bootinfo.h
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上传日期:2013-04-10
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- /*
- * Non-machine dependent bootinfo structure. Basic idea
- * borrowed from the m68k.
- *
- * Copyright (C) 1999 Cort Dougan <cort@ppc.kernel.org>
- * Copyright (c) 2001 PPC64 Team, IBM Corp
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #ifndef _PPC64_BOOTINFO_H
- #define _PPC64_BOOTINFO_H
- #include <asm/types.h>
- /* We use a u32 for the type of the fields since they're written by
- * the bootloader which is a 32-bit process and read by the kernel
- * which is a 64-bit process. This way they can both agree on the
- * size of the type.
- */
- typedef u32 bi_rec_field;
- struct bi_record {
- bi_rec_field tag; /* tag ID */
- bi_rec_field size; /* size of record (in bytes) */
- bi_rec_field data[0]; /* data */
- };
- #define BI_FIRST 0x1010 /* first record - marker */
- #define BI_LAST 0x1011 /* last record - marker */
- #define BI_CMD_LINE 0x1012
- #define BI_BOOTLOADER_ID 0x1013
- #define BI_INITRD 0x1014
- #define BI_SYSMAP 0x1015
- #define BI_MACHTYPE 0x1016
- static __inline__ struct bi_record * bi_rec_init(unsigned long addr)
- {
- struct bi_record *bi_recs;
- bi_recs = (struct bi_record *)_ALIGN(addr, PAGE_SIZE);
- bi_recs->size = 0;
- return bi_recs;
- }
- static __inline__ struct bi_record * bi_rec_alloc(struct bi_record *rec,
- unsigned long args)
- {
- rec = (struct bi_record *)((unsigned long)rec + rec->size);
- rec->size = sizeof(struct bi_record) + args*sizeof(bi_rec_field);
- return rec;
- }
- static __inline__ struct bi_record * bi_rec_alloc_bytes(struct bi_record *rec,
- unsigned long bytes)
- {
- rec = (struct bi_record *)((unsigned long)rec + rec->size);
- rec->size = sizeof(struct bi_record) + bytes;
- return rec;
- }
- static __inline__ struct bi_record * bi_rec_next(struct bi_record *rec)
- {
- return (struct bi_record *)((unsigned long)rec + rec->size);
- }
- #endif /* _PPC64_BOOTINFO_H */