scoutos / prex-0.9.0 / bsp / drv / x86 / arch / cpufunc.S @ 03e9c04a
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/*- |
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* Copyright (c) 2008, Kohsuke Ohtani |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the author nor the names of any co-contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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|
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#include <machine/asm.h> |
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|
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|
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ENTRY(breakpoint) |
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int $3 |
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ret |
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|
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ENTRY(rdmsr) |
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movl 4(%esp), %ecx |
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rdmsr |
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movl 8(%esp), %ecx |
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movl %eax, (%ecx) |
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movl 12(%esp), %ecx |
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movl %edx, (%ecx) |
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ret |
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|
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ENTRY(wrmsr) |
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movl 4(%esp), %ecx |
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movl 8(%esp), %eax |
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movl 12(%esp), %edx |
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wrmsr |
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ret |
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|
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ENTRY(cpuid) |
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pushl %ebx |
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pushl %edi |
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movl 12(%esp), %eax |
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movl 16(%esp), %edi |
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cpuid |
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movl %eax, 0(%edi) |
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movl %ebx, 4(%edi) |
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movl %ecx, 8(%edi) |
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movl %edx, 12(%edi) |
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popl %edi |
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popl %ebx |
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ret |