📄 keyboard.s
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<!doctype html public "-//W3C//DTD HTML 3.2//EN"><html><head><title>Linux/kernel/chr_drv/keyboard.S</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/keyboard.S">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/keyboard.S">keyboard.S</a></h1><div align=center> <b>版本:</b> [<a href="source/kernel/chr_drv/keyboard.S?v=1.0">1.0</a>] [<a href="source/kernel/chr_drv/keyboard.S?v=0.99.11">0.99.11</a>] [<a href="source/kernel/chr_drv/keyboard.S?v=0.99">0.99</a>] [<a href="source/kernel/chr_drv/keyboard.S?v=0.97">0.97</a>] [<a href="source/kernel/chr_drv/keyboard.S?v=0.96a">0.96a</a>] [<a href="source/kernel/chr_drv/keyboard.S?v=0.95">0.95</a>] [<a href="source/kernel/chr_drv/keyboard.S?v=0.12">0.12</a>] [<b><i>0.11</i></b>] [<a href="source/kernel/chr_drv/keyboard.S?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/keyboard.S#L1">1</a> /* <a name=L2 href="source/kernel/chr_drv/keyboard.S#L2">2</a> * linux/kernel/keyboard.S <a name=L3 href="source/kernel/chr_drv/keyboard.S#L3">3</a> * <a name=L4 href="source/kernel/chr_drv/keyboard.S#L4">4</a> * (C) 1991 Linus Torvalds <a name=L5 href="source/kernel/chr_drv/keyboard.S#L5">5</a> */ <a name=L6 href="source/kernel/chr_drv/keyboard.S#L6">6</a> <a name=L7 href="source/kernel/chr_drv/keyboard.S#L7">7</a> /* <a name=L8 href="source/kernel/chr_drv/keyboard.S#L8">8</a> * Thanks to Alfred Leung for US keyboard patches <a name=L9 href="source/kernel/chr_drv/keyboard.S#L9">9</a> * Wolfgang Thiel for German keyboard patches <a name=L10 href="source/kernel/chr_drv/keyboard.S#L10">10</a> * Marc Corsini for the French keyboard <a name=L11 href="source/kernel/chr_drv/keyboard.S#L11">11</a> */ <a name=L12 href="source/kernel/chr_drv/keyboard.S#L12">12</a> <a name=L13 href="source/kernel/chr_drv/keyboard.S#L13">13</a> #include <linux/config.h> <a name=L14 href="source/kernel/chr_drv/keyboard.S#L14">14</a> <a name=L15 href="source/kernel/chr_drv/keyboard.S#L15">15</a> .text <a name=L16 href="source/kernel/chr_drv/keyboard.S#L16">16</a> .globl _keyboard_interrupt <a name=L17 href="source/kernel/chr_drv/keyboard.S#L17">17</a> <a name=L18 href="source/kernel/chr_drv/keyboard.S#L18">18</a> /* <a name=L19 href="source/kernel/chr_drv/keyboard.S#L19">19</a> * these are for the keyboard read functions <a name=L20 href="source/kernel/chr_drv/keyboard.S#L20">20</a> */ <a name=L21 href="source/kernel/chr_drv/keyboard.S#L21">21</a> size = 1024 /* must be a power of two ! And MUST be the same <a name=L22 href="source/kernel/chr_drv/keyboard.S#L22">22</a> as in tty_io.c !!!! */ <a name=L23 href="source/kernel/chr_drv/keyboard.S#L23">23</a> head = 4 <a name=L24 href="source/kernel/chr_drv/keyboard.S#L24">24</a> tail = 8 <a name=L25 href="source/kernel/chr_drv/keyboard.S#L25">25</a> proc_list = 12 <a name=L26 href="source/kernel/chr_drv/keyboard.S#L26">26</a> buf = 16 <a name=L27 href="source/kernel/chr_drv/keyboard.S#L27">27</a> <a name=L28 href="source/kernel/chr_drv/keyboard.S#L28">28</a> mode: .byte 0 /* caps, alt, ctrl and shift mode */ <a name=L29 href="source/kernel/chr_drv/keyboard.S#L29">29</a> leds: .byte 2 /* num-lock, caps, scroll-lock mode (nom-lock on) */ <a name=L30 href="source/kernel/chr_drv/keyboard.S#L30">30</a> e0: .byte 0 <a name=L31 href="source/kernel/chr_drv/keyboard.S#L31">31</a> <a name=L32 href="source/kernel/chr_drv/keyboard.S#L32">32</a> /* <a name=L33 href="source/kernel/chr_drv/keyboard.S#L33">33</a> * con_int is the real interrupt routine that reads the <a name=L34 href="source/kernel/chr_drv/keyboard.S#L34">34</a> * keyboard scan-code and converts it into the appropriate <a name=L35 href="source/kernel/chr_drv/keyboard.S#L35">35</a> * ascii character(s). <a name=L36 href="source/kernel/chr_drv/keyboard.S#L36">36</a> */ <a name=L37 href="source/kernel/chr_drv/keyboard.S#L37">37</a> _keyboard_interrupt: <a name=L38 href="source/kernel/chr_drv/keyboard.S#L38">38</a> pushl %eax <a name=L39 href="source/kernel/chr_drv/keyboard.S#L39">39</a> pushl %ebx <a name=L40 href="source/kernel/chr_drv/keyboard.S#L40">40</a> pushl %ecx <a name=L41 href="source/kernel/chr_drv/keyboard.S#L41">41</a> pushl %edx <a name=L42 href="source/kernel/chr_drv/keyboard.S#L42">42</a> push %ds <a name=L43 href="source/kernel/chr_drv/keyboard.S#L43">43</a> push %es <a name=L44 href="source/kernel/chr_drv/keyboard.S#L44">44</a> movl $0x10,%eax <a name=L45 href="source/kernel/chr_drv/keyboard.S#L45">45</a> mov %ax,%ds <a name=L46 href="source/kernel/chr_drv/keyboard.S#L46">46</a> mov %ax,%es <a name=L47 href="source/kernel/chr_drv/keyboard.S#L47">47</a> xorl %al,%al /* %eax is scan code */ <a name=L48 href="source/kernel/chr_drv/keyboard.S#L48">48</a> inb $0x60,%al <a name=L49 href="source/kernel/chr_drv/keyboard.S#L49">49</a> cmpb $0xe0,%al <a name=L50 href="source/kernel/chr_drv/keyboard.S#L50">50</a> je set_e0 <a name=L51 href="source/kernel/chr_drv/keyboard.S#L51">51</a> cmpb $0xe1,%al <a name=L52 href="source/kernel/chr_drv/keyboard.S#L52">52</a> je set_e1 <a name=L53 href="source/kernel/chr_drv/keyboard.S#L53">53</a> call key_table(,%eax,4) <a name=L54 href="source/kernel/chr_drv/keyboard.S#L54">54</a> movb $0,e0 <a name=L55 href="source/kernel/chr_drv/keyboard.S#L55">55</a> e0_e1: inb $0x61,%al <a name=L56 href="source/kernel/chr_drv/keyboard.S#L56">56</a> jmp 1f <a name=L57 href="source/kernel/chr_drv/keyboard.S#L57">57</a> 1: jmp 1f <a name=L58 href="source/kernel/chr_drv/keyboard.S#L58">58</a> 1: orb $0x80,%al <a name=L59 href="source/kernel/chr_drv/keyboard.S#L59">59</a> jmp 1f <a name=L60 href="source/kernel/chr_drv/keyboard.S#L60">60</a> 1: jmp 1f <a name=L61 href="source/kernel/chr_drv/keyboard.S#L61">61</a> 1: outb %al,$0x61 <a name=L62 href="source/kernel/chr_drv/keyboard.S#L62">62</a> jmp 1f <a name=L63 href="source/kernel/chr_drv/keyboard.S#L63">63</a> 1: jmp 1f <a name=L64 href="source/kernel/chr_drv/keyboard.S#L64">64</a> 1: andb $0x7F,%al <a name=L65 href="source/kernel/chr_drv/keyboard.S#L65">65</a> outb %al,$0x61 <a name=L66 href="source/kernel/chr_drv/keyboard.S#L66">66</a> movb $0x20,%al <a name=L67 href="source/kernel/chr_drv/keyboard.S#L67">67</a> outb %al,$0x20 <a name=L68 href="source/kernel/chr_drv/keyboard.S#L68">68</a> pushl $0 <a name=L69 href="source/kernel/chr_drv/keyboard.S#L69">69</a> call _do_tty_interrupt <a name=L70 href="source/kernel/chr_drv/keyboard.S#L70">70</a> addl $4,%esp <a name=L71 href="source/kernel/chr_drv/keyboard.S#L71">71</a> pop %es <a name=L72 href="source/kernel/chr_drv/keyboard.S#L72">72</a> pop %ds <a name=L73 href="source/kernel/chr_drv/keyboard.S#L73">73</a> popl %edx <a name=L74 href="source/kernel/chr_drv/keyboard.S#L74">74</a> popl %ecx <a name=L75 href="source/kernel/chr_drv/keyboard.S#L75">75</a> popl %ebx <a name=L76 href="source/kernel/chr_drv/keyboard.S#L76">76</a> popl %eax <a name=L77 href="source/kernel/chr_drv/keyboard.S#L77">77</a> iret <a name=L78 href="source/kernel/chr_drv/keyboard.S#L78">78</a> set_e0: movb $1,e0 <a name=L79 href="source/kernel/chr_drv/keyboard.S#L79">79</a> jmp e0_e1 <a name=L80 href="source/kernel/chr_drv/keyboard.S#L80">80</a> set_e1: movb $2,e0 <a name=L81 href="source/kernel/chr_drv/keyboard.S#L81">81</a> jmp e0_e1 <a name=L82 href="source/kernel/chr_drv/keyboard.S#L82">82</a> <a name=L83 href="source/kernel/chr_drv/keyboard.S#L83">83</a> /* <a name=L84 href="source/kernel/chr_drv/keyboard.S#L84">84</a> * This routine fills the buffer with max 8 bytes, taken from <a name=L85 href="source/kernel/chr_drv/keyboard.S#L85">85</a> * %ebx:%eax. (%edx is high). The bytes are written in the <a name=L86 href="source/kernel/chr_drv/keyboard.S#L86">86</a> * order %al,%ah,%eal,%eah,%bl,%bh ... until %eax is zero. <a name=L87 href="source/kernel/chr_drv/keyboard.S#L87">87</a> */ <a name=L88 href="source/kernel/chr_drv/keyboard.S#L88">88</a> put_queue: <a name=L89 href="source/kernel/chr_drv/keyboard.S#L89">89</a> pushl %ecx <a name=L90 href="source/kernel/chr_drv/keyboard.S#L90">90</a> pushl %edx <a name=L91 href="source/kernel/chr_drv/keyboard.S#L91">91</a> movl _table_list,%edx # read-queue for console <a name=L92 href="source/kernel/chr_drv/keyboard.S#L92">92</a> movl head(%edx),%ecx <a name=L93 href="source/kernel/chr_drv/keyboard.S#L93">93</a> 1: movb %al,buf(%edx,%ecx) <a name=L94 href="source/kernel/chr_drv/keyboard.S#L94">94</a> incl %ecx <a name=L95 href="source/kernel/chr_drv/keyboard.S#L95">95</a> andl $size-1,%ecx <a name=L96 href="source/kernel/chr_drv/keyboard.S#L96">96</a> cmpl tail(%edx),%ecx # buffer full - discard everything <a name=L97 href="source/kernel/chr_drv/keyboard.S#L97">97</a> je 3f <a name=L98 href="source/kernel/chr_drv/keyboard.S#L98">98</a> shrdl $8,%ebx,%eax <a name=L99 href="source/kernel/chr_drv/keyboard.S#L99">99</a> je 2f<a name=L100 href="source/kernel/chr_drv/keyboard.S#L100">100</a> shrl $8,%ebx<a name=L101 href="source/kernel/chr_drv/keyboard.S#L101">101</a> jmp 1b<a name=L102 href="source/kernel/chr_drv/keyboard.S#L102">102</a> 2: movl %ecx,head(%edx)<a name=L103 href="source/kernel/chr_drv/keyboard.S#L103">103</a> movl proc_list(%edx),%ecx<a name=L104 href="source/kernel/chr_drv/keyboard.S#L104">104</a> testl %ecx,%ecx<a name=L105 href="source/kernel/chr_drv/keyboard.S#L105">105</a> je 3f<a name=L106 href="source/kernel/chr_drv/keyboard.S#L106">106</a> movl $0,(%ecx)<a name=L107 href="source/kernel/chr_drv/keyboard.S#L107">107</a> 3: popl %edx<a name=L108 href="source/kernel/chr_drv/keyboard.S#L108">108</a> popl %ecx<a name=L109 href="source/kernel/chr_drv/keyboard.S#L109">109</a> ret<a name=L110 href="source/kernel/chr_drv/keyboard.S#L110">110</a> <a name=L111 href="source/kernel/chr_drv/keyboard.S#L111">111</a> ctrl: movb $0x04,%al<a name=L112 href="source/kernel/chr_drv/keyboard.S#L112">112</a> jmp 1f<a name=L113 href="source/kernel/chr_drv/keyboard.S#L113">113</a> alt: movb $0x10,%al<a name=L114 href="source/kernel/chr_drv/keyboard.S#L114">114</a> 1: cmpb $0,e0<a name=L115 href="source/kernel/chr_drv/keyboard.S#L115">115</a> je 2f<a name=L116 href="source/kernel/chr_drv/keyboard.S#L116">116</a> addb %al,%al<a name=L117 href="source/kernel/chr_drv/keyboard.S#L117">117</a> 2: orb %al,mode<a name=L118 href="source/kernel/chr_drv/keyboard.S#L118">118</a> ret<a name=L119 href="source/kernel/chr_drv/keyboard.S#L119">119</a> unctrl: movb $0x04,%al<a name=L120 href="source/kernel/chr_drv/keyboard.S#L120">120</a> jmp 1f<a name=L121 href="source/kernel/chr_drv/keyboard.S#L121">121</a> unalt: movb $0x10,%al<a name=L122 href="source/kernel/chr_drv/keyboard.S#L122">122</a> 1: cmpb $0,e0<a name=L123 href="source/kernel/chr_drv/keyboard.S#L123">123</a> je 2f<a name=L124 href="source/kernel/chr_drv/keyboard.S#L124">124</a> addb %al,%al<a name=L125 href="source/kernel/chr_drv/keyboard.S#L125">125</a> 2: notb %al<a name=L126 href="source/kernel/chr_drv/keyboard.S#L126">126</a> andb %al,mode<a name=L127 href="source/kernel/chr_drv/keyboard.S#L127">127</a> ret⌨️ 快捷键说明
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