scoutos / prex-0.9.0 / bsp / drv / 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 | #include <machine/asm.h> |
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31 | |||
32 | |||
33 | ENTRY(breakpoint) |
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34 | int $3 |
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35 | ret |
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36 | |||
37 | ENTRY(rdmsr) |
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38 | movl 4(%esp), %ecx |
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39 | rdmsr |
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40 | movl 8(%esp), %ecx |
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41 | movl %eax, (%ecx) |
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42 | movl 12(%esp), %ecx |
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43 | movl %edx, (%ecx) |
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44 | ret |
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45 | |||
46 | ENTRY(wrmsr) |
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47 | movl 4(%esp), %ecx |
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48 | movl 8(%esp), %eax |
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49 | movl 12(%esp), %edx |
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50 | wrmsr |
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51 | ret |
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52 | |||
53 | ENTRY(cpuid) |
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54 | pushl %ebx |
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55 | pushl %edi |
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56 | movl 12(%esp), %eax |
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57 | movl 16(%esp), %edi |
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58 | cpuid |
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59 | movl %eax, 0(%edi) |
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60 | movl %ebx, 4(%edi) |
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61 | movl %ecx, 8(%edi) |
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62 | movl %edx, 12(%edi) |
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63 | popl %edi |
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64 | popl %ebx |
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65 | ret |