sys/i386/bios/mca_machdep.c

   1 /*-
   2  * Copyright (c) 1999 Matthew N. Dodd <winter@jurai.net>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/kernel.h>
  33 #include <vm/vm.h>
  34 #include <vm/vm_param.h>
  35 #include <vm/pmap.h>
  36 #include <machine/md_var.h>
  37 #include <machine/vm86.h>
  38 #include <machine/pc/bios.h>
  39 #include <machine/cpufunc.h>
  40
  41 #include <dev/mca/mca_busreg.h>
  42 #include <i386/bios/mca_machdep.h>
  43
  44 /* Global MCA bus flag */
  45 int MCA_system = 0;
  46
  47 /* System Configuration Block */
  48 struct sys_config {
  49         u_int16_t       count;
  50         u_int8_t        model;
  51         u_int8_t        submodel;
  52         u_int8_t        bios_rev;
  53         u_int8_t        feature;
  54 #define FEATURE_MCAISA  0x01    /* Machine contains both MCA and ISA bus*/
  55 #define FEATURE_MCABUS  0x02    /* MicroChannel Architecture            */
  56 #define FEATURE_EBDA    0x04    /* Extended BIOS data area allocated    */
  57 #define FEATURE_WAITEV  0x08    /* Wait for external event is supported */
  58 #define FEATURE_KBDINT  0x10    /* Keyboard intercept called by Int 09h */
  59 #define FEATURE_RTC     0x20    /* Real-time clock present              */
  60 #define FEATURE_IC2     0x40    /* Second interrupt chip present        */
  61 #define FEATURE_DMA3    0x80    /* DMA channel 3 used by hard disk BIOS */
  62         u_int8_t        pad[3];
  63 } __packed;
  64
  65 /* Function Prototypes */
  66 static void bios_mcabus_present (void *);
  67 SYSINIT(mca_present, SI_SUB_CPU, SI_ORDER_ANY, bios_mcabus_present, NULL);
  68
  69 /* Functions */
  70 static void
  71 bios_mcabus_present(void * dummy)
  72 {
  73         struct vm86frame        vmf;
  74         struct sys_config *     scp;
  75         vm_offset_t             paddr;
  76
  77         bzero(&vmf, sizeof(struct vm86frame));
  78
  79         vmf.vmf_ah = 0xc0;
  80         if (vm86_intcall(0x15, &vmf)) {
  81                 if (bootverbose) {
  82                         printf("BIOS SDT: INT call failed.\n");
  83                 }
  84                 return;
  85         }
  86
  87         if ((vmf.vmf_ah != 0) && (vmf.vmf_flags & 0x01)) {
  88                 if (bootverbose) {
  89                         printf("BIOS SDT: Not supported.  Not PS/2?\n");
  90                         printf("BIOS SDT: AH 0x%02x, Flags 0x%04x\n",
  91                                 vmf.vmf_ah, vmf.vmf_flags);
  92                 }
  93                 return;
  94         }
  95
  96         paddr = vmf.vmf_es;
  97         paddr = (paddr << 4) + vmf.vmf_bx;
  98         scp = (struct sys_config *)BIOS_PADDRTOVADDR(paddr);
  99
 100         if (bootverbose) {
 101                 printf("BIOS SDT: model 0x%02x, submodel 0x%02x, bios_rev 0x%02x\n",
 102                         scp->model, scp->submodel, scp->bios_rev);
 103                 printf("BIOS SDT: features 0x%b\n", scp->feature,
 104                         "\20"
 105                         "\01MCA+ISA"
 106                         "\02MCA"
 107                         "\03EBDA"
 108                         "\04WAITEV"
 109                         "\05KBDINT"
 110                         "\06RTC"
 111                         "\07IC2"
 112                         "\08DMA3"
 113                         "\n");
 114         }
 115
 116         MCA_system = ((scp->feature & FEATURE_MCABUS) ? 1 : 0);
 117
 118         if (MCA_system)
 119                 printf("MicroChannel Architecture System detected.\n");
 120
 121         return;
 122 }
 123
 124 int
 125 mca_bus_nmi (void)
 126 {
 127         int     slot;
 128         int     retval = 0;
 129         int     pos5 = 0;
 130
 131         /* Disable motherboard setup */
 132         outb(MCA_MB_SETUP_REG, MCA_MB_SETUP_DIS);
 133
 134         /* For each slot */
 135         for (slot = 0; slot < MCA_MAX_SLOTS; slot++) {
 136
 137                 /* Select the slot */
 138                 outb(MCA_ADAP_SETUP_REG, slot | MCA_ADAP_SET);
 139                 pos5 = inb(MCA_POS_REG(MCA_POS5));
 140
 141                 /* If Adapter Check is low */
 142                 if ((pos5 & MCA_POS5_CHCK) == 0) {
 143                         retval++;
 144
 145                         /* If Adapter Check Status is available */
 146                         if ((pos5 & MCA_POS5_CHCK_STAT) == 0) {
 147                                 printf("MCA NMI: slot %d, POS6=0x%02x, POS7=0x%02x\n",
 148                                         slot+1,
 149                                         inb( MCA_POS_REG(MCA_POS6) ),
 150                                         inb( MCA_POS_REG(MCA_POS7) ));
 151                         } else {
 152                                 printf("MCA NMI: slot %d\n", slot+1);
 153                         }
 154                 }
 155                 /* Disable adapter setup */
 156                 outb(MCA_ADAP_SETUP_REG, MCA_ADAP_SETUP_DIS);
 157         }
 158
 159         return (retval);
 160 }