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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 */
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