xref: /aosp_15_r20/external/vboot_reference/futility/kernel_blob.h (revision 8617a60d3594060b7ecbd21bc622a7c14f3cf2bc)
1*8617a60dSAndroid Build Coastguard Worker /* Copyright 2010 The ChromiumOS Authors
2*8617a60dSAndroid Build Coastguard Worker  * Use of this source code is governed by a BSD-style license that can be
3*8617a60dSAndroid Build Coastguard Worker  * found in the LICENSE file.
4*8617a60dSAndroid Build Coastguard Worker  *
5*8617a60dSAndroid Build Coastguard Worker  * Constants describing the kernel blob content.
6*8617a60dSAndroid Build Coastguard Worker  */
7*8617a60dSAndroid Build Coastguard Worker 
8*8617a60dSAndroid Build Coastguard Worker #ifndef VBOOT_REFERENCE_KERNEL_BLOB_H_
9*8617a60dSAndroid Build Coastguard Worker #define VBOOT_REFERENCE_KERNEL_BLOB_H_
10*8617a60dSAndroid Build Coastguard Worker 
11*8617a60dSAndroid Build Coastguard Worker /* Linux vmlinuz header signature */
12*8617a60dSAndroid Build Coastguard Worker #define VMLINUZ_HEADER_SIG 0x53726448
13*8617a60dSAndroid Build Coastguard Worker 
14*8617a60dSAndroid Build Coastguard Worker /* Maximum kernel command-line size */
15*8617a60dSAndroid Build Coastguard Worker #define CROS_CONFIG_SIZE 4096
16*8617a60dSAndroid Build Coastguard Worker 
17*8617a60dSAndroid Build Coastguard Worker /* Size of the x86 zeropage table */
18*8617a60dSAndroid Build Coastguard Worker #define CROS_PARAMS_SIZE 4096
19*8617a60dSAndroid Build Coastguard Worker 
20*8617a60dSAndroid Build Coastguard Worker /* Alignment of various chunks within the kernel blob */
21*8617a60dSAndroid Build Coastguard Worker #define CROS_ALIGN 4096
22*8617a60dSAndroid Build Coastguard Worker 
23*8617a60dSAndroid Build Coastguard Worker /* Sentinel RAM address indicating that no entry address is specified */
24*8617a60dSAndroid Build Coastguard Worker #define CROS_NO_ENTRY_ADDR     (~0)
25*8617a60dSAndroid Build Coastguard Worker 
26*8617a60dSAndroid Build Coastguard Worker /* RAM address where the 32-bit kernel expects to be started */
27*8617a60dSAndroid Build Coastguard Worker #define CROS_32BIT_ENTRY_ADDR  0x100000
28*8617a60dSAndroid Build Coastguard Worker 
29*8617a60dSAndroid Build Coastguard Worker /* Simplified version of x86 kernel e820 memory map entries */
30*8617a60dSAndroid Build Coastguard Worker #define E820_ENTRY_MAX 128
31*8617a60dSAndroid Build Coastguard Worker #define E820_TYPE_RAM      1
32*8617a60dSAndroid Build Coastguard Worker #define E820_TYPE_RESERVED 2
33*8617a60dSAndroid Build Coastguard Worker 
34*8617a60dSAndroid Build Coastguard Worker struct linux_kernel_e820entry {
35*8617a60dSAndroid Build Coastguard Worker 	uint64_t start_addr;
36*8617a60dSAndroid Build Coastguard Worker 	uint64_t segment_size;
37*8617a60dSAndroid Build Coastguard Worker 	uint32_t segment_type;
38*8617a60dSAndroid Build Coastguard Worker } __attribute__((packed));
39*8617a60dSAndroid Build Coastguard Worker 
40*8617a60dSAndroid Build Coastguard Worker /* Simplified version of the x86 kernel zeropage table */
41*8617a60dSAndroid Build Coastguard Worker struct linux_kernel_params {
42*8617a60dSAndroid Build Coastguard Worker 	uint8_t pad0[0x1e8 - 0x0];
43*8617a60dSAndroid Build Coastguard Worker 	uint8_t n_e820_entry;			/* 1e8 */
44*8617a60dSAndroid Build Coastguard Worker 	uint8_t pad1[0x1f1 - 0x1e9];
45*8617a60dSAndroid Build Coastguard Worker 	uint8_t setup_sects;			/* 1f1 */
46*8617a60dSAndroid Build Coastguard Worker 	uint8_t pad2[0x1fe - 0x1f2];
47*8617a60dSAndroid Build Coastguard Worker 	uint16_t boot_flag;			/* 1fe */
48*8617a60dSAndroid Build Coastguard Worker 	uint16_t jump;				/* 200 */
49*8617a60dSAndroid Build Coastguard Worker 	uint32_t header;			/* 202 */
50*8617a60dSAndroid Build Coastguard Worker 	uint16_t version;			/* 206 */
51*8617a60dSAndroid Build Coastguard Worker 	uint8_t pad3[0x210 - 0x208];
52*8617a60dSAndroid Build Coastguard Worker 	uint8_t type_of_loader;			/* 210 */
53*8617a60dSAndroid Build Coastguard Worker 	uint8_t pad4[0x218 - 0x211];
54*8617a60dSAndroid Build Coastguard Worker 	uint32_t ramdisk_image;			/* 218 */
55*8617a60dSAndroid Build Coastguard Worker 	uint32_t ramdisk_size;			/* 21c */
56*8617a60dSAndroid Build Coastguard Worker 	uint8_t pad5[0x228 - 0x220];
57*8617a60dSAndroid Build Coastguard Worker 	uint32_t cmd_line_ptr;			/* 228 */
58*8617a60dSAndroid Build Coastguard Worker 	uint32_t ramdisk_max;			/* 22c */
59*8617a60dSAndroid Build Coastguard Worker 	uint32_t kernel_alignment;		/* 230 */
60*8617a60dSAndroid Build Coastguard Worker 	uint8_t relocatable_kernel;		/* 234 */
61*8617a60dSAndroid Build Coastguard Worker 	uint8_t min_alignment;			/* 235 */
62*8617a60dSAndroid Build Coastguard Worker 	uint8_t pad6[0x2d0 - 0x236];
63*8617a60dSAndroid Build Coastguard Worker 	struct linux_kernel_e820entry
64*8617a60dSAndroid Build Coastguard Worker 		e820_entries[E820_ENTRY_MAX];	/* 2d0-cd0 */
65*8617a60dSAndroid Build Coastguard Worker } __attribute__((packed));
66*8617a60dSAndroid Build Coastguard Worker 
67*8617a60dSAndroid Build Coastguard Worker #endif  /* VBOOT_REFERENCE_KERNEL_BLOB_H_ */
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