1 /* $OpenBSD: machdep.c,v 1.8 2019/05/10 21:20:43 mlarkin Exp $ */
2
3 /*
4 * Copyright (c) 2004 Tom Cosgrove
5 * Copyright (c) 1997-1999 Michael Shalayeff
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
26 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "libsa.h"
31 #include "biosdev.h"
32 #include <machine/apmvar.h>
33 #include <machine/biosvar.h>
34 #include <machine/specialreg.h>
35 #include <machine/vmmvar.h>
36
37 volatile struct BIOS_regs BIOS_regs;
38
39 #if defined(DEBUG)
40 #define CKPT(c) (*(u_int16_t*)0xb8148 = 0x4700 + (c))
41 #else
42 #define CKPT(c) /* c */
43 #endif
44
45 const char *vmm_hv_signature = VMM_HV_SIGNATURE;
46
47 void
machdep(void)48 machdep(void)
49 {
50 int i, j, vmm = 0;
51 struct i386_boot_probes *pr;
52 uint32_t dummy, ebx, ecx, edx;
53 dev_t dev;
54
55 /*
56 * The list of probe routines is now in conf.c.
57 */
58 for (i = 0; i < nibprobes; i++) {
59 pr = &probe_list[i];
60 if (pr != NULL) {
61 printf("%s:", pr->name);
62
63 for (j = 0; j < pr->count; j++) {
64 (*(pr->probes)[j])();
65 }
66
67 printf("\n");
68 }
69 }
70
71 CPUID(0x1, dummy, dummy, ecx, dummy);
72 if (ecx & CPUIDECX_HV) {
73 CPUID(0x40000000, dummy, ebx, ecx, edx);
74 if (memcmp(&ebx, &vmm_hv_signature[0], sizeof(uint32_t)) == 0 &&
75 memcmp(&ecx, &vmm_hv_signature[4], sizeof(uint32_t)) == 0 &&
76 memcmp(&edx, &vmm_hv_signature[8], sizeof(uint32_t)) == 0)
77 vmm = 1;
78 }
79
80 /* Set console to com0/115200 by default in vmm */
81 if (vmm) {
82 dev = ttydev("com0");
83 cnspeed(dev, 115200);
84 cnset(dev);
85 }
86 }
87
88 int
check_skip_conf(void)89 check_skip_conf(void)
90 {
91 /* Return non-zero (skip boot.conf) if Control "shift" key down */
92 return (pc_getshifts(0) & 0x04);
93 }
94