diff options
Diffstat (limited to 'sys/arch/i386/stand/libsa/pciprobe.c')
| -rw-r--r-- | sys/arch/i386/stand/libsa/pciprobe.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/sys/arch/i386/stand/libsa/pciprobe.c b/sys/arch/i386/stand/libsa/pciprobe.c new file mode 100644 index 00000000000..7ba6d2cda55 --- /dev/null +++ b/sys/arch/i386/stand/libsa/pciprobe.c @@ -0,0 +1,74 @@ +/* $OpenBSD: pciprobe.c,v 1.1 1998/02/24 22:07:46 weingart 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Tobias Weingartner. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * 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 <sys/param.h> +#include <stand/boot/bootarg.h> +#include <machine/biosvar.h> +#include "libsa.h" + +#define PCI_SIG 0x20494350 /* PCI Signature */ + +void +pciprobe() +{ + bios_pciinfo_t bpi; + u_int32_t hw_chars, rev, rc, sig; + u_int32_t entry32; + + /* PCI BIOS v2.0c+ - Installation Check */ + __asm __volatile(DOINT(0x1A) ";shll $8,%2; setc %b2" + : "=a" (hw_chars), "=b" (rev), "=c" (rc), + "=d" (sig), "=D" (entry32) + : "0" (0xB101), "D" (0x0) + : "cc", "eax", "ebx", "ecx", "edx"); + + if (rc & 0xff00 || hw_chars & 0xff00) + return; + if (sig != PCI_SIG) + return; + + printf(" pci"); +#ifdef DEBUG + printf("[ver %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 = (rc>>8) & 0xFF; + + addbootarg(BOOTARG_PCIINFO, sizeof(bios_pciinfo_t), &bpi); +} + |