1/* Copyright 2010 The Chromium OS Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file.
4 *
5 * Constants describing the kernel blob content.
6 */
7#ifndef VBOOT_REFERENCE_KERNEL_BLOB_H_
8#define VBOOT_REFERENCE_KERNEL_BLOB_H_
9
10/* Maximum kernel command-line size */
11#define CROS_CONFIG_SIZE 4096
12
13/* Size of the x86 zeropage table */
14#define CROS_PARAMS_SIZE 4096
15
16/* Alignment of various chunks within the kernel blob */
17#define CROS_ALIGN 4096
18
19/* Sentinel RAM address indicating that no entry address is specified */
20#define CROS_NO_ENTRY_ADDR     (~0)
21
22/* RAM address where the 32-bit kernel expects to be started */
23#define CROS_32BIT_ENTRY_ADDR  0x100000
24
25/* Simplified version of x86 kernel e820 memory map entries */
26#define E820_ENTRY_MAX 128
27#define E820_TYPE_RAM      1
28#define E820_TYPE_RESERVED 2
29
30struct linux_kernel_e820entry {
31	uint64_t start_addr;
32	uint64_t segment_size;
33	uint32_t segment_type;
34} __attribute__ ((packed));
35
36/* Simplified version of the x86 kernel zeropage table */
37struct linux_kernel_params {
38	uint8_t pad0[0x1e8 - 0x0];
39	uint8_t n_e820_entry;			/* 1e8 */
40	uint8_t pad1[0x1f1 - 0x1e9];
41	uint8_t setup_sects;			/* 1f1 */
42	uint8_t pad2[0x1fe - 0x1f2];
43	uint16_t boot_flag;			/* 1fe */
44	uint16_t jump;				/* 200 */
45	uint32_t header;			/* 202 */
46	uint16_t version;			/* 206 */
47	uint8_t pad3[0x210 - 0x208];
48	uint8_t type_of_loader;			/* 210 */
49	uint8_t pad4[0x218 - 0x211];
50	uint32_t ramdisk_image;			/* 218 */
51	uint32_t ramdisk_size;			/* 21c */
52	uint8_t pad5[0x228 - 0x220];
53	uint32_t cmd_line_ptr;			/* 228 */
54	uint32_t ramdisk_max;			/* 22c */
55	uint32_t kernel_alignment;		/* 230 */
56	uint8_t relocatable_kernel;		/* 234 */
57	uint8_t min_alignment;			/* 235 */
58	uint8_t pad6[0x2d0 - 0x236];
59	struct linux_kernel_e820entry
60		e820_entries[E820_ENTRY_MAX];	/* 2d0-cd0 */
61} __attribute__ ((packed));
62
63#endif /* VBOOT_REFERENCE_KERNEL_BLOB_H_ */
64