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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: }