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xianfeng |
/*
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* Copyright (C) 1995 Linus Torvalds
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*
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* Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
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*
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* Memory region support
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* David Parsons <orc@pell.chi.il.us>, July-August 1999
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*
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* Added E820 sanitization routine (removes overlapping memory regions);
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* Brian Moyle <bmoyle@mvista.com>, February 2001
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*
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* Moved CPU detection code to cpu/${cpu}.c
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* Patrick Mochel <mochel@osdl.org>, March 2002
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*
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* Provisions for empty E820 memory regions (reported by certain BIOSes).
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* Alex Achenbach <xela@slit.de>, December 2002.
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*
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*/
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/*
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* This file handles the architecture-dependent parts of initialization
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*/
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/mmzone.h>
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#include <linux/screen_info.h>
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#include <linux/ioport.h>
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#include <linux/acpi.h>
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#include <linux/apm_bios.h>
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#include <linux/initrd.h>
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#include <linux/bootmem.h>
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#include <linux/seq_file.h>
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#include <linux/console.h>
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#include <linux/mca.h>
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#include <linux/root_dev.h>
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#include <linux/highmem.h>
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#include <linux/module.h>
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#include <linux/efi.h>
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#include <linux/init.h>
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#include <linux/edd.h>
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#include <linux/nodemask.h>
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#include <linux/kexec.h>
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#include <linux/crash_dump.h>
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#include <linux/dmi.h>
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#include <linux/pfn.h>
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#include <video/edid.h>
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#include <asm/apic.h>
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#include <asm/e820.h>
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#include <asm/mpspec.h>
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#include <asm/mmzone.h>
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#include <asm/setup.h>
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#include <asm/arch_hooks.h>
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#include <asm/sections.h>
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#include <asm/io_apic.h>
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#include <asm/ist.h>
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#include <asm/io.h>
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#include <asm/vmi.h>
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#include <setup_arch.h>
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#include <bios_ebda.h>
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#include <asm/cacheflush.h>
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/* This value is set up by the early boot code to point to the value
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immediately after the boot time page tables. It contains a *physical*
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address, and must not be in the .bss segment! */
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unsigned long init_pg_tables_end __initdata = ~0UL;
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int disable_pse __cpuinitdata = 0;
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/*
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* Machine setup..
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*/
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extern struct resource code_resource;
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extern struct resource data_resource;
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extern struct resource bss_resource;
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/* cpu data as detected by the assembly code in head.S */
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struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
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/* common cpu data for all cpus */
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struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
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EXPORT_SYMBOL(boot_cpu_data);
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unsigned long mmu_cr4_features;
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/* for MCA, but anyone else can use it if they want */
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unsigned int machine_id;
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unsigned int machine_submodel_id;
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unsigned int BIOS_revision;
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unsigned int mca_pentium_flag;
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/* Boot loader ID as an integer, for the benefit of proc_dointvec */
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int bootloader_type;
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/* user-defined highmem size */
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static unsigned int highmem_pages = -1;
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/*
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* Setup options
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*/
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struct screen_info screen_info;
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EXPORT_SYMBOL(screen_info);
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struct apm_info apm_info;
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EXPORT_SYMBOL(apm_info);
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struct edid_info edid_info;
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EXPORT_SYMBOL_GPL(edid_info);
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struct ist_info ist_info;
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#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
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defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
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EXPORT_SYMBOL(ist_info);
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#endif
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extern void early_cpu_init(void);
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extern int root_mountflags;
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unsigned long saved_videomode;
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#define RAMDISK_IMAGE_START_MASK 0x07FF
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#define RAMDISK_PROMPT_FLAG 0x8000
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#define RAMDISK_LOAD_FLAG 0x4000
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static char __initdata command_line[COMMAND_LINE_SIZE];
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struct boot_params __initdata boot_params;
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#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
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struct edd edd;
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#ifdef CONFIG_EDD_MODULE
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EXPORT_SYMBOL(edd);
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#endif
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/**
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* copy_edd() - Copy the BIOS EDD information
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* from boot_params into a safe place.
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*
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*/
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static inline void copy_edd(void)
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{
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memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
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sizeof(edd.mbr_signature));
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memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
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edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
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edd.edd_info_nr = boot_params.eddbuf_entries;
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}
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#else
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static inline void copy_edd(void)
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{
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}
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#endif
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int __initdata user_defined_memmap = 0;
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/*
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* "mem=nopentium" disables the 4MB page tables.
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* "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
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* to <mem>, overriding the bios size.
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* "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
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* <start> to <start>+<mem>, overriding the bios size.
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*
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* HPA tells me bootloaders need to parse mem=, so no new
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* option should be mem= [also see Documentation/i386/boot.txt]
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*/
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static int __init parse_mem(char *arg)
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{
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if (!arg)
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return -EINVAL;
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if (strcmp(arg, "nopentium") == 0) {
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clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
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disable_pse = 1;
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} else {
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/* If the user specifies memory size, we
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* limit the BIOS-provided memory map to
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* that size. exactmap can be used to specify
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* the exact map. mem=number can be used to
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* trim the existing memory map.
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*/
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unsigned long long mem_size;
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mem_size = memparse(arg, &arg);
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limit_regions(mem_size);
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user_defined_memmap = 1;
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}
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return 0;
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}
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early_param("mem", parse_mem);
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#ifdef CONFIG_PROC_VMCORE
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/* elfcorehdr= specifies the location of elf core header
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* stored by the crashed kernel.
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*/
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static int __init parse_elfcorehdr(char *arg)
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{
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if (!arg)
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return -EINVAL;
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elfcorehdr_addr = memparse(arg, &arg);
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return 0;
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}
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early_param("elfcorehdr", parse_elfcorehdr);
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#endif /* CONFIG_PROC_VMCORE */
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/*
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* highmem=size forces highmem to be exactly 'size' bytes.
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* This works even on boxes that have no highmem otherwise.
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* This also works to reduce highmem size on bigger boxes.
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*/
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static int __init parse_highmem(char *arg)
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{
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if (!arg)
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return -EINVAL;
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highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
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return 0;
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}
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early_param("highmem", parse_highmem);
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/*
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* vmalloc=size forces the vmalloc area to be exactly 'size'
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* bytes. This can be used to increase (or decrease) the
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* vmalloc area - the default is 128m.
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*/
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static int __init parse_vmalloc(char *arg)
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{
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if (!arg)
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return -EINVAL;
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__VMALLOC_RESERVE = memparse(arg, &arg);
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return 0;
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}
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early_param("vmalloc", parse_vmalloc);
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/*
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* reservetop=size reserves a hole at the top of the kernel address space which
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* a hypervisor can load into later. Needed for dynamically loaded hypervisors,
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* so relocating the fixmap can be done before paging initialization.
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*/
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static int __init parse_reservetop(char *arg)
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{
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unsigned long address;
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if (!arg)
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return -EINVAL;
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address = memparse(arg, &arg);
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reserve_top_address(address);
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return 0;
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}
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early_param("reservetop", parse_reservetop);
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/*
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* Determine low and high memory ranges:
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*/
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unsigned long __init find_max_low_pfn(void)
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{
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unsigned long max_low_pfn;
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max_low_pfn = max_pfn;
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if (max_low_pfn > MAXMEM_PFN) {
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if (highmem_pages == -1)
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highmem_pages = max_pfn - MAXMEM_PFN;
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if (highmem_pages + MAXMEM_PFN < max_pfn)
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max_pfn = MAXMEM_PFN + highmem_pages;
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if (highmem_pages + MAXMEM_PFN > max_pfn) {
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printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages));
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highmem_pages = 0;
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}
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max_low_pfn = MAXMEM_PFN;
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#ifndef CONFIG_HIGHMEM
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/* Maximum memory usable is what is directly addressable */
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printk(KERN_WARNING "Warning only %ldMB will be used.\n",
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MAXMEM>>20);
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if (max_pfn > MAX_NONPAE_PFN)
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printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
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else
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printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
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max_pfn = MAXMEM_PFN;
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#else /* !CONFIG_HIGHMEM */
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#ifndef CONFIG_HIGHMEM64G
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if (max_pfn > MAX_NONPAE_PFN) {
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max_pfn = MAX_NONPAE_PFN;
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printk(KERN_WARNING "Warning only 4GB will be used.\n");
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printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
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}
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#endif /* !CONFIG_HIGHMEM64G */
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#endif /* !CONFIG_HIGHMEM */
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} else {
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if (highmem_pages == -1)
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highmem_pages = 0;
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#ifdef CONFIG_HIGHMEM
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if (highmem_pages >= max_pfn) {
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printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn));
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highmem_pages = 0;
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}
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295 |
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if (highmem_pages) {
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if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){
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printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages));
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highmem_pages = 0;
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}
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max_low_pfn -= highmem_pages;
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}
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#else
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if (highmem_pages)
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printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n");
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#endif
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}
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return max_low_pfn;
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}
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309 |
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310 |
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/*
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311 |
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* workaround for Dell systems that neglect to reserve EBDA
|
312 |
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*/
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313 |
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static void __init reserve_ebda_region(void)
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314 |
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{
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315 |
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unsigned int addr;
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316 |
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addr = get_bios_ebda();
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317 |
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if (addr)
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318 |
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reserve_bootmem(addr, PAGE_SIZE);
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319 |
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}
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320 |
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321 |
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#ifndef CONFIG_NEED_MULTIPLE_NODES
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322 |
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void __init setup_bootmem_allocator(void);
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323 |
|
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static unsigned long __init setup_memory(void)
|
324 |
|
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{
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325 |
|
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/*
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326 |
|
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* partially used pages are not usable - thus
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327 |
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* we are rounding upwards:
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328 |
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*/
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329 |
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min_low_pfn = PFN_UP(init_pg_tables_end);
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330 |
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find_max_pfn();
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332 |
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333 |
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max_low_pfn = find_max_low_pfn();
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334 |
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335 |
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#ifdef CONFIG_HIGHMEM
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336 |
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highstart_pfn = highend_pfn = max_pfn;
|
337 |
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if (max_pfn > max_low_pfn) {
|
338 |
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highstart_pfn = max_low_pfn;
|
339 |
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}
|
340 |
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printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
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341 |
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pages_to_mb(highend_pfn - highstart_pfn));
|
342 |
|
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num_physpages = highend_pfn;
|
343 |
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high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
|
344 |
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#else
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345 |
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num_physpages = max_low_pfn;
|
346 |
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high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
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347 |
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#endif
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348 |
|
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#ifdef CONFIG_FLATMEM
|
349 |
|
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max_mapnr = num_physpages;
|
350 |
|
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#endif
|
351 |
|
|
printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
|
352 |
|
|
pages_to_mb(max_low_pfn));
|
353 |
|
|
|
354 |
|
|
setup_bootmem_allocator();
|
355 |
|
|
|
356 |
|
|
return max_low_pfn;
|
357 |
|
|
}
|
358 |
|
|
|
359 |
|
|
void __init zone_sizes_init(void)
|
360 |
|
|
{
|
361 |
|
|
unsigned long max_zone_pfns[MAX_NR_ZONES];
|
362 |
|
|
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
|
363 |
|
|
max_zone_pfns[ZONE_DMA] =
|
364 |
|
|
virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
|
365 |
|
|
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
|
366 |
|
|
#ifdef CONFIG_HIGHMEM
|
367 |
|
|
max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
|
368 |
|
|
add_active_range(0, 0, highend_pfn);
|
369 |
|
|
#else
|
370 |
|
|
add_active_range(0, 0, max_low_pfn);
|
371 |
|
|
#endif
|
372 |
|
|
|
373 |
|
|
free_area_init_nodes(max_zone_pfns);
|
374 |
|
|
}
|
375 |
|
|
#else
|
376 |
|
|
extern unsigned long __init setup_memory(void);
|
377 |
|
|
extern void zone_sizes_init(void);
|
378 |
|
|
#endif /* !CONFIG_NEED_MULTIPLE_NODES */
|
379 |
|
|
|
380 |
|
|
static inline unsigned long long get_total_mem(void)
|
381 |
|
|
{
|
382 |
|
|
unsigned long long total;
|
383 |
|
|
|
384 |
|
|
total = max_low_pfn - min_low_pfn;
|
385 |
|
|
#ifdef CONFIG_HIGHMEM
|
386 |
|
|
total += highend_pfn - highstart_pfn;
|
387 |
|
|
#endif
|
388 |
|
|
|
389 |
|
|
return total << PAGE_SHIFT;
|
390 |
|
|
}
|
391 |
|
|
|
392 |
|
|
#ifdef CONFIG_KEXEC
|
393 |
|
|
static void __init reserve_crashkernel(void)
|
394 |
|
|
{
|
395 |
|
|
unsigned long long total_mem;
|
396 |
|
|
unsigned long long crash_size, crash_base;
|
397 |
|
|
int ret;
|
398 |
|
|
|
399 |
|
|
total_mem = get_total_mem();
|
400 |
|
|
|
401 |
|
|
ret = parse_crashkernel(boot_command_line, total_mem,
|
402 |
|
|
&crash_size, &crash_base);
|
403 |
|
|
if (ret == 0 && crash_size > 0) {
|
404 |
|
|
if (crash_base > 0) {
|
405 |
|
|
printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
|
406 |
|
|
"for crashkernel (System RAM: %ldMB)\n",
|
407 |
|
|
(unsigned long)(crash_size >> 20),
|
408 |
|
|
(unsigned long)(crash_base >> 20),
|
409 |
|
|
(unsigned long)(total_mem >> 20));
|
410 |
|
|
crashk_res.start = crash_base;
|
411 |
|
|
crashk_res.end = crash_base + crash_size - 1;
|
412 |
|
|
reserve_bootmem(crash_base, crash_size);
|
413 |
|
|
} else
|
414 |
|
|
printk(KERN_INFO "crashkernel reservation failed - "
|
415 |
|
|
"you have to specify a base address\n");
|
416 |
|
|
}
|
417 |
|
|
}
|
418 |
|
|
#else
|
419 |
|
|
static inline void __init reserve_crashkernel(void)
|
420 |
|
|
{}
|
421 |
|
|
#endif
|
422 |
|
|
|
423 |
|
|
void __init setup_bootmem_allocator(void)
|
424 |
|
|
{
|
425 |
|
|
unsigned long bootmap_size;
|
426 |
|
|
/*
|
427 |
|
|
* Initialize the boot-time allocator (with low memory only):
|
428 |
|
|
*/
|
429 |
|
|
bootmap_size = init_bootmem(min_low_pfn, max_low_pfn);
|
430 |
|
|
|
431 |
|
|
register_bootmem_low_pages(max_low_pfn);
|
432 |
|
|
|
433 |
|
|
/*
|
434 |
|
|
* Reserve the bootmem bitmap itself as well. We do this in two
|
435 |
|
|
* steps (first step was init_bootmem()) because this catches
|
436 |
|
|
* the (very unlikely) case of us accidentally initializing the
|
437 |
|
|
* bootmem allocator with an invalid RAM area.
|
438 |
|
|
*/
|
439 |
|
|
reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
|
440 |
|
|
bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text));
|
441 |
|
|
|
442 |
|
|
/*
|
443 |
|
|
* reserve physical page 0 - it's a special BIOS page on many boxes,
|
444 |
|
|
* enabling clean reboots, SMP operation, laptop functions.
|
445 |
|
|
*/
|
446 |
|
|
reserve_bootmem(0, PAGE_SIZE);
|
447 |
|
|
|
448 |
|
|
/* reserve EBDA region, it's a 4K region */
|
449 |
|
|
reserve_ebda_region();
|
450 |
|
|
|
451 |
|
|
/* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent
|
452 |
|
|
PCI prefetch into it (errata #56). Usually the page is reserved anyways,
|
453 |
|
|
unless you have no PS/2 mouse plugged in. */
|
454 |
|
|
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
|
455 |
|
|
boot_cpu_data.x86 == 6)
|
456 |
|
|
reserve_bootmem(0xa0000 - 4096, 4096);
|
457 |
|
|
|
458 |
|
|
#ifdef CONFIG_SMP
|
459 |
|
|
/*
|
460 |
|
|
* But first pinch a few for the stack/trampoline stuff
|
461 |
|
|
* FIXME: Don't need the extra page at 4K, but need to fix
|
462 |
|
|
* trampoline before removing it. (see the GDT stuff)
|
463 |
|
|
*/
|
464 |
|
|
reserve_bootmem(PAGE_SIZE, PAGE_SIZE);
|
465 |
|
|
#endif
|
466 |
|
|
#ifdef CONFIG_ACPI_SLEEP
|
467 |
|
|
/*
|
468 |
|
|
* Reserve low memory region for sleep support.
|
469 |
|
|
*/
|
470 |
|
|
acpi_reserve_bootmem();
|
471 |
|
|
#endif
|
472 |
|
|
#ifdef CONFIG_X86_FIND_SMP_CONFIG
|
473 |
|
|
/*
|
474 |
|
|
* Find and reserve possible boot-time SMP configuration:
|
475 |
|
|
*/
|
476 |
|
|
find_smp_config();
|
477 |
|
|
#endif
|
478 |
|
|
numa_kva_reserve();
|
479 |
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
480 |
|
|
if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
|
481 |
|
|
unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
|
482 |
|
|
unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
|
483 |
|
|
unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
|
484 |
|
|
unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
|
485 |
|
|
|
486 |
|
|
if (ramdisk_end <= end_of_lowmem) {
|
487 |
|
|
reserve_bootmem(ramdisk_image, ramdisk_size);
|
488 |
|
|
initrd_start = ramdisk_image + PAGE_OFFSET;
|
489 |
|
|
initrd_end = initrd_start+ramdisk_size;
|
490 |
|
|
} else {
|
491 |
|
|
printk(KERN_ERR "initrd extends beyond end of memory "
|
492 |
|
|
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
|
493 |
|
|
ramdisk_end, end_of_lowmem);
|
494 |
|
|
initrd_start = 0;
|
495 |
|
|
}
|
496 |
|
|
}
|
497 |
|
|
#endif
|
498 |
|
|
reserve_crashkernel();
|
499 |
|
|
}
|
500 |
|
|
|
501 |
|
|
/*
|
502 |
|
|
* The node 0 pgdat is initialized before all of these because
|
503 |
|
|
* it's needed for bootmem. node>0 pgdats have their virtual
|
504 |
|
|
* space allocated before the pagetables are in place to access
|
505 |
|
|
* them, so they can't be cleared then.
|
506 |
|
|
*
|
507 |
|
|
* This should all compile down to nothing when NUMA is off.
|
508 |
|
|
*/
|
509 |
|
|
static void __init remapped_pgdat_init(void)
|
510 |
|
|
{
|
511 |
|
|
int nid;
|
512 |
|
|
|
513 |
|
|
for_each_online_node(nid) {
|
514 |
|
|
if (nid != 0)
|
515 |
|
|
memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
|
516 |
|
|
}
|
517 |
|
|
}
|
518 |
|
|
|
519 |
|
|
#ifdef CONFIG_MCA
|
520 |
|
|
static void set_mca_bus(int x)
|
521 |
|
|
{
|
522 |
|
|
MCA_bus = x;
|
523 |
|
|
}
|
524 |
|
|
#else
|
525 |
|
|
static void set_mca_bus(int x) { }
|
526 |
|
|
#endif
|
527 |
|
|
|
528 |
|
|
/* Overridden in paravirt.c if CONFIG_PARAVIRT */
|
529 |
|
|
char * __init __attribute__((weak)) memory_setup(void)
|
530 |
|
|
{
|
531 |
|
|
return machine_specific_memory_setup();
|
532 |
|
|
}
|
533 |
|
|
|
534 |
|
|
/*
|
535 |
|
|
* Determine if we were loaded by an EFI loader. If so, then we have also been
|
536 |
|
|
* passed the efi memmap, systab, etc., so we should use these data structures
|
537 |
|
|
* for initialization. Note, the efi init code path is determined by the
|
538 |
|
|
* global efi_enabled. This allows the same kernel image to be used on existing
|
539 |
|
|
* systems (with a traditional BIOS) as well as on EFI systems.
|
540 |
|
|
*/
|
541 |
|
|
void __init setup_arch(char **cmdline_p)
|
542 |
|
|
{
|
543 |
|
|
unsigned long max_low_pfn;
|
544 |
|
|
|
545 |
|
|
memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
|
546 |
|
|
pre_setup_arch_hook();
|
547 |
|
|
early_cpu_init();
|
548 |
|
|
|
549 |
|
|
/*
|
550 |
|
|
* FIXME: This isn't an official loader_type right
|
551 |
|
|
* now but does currently work with elilo.
|
552 |
|
|
* If we were configured as an EFI kernel, check to make
|
553 |
|
|
* sure that we were loaded correctly from elilo and that
|
554 |
|
|
* the system table is valid. If not, then initialize normally.
|
555 |
|
|
*/
|
556 |
|
|
#ifdef CONFIG_EFI
|
557 |
|
|
if ((boot_params.hdr.type_of_loader == 0x50) &&
|
558 |
|
|
boot_params.efi_info.efi_systab)
|
559 |
|
|
efi_enabled = 1;
|
560 |
|
|
#endif
|
561 |
|
|
|
562 |
|
|
ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
|
563 |
|
|
screen_info = boot_params.screen_info;
|
564 |
|
|
edid_info = boot_params.edid_info;
|
565 |
|
|
apm_info.bios = boot_params.apm_bios_info;
|
566 |
|
|
ist_info = boot_params.ist_info;
|
567 |
|
|
saved_videomode = boot_params.hdr.vid_mode;
|
568 |
|
|
if( boot_params.sys_desc_table.length != 0 ) {
|
569 |
|
|
set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
|
570 |
|
|
machine_id = boot_params.sys_desc_table.table[0];
|
571 |
|
|
machine_submodel_id = boot_params.sys_desc_table.table[1];
|
572 |
|
|
BIOS_revision = boot_params.sys_desc_table.table[2];
|
573 |
|
|
}
|
574 |
|
|
bootloader_type = boot_params.hdr.type_of_loader;
|
575 |
|
|
|
576 |
|
|
#ifdef CONFIG_BLK_DEV_RAM
|
577 |
|
|
rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
|
578 |
|
|
rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
|
579 |
|
|
rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
|
580 |
|
|
#endif
|
581 |
|
|
ARCH_SETUP
|
582 |
|
|
if (efi_enabled)
|
583 |
|
|
efi_init();
|
584 |
|
|
else {
|
585 |
|
|
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
|
586 |
|
|
print_memory_map(memory_setup());
|
587 |
|
|
}
|
588 |
|
|
|
589 |
|
|
copy_edd();
|
590 |
|
|
|
591 |
|
|
if (!boot_params.hdr.root_flags)
|
592 |
|
|
root_mountflags &= ~MS_RDONLY;
|
593 |
|
|
init_mm.start_code = (unsigned long) _text;
|
594 |
|
|
init_mm.end_code = (unsigned long) _etext;
|
595 |
|
|
init_mm.end_data = (unsigned long) _edata;
|
596 |
|
|
init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
|
597 |
|
|
|
598 |
|
|
code_resource.start = virt_to_phys(_text);
|
599 |
|
|
code_resource.end = virt_to_phys(_etext)-1;
|
600 |
|
|
data_resource.start = virt_to_phys(_etext);
|
601 |
|
|
data_resource.end = virt_to_phys(_edata)-1;
|
602 |
|
|
bss_resource.start = virt_to_phys(&__bss_start);
|
603 |
|
|
bss_resource.end = virt_to_phys(&__bss_stop)-1;
|
604 |
|
|
|
605 |
|
|
parse_early_param();
|
606 |
|
|
|
607 |
|
|
if (user_defined_memmap) {
|
608 |
|
|
printk(KERN_INFO "user-defined physical RAM map:\n");
|
609 |
|
|
print_memory_map("user");
|
610 |
|
|
}
|
611 |
|
|
|
612 |
|
|
strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
|
613 |
|
|
*cmdline_p = command_line;
|
614 |
|
|
|
615 |
|
|
max_low_pfn = setup_memory();
|
616 |
|
|
|
617 |
|
|
#ifdef CONFIG_VMI
|
618 |
|
|
/*
|
619 |
|
|
* Must be after max_low_pfn is determined, and before kernel
|
620 |
|
|
* pagetables are setup.
|
621 |
|
|
*/
|
622 |
|
|
vmi_init();
|
623 |
|
|
#endif
|
624 |
|
|
|
625 |
|
|
/*
|
626 |
|
|
* NOTE: before this point _nobody_ is allowed to allocate
|
627 |
|
|
* any memory using the bootmem allocator. Although the
|
628 |
|
|
* allocator is now initialised only the first 8Mb of the kernel
|
629 |
|
|
* virtual address space has been mapped. All allocations before
|
630 |
|
|
* paging_init() has completed must use the alloc_bootmem_low_pages()
|
631 |
|
|
* variant (which allocates DMA'able memory) and care must be taken
|
632 |
|
|
* not to exceed the 8Mb limit.
|
633 |
|
|
*/
|
634 |
|
|
|
635 |
|
|
#ifdef CONFIG_SMP
|
636 |
|
|
smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
|
637 |
|
|
#endif
|
638 |
|
|
paging_init();
|
639 |
|
|
remapped_pgdat_init();
|
640 |
|
|
sparse_init();
|
641 |
|
|
zone_sizes_init();
|
642 |
|
|
|
643 |
|
|
/*
|
644 |
|
|
* NOTE: at this point the bootmem allocator is fully available.
|
645 |
|
|
*/
|
646 |
|
|
|
647 |
|
|
paravirt_post_allocator_init();
|
648 |
|
|
|
649 |
|
|
dmi_scan_machine();
|
650 |
|
|
|
651 |
|
|
#ifdef CONFIG_X86_GENERICARCH
|
652 |
|
|
generic_apic_probe();
|
653 |
|
|
#endif
|
654 |
|
|
if (efi_enabled)
|
655 |
|
|
efi_map_memmap();
|
656 |
|
|
|
657 |
|
|
#ifdef CONFIG_ACPI
|
658 |
|
|
/*
|
659 |
|
|
* Parse the ACPI tables for possible boot-time SMP configuration.
|
660 |
|
|
*/
|
661 |
|
|
acpi_boot_table_init();
|
662 |
|
|
#endif
|
663 |
|
|
|
664 |
|
|
#ifdef CONFIG_PCI
|
665 |
|
|
early_quirks();
|
666 |
|
|
#endif
|
667 |
|
|
|
668 |
|
|
#ifdef CONFIG_ACPI
|
669 |
|
|
acpi_boot_init();
|
670 |
|
|
|
671 |
|
|
#if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
|
672 |
|
|
if (def_to_bigsmp)
|
673 |
|
|
printk(KERN_WARNING "More than 8 CPUs detected and "
|
674 |
|
|
"CONFIG_X86_PC cannot handle it.\nUse "
|
675 |
|
|
"CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
|
676 |
|
|
#endif
|
677 |
|
|
#endif
|
678 |
|
|
#ifdef CONFIG_X86_LOCAL_APIC
|
679 |
|
|
if (smp_found_config)
|
680 |
|
|
get_smp_config();
|
681 |
|
|
#endif
|
682 |
|
|
|
683 |
|
|
e820_register_memory();
|
684 |
|
|
e820_mark_nosave_regions();
|
685 |
|
|
|
686 |
|
|
#ifdef CONFIG_VT
|
687 |
|
|
#if defined(CONFIG_VGA_CONSOLE)
|
688 |
|
|
if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
|
689 |
|
|
conswitchp = &vga_con;
|
690 |
|
|
#elif defined(CONFIG_DUMMY_CONSOLE)
|
691 |
|
|
conswitchp = &dummy_con;
|
692 |
|
|
#endif
|
693 |
|
|
#endif
|
694 |
|
|
}
|