1/*
 2 *  linux/arch/i386/kernel/head32.c -- prepare to run common code
 3 *
 4 *  Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
 5 *  Copyright (C) 2007 Eric Biederman <ebiederm@xmission.com>
 6 */
 7
 8#include <linux/init.h>
 9#include <linux/start_kernel.h>
10#include <linux/mm.h>
11#include <linux/memblock.h>
12
13#include <asm/setup.h>
14#include <asm/sections.h>
15#include <asm/e820.h>
16#include <asm/page.h>
17#include <asm/apic.h>
18#include <asm/io_apic.h>
19#include <asm/bios_ebda.h>
20#include <asm/tlbflush.h>
 
21
22static void __init i386_default_early_setup(void)
23{
24	/* Initialize 32bit specific setup functions */
25	x86_init.resources.reserve_resources = i386_reserve_resources;
26	x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc;
27
28	reserve_ebda_region();
29}
30
31void __init i386_start_kernel(void)
32{
33	memblock_reserve(__pa_symbol(&_text),
34			 __pa_symbol(&__bss_stop) - __pa_symbol(&_text));
35
36#ifdef CONFIG_BLK_DEV_INITRD
37	/* Reserve INITRD */
38	if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
39		/* Assume only end is not page aligned */
40		u64 ramdisk_image = boot_params.hdr.ramdisk_image;
41		u64 ramdisk_size  = boot_params.hdr.ramdisk_size;
42		u64 ramdisk_end   = PAGE_ALIGN(ramdisk_image + ramdisk_size);
43		memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
44	}
45#endif
46
47	/* Call the subarch specific early setup function */
48	switch (boot_params.hdr.hardware_subarch) {
49	case X86_SUBARCH_MRST:
50		x86_mrst_early_setup();
51		break;
52	case X86_SUBARCH_CE4100:
53		x86_ce4100_early_setup();
54		break;
55	default:
56		i386_default_early_setup();
57		break;
58	}
59
60	/*
61	 * At this point everything still needed from the boot loader
62	 * or BIOS or kernel text should be early reserved or marked not
63	 * RAM in e820. All other memory is free game.
64	 */
65
66	start_kernel();
67}

 1/*
 2 *  linux/arch/i386/kernel/head32.c -- prepare to run common code
 3 *
 4 *  Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
 5 *  Copyright (C) 2007 Eric Biederman <ebiederm@xmission.com>
 6 */
 7
 8#include <linux/init.h>
 9#include <linux/start_kernel.h>
10#include <linux/mm.h>
11#include <linux/memblock.h>
12
13#include <asm/setup.h>
14#include <asm/sections.h>
15#include <asm/e820.h>
16#include <asm/page.h>
17#include <asm/apic.h>
18#include <asm/io_apic.h>
19#include <asm/bios_ebda.h>
20#include <asm/tlbflush.h>
21#include <asm/bootparam_utils.h>
22
23static void __init i386_default_early_setup(void)
24{
25	/* Initialize 32bit specific setup functions */
26	x86_init.resources.reserve_resources = i386_reserve_resources;
27	x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc;
28
29	reserve_ebda_region();
30}
31
32asmlinkage __visible void __init i386_start_kernel(void)
33{
34	cr4_init_shadow();
35	sanitize_boot_params(&boot_params);
 
 
 
 
 
 
 
 
 
 
 
36
37	/* Call the subarch specific early setup function */
38	switch (boot_params.hdr.hardware_subarch) {
39	case X86_SUBARCH_INTEL_MID:
40		x86_intel_mid_early_setup();
41		break;
42	case X86_SUBARCH_CE4100:
43		x86_ce4100_early_setup();
44		break;
45	default:
46		i386_default_early_setup();
47		break;
48	}
 
 
 
 
 
 
49
50	start_kernel();
51}