console.c

linux0.11 version(301k)

 <a name=L81 href="source/kernel/chr_drv/console.c#L81">81</a> <b><i>/*</i></b>
 <a name=L82 href="source/kernel/chr_drv/console.c#L82">82</a> <b><i> * this is what the terminal answers to a ESC-Z or csi0c</i></b>
 <a name=L83 href="source/kernel/chr_drv/console.c#L83">83</a> <b><i> * query (= vt100 response).</i></b>
 <a name=L84 href="source/kernel/chr_drv/console.c#L84">84</a> <b><i> */</i></b>
 <a name=L85 href="source/kernel/chr_drv/console.c#L85">85</a> #define <a href="ident?i=RESPONSE">RESPONSE</a> <i>"\033[?1;2c"</i>
 <a name=L86 href="source/kernel/chr_drv/console.c#L86">86</a> 
 <a name=L87 href="source/kernel/chr_drv/console.c#L87">87</a> <b><i>/* NOTE! gotoxy thinks x==video_num_columns is ok */</i></b>
 <a name=L88 href="source/kernel/chr_drv/console.c#L88">88</a> static inline void <a href="ident?i=gotoxy">gotoxy</a>(unsigned int new_x,unsigned int new_y)
 <a name=L89 href="source/kernel/chr_drv/console.c#L89">89</a> {
 <a name=L90 href="source/kernel/chr_drv/console.c#L90">90</a>         if (new_x &gt; <a href="ident?i=video_num_columns">video_num_columns</a> || new_y &gt;= <a href="ident?i=video_num_lines">video_num_lines</a>)
 <a name=L91 href="source/kernel/chr_drv/console.c#L91">91</a>                 return;
 <a name=L92 href="source/kernel/chr_drv/console.c#L92">92</a>         <a href="ident?i=x">x</a>=new_x;
 <a name=L93 href="source/kernel/chr_drv/console.c#L93">93</a>         <a href="ident?i=y">y</a>=new_y;
 <a name=L94 href="source/kernel/chr_drv/console.c#L94">94</a>         <a href="ident?i=pos">pos</a>=<a href="ident?i=origin">origin</a> + <a href="ident?i=y">y</a>*<a href="ident?i=video_size_row">video_size_row</a> + (<a href="ident?i=x">x</a>&lt;&lt;1);
 <a name=L95 href="source/kernel/chr_drv/console.c#L95">95</a> }
 <a name=L96 href="source/kernel/chr_drv/console.c#L96">96</a> 
 <a name=L97 href="source/kernel/chr_drv/console.c#L97">97</a> static inline void <a href="ident?i=set_origin">set_origin</a>(void)
 <a name=L98 href="source/kernel/chr_drv/console.c#L98">98</a> {
 <a name=L99 href="source/kernel/chr_drv/console.c#L99">99</a>         <a href="ident?i=cli">cli</a>();
<a name=L100 href="source/kernel/chr_drv/console.c#L100">100</a>         <a href="ident?i=outb_p">outb_p</a>(12, <a href="ident?i=video_port_reg">video_port_reg</a>);
<a name=L101 href="source/kernel/chr_drv/console.c#L101">101</a>         <a href="ident?i=outb_p">outb_p</a>(0xff&amp;((<a href="ident?i=origin">origin</a>-<a href="ident?i=video_mem_start">video_mem_start</a>)&gt;&gt;9), <a href="ident?i=video_port_val">video_port_val</a>);
<a name=L102 href="source/kernel/chr_drv/console.c#L102">102</a>         <a href="ident?i=outb_p">outb_p</a>(13, <a href="ident?i=video_port_reg">video_port_reg</a>);
<a name=L103 href="source/kernel/chr_drv/console.c#L103">103</a>         <a href="ident?i=outb_p">outb_p</a>(0xff&amp;((<a href="ident?i=origin">origin</a>-<a href="ident?i=video_mem_start">video_mem_start</a>)&gt;&gt;1), <a href="ident?i=video_port_val">video_port_val</a>);
<a name=L104 href="source/kernel/chr_drv/console.c#L104">104</a>         <a href="ident?i=sti">sti</a>();
<a name=L105 href="source/kernel/chr_drv/console.c#L105">105</a> }
<a name=L106 href="source/kernel/chr_drv/console.c#L106">106</a> 
<a name=L107 href="source/kernel/chr_drv/console.c#L107">107</a> static void <a href="ident?i=scrup">scrup</a>(void)
<a name=L108 href="source/kernel/chr_drv/console.c#L108">108</a> {
<a name=L109 href="source/kernel/chr_drv/console.c#L109">109</a>         if (<a href="ident?i=video_type">video_type</a> == <a href="ident?i=VIDEO_TYPE_EGAC">VIDEO_TYPE_EGAC</a> || <a href="ident?i=video_type">video_type</a> == <a href="ident?i=VIDEO_TYPE_EGAM">VIDEO_TYPE_EGAM</a>)
<a name=L110 href="source/kernel/chr_drv/console.c#L110">110</a>         {
<a name=L111 href="source/kernel/chr_drv/console.c#L111">111</a>                 if (!<a href="ident?i=top">top</a> &amp;&amp; <a href="ident?i=bottom">bottom</a> == <a href="ident?i=video_num_lines">video_num_lines</a>) {
<a name=L112 href="source/kernel/chr_drv/console.c#L112">112</a>                         <a href="ident?i=origin">origin</a> += <a href="ident?i=video_size_row">video_size_row</a>;
<a name=L113 href="source/kernel/chr_drv/console.c#L113">113</a>                         <a href="ident?i=pos">pos</a> += <a href="ident?i=video_size_row">video_size_row</a>;
<a name=L114 href="source/kernel/chr_drv/console.c#L114">114</a>                         <a href="ident?i=scr_end">scr_end</a> += <a href="ident?i=video_size_row">video_size_row</a>;
<a name=L115 href="source/kernel/chr_drv/console.c#L115">115</a>                         if (<a href="ident?i=scr_end">scr_end</a> &gt; <a href="ident?i=video_mem_end">video_mem_end</a>) {
<a name=L116 href="source/kernel/chr_drv/console.c#L116">116</a>                                 __asm__(<i>"cld\n\t"</i>
<a name=L117 href="source/kernel/chr_drv/console.c#L117">117</a>                                         <i>"rep\n\t"</i>
<a name=L118 href="source/kernel/chr_drv/console.c#L118">118</a>                                         <i>"movsl\n\t"</i>
<a name=L119 href="source/kernel/chr_drv/console.c#L119">119</a>                                         <i>"movl _video_num_columns,%1\n\t"</i>
<a name=L120 href="source/kernel/chr_drv/console.c#L120">120</a>                                         <i>"rep\n\t"</i>
<a name=L121 href="source/kernel/chr_drv/console.c#L121">121</a>                                         <i>"stosw"</i>
<a name=L122 href="source/kernel/chr_drv/console.c#L122">122</a>                                         ::<i>"a"</i> (<a href="ident?i=video_erase_char">video_erase_char</a>),
<a name=L123 href="source/kernel/chr_drv/console.c#L123">123</a>                                         <i>"c"</i> ((<a href="ident?i=video_num_lines">video_num_lines</a>-1)*<a href="ident?i=video_num_columns">video_num_columns</a>&gt;&gt;1),
<a name=L124 href="source/kernel/chr_drv/console.c#L124">124</a>                                         <i>"D"</i> (<a href="ident?i=video_mem_start">video_mem_start</a>),
<a name=L125 href="source/kernel/chr_drv/console.c#L125">125</a>                                         <i>"S"</i> (<a href="ident?i=origin">origin</a>)
<a name=L126 href="source/kernel/chr_drv/console.c#L126">126</a>                                         :<i>"cx"</i>,<i>"di"</i>,<i>"si"</i>);
<a name=L127 href="source/kernel/chr_drv/console.c#L127">127</a>                                 <a href="ident?i=scr_end">scr_end</a> -= <a href="ident?i=origin">origin</a>-<a href="ident?i=video_mem_start">video_mem_start</a>;
<a name=L128 href="source/kernel/chr_drv/console.c#L128">128</a>                                 <a href="ident?i=pos">pos</a> -= <a href="ident?i=origin">origin</a>-<a href="ident?i=video_mem_start">video_mem_start</a>;
<a name=L129 href="source/kernel/chr_drv/console.c#L129">129</a>                                 <a href="ident?i=origin">origin</a> = <a href="ident?i=video_mem_start">video_mem_start</a>;
<a name=L130 href="source/kernel/chr_drv/console.c#L130">130</a>                         } else {
<a name=L131 href="source/kernel/chr_drv/console.c#L131">131</a>                                 __asm__(<i>"cld\n\t"</i>
<a name=L132 href="source/kernel/chr_drv/console.c#L132">132</a>                                         <i>"rep\n\t"</i>
<a name=L133 href="source/kernel/chr_drv/console.c#L133">133</a>                                         <i>"stosw"</i>
<a name=L134 href="source/kernel/chr_drv/console.c#L134">134</a>                                         ::<i>"a"</i> (<a href="ident?i=video_erase_char">video_erase_char</a>),
<a name=L135 href="source/kernel/chr_drv/console.c#L135">135</a>                                         <i>"c"</i> (<a href="ident?i=video_num_columns">video_num_columns</a>),
<a name=L136 href="source/kernel/chr_drv/console.c#L136">136</a>                                         <i>"D"</i> (<a href="ident?i=scr_end">scr_end</a>-<a href="ident?i=video_size_row">video_size_row</a>)
<a name=L137 href="source/kernel/chr_drv/console.c#L137">137</a>                                         :<i>"cx"</i>,<i>"di"</i>);
<a name=L138 href="source/kernel/chr_drv/console.c#L138">138</a>                         }
<a name=L139 href="source/kernel/chr_drv/console.c#L139">139</a>                         <a href="ident?i=set_origin">set_origin</a>();
<a name=L140 href="source/kernel/chr_drv/console.c#L140">140</a>                 } else {
<a name=L141 href="source/kernel/chr_drv/console.c#L141">141</a>                         __asm__(<i>"cld\n\t"</i>
<a name=L142 href="source/kernel/chr_drv/console.c#L142">142</a>                                 <i>"rep\n\t"</i>
<a name=L143 href="source/kernel/chr_drv/console.c#L143">143</a>                                 <i>"movsl\n\t"</i>
<a name=L144 href="source/kernel/chr_drv/console.c#L144">144</a>                                 <i>"movl _video_num_columns,%%ecx\n\t"</i>
<a name=L145 href="source/kernel/chr_drv/console.c#L145">145</a>                                 <i>"rep\n\t"</i>
<a name=L146 href="source/kernel/chr_drv/console.c#L146">146</a>                                 <i>"stosw"</i>
<a name=L147 href="source/kernel/chr_drv/console.c#L147">147</a>                                 ::<i>"a"</i> (<a href="ident?i=video_erase_char">video_erase_char</a>),
<a name=L148 href="source/kernel/chr_drv/console.c#L148">148</a>                                 <i>"c"</i> ((<a href="ident?i=bottom">bottom</a>-<a href="ident?i=top">top</a>-1)*<a href="ident?i=video_num_columns">video_num_columns</a>&gt;&gt;1),
<a name=L149 href="source/kernel/chr_drv/console.c#L149">149</a>                                 <i>"D"</i> (<a href="ident?i=origin">origin</a>+<a href="ident?i=video_size_row">video_size_row</a>*<a href="ident?i=top">top</a>),
<a name=L150 href="source/kernel/chr_drv/console.c#L150">150</a>                                 <i>"S"</i> (<a href="ident?i=origin">origin</a>+<a href="ident?i=video_size_row">video_size_row</a>*(<a href="ident?i=top">top</a>+1))
<a name=L151 href="source/kernel/chr_drv/console.c#L151">151</a>                                 :<i>"cx"</i>,<i>"di"</i>,<i>"si"</i>);
<a name=L152 href="source/kernel/chr_drv/console.c#L152">152</a>                 }
<a name=L153 href="source/kernel/chr_drv/console.c#L153">153</a>         }
<a name=L154 href="source/kernel/chr_drv/console.c#L154">154</a>         else            <b><i>/* Not EGA/VGA */</i></b>
<a name=L155 href="source/kernel/chr_drv/console.c#L155">155</a>         {
<a name=L156 href="source/kernel/chr_drv/console.c#L156">156</a>                 __asm__(<i>"cld\n\t"</i>
<a name=L157 href="source/kernel/chr_drv/console.c#L157">157</a>                         <i>"rep\n\t"</i>
<a name=L158 href="source/kernel/chr_drv/console.c#L158">158</a>                         <i>"movsl\n\t"</i>
<a name=L159 href="source/kernel/chr_drv/console.c#L159">159</a>                         <i>"movl _video_num_columns,%%ecx\n\t"</i>
<a name=L160 href="source/kernel/chr_drv/console.c#L160">160</a>                         <i>"rep\n\t"</i>
<a name=L161 href="source/kernel/chr_drv/console.c#L161">161</a>                         <i>"stosw"</i>
<a name=L162 href="source/kernel/chr_drv/console.c#L162">162</a>                         ::<i>"a"</i> (<a href="ident?i=video_erase_char">video_erase_char</a>),
<a name=L163 href="source/kernel/chr_drv/console.c#L163">163</a>                         <i>"c"</i> ((<a href="ident?i=bottom">bottom</a>-<a href="ident?i=top">top</a>-1)*<a href="ident?i=video_num_columns">video_num_columns</a>&gt;&gt;1),
<a name=L164 href="source/kernel/chr_drv/console.c#L164">164</a>                         <i>"D"</i> (<a href="ident?i=origin">origin</a>+<a href="ident?i=video_size_row">video_size_row</a>*<a href="ident?i=top">top</a>),
<a name=L165 href="source/kernel/chr_drv/console.c#L165">165</a>                         <i>"S"</i> (<a href="ident?i=origin">origin</a>+<a href="ident?i=video_size_row">video_size_row</a>*(<a href="ident?i=top">top</a>+1))
<a name=L166 href="source/kernel/chr_drv/console.c#L166">166</a>                         :<i>"cx"</i>,<i>"di"</i>,<i>"si"</i>);
<a name=L167 href="source/kernel/chr_drv/console.c#L167">167</a>         }
<a name=L168 href="source/kernel/chr_drv/console.c#L168">168</a> }
<a name=L169 href="source/kernel/chr_drv/console.c#L169">169</a> 
<a name=L170 href="source/kernel/chr_drv/console.c#L170">170</a> static void <a href="ident?i=scrdown">scrdown</a>(void)
<a name=L171 href="source/kernel/chr_drv/console.c#L171">171</a> {
<a name=L172 href="source/kernel/chr_drv/console.c#L172">172</a>         if (<a href="ident?i=video_type">video_type</a> == <a href="ident?i=VIDEO_TYPE_EGAC">VIDEO_TYPE_EGAC</a> || <a href="ident?i=video_type">video_type</a> == <a href="ident?i=VIDEO_TYPE_EGAM">VIDEO_TYPE_EGAM</a>)
<a name=L173 href="source/kernel/chr_drv/console.c#L173">173</a>         {
<a name=L174 href="source/kernel/chr_drv/console.c#L174">174</a>                 __asm__(<i>"std\n\t"</i>
<a name=L175 href="source/kernel/chr_drv/console.c#L175">175</a>                         <i>"rep\n\t"</i>
<a name=L176 href="source/kernel/chr_drv/console.c#L176">176</a>                         <i>"movsl\n\t"</i>
<a name=L177 href="source/kernel/chr_drv/console.c#L177">177</a>                         <i>"addl $2,%%edi\n\t"</i>     <b><i>/* %edi has been decremented by 4 */</i></b>
<a name=L178 href="source/kernel/chr_drv/console.c#L178">178</a>                         <i>"movl _video_num_columns,%%ecx\n\t"</i>
<a name=L179 href="source/kernel/chr_drv/console.c#L179">179</a>                         <i>"rep\n\t"</i>
<a name=L180 href="source/kernel/chr_drv/console.c#L180">180</a>                         <i>"stosw"</i>
<a name=L181 href="source/kernel/chr_drv/console.c#L181">181</a>                         ::<i>"a"</i> (<a href="ident?i=video_erase_char">video_erase_char</a>),
<a name=L182 href="source/kernel/chr_drv/console.c#L182">182</a>                         <i>"c"</i> ((<a href="ident?i=bottom">bottom</a>-<a href="ident?i=top">top</a>-1)*<a href="ident?i=video_num_columns">video_num_columns</a>&gt;&gt;1),
<a name=L183 href="source/kernel/chr_drv/console.c#L183">183</a>                         <i>"D"</i> (<a href="ident?i=origin">origin</a>+<a href="ident?i=video_size_row">video_size_row</a>*<a href="ident?i=bottom">bottom</a>-4),
<a name=L184 href="source/kernel/chr_drv/console.c#L184">184</a>                         <i>"S"</i> (<a href="ident?i=origin">origin</a>+<a href="ident?i=video_size_row">video_size_row</a>*(<a href="ident?i=bottom">bottom</a>-1)-4)
<a name=L185 href="source/kernel/chr_drv/console.c#L185">185</a>                         :<i>"ax"</i>,<i>"cx"</i>,<i>"di"</i>,<i>"si"</i>);
<a name=L186 href="source/kernel/chr_drv/console.c#L186">186</a>         }
<a name=L187 href="source/kernel/chr_drv/console.c#L187">187</a>         else            <b><i>/* Not EGA/VGA */</i></b>
<a name=L188 href="source/kernel/chr_drv/console.c#L188">188</a>         {
<a name=L189 href="source/kernel/chr_drv/console.c#L189">189</a>                 __asm__(<i>"std\n\t"</i>
<a name=L190 href="source/kernel/chr_drv/console.c#L190">190</a>                         <i>"rep\n\t"</i>
<a name=L191 href="source/kernel/chr_drv/console.c#L191">191</a>                         <i>"movsl\n\t"</i>