5 /* This defines the structure of a table of parameters useful for ELF
6 * bootable images. These parameters are all passed and generated
7 * by the bootloader to the booted image. For simplicity and
8 * consistency the Elf Note format is reused.
10 * All of the information must be Position Independent Data.
11 * That is it must be safe to relocate the whole ELF boot parameter
12 * block without changing the meaning or correctnes of the data.
13 * Additionally it must be safe to permute the order of the ELF notes
14 * to any possible permutation without changing the meaning or correctness
19 #define ELF_BHDR_MAGIC 0x0E1FB007
23 typedef uint16_t Elf_Half;
24 typedef uint32_t Elf_Word;
30 typedef struct Elf_Bhdr
32 Elf_Word b_signature; /* "0x0E1FB007" */
42 typedef struct Elf_Nhdr
44 Elf_Word n_namesz; /* Length of the note's name. */
45 Elf_Word n_descsz; /* Length of the note's descriptor. */
46 Elf_Word n_type; /* Type of the note. */
51 /* Standardized Elf image notes for booting... The name for all of these is ELFBoot */
52 #define ELF_NOTE_BOOT "ELFBoot"
54 #define EIN_PROGRAM_NAME 0x00000001
55 /* The program in this ELF file */
56 #define EIN_PROGRAM_VERSION 0x00000002
57 /* The version of the program in this ELF file */
58 #define EIN_PROGRAM_CHECKSUM 0x00000003
59 /* ip style checksum of the memory image. */
62 /* Linux image notes for booting... The name for all of these is Linux */
64 #define LIN_COMMAND_LINE 0x00000001
65 /* The command line to pass to the loaded kernel. */
66 #define LIN_ROOT_DEV 0x00000002
67 /* The root dev to pass to the loaded kernel. */
68 #define LIN_RAMDISK_FLAGS 0x00000003
69 /* Various old ramdisk flags */
70 #define LIN_INITRD_START 0x00000004
71 /* Start of the ramdisk in bytes */
72 #define LIN_INITRD_SIZE 0x00000005
73 /* Size of the ramdisk in bytes */
75 /* Notes that are passed to a loaded image */
76 /* For the standard elf boot notes n_namesz must be zero */
77 #define EBN_FIRMWARE_TYPE 0x00000001
78 /* ASCIZ name of the platform firmware. */
79 #define EBN_BOOTLOADER_NAME 0x00000002
80 /* This specifies just the ASCIZ name of the bootloader */
81 #define EBN_BOOTLOADER_VERSION 0x00000003
82 /* This specifies the version of the bootloader as an ASCIZ string */
83 #define EBN_COMMAND_LINE 0x00000004
84 /* This specifies a command line that can be set by user interaction,
85 * and is provided as a free form ASCIZ string to the loaded image.
87 #define EBN_NOP 0x00000005
88 /* A note nop note has no meaning, useful for inserting explicit padding */
89 #define EBN_LOADED_IMAGE 0x00000006
90 /* An ASCIZ string naming the loaded image */
93 /* Etherboot specific notes */
94 #define EB_PARAM_NOTE "Etherboot"
95 #define EB_IA64_SYSTAB 0x00000001
96 #define EB_IA64_MEMMAP 0x00000002
97 #define EB_IA64_FPSWA 0x00000003
98 #define EB_IA64_CONINFO 0x00000004
99 #define EB_BOOTP_DATA 0x00000005
100 #define EB_HEADER 0x00000006
101 #define EB_IA64_IMAGE_HANDLE 0x00000007
102 #define EB_I386_MEMMAP 0x00000008
105 #endif /* ELF_BOOT_H */