x86: Merge early kernel reserve for 32bit and 64bit
[linux-3.10.git] / arch / x86 / kernel / head32.c
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
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
32 void __init i386_start_kernel(void)
33 {
34         sanitize_boot_params(&boot_params);
35
36         /* Call the subarch specific early setup function */
37         switch (boot_params.hdr.hardware_subarch) {
38         case X86_SUBARCH_MRST:
39                 x86_mrst_early_setup();
40                 break;
41         case X86_SUBARCH_CE4100:
42                 x86_ce4100_early_setup();
43                 break;
44         default:
45                 i386_default_early_setup();
46                 break;
47         }
48
49         start_kernel();
50 }