📄 console.c
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<!doctype html public "-//W3C//DTD HTML 3.2//EN"><html><head><title>Linux/kernel/chr_drv/console.c</title><meta http-equiv=Content-Type content="text/html; charset=gb2312"><base href="http://oldlinux.org/lxr/http/"></head><body bgcolor=white><div align=center> [<b><i>源代码浏览</i></b>] [<a href="diff/kernel/chr_drv/console.c">区别标定</a>] [<a href="ident">标识符搜索</a>] [<a href="search">文本搜索</a>] [<a href="find">文件搜索</a>]</div><h1 align=center> <a href="http:/"> OldLinux</a> <a href="http:blurb.html"> 交叉引用</a><br> <a href="source/">Linux</a>/<a href="source/kernel/">kernel</a>/<a href="source/kernel/chr_drv/">chr_drv</a>/<a href="source/kernel/chr_drv/console.c">console.c</a></h1><div align=center> <b>版本:</b> [<a href="source/kernel/chr_drv/console.c?v=1.0">1.0</a>] [<a href="source/kernel/chr_drv/console.c?v=0.99.11">0.99.11</a>] [<a href="source/kernel/chr_drv/console.c?v=0.99">0.99</a>] [<a href="source/kernel/chr_drv/console.c?v=0.97">0.97</a>] [<a href="source/kernel/chr_drv/console.c?v=0.96a">0.96a</a>] [<a href="source/kernel/chr_drv/console.c?v=0.95">0.95</a>] [<a href="source/kernel/chr_drv/console.c?v=0.12">0.12</a>] [<b><i>0.11</i></b>] [<a href="source/kernel/chr_drv/console.c?v=0.01">0.01</a>] <br> <b>体系结构:</b> [<b><i>i386</i></b>] <br></div><hr><pre> <a name=L1 href="source/kernel/chr_drv/console.c#L1">1</a> <b><i>/*</i></b> <a name=L2 href="source/kernel/chr_drv/console.c#L2">2</a> <b><i> * linux/kernel/console.c</i></b> <a name=L3 href="source/kernel/chr_drv/console.c#L3">3</a> <b><i> *</i></b> <a name=L4 href="source/kernel/chr_drv/console.c#L4">4</a> <b><i> * (C) 1991 Linus Torvalds</i></b> <a name=L5 href="source/kernel/chr_drv/console.c#L5">5</a> <b><i> */</i></b> <a name=L6 href="source/kernel/chr_drv/console.c#L6">6</a> <a name=L7 href="source/kernel/chr_drv/console.c#L7">7</a> <b><i>/*</i></b> <a name=L8 href="source/kernel/chr_drv/console.c#L8">8</a> <b><i> * console.c</i></b> <a name=L9 href="source/kernel/chr_drv/console.c#L9">9</a> <b><i> *</i></b> <a name=L10 href="source/kernel/chr_drv/console.c#L10">10</a> <b><i> * This module implements the console io functions</i></b> <a name=L11 href="source/kernel/chr_drv/console.c#L11">11</a> <b><i> * 'void con_init(void)'</i></b> <a name=L12 href="source/kernel/chr_drv/console.c#L12">12</a> <b><i> * 'void con_write(struct tty_queue * queue)'</i></b> <a name=L13 href="source/kernel/chr_drv/console.c#L13">13</a> <b><i> * Hopefully this will be a rather complete VT102 implementation.</i></b> <a name=L14 href="source/kernel/chr_drv/console.c#L14">14</a> <b><i> *</i></b> <a name=L15 href="source/kernel/chr_drv/console.c#L15">15</a> <b><i> * Beeping thanks to John T Kohl.</i></b> <a name=L16 href="source/kernel/chr_drv/console.c#L16">16</a> <b><i> */</i></b> <a name=L17 href="source/kernel/chr_drv/console.c#L17">17</a> <a name=L18 href="source/kernel/chr_drv/console.c#L18">18</a> <b><i>/*</i></b> <a name=L19 href="source/kernel/chr_drv/console.c#L19">19</a> <b><i> * NOTE!!! We sometimes disable and enable interrupts for a short while</i></b> <a name=L20 href="source/kernel/chr_drv/console.c#L20">20</a> <b><i> * (to put a word in video IO), but this will work even for keyboard</i></b> <a name=L21 href="source/kernel/chr_drv/console.c#L21">21</a> <b><i> * interrupts. We know interrupts aren't enabled when getting a keyboard</i></b> <a name=L22 href="source/kernel/chr_drv/console.c#L22">22</a> <b><i> * interrupt, as we use trap-gates. Hopefully all is well.</i></b> <a name=L23 href="source/kernel/chr_drv/console.c#L23">23</a> <b><i> */</i></b> <a name=L24 href="source/kernel/chr_drv/console.c#L24">24</a> <a name=L25 href="source/kernel/chr_drv/console.c#L25">25</a> <b><i>/*</i></b> <a name=L26 href="source/kernel/chr_drv/console.c#L26">26</a> <b><i> * Code to check for different video-cards mostly by Galen Hunt,</i></b> <a name=L27 href="source/kernel/chr_drv/console.c#L27">27</a> <b><i> * <g-hunt@ee.utah.edu></i></b> <a name=L28 href="source/kernel/chr_drv/console.c#L28">28</a> <b><i> */</i></b> <a name=L29 href="source/kernel/chr_drv/console.c#L29">29</a> <a name=L30 href="source/kernel/chr_drv/console.c#L30">30</a> #include <linux/sched.h> <a name=L31 href="source/kernel/chr_drv/console.c#L31">31</a> #include <linux/tty.h> <a name=L32 href="source/kernel/chr_drv/console.c#L32">32</a> #include <asm/io.h> <a name=L33 href="source/kernel/chr_drv/console.c#L33">33</a> #include <asm/system.h> <a name=L34 href="source/kernel/chr_drv/console.c#L34">34</a> <a name=L35 href="source/kernel/chr_drv/console.c#L35">35</a> <b><i>/*</i></b> <a name=L36 href="source/kernel/chr_drv/console.c#L36">36</a> <b><i> * These are set up by the setup-routine at boot-time:</i></b> <a name=L37 href="source/kernel/chr_drv/console.c#L37">37</a> <b><i> */</i></b> <a name=L38 href="source/kernel/chr_drv/console.c#L38">38</a> <a name=L39 href="source/kernel/chr_drv/console.c#L39">39</a> #define <a href="ident?i=ORIG_X">ORIG_X</a> (*(unsigned char *)0x90000) <a name=L40 href="source/kernel/chr_drv/console.c#L40">40</a> #define <a href="ident?i=ORIG_Y">ORIG_Y</a> (*(unsigned char *)0x90001) <a name=L41 href="source/kernel/chr_drv/console.c#L41">41</a> #define <a href="ident?i=ORIG_VIDEO_PAGE">ORIG_VIDEO_PAGE</a> (*(unsigned short *)0x90004) <a name=L42 href="source/kernel/chr_drv/console.c#L42">42</a> #define <a href="ident?i=ORIG_VIDEO_MODE">ORIG_VIDEO_MODE</a> ((*(unsigned short *)0x90006) & 0xff) <a name=L43 href="source/kernel/chr_drv/console.c#L43">43</a> #define <a href="ident?i=ORIG_VIDEO_COLS">ORIG_VIDEO_COLS</a> (((*(unsigned short *)0x90006) & 0xff00) >> 8) <a name=L44 href="source/kernel/chr_drv/console.c#L44">44</a> #define <a href="ident?i=ORIG_VIDEO_LINES">ORIG_VIDEO_LINES</a> (25) <a name=L45 href="source/kernel/chr_drv/console.c#L45">45</a> #define <a href="ident?i=ORIG_VIDEO_EGA_AX">ORIG_VIDEO_EGA_AX</a> (*(unsigned short *)0x90008) <a name=L46 href="source/kernel/chr_drv/console.c#L46">46</a> #define <a href="ident?i=ORIG_VIDEO_EGA_BX">ORIG_VIDEO_EGA_BX</a> (*(unsigned short *)0x9000a) <a name=L47 href="source/kernel/chr_drv/console.c#L47">47</a> #define <a href="ident?i=ORIG_VIDEO_EGA_CX">ORIG_VIDEO_EGA_CX</a> (*(unsigned short *)0x9000c) <a name=L48 href="source/kernel/chr_drv/console.c#L48">48</a> <a name=L49 href="source/kernel/chr_drv/console.c#L49">49</a> #define <a href="ident?i=VIDEO_TYPE_MDA">VIDEO_TYPE_MDA</a> 0x10 <b><i>/* Monochrome Text Display */</i></b> <a name=L50 href="source/kernel/chr_drv/console.c#L50">50</a> #define <a href="ident?i=VIDEO_TYPE_CGA">VIDEO_TYPE_CGA</a> 0x11 <b><i>/* CGA Display */</i></b> <a name=L51 href="source/kernel/chr_drv/console.c#L51">51</a> #define <a href="ident?i=VIDEO_TYPE_EGAM">VIDEO_TYPE_EGAM</a> 0x20 <b><i>/* EGA/VGA in Monochrome Mode */</i></b> <a name=L52 href="source/kernel/chr_drv/console.c#L52">52</a> #define <a href="ident?i=VIDEO_TYPE_EGAC">VIDEO_TYPE_EGAC</a> 0x21 <b><i>/* EGA/VGA in Color Mode */</i></b> <a name=L53 href="source/kernel/chr_drv/console.c#L53">53</a> <a name=L54 href="source/kernel/chr_drv/console.c#L54">54</a> #define <a href="ident?i=NPAR">NPAR</a> 16 <a name=L55 href="source/kernel/chr_drv/console.c#L55">55</a> <a name=L56 href="source/kernel/chr_drv/console.c#L56">56</a> extern void <a href="ident?i=keyboard_interrupt">keyboard_interrupt</a>(void); <a name=L57 href="source/kernel/chr_drv/console.c#L57">57</a> <a name=L58 href="source/kernel/chr_drv/console.c#L58">58</a> static unsigned char <a href="ident?i=video_type">video_type</a>; <b><i>/* Type of display being used */</i></b> <a name=L59 href="source/kernel/chr_drv/console.c#L59">59</a> static unsigned long <a href="ident?i=video_num_columns">video_num_columns</a>; <b><i>/* Number of text columns */</i></b> <a name=L60 href="source/kernel/chr_drv/console.c#L60">60</a> static unsigned long <a href="ident?i=video_size_row">video_size_row</a>; <b><i>/* Bytes per row */</i></b> <a name=L61 href="source/kernel/chr_drv/console.c#L61">61</a> static unsigned long <a href="ident?i=video_num_lines">video_num_lines</a>; <b><i>/* Number of test lines */</i></b> <a name=L62 href="source/kernel/chr_drv/console.c#L62">62</a> static unsigned char <a href="ident?i=video_page">video_page</a>; <b><i>/* Initial video page */</i></b> <a name=L63 href="source/kernel/chr_drv/console.c#L63">63</a> static unsigned long <a href="ident?i=video_mem_start">video_mem_start</a>; <b><i>/* Start of video RAM */</i></b> <a name=L64 href="source/kernel/chr_drv/console.c#L64">64</a> static unsigned long <a href="ident?i=video_mem_end">video_mem_end</a>; <b><i>/* End of video RAM (sort of) */</i></b> <a name=L65 href="source/kernel/chr_drv/console.c#L65">65</a> static unsigned short <a href="ident?i=video_port_reg">video_port_reg</a>; <b><i>/* Video register select port */</i></b> <a name=L66 href="source/kernel/chr_drv/console.c#L66">66</a> static unsigned short <a href="ident?i=video_port_val">video_port_val</a>; <b><i>/* Video register value port */</i></b> <a name=L67 href="source/kernel/chr_drv/console.c#L67">67</a> static unsigned short <a href="ident?i=video_erase_char">video_erase_char</a>; <b><i>/* Char+Attrib to erase with */</i></b> <a name=L68 href="source/kernel/chr_drv/console.c#L68">68</a> <a name=L69 href="source/kernel/chr_drv/console.c#L69">69</a> static unsigned long <a href="ident?i=origin">origin</a>; <b><i>/* Used for EGA/VGA fast scroll */</i></b> <a name=L70 href="source/kernel/chr_drv/console.c#L70">70</a> static unsigned long <a href="ident?i=scr_end">scr_end</a>; <b><i>/* Used for EGA/VGA fast scroll */</i></b> <a name=L71 href="source/kernel/chr_drv/console.c#L71">71</a> static unsigned long <a href="ident?i=pos">pos</a>; <a name=L72 href="source/kernel/chr_drv/console.c#L72">72</a> static unsigned long <a href="ident?i=x">x</a>,<a href="ident?i=y">y</a>; <a name=L73 href="source/kernel/chr_drv/console.c#L73">73</a> static unsigned long <a href="ident?i=top">top</a>,<a href="ident?i=bottom">bottom</a>; <a name=L74 href="source/kernel/chr_drv/console.c#L74">74</a> static unsigned long <a href="ident?i=state">state</a>=0; <a name=L75 href="source/kernel/chr_drv/console.c#L75">75</a> static unsigned long <a href="ident?i=npar">npar</a>,<a href="ident?i=par">par</a>[<a href="ident?i=NPAR">NPAR</a>]; <a name=L76 href="source/kernel/chr_drv/console.c#L76">76</a> static unsigned long <a href="ident?i=ques">ques</a>=0; <a name=L77 href="source/kernel/chr_drv/console.c#L77">77</a> static unsigned char <a href="ident?i=attr">attr</a>=0x07; <a name=L78 href="source/kernel/chr_drv/console.c#L78">78</a> <a name=L79 href="source/kernel/chr_drv/console.c#L79">79</a> static void <a href="ident?i=sysbeep">sysbeep</a>(void); <a name=L80 href="source/kernel/chr_drv/console.c#L80">80</a> ⌨️ 快捷键说明
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