Eric W. Biederman | 700efc1 | 2008-02-23 09:58:20 +0100 | [diff] [blame] | 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> |
Yinghai Lu | c967da6 | 2010-03-28 19:42:55 -0700 | [diff] [blame] | 10 | #include <linux/mm.h> |
Yinghai Lu | 72d7c3b | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 11 | #include <linux/memblock.h> |
Eric W. Biederman | 700efc1 | 2008-02-23 09:58:20 +0100 | [diff] [blame] | 12 | |
Yinghai Lu | a4c81cf | 2008-05-18 01:18:57 -0700 | [diff] [blame] | 13 | #include <asm/setup.h> |
| 14 | #include <asm/sections.h> |
| 15 | #include <asm/e820.h> |
Thomas Gleixner | 816c25e | 2009-08-19 14:36:27 +0200 | [diff] [blame] | 16 | #include <asm/page.h> |
Rafael J. Wysocki | 3e1e900 | 2008-12-08 00:50:22 +0100 | [diff] [blame] | 17 | #include <asm/trampoline.h> |
Thomas Gleixner | de93410 | 2009-08-20 09:27:29 +0200 | [diff] [blame] | 18 | #include <asm/apic.h> |
| 19 | #include <asm/io_apic.h> |
Thomas Gleixner | 47a3d5d | 2009-08-29 15:03:59 +0200 | [diff] [blame] | 20 | #include <asm/bios_ebda.h> |
Borislav Petkov | b40827fa | 2010-08-28 15:58:33 +0200 | [diff] [blame] | 21 | #include <asm/tlbflush.h> |
Thomas Gleixner | 47a3d5d | 2009-08-29 15:03:59 +0200 | [diff] [blame] | 22 | |
| 23 | static void __init i386_default_early_setup(void) |
| 24 | { |
Uwe Kleine-König | 421f91d | 2010-06-11 12:17:00 +0200 | [diff] [blame] | 25 | /* Initialize 32bit specific setup functions */ |
Thomas Gleixner | 47a3d5d | 2009-08-29 15:03:59 +0200 | [diff] [blame] | 26 | x86_init.resources.probe_roms = probe_roms; |
| 27 | x86_init.resources.reserve_resources = i386_reserve_resources; |
| 28 | x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc; |
| 29 | |
| 30 | reserve_ebda_region(); |
| 31 | } |
Yinghai Lu | a4c81cf | 2008-05-18 01:18:57 -0700 | [diff] [blame] | 32 | |
Eric W. Biederman | 700efc1 | 2008-02-23 09:58:20 +0100 | [diff] [blame] | 33 | void __init i386_start_kernel(void) |
| 34 | { |
Yinghai Lu | 72d7c3b | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 35 | memblock_init(); |
| 36 | |
Yinghai Lu | db8f77c | 2010-02-10 01:20:23 -0800 | [diff] [blame] | 37 | #ifdef CONFIG_X86_TRAMPOLINE |
| 38 | /* |
| 39 | * But first pinch a few for the stack/trampoline stuff |
| 40 | * FIXME: Don't need the extra page at 4K, but need to fix |
| 41 | * trampoline before removing it. (see the GDT stuff) |
| 42 | */ |
Yinghai Lu | 72d7c3b | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 43 | memblock_x86_reserve_range(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE"); |
Yinghai Lu | db8f77c | 2010-02-10 01:20:23 -0800 | [diff] [blame] | 44 | #endif |
| 45 | |
Yinghai Lu | a9ce6bc | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 46 | memblock_x86_reserve_range(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS"); |
Yinghai Lu | a4c81cf | 2008-05-18 01:18:57 -0700 | [diff] [blame] | 47 | |
| 48 | #ifdef CONFIG_BLK_DEV_INITRD |
| 49 | /* Reserve INITRD */ |
| 50 | if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) { |
Yinghai Lu | c967da6 | 2010-03-28 19:42:55 -0700 | [diff] [blame] | 51 | /* Assume only end is not page aligned */ |
Yinghai Lu | a4c81cf | 2008-05-18 01:18:57 -0700 | [diff] [blame] | 52 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
| 53 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; |
Yinghai Lu | c967da6 | 2010-03-28 19:42:55 -0700 | [diff] [blame] | 54 | u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
Yinghai Lu | a9ce6bc | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 55 | memblock_x86_reserve_range(ramdisk_image, ramdisk_end, "RAMDISK"); |
Yinghai Lu | a4c81cf | 2008-05-18 01:18:57 -0700 | [diff] [blame] | 56 | } |
| 57 | #endif |
Thomas Gleixner | f7cf5a5 | 2009-08-19 14:43:56 +0200 | [diff] [blame] | 58 | |
Thomas Gleixner | 47a3d5d | 2009-08-29 15:03:59 +0200 | [diff] [blame] | 59 | /* Call the subarch specific early setup function */ |
| 60 | switch (boot_params.hdr.hardware_subarch) { |
Thomas Gleixner | 3f4110a | 2009-08-29 14:54:20 +0200 | [diff] [blame] | 61 | case X86_SUBARCH_MRST: |
| 62 | x86_mrst_early_setup(); |
| 63 | break; |
Thomas Gleixner | c751e17 | 2010-11-09 12:08:04 -0800 | [diff] [blame] | 64 | case X86_SUBARCH_CE4100: |
| 65 | x86_ce4100_early_setup(); |
| 66 | break; |
Thomas Gleixner | 47a3d5d | 2009-08-29 15:03:59 +0200 | [diff] [blame] | 67 | default: |
| 68 | i386_default_early_setup(); |
| 69 | break; |
| 70 | } |
Yinghai Lu | a4c81cf | 2008-05-18 01:18:57 -0700 | [diff] [blame] | 71 | |
| 72 | /* |
| 73 | * At this point everything still needed from the boot loader |
| 74 | * or BIOS or kernel text should be early reserved or marked not |
| 75 | * RAM in e820. All other memory is free game. |
| 76 | */ |
| 77 | |
Eric W. Biederman | 700efc1 | 2008-02-23 09:58:20 +0100 | [diff] [blame] | 78 | start_kernel(); |
| 79 | } |