106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
#ifndef ELF_BOOT_H
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#define ELF_BOOT_H
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/* This defines the structure of a table of parameters useful for ELF
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* bootable images. These parameters are all passed and generated
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* by the bootloader to the booted image. For simplicity and
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* consistency the Elf Note format is reused.
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*
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* All of the information must be Position Independent Data.
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* That is it must be safe to relocate the whole ELF boot parameter
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* block without changing the meaning or correctnes of the data.
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* Additionally it must be safe to permute the order of the ELF notes
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* to any possible permutation without changing the meaning or correctness
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* of the data.
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*
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*/
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#define ELF_BHDR_MAGIC 0x0E1FB007
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#ifndef ASSEMBLY
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#include <stdint.h>
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typedef uint16_t Elf_Half;
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typedef uint32_t Elf_Word;
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/*
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* Elf boot notes...
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*/
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typedef struct Elf_Bhdr
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{
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Elf_Word b_signature; /* "0x0E1FB007" */
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Elf_Word b_size;
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Elf_Half b_checksum;
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Elf_Half b_records;
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} Elf_Bhdr;
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/*
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* ELF Notes.
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*/
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typedef struct Elf_Nhdr
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{
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Elf_Word n_namesz; /* Length of the note's name. */
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Elf_Word n_descsz; /* Length of the note's descriptor. */
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Elf_Word n_type; /* Type of the note. */
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} Elf_Nhdr;
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#endif /* ASSEMBLY */
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/* Standardized Elf image notes for booting... The name for all of these is ELFBoot */
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#define ELF_NOTE_BOOT "ELFBoot"
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#define EIN_PROGRAM_NAME 0x00000001
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/* The program in this ELF file */
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#define EIN_PROGRAM_VERSION 0x00000002
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/* The version of the program in this ELF file */
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#define EIN_PROGRAM_CHECKSUM 0x00000003
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/* ip style checksum of the memory image. */
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/* Linux image notes for booting... The name for all of these is Linux */
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#define LIN_COMMAND_LINE 0x00000001
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/* The command line to pass to the loaded kernel. */
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#define LIN_ROOT_DEV 0x00000002
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/* The root dev to pass to the loaded kernel. */
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#define LIN_RAMDISK_FLAGS 0x00000003
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/* Various old ramdisk flags */
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#define LIN_INITRD_START 0x00000004
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/* Start of the ramdisk in bytes */
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#define LIN_INITRD_SIZE 0x00000005
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/* Size of the ramdisk in bytes */
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/* Notes that are passed to a loaded image */
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/* For the standard elf boot notes n_namesz must be zero */
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#define EBN_FIRMWARE_TYPE 0x00000001
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/* ASCIZ name of the platform firmware. */
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#define EBN_BOOTLOADER_NAME 0x00000002
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/* This specifies just the ASCIZ name of the bootloader */
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#define EBN_BOOTLOADER_VERSION 0x00000003
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/* This specifies the version of the bootloader as an ASCIZ string */
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#define EBN_COMMAND_LINE 0x00000004
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/* This specifies a command line that can be set by user interaction,
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* and is provided as a free form ASCIZ string to the loaded image.
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*/
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#define EBN_NOP 0x00000005
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/* A note nop note has no meaning, useful for inserting explicit padding */
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#define EBN_LOADED_IMAGE 0x00000006
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/* An ASCIZ string naming the loaded image */
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/* Etherboot specific notes */
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#define EB_PARAM_NOTE "Etherboot"
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#define EB_IA64_SYSTAB 0x00000001
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#define EB_IA64_MEMMAP 0x00000002
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#define EB_IA64_FPSWA 0x00000003
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#define EB_IA64_CONINFO 0x00000004
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#define EB_BOOTP_DATA 0x00000005
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#define EB_HEADER 0x00000006
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#define EB_IA64_IMAGE_HANDLE 0x00000007
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#define EB_I386_MEMMAP 0x00000008
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#endif /* ELF_BOOT_H */
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