid - 1; i >= 0; i--) {
1017 int node = apicid_to_node[i];
1018 if (node != NUMA_NO_NODE && node_online(node))
1021 for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
1022 int node = apicid_to_node[i];
1023 if (node != NUMA_NO_NODE && node_online(node))
1026 return first_node(node_online_map); /* Shouldn't happen */
1031 * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
1032 * Assumes number of cores is a power of two.
1034 static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
1039 int cpu = smp_processor_id();
1041 unsigned apicid = hard_smp_processor_id();
1043 unsigned ecx = cpuid_ecx(0x80000008);
1045 c->x86_max_cores = (ecx & 0xff) + 1;
1047 /* CPU telling us the core id bits shift? */
1048 bits = (ecx >> 12) & 0xF;
1050 /* Otherwise recompute */
1052 while ((1 << bits) < c->x86_max_cores)
1056 /* Low order bits define the core id (index of core in socket) */
1057 c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1);
1058 /* Convert the APIC ID into the socket ID */
1059 c->phys_proc_id = phys_pkg_id(bits);
1062 node = c->phys_proc_id;
1063 if (apicid_to_node[apicid] != NUMA_NO_NODE)
1064 node = apicid_to_node[apicid];
1065 if (!node_online(node)) {
1066 /* Two possibilities here:
1067 - The CPU is missing memory and no node was created.
1068 In that case try picking one from a nearby CPU
1069 - The APIC IDs differ from the HyperTransport node IDs
1070 which the K8 northbridge parsing fills in.
1071 Assume they are all increased by a constant offset,
1072 but in the same order as the HT nodeids.
1073 If that doesn't result in a usable node fall back to the
1074 path for the previous case. */
1075 int ht_nodeid = apicid - (cpu_data[0].phys_proc_id << bits);
1076 if (ht_nodeid >= 0 &&
1077 apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
1078 node = apicid_to_node[ht_nodeid];
1079 /* Pick a nearby node */
1080 if (!node_online(node))
1081 node = nearby_node(apicid);
1083 numa_set_node(cpu, node);
1085 printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
1090 static void __init init_amd(struct cpuinfo_x86 *c)
1095 unsigned long value;
1098 * Disable TLB flush filter by setting HWCR.FFDIS on K8
1099 * bit 6 of msr C001_0015
1101 * Errata 63 for SH-B3 steppings
1102 * Errata 122 for all steppings (F+ have it disabled by default)
1105 rdmsrl(MSR_K8_HWCR, value);
1107 wrmsrl(MSR_K8_HWCR, value);
1111 /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
1112 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
1113 clear_bit(0*32+31, &c->x86_capability);
1115 /* On C+ stepping K8 rep microcode works well for copy/memset */
1116 level = cpuid_eax(1);
1117 if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
1118 set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
1120 /* Enable workaround for FXSAVE leak */
1122 set_bit(X86_FEATURE_FXSAVE_LEAK, &c->x86_capability);
1124 level = get_model_name(c);
1128 /* Should distinguish Models here, but this is only
1129 a fallback anyways. */
1130 strcpy(c->x86_model_id, "Hammer");
1134 display_cacheinfo(c);
1136 /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
1137 if (c->x86_power & (1<<8))
1138 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
1140 /* Multi core CPU? */
1141 if (c->extended_cpuid_level >= 0x80000008)
1144 /* Fix cpuid4 emulation for more */
1145 num_cache_leaves = 3;
1148 static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
1151 u32 eax, ebx, ecx, edx;
1152 int index_msb, core_bits;
1153 int cpu = smp_processor_id();
1155 cpuid(1, &eax, &ebx, &ecx, &edx);
1158 if (!cpu_has(c, X86_FEATURE_HT))
1160 if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
1163 smp_num_siblings = (ebx & 0xff0000) >> 16;
1165 if (smp_num_siblings == 1) {
1166 printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
1167 } else if (smp_num_siblings > 1 ) {
1169 if (smp_num_siblings > NR_CPUS) {
1170 printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
1171 smp_num_siblings = 1;
1175 index_msb = get_count_order(smp_num_siblings);
1176 c->phys_proc_id = phys_pkg_id(index_msb);
1178 smp_num_siblings = smp_num_siblings / c->x86_max_cores;
1180 index_msb = get_count_order(smp_num_siblings) ;
1182 core_bits = get_count_order(c->x86_max_cores);
1184 c->cpu_core_id = phys_pkg_id(index_msb) &
1185 ((1 << core_bits) - 1);
1188 if ((c->x86_max_cores * smp_num_siblings) > 1) {
1189 printk(KERN_INFO "CPU: Physical Processor ID: %d\n", c->phys_proc_id);
1190 printk(KERN_INFO "CPU: Processor Core ID: %d\n", c->cpu_core_id);
1196 * find out the number of processor cores on the die
1198 static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
1200 unsigned int eax, t;
1202 if (c->cpuid_level < 4)
1205 cpuid_count(4, 0, &eax, &t, &t, &t);
1208 return ((eax >> 26) + 1);
1213 static void srat_detect_node(void)
1217 int cpu = smp_processor_id();
1218 int apicid = hard_smp_processor_id();
1220 /* Don't do the funky fallback heuristics the AMD version employs
1222 node = apicid_to_node[apicid];
1223 if (node == NUMA_NO_NODE)
1224 node = first_node(node_online_map);
1225 numa_set_node(cpu, node);
1228 printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
1232 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
1237 init_intel_cacheinfo(c);
1238 if (c->cpuid_level > 9 ) {
1239 unsigned eax = cpuid_eax(10);
1240 /* Check for version and the number of counters */
1241 if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
1242 set_bit(X86_FEATURE_ARCH_PERFMON, &c->x86_capability);
1245 n = c->extended_cpuid_level;
1246 if (n >= 0x80000008) {
1247 unsigned eax = cpuid_eax(0x80000008);
1248 c->x86_virt_bits = (eax >> 8) & 0xff;
1249 c->x86_phys_bits = eax & 0xff;
1250 /* CPUID workaround for Intel 0F34 CPU */
1251 if (c->x86_vendor == X86_VENDOR_INTEL &&
1252 c->x86 == 0xF && c->x86_model == 0x3 &&
1254 c->x86_phys_bits = 36;
1258 c->x86_cache_alignment = c->x86_clflush_size * 2;
1259 if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
1260 (c->x86 == 0x6 && c->x86_model >= 0x0e))
1261 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
1262 set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
1263 c->x86_max_cores = intel_num_cpu_cores(c);
1268 static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
1270 char *v = c->x86_vendor_id;
1272 if (!strcmp(v, "AuthenticAMD"))
1273 c->x86_vendor = X86_VENDOR_AMD;
1274 else if (!strcmp(v, "GenuineIntel"))
1275 c->x86_vendor = X86_VENDOR_INTEL;
1277 c->x86_vendor = X86_VENDOR_UNKNOWN;
1280 struct cpu_model_info {
1283 char *model_names[16];
1286 /* Do some early cpuid on the boot CPU to get some parameter that are
1287 needed before check_bugs. Everything advanced is in identify_cpu
1289 void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
1293 c->loops_per_jiffy = loops_per_jiffy;
1294 c->x86_cache_size = -1;
1295 c->x86_vendor = X86_VENDOR_UNKNOWN;
1296 c->x86_model = c->x86_mask = 0; /* So far unknown... */
1297 c->x86_vendor_id[0] = '\0'; /* Unset */
1298 c->x86_model_id[0] = '\0'; /* Unset */
1299 c->x86_clflush_size = 64;
1300 c->x86_cache_alignment = c->x86_clflush_size;
1301 c->x86_max_cores = 1;
1302 c->extended_cpuid_level = 0;
1303 memset(&c->x86_capability, 0, sizeof c->x86_capability);
1305 /* Get vendor name */
1306 cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
1307 (unsigned int *)&c->x86_vendor_id[0],
1308 (unsigned int *)&c->x86_vendor_id[8],
1309 (unsigned int *)&c->x86_vendor_id[4]);
1313 /* Initialize the standard set of capabilities */
1314 /* Note that the vendor-specific code below might override */
1316 /* Intel-defined flags: level 0x00000001 */
1317 if (c->cpuid_level >= 0x00000001) {
1319 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
1320 &c->x86_capability[0]);
1321 c->x86 = (tfms >> 8) & 0xf;
1322 c->x86_model = (tfms >> 4) & 0xf;
1323 c->x86_mask = tfms & 0xf;
1325 c->x86 += (tfms >> 20) & 0xff;
1327 c->x86_model += ((tfms >> 16) & 0xF) << 4;
1328 if (c->x86_capability[0] & (1<<19))
1329 c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
1331 /* Have CPUID level 0 only - unheard of */
1336 c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
1341 * This does the hard work of actually picking apart the CPU stuff...
1343 void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
1348 early_identify_cpu(c);
1350 /* AMD-defined flags: level 0x80000001 */
1351 xlvl = cpuid_eax(0x80000000);
1352 c->extended_cpuid_level = xlvl;
1353 if ((xlvl & 0xffff0000) == 0x80000000) {
1354 if (xlvl >= 0x80000001) {
1355 c->x86_capability[1] = cpuid_edx(0x80000001);
1356 c->x86_capability[6] = cpuid_ecx(0x80000001);
1358 if (xlvl >= 0x80000004)
1359 get_model_name(c); /* Default name */
1362 /* Transmeta-defined flags: level 0x80860001 */
1363 xlvl = cpuid_eax(0x80860000);
1364 if ((xlvl & 0xffff0000) == 0x80860000) {
1365 /* Don't set x86_cpuid_level here for now to not confuse. */
1366 if (xlvl >= 0x80860001)
1367 c->x86_capability[2] = cpuid_edx(0x80860001);
1370 c->apicid = phys_pkg_id(0);
1373 * Vendor-specific initialization. In this section we
1374 * canonicalize the feature flags, meaning if there are
1375 * features a certain CPU supports which CPUID doesn't
1376 * tell us, CPUID claiming incorrect flags, or other bugs,
1377 * we handle them here.
1379 * At the end of this section, c->x86_capability better
1380 * indicate the features this CPU genuinely supports!
1382 switch (c->x86_vendor) {
1383 case X86_VENDOR_AMD:
1387 case X86_VENDOR_INTEL:
1391 case X86_VENDOR_UNKNOWN:
1393 display_cacheinfo(c);
1397 select_idle_routine(c);
1401 * On SMP, boot_cpu_data holds the common feature set between
1402 * all CPUs; so make sure that we indicate which features are
1403 * common between the CPUs. The first time this routine gets
1404 * executed, c == &boot_cpu_data.
1406 if (c != &boot_cpu_data) {
1407 /* AND the already accumulated flags with these */
1408 for (i = 0 ; i < NCAPINTS ; i++)
1409 boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1412 #ifdef CONFIG_X86_MCE
1415 if (c == &boot_cpu_data)
1420 numa_add_cpu(smp_processor_id());
1425 void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
1427 if (c->x86_model_id[0])
1428 printk("%s", c->x86_model_id);
1430 if (c->x86_mask || c->cpuid_level >= 0)
1431 printk(" stepping %02x\n", c->x86_mask);
1437 * Get CPU information for use by the procfs.
1440 static int show_cpuinfo(struct seq_file *m, void *v)
1442 struct cpuinfo_x86 *c = v;
1445 * These flag bits must match the definitions in <asm/cpufeature.h>.
1446 * NULL means this bit is undefined or reserved; either way it doesn't
1447 * have meaning as far as Linux is concerned. Note that it's important
1448 * to realize there is a difference between this table and CPUID -- if
1449 * applications want to get the raw CPUID data, they should access
1450 * /dev/cpu/<cpu_nr>/cpuid instead.
1452 static char *x86_cap_flags[] = {
1454 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
1455 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
1456 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1457 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
1460 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1461 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
1462 NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
1463 NULL, "fxsr_opt", NULL, "rdtscp", NULL, "lm", "3dnowext", "3dnow",
1465 /* Transmeta-defined */
1466 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
1467 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1468 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1469 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1471 /* Other (Linux-defined) */
1472 "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
1473 "constant_tsc", NULL, NULL,
1474 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1475 "up", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1476 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1478 /* Intel-defined (#2) */
1479 "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
1480 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
1481 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1482 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1484 /* VIA/Cyrix/Centaur-defined */
1485 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1486 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1487 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1488 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1490 /* AMD-defined (#2) */
1491 "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL,
1492 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1493 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1494 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1496 static char *x86_power_flags[] = {
1497 "ts", /* temperature sensor */
1498 "fid", /* frequency id control */
1499 "vid", /* voltage id control */
1500 "ttp", /* thermal trip */
1504 /* nothing */ /* constant_tsc - moved to flags */
1509 if (!cpu_online(c-cpu_data))
1513 seq_printf(m,"processor\t: %u\n"
1515 "cpu family\t: %d\n"
1517 "model name\t: %s\n",
1518 (unsigned)(c-cpu_data),
1519 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
1522 c->x86_model_id[0] ? c->x86_model_id : "unknown");
1524 if (c->x86_mask || c->cpuid_level >= 0)
1525 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
1527 seq_printf(m, "stepping\t: unknown\n");
1529 if (cpu_has(c,X86_FEATURE_TSC)) {
1530 unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data));
1533 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
1534 freq / 1000, (freq % 1000));
1538 if (c->x86_cache_size >= 0)
1539 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
1542 if (smp_num_siblings * c->x86_max_cores > 1) {
1543 int cpu = c - cpu_data;
1544 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
1545 seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu]));
1546 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
1547 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
1553 "fpu_exception\t: yes\n"
1554 "cpuid level\t: %d\n"
1561 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
1562 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
1563 seq_printf(m, " %s", x86_cap_flags[i]);
1566 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
1567 c->loops_per_jiffy/(500000/HZ),
1568 (c->loops_per_jiffy/(5000/HZ)) % 100);
1570 if (c->x86_tlbsize > 0)
1571 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
1572 seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
1573 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
1575 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
1576 c->x86_phys_bits, c->x86_virt_bits);
1578 seq_printf(m, "power management:");
1581 for (i = 0; i < 32; i++)
1582 if (c->x86_power & (1 << i)) {
1583 if (i < ARRAY_SIZE(x86_power_flags) &&
1585 seq_printf(m, "%s%s",
1586 x86_power_flags[i][0]?" ":"",
1587 x86_power_flags[i]);
1589 seq_printf(m, " [%d]", i);
1593 seq_printf(m, "\n\n");
1598 static void *c_start(struct seq_file *m, loff_t *pos)
1600 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
1603 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1606 return c_start(m, pos);
1609 static void c_stop(struct seq_file *m, void *v)
1613 struct seq_operations cpuinfo_op = {
1617 .show = show_cpuinfo,
1620 #if defined(CONFIG_INPUT_PCSPKR) || defined(CONFIG_INPUT_PCSPKR_MODULE)
1621 #include <linux/platform_device.h>
1622 static __init int add_pcspkr(void)
1624 struct platform_device *pd;
1627 pd = platform_device_alloc("pcspkr", -1);
1631 ret = platform_device_add(pd);
1633 platform_device_put(pd);
1637 device_initcall(add_pcspkr);