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wdenk2262cfe2002-11-18 00:14:45 +00001/*
2 * (C) Copyright 2002
3 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
wdenk8bde7f72003-06-27 21:31:46 +00004 *
wdenk2262cfe2002-11-18 00:14:45 +00005 * 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
wdenk8bde7f72003-06-27 21:31:46 +000027/* linux i386 zImage/bzImage header. Offsets relative to
wdenk2262cfe2002-11-18 00:14:45 +000028 * 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
wdenk8bde7f72003-06-27 21:31:46 +000065#define BZIMAGE_LOAD_ADDR 0x100000
wdenk2262cfe2002-11-18 00:14:45 +000066#define ZIMAGE_LOAD_ADDR 0x10000
wdenk8bde7f72003-06-27 21:31:46 +000067
68void *load_zimage(char *image, unsigned long kernel_size,
wdenk2262cfe2002-11-18 00:14:45 +000069 unsigned long initrd_addr, unsigned long initrd_size,
70 int auto_boot);
71
72void boot_zimage(void *setup_base);
73image_header_t *fake_zimage_header(image_header_t *hdr, void *ptr, int size);
74
75#endif