X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=PcAtChipsetPkg%2FPcatRealTimeClockRuntimeDxe%2FPcRtcEntry.c;fp=PcAtChipsetPkg%2FPcatRealTimeClockRuntimeDxe%2FPcRtcEntry.c;h=606b88adafb7ef5d81e32e212794a5ccae9d0443;hp=ccda6331373bfe4069b0a59495b5e5cc731c8fc8;hb=015be4075f6cfef03bc08c0e3eb7286dd80c8e8b;hpb=a7d977040bd82b89d1fe5ef32d488bfd10db2dbc
diff --git a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtcEntry.c b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtcEntry.c
index ccda633137..606b88adaf 100644
--- a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtcEntry.c
+++ b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtcEntry.c
@@ -2,16 +2,23 @@
Provides Set/Get time operations.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.
+Copyright (c) 2018 - 2020, ARM Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
+#include
#include "PcRtc.h"
PC_RTC_MODULE_GLOBALS mModuleGlobal;
EFI_HANDLE mHandle = NULL;
+STATIC EFI_EVENT mVirtualAddrChangeEvent;
+
+UINTN mRtcIndexRegister;
+UINTN mRtcTargetRegister;
+
/**
Returns the current time and date information, and the time-keeping capabilities
of the hardware platform.
@@ -105,6 +112,30 @@ PcRtcEfiSetWakeupTime (
return PcRtcSetWakeupTime (Enabled, Time, &mModuleGlobal);
}
+/**
+ Fixup internal data so that EFI can be called in virtual mode.
+ Call the passed in Child Notify event and convert any pointers in
+ lib to virtual mode.
+
+ @param[in] Event The Event that is being processed
+ @param[in] Context Event Context
+**/
+VOID
+EFIAPI
+LibRtcVirtualNotifyEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ // Only needed if you are going to support the OS calling RTC functions in
+ // virtual mode. You will need to call EfiConvertPointer (). To convert any
+ // stored physical addresses to virtual address. After the OS transitions to
+ // calling in virtual mode, all future runtime calls will be made in virtual
+ // mode.
+ EfiConvertPointer (0x0, (VOID**)&mRtcIndexRegister);
+ EfiConvertPointer (0x0, (VOID**)&mRtcTargetRegister);
+}
+
/**
The user Entry Point for PcRTC module.
@@ -131,6 +162,11 @@ InitializePcRtc (
EfiInitializeLock (&mModuleGlobal.RtcLock, TPL_CALLBACK);
mModuleGlobal.CenturyRtcAddress = GetCenturyRtcAddress ();
+ if (FeaturePcdGet (PcdRtcUseMmio)) {
+ mRtcIndexRegister = (UINTN)PcdGet64 (PcdRtcIndexRegister64);
+ mRtcTargetRegister = (UINTN)PcdGet64 (PcdRtcTargetRegister64);
+ }
+
Status = PcRtcInit (&mModuleGlobal);
ASSERT_EFI_ERROR (Status);
@@ -165,7 +201,23 @@ InitializePcRtc (
NULL,
NULL
);
- ASSERT_EFI_ERROR (Status);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ if (FeaturePcdGet (PcdRtcUseMmio)) {
+ // Register for the virtual address change event
+ Status = gBS->CreateEventEx (
+ EVT_NOTIFY_SIGNAL,
+ TPL_NOTIFY,
+ LibRtcVirtualNotifyEvent,
+ NULL,
+ &gEfiEventVirtualAddressChangeGuid,
+ &mVirtualAddrChangeEvent
+ );
+ ASSERT_EFI_ERROR (Status);
+ }
return Status;
}