ARM: mmp: fix potential NULL dereference
[linux/fpc-iii.git] / arch / x86 / kernel / head32.c
blobc18f59d10101cefc82f6638bcca758a480b70cc3
1 /*
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>
6 */
8 #include <linux/init.h>
9 #include <linux/start_kernel.h>
10 #include <linux/mm.h>
11 #include <linux/memblock.h>
13 #include <asm/setup.h>
14 #include <asm/sections.h>
15 #include <asm/e820.h>
16 #include <asm/page.h>
17 #include <asm/apic.h>
18 #include <asm/io_apic.h>
19 #include <asm/bios_ebda.h>
20 #include <asm/tlbflush.h>
22 static void __init i386_default_early_setup(void)
24 /* Initialize 32bit specific setup functions */
25 x86_init.resources.reserve_resources = i386_reserve_resources;
26 x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc;
28 reserve_ebda_region();
31 void __init i386_start_kernel(void)
33 memblock_reserve(__pa_symbol(&_text),
34 __pa_symbol(&__bss_stop) - __pa_symbol(&_text));
36 #ifdef CONFIG_BLK_DEV_INITRD
37 /* Reserve INITRD */
38 if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
39 /* Assume only end is not page aligned */
40 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
41 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
42 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
43 memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
45 #endif
47 /* Call the subarch specific early setup function */
48 switch (boot_params.hdr.hardware_subarch) {
49 case X86_SUBARCH_MRST:
50 x86_mrst_early_setup();
51 break;
52 case X86_SUBARCH_CE4100:
53 x86_ce4100_early_setup();
54 break;
55 default:
56 i386_default_early_setup();
57 break;
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.
66 start_kernel();