minix/sys/arch/i386/stand/lib/biospci.c

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/* $NetBSD: biospci.c,v 1.5 2008/12/14 17:03:43 christos Exp $ */
/*
* Copyright (c) 1996
* Matthias Drochner. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* basic PCI functions for libsa needs lowlevel parts from bios_pci.S
*/
#include <lib/libsa/stand.h>
#include "pcivar.h"
extern int pcibios_present(int *);
extern int pcibios_finddev(int, int, int, unsigned int *);
extern int pcibios_cfgread(unsigned int, int, int *);
extern int pcibios_cfgwrite(unsigned int, int, int);
#define PCISIG ('P' | ('C' << 8) | ('I' << 16) | (' ' << 24))
int
pcicheck(void)
{
int ret, sig;
ret = pcibios_present(&sig);
if ((ret & 0xff00) || (sig != PCISIG))
return -1;
return 0;
}
int
pcifinddev(int vid, int did, pcihdl_t *handle)
{
int ret;
*handle = 0;
ret = pcibios_finddev(vid, did, 0, handle);
if (ret)
return -1;
return 0;
}
int
pcicfgread(pcihdl_t *handle, int off, int *val)
{
int ret;
ret = pcibios_cfgread(*handle, off, val);
if (ret)
return -1;
return 0;
}
int
pcicfgwrite(pcihdl_t *handle, int off, int val)
{
int ret;
ret = pcibios_cfgwrite(*handle, off, val);
if (ret)
return -1;
return 0;
}