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160 lines
4.4 KiB
C
160 lines
4.4 KiB
C
/*-
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* Copyright (c) 1999 Matthew N. Dodd <winter@jurai.net>
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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. 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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*
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/pmap.h>
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#include <machine/md_var.h>
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#include <machine/vm86.h>
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#include <machine/pc/bios.h>
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#include <machine/cpufunc.h>
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#include <dev/mca/mca_busreg.h>
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#include <i386/bios/mca_machdep.h>
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/* Global MCA bus flag */
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int MCA_system = 0;
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/* System Configuration Block */
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struct sys_config {
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u_int16_t count;
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u_int8_t model;
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u_int8_t submodel;
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u_int8_t bios_rev;
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u_int8_t feature;
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#define FEATURE_RESV 0x01 /* Reserved */
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#define FEATURE_MCABUS 0x02 /* MicroChannel Architecture */
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#define FEATURE_EBDA 0x04 /* Extended BIOS data area allocated */
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#define FEATURE_WAITEV 0x08 /* Wait for external event is supported */
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#define FEATURE_KBDINT 0x10 /* Keyboard intercept called by Int 09h */
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#define FEATURE_RTC 0x20 /* Real-time clock present */
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#define FEATURE_IC2 0x40 /* Second interrupt chip present */
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#define FEATURE_DMA3 0x80 /* DMA channel 3 used by hard disk BIOS */
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u_int8_t pad[3];
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} __packed;
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/* Function Prototypes */
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static void bios_mcabus_present (void *);
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SYSINIT(mca_present, SI_SUB_CPU, SI_ORDER_ANY, bios_mcabus_present, NULL);
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/* Functions */
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static void
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bios_mcabus_present(void * dummy)
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{
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struct vm86frame vmf;
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struct sys_config * scp;
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vm_offset_t paddr;
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bzero(&vmf, sizeof(struct vm86frame));
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vmf.vmf_ah = 0xc0;
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if (vm86_intcall(0x15, &vmf)) {
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if (bootverbose) {
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printf("BIOS SDT: INT call failed.\n");
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}
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return;
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}
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if ((vmf.vmf_ah != 0) && (vmf.vmf_flags & 0x01)) {
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if (bootverbose) {
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printf("BIOS SDT: Not supported. Not PS/2?\n");
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printf("BIOS SDT: AH 0x%02x, Flags 0x%04x\n",
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vmf.vmf_ah, vmf.vmf_flags);
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}
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return;
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}
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paddr = vmf.vmf_es;
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paddr = (paddr << 4) + vmf.vmf_bx;
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scp = (struct sys_config *)BIOS_PADDRTOVADDR(paddr);
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if (bootverbose) {
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printf("BIOS SDT: model 0x%02x, submodel 0x%02x, bios_rev 0x%02x\n",
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scp->model, scp->submodel, scp->bios_rev);
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printf("BIOS SDT: features 0x%b\n", scp->feature,
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"\20"
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"\01RESV"
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"\02MCABUS"
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"\03EBDA"
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"\04WAITEV"
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"\05KBDINT"
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"\06RTC"
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"\07IC2"
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"\08DMA3\n");
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}
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MCA_system = ((scp->feature & FEATURE_MCABUS) ? 1 : 0);
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if (MCA_system)
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printf("MicroChannel Architecture System detected.\n");
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return;
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}
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int
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mca_bus_nmi (void)
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{
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int slot;
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int retval = 0;
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int pos5 = 0;
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/* Disable motherboard setup */
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outb(MCA_MB_SETUP_REG, MCA_MB_SETUP_DIS);
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/* For each slot */
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for (slot = 0; slot < MCA_MAX_SLOTS; slot++) {
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/* Select the slot */
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outb(MCA_ADAP_SETUP_REG, slot | MCA_ADAP_SET);
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pos5 = inb(MCA_POS_REG(MCA_POS5));
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/* If Adapter Check is low */
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if ((pos5 & MCA_POS5_CHCK) == 0) {
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retval++;
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/* If Adapter Check Status is available */
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if ((pos5 & MCA_POS5_CHCK_STAT) == 0) {
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printf("MCA NMI: slot %d, POS6=0x%02x, POS7=0x%02x\n",
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slot+1,
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inb( MCA_POS_REG(MCA_POS6) ),
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inb( MCA_POS_REG(MCA_POS7) ));
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} else {
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printf("MCA NMI: slot %d\n", slot+1);
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}
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}
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/* Disable adapter setup */
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outb(MCA_ADAP_SETUP_REG, MCA_ADAP_SETUP_DIS);
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}
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return (retval);
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}
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