/** @file\r
- IPF specific debugsupport types, macros, and definitions.\r
+ IPF specific types, macros, and definitions for Debug Support Driver.\r
\r
-Copyright (c) 2004 - 2006 Intel Corporation \r
+Copyright (c) 2004 - 2008, Intel Corporation \r
All rights reserved. This program and the accompanying materials \r
are licensed and made available under the terms and conditions of the BSD License \r
which accompanies this distribution. The full text of the license may be found at \r
#ifndef _PLDEBUG_SUPPORT_H_\r
#define _PLDEBUG_SUPPORT_H_\r
\r
-\r
#include <Uefi.h>\r
\r
#include <Protocol/DebugSupport.h>\r
\r
#define DISABLE_INTERRUPTS 0UL\r
\r
-//\r
-// The remaining definitions comprise the protocol members.\r
-//\r
#define EFI_ISA IsaIpf\r
\r
+typedef struct {\r
+ UINT64 low;\r
+ UINT64 high;\r
+} BUNDLE;\r
+\r
/**\r
IPF specific DebugSupport driver initialization. \r
\r
\r
/**\r
Unload handler that is called during UnloadImage() - deallocates pool memory\r
- used by the driver. Must be public because it's referenced from DebugSuport.c\r
+ used by the driver. \r
+\r
+ Must be public because it's referenced from DebugSuport.c\r
\r
@param ImageHandle The firmware allocated handle for the EFI image.\r
\r
);\r
\r
/**\r
- HookStub will be copied from it's loaded location into the IVT when\r
+ C callable function that HookStub will be copied from it's loaded location into the IVT when\r
an IVT entry is hooked.\r
\r
**/\r
);\r
\r
/**\r
- Chains an interrupt handler.\r
+ C callable function to chain an interrupt handler.\r
\r
**/\r
VOID\r
);\r
\r
/**\r
- Unchains an interrupt handler.\r
+ C callable function to unchain an interrupt handler.\r
\r
**/\r
VOID\r
);\r
\r
/**\r
- This is a DebugSupport protocol member function, hard\r
- coded to support only 1 processor for now.\r
-\r
- @param This The DebugSupport instance\r
- @param MaxProcessorIndex The maximuim supported processor index\r
+ Returns the maximum value that may be used for the ProcessorIndex parameter in\r
+ RegisterPeriodicCallback() and RegisterExceptionCallback(). \r
+ \r
+ Hard coded to support only 1 processor for now.\r
\r
- @retval EFI_SUCCESS Always returned with **MaxProcessorIndex set to 0.\r
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r
+ @param MaxProcessorIndex Pointer to a caller-allocated UINTN in which the maximum supported\r
+ processor index is returned. Always 0 returned. \r
+ \r
+ @retval EFI_SUCCESS Always returned with **MaxProcessorIndex set to 0.\r
\r
**/\r
EFI_STATUS\r
);\r
\r
/**\r
- DebugSupport protocol member function.\r
-\r
- @param This The DebugSupport instance\r
- @param ProcessorIndex Which processor the callback applies to.\r
- @param PeriodicCallback Callback function\r
-\r
- @retval EFI_SUCCESS Indicates the callback was registered.\r
- @retval others Callback was not registered.\r
-\r
+ Registers a function to be called back periodically in interrupt context.\r
+ \r
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r
+ @param ProcessorIndex Specifies which processor the callback function applies to.\r
+ @param PeriodicCallback A pointer to a function of type PERIODIC_CALLBACK that is the main\r
+ periodic entry point of the debug agent.\r
+ \r
+ @retval EFI_SUCCESS The function completed successfully. \r
+ @retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback\r
+ function was previously registered. \r
+ @retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback \r
+ function. \r
**/\r
EFI_STATUS\r
EFIAPI\r
);\r
\r
/**\r
- DebugSupport protocol member function.\r
-\r
- @param This The DebugSupport instance\r
- @param ProcessorIndex Which processor the callback applies to.\r
- @param NewCallback Callback function\r
- @param ExceptionType Which exception to hook\r
-\r
- @retval EFI_SUCCESS Indicates the callback was registered.\r
- @retval others Callback was not registered.\r
-\r
+ Registers a function to be called when a given processor exception occurs.\r
+\r
+ This code executes in boot services context.\r
+ \r
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r
+ @param ProcessorIndex Specifies which processor the callback function applies to.\r
+ @param ExceptionCallback A pointer to a function of type EXCEPTION_CALLBACK that is called\r
+ when the processor exception specified by ExceptionType occurs. \r
+ @param ExceptionType Specifies which processor exception to hook. \r
+ \r
+ @retval EFI_SUCCESS The function completed successfully. \r
+ @retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback\r
+ function was previously registered. \r
+ @retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback \r
+ function.\r
**/\r
EFI_STATUS\r
EFIAPI\r
);\r
\r
/**\r
- DebugSupport protocol member function. Calls assembly routine to flush cache.\r
-\r
- @param This The DebugSupport instance\r
- @param ProcessorIndex Which processor the callback applies to.\r
- @param Start Physical base of the memory range to be invalidated\r
- @param Length mininum number of bytes in instruction cache to invalidate\r
-\r
- @retval EFI_SUCCESS Always returned.\r
+ Invalidates processor instruction cache for a memory range. Subsequent execution in this range\r
+ causes a fresh memory fetch to retrieve code to be executed. \r
+ \r
+ @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r
+ @param ProcessorIndex Specifies which processor's instruction cache is to be invalidated.\r
+ @param Start Specifies the physical base of the memory range to be invalidated. \r
+ @param Length Specifies the minimum number of bytes in the processor's instruction\r
+ cache to invalidate. \r
+ \r
+ @retval EFI_SUCCESS Always returned.\r
\r
**/\r
EFI_STATUS\r
\r
/**\r
C routine that is called for all registered exceptions. This is the main\r
- exception dispatcher. Must be public because it's referenced from AsmFuncs.s.\r
+ exception dispatcher. \r
\r
- @param ExceptionType Exception Type\r
- @param Context System Context\r
+ Must be public because it's referenced from AsmFuncs.s.\r
+\r
+ @param ExceptionType Specifies which processor exception.\r
+ @param Context System Context.\r
**/\r
VOID\r
CommonHandler (\r
IN EFI_SYSTEM_CONTEXT Context\r
);\r
\r
+/**\r
+ This is the worker function that uninstalls and removes all handlers.\r
+\r
+ @param ExceptionType Specifies which processor exception.\r
+ @param NewBundles New Boundles.\r
+ @param NewCallback A pointer to the new function to be registered.\r
+\r
+ @retval EFI_ALEADY_STARTED Ivt already hooked.\r
+ @retval EFI_SUCCESS Successfully uninstalled.\r
+\r
+**/\r
+EFI_STATUS\r
+ManageIvtEntryTable (\r
+ IN EFI_EXCEPTION_TYPE ExceptionType,\r
+ IN BUNDLE NewBundles[4],\r
+ IN VOID (*NewCallback) ()\r
+ );\r
+\r
+/**\r
+ Saves original IVT contents and inserts a few new bundles which are fixed up\r
+ to store the ExceptionType and then call the common handler.\r
+\r
+ @param ExceptionType Specifies which processor exception.\r
+ @param NewBundles New Boundles.\r
+ @param NewCallback A pointer to the new function to be hooked.\r
+\r
+**/\r
+VOID\r
+HookEntry (\r
+ IN EFI_EXCEPTION_TYPE ExceptionType,\r
+ IN BUNDLE NewBundles[4],\r
+ IN VOID (*NewCallback) ()\r
+ );\r
+\r
+/**\r
+ Restores original IVT contents when unregistering a callback function.\r
+\r
+ @param ExceptionType Specifies which processor exception.\r
+\r
+**/\r
+VOID\r
+UnhookEntry (\r
+ IN EFI_EXCEPTION_TYPE ExceptionType\r
+ );\r
+\r
+/**\r
+ Sets up cache flush and calls assembly function to chain external interrupt.\r
+\r
+ Records new callback in IvtEntryTable.\r
+\r
+ @param NewCallback A pointer to the interrupt handle.\r
+\r
+**/\r
+VOID\r
+ChainExternalInterrupt (\r
+ IN VOID (*NewCallback) ()\r
+ );\r
+\r
+/**\r
+ Sets up cache flush and calls assembly function to restore external interrupt.\r
+ Removes registered callback from IvtEntryTable.\r
+\r
+**/\r
+VOID\r
+UnchainExternalInterrupt (\r
+ VOID\r
+ );\r
+\r
+/**\r
+ Given an integer number, return the physical address of the entry point in the IFT.\r
+\r
+ @param HandlerIndex Index of the Handler \r
+ @param EntryPoint IFT Entrypoint\r
+\r
+**/\r
+VOID\r
+GetHandlerEntryPoint (\r
+ UINTN HandlerIndex,\r
+ VOID **EntryPoint\r
+ );\r
+\r
#endif\r
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