[edk2-devel] [PATCH] MdePkg/BaseCpuLib: Remove assembly for CpuFlushTlb

[Zhiguang Liu]

For different compilers, both IA32 and X64 can use
Ia32/CpuFlushTlbGcc.c, which is C code (no inline assembly code).
To simplify, remove other assemly file for CpuFlushTlb,
and rename Ia32/CpuFlushTlbGcc.c to Ia32/CpuFlushTlb.c.

Cc: Michael D Kinney <michael.d.kinney at intel.com>
Cc: Liming Gao <gaoliming at byosoft.com.cn>
Signed-off-by: Ray Ni <ray.ni at intel.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu at intel.com>
---
 MdePkg/Library/BaseCpuLib/BaseCpuLib.inf      | 10 ++----
 MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlb.c  | 12 +++----
 .../Library/BaseCpuLib/Ia32/CpuFlushTlb.nasm  | 31 ------------------
 .../Library/BaseCpuLib/Ia32/CpuFlushTlbGcc.c  | 25 ---------------
 .../Library/BaseCpuLib/X64/CpuFlushTlb.nasm   | 32 -------------------
 5 files changed, 9 insertions(+), 101 deletions(-)
 delete mode 100644 MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlb.nasm
 delete mode 100644 MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlbGcc.c
 delete mode 100644 MdePkg/Library/BaseCpuLib/X64/CpuFlushTlb.nasm

diff --git a/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf b/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
index 6b230f6e6d..0feb592638 100644
--- a/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
+++ b/MdePkg/Library/BaseCpuLib/BaseCpuLib.inf
@@ -4,7 +4,7 @@
 #  CPU Library implemented using ASM functions for IA32, X64, ARM, AARCH64,
 #  PAL CALLs for IPF, and empty functions for EBC.
 #
-#  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2007 - 2022, Intel Corporation. All rights reserved.<BR>
 #  Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
 #  Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
 #  Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
@@ -31,16 +31,12 @@
 
 [Sources.IA32]
   Ia32/CpuSleep.c | MSFT
-  Ia32/CpuFlushTlb.c | MSFT
-
   Ia32/CpuSleep.nasm| INTEL
-  Ia32/CpuFlushTlb.nasm| INTEL
-
   Ia32/CpuSleepGcc.c | GCC
-  Ia32/CpuFlushTlbGcc.c | GCC
+  Ia32/CpuFlushTlb.c
 
 [Sources.X64]
-  X64/CpuFlushTlb.nasm
+  Ia32/CpuFlushTlb.c
   X64/CpuSleep.nasm
 
 
diff --git a/MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlb.c b/MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlb.c
index 549f4eb8a0..17a351d054 100644
--- a/MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlb.c
+++ b/MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlb.c
@@ -1,11 +1,14 @@
 /** @file
-  CpuFlushTlb function.
+  CpuFlushTlb function for Ia32/X64.
 
-  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2022, Intel Corporation. All rights reserved.<BR>
+  Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
 
+#include <Library/BaseLib.h>
+
 /**
   Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU.
 
@@ -18,8 +21,5 @@ CpuFlushTlb (
   VOID
   )
 {
-  _asm {
-    mov     eax, cr3
-    mov     cr3, eax
-  }
+  AsmWriteCr3 (AsmReadCr3 ());
 }
diff --git a/MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlb.nasm b/MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlb.nasm
deleted file mode 100644
index bc3b68e3f2..0000000000
--- a/MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlb.nasm
+++ /dev/null
@@ -1,31 +0,0 @@
-;------------------------------------------------------------------------------ ;
-; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
-; SPDX-License-Identifier: BSD-2-Clause-Patent
-;
-; Module Name:
-;
-;   CpuFlushTlb.Asm
-;
-; Abstract:
-;
-;   CpuFlushTlb function
-;
-; Notes:
-;
-;------------------------------------------------------------------------------
-
-    SECTION .text
-
-;------------------------------------------------------------------------------
-; VOID
-; EFIAPI
-; CpuFlushTlb (
-;   VOID
-;   );
-;------------------------------------------------------------------------------
-global ASM_PFX(CpuFlushTlb)
-ASM_PFX(CpuFlushTlb):
-    mov     eax, cr3
-    mov     cr3, eax                    ; moving to CR3 flushes TLB
-    ret
-
diff --git a/MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlbGcc.c b/MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlbGcc.c
deleted file mode 100644
index ee44f2ea6e..0000000000
--- a/MdePkg/Library/BaseCpuLib/Ia32/CpuFlushTlbGcc.c
+++ /dev/null
@@ -1,25 +0,0 @@
-/** @file
-  CpuFlushTlb function for Ia32/X64 GCC.
-
-  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
-  Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
-  SPDX-License-Identifier: BSD-2-Clause-Patent
-
-**/
-
-#include <Library/BaseLib.h>
-
-/**
-  Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU.
-
-  Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU.
-
-**/
-VOID
-EFIAPI
-CpuFlushTlb (
-  VOID
-  )
-{
-  AsmWriteCr3 (AsmReadCr3 ());
-}
diff --git a/MdePkg/Library/BaseCpuLib/X64/CpuFlushTlb.nasm b/MdePkg/Library/BaseCpuLib/X64/CpuFlushTlb.nasm
deleted file mode 100644
index 8ddf7a2864..0000000000
--- a/MdePkg/Library/BaseCpuLib/X64/CpuFlushTlb.nasm
+++ /dev/null
@@ -1,32 +0,0 @@
-;------------------------------------------------------------------------------ ;
-; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
-; SPDX-License-Identifier: BSD-2-Clause-Patent
-;
-; Module Name:
-;
-;   CpuFlushTlb.Asm
-;
-; Abstract:
-;
-;   CpuFlushTlb function
-;
-; Notes:
-;
-;------------------------------------------------------------------------------
-
-    DEFAULT REL
-    SECTION .text
-
-;------------------------------------------------------------------------------
-; VOID
-; EFIAPI
-; CpuFlushTlb (
-;   VOID
-;   );
-;------------------------------------------------------------------------------
-global ASM_PFX(CpuFlushTlb)
-ASM_PFX(CpuFlushTlb):
-    mov     rax, cr3
-    mov     cr3, rax
-    ret
-
-- 
2.31.1.windows.1



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