diff options
Diffstat (limited to 'MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupport.c')
| -rw-r--r-- | MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupport.c | 316 |
1 files changed, 129 insertions, 187 deletions
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupport.c b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupport.c index 6c219d0..c650e63 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupport.c +++ b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/PlDebugSupport.c @@ -1,7 +1,7 @@ -/**@file
+/** @file
IA32 specific debug support functions
-Copyright (c) 2006 - 2007, Intel Corporation
+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
@@ -23,25 +23,24 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. IDT_ENTRY *IdtEntryTable = NULL;
DESCRIPTOR NullDesc = 0;
+/**
+ Allocate pool for a new IDT entry stub.
+
+ Copy the generic stub into the new buffer and fixup the vector number
+ and jump target address.
+
+ @param ExceptionType This is the exception type that the new stub will be created
+ for.
+ @param Stub On successful exit, *Stub contains the newly allocated entry stub.
+
+ @retval EFI_SUCCESS Always.
+
+**/
EFI_STATUS
CreateEntryStub (
IN EFI_EXCEPTION_TYPE ExceptionType,
OUT VOID **Stub
)
-/*++
-
-Routine Description: Allocate pool for a new IDT entry stub. Copy the generic
- stub into the new buffer and fixup the vector number and jump target address.
-
-Arguments:
- ExceptionType - This is the exception type that the new stub will be created
- for.
- Stub - On successful exit, *Stub contains the newly allocated entry stub.
-Returns:
- Typically EFI_SUCCESS
- other possibilities are passed through from AllocatePool
-
---*/
{
UINT8 *StubCopy;
@@ -73,14 +72,7 @@ Returns: return EFI_SUCCESS;
}
-EFI_STATUS
-HookEntry (
- IN EFI_EXCEPTION_TYPE ExceptionType,
- IN VOID (*NewCallback) ()
- )
-/*++
-
-Routine Description:
+/**
Creates a nes entry stub. Then saves the current IDT entry and replaces it
with an interrupt gate for the new entry point. The IdtEntryTable is updated
with the new registered function.
@@ -88,15 +80,17 @@ Routine Description: This code executes in boot services context. The stub entry executes in interrupt
context.
-Arguments:
- ExceptionType - specifies which vector to hook.
- NewCallback - a pointer to the new function to be registered.
+ @param ExceptionType Specifies which vector to hook.
+ @param NewCallback A pointer to the new function to be registered.
-Returns:
- EFI_SUCCESS
- Other possibilities are passed through by CreateEntryStub
+ @retval EFI_SUCCESS Always.
---*/
+**/
+EFI_STATUS
+HookEntry (
+ IN EFI_EXCEPTION_TYPE ExceptionType,
+ IN VOID (*NewCallback) ()
+ )
{
BOOLEAN OldIntFlagState;
EFI_STATUS Status;
@@ -104,81 +98,72 @@ Returns: Status = CreateEntryStub (ExceptionType, (VOID **) &IdtEntryTable[ExceptionType].StubEntry);
if (Status == EFI_SUCCESS) {
OldIntFlagState = WriteInterruptFlag (0);
- ReadIdt (ExceptionType, &(IdtEntryTable[ExceptionType].OrigDesc));
+ READ_IDT (ExceptionType, &(IdtEntryTable[ExceptionType].OrigDesc));
((UINT16 *) &IdtEntryTable[ExceptionType].OrigVector)[0] = ((UINT16 *) &IdtEntryTable[ExceptionType].OrigDesc)[0];
((UINT16 *) &IdtEntryTable[ExceptionType].OrigVector)[1] = ((UINT16 *) &IdtEntryTable[ExceptionType].OrigDesc)[3];
Vect2Desc (&IdtEntryTable[ExceptionType].NewDesc, IdtEntryTable[ExceptionType].StubEntry);
IdtEntryTable[ExceptionType].RegisteredCallback = NewCallback;
- WriteIdt (ExceptionType, &(IdtEntryTable[ExceptionType].NewDesc));
+ WRITE_IDT (ExceptionType, &(IdtEntryTable[ExceptionType].NewDesc));
WriteInterruptFlag (OldIntFlagState);
}
return Status;
}
-EFI_STATUS
-UnhookEntry (
- IN EFI_EXCEPTION_TYPE ExceptionType
- )
-/*++
-
-Routine Description:
+/**
Undoes HookEntry. This code executes in boot services context.
-Arguments:
- ExceptionType - specifies which entry to unhook
+ @param ExceptionType Specifies which entry to unhook
-Returns:
- EFI_SUCCESS
+ @retval EFI_SUCCESS Always.
---*/
+**/
+EFI_STATUS
+UnhookEntry (
+ IN EFI_EXCEPTION_TYPE ExceptionType
+ )
{
BOOLEAN OldIntFlagState;
OldIntFlagState = WriteInterruptFlag (0);
- WriteIdt (ExceptionType, &(IdtEntryTable[ExceptionType].OrigDesc));
+ WRITE_IDT (ExceptionType, &(IdtEntryTable[ExceptionType].OrigDesc));
WriteInterruptFlag (OldIntFlagState);
return EFI_SUCCESS;
}
-EFI_STATUS
-ManageIdtEntryTable (
- VOID (*NewCallback)(),
- EFI_EXCEPTION_TYPE ExceptionType
- )
-/*++
-
-Routine Description:
+/**
This is the main worker function that manages the state of the interrupt
handlers. It both installs and uninstalls interrupt handlers based on the
value of NewCallback. If NewCallback is NULL, then uninstall is indicated.
If NewCallback is non-NULL, then install is indicated.
-Arguments:
- NewCallback - If non-NULL, NewCallback specifies the new handler to register.
- If NULL, specifies that the previously registered handler should
- be uninstalled.
- ExceptionType - Indicates which entry to manage
-
-Returns:
- EFI_SUCCESS
- EFI_INVALID_PARAMETER - requested uninstalling a handler from a vector that has
- no handler registered for it
- EFI_ALREADY_STARTED - requested install to a vector that already has a handler registered.
+ @param NewCallback If non-NULL, NewCallback specifies the new handler to register.
+ If NULL, specifies that the previously registered handler should
+ be uninstalled.
+ @param ExceptionType Indicates which entry to manage.
- Other possible return values are passed through from UnHookEntry and HookEntry.
+ @retval EFI_SUCCESS Process is ok.
+ @retval EFI_INVALID_PARAMETER Requested uninstalling a handler from a vector that has
+ no handler registered for it
+ @retval EFI_ALREADY_STARTED Requested install to a vector that already has a handler registered.
+ @retval others Possible return values are passed through from UnHookEntry and HookEntry.
---*/
+**/
+EFI_STATUS
+ManageIdtEntryTable (
+ VOID (*NewCallback)(),
+ EFI_EXCEPTION_TYPE ExceptionType
+ )
{
EFI_STATUS Status;
Status = EFI_SUCCESS;
if (!FeaturePcdGet (PcdNtEmulatorEnable)) {
- if (CompareDescriptor (&IdtEntryTable[ExceptionType].NewDesc, &NullDesc)) {
+ if (COMPARE_DESCRIPTOR (&IdtEntryTable[ExceptionType].NewDesc, &NullDesc)) {
//
// we've already installed to this vector
//
@@ -208,29 +193,38 @@ Returns: return Status;
}
+/**
+ This is a DebugSupport protocol member function, hard
+ coded to support only 1 processor for now.
+
+ @param This The DebugSupport instance
+ @param MaxProcessorIndex The maximuim supported processor index
+
+ @retval EFI_SUCCESS Always returned with **MaxProcessorIndex set to 0.
+
+**/
EFI_STATUS
EFIAPI
GetMaximumProcessorIndex (
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
OUT UINTN *MaxProcessorIndex
)
-/*++
-
-Routine Description: This is a DebugSupport protocol member function.
-
-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);
}
+/**
+ DebugSupport protocol member function.
+
+ @param This The DebugSupport instance
+ @param ProcessorIndex Which processor the callback applies to.
+ @param PeriodicCallback Callback function
+
+ @retval EFI_SUCCESS Indicates the callback was registered.
+ @retval others Callback was not registered.
+
+**/
EFI_STATUS
EFIAPI
RegisterPeriodicCallback (
@@ -238,29 +232,24 @@ RegisterPeriodicCallback ( IN UINTN ProcessorIndex,
IN EFI_PERIODIC_CALLBACK PeriodicCallback
)
-/*++
-
-Routine Description: This is a DebugSupport protocol member function.
-
-Arguments:
- This - The DebugSupport instance
- ProcessorIndex - Which processor the callback applies to.
- PeriodicCallback - Callback function
+{
+ return ManageIdtEntryTable (PeriodicCallback, SYSTEM_TIMER_VECTOR);
+}
-Returns:
+/**
+ DebugSupport protocol member function.
- EFI_SUCCESS
- EFI_INVALID_PARAMETER - requested uninstalling a handler from a vector that has
- no handler registered for it
- EFI_ALREADY_STARTED - requested install to a vector that already has a handler registered.
+ This code executes in boot services context.
- Other possible return values are passed through from UnHookEntry and HookEntry.
+ @param This The DebugSupport instance
+ @param ProcessorIndex Which processor the callback applies to.
+ @param NewCallback Callback function
+ @param ExceptionType Which exception to hook
---*/
-{
- return ManageIdtEntryTable (PeriodicCallback, SYSTEM_TIMER_VECTOR);
-}
+ @retval EFI_SUCCESS Indicates the callback was registered.
+ @retval others Callback was not registered.
+**/
EFI_STATUS
EFIAPI
RegisterExceptionCallback (
@@ -269,33 +258,21 @@ RegisterExceptionCallback ( IN EFI_EXCEPTION_CALLBACK NewCallback,
IN EFI_EXCEPTION_TYPE ExceptionType
)
-/*++
-
-Routine Description:
- This is a DebugSupport protocol member function.
-
- This code executes in boot services context.
-
-Arguments:
- This - The DebugSupport instance
- ProcessorIndex - Which processor the callback applies to.
- NewCallback - Callback function
- ExceptionType - Which exception to hook
-
-Returns:
-
- EFI_SUCCESS
- EFI_INVALID_PARAMETER - requested uninstalling a handler from a vector that has
- no handler registered for it
- EFI_ALREADY_STARTED - requested install to a vector that already has a handler registered.
-
- Other possible return values are passed through from UnHookEntry and HookEntry.
-
---*/
{
return ManageIdtEntryTable (NewCallback, ExceptionType);
}
+/**
+ DebugSupport protocol member function. Calls assembly routine to flush cache.
+
+ @param This The DebugSupport instance
+ @param ProcessorIndex Which processor the callback applies to.
+ @param Start Physical base of the memory range to be invalidated
+ @param Length mininum number of bytes in instruction cache to invalidate
+
+ @retval EFI_SUCCESS Always returned.
+
+**/
EFI_STATUS
EFIAPI
InvalidateInstructionCache (
@@ -304,49 +281,27 @@ InvalidateInstructionCache ( IN VOID *Start,
IN UINT64 Length
)
-/*++
-
-Routine Description:
- This is a 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 - always return success
-
---*/
{
AsmWbinvd ();
return EFI_SUCCESS;
}
+/**
+ Initializes driver's handler registration databas.
+
+ This code executes in boot services context
+ Must be public because it's referenced from DebugSupport.c
+
+ @retval EFI_UNSUPPORTED If IA32 processor does not support FXSTOR/FXRSTOR instructions,
+ the context save will fail, so these processor's are not supported.
+ @retval EFI_OUT_OF_RESOURCES Fails to allocate memory.
+ @retval EFI_SUCCESS Initializes successfully.
+
+**/
EFI_STATUS
-plInitializeDebugSupportDriver (
+PlInitializeDebugSupportDriver (
VOID
)
-/*++
-
-Routine Description:
- Initializes driver's handler registration database.
-
- This code executes in boot services context.
-
-Arguments:
- None
-
-Returns:
- EFI_SUCCESS
- EFI_UNSUPPORTED - if IA32 processor does not support FXSTOR/FXRSTOR instructions,
- the context save will fail, so these processor's are not supported.
- EFI_OUT_OF_RESOURCES - not resource to finish initialization
-
---*/
{
EFI_EXCEPTION_TYPE ExceptionType;
@@ -381,28 +336,21 @@ ErrorCleanup: return EFI_OUT_OF_RESOURCES;
}
-EFI_STATUS
-EFIAPI
-plUnloadDebugSupportDriver (
- IN EFI_HANDLE ImageHandle
- )
-/*++
-
-Routine Description:
+/**
This is the callback that is written to the LoadedImage protocol instance
on the image handle. It uninstalls all registered handlers and frees all entry
stub memory.
- This code executes in boot services context.
-
-Arguments:
- ImageHandle - The image handle of the unload handler
-
-Returns:
+ @param ImageHandle The firmware allocated handle for the EFI image.
- EFI_SUCCESS - always return success
+ @retval EFI_SUCCESS Always.
---*/
+**/
+EFI_STATUS
+EFIAPI
+PlUnloadDebugSupportDriver (
+ IN EFI_HANDLE ImageHandle
+ )
{
EFI_EXCEPTION_TYPE ExceptionType;
@@ -414,26 +362,20 @@ Returns: return EFI_SUCCESS;
}
+/**
+ Common piece of code that invokes the registered handlers.
+
+ This code executes in exception context so no efi calls are allowed.
+
+ @param ExceptionType Exception type
+ @param ContextRecord System context
+
+**/
VOID
InterruptDistrubutionHub (
EFI_EXCEPTION_TYPE ExceptionType,
EFI_SYSTEM_CONTEXT_IA32 *ContextRecord
)
-/*++
-
-Routine Description: Common piece of code that invokes the registered handlers.
-
- This code executes in exception context so no efi calls are allowed.
-
-Arguments:
- ExceptionType - exception type
- ContextRecord - system context
-
-Returns:
-
- None
-
---*/
{
if (IdtEntryTable[ExceptionType].RegisteredCallback != NULL) {
if (ExceptionType != SYSTEM_TIMER_VECTOR) {
|