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