74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/*
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* linux/arch/i386/kernel/head32.c -- prepare to run common code
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*
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* Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
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* Copyright (C) 2007 Eric Biederman <ebiederm@xmission.com>
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*/
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#include <linux/init.h>
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#include <linux/start_kernel.h>
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#include <linux/mm.h>
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#include <asm/setup.h>
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#include <asm/sections.h>
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#include <asm/e820.h>
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#include <asm/page.h>
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#include <asm/trampoline.h>
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#include <asm/apic.h>
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#include <asm/io_apic.h>
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#include <asm/bios_ebda.h>
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static void __init i386_default_early_setup(void)
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{
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/* Initilize 32bit specific setup functions */
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x86_init.resources.probe_roms = probe_roms;
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x86_init.resources.reserve_resources = i386_reserve_resources;
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x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc;
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reserve_ebda_region();
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}
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void __init i386_start_kernel(void)
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{
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#ifdef CONFIG_X86_TRAMPOLINE
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/*
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* But first pinch a few for the stack/trampoline stuff
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* FIXME: Don't need the extra page at 4K, but need to fix
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* trampoline before removing it. (see the GDT stuff)
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*/
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reserve_early_overlap_ok(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE,
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"EX TRAMPOLINE");
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#endif
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reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS");
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#ifdef CONFIG_BLK_DEV_INITRD
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/* Reserve INITRD */
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if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
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/* Assume only end is not page aligned */
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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 = PAGE_ALIGN(ramdisk_image + ramdisk_size);
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reserve_early(ramdisk_image, ramdisk_end, "RAMDISK");
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}
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#endif
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/* Call the subarch specific early setup function */
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switch (boot_params.hdr.hardware_subarch) {
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case X86_SUBARCH_MRST:
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x86_mrst_early_setup();
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break;
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default:
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i386_default_early_setup();
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break;
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}
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/*
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* At this point everything still needed from the boot loader
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* or BIOS or kernel text should be early reserved or marked not
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* RAM in e820. All other memory is free game.
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*/
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start_kernel();
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}
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