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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 
i386_default_early_setup(void)23 static 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 
i386_start_kernel(void)32 asmlinkage __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 }
52