Return to pciprobe.c CVS log

Up to [local] / sys / arch / i386 / stand / libsa

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: }