Annotation of sys/arch/i386/stand/libsa/pciprobe.c, Revision 1.1.1.1
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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