diff options
Diffstat (limited to 'Core/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c')
| -rw-r--r-- | Core/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/Core/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c b/Core/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c new file mode 100644 index 0000000000..7e94e38ae1 --- /dev/null +++ b/Core/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c @@ -0,0 +1,183 @@ +/** @file
+ CPU exception handler library implemenation for SEC/PEIM modules.
+
+Copyright (c) 2012 - 2013, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials are licensed and made available under
+the terms and conditions of the BSD License that accompanies this distribution.
+The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php.
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <PiPei.h>
+#include "CpuExceptionCommon.h"
+
+//
+// Image Aglinment size for SEC/PEI phase
+//
+CONST UINTN mImageAlignSize = 4;
+CONST UINTN mDoFarReturnFlag = 0;
+
+/**
+ Common exception handler.
+
+ @param ExceptionType Exception type.
+ @param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
+**/
+VOID
+EFIAPI
+CommonExceptionHandler (
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN EFI_SYSTEM_CONTEXT SystemContext
+ )
+{
+ //
+ // Display ExceptionType, CPU information and Image information
+ //
+ DumpCpuContent (ExceptionType, SystemContext);
+
+ //
+ // Enter a dead loop.
+ //
+ CpuDeadLoop ();
+}
+
+/**
+ Initializes all CPU exceptions entries and provides the default exception handlers.
+
+ Caller should try to get an array of interrupt and/or exception vectors that are in use and need to
+ persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
+ If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.
+ If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.
+ Note: Before invoking this API, caller must allocate memory for IDT table and load
+ IDTR by AsmWriteIdtr().
+
+ @param[in] VectorInfo Pointer to reserved vector list.
+
+ @retval EFI_SUCCESS CPU Exception Entries have been successfully initialized
+ with default exception handlers.
+ @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
+ @retval EFI_UNSUPPORTED This function is not supported.
+
+**/
+EFI_STATUS
+EFIAPI
+InitializeCpuExceptionHandlers (
+ IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ RESERVED_VECTORS_DATA ReservedVectorData[CPU_EXCEPTION_NUM];
+ IA32_DESCRIPTOR IdtDescriptor;
+ UINTN IdtEntryCount;
+ UINT16 CodeSegment;
+ EXCEPTION_HANDLER_TEMPLATE_MAP TemplateMap;
+ IA32_IDT_GATE_DESCRIPTOR *IdtTable;
+ UINTN Index;
+ UINTN InterruptHandler;
+
+ if (VectorInfo != NULL) {
+ SetMem ((VOID *) ReservedVectorData, sizeof (RESERVED_VECTORS_DATA) * CPU_EXCEPTION_NUM, 0xff);
+ Status = ReadAndVerifyVectorInfo (VectorInfo, ReservedVectorData, CPU_EXCEPTION_NUM);
+ if (EFI_ERROR (Status)) {
+ return EFI_INVALID_PARAMETER;
+ }
+ }
+ //
+ // Read IDT descriptor and calculate IDT size
+ //
+ AsmReadIdtr (&IdtDescriptor);
+ IdtEntryCount = (IdtDescriptor.Limit + 1) / sizeof (IA32_IDT_GATE_DESCRIPTOR);
+ if (IdtEntryCount > CPU_EXCEPTION_NUM) {
+ //
+ // CPU exeption library only setup CPU_EXCEPTION_NUM exception handler at most
+ //
+ IdtEntryCount = CPU_EXCEPTION_NUM;
+ }
+ //
+ // Use current CS as the segment selector of interrupt gate in IDT
+ //
+ CodeSegment = AsmReadCs ();
+
+ AsmGetTemplateAddressMap (&TemplateMap);
+ IdtTable = (IA32_IDT_GATE_DESCRIPTOR *)IdtDescriptor.Base;
+ for (Index = 0; Index < IdtEntryCount; Index ++) {
+ IdtTable[Index].Bits.Selector = CodeSegment;
+ //
+ // Check reserved vectors attributes if has, only EFI_VECTOR_HANDOFF_DO_NOT_HOOK
+ // supported in this instance
+ //
+ if (VectorInfo != NULL) {
+ if (ReservedVectorData[Index].Attribute == EFI_VECTOR_HANDOFF_DO_NOT_HOOK) {
+ continue;
+ }
+ }
+ //
+ // Update IDT entry
+ //
+ InterruptHandler = TemplateMap.ExceptionStart + Index * TemplateMap.ExceptionStubHeaderSize;
+ ArchUpdateIdtEntry (&IdtTable[Index], InterruptHandler);
+ }
+ return EFI_SUCCESS;
+}
+
+/**
+ Initializes all CPU interrupt/exceptions entries and provides the default interrupt/exception handlers.
+
+ Caller should try to get an array of interrupt and/or exception vectors that are in use and need to
+ persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
+ If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.
+ If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.
+
+ @param[in] VectorInfo Pointer to reserved vector list.
+
+ @retval EFI_SUCCESS All CPU interrupt/exception entries have been successfully initialized
+ with default interrupt/exception handlers.
+ @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
+ @retval EFI_UNSUPPORTED This function is not supported.
+
+**/
+EFI_STATUS
+EFIAPI
+InitializeCpuInterruptHandlers (
+ IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
+ )
+{
+ return EFI_UNSUPPORTED;
+}
+
+/**
+ Registers a function to be called from the processor interrupt handler.
+
+ This function registers and enables the handler specified by InterruptHandler for a processor
+ interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the
+ handler for the processor interrupt or exception type specified by InterruptType is uninstalled.
+ The installed handler is called once for each processor interrupt or exception.
+ NOTE: This function should be invoked after InitializeCpuExceptionHandlers() or
+ InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED returned.
+
+ @param[in] InterruptType Defines which interrupt or exception to hook.
+ @param[in] 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_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
+ @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was
+ previously installed.
+ @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
+ previously installed.
+ @retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported,
+ or this function is not supported.
+**/
+EFI_STATUS
+EFIAPI
+RegisterCpuInterruptHandler (
+ IN EFI_EXCEPTION_TYPE InterruptType,
+ IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
+ )
+{
+ return EFI_UNSUPPORTED;
+}
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