2 * linux/arch/i386/kernel/head32.c -- prepare to run common code
4 * Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
5 * Copyright (C) 2007 Eric Biederman <ebiederm@xmission.com>
8 #include <linux/init.h>
9 #include <linux/start_kernel.h>
11 #include <linux/memblock.h>
13 #include <asm/setup.h>
14 #include <asm/sections.h>
17 #include <asm/trampoline.h>
19 #include <asm/io_apic.h>
20 #include <asm/bios_ebda.h>
21 #include <asm/tlbflush.h>
23 static void __init
i386_default_early_setup(void)
25 /* Initialize 32bit specific setup functions */
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
;
30 reserve_ebda_region();
33 void __init
i386_start_kernel(void)
37 memblock_x86_reserve_range(__pa_symbol(&_text
), __pa_symbol(&__bss_stop
), "TEXT DATA BSS");
39 #ifdef CONFIG_BLK_DEV_INITRD
41 if (boot_params
.hdr
.type_of_loader
&& boot_params
.hdr
.ramdisk_image
) {
42 /* Assume only end is not page aligned */
43 u64 ramdisk_image
= boot_params
.hdr
.ramdisk_image
;
44 u64 ramdisk_size
= boot_params
.hdr
.ramdisk_size
;
45 u64 ramdisk_end
= PAGE_ALIGN(ramdisk_image
+ ramdisk_size
);
46 memblock_x86_reserve_range(ramdisk_image
, ramdisk_end
, "RAMDISK");
50 /* Call the subarch specific early setup function */
51 switch (boot_params
.hdr
.hardware_subarch
) {
52 case X86_SUBARCH_MRST
:
53 x86_mrst_early_setup();
55 case X86_SUBARCH_CE4100
:
56 x86_ce4100_early_setup();
59 i386_default_early_setup();
64 * At this point everything still needed from the boot loader
65 * or BIOS or kernel text should be early reserved or marked not
66 * RAM in e820. All other memory is free game.