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| author | Kirkendall, Garrett <garrett.kirkendall@amd.com> | 2020-06-22 08:18:24 -0500 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-07-07 23:25:16 +0000 |
| commit | df667535ed45086bce89d48044009afe3c9792e6 (patch) | |
| tree | 7b0823452a432521f63e06b96dad022270b52f00 /UefiCpuPkg/Library/BaseUefiCpuLib/BaseUefiCpuLib.c | |
| parent | 7da5f343bcf04a2fa1bfb33243b4586d7d174514 (diff) | |
| download | edk2-df667535ed45086bce89d48044009afe3c9792e6.tar.gz edk2-df667535ed45086bce89d48044009afe3c9792e6.tar.bz2 edk2-df667535ed45086bce89d48044009afe3c9792e6.zip | |
UefiCpuPkg: Move StandardSignatureIsAuthenticAMD to BaseUefiCpuLib
Refactor StandardSignatureIsAuthenticAMD into BaseUefiCpuLib from
separate copies in BaseXApicLib, BaseXApicX2ApicLib, and MpInitLib.
This allows for future use of StandarSignatureIsAuthinticAMD without
creating more instances in other modules.
This function allows IA32/X64 code to determine if it is running on an
AMD brand processor.
UefiCpuLib is already included directly or indirectly in all modified
modules. Complete move is made in this change.
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Garrett Kirkendall <garrett.kirkendall@amd.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Message-Id: <20200622131825.1352-4-Garrett.Kirkendall@amd.com>
Diffstat (limited to 'UefiCpuPkg/Library/BaseUefiCpuLib/BaseUefiCpuLib.c')
| -rw-r--r-- | UefiCpuPkg/Library/BaseUefiCpuLib/BaseUefiCpuLib.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/BaseUefiCpuLib/BaseUefiCpuLib.c b/UefiCpuPkg/Library/BaseUefiCpuLib/BaseUefiCpuLib.c new file mode 100644 index 0000000000..c2cc3ff9a7 --- /dev/null +++ b/UefiCpuPkg/Library/BaseUefiCpuLib/BaseUefiCpuLib.c @@ -0,0 +1,38 @@ +/** @file
+ This library defines some routines that are generic for IA32 family CPU.
+
+ The library routines are UEFI specification compliant.
+
+ Copyright (c) 2020, AMD Inc. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Register/Intel/Cpuid.h>
+#include <Register/Amd/Cpuid.h>
+
+#include <Library/BaseLib.h>
+#include <Library/UefiCpuLib.h>
+
+/**
+ Determine if the standard CPU signature is "AuthenticAMD".
+
+ @retval TRUE The CPU signature matches.
+ @retval FALSE The CPU signature does not match.
+
+**/
+BOOLEAN
+EFIAPI
+StandardSignatureIsAuthenticAMD (
+ VOID
+ )
+{
+ UINT32 RegEbx;
+ UINT32 RegEcx;
+ UINT32 RegEdx;
+
+ AsmCpuid (CPUID_SIGNATURE, NULL, &RegEbx, &RegEcx, &RegEdx);
+ return (RegEbx == CPUID_SIGNATURE_AUTHENTIC_AMD_EBX &&
+ RegEcx == CPUID_SIGNATURE_AUTHENTIC_AMD_ECX &&
+ RegEdx == CPUID_SIGNATURE_AUTHENTIC_AMD_EDX);
+}
|