1 /* 2 * (C) Copyright 2002 3 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 #ifndef _ASM_ZIMAGE_H_ 25 #define _ASM_ZIMAGE_H_ 26 27 /* linux i386 zImage/bzImage header. Offsets relative to 28 * the start of the image */ 29 30 #define CMD_LINE_MAGIC_OFF 0x020 /* Magic 0xa33f if the offset below is valid */ 31 #define CMD_LINE_OFFSET_OFF 0x022 /* Offset to comandline */ 32 #define SETUP_SECTS_OFF 0x1F1 /* The size of the setup in sectors */ 33 #define ROOT_FLAGS_OFF 0x1F2 /* If set, the root is mounted readonly */ 34 #define VID_MODE_OFF 0x1FA /* Video mode control */ 35 #define ROOT_DEV_OFF 0x1FC /* Default root device number */ 36 #define BOOT_FLAG_OFF 0x1FE /* 0xAA55 magic number */ 37 #define HEADER_OFF 0x202 /* Magic signature "HdrS" */ 38 #define VERSION_OFF 0x206 /* Boot protocol version supported */ 39 #define REALMODE_SWTCH_OFF 0x208 /* Boot loader hook (see below) */ 40 #define START_SYS_OFF 0x20C /* Points to kernel version string */ 41 #define TYPE_OF_LOADER_OFF 0x210 /* Boot loader identifier */ 42 #define LOADFLAGS_OFF 0x211 /* Boot protocol option flags */ 43 #define SETUP_MOVE_SIZE_OFF 0x212 /* Move to high memory size (used with hooks) */ 44 #define CODE32_START_OFF 0x214 /* Boot loader hook (see below) */ 45 #define RAMDISK_IMAGE_OFF 0x218 /* initrd load address (set by boot loader) */ 46 #define RAMDISK_SIZE_OFF 0x21C /* initrd size (set by boot loader) */ 47 #define HEAP_END_PTR_OFF 0x224 /* Free memory after setup end */ 48 #define CMD_LINE_PTR_OFF 0x228 /* 32-bit pointer to the kernel command line */ 49 50 51 #define HEAP_FLAG 0x80 52 #define BIG_KERNEL_FLAG 0x01 53 54 /* magic numbers */ 55 #define KERNEL_MAGIC 0xaa55 56 #define KERNEL_V2_MAGIC 0x53726448 57 #define COMMAND_LINE_MAGIC 0xA33F 58 59 /* limits */ 60 #define BZIMAGE_MAX_SIZE 15*1024*1024 /* 15MB */ 61 #define ZIMAGE_MAX_SIZE 512*1024 /* 512k */ 62 #define SETUP_MAX_SIZE 32768 63 64 #define SETUP_START_OFFSET 0x200 65 #define BZIMAGE_LOAD_ADDR 0x100000 66 #define ZIMAGE_LOAD_ADDR 0x10000 67 68 void *load_zimage(char *image, unsigned long kernel_size, 69 unsigned long initrd_addr, unsigned long initrd_size, 70 int auto_boot); 71 72 void boot_zimage(void *setup_base); 73 74 #endif 75