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1.1 root 1: #ifndef ELF_BOOT_H
2: #define ELF_BOOT_H
3:
4:
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.
9: *
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
15: * of the data.
16: *
17: */
18:
19: #define ELF_BHDR_MAGIC 0x0E1FB007
20:
21: #ifndef __ASSEMBLY__
22: typedef uint16_t Elf_Half;
23: typedef uint32_t Elf_Word;
24:
25: /*
26: * Elf boot notes...
27: */
28:
29: typedef struct Elf_Bhdr
30: {
31: Elf_Word b_signature; /* "0x0E1FB007" */
32: Elf_Word b_size;
33: Elf_Half b_checksum;
34: Elf_Half b_records;
35: } Elf_Bhdr;
36:
37: /*
38: * ELF Notes.
39: */
40:
41: typedef struct Elf_Nhdr
42: {
43: Elf_Word n_namesz; /* Length of the note's name. */
44: Elf_Word n_descsz; /* Length of the note's descriptor. */
45: Elf_Word n_type; /* Type of the note. */
46: } Elf_Nhdr;
47:
48: #endif /* __ASSEMBLY__ */
49:
50: /* Standardized Elf image notes for booting... The name for all of these is ELFBoot */
51: #define ELF_NOTE_BOOT "ELFBoot"
52:
53: #define EIN_PROGRAM_NAME 0x00000001
54: /* The program in this ELF file */
55: #define EIN_PROGRAM_VERSION 0x00000002
56: /* The version of the program in this ELF file */
57: #define EIN_PROGRAM_CHECKSUM 0x00000003
58: /* ip style checksum of the memory image. */
59:
60:
61: /* Linux image notes for booting... The name for all of these is Linux */
62:
63: #define LIN_COMMAND_LINE 0x00000001
64: /* The command line to pass to the loaded kernel. */
65: #define LIN_ROOT_DEV 0x00000002
66: /* The root dev to pass to the loaded kernel. */
67: #define LIN_RAMDISK_FLAGS 0x00000003
68: /* Various old ramdisk flags */
69: #define LIN_INITRD_START 0x00000004
70: /* Start of the ramdisk in bytes */
71: #define LIN_INITRD_SIZE 0x00000005
72: /* Size of the ramdisk in bytes */
73:
74: /* Notes that are passed to a loaded image */
75: /* For the standard elf boot notes n_namesz must be zero */
76: #define EBN_FIRMWARE_TYPE 0x00000001
77: /* ASCIZ name of the platform firmware. */
78: #define EBN_BOOTLOADER_NAME 0x00000002
79: /* This specifies just the ASCIZ name of the bootloader */
80: #define EBN_BOOTLOADER_VERSION 0x00000003
81: /* This specifies the version of the bootloader as an ASCIZ string */
82: #define EBN_COMMAND_LINE 0x00000004
83: /* This specifies a command line that can be set by user interaction,
84: * and is provided as a free form ASCIZ string to the loaded image.
85: */
86: #define EBN_NOP 0x00000005
87: /* A note nop note has no meaning, useful for inserting explicit padding */
88: #define EBN_LOADED_IMAGE 0x00000006
89: /* An ASCIZ string naming the loaded image */
90:
91:
92: /* Etherboot specific notes */
93: #define EB_PARAM_NOTE "Etherboot"
94: #define EB_IA64_SYSTAB 0x00000001
95: #define EB_IA64_MEMMAP 0x00000002
96: #define EB_IA64_FPSWA 0x00000003
97: #define EB_IA64_CONINFO 0x00000004
98: #define EB_BOOTP_DATA 0x00000005
99: #define EB_HEADER 0x00000006
100: #define EB_IA64_IMAGE_HANDLE 0x00000007
101: #define EB_I386_MEMMAP 0x00000008
102:
103: extern const struct elf_image_note elf_image_notes;
104:
105: #endif /* ELF_BOOT_H */
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