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/* $OpenBSD: pciprobe.c,v 1.9 2008/10/04 23:08:22 deraadt Exp $ */
/*
* Copyright (c) 1997 Tobias Weingartner
* 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 REGENTS OR CONTRIBUTORS 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.
*
*/
#include <sys/param.h>
#include <stand/boot/bootarg.h>
#include <machine/biosvar.h>
#include "libsa.h"
#define PCI_SIG 0x20494350 /* PCI Signature */
void
pciprobe(void)
{
bios_pciinfo_t bpi;
u_int32_t hw_chars, rev, rc, sig;
u_int32_t entry32;
/* PCI BIOS v2.0c+ - Installation Check */
__asm __volatile(DOINT(0x1A) "; shll $8,%2; setc %b2"
: "=a" (hw_chars), "=b" (rev), "=c" (rc),
"=d" (sig), "=D" (entry32)
: "0" (0xB101), "4" (0x0)
: "cc");
if (rc & 0xff || hw_chars & 0xff00)
return;
if (sig != PCI_SIG)
return;
printf(" pci");
#ifdef DEBUG
printf("[V%d.%d, %x 0x%x %d]", (rev>>8)&0xFF, (rev&0xFF),
hw_chars, entry32, (rc>>8)&0xFF);
#endif
bpi.pci_chars = hw_chars & 0xFFFF;
bpi.pci_rev = rev & 0xFFFF;
bpi.pci_entry32 = entry32;
bpi.pci_lastbus = (rc>>8) & 0xFF;
addbootarg(BOOTARG_PCIINFO, sizeof(bios_pciinfo_t), &bpi);
}
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