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/** @file
Capsule library runtime support.
Copyright (c) 2016 - 2017, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiDxe.h>
#include <Guid/FmpCapsule.h>
#include <Guid/SystemResourceTable.h>
#include <Guid/EventGroup.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/MemoryAllocationLib.h>
extern EFI_SYSTEM_RESOURCE_TABLE *mEsrtTable;
extern BOOLEAN mIsVirtualAddrConverted;
EFI_EVENT mDxeRuntimeCapsuleLibVirtualAddressChangeEvent = NULL;
EFI_EVENT mDxeRuntimeCapsuleLibReadyToBootEvent = NULL;
/**
Convert EsrtTable physical address to virtual address.
@param[in] Event Event whose notification function is being invoked.
@param[in] Context The pointer to the notification function's context, which
is implementation-dependent.
**/
VOID
EFIAPI
DxeCapsuleLibVirtualAddressChangeEvent (
IN EFI_EVENT Event,
IN VOID *Context
)
{
gRT->ConvertPointer (EFI_OPTIONAL_PTR, (VOID **)&mEsrtTable);
mIsVirtualAddrConverted = TRUE;
}
/**
Notify function for event group EFI_EVENT_GROUP_READY_TO_BOOT.
@param[in] Event The Event that is being processed.
@param[in] Context The Event Context.
**/
STATIC
VOID
EFIAPI
DxeCapsuleLibReadyToBootEventNotify (
IN EFI_EVENT Event,
IN VOID *Context
)
{
UINTN Index;
EFI_CONFIGURATION_TABLE *ConfigEntry;
EFI_SYSTEM_RESOURCE_TABLE *EsrtTable;
//
// Get Esrt table first
//
ConfigEntry = gST->ConfigurationTable;
for (Index = 0; Index < gST->NumberOfTableEntries; Index++) {
if (CompareGuid(&gEfiSystemResourceTableGuid, &ConfigEntry->VendorGuid)) {
break;
}
ConfigEntry++;
}
//
// If no Esrt table installed in Configure Table
//
if (Index < gST->NumberOfTableEntries) {
//
// Search Esrt to check given capsule is qualified
//
EsrtTable = (EFI_SYSTEM_RESOURCE_TABLE *) ConfigEntry->VendorTable;
mEsrtTable = AllocateRuntimeCopyPool (
sizeof (EFI_SYSTEM_RESOURCE_TABLE) +
EsrtTable->FwResourceCount * sizeof (EFI_SYSTEM_RESOURCE_ENTRY),
EsrtTable);
ASSERT (mEsrtTable != NULL);
//
// Set FwResourceCountMax to a sane value.
//
mEsrtTable->FwResourceCountMax = mEsrtTable->FwResourceCount;
}
}
/**
The constructor function hook VirtualAddressChange event to use ESRT table as capsule routing table.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The constructor successfully .
**/
EFI_STATUS
EFIAPI
DxeRuntimeCapsuleLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Make sure we can handle virtual address changes.
//
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
DxeCapsuleLibVirtualAddressChangeEvent,
NULL,
&gEfiEventVirtualAddressChangeGuid,
&mDxeRuntimeCapsuleLibVirtualAddressChangeEvent
);
ASSERT_EFI_ERROR (Status);
//
// Register notify function to cache the FMP capsule GUIDs at ReadyToBoot.
//
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
DxeCapsuleLibReadyToBootEventNotify,
NULL,
&gEfiEventReadyToBootGuid,
&mDxeRuntimeCapsuleLibReadyToBootEvent
);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
/**
The destructor function closes the VirtualAddressChange event.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The destructor completed successfully.
**/
EFI_STATUS
EFIAPI
DxeRuntimeCapsuleLibDestructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Close the VirtualAddressChange event.
//
Status = gBS->CloseEvent (mDxeRuntimeCapsuleLibVirtualAddressChangeEvent);
ASSERT_EFI_ERROR (Status);
//
// Close the ReadyToBoot event.
//
Status = gBS->CloseEvent (mDxeRuntimeCapsuleLibReadyToBootEvent);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
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