sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Update SMM Core to use SMM Mode as soon as SMM Mode is available

Browse Source 
Signed-off-by: mdkinney
Reviewed-by: rsun3



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12190 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
mdkinney
2011-08-24 06:49:21 +00:00
parent ad9aa87b56
commit 5657b268e7
3 changed files with 178 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
MdeModulePkg/Core/PiSmmCore/Dispatcher.c
View File

@@ -743,13 +743,15 @@ SmmGetDepexSectionAndPreProccess (
drivers to run. Drain the mScheduledQueue and load and start a PE
image for each driver. Search the mDiscoveredList to see if any driver can
be placed on the mScheduledQueue. If no drivers are placed on the
mScheduledQueue exit the function. On exit it is assumed the Bds()
will be called, and when the Bds() exits the Dispatcher will be called
again.
mScheduledQueue exit the function.
@retval EFI_SUCCESS All of the SMM Drivers that could be dispatched
have been run and the SMM Entry Point has been
registered.
@retval EFI_NOT_READY The SMM Driver that registered the SMM Entry Point
was just dispatched.
@retval EFI_NOT_FOUND There are no SMM Drivers available to be dispatched.
@retval EFI_ALREADY_STARTED The SMM Dispatcher is already running
@retval EFI_NOT_FOUND No SMM Drivers were dispatched
@retval EFI_SUCCESS One or more SMM Drivers were dispatched
**/
EFI_STATUS
@@ -758,10 +760,10 @@ SmmDispatcher (
)
{
EFI_STATUS Status;
EFI_STATUS ReturnStatus;
LIST_ENTRY *Link;
EFI_SMM_DRIVER_ENTRY *DriverEntry;
BOOLEAN ReadyToRun;
BOOLEAN PreviousSmmEntryPointRegistered;
if (!gRequestDispatch) {
return EFI_NOT_FOUND;
@@ -776,7 +778,6 @@ SmmDispatcher (
gDispatcherRunning = TRUE;
ReturnStatus = EFI_NOT_FOUND;
do {
//
// Drain the Scheduled Queue
@@ -827,6 +828,11 @@ SmmDispatcher (
sizeof (DriverEntry->ImageHandle)
);
//
// Cache state of SmmEntryPointRegistered before calling entry point
//
PreviousSmmEntryPointRegistered = gSmmCorePrivate->SmmEntryPointRegistered;
//
// For each SMM driver, pass NULL as ImageHandle
//
@@ -842,7 +848,19 @@ SmmDispatcher (
sizeof (DriverEntry->ImageHandle)
);
ReturnStatus = EFI_SUCCESS;
if (!PreviousSmmEntryPointRegistered && gSmmCorePrivate->SmmEntryPointRegistered) {
//
// Return immediately if the SMM Entry Point was registered by the SMM
// Driver that was just dispatched. The SMM IPL will reinvoke the SMM
// Core Dispatcher. This is required so SMM Mode may be enabled as soon
// as all the dependent SMM Drivers for SMM Mode have been dispatched.
// Once the SMM Entry Point has been registered, then SMM Mode will be
// used.
//
gRequestDispatch = TRUE;
gDispatcherRunning = FALSE;
return EFI_NOT_READY;
}
}
//
@@ -886,7 +904,7 @@ SmmDispatcher (
gDispatcherRunning = FALSE;
return ReturnStatus;
return EFI_SUCCESS;
}
/**
@@ -1309,7 +1327,34 @@ SmmDriverDispatchHandler (
// Execute the SMM Dispatcher on any newly discovered FVs and previously
// discovered SMM drivers that have been discovered but not dispatched.
//
return SmmDispatcher ();
Status = SmmDispatcher ();
//
// Check to see if CommBuffer and CommBufferSize are valid
//
if (CommBuffer != NULL && CommBufferSize != NULL) {
if (*CommBufferSize > 0) {
if (Status == EFI_NOT_READY) {
//
// If a the SMM Core Entry Point was just registered, then set flag to
// request the SMM Dispatcher to be restarted.
//
*(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_RESTART;
} else if (!EFI_ERROR (Status)) {
//
// Set the flag to show that the SMM Dispatcher executed without errors
//
*(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_SUCCESS;
} else {
//
// Set the flag to show that the SMM Dispatcher encountered an error
//
*(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_ERROR;
}
}
}
return EFI_SUCCESS;
}
/**