scoutos / prex-0.9.0 / bsp / hal / x86 / arch / cpufunc.S @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*- |
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2 | * Copyright (c) 2008, Kohsuke Ohtani |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. Neither the name of the author nor the names of any co-contributors |
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14 | * may be used to endorse or promote products derived from this software |
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15 | * without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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27 | * SUCH DAMAGE. |
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28 | */ |
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29 | |||
30 | /* |
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31 | * cpufunc.S - Functions to provide access to i386 specific instructions. |
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32 | */ |
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33 | |||
34 | #include <machine/asm.h> |
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35 | #include <cpu.h> |
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36 | |||
37 | .section ".text" |
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38 | |||
39 | ENTRY(cpu_idle) |
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40 | sti |
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41 | hlt |
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42 | ret |
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43 | |||
44 | ENTRY(flush_tlb) |
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45 | movl %cr3, %eax |
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46 | movl %eax, %cr3 |
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47 | ret |
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48 | |||
49 | ENTRY(flush_cache) |
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50 | wbinvd |
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51 | ret |
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52 | |||
53 | ENTRY(load_tr) |
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54 | movl 4(%esp), %eax |
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55 | ltr %ax |
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56 | ret |
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57 | |||
58 | ENTRY(load_gdt) |
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59 | movl 4(%esp), %eax |
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60 | lgdt (%eax) |
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61 | jmp 1f /* Flush the prefetch queue */ |
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62 | nop |
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63 | 1: |
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64 | movl $(KERNEL_DS), %eax |
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65 | movl %eax, %ds |
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66 | movl %eax, %es |
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67 | movl %eax, %fs |
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68 | movl %eax, %gs |
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69 | movl %eax, %ss |
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70 | movl $(KERNEL_CS), %eax |
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71 | pushl %eax |
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72 | pushl $2f |
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73 | lret |
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74 | 2: |
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75 | ret |
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76 | |||
77 | ENTRY(load_idt) |
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78 | movl 4(%esp), %eax |
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79 | lidt (%eax) |
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80 | ret |
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81 | |||
82 | ENTRY(get_cr2) |
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83 | movl %cr2, %eax |
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84 | ret |
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85 | |||
86 | ENTRY(set_cr3) |
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87 | movl 4(%esp), %eax |
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88 | movl %eax, %cr3 |
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89 | ret |
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90 | |||
91 | ENTRY(get_cr3) |
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92 | movl %cr3, %eax |
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93 | ret |
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94 | |||
95 | ENTRY(outb) |
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96 | movl 4(%esp), %edx |
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97 | movl 8(%esp), %eax |
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98 | outb %al, %dx |
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99 | ret |
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100 | |||
101 | ENTRY(inb) |
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102 | movl 4(%esp), %edx |
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103 | xorl %eax, %eax |
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104 | inb %dx, %al |
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105 | ret |
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106 | |||
107 | ENTRY(outb_p) |
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108 | movl 4(%esp), %edx |
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109 | movl 8(%esp), %eax |
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110 | outb %al, %dx |
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111 | outb %al, $0x80 |
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112 | ret |
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113 | |||
114 | ENTRY(inb_p) |
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115 | movl 4(%esp), %edx |
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116 | xorl %eax, %eax |
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117 | inb %dx, %al |
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118 | outb %al, $0x80 |
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119 | ret |