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setup-xen.c

/*
 *  linux/arch/x86-64/kernel/setup.c
 *
 *  Copyright (C) 1995  Linus Torvalds
 *
 *  Nov 2001 Dave Jones <davej@suse.de>
 *  Forked from i386 setup code.
 */

/*
 * This file handles the architecture-dependent parts of initialization
 */

#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/screen_info.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/initrd.h>
#include <linux/highmem.h>
#include <linux/bootmem.h>
#include <linux/module.h>
#include <asm/processor.h>
#include <linux/console.h>
#include <linux/seq_file.h>
#include <linux/crash_dump.h>
#include <linux/root_dev.h>
#include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/kallsyms.h>
#include <linux/edd.h>
#include <linux/mmzone.h>
#include <linux/kexec.h>
#include <linux/cpufreq.h>
#include <linux/dmi.h>
#include <linux/dma-mapping.h>
#include <linux/ctype.h>

#include <asm/mtrr.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/smp.h>
#include <asm/msr.h>
#include <asm/desc.h>
#include <video/edid.h>
#include <asm/e820.h>
#include <asm/dma.h>
#include <asm/mpspec.h>
#include <asm/mmu_context.h>
#include <asm/bootsetup.h>
#include <asm/proto.h>
#include <asm/setup.h>
#include <asm/mach_apic.h>
#include <asm/numa.h>
#include <asm/sections.h>
#include <asm/dmi.h>
#ifdef CONFIG_XEN
#include <linux/percpu.h>
#include <xen/interface/physdev.h>
#include "setup_arch_pre.h"
#include <asm/hypervisor.h>
#include <xen/interface/nmi.h>
#include <xen/features.h>
#include <xen/xencons.h>
#define PFN_UP(x)       (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
#define PFN_PHYS(x)     ((x) << PAGE_SHIFT)
#include <asm/mach-xen/setup_arch_post.h>
#include <xen/interface/memory.h>

#ifdef CONFIG_XEN
#include <xen/interface/kexec.h>
#endif

extern unsigned long start_pfn;
extern struct edid_info edid_info;

shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
EXPORT_SYMBOL(HYPERVISOR_shared_info);

extern char hypercall_page[PAGE_SIZE];
EXPORT_SYMBOL(hypercall_page);

static int xen_panic_event(struct notifier_block *, unsigned long, void *);
static struct notifier_block xen_panic_block = {
      xen_panic_event, NULL, 0 /* try to go last */
};

unsigned long *phys_to_machine_mapping;
unsigned long *pfn_to_mfn_frame_list_list, *pfn_to_mfn_frame_list[512];

EXPORT_SYMBOL(phys_to_machine_mapping);

DEFINE_PER_CPU(multicall_entry_t, multicall_list[8]);
DEFINE_PER_CPU(int, nr_multicall_ents);

/* Raw start-of-day parameters from the hypervisor. */
start_info_t *xen_start_info;
EXPORT_SYMBOL(xen_start_info);
#endif

/*
 * Machine setup..
 */

struct cpuinfo_x86 boot_cpu_data __read_mostly;
EXPORT_SYMBOL(boot_cpu_data);

unsigned long mmu_cr4_features;

int acpi_disabled;
EXPORT_SYMBOL(acpi_disabled);
#ifdef      CONFIG_ACPI
extern int __initdata acpi_ht;
extern acpi_interrupt_flags   acpi_sci_flags;
int __initdata acpi_force = 0;
#endif

int acpi_numa __initdata;

/* Boot loader ID as an integer, for the benefit of proc_dointvec */
int bootloader_type;

unsigned long saved_video_mode;

/* 
 * Early DMI memory
 */
int dmi_alloc_index;
char dmi_alloc_data[DMI_MAX_DATA];

/*
 * Setup options
 */
struct screen_info screen_info;
EXPORT_SYMBOL(screen_info);
struct sys_desc_table_struct {
      unsigned short length;
      unsigned char table[0];
};

struct edid_info edid_info;
EXPORT_SYMBOL_GPL(edid_info);
struct e820map e820;
#ifdef CONFIG_XEN
struct e820map machine_e820;
#endif

extern int root_mountflags;

char command_line[COMMAND_LINE_SIZE];

struct resource standard_io_resources[] = {
      { .name = "dma1", .start = 0x00, .end = 0x1f,
            .flags = IORESOURCE_BUSY | IORESOURCE_IO },
      { .name = "pic1", .start = 0x20, .end = 0x21,
            .flags = IORESOURCE_BUSY | IORESOURCE_IO },
      { .name = "timer0", .start = 0x40, .end = 0x43,
            .flags = IORESOURCE_BUSY | IORESOURCE_IO },
      { .name = "timer1", .start = 0x50, .end = 0x53,
            .flags = IORESOURCE_BUSY | IORESOURCE_IO },
      { .name = "keyboard", .start = 0x60, .end = 0x6f,
            .flags = IORESOURCE_BUSY | IORESOURCE_IO },
      { .name = "dma page reg", .start = 0x80, .end = 0x8f,
            .flags = IORESOURCE_BUSY | IORESOURCE_IO },
      { .name = "pic2", .start = 0xa0, .end = 0xa1,
            .flags = IORESOURCE_BUSY | IORESOURCE_IO },
      { .name = "dma2", .start = 0xc0, .end = 0xdf,
            .flags = IORESOURCE_BUSY | IORESOURCE_IO },
      { .name = "fpu", .start = 0xf0, .end = 0xff,
            .flags = IORESOURCE_BUSY | IORESOURCE_IO }
};

#define STANDARD_IO_RESOURCES \
      (sizeof standard_io_resources / sizeof standard_io_resources[0])

#define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)

struct resource data_resource = {
      .name = "Kernel data",
      .start = 0,
      .end = 0,
      .flags = IORESOURCE_RAM,
};
struct resource code_resource = {
      .name = "Kernel code",
      .start = 0,
      .end = 0,
      .flags = IORESOURCE_RAM,
};

#define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)

static struct resource system_rom_resource = {
      .name = "System ROM",
      .start = 0xf0000,
      .end = 0xfffff,
      .flags = IORESOURCE_ROM,
};

static struct resource extension_rom_resource = {
      .name = "Extension ROM",
      .start = 0xe0000,
      .end = 0xeffff,
      .flags = IORESOURCE_ROM,
};

static struct resource adapter_rom_resources[] = {
      { .name = "Adapter ROM", .start = 0xc8000, .end = 0,
            .flags = IORESOURCE_ROM },
      { .name = "Adapter ROM", .start = 0, .end = 0,
            .flags = IORESOURCE_ROM },
      { .name = "Adapter ROM", .start = 0, .end = 0,
            .flags = IORESOURCE_ROM },
      { .name = "Adapter ROM", .start = 0, .end = 0,
            .flags = IORESOURCE_ROM },
      { .name = "Adapter ROM", .start = 0, .end = 0,
            .flags = IORESOURCE_ROM },
      { .name = "Adapter ROM", .start = 0, .end = 0,
            .flags = IORESOURCE_ROM }
};

#define ADAPTER_ROM_RESOURCES \
      (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])

static struct resource video_rom_resource = {
      .name = "Video ROM",
      .start = 0xc0000,
      .end = 0xc7fff,
      .flags = IORESOURCE_ROM,
};

static struct resource video_ram_resource = {
      .name = "Video RAM area",
      .start = 0xa0000,
      .end = 0xbffff,
      .flags = IORESOURCE_RAM,
};

#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)

static int __init romchecksum(unsigned char *rom, unsigned long length)
{
      unsigned char *p, sum = 0;

      for (p = rom; p < rom + length; p++)
            sum += *p;
      return sum == 0;
}

static void __init probe_roms(void)
{
      unsigned long start, length, upper;
      unsigned char *rom;
      int         i;

#ifdef CONFIG_XEN
      /* Nothing to do if not running in dom0. */
      if (!is_initial_xendomain())
            return;
#endif

      /* video rom */
      upper = adapter_rom_resources[0].start;
      for (start = video_rom_resource.start; start < upper; start += 2048) {
            rom = isa_bus_to_virt(start);
            if (!romsignature(rom))
                  continue;

            video_rom_resource.start = start;

            /* 0 < length <= 0x7f * 512, historically */
            length = rom[2] * 512;

            /* if checksum okay, trust length byte */
            if (length && romchecksum(rom, length))
                  video_rom_resource.end = start + length - 1;

            request_resource(&iomem_resource, &video_rom_resource);
            break;
                  }

      start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
      if (start < upper)
            start = upper;

      /* system rom */
      request_resource(&iomem_resource, &system_rom_resource);
      upper = system_rom_resource.start;

      /* check for extension rom (ignore length byte!) */
      rom = isa_bus_to_virt(extension_rom_resource.start);
      if (romsignature(rom)) {
            length = extension_rom_resource.end - extension_rom_resource.start + 1;
            if (romchecksum(rom, length)) {
                  request_resource(&iomem_resource, &extension_rom_resource);
                  upper = extension_rom_resource.start;
            }
      }

      /* check for adapter roms on 2k boundaries */
      for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
            rom = isa_bus_to_virt(start);
            if (!romsignature(rom))
                  continue;

            /* 0 < length <= 0x7f * 512, historically */
            length = rom[2] * 512;

            /* but accept any length that fits if checksum okay */
            if (!length || start + length > upper || !romchecksum(rom, length))
                  continue;

            adapter_rom_resources[i].start = start;
            adapter_rom_resources[i].end = start + length - 1;
            request_resource(&iomem_resource, &adapter_rom_resources[i]);

            start = adapter_rom_resources[i++].end & ~2047UL;
      }
}

/* Check for full argument with no trailing characters */
static int fullarg(char *p, char *arg)
{
      int l = strlen(arg);
      return !memcmp(p, arg, l) && (p[l] == 0 || isspace(p[l]));
}

static __init void parse_cmdline_early (char ** cmdline_p)
{
      char c = ' ', *to = command_line, *from = COMMAND_LINE;
      int len = 0;
      int userdef = 0;

      for (;;) {
            if (c != ' ') 
                  goto next_char; 

#ifdef  CONFIG_SMP
            /*
             * If the BIOS enumerates physical processors before logical,
             * maxcpus=N at enumeration-time can be used to disable HT.
             */
            else if (!memcmp(from, "maxcpus=", 8)) {
                  extern unsigned int maxcpus;

                  maxcpus = simple_strtoul(from + 8, NULL, 0);
            }
#endif
#ifdef CONFIG_ACPI
            /* "acpi=off" disables both ACPI table parsing and interpreter init */
            if (fullarg(from,"acpi=off"))
                  disable_acpi();

            if (fullarg(from, "acpi=force")) { 
                  /* add later when we do DMI horrors: */
                  acpi_force = 1;
                  acpi_disabled = 0;
            }

            /* acpi=ht just means: do ACPI MADT parsing 
               at bootup, but don't enable the full ACPI interpreter */
            if (fullarg(from, "acpi=ht")) { 
                  if (!acpi_force)
                        disable_acpi();
                  acpi_ht = 1; 
            }
                else if (fullarg(from, "pci=noacpi")) 
                  acpi_disable_pci();
            else if (fullarg(from, "acpi=noirq"))
                  acpi_noirq_set();

            else if (fullarg(from, "acpi_sci=edge"))
                  acpi_sci_flags.trigger =  1;
            else if (fullarg(from, "acpi_sci=level"))
                  acpi_sci_flags.trigger = 3;
            else if (fullarg(from, "acpi_sci=high"))
                  acpi_sci_flags.polarity = 1;
            else if (fullarg(from, "acpi_sci=low"))
                  acpi_sci_flags.polarity = 3;

            /* acpi=strict disables out-of-spec workarounds */
            else if (fullarg(from, "acpi=strict")) {
                  acpi_strict = 1;
            }
#ifdef CONFIG_X86_IO_APIC
            else if (fullarg(from, "acpi_skip_timer_override"))
                  acpi_skip_timer_override = 1;
#endif
#endif

#ifndef CONFIG_XEN
            if (fullarg(from, "nolapic") || fullarg(from, "disableapic")) {
                  clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
                  disable_apic = 1;
            }

            if (fullarg(from, "noapic"))
                  skip_ioapic_setup = 1;

            if (fullarg(from,"apic")) {
                  skip_ioapic_setup = 0;
                  ioapic_force = 1;
            }
#endif
                  
            if (!memcmp(from, "mem=", 4))
                  parse_memopt(from+4, &from); 

            if (!memcmp(from, "memmap=", 7)) {
                  /* exactmap option is for used defined memory */
                  if (!memcmp(from+7, "exactmap", 8)) {
#ifdef CONFIG_CRASH_DUMP
                        /* If we are doing a crash dump, we
                         * still need to know the real mem
                         * size before original memory map is
                         * reset.
                         */
                        saved_max_pfn = e820_end_of_ram();
#endif
                        from += 8+7;
                        end_pfn_map = 0;
                        e820.nr_map = 0;
                        userdef = 1;
                  }
                  else {
                        parse_memmapopt(from+7, &from);
                        userdef = 1;
                  }
            }

#ifdef CONFIG_NUMA
            if (!memcmp(from, "numa=", 5))
                  numa_setup(from+5); 
#endif

            if (!memcmp(from,"iommu=",6)) { 
                  iommu_setup(from+6); 
            }

            if (fullarg(from,"oops=panic"))
                  panic_on_oops = 1;

            if (!memcmp(from, "noexec=", 7))
                  nonx_setup(from + 7);

#ifdef CONFIG_KEXEC
            /* crashkernel=size@addr specifies the location to reserve for
             * a crash kernel.  By reserving this memory we guarantee
             * that linux never set's it up as a DMA target.
             * Useful for holding code to do something appropriate
             * after a kernel panic.
             */
            else if (!memcmp(from, "crashkernel=", 12)) {
#ifndef CONFIG_XEN
                  unsigned long size, base;
                  size = memparse(from+12, &from);
                  if (*from == '@') {
                        base = memparse(from+1, &from);
                        /* FIXME: Do I want a sanity check
                         * to validate the memory range?
                         */
                        crashk_res.start = base;
                        crashk_res.end   = base + size - 1;
                  }
#else
                  printk("Ignoring crashkernel command line, "
                         "parameter will be supplied by xen\n");
#endif
            }
#endif

#ifdef CONFIG_PROC_VMCORE
            /* elfcorehdr= specifies the location of elf core header
             * stored by the crashed kernel. This option will be passed
             * by kexec loader to the capture kernel.
             */
            else if(!memcmp(from, "elfcorehdr=", 11))
                  elfcorehdr_addr = memparse(from+11, &from);
#endif

#if defined(CONFIG_HOTPLUG_CPU) && !defined(CONFIG_XEN)
            else if (!memcmp(from, "additional_cpus=", 16))
                  setup_additional_cpus(from+16);
#endif

      next_char:
            c = *(from++);
            if (!c)
                  break;
            if (COMMAND_LINE_SIZE <= ++len)
                  break;
            *(to++) = c;
      }
      if (userdef) {
            printk(KERN_INFO "user-defined physical RAM map:\n");
            e820_print_map("user");
      }
      *to = '\0';
      *cmdline_p = command_line;
}

#ifndef CONFIG_NUMA
static void __init
contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
{
      unsigned long bootmap_size, bootmap;

      bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
      bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
      if (bootmap == -1L)
            panic("Cannot find bootmem map of size %ld\n",bootmap_size);
      bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
#ifdef CONFIG_XEN
      e820_bootmem_free(NODE_DATA(0), 0, xen_start_info->nr_pages<<PAGE_SHIFT);
#else
      e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
#endif
      reserve_bootmem(bootmap, bootmap_size);
} 
#endif

#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
struct edd edd;
#ifdef CONFIG_EDD_MODULE
EXPORT_SYMBOL(edd);
#endif
/**
 * copy_edd() - Copy the BIOS EDD information
 *              from boot_params into a safe place.
 *
 */
static inline void copy_edd(void)
{
     memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
     memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
     edd.mbr_signature_nr = EDD_MBR_SIG_NR;
     edd.edd_info_nr = EDD_NR;
}
#else
static inline void copy_edd(void)
{
}
#endif

#ifndef CONFIG_XEN
#define EBDA_ADDR_POINTER 0x40E

unsigned __initdata ebda_addr;
unsigned __initdata ebda_size;

static void discover_ebda(void)
{
      /*
       * there is a real-mode segmented pointer pointing to the 
       * 4K EBDA area at 0x40E
       */
      ebda_addr = *(unsigned short *)EBDA_ADDR_POINTER;
      ebda_addr <<= 4;

      ebda_size = *(unsigned short *)(unsigned long)ebda_addr;

      /* Round EBDA up to pages */
      if (ebda_size == 0)
            ebda_size = 1;
      ebda_size <<= 10;
      ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
      if (ebda_size > 64*1024)
            ebda_size = 64*1024;
}
#else
#define discover_ebda() ((void)0)
#endif

void __init setup_arch(char **cmdline_p)
{
#ifdef CONFIG_XEN
      /* Register a call for panic conditions. */
      atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);

      ROOT_DEV = MKDEV(RAMDISK_MAJOR,0); 
      screen_info = SCREEN_INFO;

      if (is_initial_xendomain()) {
            /* This is drawn from a dump from vgacon:startup in
             * standard Linux. */
            screen_info.orig_video_mode = 3;
            screen_info.orig_video_isVGA = 1;
            screen_info.orig_video_lines = 25;
            screen_info.orig_video_cols = 80;
            screen_info.orig_video_ega_bx = 3;
            screen_info.orig_video_points = 16;
            screen_info.orig_y = screen_info.orig_video_lines - 1;
            if (xen_start_info->console.dom0.info_size >=
                sizeof(struct dom0_vga_console_info)) {
                  const struct dom0_vga_console_info *info =
                        (struct dom0_vga_console_info *)(
                              (char *)xen_start_info +
                              xen_start_info->console.dom0.info_off);
                  dom0_init_screen_info(info);
            }
            xen_start_info->console.domU.mfn = 0;
            xen_start_info->console.domU.evtchn = 0;
      } else
            screen_info.orig_video_isVGA = 0;

      edid_info = EDID_INFO;
      saved_video_mode = SAVED_VIDEO_MODE;
      bootloader_type = LOADER_TYPE;

#ifdef CONFIG_BLK_DEV_RAM
      rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
      rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
      rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);


#endif

      HYPERVISOR_vm_assist(VMASST_CMD_enable,
                       VMASST_TYPE_writable_pagetables);

      ARCH_SETUP
#else
      ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
      screen_info = SCREEN_INFO;
      edid_info = EDID_INFO;
      saved_video_mode = SAVED_VIDEO_MODE;
      bootloader_type = LOADER_TYPE;

#ifdef CONFIG_BLK_DEV_RAM
      rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
      rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
      rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
#endif
#endif      /* !CONFIG_XEN */
      setup_memory_region();
      copy_edd();

      if (!MOUNT_ROOT_RDONLY)
            root_mountflags &= ~MS_RDONLY;
      init_mm.start_code = (unsigned long) &_text;
      init_mm.end_code = (unsigned long) &_etext;
      init_mm.end_data = (unsigned long) &_edata;
      init_mm.brk = (unsigned long) &_end;

      code_resource.start = virt_to_phys(&_text);
      code_resource.end = virt_to_phys(&_etext)-1;
      data_resource.start = virt_to_phys(&_etext);
      data_resource.end = virt_to_phys(&_edata)-1;

      parse_cmdline_early(cmdline_p);

      early_identify_cpu(&boot_cpu_data);

      /*
       * partially used pages are not usable - thus
       * we are rounding upwards:
       */
      end_pfn = e820_end_of_ram();
      num_physpages = end_pfn;            /* for pfn_valid */

      check_efer();

      discover_ebda();

      init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));

      if (is_initial_xendomain())
            dmi_scan_machine();

#ifdef CONFIG_ACPI_NUMA
      /*
       * Parse SRAT to discover nodes.
       */
      acpi_numa_init();
#endif

#ifdef CONFIG_NUMA
      numa_initmem_init(0, end_pfn); 
#else
      contig_initmem_init(0, end_pfn);
#endif

#ifdef CONFIG_XEN
      /*
       * Reserve kernel, physmap, start info, initial page tables, and
       * direct mapping.
       */
      reserve_bootmem_generic(__pa_symbol(&_text),
                              (table_end << PAGE_SHIFT) - __pa_symbol(&_text));
#else
      /* Reserve direct mapping */
      reserve_bootmem_generic(table_start << PAGE_SHIFT, 
                        (table_end - table_start) << PAGE_SHIFT);

      /* reserve kernel */
      reserve_bootmem_generic(__pa_symbol(&_text),
                        __pa_symbol(&_end) - __pa_symbol(&_text));

      /*
       * reserve physical page 0 - it's a special BIOS page on many boxes,
       * enabling clean reboots, SMP operation, laptop functions.
       */
      reserve_bootmem_generic(0, PAGE_SIZE);

      /* reserve ebda region */
      if (ebda_addr)
            reserve_bootmem_generic(ebda_addr, ebda_size);

#ifdef CONFIG_SMP
      /*
       * But first pinch a few for the stack/trampoline stuff
       * FIXME: Don't need the extra page at 4K, but need to fix
       * trampoline before removing it. (see the GDT stuff)
       */
      reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);

      /* Reserve SMP trampoline */
      reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
#endif
#endif

#ifdef CONFIG_ACPI_SLEEP
       /*
        * Reserve low memory region for sleep support.
        */
       acpi_reserve_bootmem();
#endif
#ifdef CONFIG_XEN
#ifdef CONFIG_BLK_DEV_INITRD
      if (xen_start_info->mod_start) {
            if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
                  /*reserve_bootmem_generic(INITRD_START, INITRD_SIZE);*/
                  initrd_start = INITRD_START + PAGE_OFFSET;
                  initrd_end = initrd_start+INITRD_SIZE;
                  initrd_below_start_ok = 1;
            } else {
                  printk(KERN_ERR "initrd extends beyond end of memory "
                        "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
                        (unsigned long)(INITRD_START + INITRD_SIZE),
                        (unsigned long)(end_pfn << PAGE_SHIFT));
                  initrd_start = 0;
            }
      }
#endif
#else /* CONFIG_XEN */
#ifdef CONFIG_BLK_DEV_INITRD
      if (LOADER_TYPE && INITRD_START) {
            if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
                  reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
                  initrd_start =
                        INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
                  initrd_end = initrd_start+INITRD_SIZE;
            }
            else {
                  printk(KERN_ERR "initrd extends beyond end of memory "
                      "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
                      (unsigned long)(INITRD_START + INITRD_SIZE),
                      (unsigned long)(end_pfn << PAGE_SHIFT));
                  initrd_start = 0;
            }
      }
#endif
#endif      /* !CONFIG_XEN */
#ifdef CONFIG_KEXEC
#ifdef CONFIG_XEN
      xen_machine_kexec_setup_resources();
#else
      if (crashk_res.start != crashk_res.end) {
            reserve_bootmem_generic(crashk_res.start,
                  crashk_res.end - crashk_res.start + 1);
      }
#endif
#endif

      paging_init();
#ifdef CONFIG_X86_LOCAL_APIC
      /*
       * Find and reserve possible boot-time SMP configuration:
       */
      find_smp_config();
#endif
#ifdef CONFIG_XEN
      {
            int i, j, k, fpp;

            if (!xen_feature(XENFEAT_auto_translated_physmap)) {
                  /* Make sure we have a large enough P->M table. */
                  phys_to_machine_mapping = alloc_bootmem_pages(
                        end_pfn * sizeof(unsigned long));
                  memset(phys_to_machine_mapping, ~0,
                         end_pfn * sizeof(unsigned long));
                  memcpy(phys_to_machine_mapping,
                         (unsigned long *)xen_start_info->mfn_list,
                         xen_start_info->nr_pages * sizeof(unsigned long));
                  free_bootmem(
                        __pa(xen_start_info->mfn_list),
                        PFN_PHYS(PFN_UP(xen_start_info->nr_pages *
                                    sizeof(unsigned long))));

                  /*
                   * Initialise the list of the frames that specify the
                   * list of frames that make up the p2m table. Used by
                         * save/restore.
                   */
                  pfn_to_mfn_frame_list_list = alloc_bootmem_pages(PAGE_SIZE);

                  fpp = PAGE_SIZE/sizeof(unsigned long);
                  for (i=0, j=0, k=-1; i< end_pfn; i+=fpp, j++) {
                        if ((j % fpp) == 0) {
                              k++;
                              BUG_ON(k>=fpp);
                              pfn_to_mfn_frame_list[k] =
                                    alloc_bootmem_pages(PAGE_SIZE);
                              pfn_to_mfn_frame_list_list[k] =
                                    virt_to_mfn(pfn_to_mfn_frame_list[k]);
                              j=0;
                        }
                        pfn_to_mfn_frame_list[k][j] =
                              virt_to_mfn(&phys_to_machine_mapping[i]);
                  }
                  HYPERVISOR_shared_info->arch.max_pfn = end_pfn;
                  HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
                        virt_to_mfn(pfn_to_mfn_frame_list_list);
            }

      }

      if (!is_initial_xendomain()) {
            acpi_disabled = 1;
#ifdef  CONFIG_ACPI
            acpi_ht = 0;
#endif
      }
#endif

#ifndef CONFIG_XEN
      check_ioapic();
#endif

      zap_low_mappings(0);

      /*
       * set this early, so we dont allocate cpu0
       * if MADT list doesnt list BSP first
       * mpparse.c/MP_processor_info() allocates logical cpu numbers.
       */
      cpu_set(0, cpu_present_map);
#ifdef CONFIG_ACPI
      /*
       * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
       * Call this early for SRAT node setup.
       */
      acpi_boot_table_init();

      /*
       * Read APIC and some other early information from ACPI tables.
       */
      acpi_boot_init();
#endif

      init_cpu_to_node();

#ifdef CONFIG_X86_LOCAL_APIC
      /*
       * get boot-time SMP configuration:
       */
      if (smp_found_config)
            get_smp_config();
#ifndef CONFIG_XEN
      init_apic_mappings();
#endif
#endif
#if defined(CONFIG_XEN) && defined(CONFIG_SMP) && !defined(CONFIG_HOTPLUG_CPU)
      prefill_possible_map();
#endif

      /*
       * Request address space for all standard RAM and ROM resources
       * and also for regions reported as reserved by the e820.
       */
      probe_roms();
#ifdef CONFIG_XEN
      if (is_initial_xendomain()) {
            struct xen_memory_map memmap;

            memmap.nr_entries = E820MAX;
            set_xen_guest_handle(memmap.buffer, machine_e820.map);

            if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
                  BUG();
            machine_e820.nr_map = memmap.nr_entries;

            e820_reserve_resources(machine_e820.map, machine_e820.nr_map);
      }
#else
      e820_reserve_resources(e820.map, e820.nr_map);
#endif

      request_resource(&iomem_resource, &video_ram_resource);

      {
      unsigned i;
      /* request I/O space for devices used on all i[345]86 PCs */
      for (i = 0; i < STANDARD_IO_RESOURCES; i++)
            request_resource(&ioport_resource, &standard_io_resources[i]);
      }

#ifdef CONFIG_XEN
      if (is_initial_xendomain())
            e820_setup_gap(machine_e820.map, machine_e820.nr_map);
#else
      e820_setup_gap(e820.map, e820.nr_map);
#endif

#ifdef CONFIG_XEN
      {
            struct physdev_set_iopl set_iopl;

            set_iopl.iopl = 1;
            HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);

            if (is_initial_xendomain()) {
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
                  conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
                  conswitchp = &dummy_con;
#endif
#endif
            } else {
#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
                  conswitchp = &dummy_con;
#endif
                }
      }
      xencons_early_setup();
#else /* CONFIG_XEN */

#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
      conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
      conswitchp = &dummy_con;
#endif
#endif

#endif /* !CONFIG_XEN */
}

#ifdef CONFIG_XEN
static int
xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
{
      HYPERVISOR_shutdown(SHUTDOWN_crash);
      /* we're never actually going to get here... */
      return NOTIFY_DONE;
}
#endif /* !CONFIG_XEN */


static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
{
      unsigned int *v;

      if (c->extended_cpuid_level < 0x80000004)
            return 0;

      v = (unsigned int *) c->x86_model_id;
      cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
      cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
      cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
      c->x86_model_id[48] = 0;
      return 1;
}


static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
{
      unsigned int n, dummy, eax, ebx, ecx, edx;

      n = c->extended_cpuid_level;

      if (n >= 0x80000005) {
            cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
            printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
                  edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
            c->x86_cache_size=(ecx>>24)+(edx>>24);
            /* On K8 L1 TLB is inclusive, so don't count it */
            c->x86_tlbsize = 0;
      }

      if (n >= 0x80000006) {
            cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
            ecx = cpuid_ecx(0x80000006);
            c->x86_cache_size = ecx >> 16;
            c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);

            printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
            c->x86_cache_size, ecx & 0xFF);
      }

      if (n >= 0x80000007)
            cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power); 
      if (n >= 0x80000008) {
            cpuid(0x80000008, &eax, &dummy, &dummy, &dummy); 
            c->x86_virt_bits = (eax >> 8) & 0xff;
            c->x86_phys_bits = eax & 0xff;
      }
}

#ifdef CONFIG_NUMA
static int nearby_node(int apicid)
{
      int i;
      for (i = apicid - 1; i >= 0; i--) {
            int node = apicid_to_node[i];
            if (node != NUMA_NO_NODE && node_online(node))
                  return node;
      }
      for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
            int node = apicid_to_node[i];
            if (node != NUMA_NO_NODE && node_online(node))
                  return node;
      }
      return first_node(node_online_map); /* Shouldn't happen */
}
#endif

/*
 * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
 * Assumes number of cores is a power of two.
 */
static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
{
#ifdef CONFIG_SMP
      unsigned bits;
#ifdef CONFIG_NUMA
      int cpu = smp_processor_id();
      int node = 0;
      unsigned apicid = hard_smp_processor_id();
#endif
      unsigned ecx = cpuid_ecx(0x80000008);

      c->x86_max_cores = (ecx & 0xff) + 1;

      /* CPU telling us the core id bits shift? */
      bits = (ecx >> 12) & 0xF;

      /* Otherwise recompute */
      if (bits == 0) {
            while ((1 << bits) < c->x86_max_cores)
                  bits++;
      }

      /* Low order bits define the core id (index of core in socket) */
      c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1);
      /* Convert the APIC ID into the socket ID */
      c->phys_proc_id = phys_pkg_id(bits);

#ifdef CONFIG_NUMA
      node = c->phys_proc_id;
      if (apicid_to_node[apicid] != NUMA_NO_NODE)
            node = apicid_to_node[apicid];
      if (!node_online(node)) {
            /* Two possibilities here:
               - The CPU is missing memory and no node was created.
               In that case try picking one from a nearby CPU
               - The APIC IDs differ from the HyperTransport node IDs
               which the K8 northbridge parsing fills in.
               Assume they are all increased by a constant offset,
               but in the same order as the HT nodeids.
               If that doesn't result in a usable node fall back to the
               path for the previous case.  */
            int ht_nodeid = apicid - (cpu_data[0].phys_proc_id << bits);
            if (ht_nodeid >= 0 &&
                apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
                  node = apicid_to_node[ht_nodeid];
            /* Pick a nearby node */
            if (!node_online(node))
                  node = nearby_node(apicid);
      }
      numa_set_node(cpu, node);

      printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
#endif
#endif
}

static void __init init_amd(struct cpuinfo_x86 *c)
{
      unsigned level;

#ifdef CONFIG_SMP
      unsigned long value;

      /*
       * Disable TLB flush filter by setting HWCR.FFDIS on K8
       * bit 6 of msr C001_0015
       *
       * Errata 63 for SH-B3 steppings
       * Errata 122 for all steppings (F+ have it disabled by default)
       */
      if (c->x86 == 15) {
            rdmsrl(MSR_K8_HWCR, value);
            value |= 1 << 6;
            wrmsrl(MSR_K8_HWCR, value);
      }
#endif

      /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
         3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
      clear_bit(0*32+31, &c->x86_capability);
      
      /* On C+ stepping K8 rep microcode works well for copy/memset */
      level = cpuid_eax(1);
      if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
            set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);

      /* Enable workaround for FXSAVE leak */
      if (c->x86 >= 6)
            set_bit(X86_FEATURE_FXSAVE_LEAK, &c->x86_capability);

      level = get_model_name(c);
      if (!level) {
            switch (c->x86) { 
            case 15:
                  /* Should distinguish Models here, but this is only
                     a fallback anyways. */
                  strcpy(c->x86_model_id, "Hammer");
                  break; 
            } 
      } 
      display_cacheinfo(c);

      /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
      if (c->x86_power & (1<<8))
            set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);

      /* Multi core CPU? */
      if (c->extended_cpuid_level >= 0x80000008)
            amd_detect_cmp(c);

      /* Fix cpuid4 emulation for more */
      num_cache_leaves = 3;
}

static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
{
#ifdef CONFIG_SMP
      u32   eax, ebx, ecx, edx;
      int   index_msb, core_bits;

      cpuid(1, &eax, &ebx, &ecx, &edx);


      if (!cpu_has(c, X86_FEATURE_HT))
            return;
      if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
            goto out;

      smp_num_siblings = (ebx & 0xff0000) >> 16;

      if (smp_num_siblings == 1) {
            printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
      } else if (smp_num_siblings > 1 ) {

            if (smp_num_siblings > NR_CPUS) {
                  printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
                  smp_num_siblings = 1;
                  return;
            }

            index_msb = get_count_order(smp_num_siblings);
            c->phys_proc_id = phys_pkg_id(index_msb);

            smp_num_siblings = smp_num_siblings / c->x86_max_cores;

            index_msb = get_count_order(smp_num_siblings) ;

            core_bits = get_count_order(c->x86_max_cores);

            c->cpu_core_id = phys_pkg_id(index_msb) &
                                     ((1 << core_bits) - 1);
      }
out:
      if ((c->x86_max_cores * smp_num_siblings) > 1) {
            printk(KERN_INFO  "CPU: Physical Processor ID: %d\n", c->phys_proc_id);
            printk(KERN_INFO  "CPU: Processor Core ID: %d\n", c->cpu_core_id);
      }

#endif
}

/*
 * find out the number of processor cores on the die
 */
static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
{
      unsigned int eax, t;

      if (c->cpuid_level < 4)
            return 1;

      cpuid_count(4, 0, &eax, &t, &t, &t);

      if (eax & 0x1f)
            return ((eax >> 26) + 1);
      else
            return 1;
}

static void srat_detect_node(void)
{
#ifdef CONFIG_NUMA
      unsigned node;
      int cpu = smp_processor_id();
      int apicid = hard_smp_processor_id();

      /* Don't do the funky fallback heuristics the AMD version employs
         for now. */
      node = apicid_to_node[apicid];
      if (node == NUMA_NO_NODE)
            node = first_node(node_online_map);
      numa_set_node(cpu, node);

      if (acpi_numa > 0)
            printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
#endif
}

static void __cpuinit init_intel(struct cpuinfo_x86 *c)
{
      /* Cache sizes */
      unsigned n;

      init_intel_cacheinfo(c);
      if (c->cpuid_level > 9 ) {
            unsigned eax = cpuid_eax(10);
            /* Check for version and the number of counters */
            if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
                  set_bit(X86_FEATURE_ARCH_PERFMON, &c->x86_capability);
      }

      n = c->extended_cpuid_level;
      if (n >= 0x80000008) {
            unsigned eax = cpuid_eax(0x80000008);
            c->x86_virt_bits = (eax >> 8) & 0xff;
            c->x86_phys_bits = eax & 0xff;
            /* CPUID workaround for Intel 0F34 CPU */
            if (c->x86_vendor == X86_VENDOR_INTEL &&
                c->x86 == 0xF && c->x86_model == 0x3 &&
                c->x86_mask == 0x4)
                  c->x86_phys_bits = 36;
      }

      if (c->x86 == 15)
            c->x86_cache_alignment = c->x86_clflush_size * 2;
      if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
          (c->x86 == 0x6 && c->x86_model >= 0x0e))
            set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
      set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
      c->x86_max_cores = intel_num_cpu_cores(c);

      srat_detect_node();
}

static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
{
      char *v = c->x86_vendor_id;

      if (!strcmp(v, "AuthenticAMD"))
            c->x86_vendor = X86_VENDOR_AMD;
      else if (!strcmp(v, "GenuineIntel"))
            c->x86_vendor = X86_VENDOR_INTEL;
      else
            c->x86_vendor = X86_VENDOR_UNKNOWN;
}

struct cpu_model_info {
      int vendor;
      int family;
      char *model_names[16];
};

/* Do some early cpuid on the boot CPU to get some parameter that are
   needed before check_bugs. Everything advanced is in identify_cpu
   below. */
void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
{
      u32 tfms;

      c->loops_per_jiffy = loops_per_jiffy;
      c->x86_cache_size = -1;
      c->x86_vendor = X86_VENDOR_UNKNOWN;
      c->x86_model = c->x86_mask = 0;     /* So far unknown... */
      c->x86_vendor_id[0] = '\0'; /* Unset */
      c->x86_model_id[0] = '\0';  /* Unset */
      c->x86_clflush_size = 64;
      c->x86_cache_alignment = c->x86_clflush_size;
      c->x86_max_cores = 1;
      c->extended_cpuid_level = 0;
      memset(&c->x86_capability, 0, sizeof c->x86_capability);

      /* Get vendor name */
      cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
            (unsigned int *)&c->x86_vendor_id[0],
            (unsigned int *)&c->x86_vendor_id[8],
            (unsigned int *)&c->x86_vendor_id[4]);
            
      get_cpu_vendor(c);

      /* Initialize the standard set of capabilities */
      /* Note that the vendor-specific code below might override */

      /* Intel-defined flags: level 0x00000001 */
      if (c->cpuid_level >= 0x00000001) {
            __u32 misc;
            cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
                  &c->x86_capability[0]);
            c->x86 = (tfms >> 8) & 0xf;
            c->x86_model = (tfms >> 4) & 0xf;
            c->x86_mask = tfms & 0xf;
            if (c->x86 == 0xf)
                  c->x86 += (tfms >> 20) & 0xff;
            if (c->x86 >= 0x6)
                  c->x86_model += ((tfms >> 16) & 0xF) << 4;
            if (c->x86_capability[0] & (1<<19)) 
                  c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
      } else {
            /* Have CPUID level 0 only - unheard of */
            c->x86 = 4;
      }

#ifdef CONFIG_SMP
      c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
#endif
}

/*
 * This does the hard work of actually picking apart the CPU stuff...
 */
void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
{
      int i;
      u32 xlvl;

      early_identify_cpu(c);

      /* AMD-defined flags: level 0x80000001 */
      xlvl = cpuid_eax(0x80000000);
      c->extended_cpuid_level = xlvl;
      if ((xlvl & 0xffff0000) == 0x80000000) {
            if (xlvl >= 0x80000001) {
                  c->x86_capability[1] = cpuid_edx(0x80000001);
                  c->x86_capability[6] = cpuid_ecx(0x80000001);
            }
            if (xlvl >= 0x80000004)
                  get_model_name(c); /* Default name */
      }

      /* Transmeta-defined flags: level 0x80860001 */
      xlvl = cpuid_eax(0x80860000);
      if ((xlvl & 0xffff0000) == 0x80860000) {
            /* Don't set x86_cpuid_level here for now to not confuse. */
            if (xlvl >= 0x80860001)
                  c->x86_capability[2] = cpuid_edx(0x80860001);
      }

      c->apicid = phys_pkg_id(0);

      /*
       * Vendor-specific initialization.  In this section we
       * canonicalize the feature flags, meaning if there are
       * features a certain CPU supports which CPUID doesn't
       * tell us, CPUID claiming incorrect flags, or other bugs,
       * we handle them here.
       *
       * At the end of this section, c->x86_capability better
       * indicate the features this CPU genuinely supports!
       */
      switch (c->x86_vendor) {
      case X86_VENDOR_AMD:
            init_amd(c);
            break;

      case X86_VENDOR_INTEL:
            init_intel(c);
            break;

      case X86_VENDOR_UNKNOWN:
      default:
            display_cacheinfo(c);
            break;
      }

      select_idle_routine(c);
      detect_ht(c); 

      /*
       * On SMP, boot_cpu_data holds the common feature set between
       * all CPUs; so make sure that we indicate which features are
       * common between the CPUs.  The first time this routine gets
       * executed, c == &boot_cpu_data.
       */
      if (c != &boot_cpu_data) {
            /* AND the already accumulated flags with these */
            for (i = 0 ; i < NCAPINTS ; i++)
                  boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
      }

#ifdef CONFIG_X86_MCE
      mcheck_init(c);
#endif
      if (c == &boot_cpu_data)
            mtrr_bp_init();
      else
            mtrr_ap_init();
#ifdef CONFIG_NUMA
      numa_add_cpu(smp_processor_id());
#endif
}
 

void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
{
      if (c->x86_model_id[0])
            printk("%s", c->x86_model_id);

      if (c->x86_mask || c->cpuid_level >= 0) 
            printk(" stepping %02x\n", c->x86_mask);
      else
            printk("\n");
}

/*
 *    Get CPU information for use by the procfs.
 */

static int show_cpuinfo(struct seq_file *m, void *v)
{
      struct cpuinfo_x86 *c = v;

      /* 
       * These flag bits must match the definitions in <asm/cpufeature.h>.
       * NULL means this bit is undefined or reserved; either way it doesn't
       * have meaning as far as Linux is concerned.  Note that it's important
       * to realize there is a difference between this table and CPUID -- if
       * applications want to get the raw CPUID data, they should access
       * /dev/cpu/<cpu_nr>/cpuid instead.
       */
      static char *x86_cap_flags[] = {
            /* Intel-defined */
              "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
              "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
              "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
              "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,

            /* AMD-defined */
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
            NULL, "fxsr_opt", NULL, "rdtscp", NULL, "lm", "3dnowext", "3dnow",

            /* Transmeta-defined */
            "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

            /* Other (Linux-defined) */
            "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
            "constant_tsc", NULL, NULL,
            "up", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

            /* Intel-defined (#2) */
            "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
            "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

            /* VIA/Cyrix/Centaur-defined */
            NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

            /* AMD-defined (#2) */
            "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
      };
      static char *x86_power_flags[] = { 
            "ts", /* temperature sensor */
            "fid",  /* frequency id control */
            "vid",  /* voltage id control */
            "ttp",  /* thermal trip */
            "tm",
            "stc",
            NULL,
            /* nothing */     /* constant_tsc - moved to flags */
      };


#ifdef CONFIG_SMP
      if (!cpu_online(c-cpu_data))
            return 0;
#endif

      seq_printf(m,"processor\t: %u\n"
                 "vendor_id\t: %s\n"
                 "cpu family\t: %d\n"
                 "model\t\t: %d\n"
                 "model name\t: %s\n",
                 (unsigned)(c-cpu_data),
                 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
                 c->x86,
                 (int)c->x86_model,
                 c->x86_model_id[0] ? c->x86_model_id : "unknown");
      
      if (c->x86_mask || c->cpuid_level >= 0)
            seq_printf(m, "stepping\t: %d\n", c->x86_mask);
      else
            seq_printf(m, "stepping\t: unknown\n");
      
      if (cpu_has(c,X86_FEATURE_TSC)) {
            unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data));
            if (!freq)
                  freq = cpu_khz;
            seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
                       freq / 1000, (freq % 1000));
      }

      /* Cache size */
      if (c->x86_cache_size >= 0) 
            seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
      
#ifdef CONFIG_SMP
      if (smp_num_siblings * c->x86_max_cores > 1) {
            int cpu = c - cpu_data;
            seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
            seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu]));
            seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
            seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
      }
#endif      

      seq_printf(m,
              "fpu\t\t: yes\n"
              "fpu_exception\t: yes\n"
              "cpuid level\t: %d\n"
              "wp\t\t: yes\n"
              "flags\t\t:",
               c->cpuid_level);

      { 
            int i; 
            for ( i = 0 ; i < 32*NCAPINTS ; i++ )
                  if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
                        seq_printf(m, " %s", x86_cap_flags[i]);
      }
            
      seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
               c->loops_per_jiffy/(500000/HZ),
               (c->loops_per_jiffy/(5000/HZ)) % 100);

      if (c->x86_tlbsize > 0) 
            seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
      seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
      seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);

      seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", 
               c->x86_phys_bits, c->x86_virt_bits);

      seq_printf(m, "power management:");
      {
            unsigned i;
            for (i = 0; i < 32; i++) 
                  if (c->x86_power & (1 << i)) {
                        if (i < ARRAY_SIZE(x86_power_flags) &&
                              x86_power_flags[i])
                              seq_printf(m, "%s%s",
                                    x86_power_flags[i][0]?" ":"",
                                    x86_power_flags[i]);
                        else
                              seq_printf(m, " [%d]", i);
                  }
      }

      seq_printf(m, "\n\n");

      return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
      return *pos < NR_CPUS ? cpu_data + *pos : NULL;
}

static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
      ++*pos;
      return c_start(m, pos);
}

static void c_stop(struct seq_file *m, void *v)
{
}

struct seq_operations cpuinfo_op = {
      .start =c_start,
      .next =     c_next,
      .stop =     c_stop,
      .show =     show_cpuinfo,
};

#if defined(CONFIG_INPUT_PCSPKR) || defined(CONFIG_INPUT_PCSPKR_MODULE)
#include <linux/platform_device.h>
static __init int add_pcspkr(void)
{
      struct platform_device *pd;
      int ret;

      if (!is_initial_xendomain())
            return 0;

      pd = platform_device_alloc("pcspkr", -1);
      if (!pd)
            return -ENOMEM;

      ret = platform_device_add(pd);
      if (ret)
            platform_device_put(pd);

      return ret;
}
device_initcall(add_pcspkr);
#endif

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