[edk2-devel] [PATCH v4 04/37] MdePkg: Add LoongArch64 local interrupt function set into BaseLib

["Chao Li" <lichao@loongson.cn>]

Adding LoongArch local interrupt function set, which is used to control
the opening or closing of the local interrupt when the global interrupt
is enabled.

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4584

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Chao Li <lichao@loongson.cn>
Acked-by: Michael D Kinney <michael.d.kinney@intel.com>
---
 MdePkg/Include/Library/BaseLib.h              | 20 +++++++++++++++++
 .../BaseLib/LoongArch64/DisableInterrupts.S   | 22 ++++++++++++++-----
 .../BaseLib/LoongArch64/EnableInterrupts.S    | 22 ++++++++++++++-----
 3 files changed, 54 insertions(+), 10 deletions(-)

diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h
index a9a69c734c..93a014cd49 100644
--- a/MdePkg/Include/Library/BaseLib.h
+++ b/MdePkg/Include/Library/BaseLib.h
@@ -249,6 +249,26 @@ SetTlbRebaseAddress (
   IN UINT64
   );
 
+/**
+  Enables local CPU interrupts.
+
+  @param  Needs to enable local interrupt bit.
+**/
+VOID
+EnableLocalInterrupts (
+  IN UINT16
+  );
+
+/**
+  Disables local CPU interrupts.
+
+  @param  Needs to disable local interrupt bit.
+**/
+VOID
+DisableLocalInterrupts (
+  IN UINT16
+  );
+
 #endif // defined (MDE_CPU_LOONGARCH64)
 
 //
diff --git a/MdePkg/Library/BaseLib/LoongArch64/DisableInterrupts.S b/MdePkg/Library/BaseLib/LoongArch64/DisableInterrupts.S
index 0f228339af..5de10e9e7a 100644
--- a/MdePkg/Library/BaseLib/LoongArch64/DisableInterrupts.S
+++ b/MdePkg/Library/BaseLib/LoongArch64/DisableInterrupts.S
@@ -1,21 +1,33 @@
 #------------------------------------------------------------------------------
 #
-# LoongArch interrupt disable
+# LoongArch interrupt disable operations
 #
-# Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
+# Copyright (c) 2023, Loongson Technology Corporation Limited. All rights reserved.<BR>
 #
 # SPDX-License-Identifier: BSD-2-Clause-Patent
 #
 #------------------------------------------------------------------------------
 
+#include <Base.h>
+#include <Register/LoongArch64/Csr.h>
+
+ASM_GLOBAL ASM_PFX(DisableLocalInterrupts)
 ASM_GLOBAL ASM_PFX(DisableInterrupts)
 
 #/**
-#  Disables CPU interrupts.
+#  Disables local CPU interrupts.
+#
+#  @param  Needs to disable local interrupt bit.
 #**/
+ASM_PFX(DisableLocalInterrupts):
+  csrxchg $zero, $a0, LOONGARCH_CSR_ECFG
+  jirl    $zero, $ra, 0
 
+#/**
+#  Disables global CPU interrupts.
+#**/
 ASM_PFX(DisableInterrupts):
-  li.w    $t0, 0x4
-  csrxchg $zero, $t0, 0x0
+  li.w    $t0, BIT2
+  csrxchg $zero, $t0, LOONGARCH_CSR_CRMD
   jirl    $zero, $ra, 0
   .end
diff --git a/MdePkg/Library/BaseLib/LoongArch64/EnableInterrupts.S b/MdePkg/Library/BaseLib/LoongArch64/EnableInterrupts.S
index 3c34fb2cdd..73adcd7b0c 100644
--- a/MdePkg/Library/BaseLib/LoongArch64/EnableInterrupts.S
+++ b/MdePkg/Library/BaseLib/LoongArch64/EnableInterrupts.S
@@ -1,21 +1,33 @@
 #------------------------------------------------------------------------------
 #
-# LoongArch interrupt enable
+# LoongArch interrupt enable operations
 #
-# Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
+# Copyright (c) 2023, Loongson Technology Corporation Limited. All rights reserved.<BR>
 #
 # SPDX-License-Identifier: BSD-2-Clause-Patent
 #
 #------------------------------------------------------------------------------
 
+#include <Base.h>
+#include <Register/LoongArch64/Csr.h>
+
+ASM_GLOBAL ASM_PFX(EnableLocalInterrupts)
 ASM_GLOBAL ASM_PFX(EnableInterrupts)
 
 #/**
-#  Enables CPU interrupts.
+#  Enables local CPU interrupts.
+#
+#  @param  Needs to enable local interrupt bit.
 #**/
+ASM_PFX(EnableLocalInterrupts):
+  csrxchg $a0, $a0, LOONGARCH_CSR_ECFG
+  jirl    $zero, $ra, 0
 
+#/**
+#  Enables global CPU interrupts.
+#**/
 ASM_PFX(EnableInterrupts):
-  li.w    $t0, 0x4
-  csrxchg $t0, $t0, 0x0
+  li.w    $t0, BIT2
+  csrxchg $t0, $t0, LOONGARCH_CSR_CRMD
   jirl    $zero, $ra, 0
   .end
-- 
2.27.0



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