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1da177e4 LT |
1 | /* |
2 | * Non-machine dependent bootinfo structure. Basic idea | |
3 | * borrowed from the m68k. | |
4 | * | |
5 | * Copyright (C) 1999 Cort Dougan <cort@ppc.kernel.org> | |
6 | * Copyright (c) 2001 PPC64 Team, IBM Corp | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | ||
15 | #ifndef _PPC64_BOOTINFO_H | |
16 | #define _PPC64_BOOTINFO_H | |
17 | ||
18 | #include <asm/types.h> | |
19 | ||
20 | /* We use a u32 for the type of the fields since they're written by | |
21 | * the bootloader which is a 32-bit process and read by the kernel | |
22 | * which is a 64-bit process. This way they can both agree on the | |
23 | * size of the type. | |
24 | */ | |
25 | typedef u32 bi_rec_field; | |
26 | ||
27 | struct bi_record { | |
28 | bi_rec_field tag; /* tag ID */ | |
29 | bi_rec_field size; /* size of record (in bytes) */ | |
30 | bi_rec_field data[0]; /* data */ | |
31 | }; | |
32 | ||
33 | #define BI_FIRST 0x1010 /* first record - marker */ | |
34 | #define BI_LAST 0x1011 /* last record - marker */ | |
35 | #define BI_CMD_LINE 0x1012 | |
36 | #define BI_BOOTLOADER_ID 0x1013 | |
37 | #define BI_INITRD 0x1014 | |
38 | #define BI_SYSMAP 0x1015 | |
39 | #define BI_MACHTYPE 0x1016 | |
40 | ||
41 | static __inline__ struct bi_record * bi_rec_init(unsigned long addr) | |
42 | { | |
43 | struct bi_record *bi_recs; | |
44 | bi_recs = (struct bi_record *)_ALIGN(addr, PAGE_SIZE); | |
45 | bi_recs->size = 0; | |
46 | return bi_recs; | |
47 | } | |
48 | ||
49 | static __inline__ struct bi_record * bi_rec_alloc(struct bi_record *rec, | |
50 | unsigned long args) | |
51 | { | |
52 | rec = (struct bi_record *)((unsigned long)rec + rec->size); | |
53 | rec->size = sizeof(struct bi_record) + args*sizeof(bi_rec_field); | |
54 | return rec; | |
55 | } | |
56 | ||
57 | static __inline__ struct bi_record * bi_rec_alloc_bytes(struct bi_record *rec, | |
58 | unsigned long bytes) | |
59 | { | |
60 | rec = (struct bi_record *)((unsigned long)rec + rec->size); | |
61 | rec->size = sizeof(struct bi_record) + bytes; | |
62 | return rec; | |
63 | } | |
64 | ||
65 | static __inline__ struct bi_record * bi_rec_next(struct bi_record *rec) | |
66 | { | |
67 | return (struct bi_record *)((unsigned long)rec + rec->size); | |
68 | } | |
69 | ||
70 | #endif /* _PPC64_BOOTINFO_H */ |