scoutos / prex-0.9.0 / bsp / hal / x86 / pc / machdep.c @ 03e9c04a
History | View | Annotate | Download (3.3 KB)
1 |
/*-
|
---|---|
2 |
* Copyright (c) 2005-2009, Kohsuke Ohtani
|
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 |
* 3. Neither the name of the author nor the names of any co-contributors
|
14 |
* may be used to endorse or promote products derived from this software
|
15 |
* without specific prior written permission.
|
16 |
*
|
17 |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
18 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
19 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
20 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
21 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
22 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
23 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
24 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
26 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
27 |
* SUCH DAMAGE.
|
28 |
*/
|
29 |
|
30 |
/*
|
31 |
* machdep.c - machine-dependent functions for HAL
|
32 |
*/
|
33 |
|
34 |
#include <kernel.h> |
35 |
#include <page.h> |
36 |
#include <machine/syspage.h> |
37 |
#include <sys/power.h> |
38 |
#include <sys/bootinfo.h> |
39 |
#include <mmu.h> |
40 |
#include <cpu.h> |
41 |
#include <cpufunc.h> |
42 |
#include <locore.h> |
43 |
|
44 |
|
45 |
#ifdef CONFIG_MMU
|
46 |
/*
|
47 |
* Virtual and physical address mapping
|
48 |
*
|
49 |
* { virtual, physical, size, type }
|
50 |
*/
|
51 |
static struct mmumap mmumap_table[] = |
52 |
{ |
53 |
/*
|
54 |
* RAM
|
55 |
*/
|
56 |
{ 0x80000000, 0x00000000, AUTOSIZE, VMT_RAM }, |
57 |
|
58 |
{ 0,0,0,0 } |
59 |
}; |
60 |
#endif
|
61 |
|
62 |
/*
|
63 |
* Idle
|
64 |
*/
|
65 |
void
|
66 |
machine_idle(void)
|
67 |
{ |
68 |
|
69 |
cpu_idle(); |
70 |
} |
71 |
|
72 |
/*
|
73 |
* Cause an i386 machine reset.
|
74 |
*/
|
75 |
static void |
76 |
machine_reset(void)
|
77 |
{ |
78 |
int i;
|
79 |
|
80 |
/*
|
81 |
* Try to do keyboard reset.
|
82 |
*/
|
83 |
outb(0x64, 0xfe); |
84 |
for (i = 0; i < 10000; i++) |
85 |
outb(0x80, 0); |
86 |
|
87 |
/*
|
88 |
* Do cpu reset.
|
89 |
*/
|
90 |
cpu_reset(); |
91 |
|
92 |
/* NOTREACHED */
|
93 |
} |
94 |
|
95 |
/*
|
96 |
* Power down system.
|
97 |
*/
|
98 |
void
|
99 |
machine_powerdown(int state)
|
100 |
{ |
101 |
|
102 |
splhigh(); |
103 |
|
104 |
DPRINTF(("Power down machine\n\n"));
|
105 |
|
106 |
switch (state) {
|
107 |
case PWR_SUSPEND:
|
108 |
case PWR_OFF:
|
109 |
for (;;)
|
110 |
cpu_idle(); |
111 |
/* NOTREACHED */
|
112 |
break;
|
113 |
case PWR_REBOOT:
|
114 |
machine_reset(); |
115 |
/* NOTREACHED */
|
116 |
break;
|
117 |
} |
118 |
} |
119 |
|
120 |
/*
|
121 |
* Get pointer to the boot information.
|
122 |
*/
|
123 |
void
|
124 |
machine_bootinfo(struct bootinfo **bip)
|
125 |
{ |
126 |
ASSERT(bip != NULL);
|
127 |
|
128 |
*bip = (struct bootinfo *)BOOTINFO;
|
129 |
} |
130 |
|
131 |
void
|
132 |
machine_abort(void)
|
133 |
{ |
134 |
|
135 |
for (;;) ;
|
136 |
} |
137 |
|
138 |
/*
|
139 |
* Machine-dependent startup code
|
140 |
*/
|
141 |
void
|
142 |
machine_startup(void)
|
143 |
{ |
144 |
#ifdef CONFIG_MMU
|
145 |
struct bootinfo *bi = (struct bootinfo *)BOOTINFO; |
146 |
#endif
|
147 |
|
148 |
/*
|
149 |
* Initialize CPU and basic hardware.
|
150 |
*/
|
151 |
cpu_init(); |
152 |
cache_init(); |
153 |
|
154 |
/*
|
155 |
* Reserve system pages.
|
156 |
*/
|
157 |
page_reserve(kvtop(SYSPAGE), SYSPAGESZ); |
158 |
|
159 |
#ifdef CONFIG_MMU
|
160 |
/*
|
161 |
* Modify page mapping
|
162 |
* We assume the first block in ram[] for x86 is main memory.
|
163 |
*/
|
164 |
mmumap_table[0].size = bi->ram[0].size; |
165 |
|
166 |
/*
|
167 |
* Initialize MMU
|
168 |
*/
|
169 |
mmu_init(mmumap_table); |
170 |
#endif
|
171 |
} |