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/*
* asm/bootinfo.h -- Definition of the Linux/m68k boot information structure
*
* Copyright 1992 by Greg Harp
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#ifndef _UAPI_ASM_M68K_BOOTINFO_H
#define _UAPI_ASM_M68K_BOOTINFO_H
#ifndef __ASSEMBLY__
/*
* Bootinfo definitions
*
* This is an easily parsable and extendable structure containing all
* information to be passed from the bootstrap to the kernel.
*
* This way I hope to keep all future changes back/forewards compatible.
* Thus, keep your fingers crossed...
*
* This structure is copied right after the kernel by the bootstrap
* routine.
*/
struct bi_record {
unsigned short tag; /* tag ID */
unsigned short size; /* size of record (in bytes) */
unsigned long data[0]; /* data */
};
struct mem_info {
unsigned long addr; /* physical address of memory chunk */
unsigned long size; /* length of memory chunk (in bytes) */
};
#endif /* __ASSEMBLY__ */
/*
* Tag Definitions
*
* Machine independent tags start counting from 0x0000
* Machine dependent tags start counting from 0x8000
*/
#define BI_LAST 0x0000 /* last record (sentinel) */
#define BI_MACHTYPE 0x0001 /* machine type (u_long) */
#define BI_CPUTYPE 0x0002 /* cpu type (u_long) */
#define BI_FPUTYPE 0x0003 /* fpu type (u_long) */
#define BI_MMUTYPE 0x0004 /* mmu type (u_long) */
#define BI_MEMCHUNK 0x0005 /* memory chunk address and size */
/* (struct mem_info) */
#define BI_RAMDISK 0x0006 /* ramdisk address and size */
/* (struct mem_info) */
#define BI_COMMAND_LINE 0x0007 /* kernel command line parameters */
/* (string) */
/*
* Linux/m68k Architectures (BI_MACHTYPE)
*/
#define MACH_AMIGA 1
#define MACH_ATARI 2
#define MACH_MAC 3
#define MACH_APOLLO 4
#define MACH_SUN3 5
#define MACH_MVME147 6
#define MACH_MVME16x 7
#define MACH_BVME6000 8
#define MACH_HP300 9
#define MACH_Q40 10
#define MACH_SUN3X 11
#define MACH_M54XX 12
/*
* CPU, FPU and MMU types (BI_CPUTYPE, BI_FPUTYPE, BI_MMUTYPE)
*
* Note: we may rely on the following equalities:
*
* CPU_68020 == MMU_68851
* CPU_68030 == MMU_68030
* CPU_68040 == FPU_68040 == MMU_68040
* CPU_68060 == FPU_68060 == MMU_68060
*/
#define CPUB_68020 0
#define CPUB_68030 1
#define CPUB_68040 2
#define CPUB_68060 3
#define CPUB_COLDFIRE 4
#define CPU_68020 (1 << CPUB_68020)
#define CPU_68030 (1 << CPUB_68030)
#define CPU_68040 (1 << CPUB_68040)
#define CPU_68060 (1 << CPUB_68060)
#define CPU_COLDFIRE (1 << CPUB_COLDFIRE)
#define FPUB_68881 0
#define FPUB_68882 1
#define FPUB_68040 2 /* Internal FPU */
#define FPUB_68060 3 /* Internal FPU */
#define FPUB_SUNFPA 4 /* Sun-3 FPA */
#define FPUB_COLDFIRE 5 /* ColdFire FPU */
#define FPU_68881 (1 << FPUB_68881)
#define FPU_68882 (1 << FPUB_68882)
#define FPU_68040 (1 << FPUB_68040)
#define FPU_68060 (1 << FPUB_68060)
#define FPU_SUNFPA (1 << FPUB_SUNFPA)
#define FPU_COLDFIRE (1 << FPUB_COLDFIRE)
#define MMUB_68851 0
#define MMUB_68030 1 /* Internal MMU */
#define MMUB_68040 2 /* Internal MMU */
#define MMUB_68060 3 /* Internal MMU */
#define MMUB_APOLLO 4 /* Custom Apollo */
#define MMUB_SUN3 5 /* Custom Sun-3 */
#define MMUB_COLDFIRE 6 /* Internal MMU */
#define MMU_68851 (1 << MMUB_68851)
#define MMU_68030 (1 << MMUB_68030)
#define MMU_68040 (1 << MMUB_68040)
#define MMU_68060 (1 << MMUB_68060)
#define MMU_SUN3 (1 << MMUB_SUN3)
#define MMU_APOLLO (1 << MMUB_APOLLO)
#define MMU_COLDFIRE (1 << MMUB_COLDFIRE)
/*
* Stuff for bootinfo interface versioning
*
* At the start of kernel code, a 'struct bootversion' is located.
* bootstrap checks for a matching version of the interface before booting
* a kernel, to avoid user confusion if kernel and bootstrap don't work
* together :-)
*
* If incompatible changes are made to the bootinfo interface, the major
* number below should be stepped (and the minor reset to 0) for the
* appropriate machine. If a change is backward-compatible, the minor
* should be stepped. "Backwards-compatible" means that booting will work,
* but certain features may not.
*/
#define BOOTINFOV_MAGIC 0x4249561A /* 'BIV^Z' */
#define MK_BI_VERSION(major, minor) (((major) << 16) + (minor))
#define BI_VERSION_MAJOR(v) (((v) >> 16) & 0xffff)
#define BI_VERSION_MINOR(v) ((v) & 0xffff)
#ifndef __ASSEMBLY__
struct bootversion {
unsigned short branch;
unsigned long magic;
struct {
unsigned long machtype;
unsigned long version;
} machversions[0];
} __packed;
#endif /* __ASSEMBLY__ */
#endif /* _UAPI_ASM_M68K_BOOTINFO_H */
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