scoutos / prex-0.9.0 / bsp / hal / x86 / pc / machdep.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 2005-2009, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | /*
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31 | * machdep.c - machine-dependent functions for HAL
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32 | */
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33 | |||
34 | #include <kernel.h> |
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35 | #include <page.h> |
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36 | #include <machine/syspage.h> |
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37 | #include <sys/power.h> |
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38 | #include <sys/bootinfo.h> |
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39 | #include <mmu.h> |
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40 | #include <cpu.h> |
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41 | #include <cpufunc.h> |
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42 | #include <locore.h> |
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43 | |||
44 | |||
45 | #ifdef CONFIG_MMU
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46 | /*
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47 | * Virtual and physical address mapping
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48 | *
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49 | * { virtual, physical, size, type }
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50 | */
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51 | static struct mmumap mmumap_table[] = |
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52 | { |
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53 | /*
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54 | * RAM
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55 | */
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56 | { 0x80000000, 0x00000000, AUTOSIZE, VMT_RAM }, |
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57 | |||
58 | { 0,0,0,0 } |
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59 | }; |
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60 | #endif
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61 | |||
62 | /*
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63 | * Idle
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64 | */
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65 | void
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66 | machine_idle(void)
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67 | { |
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68 | |||
69 | cpu_idle(); |
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70 | } |
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71 | |||
72 | /*
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73 | * Cause an i386 machine reset.
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74 | */
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75 | static void |
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76 | machine_reset(void)
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77 | { |
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78 | int i;
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79 | |||
80 | /*
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81 | * Try to do keyboard reset.
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82 | */
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83 | outb(0x64, 0xfe); |
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84 | for (i = 0; i < 10000; i++) |
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85 | outb(0x80, 0); |
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86 | |||
87 | /*
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88 | * Do cpu reset.
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89 | */
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90 | cpu_reset(); |
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91 | |||
92 | /* NOTREACHED */
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93 | } |
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94 | |||
95 | /*
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96 | * Power down system.
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97 | */
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98 | void
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99 | machine_powerdown(int state)
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100 | { |
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101 | |||
102 | splhigh(); |
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103 | |||
104 | DPRINTF(("Power down machine\n\n"));
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105 | |||
106 | switch (state) {
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107 | case PWR_SUSPEND:
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108 | case PWR_OFF:
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109 | for (;;)
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110 | cpu_idle(); |
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111 | /* NOTREACHED */
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112 | break;
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113 | case PWR_REBOOT:
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114 | machine_reset(); |
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115 | /* NOTREACHED */
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116 | break;
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117 | } |
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118 | } |
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119 | |||
120 | /*
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121 | * Get pointer to the boot information.
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122 | */
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123 | void
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124 | machine_bootinfo(struct bootinfo **bip)
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125 | { |
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126 | ASSERT(bip != NULL);
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127 | |||
128 | *bip = (struct bootinfo *)BOOTINFO;
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129 | } |
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130 | |||
131 | void
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132 | machine_abort(void)
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133 | { |
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134 | |||
135 | for (;;) ;
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136 | } |
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137 | |||
138 | /*
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139 | * Machine-dependent startup code
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140 | */
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141 | void
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142 | machine_startup(void)
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143 | { |
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144 | #ifdef CONFIG_MMU
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145 | struct bootinfo *bi = (struct bootinfo *)BOOTINFO; |
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146 | #endif
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147 | |||
148 | /*
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149 | * Initialize CPU and basic hardware.
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150 | */
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151 | cpu_init(); |
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152 | cache_init(); |
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153 | |||
154 | /*
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155 | * Reserve system pages.
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156 | */
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157 | page_reserve(kvtop(SYSPAGE), SYSPAGESZ); |
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158 | |||
159 | #ifdef CONFIG_MMU
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160 | /*
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161 | * Modify page mapping
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162 | * We assume the first block in ram[] for x86 is main memory.
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163 | */
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164 | mmumap_table[0].size = bi->ram[0].size; |
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165 | |||
166 | /*
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167 | * Initialize MMU
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168 | */
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169 | mmu_init(mmumap_table); |
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170 | #endif
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171 | } |