96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
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/*
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* asm/bootinfo.h -- Definition of the Linux/m68k boot information structure
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*
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* Copyright 1992 by Greg Harp
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*/
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#ifndef _UAPI_ASM_M68K_BOOTINFO_H
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#define _UAPI_ASM_M68K_BOOTINFO_H
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#include <linux/types.h>
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#ifndef __ASSEMBLY__
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/*
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* Bootinfo definitions
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*
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* This is an easily parsable and extendable structure containing all
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* information to be passed from the bootstrap to the kernel.
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*
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* This way I hope to keep all future changes back/forewards compatible.
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* Thus, keep your fingers crossed...
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*
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* This structure is copied right after the kernel by the bootstrap
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* routine.
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*/
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struct bi_record {
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unsigned short tag; /* tag ID */
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unsigned short size; /* size of record (in bytes) */
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unsigned long data[0]; /* data */
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};
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#endif /* __ASSEMBLY__ */
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/*
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* Tag Definitions
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*
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* Machine independent tags start counting from 0x0000
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* Machine dependent tags start counting from 0x8000
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*/
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#define BI_LAST 0x0000 /* last record (sentinel) */
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#define BI_MACHTYPE 0x0001 /* machine type (u_long) */
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#define BI_CPUTYPE 0x0002 /* cpu type (u_long) */
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#define BI_FPUTYPE 0x0003 /* fpu type (u_long) */
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#define BI_MMUTYPE 0x0004 /* mmu type (u_long) */
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#define BI_MEMCHUNK 0x0005 /* memory chunk address and size */
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/* (struct mem_info) */
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#define BI_RAMDISK 0x0006 /* ramdisk address and size */
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/* (struct mem_info) */
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#define BI_COMMAND_LINE 0x0007 /* kernel command line parameters */
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/* (string) */
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/*
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* Stuff for bootinfo interface versioning
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*
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* At the start of kernel code, a 'struct bootversion' is located.
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* bootstrap checks for a matching version of the interface before booting
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* a kernel, to avoid user confusion if kernel and bootstrap don't work
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* together :-)
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*
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* If incompatible changes are made to the bootinfo interface, the major
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* number below should be stepped (and the minor reset to 0) for the
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* appropriate machine. If a change is backward-compatible, the minor
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* should be stepped. "Backwards-compatible" means that booting will work,
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* but certain features may not.
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*/
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#define BOOTINFOV_MAGIC 0x4249561A /* 'BIV^Z' */
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#define MK_BI_VERSION(major, minor) (((major) << 16) + (minor))
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#define BI_VERSION_MAJOR(v) (((v) >> 16) & 0xffff)
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#define BI_VERSION_MINOR(v) ((v) & 0xffff)
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#ifndef __ASSEMBLY__
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struct bootversion {
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unsigned short branch;
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unsigned long magic;
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struct {
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unsigned long machtype;
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unsigned long version;
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} machversions[0];
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} __packed;
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#endif /* __ASSEMBLY__ */
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#endif /* _UAPI_ASM_M68K_BOOTINFO_H */
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