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 11 #include <asm/setup.h> 12 #include <asm/sections.h> 13 #include <asm/e820.h> 14 #include <asm/page.h> 15 #include <asm/trampoline.h> 16 #include <asm/apic.h> 17 #include <asm/io_apic.h> 18 19 void __init i386_start_kernel(void) 20 { 21 reserve_trampoline_memory(); 22 23 reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS"); 24 25 #ifdef CONFIG_BLK_DEV_INITRD 26 /* Reserve INITRD */ 27 if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) { 28 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 29 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 30 u64 ramdisk_end = ramdisk_image + ramdisk_size; 31 reserve_early(ramdisk_image, ramdisk_end, "RAMDISK"); 32 } 33 #endif 34 /* Initilize 32bit specific setup functions */ 35 x86_init.resources.probe_roms = probe_roms; 36 x86_init.resources.reserve_resources = i386_reserve_resources; 37 x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc; 38 39 x86_init.resources.reserve_ebda_region(); 40 41 /* 42 * At this point everything still needed from the boot loader 43 * or BIOS or kernel text should be early reserved or marked not 44 * RAM in e820. All other memory is free game. 45 */ 46 47 start_kernel(); 48 } 49