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<a class="el" href="dir_897b6a2d7bab147dd1db58381aad3984.html">src</a> » <a class="el" href="dir_832905b1f7f5feaf61a306b40c0ac817.html">sys</a> » <a class="el" href="dir_7efffd2b1fae7bb6f2aa85845c863494.html">kernel</a></div>
<h1>ap-boot.S</h1><a href="ap-boot_8S.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Okay, this file contains the code that's going to bootstrap the AP cpus</span>
<a name="l00003"></a>00003 <span class="comment"> */</span>
<a name="l00004"></a>00004
<a name="l00005"></a>00005
<a name="l00006"></a><a class="code" href="ap-boot_8S.html#4fd3234f2d25fd69e90735e4aad22a5e">00006</a> .globl <a class="code" href="ap-boot_8S.html#b1cb92a8709c60591691af45d450d9f3">ap_trampoline_start</a>,<a class="code" href="smp_8c.html#e4dc28abba9d6b02a779ca1b8ffecd98">ap_trampoline_end</a>
<a name="l00007"></a>00007 .text
<a name="l00008"></a>00008 .code16
<a name="l00009"></a>00009 <a class="code" href="ap-boot_8S.html#b1cb92a8709c60591691af45d450d9f3">ap_trampoline_start</a>:
<a name="l00010"></a>00010 cli
<a name="l00011"></a>00011 cld
<a name="l00012"></a>00012
<a name="l00013"></a>00013 movw %cs,%<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a> <span class="comment">// The CPU knows its CS already, so lets use it for the other segments</span>
<a name="l00014"></a>00014 movw %<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>,%ds
<a name="l00015"></a>00015 movw %<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>,%es
<a name="l00016"></a>00016 movw %<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>,%ss
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="comment">// Do some bochs-specific bullshit</span>
<a name="l00019"></a>00019 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0x31,%<a class="code" href="ap-boot_8S.html#30e4a0d86bcf382b9396e2d95bcb31b2">al</a> <span class="comment">// '1'</span>
<a name="l00020"></a>00020 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0xe9,%dx
<a name="l00021"></a>00021 outb %<a class="code" href="ap-boot_8S.html#30e4a0d86bcf382b9396e2d95bcb31b2">al</a>,%dx
<a name="l00022"></a>00022 <span class="comment">//lgdt ap_gdt; </span>
<a name="l00023"></a>00023 lgdt ap_trampoline_gdt_limit - <a class="code" href="ap-boot_8S.html#b1cb92a8709c60591691af45d450d9f3">ap_trampoline_start</a>
<a name="l00024"></a>00024 <a class="code" href="timer_8S.html#e987d7c277439abad5828bb7b0291042">movl</a> %<a class="code" href="ap-boot_8S.html#55b794ab80e3855b3bd9c5e48621624f">cr0</a>,%<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>
<a name="l00025"></a>00025 orl $0x1,%<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>
<a name="l00026"></a>00026 <a class="code" href="timer_8S.html#e987d7c277439abad5828bb7b0291042">movl</a> %<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>,%<a class="code" href="ap-boot_8S.html#55b794ab80e3855b3bd9c5e48621624f">cr0</a> <span class="comment">// PMODE!</span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 .code32
<a name="l00029"></a>00029 .byte 0x66
<a name="l00030"></a>00030 ljmp $0x08,$(<a class="code" href="ap-boot_8S.html#1970b3f93a32547405c51f1201fe2424">ap_trampoline_32</a> - <a class="code" href="ap-boot_8S.html#b1cb92a8709c60591691af45d450d9f3">ap_trampoline_start</a>) <span class="comment">// 0x08 == KERNEL_CS</span>
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <a class="code" href="ap-boot_8S.html#1970b3f93a32547405c51f1201fe2424">ap_trampoline_32</a>:
<a name="l00033"></a>00033 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0x32,%<a class="code" href="ap-boot_8S.html#30e4a0d86bcf382b9396e2d95bcb31b2">al</a> <span class="comment">// '2'</span>
<a name="l00034"></a>00034 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0<a class="code" href="ap-boot_8S.html#d58beb3879ac361d068b0618ba2d7620">xe9</a>,%dx
<a name="l00035"></a>00035 outb %<a class="code" href="ap-boot_8S.html#30e4a0d86bcf382b9396e2d95bcb31b2">al</a>,%dx
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0<a class="code" href="ap-boot_8S.html#7e98760dd541754f39aa9a0060176908">x10</a>,%<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>
<a name="l00038"></a>00038 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>,%ds
<a name="l00039"></a>00039 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>,%es
<a name="l00040"></a>00040 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>,%<a class="code" href="structfs.html">fs</a>
<a name="l00041"></a>00041 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>,%gs
<a name="l00042"></a>00042 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>,%ss
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <span class="comment">// Spinlock</span>
<a name="l00045"></a>00045 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> ap_trampoline_spl - <a class="code" href="ap-boot_8S.html#b1cb92a8709c60591691af45d450d9f3">ap_trampoline_start</a>,%<a class="code" href="start_8S.html#f701de0cc799320aaf54092dda7b54d2">edi</a>
<a name="l00046"></a>00046 <a class="code" href="ap-boot_8S.html#61caecb5c0e14dd3866cb1c9cebd6e47">ap_spl</a>:
<a name="l00047"></a>00047 <span class="comment">//cmp $1,(%edi)</span>
<a name="l00048"></a>00048 <span class="comment">//je ap_spl</span>
<a name="l00049"></a>00049
<a name="l00050"></a>00050 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $1,%<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a> <span class="comment">// Value to be set</span>
<a name="l00051"></a>00051 <a class="code" href="ap-boot_8S.html#df1e49503579f877a12fa32eed02f088">xchgl</a> (%<a class="code" href="start_8S.html#f701de0cc799320aaf54092dda7b54d2">edi</a>),%<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>
<a name="l00052"></a><a class="code" href="ap-boot_8S.html#2d8fc5979048bee7b9610e565be8d39d">00052</a> <a class="code" href="ap-boot_8S.html#3aa51929df5d19ade1b1de48fd742744">cmp</a> $0,%<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>
<a name="l00053"></a>00053 je <a class="code" href="ap-boot_8S.html#61caecb5c0e14dd3866cb1c9cebd6e47">ap_spl</a>
<a name="l00054"></a>00054 <span class="comment">// /Spinlock</span>
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0x30,%<a class="code" href="ap-boot_8S.html#30e4a0d86bcf382b9396e2d95bcb31b2">al</a> <span class="comment">// '0'</span>
<a name="l00057"></a>00057 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0xe9,%dx
<a name="l00058"></a>00058 outb %<a class="code" href="ap-boot_8S.html#30e4a0d86bcf382b9396e2d95bcb31b2">al</a>,%dx
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> ap_trampoline_stackptr - <a class="code" href="ap-boot_8S.html#b1cb92a8709c60591691af45d450d9f3">ap_trampoline_start</a>,%<a class="code" href="ap-boot_8S.html#8771927de13b84dd7f9deec6024f83df">ebx</a>
<a name="l00061"></a>00061 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %<a class="code" href="ap-boot_8S.html#8771927de13b84dd7f9deec6024f83df">ebx</a>,%<a class="code" href="start_8S.html#00530026cdfd3cedfaee7ac4ec46aa53">esp</a>
<a name="l00062"></a>00062 add $0x1000,%<a class="code" href="ap-boot_8S.html#8771927de13b84dd7f9deec6024f83df">ebx</a>
<a name="l00063"></a>00063 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %<a class="code" href="ap-boot_8S.html#8771927de13b84dd7f9deec6024f83df">ebx</a>,ap_trampoline_stackptr - <a class="code" href="ap-boot_8S.html#b1cb92a8709c60591691af45d450d9f3">ap_trampoline_start</a>
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0x31,%<a class="code" href="ap-boot_8S.html#30e4a0d86bcf382b9396e2d95bcb31b2">al</a> <span class="comment">// '1'</span>
<a name="l00066"></a>00066 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0xe9,%dx
<a name="l00067"></a>00067 outb %<a class="code" href="ap-boot_8S.html#30e4a0d86bcf382b9396e2d95bcb31b2">al</a>,%dx
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="comment">// spinunlock</span>
<a name="l00070"></a>00070 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0,%<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>
<a name="l00071"></a>00071 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> ap_trampoline_spl - <a class="code" href="ap-boot_8S.html#b1cb92a8709c60591691af45d450d9f3">ap_trampoline_start</a>,%<a class="code" href="start_8S.html#f701de0cc799320aaf54092dda7b54d2">edi</a>
<a name="l00072"></a>00072 <a class="code" href="ap-boot_8S.html#df1e49503579f877a12fa32eed02f088">xchgl</a> (%<a class="code" href="start_8S.html#f701de0cc799320aaf54092dda7b54d2">edi</a>),%<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>
<a name="l00073"></a>00073 <span class="comment">// /spinunlock</span>
<a name="l00074"></a>00074
<a name="l00075"></a><a class="code" href="ap-boot_8S.html#763d38beb5455250c7d8bb213c9df29b">00075</a> <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0x33,%<a class="code" href="ap-boot_8S.html#30e4a0d86bcf382b9396e2d95bcb31b2">al</a> <span class="comment">// '3'</span>
<a name="l00076"></a>00076 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0xe9,%dx
<a name="l00077"></a>00077 outb %<a class="code" href="ap-boot_8S.html#30e4a0d86bcf382b9396e2d95bcb31b2">al</a>,%dx
<a name="l00078"></a>00078
<a name="l00079"></a>00079 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> <a class="code" href="ap-boot_8S.html#8fad88dacff5999a7f7fbf3a63df02a8">ap_trampoline_epoint</a>,%<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>
<a name="l00080"></a>00080 call *%<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>
<a name="l00081"></a>00081 1:
<a name="l00082"></a>00082 hlt
<a name="l00083"></a>00083 jmp 1b <span class="comment">// Halt if we ever get here somehow</span>
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="comment">// Stack.. This sucks, since CPU initialization isn't serialized</span>
<a name="l00086"></a>00086 ap_trampoline_stackptr:
<a name="l00087"></a>00087 .long 0x10000 <span class="comment">// 256KB</span>
<a name="l00088"></a>00088 <a class="code" href="ap-boot_8S.html#8fad88dacff5999a7f7fbf3a63df02a8">ap_trampoline_epoint</a>:
<a name="l00089"></a>00089 .long <a class="code" href="smp_8c.html#c7cb5b4b2fbc61966a6dfc8044a7b800">c_ap_boot</a>
<a name="l00090"></a>00090
<a name="l00091"></a>00091 ap_trampoline_spl:
<a name="l00092"></a>00092 .long 0
<a name="l00093"></a>00093 ap_gdt:
<a name="l00094"></a>00094 .long <a class="code" href="gdt_8h.html#a53ed51ff9c7d95591f1fa5724195ce0">ubixGDT</a>
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="comment">// GDT</span>
<a name="l00097"></a>00097 ap_trampoline_gdt:
<a name="l00098"></a>00098 .word 0
<a name="l00099"></a>00099 ap_trampoline_gdt_limit:
<a name="l00100"></a>00100 .word 128 <span class="comment">// Room for 32 descriptors</span>
<a name="l00101"></a>00101 ap_trampoline_gdt_base:
<a name="l00102"></a>00102 .long 0x20000 <span class="comment">// 128KB (move this later)</span>
<a name="l00103"></a>00103
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <a class="code" href="smp_8c.html#e4dc28abba9d6b02a779ca1b8ffecd98">ap_trampoline_end</a>:
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Fri Dec 15 11:18:55 2006 for UbixOS V2 by
<a href="http://www.doxygen.org/index.html">
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