5c5b5d4607
macros to treat the 'slice' field as a real part of the bootdev instead of as hack that spans two other fields (adaptor (sic) and controller) that are not used in any modern FreeBSD boot code. MFC after: 1 week
113 lines
4.1 KiB
C
113 lines
4.1 KiB
C
/*-
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* Copyright (C) 1994 by Rodney W. Grimes, Milwaukie, Oregon 97222
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer as
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* the first lines of this file unmodified.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Rodney W. Grimes.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY RODNEY W. GRIMES ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL RODNEY W. GRIMES BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_BOOTINFO_H_
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#define _MACHINE_BOOTINFO_H_
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/* Only change the version number if you break compatibility. */
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#define BOOTINFO_VERSION 1
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#define N_BIOS_GEOM 8
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/*
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* A zero bootinfo field often means that there is no info available.
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* Flags are used to indicate the validity of fields where zero is a
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* normal value.
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*/
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struct bootinfo {
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u_int32_t bi_version;
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u_int32_t bi_kernelname; /* represents a char * */
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u_int32_t bi_nfs_diskless; /* struct nfs_diskless * */
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/* End of fields that are always present. */
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#define bi_endcommon bi_n_bios_used
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u_int32_t bi_n_bios_used;
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u_int32_t bi_bios_geom[N_BIOS_GEOM];
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u_int32_t bi_size;
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u_int8_t bi_memsizes_valid;
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u_int8_t bi_bios_dev; /* bootdev BIOS unit number */
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u_int8_t bi_pad[2];
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u_int32_t bi_basemem;
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u_int32_t bi_extmem;
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u_int32_t bi_symtab; /* struct symtab * */
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u_int32_t bi_esymtab; /* struct symtab * */
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/* Items below only from advanced bootloader */
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u_int32_t bi_kernend; /* end of kernel space */
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u_int32_t bi_envp; /* environment */
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u_int32_t bi_modulep; /* preloaded modules */
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};
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#ifdef _KERNEL
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extern struct bootinfo bootinfo;
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#endif
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/*
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* Constants for converting boot-style device number to type,
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* adaptor (uba, mba, etc), unit number and partition number.
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* Type (== major device number) is in the low byte
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* for backward compatibility. Except for that of the "magic
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* number", each mask applies to the shifted value.
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* Format:
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* (4) (8) (4) (8) (8)
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* --------------------------------
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* |MA | SLICE | UN| PART | TYPE |
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* --------------------------------
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*/
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#define B_SLICESHIFT 20
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#define B_SLICEMASK 0xff
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#define B_SLICE(val) (((val)>>B_SLICESHIFT) & B_SLICEMASK)
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#define B_UNITSHIFT 16
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#define B_UNITMASK 0xf
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#define B_UNIT(val) (((val) >> B_UNITSHIFT) & B_UNITMASK)
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#define B_PARTITIONSHIFT 8
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#define B_PARTITIONMASK 0xff
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#define B_PARTITION(val) (((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
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#define B_TYPESHIFT 0
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#define B_TYPEMASK 0xff
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#define B_TYPE(val) (((val) >> B_TYPESHIFT) & B_TYPEMASK)
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#define B_MAGICMASK 0xf0000000
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#define B_DEVMAGIC 0xa0000000
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#define MAKEBOOTDEV(type, slice, unit, partition) \
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(((type) << B_TYPESHIFT) | ((slice) << B_SLICESHIFT) | \
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((unit) << B_UNITSHIFT) | ((partition) << B_PARTITIONSHIFT) | \
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B_DEVMAGIC)
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#define BASE_SLICE 2
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#define COMPATIBILITY_SLICE 0
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#define MAX_SLICES 32
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#define WHOLE_DISK_SLICE 1
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#endif /* !_MACHINE_BOOTINFO_H_ */
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