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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 */