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// Copyright 2010 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Constants describing the kernel blob content.
#ifndef VBOOT_REFERENCE_KERNEL_BLOB_H_
#define VBOOT_REFERENCE_KERNEL_BLOB_H_
// Maximum kernel command-line size
#define CROS_CONFIG_SIZE 4096
// Size of the x86 zeropage table
#define CROS_PARAMS_SIZE 4096
// Alignment of various chunks within the kernel blob
#define CROS_ALIGN 4096
// Sentinel RAM address indicating that no entry address is specified
#define CROS_NO_ENTRY_ADDR (~0)
// RAM address where the 32-bit kernel expects to be started
#define CROS_32BIT_ENTRY_ADDR 0x100000
// Simplified version of x86 kernel e820 memory map entries
#define E820_ENTRY_MAX 128
#define E820_TYPE_RAM 1
#define E820_TYPE_RESERVED 2
struct linux_kernel_e820entry {
uint64_t start_addr;
uint64_t segment_size;
uint32_t segment_type;
} __attribute__((packed));
// Simplified version of the x86 kernel zeropage table
struct linux_kernel_params
{
uint8_t pad0[0x1e8 - 0x0];
uint8_t n_e820_entry; // 1e8
uint8_t pad1[0x1f1 - 0x1e9];
uint8_t setup_sects; // 1f1
uint8_t pad2[0x1fe - 0x1f2];
uint16_t boot_flag; // 1fe
uint16_t jump; // 200
uint32_t header; // 202
uint16_t version; // 206
uint8_t pad3[0x210 - 0x208];
uint8_t type_of_loader; // 210
uint8_t pad4[0x218 - 0x211];
uint32_t ramdisk_image; // 218
uint32_t ramdisk_size; // 21c
uint8_t pad5[0x228 - 0x220];
uint32_t cmd_line_ptr; // 228
uint32_t ramdisk_max; // 22c
uint32_t kernel_alignment; // 230
uint8_t relocatable_kernel; // 234
uint8_t min_alignment; // 235
uint8_t pad6[0x2d0 - 0x236];
struct linux_kernel_e820entry e820_entries[E820_ENTRY_MAX]; // 2d0 - cd0
} __attribute__ ((packed));
#endif // VBOOT_REFERENCE_KERNEL_BLOB_H_
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