1.\" $FreeBSD: src/share/man/man9/bios.9,v 1.4.2.6 2001/12/17 11:30:18 ru Exp $ 2.\" 3.\" Copyright (c) 1997 Michael Smith 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.Dd September 9, 2015 28.Dt BIOS 9 29.Os 30.Sh NAME 31.Nm bios_sigsearch , 32.Nm BIOS_PADDRTOVADDR , 33.Nm BIOS_VADDRTOPADDR 34.Nd interact with PC BIOS 35.Sh SYNOPSIS 36.In sys/types.h 37.In machine/pc/bios.h 38.Ft u_int32_t 39.Fn bios_sigsearch "u_int32_t start" "u_char *sig" "int siglen" "int paralen" "int sigofs" 40.Fn BIOS_PADDRTOVADDR "addr" 41.Fn BIOS_VADDRTOPADDR "addr" 42.Sh DESCRIPTION 43A number of macros and functions are available to deal with BIOS data 44encountered on x86 PC-architecture systems. 45.Bl -tag -width ".Fn BIOS_PADDRTOVADDR" 46.It Fn bios_sigsearch 47Searches the BIOS address space for a service signature, usually an 48uppercase ASCII sequence surrounded by underscores. The search begins 49at 50.Fa start , 51or at the beginning of the BIOS if 52.Fa start 53is zero. 54.Fa siglen 55bytes of the BIOS image and 56.Fa sig 57are compared at 58.Fa sigofs 59bytes offset from the current location. If no match is found, the 60current location is incremented by 61.Fa paralen 62bytes and the search repeated. If the signature is found, its effective 63physical address is returned. If no signature is found, zero is returned. 64.It Fn BIOS_VADDRTOPADDR 65Returns the effective physical address which corresponds to the kernel 66virtual address 67.Fa addr . 68.It Fn BIOS_PADDRTOVADDR 69Returns the kernel virtual address which corresponds to the effective 70physical address 71.Fa addr . 72.El 73