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From: Ruiyu Ni <ruiyu.ni@intel.com>
To: edk2-devel@lists.01.org
Cc: Jeff Fan <jeff.fan@intel.com>
Subject: [PATCH 04/10] UefiCpuPkg/MtrrLib: GetVariableMtrrCountWorker uses definitions in Msr.h
Date: Fri,  2 Sep 2016 21:58:44 +0800	[thread overview]
Message-ID: <20160902135850.251164-5-ruiyu.ni@intel.com> (raw)
In-Reply-To: <20160902135850.251164-1-ruiyu.ni@intel.com>

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Jeff Fan <jeff.fan@intel.com>
---
 UefiCpuPkg/Library/MtrrLib/MtrrLib.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
index 38083d4..7e8a19a 100644
--- a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
+++ b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
@@ -124,11 +124,11 @@ GetVariableMtrrCountWorker (
   VOID
   )
 {
-  UINT32  VariableMtrrCount;
+  MSR_IA32_MTRRCAP_REGISTER MtrrCap;
 
-  VariableMtrrCount = (UINT32)(AsmReadMsr64 (MTRR_LIB_IA32_MTRR_CAP) & MTRR_LIB_IA32_MTRR_CAP_VCNT_MASK);
-  ASSERT (VariableMtrrCount <= MTRR_NUMBER_OF_VARIABLE_MTRR);
-  return VariableMtrrCount;
+  MtrrCap.Uint64 = AsmReadMsr64 (MSR_IA32_MTRRCAP);
+  ASSERT (MtrrCap.Bits.VCNT <= MTRR_NUMBER_OF_VARIABLE_MTRR);
+  return MtrrCap.Bits.VCNT;
 }
 
 /**
-- 
2.9.0.windows.1



  parent reply	other threads:[~2016-09-02 13:58 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-02 13:58 [PATCH 00/10] Enhance MtrrLib to find out the optimal MTRR solution Ruiyu Ni
2016-09-02 13:58 ` [PATCH 01/10] UefiCpuPkg/MtrrLib: Correct typo in comments and remove TABs Ruiyu Ni
2016-09-02 13:58 ` [PATCH 02/10] UefiCpuPkg/MtrrLib: Add CacheInvalid enum type to MtrrLib.h Ruiyu Ni
2016-09-02 13:58 ` [PATCH 03/10] UefiCpuPkg/MtrrLib: IsMtrrSupported uses definitions in Msr.h Ruiyu Ni
2016-09-02 13:58 ` Ruiyu Ni [this message]
2016-09-02 13:58 ` [PATCH 05/10] UefiCpuPkg/MtrrLib: Add MtrrLib prefix to ProgramFixedMtrr Ruiyu Ni
2016-09-02 13:58 ` [PATCH 06/10] UefiCpuPkg/MtrrLib: Add MtrrLib prefix to several internal functions Ruiyu Ni
2016-09-02 13:58 ` [PATCH 07/10] UefiCpuPkg/MtrrLib: MtrrLibInitializeMtrrMask() uses definitions in CpuId.h Ruiyu Ni
2016-09-02 13:58 ` [PATCH 08/10] UefiCpuPkg/MtrrLib: Use a better algorithm to calculate MTRR Ruiyu Ni
2016-09-02 13:58 ` [PATCH 09/10] UefiCpuPkg/MtrrLib: Refine MtrrGetMemoryAttributeByAddressWorker Ruiyu Ni
2016-09-02 13:58 ` [PATCH 10/10] UefiCpuPkg/MtrrLib: All functions use definitions in Msr.h Ruiyu Ni
  -- strict thread matches above, loose matches on Subject: below --
2017-03-29  3:03 [PATCH 00/10] Use a better algorithm to calculate MTRR Ruiyu Ni
2017-03-29  3:03 ` [PATCH 04/10] UefiCpuPkg/MtrrLib: GetVariableMtrrCountWorker uses definitions in Msr.h Ruiyu Ni

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