1 files changed, 102 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/LoongArch/SecPeiExceptionLib.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/LoongArch/SecPeiExceptionLib.c
new file mode 100644
index 0000000000..7588d2050b
--- /dev/null
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/LoongArch/SecPeiExceptionLib.c
@@ -0,0 +1,102 @@
+/** @file SecPeiExceptionLib.c
+
+  LoongArch exception library implemenation for PEI and SEC modules.
+
+  Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/CpuLib.h>
+#include <Library/CpuExceptionHandlerLib.h>
+#include <Library/DebugLib.h>
+#include <Library/SerialPortLib.h>
+#include <Protocol/DebugSupport.h>
+#include <Register/LoongArch64/Csr.h>
+
+#include "ExceptionCommon.h"
+
+/**
+  Registers a function to be called from the processor interrupt or exception handler.
+
+  Always return EFI_UNSUPPORTED in the SEC exception initialization module.
+
+  @param  InterruptType    A pointer to the processor's current interrupt state. Set to TRUE if interrupts
+                           are enabled and FALSE if interrupts are disabled.
+  @param  InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
+                           when a processor interrupt occurs. If this parameter is NULL, then the handler
+                           will be uninstalled.
+
+  @retval EFI_UNSUPPORTED  The interrupt specified by InterruptType is not supported.
+
+**/
+EFI_STATUS
+RegisterCpuInterruptHandler (
+  IN EFI_EXCEPTION_TYPE         InterruptType,
+  IN EFI_CPU_INTERRUPT_HANDLER  InterruptHandler
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+/**
+  Common exception handler.
+
+  @param ExceptionType  Exception type.
+  @param SystemContext  Pointer to EFI_SYSTEM_CONTEXT.
+
+**/
+VOID
+EFIAPI
+CommonExceptionHandler (
+  IN     EFI_EXCEPTION_TYPE  ExceptionType,
+  IN OUT EFI_SYSTEM_CONTEXT  SystemContext
+  )
+{
+  EFI_EXCEPTION_TYPE  InterruptType;
+
+  if (ExceptionType == EXCEPT_LOONGARCH_INT) {
+    //
+    // Interrupt
+    //
+    InterruptType = GetInterruptType (SystemContext);
+    if (InterruptType == EXCEPT_LOONGARCH_INT_IPI) {
+      //
+      // APs may wake up via IPI IRQ during the SEC or PEI phase, clear the IPI interrupt and
+      // perform the remaining work.
+      //
+      IpiInterruptHandler (InterruptType, SystemContext);
+      return;
+    } else {
+      ExceptionType = InterruptType;
+    }
+  } else {
+    //
+    // Exception
+    //
+    ExceptionType >>= CSR_ESTAT_EXC_SHIFT;
+  }
+
+  DefaultExceptionHandler (ExceptionType, SystemContext);
+}
+
+/**
+  Initializes all CPU exceptions entries and provides the default exception handlers.
+
+  Always return EFI_SUCCESS in the SEC exception initialization module.
+
+  @param[in]  VectorInfo    Pointer to reserved vector list.
+
+  @retval EFI_SUCCESS       CPU Exception Entries have been successfully initialized
+                            with default exception handlers.
+
+**/
+EFI_STATUS
+EFIAPI
+InitializeCpuExceptionHandlers (
+  IN EFI_VECTOR_HANDOFF_INFO  *VectorInfo OPTIONAL
+  )
+{
+  return EFI_SUCCESS;
+}