Annotation of sys/arch/i386/stand/libsa/pciprobe.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: pciprobe.c,v 1.8 2004/03/09 19:12:13 tom Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1997 Tobias Weingartner
! 5: * All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: *
! 16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 18: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 19: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 20: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 21: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 22: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 23: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 24: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 25: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 26: * SUCH DAMAGE.
! 27: *
! 28: */
! 29:
! 30: #include <sys/param.h>
! 31: #include <stand/boot/bootarg.h>
! 32: #include <machine/biosvar.h>
! 33: #include "libsa.h"
! 34:
! 35: #define PCI_SIG 0x20494350 /* PCI Signature */
! 36:
! 37: void
! 38: pciprobe(void)
! 39: {
! 40: bios_pciinfo_t bpi;
! 41: u_int32_t hw_chars, rev, rc, sig;
! 42: u_int32_t entry32;
! 43:
! 44: /* PCI BIOS v2.0c+ - Installation Check */
! 45: __asm __volatile(DOINT(0x1A) "; shll $8,%2; setc %b2"
! 46: : "=a" (hw_chars), "=b" (rev), "=c" (rc),
! 47: "=d" (sig), "=D" (entry32)
! 48: : "0" (0xB101), "4" (0x0)
! 49: : "cc");
! 50:
! 51: if (rc & 0xff00 || hw_chars & 0xff00)
! 52: return;
! 53: if (sig != PCI_SIG)
! 54: return;
! 55:
! 56: printf(" pci");
! 57: #ifdef DEBUG
! 58: printf("[V%d.%d, %x 0x%x %d]", (rev>>8)&0xFF, (rev&0xFF),
! 59: hw_chars, entry32, (rc>>8)&0xFF);
! 60: #endif
! 61:
! 62: bpi.pci_chars = hw_chars & 0xFFFF;
! 63: bpi.pci_rev = rev & 0xFFFF;
! 64: bpi.pci_entry32 = entry32;
! 65: bpi.pci_lastbus = (rc>>8) & 0xFF;
! 66:
! 67: addbootarg(BOOTARG_PCIINFO, sizeof(bios_pciinfo_t), &bpi);
! 68: }
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