forked from luck/tmp_suning_uos_patched
08afc7c0dd
So remove outdated comments Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
535 lines
13 KiB
C
535 lines
13 KiB
C
/*
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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/iscsi_ibft.h>
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#include <linux/nodemask.h>
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#include <linux/kexec.h>
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#include <linux/dmi.h>
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#include <linux/pfn.h>
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#include <linux/pci.h>
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#include <linux/init_ohci1394_dma.h>
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#include <linux/kvm_para.h>
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#include <video/edid.h>
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#include <asm/mtrr.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/dmi.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 <asm/bios_ebda.h>
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#include <asm/cacheflush.h>
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#include <asm/processor.h>
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#include <asm/efi.h>
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#include <asm/bugs.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_start __initdata = ~0UL;
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unsigned long init_pg_tables_end __initdata = ~0UL;
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/*
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* Machine setup..
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*/
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static struct resource data_resource = {
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.name = "Kernel data",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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static struct resource code_resource = {
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.name = "Kernel code",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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static struct resource bss_resource = {
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.name = "Kernel bss",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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static struct resource video_ram_resource = {
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.name = "Video RAM area",
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.start = 0xa0000,
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.end = 0xbffff,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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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 int def_to_bigsmp;
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#ifndef CONFIG_X86_PAE
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unsigned long mmu_cr4_features;
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#else
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unsigned long mmu_cr4_features = X86_CR4_PAE;
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#endif
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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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/* Boot loader ID as an integer, for the benefit of proc_dointvec */
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int bootloader_type;
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/*
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* Early DMI memory
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*/
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int dmi_alloc_index;
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char dmi_alloc_data[DMI_MAX_DATA];
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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 int root_mountflags;
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unsigned long saved_video_mode;
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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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#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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#ifdef CONFIG_BLK_DEV_INITRD
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static void __init relocate_initrd(void);
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static void __init reserve_initrd(void)
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{
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u64 ramdisk_image = boot_params.hdr.ramdisk_image;
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u64 ramdisk_size = boot_params.hdr.ramdisk_size;
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u64 ramdisk_end = ramdisk_image + ramdisk_size;
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u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
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u64 ramdisk_here;
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if (!boot_params.hdr.type_of_loader ||
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!ramdisk_image || !ramdisk_size)
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return; /* No initrd provided by bootloader */
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initrd_start = 0;
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if (ramdisk_size >= (end_of_lowmem>>1)) {
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free_early(ramdisk_image, ramdisk_end);
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printk(KERN_ERR "initrd too large to handle, "
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"disabling initrd\n");
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return;
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}
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printk(KERN_INFO "old RAMDISK: %08llx - %08llx\n", ramdisk_image,
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ramdisk_end);
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if (ramdisk_end <= end_of_lowmem) {
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/* All in lowmem, easy case */
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/*
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* don't need to reserve again, already reserved early
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* in i386_start_kernel
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*/
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initrd_start = ramdisk_image + PAGE_OFFSET;
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initrd_end = initrd_start + ramdisk_size;
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return;
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}
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/* We need to move the initrd down into lowmem */
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ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size,
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PAGE_SIZE);
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if (ramdisk_here == -1ULL)
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panic("Cannot find place for new RAMDISK of size %lld\n",
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ramdisk_size);
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/* Note: this includes all the lowmem currently occupied by
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the initrd, we rely on that fact to keep the data intact. */
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reserve_early(ramdisk_here, ramdisk_here + ramdisk_size,
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"NEW RAMDISK");
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initrd_start = ramdisk_here + PAGE_OFFSET;
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initrd_end = initrd_start + ramdisk_size;
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printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
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ramdisk_here, ramdisk_here + ramdisk_size);
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relocate_initrd();
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}
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#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
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static void __init relocate_initrd(void)
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{
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u64 ramdisk_image = boot_params.hdr.ramdisk_image;
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u64 ramdisk_size = boot_params.hdr.ramdisk_size;
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u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
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u64 ramdisk_here;
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unsigned long slop, clen, mapaddr;
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char *p, *q;
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ramdisk_here = initrd_start - PAGE_OFFSET;
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q = (char *)initrd_start;
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/* Copy any lowmem portion of the initrd */
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if (ramdisk_image < end_of_lowmem) {
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clen = end_of_lowmem - ramdisk_image;
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p = (char *)__va(ramdisk_image);
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memcpy(q, p, clen);
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q += clen;
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ramdisk_image += clen;
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ramdisk_size -= clen;
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}
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/* Copy the highmem portion of the initrd */
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while (ramdisk_size) {
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slop = ramdisk_image & ~PAGE_MASK;
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clen = ramdisk_size;
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if (clen > MAX_MAP_CHUNK-slop)
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clen = MAX_MAP_CHUNK-slop;
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mapaddr = ramdisk_image & PAGE_MASK;
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p = early_ioremap(mapaddr, clen+slop);
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memcpy(q, p+slop, clen);
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early_iounmap(p, clen+slop);
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q += clen;
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ramdisk_image += clen;
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ramdisk_size -= clen;
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}
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/* high pages is not converted by early_res_to_bootmem */
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ramdisk_image = boot_params.hdr.ramdisk_image;
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ramdisk_size = boot_params.hdr.ramdisk_size;
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printk(KERN_INFO "Copied RAMDISK from %016llx - %016llx to %08llx - %08llx\n",
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ramdisk_image, ramdisk_image + ramdisk_size - 1,
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ramdisk_here, ramdisk_here + ramdisk_size - 1);
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/*
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* need to free old one, otherwise init cross max_low_pfn could be
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* converted to bootmem
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*/
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free_early(ramdisk_image, ramdisk_image+ramdisk_size);
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}
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#else
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void __init reserve_initrd(void)
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{
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}
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#endif /* CONFIG_BLK_DEV_INITRD */
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#ifdef CONFIG_MCA
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static void set_mca_bus(int x)
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{
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MCA_bus = x;
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}
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#else
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static void set_mca_bus(int x) { }
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#endif
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/*
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* Determine if we were loaded by an EFI loader. If so, then we have also been
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* passed the efi memmap, systab, etc., so we should use these data structures
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* for initialization. Note, the efi init code path is determined by the
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* global efi_enabled. This allows the same kernel image to be used on existing
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* systems (with a traditional BIOS) as well as on EFI systems.
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*/
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void __init setup_arch(char **cmdline_p)
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{
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memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
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pre_setup_arch_hook();
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early_cpu_init();
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early_ioremap_init();
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reserve_setup_data();
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ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
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screen_info = boot_params.screen_info;
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edid_info = boot_params.edid_info;
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apm_info.bios = boot_params.apm_bios_info;
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ist_info = boot_params.ist_info;
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saved_video_mode = boot_params.hdr.vid_mode;
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if( boot_params.sys_desc_table.length != 0 ) {
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set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
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machine_id = boot_params.sys_desc_table.table[0];
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machine_submodel_id = boot_params.sys_desc_table.table[1];
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BIOS_revision = boot_params.sys_desc_table.table[2];
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}
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bootloader_type = boot_params.hdr.type_of_loader;
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#ifdef CONFIG_BLK_DEV_RAM
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rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
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rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
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rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
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#endif
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#ifdef CONFIG_EFI
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if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
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"EL32", 4)) {
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efi_enabled = 1;
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efi_reserve_early();
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}
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#endif
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ARCH_SETUP
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setup_memory_map();
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copy_edd();
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if (!boot_params.hdr.root_flags)
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root_mountflags &= ~MS_RDONLY;
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init_mm.start_code = (unsigned long) _text;
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init_mm.end_code = (unsigned long) _etext;
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init_mm.end_data = (unsigned long) _edata;
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init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
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code_resource.start = virt_to_phys(_text);
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code_resource.end = virt_to_phys(_etext)-1;
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data_resource.start = virt_to_phys(_etext);
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data_resource.end = virt_to_phys(_edata)-1;
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bss_resource.start = virt_to_phys(&__bss_start);
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bss_resource.end = virt_to_phys(&__bss_stop)-1;
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strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
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*cmdline_p = command_line;
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parse_setup_data();
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parse_early_param();
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if (acpi_mps_check()){
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#ifdef CONFIG_X86_LOCAL_APIC
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enable_local_apic = -1;
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#endif
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clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
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}
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finish_e820_parsing();
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probe_roms();
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/* after parse_early_param, so could debug it */
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insert_resource(&iomem_resource, &code_resource);
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insert_resource(&iomem_resource, &data_resource);
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insert_resource(&iomem_resource, &bss_resource);
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if (efi_enabled)
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efi_init();
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if (ppro_with_ram_bug()) {
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e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
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E820_RESERVED);
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sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
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printk(KERN_INFO "fixed physical RAM map:\n");
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e820_print_map("bad_ppro");
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}
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e820_register_active_regions(0, 0, -1UL);
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/*
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* partially used pages are not usable - thus
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* we are rounding upwards:
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*/
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max_pfn = e820_end_of_ram();
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/* preallocate 4k for mptable mpc */
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early_reserve_e820_mpc_new();
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/* update e820 for memory not covered by WB MTRRs */
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mtrr_bp_init();
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if (mtrr_trim_uncached_memory(max_pfn)) {
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remove_all_active_ranges();
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e820_register_active_regions(0, 0, -1UL);
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max_pfn = e820_end_of_ram();
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}
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/* max_low_pfn get updated here */
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find_low_pfn_range();
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/* max_pfn_mapped is updated here */
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max_pfn_mapped = init_memory_mapping(0, (max_low_pfn << PAGE_SHIFT));
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reserve_initrd();
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dmi_scan_machine();
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io_delay_init();
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/*
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* Parse the ACPI tables for possible boot-time SMP configuration.
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*/
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acpi_boot_table_init();
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#ifdef CONFIG_ACPI_NUMA
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/*
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* Parse SRAT to discover nodes.
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*/
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acpi_numa_init();
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#endif
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initmem_init(0, max_pfn);
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#ifdef CONFIG_ACPI_SLEEP
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/*
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* Reserve low memory region for sleep support.
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*/
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acpi_reserve_bootmem();
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#endif
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#ifdef CONFIG_X86_FIND_SMP_CONFIG
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/*
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* Find and reserve possible boot-time SMP configuration:
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*/
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find_smp_config();
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#endif
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reserve_crashkernel();
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reserve_ibft_region();
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#ifdef CONFIG_KVM_CLOCK
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kvmclock_init();
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#endif
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#ifdef CONFIG_VMI
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/*
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* Must be after max_low_pfn is determined, and before kernel
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* pagetables are setup.
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*/
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vmi_init();
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#endif
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paging_init();
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/*
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* NOTE: On x86-32, only from this point on, fixmaps are ready for use.
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*/
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#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
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if (init_ohci1394_dma_early)
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init_ohci1394_dma_on_all_controllers();
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#endif
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#ifdef CONFIG_X86_GENERICARCH
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generic_apic_probe();
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#endif
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early_quirks();
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/*
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* Read APIC and some other early information from ACPI tables.
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*/
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acpi_boot_init();
|
|
|
|
#if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
|
|
/*
|
|
* get boot-time SMP configuration:
|
|
*/
|
|
if (smp_found_config)
|
|
get_smp_config();
|
|
#endif
|
|
#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
|
|
kvm_guest_init();
|
|
|
|
e820_reserve_resources();
|
|
e820_mark_nosave_regions(max_low_pfn);
|
|
|
|
request_resource(&iomem_resource, &video_ram_resource);
|
|
reserve_standard_io_resources();
|
|
|
|
e820_setup_gap();
|
|
|
|
#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
|
|
}
|
|
|