diff options
| -rw-r--r-- | ArmVirtPkg/Library/DebugLibFdtPL011Uart/DxeRuntimeDebugLibFdtPL011Uart.inf | 61 | ||||
| -rw-r--r-- | ArmVirtPkg/Library/DebugLibFdtPL011Uart/Runtime.c | 88 |
2 files changed, 149 insertions, 0 deletions
diff --git a/ArmVirtPkg/Library/DebugLibFdtPL011Uart/DxeRuntimeDebugLibFdtPL011Uart.inf b/ArmVirtPkg/Library/DebugLibFdtPL011Uart/DxeRuntimeDebugLibFdtPL011Uart.inf new file mode 100644 index 0000000000..84e9dbae22 --- /dev/null +++ b/ArmVirtPkg/Library/DebugLibFdtPL011Uart/DxeRuntimeDebugLibFdtPL011Uart.inf @@ -0,0 +1,61 @@ +## @file
+# DebugLib instance that produces debug output directly via PL011UartLib.
+#
+# If there are at least two PL011 UARTs in the device tree, and the /chosen
+# node's "stdout-path" property references one PL011 UART, then both raw
+# SerialPortLib IO, and -- via SerialDxe -- UEFI console IO, will occur on that
+# UART; and this DebugLib instance will produce output on a *different* UART.
+#
+# This instance is suitable for DXE_RUNTIME_DRIVER modules. When exiting boot
+# services, UART access is stopped.
+#
+# Copyright (C) Red Hat
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+ INF_VERSION = 1.27
+ BASE_NAME = DxeRuntimeDebugLibFdtPL011Uart
+ FILE_GUID = 8A6E0972-81B5-4FF4-BB24-A07748415947
+ MODULE_TYPE = DXE_RUNTIME_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = DebugLib|DXE_RUNTIME_DRIVER
+ CONSTRUCTOR = DxeRuntimeDebugLibFdtPL011UartConstructor
+ DESTRUCTOR = DxeRuntimeDebugLibFdtPL011UartDestructor
+
+[Sources]
+ DebugLib.c
+ Ram.c
+ Ram.h
+ Runtime.c
+ Write.h
+
+[Packages]
+ ArmPlatformPkg/ArmPlatformPkg.dec
+ ArmVirtPkg/ArmVirtPkg.dec
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ BaseLib
+ BaseMemoryLib
+ DebugPrintErrorLevelLib
+ HobLib # Ram.c
+ PL011UartLib
+ PcdLib
+ PrintLib
+
+[Pcd]
+ gEfiMdePkgTokenSpaceGuid.PcdDebugClearMemoryValue
+ gEfiMdePkgTokenSpaceGuid.PcdDebugPropertyMask
+ gEfiMdePkgTokenSpaceGuid.PcdFixedDebugPrintErrorLevel
+
+[FixedPcd]
+ gArmPlatformTokenSpaceGuid.PL011UartClkInHz
+ gEfiMdePkgTokenSpaceGuid.PcdUartDefaultBaudRate
+ gEfiMdePkgTokenSpaceGuid.PcdUartDefaultDataBits
+ gEfiMdePkgTokenSpaceGuid.PcdUartDefaultParity
+ gEfiMdePkgTokenSpaceGuid.PcdUartDefaultStopBits
+
+[Guids]
+ gEarlyPL011BaseAddressGuid # Ram.c
diff --git a/ArmVirtPkg/Library/DebugLibFdtPL011Uart/Runtime.c b/ArmVirtPkg/Library/DebugLibFdtPL011Uart/Runtime.c new file mode 100644 index 0000000000..de7144739c --- /dev/null +++ b/ArmVirtPkg/Library/DebugLibFdtPL011Uart/Runtime.c @@ -0,0 +1,88 @@ +/** @file
+ Permanently disable the library instance in DXE_RUNTIME_DRIVER modules when
+ exiting boot services.
+
+ Copyright (C) Red Hat
+ Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Uefi/UefiSpec.h>
+
+#include "Ram.h"
+
+STATIC EFI_EVENT mExitBootServicesEvent;
+
+/**
+ Notification function that is triggered when the boot service
+ ExitBootServices() is called.
+
+ @param[in] Event Event whose notification function is being invoked. Here,
+ unused.
+
+ @param[in] Context The pointer to the notification function's context, which
+ is implementation-dependent. Here, unused.
+**/
+STATIC
+VOID
+EFIAPI
+ExitBootServicesNotify (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ mDebugLibFdtPL011UartAddress = 0;
+ mDebugLibFdtPL011UartPermanentStatus = RETURN_ABORTED;
+}
+
+/**
+ Library instance constructor, registering ExitBootServicesNotify().
+
+ @param[in] ImageHandle The firmware-allocated handle for the EFI image.
+
+ @param[in] SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+
+ @return Error codes propagated from CreateEvent(); the
+ registration of ExitBootServicesNotify() failed.
+**/
+EFI_STATUS
+EFIAPI
+DxeRuntimeDebugLibFdtPL011UartConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ return SystemTable->BootServices->CreateEvent (
+ EVT_SIGNAL_EXIT_BOOT_SERVICES,
+ TPL_CALLBACK,
+ ExitBootServicesNotify,
+ NULL /* NotifyContext */,
+ &mExitBootServicesEvent
+ );
+}
+
+/**
+ Library instance destructor, deregistering ExitBootServicesNotify().
+
+ @param[in] ImageHandle The firmware-allocated handle for the EFI image.
+
+ @param[in] SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS Library instance tear-down complete.
+
+ @return Error codes propagated from CloseEvent(); the
+ deregistration of ExitBootServicesNotify() failed.
+**/
+EFI_STATUS
+EFIAPI
+DxeRuntimeDebugLibFdtPL011UartDestructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ return SystemTable->BootServices->CloseEvent (mExitBootServicesEvent);
+}
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