vt.c

linux字符驱动源码

 <a name=L93 href="source/kernel/chr_drv/vt.c?v=0.97#L93">93</a> <b><i>                 * KDADDIO and KDDELIO may be able to add ports beyond what</i></b>
 <a name=L94 href="source/kernel/chr_drv/vt.c?v=0.97#L94">94</a> <b><i>                 * we reject here, but to be safe...</i></b>
 <a name=L95 href="source/kernel/chr_drv/vt.c?v=0.97#L95">95</a> <b><i>                 */</i></b>
 <a name=L96 href="source/kernel/chr_drv/vt.c?v=0.97#L96">96</a>                 if (arg &lt; <a href="ident?v=0.97;i=GPFIRST">GPFIRST</a> || arg &gt; <a href="ident?v=0.97;i=GPLAST">GPLAST</a>)
 <a name=L97 href="source/kernel/chr_drv/vt.c?v=0.97#L97">97</a>                         return -<a href="ident?v=0.97;i=EINVAL">EINVAL</a>;
 <a name=L98 href="source/kernel/chr_drv/vt.c?v=0.97#L98">98</a>                 return <a href="ident?v=0.97;i=sys_ioperm">sys_ioperm</a>(arg, 1, (cmd == <a href="ident?v=0.97;i=KDADDIO">KDADDIO</a>)) ? -<a href="ident?v=0.97;i=ENXIO">ENXIO</a> : 0;
 <a name=L99 href="source/kernel/chr_drv/vt.c?v=0.97#L99">99</a> 
<a name=L100 href="source/kernel/chr_drv/vt.c?v=0.97#L100">100</a>         case <a href="ident?v=0.97;i=KDENABIO">KDENABIO</a>:
<a name=L101 href="source/kernel/chr_drv/vt.c?v=0.97#L101">101</a>         case <a href="ident?v=0.97;i=KDDISABIO">KDDISABIO</a>:
<a name=L102 href="source/kernel/chr_drv/vt.c?v=0.97#L102">102</a>                 return <a href="ident?v=0.97;i=sys_ioperm">sys_ioperm</a>(<a href="ident?v=0.97;i=GPFIRST">GPFIRST</a>, <a href="ident?v=0.97;i=GPNUM">GPNUM</a>,
<a name=L103 href="source/kernel/chr_drv/vt.c?v=0.97#L103">103</a>                                   (cmd == <a href="ident?v=0.97;i=KDENABIO">KDENABIO</a>)) ? -<a href="ident?v=0.97;i=ENXIO">ENXIO</a> : 0;
<a name=L104 href="source/kernel/chr_drv/vt.c?v=0.97#L104">104</a> 
<a name=L105 href="source/kernel/chr_drv/vt.c?v=0.97#L105">105</a>         case <a href="ident?v=0.97;i=KDSETMODE">KDSETMODE</a>:
<a name=L106 href="source/kernel/chr_drv/vt.c?v=0.97#L106">106</a>                 <b><i>/*</i></b>
<a name=L107 href="source/kernel/chr_drv/vt.c?v=0.97#L107">107</a> <b><i>                 * currently, setting the mode from KD_TEXT to KD_GRAPHICS</i></b>
<a name=L108 href="source/kernel/chr_drv/vt.c?v=0.97#L108">108</a> <b><i>                 * doesn't do a whole lot. i'm not sure if it should do any</i></b>
<a name=L109 href="source/kernel/chr_drv/vt.c?v=0.97#L109">109</a> <b><i>                 * restoration of modes or what...</i></b>
<a name=L110 href="source/kernel/chr_drv/vt.c?v=0.97#L110">110</a> <b><i>                 */</i></b>
<a name=L111 href="source/kernel/chr_drv/vt.c?v=0.97#L111">111</a>                 switch (arg) {
<a name=L112 href="source/kernel/chr_drv/vt.c?v=0.97#L112">112</a>                 case <a href="ident?v=0.97;i=KD_GRAPHICS">KD_GRAPHICS</a>:
<a name=L113 href="source/kernel/chr_drv/vt.c?v=0.97#L113">113</a>                         break;
<a name=L114 href="source/kernel/chr_drv/vt.c?v=0.97#L114">114</a>                 case <a href="ident?v=0.97;i=KD_TEXT0">KD_TEXT0</a>:
<a name=L115 href="source/kernel/chr_drv/vt.c?v=0.97#L115">115</a>                 case <a href="ident?v=0.97;i=KD_TEXT1">KD_TEXT1</a>:
<a name=L116 href="source/kernel/chr_drv/vt.c?v=0.97#L116">116</a>                         arg = <a href="ident?v=0.97;i=KD_TEXT">KD_TEXT</a>;
<a name=L117 href="source/kernel/chr_drv/vt.c?v=0.97#L117">117</a>                 case <a href="ident?v=0.97;i=KD_TEXT">KD_TEXT</a>:
<a name=L118 href="source/kernel/chr_drv/vt.c?v=0.97#L118">118</a>                         break;
<a name=L119 href="source/kernel/chr_drv/vt.c?v=0.97#L119">119</a>                 default:
<a name=L120 href="source/kernel/chr_drv/vt.c?v=0.97#L120">120</a>                         return -<a href="ident?v=0.97;i=EINVAL">EINVAL</a>;
<a name=L121 href="source/kernel/chr_drv/vt.c?v=0.97#L121">121</a>                 }
<a name=L122 href="source/kernel/chr_drv/vt.c?v=0.97#L122">122</a>                 if (<a href="ident?v=0.97;i=vt_cons">vt_cons</a>[console].<a href="ident?v=0.97;i=vt_mode">vt_mode</a> == (unsigned char) arg)
<a name=L123 href="source/kernel/chr_drv/vt.c?v=0.97#L123">123</a>                         return 0;
<a name=L124 href="source/kernel/chr_drv/vt.c?v=0.97#L124">124</a>                 <a href="ident?v=0.97;i=vt_cons">vt_cons</a>[console].<a href="ident?v=0.97;i=vt_mode">vt_mode</a> = (unsigned char) arg;
<a name=L125 href="source/kernel/chr_drv/vt.c?v=0.97#L125">125</a>                 if (console != <a href="ident?v=0.97;i=fg_console">fg_console</a>)
<a name=L126 href="source/kernel/chr_drv/vt.c?v=0.97#L126">126</a>                         return 0;
<a name=L127 href="source/kernel/chr_drv/vt.c?v=0.97#L127">127</a>                 if (arg == <a href="ident?v=0.97;i=KD_TEXT">KD_TEXT</a>)
<a name=L128 href="source/kernel/chr_drv/vt.c?v=0.97#L128">128</a>                         <a href="ident?v=0.97;i=unblank_screen">unblank_screen</a>();
<a name=L129 href="source/kernel/chr_drv/vt.c?v=0.97#L129">129</a>                 else {
<a name=L130 href="source/kernel/chr_drv/vt.c?v=0.97#L130">130</a>                         <a href="ident?v=0.97;i=timer_active">timer_active</a> &amp;= 1&lt;&lt;<a href="ident?v=0.97;i=BLANK_TIMER">BLANK_TIMER</a>;
<a name=L131 href="source/kernel/chr_drv/vt.c?v=0.97#L131">131</a>                         <a href="ident?v=0.97;i=blank_screen">blank_screen</a>();
<a name=L132 href="source/kernel/chr_drv/vt.c?v=0.97#L132">132</a>                 }
<a name=L133 href="source/kernel/chr_drv/vt.c?v=0.97#L133">133</a>                 return 0;
<a name=L134 href="source/kernel/chr_drv/vt.c?v=0.97#L134">134</a>         case <a href="ident?v=0.97;i=KDGETMODE">KDGETMODE</a>:
<a name=L135 href="source/kernel/chr_drv/vt.c?v=0.97#L135">135</a>                 <a href="ident?v=0.97;i=verify_area">verify_area</a>((void *) arg, sizeof(unsigned long));
<a name=L136 href="source/kernel/chr_drv/vt.c?v=0.97#L136">136</a>                 <a href="ident?v=0.97;i=put_fs_long">put_fs_long</a>(<a href="ident?v=0.97;i=vt_cons">vt_cons</a>[console].<a href="ident?v=0.97;i=vt_mode">vt_mode</a>, (unsigned long *) arg);
<a name=L137 href="source/kernel/chr_drv/vt.c?v=0.97#L137">137</a>                 return 0;
<a name=L138 href="source/kernel/chr_drv/vt.c?v=0.97#L138">138</a> 
<a name=L139 href="source/kernel/chr_drv/vt.c?v=0.97#L139">139</a>         case <a href="ident?v=0.97;i=KDMAPDISP">KDMAPDISP</a>:
<a name=L140 href="source/kernel/chr_drv/vt.c?v=0.97#L140">140</a>         case <a href="ident?v=0.97;i=KDUNMAPDISP">KDUNMAPDISP</a>:
<a name=L141 href="source/kernel/chr_drv/vt.c?v=0.97#L141">141</a>                 <b><i>/*</i></b>
<a name=L142 href="source/kernel/chr_drv/vt.c?v=0.97#L142">142</a> <b><i>                 * these work like a combination of mmap and KDENABIO.</i></b>
<a name=L143 href="source/kernel/chr_drv/vt.c?v=0.97#L143">143</a> <b><i>                 * this could be easily finished.</i></b>
<a name=L144 href="source/kernel/chr_drv/vt.c?v=0.97#L144">144</a> <b><i>                 */</i></b>
<a name=L145 href="source/kernel/chr_drv/vt.c?v=0.97#L145">145</a>                 return -<a href="ident?v=0.97;i=EINVAL">EINVAL</a>;
<a name=L146 href="source/kernel/chr_drv/vt.c?v=0.97#L146">146</a> 
<a name=L147 href="source/kernel/chr_drv/vt.c?v=0.97#L147">147</a>         case <a href="ident?v=0.97;i=KDSKBMODE">KDSKBMODE</a>:
<a name=L148 href="source/kernel/chr_drv/vt.c?v=0.97#L148">148</a>                 if (arg == <a href="ident?v=0.97;i=K_RAW">K_RAW</a>) {
<a name=L149 href="source/kernel/chr_drv/vt.c?v=0.97#L149">149</a>                         if (console == <a href="ident?v=0.97;i=fg_console">fg_console</a>) {
<a name=L150 href="source/kernel/chr_drv/vt.c?v=0.97#L150">150</a>                                 <a href="ident?v=0.97;i=kraw">kraw</a> = 1;
<a name=L151 href="source/kernel/chr_drv/vt.c?v=0.97#L151">151</a>                                 <a href="ident?v=0.97;i=ke0">ke0</a> = 0;
<a name=L152 href="source/kernel/chr_drv/vt.c?v=0.97#L152">152</a>                         } else {
<a name=L153 href="source/kernel/chr_drv/vt.c?v=0.97#L153">153</a>                                 <a href="ident?v=0.97;i=vt_cons">vt_cons</a>[console].vc_kbdraw = 1;
<a name=L154 href="source/kernel/chr_drv/vt.c?v=0.97#L154">154</a>                                 <a href="ident?v=0.97;i=vt_cons">vt_cons</a>[console].vc_kbde0 = 0;
<a name=L155 href="source/kernel/chr_drv/vt.c?v=0.97#L155">155</a>                         }
<a name=L156 href="source/kernel/chr_drv/vt.c?v=0.97#L156">156</a>                 }
<a name=L157 href="source/kernel/chr_drv/vt.c?v=0.97#L157">157</a>                 else if (arg == <a href="ident?v=0.97;i=K_XLATE">K_XLATE</a>) {
<a name=L158 href="source/kernel/chr_drv/vt.c?v=0.97#L158">158</a>                         if (console == <a href="ident?v=0.97;i=fg_console">fg_console</a>)
<a name=L159 href="source/kernel/chr_drv/vt.c?v=0.97#L159">159</a>                                 <a href="ident?v=0.97;i=kraw">kraw</a> = 0;
<a name=L160 href="source/kernel/chr_drv/vt.c?v=0.97#L160">160</a>                         else
<a name=L161 href="source/kernel/chr_drv/vt.c?v=0.97#L161">161</a>                                 <a href="ident?v=0.97;i=vt_cons">vt_cons</a>[console].vc_kbdraw = 0;
<a name=L162 href="source/kernel/chr_drv/vt.c?v=0.97#L162">162</a>                 }
<a name=L163 href="source/kernel/chr_drv/vt.c?v=0.97#L163">163</a>                 else
<a name=L164 href="source/kernel/chr_drv/vt.c?v=0.97#L164">164</a>                         return -<a href="ident?v=0.97;i=EINVAL">EINVAL</a>;
<a name=L165 href="source/kernel/chr_drv/vt.c?v=0.97#L165">165</a>                 <a href="ident?v=0.97;i=flush_input">flush_input</a>(tty);
<a name=L166 href="source/kernel/chr_drv/vt.c?v=0.97#L166">166</a>                 return 0;
<a name=L167 href="source/kernel/chr_drv/vt.c?v=0.97#L167">167</a>         case <a href="ident?v=0.97;i=KDGKBMODE">KDGKBMODE</a>:
<a name=L168 href="source/kernel/chr_drv/vt.c?v=0.97#L168">168</a>                 <a href="ident?v=0.97;i=verify_area">verify_area</a>((void *) arg, sizeof(unsigned long));
<a name=L169 href="source/kernel/chr_drv/vt.c?v=0.97#L169">169</a>                 ucval = (console == <a href="ident?v=0.97;i=fg_console">fg_console</a>) ? <a href="ident?v=0.97;i=kraw">kraw</a> :
<a name=L170 href="source/kernel/chr_drv/vt.c?v=0.97#L170">170</a>                         <a href="ident?v=0.97;i=vt_cons">vt_cons</a>[console].vc_kbdraw;
<a name=L171 href="source/kernel/chr_drv/vt.c?v=0.97#L171">171</a>                 <a href="ident?v=0.97;i=put_fs_long">put_fs_long</a>(ucval ? <a href="ident?v=0.97;i=K_RAW">K_RAW</a> : <a href="ident?v=0.97;i=K_XLATE">K_XLATE</a>, (unsigned long *) arg);
<a name=L172 href="source/kernel/chr_drv/vt.c?v=0.97#L172">172</a>                 return 0;
<a name=L173 href="source/kernel/chr_drv/vt.c?v=0.97#L173">173</a> 
<a name=L174 href="source/kernel/chr_drv/vt.c?v=0.97#L174">174</a>         case <a href="ident?v=0.97;i=KDGETLED">KDGETLED</a>:
<a name=L175 href="source/kernel/chr_drv/vt.c?v=0.97#L175">175</a>                 <a href="ident?v=0.97;i=verify_area">verify_area</a>((void *) arg, sizeof(unsigned char));
<a name=L176 href="source/kernel/chr_drv/vt.c?v=0.97#L176">176</a>                 ucval = (console == <a href="ident?v=0.97;i=fg_console">fg_console</a>) ? <a href="ident?v=0.97;i=kleds">kleds</a> :
<a name=L177 href="source/kernel/chr_drv/vt.c?v=0.97#L177">177</a>                         <a href="ident?v=0.97;i=vt_cons">vt_cons</a>[console].vc_kbdleds;
<a name=L178 href="source/kernel/chr_drv/vt.c?v=0.97#L178">178</a>                 <a href="ident?v=0.97;i=put_fs_byte">put_fs_byte</a>((((ucval &amp; 1) ? <a href="ident?v=0.97;i=LED_SCR">LED_SCR</a> : 0) |
<a name=L179 href="source/kernel/chr_drv/vt.c?v=0.97#L179">179</a>                              ((ucval &amp; 2) ? <a href="ident?v=0.97;i=LED_NUM">LED_NUM</a> : 0) |
<a name=L180 href="source/kernel/chr_drv/vt.c?v=0.97#L180">180</a>                              ((ucval &amp; 4) ? <a href="ident?v=0.97;i=LED_CAP">LED_CAP</a> : 0)),
<a name=L181 href="source/kernel/chr_drv/vt.c?v=0.97#L181">181</a>                             (unsigned char *) arg);
<a name=L182 href="source/kernel/chr_drv/vt.c?v=0.97#L182">182</a>                 return 0;
<a name=L183 href="source/kernel/chr_drv/vt.c?v=0.97#L183">183</a>         case <a href="ident?v=0.97;i=KDSETLED">KDSETLED</a>:
<a name=L184 href="source/kernel/chr_drv/vt.c?v=0.97#L184">184</a>                 if (arg &amp; ~7)
<a name=L185 href="source/kernel/chr_drv/vt.c?v=0.97#L185">185</a>                         return -<a href="ident?v=0.97;i=EINVAL">EINVAL</a>;
<a name=L186 href="source/kernel/chr_drv/vt.c?v=0.97#L186">186</a>                 ucval = (((arg &amp; <a href="ident?v=0.97;i=LED_SCR">LED_SCR</a>) ? 1 : 0) |
<a name=L187 href="source/kernel/chr_drv/vt.c?v=0.97#L187">187</a>                          ((arg &amp; <a href="ident?v=0.97;i=LED_NUM">LED_NUM</a>) ? 2 : 0) |
<a name=L188 href="source/kernel/chr_drv/vt.c?v=0.97#L188">188</a>                          ((arg &amp; <a href="ident?v=0.97;i=LED_CAP">LED_CAP</a>) ? 4 : 0));
<a name=L189 href="source/kernel/chr_drv/vt.c?v=0.97#L189">189</a>                 if (console == <a href="ident?v=0.97;i=fg_console">fg_console</a>) {
<a name=L190 href="source/kernel/chr_drv/vt.c?v=0.97#L190">190</a>                         <a href="ident?v=0.97;i=kleds">kleds</a> = ucval;
<a name=L191 href="source/kernel/chr_drv/vt.c?v=0.97#L191">191</a>                         <a href="ident?v=0.97;i=set_leds">set_leds</a>();
<a name=L192 href="source/kernel/chr_drv/vt.c?v=0.97#L192">192</a>                 }
<a name=L193 href="source/kernel/chr_drv/vt.c?v=0.97#L193">193</a>                 else
<a name=L194 href="source/kernel/chr_drv/vt.c?v=0.97#L194">194</a>                         <a href="ident?v=0.97;i=vt_cons">vt_cons</a>[console].vc_kbdleds = ucval;
<a name=L195 href="source/kernel/chr_drv/vt.c?v=0.97#L195">195</a>                 return 0;
<a name=L196 href="source/kernel/chr_drv/vt.c?v=0.97#L196">196</a> 
<a name=L197 href="source/kernel/chr_drv/vt.c?v=0.97#L197">197</a>         default:
<a name=L198 href="source/kernel/chr_drv/vt.c?v=0.97#L198">198</a>                 return -<a href="ident?v=0.97;i=EINVAL">EINVAL</a>;
<a name=L199 href="source/kernel/chr_drv/vt.c?v=0.97#L199">199</a>         }
<a name=L200 href="source/kernel/chr_drv/vt.c?v=0.97#L200">200</a> }
<a name=L201 href="source/kernel/chr_drv/vt.c?v=0.97#L201">201</a> </pre><hr>
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