Commit | Line | Data |
---|---|---|
700efc1b EB |
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> | |
c967da6a | 10 | #include <linux/mm.h> |
72d7c3b3 | 11 | #include <linux/memblock.h> |
700efc1b | 12 | |
a4c81cf6 YL |
13 | #include <asm/setup.h> |
14 | #include <asm/sections.h> | |
15 | #include <asm/e820.h> | |
816c25e7 | 16 | #include <asm/page.h> |
de934103 TG |
17 | #include <asm/apic.h> |
18 | #include <asm/io_apic.h> | |
47a3d5da | 19 | #include <asm/bios_ebda.h> |
b40827fa | 20 | #include <asm/tlbflush.h> |
47a3d5da TG |
21 | |
22 | static void __init i386_default_early_setup(void) | |
23 | { | |
421f91d2 | 24 | /* Initialize 32bit specific setup functions */ |
47a3d5da TG |
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 | } | |
a4c81cf6 | 30 | |
700efc1b EB |
31 | void __init i386_start_kernel(void) |
32 | { | |
24aa0788 TH |
33 | memblock_reserve(__pa_symbol(&_text), |
34 | __pa_symbol(&__bss_stop) - __pa_symbol(&_text)); | |
a4c81cf6 YL |
35 | |
36 | #ifdef CONFIG_BLK_DEV_INITRD | |
37 | /* Reserve INITRD */ | |
38 | if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) { | |
c967da6a | 39 | /* Assume only end is not page aligned */ |
a4c81cf6 YL |
40 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
41 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
c967da6a | 42 | u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
24aa0788 | 43 | memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image); |
a4c81cf6 YL |
44 | } |
45 | #endif | |
f7cf5a5b | 46 | |
47a3d5da TG |
47 | /* Call the subarch specific early setup function */ |
48 | switch (boot_params.hdr.hardware_subarch) { | |
3f4110a4 TG |
49 | case X86_SUBARCH_MRST: |
50 | x86_mrst_early_setup(); | |
51 | break; | |
c751e17b TG |
52 | case X86_SUBARCH_CE4100: |
53 | x86_ce4100_early_setup(); | |
54 | break; | |
47a3d5da TG |
55 | default: |
56 | i386_default_early_setup(); | |
57 | break; | |
58 | } | |
a4c81cf6 YL |
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 | ||
700efc1b EB |
66 | start_kernel(); |
67 | } |