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 30 struct 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 */ 37 struct 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