diff options
Diffstat (limited to 'UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c')
| -rw-r--r-- | UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c | 142 |
1 files changed, 131 insertions, 11 deletions
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c index ebd9fe32b7..f2e7c81257 100644 --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c @@ -1,7 +1,7 @@ /** @file
- CPU Exception Library provides SEC/PEIM CPU exception handler.
+ CPU exception handler library implemenation for SEC/PEIM modules.
-Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
+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
@@ -18,7 +18,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. //
// Image Aglinment size for SEC/PEI phase
//
-CONST UINTN mImageAlignSize = 4;
+CONST UINTN mImageAlignSize = 4;
+CONST UINTN mDoFarReturnFlag = 0;
/**
Common exception handler.
@@ -45,19 +46,138 @@ CommonExceptionHandler ( }
/**
- Setup CPU exception handlers.
-
- This API will setups the CPU exception handler to display CPU contents and run into
- 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.
+
**/
-VOID
+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
-SetupCpuExceptionHandlers (
- IN VOID
+InitializeCpuInterruptHandlers (
+ IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
)
{
- InternalSetupCpuExceptionHandlers ();
+ 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;
+}
\ No newline at end of file |