x86, realmode: Move ACPI wakeup to unified realmode code
[linux-3.10.git] / arch / x86 / kernel / head32.c
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 #include <linux/mm.h>
11 #include <linux/memblock.h>
12
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>
21
22 static void __init i386_default_early_setup(void)
23 {
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;
27
28         reserve_ebda_region();
29 }
30
31 void __init i386_start_kernel(void)
32 {
33         memblock_reserve(__pa_symbol(&_text),
34                          __pa_symbol(&__bss_stop) - __pa_symbol(&_text));
35
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);
44         }
45 #endif
46
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;
58         }
59
60         /*
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.
64          */
65
66         start_kernel();
67 }