diff options
| author | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-11-04 06:11:01 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-11-04 06:11:01 +0000 |
| commit | 4973f32dfc26271ba4fc29a27358635f8e93fc27 (patch) | |
| tree | 9477e53608ef70c5671aafef59f3158ae19d4cd3 /MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.c | |
| parent | 5d2692a4992b19c29319ea8e184cf343b46e37cc (diff) | |
| download | edk2-4973f32dfc26271ba4fc29a27358635f8e93fc27.zip edk2-4973f32dfc26271ba4fc29a27358635f8e93fc27.tar.gz edk2-4973f32dfc26271ba4fc29a27358635f8e93fc27.tar.bz2 | |
Renamed remotely
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6367 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.c')
| -rw-r--r-- | MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.c | 574 |
1 files changed, 574 insertions, 0 deletions
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.c b/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.c new file mode 100644 index 0000000..cf9bcfe --- /dev/null +++ b/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.c @@ -0,0 +1,574 @@ +/**@file
+ IPF specific debug support functions
+
+Copyright (c) 2006 - 2008, Intel Corporation
+All rights reserved. This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which 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.
+
+**/
+
+//
+// private header files
+//
+#include "plDebugSupport.h"
+
+BOOLEAN mInHandler = FALSE;
+
+typedef struct {
+ UINT64 low;
+ UINT64 high;
+} BUNDLE;
+
+//
+// number of bundles to swap in ivt
+//
+#define NUM_BUNDLES_IN_STUB 5
+#define NUM_IVT_ENTRIES 64
+
+typedef struct {
+ BUNDLE OrigBundles[NUM_BUNDLES_IN_STUB];
+ VOID (*RegisteredCallback) ();
+} IVT_ENTRY;
+
+EFI_STATUS
+ManageIvtEntryTable (
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN BUNDLE NewBundles[4],
+ IN VOID (*NewCallback) ()
+ );
+
+VOID
+HookEntry (
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN BUNDLE NewBundles[4],
+ IN VOID (*NewCallback) ()
+ );
+
+VOID
+UnhookEntry (
+ IN EFI_EXCEPTION_TYPE ExceptionType
+ );
+
+VOID
+ChainExternalInterrupt (
+ IN VOID (*NewCallback) ()
+ );
+
+VOID
+UnchainExternalInterrupt (
+ VOID
+ );
+
+VOID
+GetHandlerEntryPoint (
+ UINTN HandlerIndex,
+ VOID **EntryPoint
+ );
+
+IVT_ENTRY IvtEntryTable[NUM_IVT_ENTRIES];
+
+//
+// IPF context record is overallocated by 512 bytes to guarantee a 512 byte alignment exists
+// within the buffer and still have a large enough buffer to hold a whole IPF context record.
+//
+UINT8 IpfContextBuf[sizeof (EFI_SYSTEM_CONTEXT_IPF) + 512];
+
+//
+// The PatchSaveBuffer is used to store the original bundles from the IVT where it is patched
+// with the common handler.
+//
+UINT8 PatchSaveBuffer[0x400];
+UINTN ExternalInterruptCount;
+
+EFI_STATUS
+plInitializeDebugSupportDriver (
+ VOID
+ )
+/*++
+
+Routine Description:
+ IPF specific DebugSupport driver initialization. Must be public because it's
+ referenced from DebugSupport.c
+
+Arguments:
+
+Returns:
+
+ EFI_SUCCESS
+
+--*/
+{
+ SetMem (IvtEntryTable, sizeof (IvtEntryTable), 0);
+ ExternalInterruptCount = 0;
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+plUnloadDebugSupportDriver (
+ IN EFI_HANDLE ImageHandle
+ )
+/*++
+
+Routine Description:
+ Unload handler that is called during UnloadImage() - deallocates pool memory
+ used by the driver. Must be public because it's referenced from DebugSuport.c
+
+Arguments:
+ ImageHandle - Image handle
+
+Returns:
+
+ EFI_STATUS - anything other than EFI_SUCCESS indicates the callback was not registered.
+
+--*/
+{
+ EFI_EXCEPTION_TYPE ExceptionType;
+
+ for (ExceptionType = 0; ExceptionType < NUM_IVT_ENTRIES; ExceptionType++) {
+ ManageIvtEntryTable (ExceptionType, NULL, NULL);
+ }
+
+ return EFI_SUCCESS;
+}
+
+VOID
+CommonHandler (
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN EFI_SYSTEM_CONTEXT Context
+ )
+/*++
+
+Routine Description:
+ C routine that is called for all registered exceptions. This is the main
+ exception dispatcher. Must be public because it's referenced from AsmFuncs.s.
+
+Arguments:
+ ExceptionType - Exception Type
+ Context - System Context
+
+Returns:
+
+ Nothing
+
+--*/
+{
+ DEBUG_CODE_BEGIN ();
+ if (mInHandler) {
+ DEBUG ((EFI_D_INFO, "ERROR: Re-entered debugger!\n"
+ " ExceptionType == %X\n"
+ " Context == %X\n"
+ " Context.SystemContextIpf->CrIip == %X\n"
+ " Context.SystemContextIpf->CrIpsr == %X\n"
+ " mInHandler == %X\n",
+ ExceptionType,
+ Context,
+ Context.SystemContextIpf->CrIip,
+ Context.SystemContextIpf->CrIpsr,
+ mInHandler));
+ }
+ DEBUG_CODE_END ();
+
+ ASSERT (!mInHandler);
+ mInHandler = TRUE;
+ if (IvtEntryTable[ExceptionType].RegisteredCallback != NULL) {
+ if (ExceptionType != EXCEPT_IPF_EXTERNAL_INTERRUPT) {
+ IvtEntryTable[ExceptionType].RegisteredCallback (ExceptionType, Context.SystemContextIpf);
+ } else {
+ IvtEntryTable[ExceptionType].RegisteredCallback (Context.SystemContextIpf);
+ }
+ } else {
+ ASSERT (0);
+ }
+
+ mInHandler = FALSE;
+}
+
+VOID
+GetHandlerEntryPoint (
+ UINTN HandlerIndex,
+ VOID **EntryPoint
+ )
+/*++
+
+Routine Description:
+ Given an integer number, return the physical address of the entry point in the IFT
+
+Arguments:
+ HandlerIndex - Index of the Handler
+ EntryPoint - IFT Entrypoint
+
+Returns:
+
+ Nothing
+
+--*/
+{
+ UINT8 *TempPtr;
+
+ //
+ // get base address of IVT
+ //
+ TempPtr = GetIva ();
+
+ if (HandlerIndex < 20) {
+ //
+ // first 20 provide 64 bundles per vector
+ //
+ TempPtr += 0x400 * HandlerIndex;
+ } else {
+ //
+ // the rest provide 16 bundles per vector
+ //
+ TempPtr += 0x5000 + 0x100 * (HandlerIndex - 20);
+ }
+
+ *EntryPoint = (VOID *) TempPtr;
+}
+
+EFI_STATUS
+ManageIvtEntryTable (
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN BUNDLE NewBundles[NUM_BUNDLES_IN_STUB],
+ IN VOID (*NewCallback) ()
+ )
+/*++
+
+Routine Description:
+ This is the worker function that installs and removes all handlers
+
+Arguments:
+ ExceptionType - Exception Type
+ NewBundles - New Boundles
+ NewCallback - New Callback
+
+Returns:
+
+ EFI_STATUS - any return other than EFI_SUCCESS indicates the request was not
+ satisfied.
+ EFI_ALEADY_STARTED - Ivt already hooked.
+
+--*/
+{
+ BUNDLE *B0Ptr;
+ UINT64 InterruptFlags;
+ EFI_TPL OldTpl;
+
+ //
+ // Get address of bundle 0
+ //
+ GetHandlerEntryPoint (ExceptionType, (VOID **) &B0Ptr);
+
+ if (IvtEntryTable[ExceptionType].RegisteredCallback != NULL) {
+ //
+ // we've already installed to this vector
+ //
+ if (NewCallback != NULL) {
+ //
+ // if the input handler is non-null, error
+ //
+ return EFI_ALREADY_STARTED;
+ } else {
+ //
+ // else remove the previously installed handler
+ //
+ OldTpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
+ InterruptFlags = ProgramInterruptFlags (DISABLE_INTERRUPTS);
+ if (ExceptionType == EXCEPT_IPF_EXTERNAL_INTERRUPT) {
+ UnchainExternalInterrupt ();
+ } else {
+ UnhookEntry (ExceptionType);
+ }
+
+ ProgramInterruptFlags (InterruptFlags);
+ gBS->RestoreTPL (OldTpl);
+ //
+ // re-init IvtEntryTable
+ //
+ SetMem (&IvtEntryTable[ExceptionType], sizeof (IVT_ENTRY), 0);
+ }
+ } else {
+ //
+ // no user handler installed on this vector
+ //
+ if (NewCallback != NULL) {
+ OldTpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
+ InterruptFlags = ProgramInterruptFlags (DISABLE_INTERRUPTS);
+ if (ExceptionType == EXCEPT_IPF_EXTERNAL_INTERRUPT) {
+ ChainExternalInterrupt (NewCallback);
+ } else {
+ HookEntry (ExceptionType, NewBundles, NewCallback);
+ }
+
+ ProgramInterruptFlags (InterruptFlags);
+ gBS->RestoreTPL (OldTpl);
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+VOID
+HookEntry (
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN BUNDLE NewBundles[4],
+ IN VOID (*NewCallback) ()
+ )
+/*++
+
+Routine Description:
+ Saves original IVT contents and inserts a few new bundles which are fixed up
+ to store the ExceptionType and then call the common handler.
+
+Arguments:
+ ExceptionType - Exception Type
+ NewBundles - New Boundles
+ NewCallback - New Callback
+
+Returns:
+
+ Nothing
+
+--*/
+{
+ BUNDLE *FixupBundle;
+ BUNDLE *B0Ptr;
+
+ //
+ // Get address of bundle 0
+ //
+ GetHandlerEntryPoint (ExceptionType, (VOID **) &B0Ptr);
+
+ //
+ // copy original bundles from IVT to IvtEntryTable so we can restore them later
+ //
+ CopyMem (
+ IvtEntryTable[ExceptionType].OrigBundles,
+ B0Ptr,
+ sizeof (BUNDLE) * NUM_BUNDLES_IN_STUB
+ );
+ //
+ // insert new B0
+ //
+ CopyMem (B0Ptr, NewBundles, sizeof (BUNDLE) * NUM_BUNDLES_IN_STUB);
+
+ //
+ // fixup IVT entry so it stores its index and whether or not to chain...
+ //
+ FixupBundle = B0Ptr + 2;
+ FixupBundle->high |= ExceptionType << 36;
+
+ InstructionCacheFlush (B0Ptr, 5);
+ IvtEntryTable[ExceptionType].RegisteredCallback = NewCallback;
+}
+
+VOID
+UnhookEntry (
+ IN EFI_EXCEPTION_TYPE ExceptionType
+ )
+/*++
+
+Routine Description:
+ Restores original IVT contents when unregistering a callback function
+
+Arguments:
+ ExceptionType - Exception Type
+ NewBundles - New Boundles
+ NewCallback - New Callback
+
+Returns:
+
+ Nothing
+
+--*/
+{
+ BUNDLE *B0Ptr;
+
+ //
+ // Get address of bundle 0
+ //
+ GetHandlerEntryPoint (ExceptionType, (VOID **) &B0Ptr);
+ //
+ // restore original bundles in IVT
+ //
+ CopyMem (
+ B0Ptr,
+ IvtEntryTable[ExceptionType].OrigBundles,
+ sizeof (BUNDLE) * NUM_BUNDLES_IN_STUB
+ );
+ InstructionCacheFlush (B0Ptr, 5);
+}
+
+VOID
+ChainExternalInterrupt (
+ IN VOID (*NewCallback) ()
+ )
+/*++
+
+Routine Description:
+ Sets up cache flush and calls assembly function to chain external interrupt.
+ Records new callback in IvtEntryTable.
+
+Arguments:
+ NewCallback - New Callback
+
+Returns:
+
+ Nothing
+
+--*/
+{
+ VOID *Start;
+
+ Start = (VOID *) ((UINT8 *) GetIva () + 0x400 * EXCEPT_IPF_EXTERNAL_INTERRUPT + 0x400);
+ IvtEntryTable[EXCEPT_IPF_EXTERNAL_INTERRUPT].RegisteredCallback = NewCallback;
+ ChainHandler ();
+ InstructionCacheFlush (Start, 0x400);
+}
+
+VOID
+UnchainExternalInterrupt (
+ VOID
+ )
+/*++
+
+Routine Description:
+ Sets up cache flush and calls assembly function to restore external interrupt.
+ Removes registered callback from IvtEntryTable.
+
+Arguments:
+ Nothing
+
+Returns:
+
+ Nothing
+
+--*/
+{
+ VOID *Start;
+
+ Start = (VOID *) ((UINT8 *) GetIva () + 0x400 * EXCEPT_IPF_EXTERNAL_INTERRUPT + 0x400);
+ UnchainHandler ();
+ InstructionCacheFlush (Start, 0x400);
+ IvtEntryTable[EXCEPT_IPF_EXTERNAL_INTERRUPT].RegisteredCallback = NULL;
+}
+
+//
+// The rest of the functions in this file are all member functions for the
+// DebugSupport protocol
+//
+
+EFI_STATUS
+EFIAPI
+GetMaximumProcessorIndex (
+ IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
+ OUT UINTN *MaxProcessorIndex
+ )
+/*++
+
+Routine Description: This is a DebugSupport protocol member function. Hard
+ coded to support only 1 processor for now.
+
+Arguments:
+ This - The DebugSupport instance
+ MaxProcessorIndex - The maximuim supported processor index
+
+Returns:
+ Always returns EFI_SUCCESS with *MaxProcessorIndex set to 0
+
+--*/
+{
+ *MaxProcessorIndex = 0;
+ return (EFI_SUCCESS);
+}
+
+EFI_STATUS
+EFIAPI
+RegisterPeriodicCallback (
+ IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
+ IN UINTN ProcessorIndex,
+ IN EFI_PERIODIC_CALLBACK NewPeriodicCallback
+ )
+/*++
+
+Routine Description:
+ DebugSupport protocol member function
+
+Arguments:
+ This - The DebugSupport instance
+ ProcessorIndex - Which processor the callback applies to.
+ PeriodicCallback - Callback function
+
+Returns:
+
+ EFI_STATUS - anything other than EFI_SUCCESS indicates the callback was not registered.
+
+--*/
+{
+ return ManageIvtEntryTable (EXCEPT_IPF_EXTERNAL_INTERRUPT, NULL, NewPeriodicCallback);
+}
+
+EFI_STATUS
+EFIAPI
+RegisterExceptionCallback (
+ IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
+ IN UINTN ProcessorIndex,
+ IN EFI_EXCEPTION_CALLBACK NewCallback,
+ IN EFI_EXCEPTION_TYPE ExceptionType
+ )
+/*++
+
+Routine Description:
+ DebugSupport protocol member function
+
+Arguments:
+ This - The DebugSupport instance
+ ProcessorIndex - Which processor the callback applies to.
+ NewCallback - Callback function
+ ExceptionType - Which exception to hook
+
+Returns:
+
+ EFI_STATUS - anything other than EFI_SUCCESS indicates the callback was not registered.
+
+--*/
+{
+ return ManageIvtEntryTable (
+ ExceptionType,
+ (BUNDLE *) ((EFI_PLABEL *) HookStub)->EntryPoint,
+ NewCallback
+ );
+}
+
+EFI_STATUS
+EFIAPI
+InvalidateInstructionCache (
+ IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
+ IN UINTN ProcessorIndex,
+ IN VOID *Start,
+ IN UINTN Length
+ )
+/*++
+
+Routine Description:
+ DebugSupport protocol member function. Calls assembly routine to flush cache.
+
+Arguments:
+ This - The DebugSupport instance
+ ProcessorIndex - Which processor the callback applies to.
+ Start - Physical base of the memory range to be invalidated
+ Length - mininum number of bytes in instruction cache to invalidate
+
+Returns:
+ EFI_SUCCESS
+
+--*/
+{
+ InstructionCacheFlush (Start, Length);
+ return (EFI_SUCCESS);
+}
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