Basic interface to BIOS32. Separated from UCHIYAMA Yasushi's PCI BIOS
patches and cleaned up a bit.
This commit is contained in:
thorpej
parent
f6bf35c814
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4a98f5856e
172
sys/arch/i386/i386/bios32.c
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172
sys/arch/i386/i386/bios32.c
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/* $NetBSD: bios32.c,v 1.1 1999/11/17 00:55:50 thorpej Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1999, by UCHIYAMA Yasushi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name of the developer may NOT be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Basic interface to BIOS32 services.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <dev/isa/isareg.h>
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#include <machine/isa_machdep.h>
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#include <machine/segments.h>
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#include <machine/bios32.h>
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#define BIOS32_START 0xe0000
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#define BIOS32_SIZE 0x20000
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#define BIOS32_END (BIOS32_START + BIOS32_SIZE - 0x10)
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struct bios32_entry bios32_entry;
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/*
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* Initialize the BIOS32 interface.
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*/
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void
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bios32_init()
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{
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paddr_t entry = 0;
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caddr_t p;
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unsigned char cksum;
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int i;
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for (p = (caddr_t)ISA_HOLE_VADDR(BIOS32_START);
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p < (caddr_t)ISA_HOLE_VADDR(BIOS32_END);
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p += 16) {
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if (*(int *)p != BIOS32_MAKESIG('_', '3', '2', '_'))
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continue;
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cksum = 0;
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for (i = 0; i < 16; i++)
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cksum += *(unsigned char *)(p + i);
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if (cksum != 0)
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continue;
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if (*(p + 9) != 1)
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continue;
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entry = *(u_int32_t *)(p + 4);
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printf("BIOS32 rev. %d found at 0x%lx\n",
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*(p + 8), entry);
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if (entry < BIOS32_START ||
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entry >= BIOS32_END) {
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printf("BIOS32 entry point outside "
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"allowable range\n");
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entry = 0;
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}
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break;
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}
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if (entry != 0) {
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bios32_entry.offset = (caddr_t)ISA_HOLE_VADDR(entry);
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bios32_entry.segment = GSEL(GCODE_SEL, SEL_KPL);
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}
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}
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/*
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* Call BIOS32 to locate the specified BIOS32 service, and fill
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* in the entry point information.
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*/
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int
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bios32_service(service, e, ei)
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u_int32_t service;
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bios32_entry_t e;
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bios32_entry_info_t ei;
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{
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u_int32_t eax, ebx, ecx, edx;
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paddr_t entry;
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__asm __volatile("lcall (%%edi)"
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: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
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: "0" (service), "1" (0), "D" (&bios32_entry));
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if ((eax & 0xff) != 0)
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return (0); /* service not found */
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entry = ebx + edx;
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if (entry < BIOS32_START || entry >= BIOS32_END) {
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printf("bios32: entry point for service %c%c%c%c is outside "
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"allowable range\n",
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service & 0xff,
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(service >> 8) & 0xff,
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(service >> 16) & 0xff,
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(service >> 24) & 0xff);
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return (0);
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}
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e->offset = (caddr_t)ISA_HOLE_VADDR(entry);
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e->segment = GSEL(GCODE_SEL, SEL_KPL);
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ei->bei_base = ebx;
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ei->bei_size = ecx;
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ei->bei_entry = entry;
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return (1);
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}
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84
sys/arch/i386/include/bios32.h
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84
sys/arch/i386/include/bios32.h
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@ -0,0 +1,84 @@
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/* $NetBSD: bios32.h,v 1.1 1999/11/17 00:55:51 thorpej Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1999, by UCHIYAMA Yasushi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name of the developer may NOT be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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struct bios32_entry_info {
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paddr_t bei_base;
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psize_t bei_size;
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paddr_t bei_entry;
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};
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typedef struct bios32_entry_info *bios32_entry_info_t;
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struct bios32_entry {
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caddr_t offset;
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u_int16_t segment;
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} __attribute__((__packed__));
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typedef struct bios32_entry *bios32_entry_t;
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#define BIOS32_MAKESIG(a, b, c, d) \
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((a) | ((b) << 8) | ((c) << 16) | ((d) << 24))
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void bios32_init __P((void));
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int bios32_service __P((u_int32_t, bios32_entry_t, bios32_entry_info_t));
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