1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
/*-
* 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/bios/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];
} __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);
}
|
