[mirror_ubuntu-jammy-kernel.git] / arch / i386 / kernel / setup.c

/*
 *  linux/arch/i386/kernel/setup.c
 *
 *  Copyright (C) 1995  Linus Torvalds
 *
 *  Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
 *
 *  Memory region support
 *	David Parsons <orc@pell.chi.il.us>, July-August 1999
 *
 *  Added E820 sanitization routine (removes overlapping memory regions);
 *  Brian Moyle <bmoyle@mvista.com>, February 2001
 *
 * Moved CPU detection code to cpu/${cpu}.c
 *    Patrick Mochel <mochel@osdl.org>, March 2002
 *
 *  Provisions for empty E820 memory regions (reported by certain BIOSes).
 *  Alex Achenbach <xela@slit.de>, December 2002.
 *
 */

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

#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/screen_info.h>
#include <linux/ioport.h>
#include <linux/acpi.h>
#include <linux/apm_bios.h>
#include <linux/initrd.h>
#include <linux/bootmem.h>
#include <linux/seq_file.h>
#include <linux/platform_device.h>
#include <linux/console.h>
#include <linux/mca.h>
#include <linux/root_dev.h>
#include <linux/highmem.h>
#include <linux/module.h>
#include <linux/efi.h>
#include <linux/init.h>
#include <linux/edd.h>
#include <linux/nodemask.h>
#include <linux/kexec.h>
#include <linux/crash_dump.h>
#include <linux/dmi.h>
#include <linux/pfn.h>

#include <video/edid.h>

#include <asm/apic.h>
#include <asm/e820.h>
#include <asm/mpspec.h>
#include <asm/mmzone.h>
#include <asm/setup.h>
#include <asm/arch_hooks.h>
#include <asm/sections.h>
#include <asm/io_apic.h>
#include <asm/ist.h>
#include <asm/io.h>
#include <setup_arch.h>
#include <bios_ebda.h>

/* This value is set up by the early boot code to point to the value
   immediately after the boot time page tables.  It contains a *physical*
   address, and must not be in the .bss segment! */
unsigned long init_pg_tables_end __initdata = ~0UL;

int disable_pse __devinitdata = 0;

/*
 * Machine setup..
 */
extern struct resource code_resource;
extern struct resource data_resource;

/* cpu data as detected by the assembly code in head.S */
struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
/* common cpu data for all cpus */
struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
EXPORT_SYMBOL(boot_cpu_data);

unsigned long mmu_cr4_features;

/* for MCA, but anyone else can use it if they want */
unsigned int machine_id;
#ifdef CONFIG_MCA
EXPORT_SYMBOL(machine_id);
#endif
unsigned int machine_submodel_id;
unsigned int BIOS_revision;
unsigned int mca_pentium_flag;

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

/* user-defined highmem size */
static unsigned int highmem_pages = -1;

/*
 * Setup options
 */
struct drive_info_struct { char dummy[32]; } drive_info;
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || \
    defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE)
EXPORT_SYMBOL(drive_info);
#endif
struct screen_info screen_info;
EXPORT_SYMBOL(screen_info);
struct apm_info apm_info;
EXPORT_SYMBOL(apm_info);
struct sys_desc_table_struct {
	unsigned short length;
	unsigned char table[0];
};
struct edid_info edid_info;
EXPORT_SYMBOL_GPL(edid_info);
struct ist_info ist_info;
#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
	defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
EXPORT_SYMBOL(ist_info);
#endif

extern void early_cpu_init(void);
extern int root_mountflags;

unsigned long saved_videomode;

#define RAMDISK_IMAGE_START_MASK  	0x07FF
#define RAMDISK_PROMPT_FLAG		0x8000
#define RAMDISK_LOAD_FLAG		0x4000	

static char command_line[COMMAND_LINE_SIZE];

unsigned char __initdata boot_params[PARAM_SIZE];

#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

int __initdata user_defined_memmap = 0;

/*
 * "mem=nopentium" disables the 4MB page tables.
 * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
 * to <mem>, overriding the bios size.
 * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
 * <start> to <start>+<mem>, overriding the bios size.
 *
 * HPA tells me bootloaders need to parse mem=, so no new
 * option should be mem=  [also see Documentation/i386/boot.txt]
 */
static int __init parse_mem(char *arg)
{
	if (!arg)
		return -EINVAL;

	if (strcmp(arg, "nopentium") == 0) {
		clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
		disable_pse = 1;
	} else {
		/* If the user specifies memory size, we
		 * limit the BIOS-provided memory map to
		 * that size. exactmap can be used to specify
		 * the exact map. mem=number can be used to
		 * trim the existing memory map.
		 */
		unsigned long long mem_size;
 
		mem_size = memparse(arg, &arg);
		limit_regions(mem_size);
		user_defined_memmap = 1;
	}
	return 0;
}
early_param("mem", parse_mem);

#ifdef CONFIG_PROC_VMCORE
/* elfcorehdr= specifies the location of elf core header
 * stored by the crashed kernel.
 */
static int __init parse_elfcorehdr(char *arg)
{
	if (!arg)
		return -EINVAL;

	elfcorehdr_addr = memparse(arg, &arg);
	return 0;
}
early_param("elfcorehdr", parse_elfcorehdr);
#endif /* CONFIG_PROC_VMCORE */

/*
 * highmem=size forces highmem to be exactly 'size' bytes.
 * This works even on boxes that have no highmem otherwise.
 * This also works to reduce highmem size on bigger boxes.
 */
static int __init parse_highmem(char *arg)
{
	if (!arg)
		return -EINVAL;

	highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
	return 0;
}
early_param("highmem", parse_highmem);

/*
 * vmalloc=size forces the vmalloc area to be exactly 'size'
 * bytes. This can be used to increase (or decrease) the
 * vmalloc area - the default is 128m.
 */
static int __init parse_vmalloc(char *arg)
{
	if (!arg)
		return -EINVAL;

	__VMALLOC_RESERVE = memparse(arg, &arg);
	return 0;
}
early_param("vmalloc", parse_vmalloc);

/*
 * reservetop=size reserves a hole at the top of the kernel address space which
 * a hypervisor can load into later.  Needed for dynamically loaded hypervisors,
 * so relocating the fixmap can be done before paging initialization.
 */
static int __init parse_reservetop(char *arg)
{
	unsigned long address;

	if (!arg)
		return -EINVAL;

	address = memparse(arg, &arg);
	reserve_top_address(address);
	return 0;
}
early_param("reservetop", parse_reservetop);

/*
 * Determine low and high memory ranges:
 */
unsigned long __init find_max_low_pfn(void)
{
	unsigned long max_low_pfn;

	max_low_pfn = max_pfn;
	if (max_low_pfn > MAXMEM_PFN) {
		if (highmem_pages == -1)
			highmem_pages = max_pfn - MAXMEM_PFN;
		if (highmem_pages + MAXMEM_PFN < max_pfn)
			max_pfn = MAXMEM_PFN + highmem_pages;
		if (highmem_pages + MAXMEM_PFN > max_pfn) {
			printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages));
			highmem_pages = 0;
		}
		max_low_pfn = MAXMEM_PFN;
#ifndef CONFIG_HIGHMEM
		/* Maximum memory usable is what is directly addressable */
		printk(KERN_WARNING "Warning only %ldMB will be used.\n",
					MAXMEM>>20);
		if (max_pfn > MAX_NONPAE_PFN)
			printk(KERN_WARNING "Use a PAE enabled kernel.\n");
		else
			printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
		max_pfn = MAXMEM_PFN;
#else /* !CONFIG_HIGHMEM */
#ifndef CONFIG_X86_PAE
		if (max_pfn > MAX_NONPAE_PFN) {
			max_pfn = MAX_NONPAE_PFN;
			printk(KERN_WARNING "Warning only 4GB will be used.\n");
			printk(KERN_WARNING "Use a PAE enabled kernel.\n");
		}
#endif /* !CONFIG_X86_PAE */
#endif /* !CONFIG_HIGHMEM */
	} else {
		if (highmem_pages == -1)
			highmem_pages = 0;
#ifdef CONFIG_HIGHMEM
		if (highmem_pages >= max_pfn) {
			printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn));
			highmem_pages = 0;
		}
		if (highmem_pages) {
			if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){
				printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages));
				highmem_pages = 0;
			}
			max_low_pfn -= highmem_pages;
		}
#else
		if (highmem_pages)
			printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n");
#endif
	}
	return max_low_pfn;
}

/*
 * workaround for Dell systems that neglect to reserve EBDA
 */
static void __init reserve_ebda_region(void)
{
	unsigned int addr;
	addr = get_bios_ebda();
	if (addr)
		reserve_bootmem(addr, PAGE_SIZE);	
}

#ifndef CONFIG_NEED_MULTIPLE_NODES
void __init setup_bootmem_allocator(void);
static unsigned long __init setup_memory(void)
{
	/*
	 * partially used pages are not usable - thus
	 * we are rounding upwards:
	 */
	min_low_pfn = PFN_UP(init_pg_tables_end);

	find_max_pfn();

	max_low_pfn = find_max_low_pfn();

#ifdef CONFIG_HIGHMEM
	highstart_pfn = highend_pfn = max_pfn;
	if (max_pfn > max_low_pfn) {
		highstart_pfn = max_low_pfn;
	}
	printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
		pages_to_mb(highend_pfn - highstart_pfn));
	num_physpages = highend_pfn;
	high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
#else
	num_physpages = max_low_pfn;
	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
#endif
#ifdef CONFIG_FLATMEM
	max_mapnr = num_physpages;
#endif
	printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
			pages_to_mb(max_low_pfn));

	setup_bootmem_allocator();

	return max_low_pfn;
}

void __init zone_sizes_init(void)
{
	unsigned long max_zone_pfns[MAX_NR_ZONES];
	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
	max_zone_pfns[ZONE_DMA] =
		virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
#ifdef CONFIG_HIGHMEM
	max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
	add_active_range(0, 0, highend_pfn);
#else
	add_active_range(0, 0, max_low_pfn);
#endif

	free_area_init_nodes(max_zone_pfns);
}
#else
extern unsigned long __init setup_memory(void);
extern void zone_sizes_init(void);
#endif /* !CONFIG_NEED_MULTIPLE_NODES */

void __init setup_bootmem_allocator(void)
{
	unsigned long bootmap_size;
	/*
	 * Initialize the boot-time allocator (with low memory only):
	 */
	bootmap_size = init_bootmem(min_low_pfn, max_low_pfn);

	register_bootmem_low_pages(max_low_pfn);

	/*
	 * Reserve the bootmem bitmap itself as well. We do this in two
	 * steps (first step was init_bootmem()) because this catches
	 * the (very unlikely) case of us accidentally initializing the
	 * bootmem allocator with an invalid RAM area.
	 */
	reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
			 bootmap_size + PAGE_SIZE-1) - __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(0, PAGE_SIZE);

	/* reserve EBDA region, it's a 4K region */
	reserve_ebda_region();

    /* could be an AMD 768MPX chipset. Reserve a page  before VGA to prevent
       PCI prefetch into it (errata #56). Usually the page is reserved anyways,
       unless you have no PS/2 mouse plugged in. */
	if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
	    boot_cpu_data.x86 == 6)
	     reserve_bootmem(0xa0000 - 4096, 4096);

#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(PAGE_SIZE, PAGE_SIZE);
#endif
#ifdef CONFIG_ACPI_SLEEP
	/*
	 * Reserve low memory region for sleep support.
	 */
	acpi_reserve_bootmem();
#endif
#ifdef CONFIG_X86_FIND_SMP_CONFIG
	/*
	 * Find and reserve possible boot-time SMP configuration:
	 */
	find_smp_config();
#endif
	numa_kva_reserve();
#ifdef CONFIG_BLK_DEV_INITRD
	if (LOADER_TYPE && INITRD_START) {
		if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
			reserve_bootmem(INITRD_START, INITRD_SIZE);
			initrd_start = INITRD_START + PAGE_OFFSET;
			initrd_end = initrd_start+INITRD_SIZE;
		}
		else {
			printk(KERN_ERR "initrd extends beyond end of memory "
			    "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
			    INITRD_START + INITRD_SIZE,
			    max_low_pfn << PAGE_SHIFT);
			initrd_start = 0;
		}
	}
#endif
#ifdef CONFIG_KEXEC
	if (crashk_res.start != crashk_res.end)
		reserve_bootmem(crashk_res.start,
			crashk_res.end - crashk_res.start + 1);
#endif
}

/*
 * The node 0 pgdat is initialized before all of these because
 * it's needed for bootmem.  node>0 pgdats have their virtual
 * space allocated before the pagetables are in place to access
 * them, so they can't be cleared then.
 *
 * This should all compile down to nothing when NUMA is off.
 */
void __init remapped_pgdat_init(void)
{
	int nid;

	for_each_online_node(nid) {
		if (nid != 0)
			memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
	}
}

#ifdef CONFIG_MCA
static void set_mca_bus(int x)
{
	MCA_bus = x;
}
#else
static void set_mca_bus(int x) { }
#endif

/* Overridden in paravirt.c if CONFIG_PARAVIRT */
char * __attribute__((weak)) memory_setup(void)
{
	return machine_specific_memory_setup();
}

/*
 * Determine if we were loaded by an EFI loader.  If so, then we have also been
 * passed the efi memmap, systab, etc., so we should use these data structures
 * for initialization.  Note, the efi init code path is determined by the
 * global efi_enabled. This allows the same kernel image to be used on existing
 * systems (with a traditional BIOS) as well as on EFI systems.
 */
void __init setup_arch(char **cmdline_p)
{
	unsigned long max_low_pfn;

	memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
	pre_setup_arch_hook();
	early_cpu_init();

	/*
	 * FIXME: This isn't an official loader_type right
	 * now but does currently work with elilo.
	 * If we were configured as an EFI kernel, check to make
	 * sure that we were loaded correctly from elilo and that
	 * the system table is valid.  If not, then initialize normally.
	 */
#ifdef CONFIG_EFI
	if ((LOADER_TYPE == 0x50) && EFI_SYSTAB)
		efi_enabled = 1;
#endif

 	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
 	drive_info = DRIVE_INFO;
 	screen_info = SCREEN_INFO;
	edid_info = EDID_INFO;
	apm_info.bios = APM_BIOS_INFO;
	ist_info = IST_INFO;
	saved_videomode = VIDEO_MODE;
	if( SYS_DESC_TABLE.length != 0 ) {
		set_mca_bus(SYS_DESC_TABLE.table[3] & 0x2);
		machine_id = SYS_DESC_TABLE.table[0];
		machine_submodel_id = SYS_DESC_TABLE.table[1];
		BIOS_revision = SYS_DESC_TABLE.table[2];
	}
	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
	ARCH_SETUP
	if (efi_enabled)
		efi_init();
	else {
		printk(KERN_INFO "BIOS-provided physical RAM map:\n");
		print_memory_map(memory_setup());
	}

	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 = init_pg_tables_end + PAGE_OFFSET;

	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_early_param();

	if (user_defined_memmap) {
		printk(KERN_INFO "user-defined physical RAM map:\n");
		print_memory_map("user");
	}

	strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
	*cmdline_p = command_line;

	max_low_pfn = setup_memory();

	/*
	 * NOTE: before this point _nobody_ is allowed to allocate
	 * any memory using the bootmem allocator.  Although the
	 * alloctor is now initialised only the first 8Mb of the kernel
	 * virtual address space has been mapped.  All allocations before
	 * paging_init() has completed must use the alloc_bootmem_low_pages()
	 * variant (which allocates DMA'able memory) and care must be taken
	 * not to exceed the 8Mb limit.
	 */

#ifdef CONFIG_SMP
	smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
#endif
	paging_init();
	remapped_pgdat_init();
	sparse_init();
	zone_sizes_init();

	/*
	 * NOTE: at this point the bootmem allocator is fully available.
	 */

	dmi_scan_machine();

#ifdef CONFIG_X86_GENERICARCH
	generic_apic_probe();
#endif	
	if (efi_enabled)
		efi_map_memmap();

#ifdef CONFIG_ACPI
	/*
	 * Parse the ACPI tables for possible boot-time SMP configuration.
	 */
	acpi_boot_table_init();
#endif

#ifdef CONFIG_PCI
#ifdef CONFIG_X86_IO_APIC
	check_acpi_pci();	/* Checks more than just ACPI actually */
#endif
#endif

#ifdef CONFIG_ACPI
	acpi_boot_init();

#if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
	if (def_to_bigsmp)
		printk(KERN_WARNING "More than 8 CPUs detected and "
			"CONFIG_X86_PC cannot handle it.\nUse "
			"CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
#endif
#endif
#ifdef CONFIG_X86_LOCAL_APIC
	if (smp_found_config)
		get_smp_config();
#endif

	register_memory();

#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
	if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
		conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
	conswitchp = &dummy_con;
#endif
#endif
	tsc_init();
}

static __init int add_pcspkr(void)
{
	struct platform_device *pd;
	int ret;

	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);

/*
 * Local Variables:
 * mode:c
 * c-file-style:"k&r"
 * c-basic-offset:8
 * End:
 */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/i386/kernel/setup.c
	3	*
	4	* Copyright (C) 1995 Linus Torvalds
	5	*
	6	* Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
	7	*
	8	* Memory region support
	9	* David Parsons <orc@pell.chi.il.us>, July-August 1999
	10	*
	11	* Added E820 sanitization routine (removes overlapping memory regions);
	12	* Brian Moyle <bmoyle@mvista.com>, February 2001
	13	*
	14	* Moved CPU detection code to cpu/${cpu}.c
	15	* Patrick Mochel <mochel@osdl.org>, March 2002
	16	*
	17	* Provisions for empty E820 memory regions (reported by certain BIOSes).
	18	* Alex Achenbach <xela@slit.de>, December 2002.
	19	*
	20	*/
	21
	22	/*
	23	* This file handles the architecture-dependent parts of initialization
	24	*/
	25
	26	#include <linux/sched.h>
	27	#include <linux/mm.h>
05b79bdc	28	#include <linux/mmzone.h>
894673ee	29	#include <linux/screen_info.h>
1da177e4 LT	30	#include <linux/ioport.h>
	31	#include <linux/acpi.h>
	32	#include <linux/apm_bios.h>
	33	#include <linux/initrd.h>
	34	#include <linux/bootmem.h>
	35	#include <linux/seq_file.h>
e5c6c8e4	36	#include <linux/platform_device.h>
1da177e4 LT	37	#include <linux/console.h>
	38	#include <linux/mca.h>
	39	#include <linux/root_dev.h>
	40	#include <linux/highmem.h>
	41	#include <linux/module.h>
	42	#include <linux/efi.h>
	43	#include <linux/init.h>
	44	#include <linux/edd.h>
	45	#include <linux/nodemask.h>
1bc3b91a	46	#include <linux/kexec.h>
2030eae5	47	#include <linux/crash_dump.h>
e9928674	48	#include <linux/dmi.h>
22a9835c	49	#include <linux/pfn.h>
1bc3b91a	50
1da177e4	51	#include <video/edid.h>
1bc3b91a	52
9635b47d	53	#include <asm/apic.h>
1da177e4 LT	54	#include <asm/e820.h>
1da177e4 LT	55	#include <asm/mpspec.h>
91023300	56	#include <asm/mmzone.h>
1da177e4 LT	57	#include <asm/setup.h>
	58	#include <asm/arch_hooks.h>
	59	#include <asm/sections.h>
	60	#include <asm/io_apic.h>
	61	#include <asm/ist.h>
	62	#include <asm/io.h>
e75eac33	63	#include <setup_arch.h>
1da177e4 LT	64	#include <bios_ebda.h>
	65
	66	/* This value is set up by the early boot code to point to the value
	67	immediately after the boot time page tables. It contains a physical
	68	address, and must not be in the .bss segment! */
	69	unsigned long init_pg_tables_end __initdata = ~0UL;
	70
0bb3184d	71	int disable_pse __devinitdata = 0;
1da177e4 LT	72
	73	/*
	74	* Machine setup..
	75	*/
269c2d81	76	extern struct resource code_resource;
269c2d81	77	extern struct resource data_resource;
1da177e4 LT	78
	79	/* cpu data as detected by the assembly code in head.S */
	80	struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
	81	/* common cpu data for all cpus */
c3d8c141	82	struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
129f6946	83	EXPORT_SYMBOL(boot_cpu_data);
1da177e4 LT	84
	85	unsigned long mmu_cr4_features;
	86
1da177e4 LT	87	/* for MCA, but anyone else can use it if they want */
1da177e4 LT	88	unsigned int machine_id;
129f6946 AD	89	#ifdef CONFIG_MCA
	90	EXPORT_SYMBOL(machine_id);
	91	#endif
1da177e4 LT	92	unsigned int machine_submodel_id;
	93	unsigned int BIOS_revision;
	94	unsigned int mca_pentium_flag;
	95
1da177e4 LT	96	/* Boot loader ID as an integer, for the benefit of proc_dointvec */
	97	int bootloader_type;
	98
	99	/* user-defined highmem size */
	100	static unsigned int highmem_pages = -1;
	101
	102	/*
	103	* Setup options
	104	*/
	105	struct drive_info_struct { char dummy[32]; } drive_info;
129f6946 AD	106	#if defined(CONFIG_BLK_DEV_IDE) \|\| defined(CONFIG_BLK_DEV_HD) \|\| \
	107	defined(CONFIG_BLK_DEV_IDE_MODULE) \|\| defined(CONFIG_BLK_DEV_HD_MODULE)
	108	EXPORT_SYMBOL(drive_info);
	109	#endif
1da177e4	110	struct screen_info screen_info;
129f6946	111	EXPORT_SYMBOL(screen_info);
1da177e4	112	struct apm_info apm_info;
129f6946	113	EXPORT_SYMBOL(apm_info);
1da177e4 LT	114	struct sys_desc_table_struct {
	115	unsigned short length;
	116	unsigned char table[0];
	117	};
	118	struct edid_info edid_info;
5e518d76	119	EXPORT_SYMBOL_GPL(edid_info);
1da177e4	120	struct ist_info ist_info;
129f6946 AD	121	#if defined(CONFIG_X86_SPEEDSTEP_SMI) \|\| \
	122	defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
	123	EXPORT_SYMBOL(ist_info);
	124	#endif
1da177e4 LT	125
1da177e4 LT	126	extern void early_cpu_init(void);
1da177e4 LT	127	extern int root_mountflags;
	128
	129	unsigned long saved_videomode;
	130
	131	#define RAMDISK_IMAGE_START_MASK 0x07FF
	132	#define RAMDISK_PROMPT_FLAG 0x8000
	133	#define RAMDISK_LOAD_FLAG 0x4000
	134
	135	static char command_line[COMMAND_LINE_SIZE];
	136
	137	unsigned char __initdata boot_params[PARAM_SIZE];
	138
1da177e4 LT	139	#if defined(CONFIG_EDD) \|\| defined(CONFIG_EDD_MODULE)
	140	struct edd edd;
	141	#ifdef CONFIG_EDD_MODULE
	142	EXPORT_SYMBOL(edd);
	143	#endif
	144	/**
	145	* copy_edd() - Copy the BIOS EDD information
	146	* from boot_params into a safe place.
	147	*
	148	*/
	149	static inline void copy_edd(void)
	150	{
	151	memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
	152	memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
	153	edd.mbr_signature_nr = EDD_MBR_SIG_NR;
	154	edd.edd_info_nr = EDD_NR;
	155	}
	156	#else
	157	static inline void copy_edd(void)
	158	{
	159	}
	160	#endif
	161
cef518e8	162	int __initdata user_defined_memmap = 0;
1da177e4	163
1a3f239d RR	164	/*
	165	* "mem=nopentium" disables the 4MB page tables.
	166	* "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
	167	* to <mem>, overriding the bios size.
	168	* "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
	169	* <start> to <start>+<mem>, overriding the bios size.
	170	*
	171	* HPA tells me bootloaders need to parse mem=, so no new
	172	* option should be mem= [also see Documentation/i386/boot.txt]
	173	*/
	174	static int __init parse_mem(char *arg)
	175	{
	176	if (!arg)
	177	return -EINVAL;
1da177e4	178
1a3f239d RR	179	if (strcmp(arg, "nopentium") == 0) {
	180	clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
	181	disable_pse = 1;
	182	} else {
	183	/* If the user specifies memory size, we
	184	* limit the BIOS-provided memory map to
	185	* that size. exactmap can be used to specify
	186	* the exact map. mem=number can be used to
	187	* trim the existing memory map.
1da177e4	188	*/
1a3f239d	189	unsigned long long mem_size;
1da177e4	190
1a3f239d RR	191	mem_size = memparse(arg, &arg);
	192	limit_regions(mem_size);
	193	user_defined_memmap = 1;
	194	}
	195	return 0;
	196	}
	197	early_param("mem", parse_mem);
1da177e4	198
1a3f239d RR	199	#ifdef CONFIG_PROC_VMCORE
	200	/* elfcorehdr= specifies the location of elf core header
	201	* stored by the crashed kernel.
	202	*/
	203	static int __init parse_elfcorehdr(char *arg)
	204	{
	205	if (!arg)
	206	return -EINVAL;
66759a01	207
1a3f239d RR	208	elfcorehdr_addr = memparse(arg, &arg);
	209	return 0;
	210	}
	211	early_param("elfcorehdr", parse_elfcorehdr);
	212	#endif /* CONFIG_PROC_VMCORE */
1da177e4	213
1a3f239d RR	214	/*
	215	* highmem=size forces highmem to be exactly 'size' bytes.
	216	* This works even on boxes that have no highmem otherwise.
	217	* This also works to reduce highmem size on bigger boxes.
	218	*/
	219	static int __init parse_highmem(char *arg)
	220	{
	221	if (!arg)
	222	return -EINVAL;
9635b47d	223
1a3f239d RR	224	highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
	225	return 0;
	226	}
	227	early_param("highmem", parse_highmem);
9635b47d	228
1a3f239d RR	229	/*
	230	* vmalloc=size forces the vmalloc area to be exactly 'size'
	231	* bytes. This can be used to increase (or decrease) the
	232	* vmalloc area - the default is 128m.
	233	*/
	234	static int __init parse_vmalloc(char *arg)
	235	{
	236	if (!arg)
	237	return -EINVAL;
1bc3b91a	238
1a3f239d RR	239	__VMALLOC_RESERVE = memparse(arg, &arg);
1a3f239d RR	240	return 0;
1da177e4	241	}
1a3f239d	242	early_param("vmalloc", parse_vmalloc);
1da177e4	243
461a9aff ZA	244	/*
	245	* reservetop=size reserves a hole at the top of the kernel address space which
	246	* a hypervisor can load into later. Needed for dynamically loaded hypervisors,
	247	* so relocating the fixmap can be done before paging initialization.
	248	*/
	249	static int __init parse_reservetop(char *arg)
	250	{
	251	unsigned long address;
	252
	253	if (!arg)
	254	return -EINVAL;
	255
	256	address = memparse(arg, &arg);
	257	reserve_top_address(address);
	258	return 0;
	259	}
	260	early_param("reservetop", parse_reservetop);
	261
1da177e4 LT	262	/*
	263	* Determine low and high memory ranges:
	264	*/
	265	unsigned long __init find_max_low_pfn(void)
	266	{
	267	unsigned long max_low_pfn;
	268
	269	max_low_pfn = max_pfn;
	270	if (max_low_pfn > MAXMEM_PFN) {
	271	if (highmem_pages == -1)
	272	highmem_pages = max_pfn - MAXMEM_PFN;
	273	if (highmem_pages + MAXMEM_PFN < max_pfn)
	274	max_pfn = MAXMEM_PFN + highmem_pages;
	275	if (highmem_pages + MAXMEM_PFN > max_pfn) {
	276	printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages));
	277	highmem_pages = 0;
	278	}
	279	max_low_pfn = MAXMEM_PFN;
	280	#ifndef CONFIG_HIGHMEM
	281	/* Maximum memory usable is what is directly addressable */
	282	printk(KERN_WARNING "Warning only %ldMB will be used.\n",
	283	MAXMEM>>20);
	284	if (max_pfn > MAX_NONPAE_PFN)
	285	printk(KERN_WARNING "Use a PAE enabled kernel.\n");
	286	else
	287	printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
	288	max_pfn = MAXMEM_PFN;
	289	#else /* !CONFIG_HIGHMEM */
	290	#ifndef CONFIG_X86_PAE
	291	if (max_pfn > MAX_NONPAE_PFN) {
	292	max_pfn = MAX_NONPAE_PFN;
	293	printk(KERN_WARNING "Warning only 4GB will be used.\n");
	294	printk(KERN_WARNING "Use a PAE enabled kernel.\n");
	295	}
	296	#endif /* !CONFIG_X86_PAE */
	297	#endif /* !CONFIG_HIGHMEM */
	298	} else {
	299	if (highmem_pages == -1)
	300	highmem_pages = 0;
	301	#ifdef CONFIG_HIGHMEM
	302	if (highmem_pages >= max_pfn) {
	303	printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn));
	304	highmem_pages = 0;
	305	}
	306	if (highmem_pages) {
	307	if (max_low_pfn-highmem_pages < 6410241024/PAGE_SIZE){
	308	printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages));
	309	highmem_pages = 0;
	310	}
	311	max_low_pfn -= highmem_pages;
	312	}
	313	#else
	314	if (highmem_pages)
	315	printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n");
	316	#endif
	317	}
	318	return max_low_pfn;
	319	}
	320
1da177e4 LT	321	/*
	322	* workaround for Dell systems that neglect to reserve EBDA
	323	*/
	324	static void __init reserve_ebda_region(void)
	325	{
	326	unsigned int addr;
	327	addr = get_bios_ebda();
	328	if (addr)
	329	reserve_bootmem(addr, PAGE_SIZE);
	330	}
	331
05b79bdc	332	#ifndef CONFIG_NEED_MULTIPLE_NODES
1da177e4 LT	333	void __init setup_bootmem_allocator(void);
	334	static unsigned long __init setup_memory(void)
	335	{
	336	/*
	337	* partially used pages are not usable - thus
	338	* we are rounding upwards:
	339	*/
	340	min_low_pfn = PFN_UP(init_pg_tables_end);
	341
	342	find_max_pfn();
	343
	344	max_low_pfn = find_max_low_pfn();
	345
	346	#ifdef CONFIG_HIGHMEM
	347	highstart_pfn = highend_pfn = max_pfn;
	348	if (max_pfn > max_low_pfn) {
	349	highstart_pfn = max_low_pfn;
	350	}
	351	printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
	352	pages_to_mb(highend_pfn - highstart_pfn));
ba9c231f JB	353	num_physpages = highend_pfn;
	354	high_memory = (void ) __va(highstart_pfn PAGE_SIZE - 1) + 1;
	355	#else
	356	num_physpages = max_low_pfn;
	357	high_memory = (void ) __va(max_low_pfn PAGE_SIZE - 1) + 1;
	358	#endif
	359	#ifdef CONFIG_FLATMEM
	360	max_mapnr = num_physpages;
1da177e4 LT	361	#endif
	362	printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
	363	pages_to_mb(max_low_pfn));
	364
	365	setup_bootmem_allocator();
	366
	367	return max_low_pfn;
	368	}
	369
	370	void __init zone_sizes_init(void)
	371	{
6391af17 MG	372	unsigned long max_zone_pfns[MAX_NR_ZONES];
	373	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
	374	max_zone_pfns[ZONE_DMA] =
	375	virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
	376	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
1da177e4	377	#ifdef CONFIG_HIGHMEM
6391af17	378	max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
4cfee88a MG	379	add_active_range(0, 0, highend_pfn);
4cfee88a MG	380	#else
4cfee88a	381	add_active_range(0, 0, max_low_pfn);
1da177e4	382	#endif
4cfee88a MG	383
4cfee88a MG	384	free_area_init_nodes(max_zone_pfns);
1da177e4 LT	385	}
1da177e4 LT	386	#else
05b79bdc	387	extern unsigned long __init setup_memory(void);
1da177e4	388	extern void zone_sizes_init(void);
05b79bdc	389	#endif /* !CONFIG_NEED_MULTIPLE_NODES */
1da177e4 LT	390
	391	void __init setup_bootmem_allocator(void)
	392	{
	393	unsigned long bootmap_size;
	394	/*
	395	* Initialize the boot-time allocator (with low memory only):
	396	*/
	397	bootmap_size = init_bootmem(min_low_pfn, max_low_pfn);
	398
	399	register_bootmem_low_pages(max_low_pfn);
	400
	401	/*
	402	* Reserve the bootmem bitmap itself as well. We do this in two
	403	* steps (first step was init_bootmem()) because this catches
	404	* the (very unlikely) case of us accidentally initializing the
	405	* bootmem allocator with an invalid RAM area.
	406	*/
8621b81c EB	407	reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
8621b81c EB	408	bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text));
1da177e4 LT	409
	410	/*
	411	* reserve physical page 0 - it's a special BIOS page on many boxes,
	412	* enabling clean reboots, SMP operation, laptop functions.
	413	*/
	414	reserve_bootmem(0, PAGE_SIZE);
	415
	416	/* reserve EBDA region, it's a 4K region */
	417	reserve_ebda_region();
	418
	419	/* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent
	420	PCI prefetch into it (errata #56). Usually the page is reserved anyways,
	421	unless you have no PS/2 mouse plugged in. */
	422	if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
	423	boot_cpu_data.x86 == 6)
	424	reserve_bootmem(0xa0000 - 4096, 4096);
	425
	426	#ifdef CONFIG_SMP
	427	/*
	428	* But first pinch a few for the stack/trampoline stuff
	429	* FIXME: Don't need the extra page at 4K, but need to fix
	430	* trampoline before removing it. (see the GDT stuff)
	431	*/
	432	reserve_bootmem(PAGE_SIZE, PAGE_SIZE);
	433	#endif
	434	#ifdef CONFIG_ACPI_SLEEP
	435	/*
	436	* Reserve low memory region for sleep support.
	437	*/
	438	acpi_reserve_bootmem();
	439	#endif
	440	#ifdef CONFIG_X86_FIND_SMP_CONFIG
	441	/*
	442	* Find and reserve possible boot-time SMP configuration:
	443	*/
	444	find_smp_config();
	445	#endif
91023300	446	numa_kva_reserve();
1da177e4 LT	447	#ifdef CONFIG_BLK_DEV_INITRD
	448	if (LOADER_TYPE && INITRD_START) {
	449	if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
	450	reserve_bootmem(INITRD_START, INITRD_SIZE);
19e5d9c0	451	initrd_start = INITRD_START + PAGE_OFFSET;
1da177e4 LT	452	initrd_end = initrd_start+INITRD_SIZE;
	453	}
	454	else {
	455	printk(KERN_ERR "initrd extends beyond end of memory "
	456	"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
	457	INITRD_START + INITRD_SIZE,
	458	max_low_pfn << PAGE_SHIFT);
	459	initrd_start = 0;
	460	}
	461	}
	462	#endif
1bc3b91a EB	463	#ifdef CONFIG_KEXEC
	464	if (crashk_res.start != crashk_res.end)
	465	reserve_bootmem(crashk_res.start,
	466	crashk_res.end - crashk_res.start + 1);
	467	#endif
1da177e4 LT	468	}
	469
	470	/*
	471	* The node 0 pgdat is initialized before all of these because
	472	* it's needed for bootmem. node>0 pgdats have their virtual
	473	* space allocated before the pagetables are in place to access
	474	* them, so they can't be cleared then.
	475	*
	476	* This should all compile down to nothing when NUMA is off.
	477	*/
	478	void __init remapped_pgdat_init(void)
	479	{
	480	int nid;
	481
	482	for_each_online_node(nid) {
	483	if (nid != 0)
	484	memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
	485	}
	486	}
	487
1da177e4 LT	488	#ifdef CONFIG_MCA
	489	static void set_mca_bus(int x)
	490	{
	491	MCA_bus = x;
	492	}
	493	#else
	494	static void set_mca_bus(int x) { }
	495	#endif
	496
d3561b7f RR	497	/* Overridden in paravirt.c if CONFIG_PARAVIRT */
	498	char * __attribute__((weak)) memory_setup(void)
	499	{
	500	return machine_specific_memory_setup();
	501	}
	502
1da177e4 LT	503	/*
	504	* Determine if we were loaded by an EFI loader. If so, then we have also been
	505	* passed the efi memmap, systab, etc., so we should use these data structures
	506	* for initialization. Note, the efi init code path is determined by the
	507	* global efi_enabled. This allows the same kernel image to be used on existing
	508	* systems (with a traditional BIOS) as well as on EFI systems.
	509	*/
	510	void __init setup_arch(char **cmdline_p)
	511	{
	512	unsigned long max_low_pfn;
	513
	514	memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
	515	pre_setup_arch_hook();
	516	early_cpu_init();
	517
	518	/*
	519	* FIXME: This isn't an official loader_type right
	520	* now but does currently work with elilo.
	521	* If we were configured as an EFI kernel, check to make
	522	* sure that we were loaded correctly from elilo and that
	523	* the system table is valid. If not, then initialize normally.
	524	*/
	525	#ifdef CONFIG_EFI
	526	if ((LOADER_TYPE == 0x50) && EFI_SYSTAB)
	527	efi_enabled = 1;
	528	#endif
	529
	530	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
	531	drive_info = DRIVE_INFO;
	532	screen_info = SCREEN_INFO;
	533	edid_info = EDID_INFO;
	534	apm_info.bios = APM_BIOS_INFO;
	535	ist_info = IST_INFO;
	536	saved_videomode = VIDEO_MODE;
	537	if( SYS_DESC_TABLE.length != 0 ) {
	538	set_mca_bus(SYS_DESC_TABLE.table[3] & 0x2);
	539	machine_id = SYS_DESC_TABLE.table[0];
	540	machine_submodel_id = SYS_DESC_TABLE.table[1];
	541	BIOS_revision = SYS_DESC_TABLE.table[2];
	542	}
	543	bootloader_type = LOADER_TYPE;
	544
	545	#ifdef CONFIG_BLK_DEV_RAM
	546	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
	547	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
	548	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
	549	#endif
	550	ARCH_SETUP
	551	if (efi_enabled)
	552	efi_init();
	553	else {
	554	printk(KERN_INFO "BIOS-provided physical RAM map:\n");
d3561b7f	555	print_memory_map(memory_setup());
1da177e4 LT	556	}
	557
	558	copy_edd();
	559
	560	if (!MOUNT_ROOT_RDONLY)
	561	root_mountflags &= ~MS_RDONLY;
	562	init_mm.start_code = (unsigned long) _text;
	563	init_mm.end_code = (unsigned long) _etext;
	564	init_mm.end_data = (unsigned long) _edata;
	565	init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
	566
	567	code_resource.start = virt_to_phys(_text);
	568	code_resource.end = virt_to_phys(_etext)-1;
	569	data_resource.start = virt_to_phys(_etext);
	570	data_resource.end = virt_to_phys(_edata)-1;
	571
1a3f239d	572	parse_early_param();
1da177e4	573
1a3f239d RR	574	if (user_defined_memmap) {
	575	printk(KERN_INFO "user-defined physical RAM map:\n");
	576	print_memory_map("user");
99b7de33	577	}
1a3f239d RR	578
	579	strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
	580	*cmdline_p = command_line;
99b7de33	581
1da177e4 LT	582	max_low_pfn = setup_memory();
	583
	584	/*
	585	* NOTE: before this point _nobody_ is allowed to allocate
	586	* any memory using the bootmem allocator. Although the
	587	* alloctor is now initialised only the first 8Mb of the kernel
	588	* virtual address space has been mapped. All allocations before
	589	* paging_init() has completed must use the alloc_bootmem_low_pages()
	590	* variant (which allocates DMA'able memory) and care must be taken
	591	* not to exceed the 8Mb limit.
	592	*/
	593
	594	#ifdef CONFIG_SMP
	595	smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
	596	#endif
	597	paging_init();
	598	remapped_pgdat_init();
05b79bdc	599	sparse_init();
1da177e4 LT	600	zone_sizes_init();
	601
	602	/*
	603	* NOTE: at this point the bootmem allocator is fully available.
	604	*/
	605
1da177e4 LT	606	dmi_scan_machine();
	607
	608	#ifdef CONFIG_X86_GENERICARCH
1a3f239d	609	generic_apic_probe();
1da177e4 LT	610	#endif
	611	if (efi_enabled)
	612	efi_map_memmap();
	613
888ba6c6	614	#ifdef CONFIG_ACPI
1da177e4 LT	615	/*
	616	* Parse the ACPI tables for possible boot-time SMP configuration.
	617	*/
	618	acpi_boot_table_init();
d44647b0 AC	619	#endif
d44647b0 AC	620
f157cbb1	621	#ifdef CONFIG_PCI
d44647b0 AC	622	#ifdef CONFIG_X86_IO_APIC
	623	check_acpi_pci(); /* Checks more than just ACPI actually */
	624	#endif
f157cbb1	625	#endif
d44647b0 AC	626
d44647b0 AC	627	#ifdef CONFIG_ACPI
1da177e4 LT	628	acpi_boot_init();
1da177e4 LT	629
911a62d4 VP	630	#if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
	631	if (def_to_bigsmp)
	632	printk(KERN_WARNING "More than 8 CPUs detected and "
	633	"CONFIG_X86_PC cannot handle it.\nUse "
	634	"CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
	635	#endif
	636	#endif
1da177e4 LT	637	#ifdef CONFIG_X86_LOCAL_APIC
	638	if (smp_found_config)
	639	get_smp_config();
	640	#endif
	641
	642	register_memory();
	643
	644	#ifdef CONFIG_VT
	645	#if defined(CONFIG_VGA_CONSOLE)
	646	if (!efi_enabled \|\| (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
	647	conswitchp = &vga_con;
	648	#elif defined(CONFIG_DUMMY_CONSOLE)
	649	conswitchp = &dummy_con;
	650	#endif
	651	#endif
539eb11e	652	tsc_init();
1da177e4 LT	653	}
1da177e4 LT	654
e5c6c8e4 MN	655	static __init int add_pcspkr(void)
	656	{
	657	struct platform_device *pd;
	658	int ret;
	659
	660	pd = platform_device_alloc("pcspkr", -1);
	661	if (!pd)
	662	return -ENOMEM;
	663
	664	ret = platform_device_add(pd);
	665	if (ret)
	666	platform_device_put(pd);
	667
	668	return ret;
	669	}
	670	device_initcall(add_pcspkr);
	671
1da177e4 LT	672	/*
	673	* Local Variables:
	674	* mode:c
	675	* c-file-style:"k&r"
	676	* c-basic-offset:8
	677	* End:
	678	*/