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Diffstat (limited to 'include/boot/elf_boot.h')
| -rw-r--r-- | include/boot/elf_boot.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/include/boot/elf_boot.h b/include/boot/elf_boot.h new file mode 100644 index 0000000..08f561e --- /dev/null +++ b/include/boot/elf_boot.h @@ -0,0 +1,104 @@ +#ifndef ELF_BOOT_H +#define ELF_BOOT_H + +/* This defines the structure of a table of parameters useful for ELF + * bootable images. These parameters are all passed and generated + * by the bootloader to the booted image. For simplicity and + * consistency the Elf Note format is reused. + * + * All of the information must be Position Independent Data. + * That is it must be safe to relocate the whole ELF boot parameter + * block without changing the meaning or correctnes of the data. + * Additionally it must be safe to permute the order of the ELF notes + * to any possible permutation without changing the meaning or correctness + * of the data. + * + */ + +#define ELF_BOOT_MAGIC 0x0E1FB007 + +#ifndef ASSEMBLY +#include <stdint.h> +typedef uint16_t Elf_Half; +typedef uint32_t Elf_Word; +typedef uint64_t Elf_Xword; + +/* + * Elf boot notes... + */ + +typedef struct Elf_Bhdr +{ + Elf_Word b_signature; /* "0x0E1FB007" */ + Elf_Word b_size; + Elf_Half b_checksum; + Elf_Half b_records; +} Elf_Bhdr; + +/* + * ELF Notes. + */ + +typedef struct Elf_Nhdr +{ + Elf_Word n_namesz; /* Length of the note's name. */ + Elf_Word n_descsz; /* Length of the note's descriptor. */ + Elf_Word n_type; /* Type of the note. */ +} Elf_Nhdr; + +#endif /* ASSEMBLY */ + + +/* Standardized Elf image notes for booting... The name for all of these is ELFBoot */ +#define ELF_NOTE_BOOT "ELFBoot" + +#define EIN_PROGRAM_NAME 0x00000001 +/* The program in this ELF file */ +#define EIN_PROGRAM_VERSION 0x00000002 +/* The version of the program in this ELF file */ +#define EIN_PROGRAM_CHECKSUM 0x00000003 +/* ip style checksum of the memory image. */ + + +/* Linux image notes for booting... The name for all of these is Linux */ + +#if 0 +#define LIN_COMMAND_LINE_PTR 0x00000006 +/* Pointer to the command line to pass to the loaded kernel. */ +#define LIN_INITRD_START_PTR 0x00000007 +/* Pointer to the start of the ramdisk in bytes */ +#define LIN_INITRD_SIZE_PTR 0x00000008 +/* Pointer to the size of the ramdisk in bytes */ +#define LIN_VID_MODE_PTR 0x00000009 +/* Pointer to the vid_mode parameter */ +#endif + +/* Etherboot specific notes */ +#define EB_PARAM_NOTE "Etherboot" +#define EB_IA64_SYSTAB 0x00000001 +#define EB_IA64_MEMMAP 0x00000002 +#define EB_IA64_FPSWA 0x00000003 +#define EB_IA64_CONINFO 0x00000004 +#define EB_BOOTP_DATA 0x00000005 +#define EB_HEADER 0x00000006 +#define EB_IA64_IMAGE_HANDLE 0x00000007 +#define EB_I386_MEMMAP 0x00000008 + +/* For standard notes n_namesz must be zero */ +/* All of the following standard note types provide a single null + * terminated string in the descriptor. + */ +#define EBN_FIRMWARE_TYPE 0x00000001 +/* On platforms that support multiple classes of firmware this field + * specifies the class of firmware you are loaded under. + */ +#define EBN_BOOTLOADER_NAME 0x00000002 +/* This specifies just the name of the bootloader for easy comparison */ +#define EBN_BOOTLOADER_VERSION 0x00000003 +/* This specifies the version of the bootlader */ +#define EBN_COMMAND_LINE 0x00000004 +/* This specifies a command line that can be set by user interaction, + * and is provided as a free form string to the loaded image. + */ + +#endif /* ELF_BOOT_H */ |