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| author | yshang1 <yshang1@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-07-25 12:21:57 +0000 |
|---|---|---|
| committer | yshang1 <yshang1@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-07-25 12:21:57 +0000 |
| commit | 42eedea958591087603bbacd1c2227d2494026af (patch) | |
| tree | 2213bd86a2a23738bf9caeb10f48df6ad5a1986b /MdePkg/Library/BaseLib/Ia32/CpuId.c | |
| parent | 0f82bd55142af193e669e76fcaf02f8d835f3f39 (diff) | |
| download | edk2-platforms-42eedea958591087603bbacd1c2227d2494026af.tar.xz | |
Code Scrub for MdePkg.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5567 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32/CpuId.c')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/CpuId.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/CpuId.c b/MdePkg/Library/BaseLib/Ia32/CpuId.c index 73f12bcaee..6fbc5375bc 100644 --- a/MdePkg/Library/BaseLib/Ia32/CpuId.c +++ b/MdePkg/Library/BaseLib/Ia32/CpuId.c @@ -17,6 +17,31 @@ //
+/**
+ Retrieves CPUID information.
+
+ Executes the CPUID instruction with EAX set to the value specified by Index.
+ This function always returns Index.
+ If Eax is not NULL, then the value of EAX after CPUID is returned in Eax.
+ If Ebx is not NULL, then the value of EBX after CPUID is returned in Ebx.
+ If Ecx is not NULL, then the value of ECX after CPUID is returned in Ecx.
+ If Edx is not NULL, then the value of EDX after CPUID is returned in Edx.
+ This function is only available on IA-32 and X64.
+
+ @param Index The 32-bit value to load into EAX prior to invoking the CPUID
+ instruction.
+ @param Eax Pointer to the 32-bit EAX value returned by the CPUID
+ instruction. This is an optional parameter that may be NULL.
+ @param Ebx Pointer to the 32-bit EBX value returned by the CPUID
+ instruction. This is an optional parameter that may be NULL.
+ @param Ecx Pointer to the 32-bit ECX value returned by the CPUID
+ instruction. This is an optional parameter that may be NULL.
+ @param Edx Pointer to the 32-bit EDX value returned by the CPUID
+ instruction. This is an optional parameter that may be NULL.
+
+ @return Index
+
+**/
UINT32
EFIAPI
AsmCpuid (
|