Commit | Line | Data |
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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> | |
10 | ||
a4c81cf6 YL |
11 | #include <asm/setup.h> |
12 | #include <asm/sections.h> | |
13 | #include <asm/e820.h> | |
816c25e7 | 14 | #include <asm/page.h> |
3e1e9002 | 15 | #include <asm/trampoline.h> |
de934103 TG |
16 | #include <asm/apic.h> |
17 | #include <asm/io_apic.h> | |
47a3d5da TG |
18 | #include <asm/bios_ebda.h> |
19 | ||
20 | static void __init i386_default_early_setup(void) | |
21 | { | |
22 | /* Initilize 32bit specific setup functions */ | |
23 | x86_init.resources.probe_roms = probe_roms; | |
24 | x86_init.resources.reserve_resources = i386_reserve_resources; | |
25 | x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc; | |
26 | ||
27 | reserve_ebda_region(); | |
28 | } | |
a4c81cf6 | 29 | |
700efc1b EB |
30 | void __init i386_start_kernel(void) |
31 | { | |
db8f77c8 YL |
32 | #ifdef CONFIG_X86_TRAMPOLINE |
33 | /* | |
34 | * But first pinch a few for the stack/trampoline stuff | |
35 | * FIXME: Don't need the extra page at 4K, but need to fix | |
36 | * trampoline before removing it. (see the GDT stuff) | |
37 | */ | |
38 | reserve_early_overlap_ok(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, | |
39 | "EX TRAMPOLINE"); | |
40 | #endif | |
41 | ||
93dbda7c | 42 | reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS"); |
a4c81cf6 YL |
43 | |
44 | #ifdef CONFIG_BLK_DEV_INITRD | |
45 | /* Reserve INITRD */ | |
46 | if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) { | |
47 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; | |
48 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
49 | u64 ramdisk_end = ramdisk_image + ramdisk_size; | |
50 | reserve_early(ramdisk_image, ramdisk_end, "RAMDISK"); | |
51 | } | |
52 | #endif | |
f7cf5a5b | 53 | |
47a3d5da TG |
54 | /* Call the subarch specific early setup function */ |
55 | switch (boot_params.hdr.hardware_subarch) { | |
3f4110a4 TG |
56 | case X86_SUBARCH_MRST: |
57 | x86_mrst_early_setup(); | |
58 | break; | |
47a3d5da TG |
59 | default: |
60 | i386_default_early_setup(); | |
61 | break; | |
62 | } | |
a4c81cf6 YL |
63 | |
64 | /* | |
65 | * At this point everything still needed from the boot loader | |
66 | * or BIOS or kernel text should be early reserved or marked not | |
67 | * RAM in e820. All other memory is free game. | |
68 | */ | |
69 | ||
700efc1b EB |
70 | start_kernel(); |
71 | } |