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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 */ |