git://bbs.cooldavid.org / net-next-2.6.git / blame
| 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> |
| 700efc1b | 11 | |
| a4c81cf6 YL |
12 | #include <asm/setup.h> |
| 13 | #include <asm/sections.h> | |
| 14 | #include <asm/e820.h> | |
| 816c25e7 | 15 | #include <asm/page.h> |
| 3e1e9002 | 16 | #include <asm/trampoline.h> |
| de934103 TG |
17 | #include <asm/apic.h> |
| 18 | #include <asm/io_apic.h> | |
| 47a3d5da TG |
19 | #include <asm/bios_ebda.h> |
| 20 | ||
| 21 | static void __init i386_default_early_setup(void) | |
| 22 | { | |
| 23 | /* Initilize 32bit specific setup functions */ | |
| 24 | x86_init.resources.probe_roms = probe_roms; | |
| 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 | { | |
| db8f77c8 YL |
33 | #ifdef CONFIG_X86_TRAMPOLINE |
| 34 | /* | |
| 35 | * But first pinch a few for the stack/trampoline stuff | |
| 36 | * FIXME: Don't need the extra page at 4K, but need to fix | |
| 37 | * trampoline before removing it. (see the GDT stuff) | |
| 38 | */ | |
| 39 | reserve_early_overlap_ok(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, | |
| 40 | "EX TRAMPOLINE"); | |
| 41 | #endif | |
| 42 | ||
| 93dbda7c | 43 | reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS"); |
| a4c81cf6 YL |
44 | |
| 45 | #ifdef CONFIG_BLK_DEV_INITRD | |
| 46 | /* Reserve INITRD */ | |
| 47 | if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) { | |
| c967da6a | 48 | /* Assume only end is not page aligned */ |
| a4c81cf6 YL |
49 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
| 50 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
| c967da6a | 51 | u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
| a4c81cf6 YL |
52 | reserve_early(ramdisk_image, ramdisk_end, "RAMDISK"); |
| 53 | } | |
| 54 | #endif | |
| f7cf5a5b | 55 | |
| 47a3d5da TG |
56 | /* Call the subarch specific early setup function */ |
| 57 | switch (boot_params.hdr.hardware_subarch) { | |
| 3f4110a4 TG |
58 | case X86_SUBARCH_MRST: |
| 59 | x86_mrst_early_setup(); | |
| 60 | break; | |
| 47a3d5da TG |
61 | default: |
| 62 | i386_default_early_setup(); | |
| 63 | break; | |
| 64 | } | |
| a4c81cf6 YL |
65 | |
| 66 | /* | |
| 67 | * At this point everything still needed from the boot loader | |
| 68 | * or BIOS or kernel text should be early reserved or marked not | |
| 69 | * RAM in e820. All other memory is free game. | |
| 70 | */ | |
| 71 | ||
| 700efc1b EB |
72 | start_kernel(); |
| 73 | } |