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