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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/CpuIdEx.c | |
| parent | 0f82bd55142af193e669e76fcaf02f8d835f3f39 (diff) | |
| download | edk2-42eedea958591087603bbacd1c2227d2494026af.zip edk2-42eedea958591087603bbacd1c2227d2494026af.tar.gz edk2-42eedea958591087603bbacd1c2227d2494026af.tar.bz2 | |
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/CpuIdEx.c')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/CpuIdEx.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/CpuIdEx.c b/MdePkg/Library/BaseLib/Ia32/CpuIdEx.c index 2c1eca6..c685e5e 100644 --- a/MdePkg/Library/BaseLib/Ia32/CpuIdEx.c +++ b/MdePkg/Library/BaseLib/Ia32/CpuIdEx.c @@ -17,6 +17,38 @@ //
+/**
+ Retrieves CPUID information using an extended leaf identifier.
+
+ Executes the CPUID instruction with EAX set to the value specified by Index
+ and ECX set to the value specified by SubIndex. This function always returns
+ Index. This function is only available on IA-32 and x64.
+
+ 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.
+
+ @param Index The 32-bit value to load into EAX prior to invoking the
+ CPUID instruction.
+ @param SubIndex The 32-bit value to load into ECX 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
AsmCpuidEx (
|