]>
Commit | Line | Data |
---|---|---|
d8678b58 GL |
1 | /* |
2 | * Definitions for working with the Flattened Device Tree data format | |
3 | * | |
4 | * Copyright 2009 Benjamin Herrenschmidt, IBM Corp | |
5 | * benh@kernel.crashing.org | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * version 2 as published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #ifndef _LINUX_OF_FDT_H | |
13 | #define _LINUX_OF_FDT_H | |
14 | ||
15 | /* Definitions used by the flattened device tree */ | |
16 | #define OF_DT_HEADER 0xd00dfeed /* marker */ | |
17 | #define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */ | |
18 | #define OF_DT_END_NODE 0x2 /* End node */ | |
19 | #define OF_DT_PROP 0x3 /* Property: name off, size, | |
20 | * content */ | |
21 | #define OF_DT_NOP 0x4 /* nop */ | |
22 | #define OF_DT_END 0x9 | |
23 | ||
24 | #define OF_DT_VERSION 0x10 | |
25 | ||
d45d94f6 GL |
26 | #ifndef __ASSEMBLY__ |
27 | /* | |
28 | * This is what gets passed to the kernel by prom_init or kexec | |
29 | * | |
30 | * The dt struct contains the device tree structure, full pathes and | |
31 | * property contents. The dt strings contain a separate block with just | |
32 | * the strings for the property names, and is fully page aligned and | |
33 | * self contained in a page, so that it can be kept around by the kernel, | |
34 | * each property name appears only once in this page (cheap compression) | |
35 | * | |
36 | * the mem_rsvmap contains a map of reserved ranges of physical memory, | |
37 | * passing it here instead of in the device-tree itself greatly simplifies | |
38 | * the job of everybody. It's just a list of u64 pairs (base/size) that | |
39 | * ends when size is 0 | |
40 | */ | |
41 | struct boot_param_header { | |
42 | u32 magic; /* magic word OF_DT_HEADER */ | |
43 | u32 totalsize; /* total size of DT block */ | |
44 | u32 off_dt_struct; /* offset to structure */ | |
45 | u32 off_dt_strings; /* offset to strings */ | |
46 | u32 off_mem_rsvmap; /* offset to memory reserve map */ | |
47 | u32 version; /* format version */ | |
48 | u32 last_comp_version; /* last compatible version */ | |
49 | /* version 2 fields below */ | |
50 | u32 boot_cpuid_phys; /* Physical CPU id we're booting on */ | |
51 | /* version 3 fields below */ | |
52 | u32 dt_strings_size; /* size of the DT strings block */ | |
53 | /* version 17 fields below */ | |
54 | u32 dt_struct_size; /* size of the DT structure block */ | |
55 | }; | |
56 | ||
57 | #endif /* __ASSEMBLY__ */ | |
d8678b58 | 58 | #endif /* _LINUX_OF_FDT_H */ |