/* $OpenBSD: pciprobe.c,v 1.11 2023/07/24 14:02:36 jsg 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 #include #include #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, lastbus; /* PCI BIOS v2.0c+ - Installation Check */ __asm volatile(DOINT(0x1A) : "=a" (hw_chars), "=b" (rev), "=c" (lastbus), "=d" (sig), "=D" (entry32), "=@ccc" (rc) : "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 = lastbus & 0xFF; addbootarg(BOOTARG_PCIINFO, sizeof(bios_pciinfo_t), &bpi); }