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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/Devices/EFI/Firmware/EmbeddedPkg/EmbeddedMonotonicCounter | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/EmbeddedPkg/EmbeddedMonotonicCounter')
2 files changed, 111 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/EmbeddedPkg/EmbeddedMonotonicCounter/EmbeddedMonotonicCounter.c b/src/VBox/Devices/EFI/Firmware/EmbeddedPkg/EmbeddedMonotonicCounter/EmbeddedMonotonicCounter.c new file mode 100644 index 00000000..cf87f2df --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/EmbeddedPkg/EmbeddedMonotonicCounter/EmbeddedMonotonicCounter.c @@ -0,0 +1,76 @@ +/** @file + + Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> + + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include <Uefi.h> + +#include <Library/BaseLib.h> +#include <Library/DebugLib.h> +#include <Library/UefiBootServicesTableLib.h> +#include <Library/UefiRuntimeServicesTableLib.h> + +#include <Protocol/MonotonicCounter.h> + +UINT64 gCurrentMonotonicCount = 0; + +EFI_STATUS +EFIAPI +GetNextMonotonicCount ( + OUT UINT64 *Count + ) +{ + if (Count == NULL) { + return EFI_INVALID_PARAMETER; + } + + *Count = gCurrentMonotonicCount++; + return EFI_SUCCESS; +} + +EFI_STATUS +EFIAPI +GetNextHighMonotonicCount ( + OUT UINT32 *HighCount + ) +{ + if (HighCount == NULL) { + return EFI_INVALID_PARAMETER; + } + + gCurrentMonotonicCount += 0x0000000100000000ULL; + + *HighCount = (UINT32)RShiftU64 (gCurrentMonotonicCount, 32) & 0xFFFFFFFF; + + return EFI_SUCCESS; +} + + +EFI_STATUS +EFIAPI +MonotonicCounterDriverInitialize ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + EFI_HANDLE Handle = NULL; + + // Make sure the Monotonic Counter Architectural Protocol is not already installed in the system + ASSERT_PROTOCOL_ALREADY_INSTALLED(NULL, &gEfiMonotonicCounterArchProtocolGuid); + + // Fill in the EFI Boot Services and EFI Runtime Services Monotonic Counter Fields + gBS->GetNextMonotonicCount = GetNextMonotonicCount; + gRT->GetNextHighMonotonicCount = GetNextHighMonotonicCount; + + // Install the Monotonic Counter Architectural Protocol onto a new handle + Status = gBS->InstallMultipleProtocolInterfaces ( + &Handle, + &gEfiMonotonicCounterArchProtocolGuid, NULL, + NULL + ); + return Status; +} diff --git a/src/VBox/Devices/EFI/Firmware/EmbeddedPkg/EmbeddedMonotonicCounter/EmbeddedMonotonicCounter.inf b/src/VBox/Devices/EFI/Firmware/EmbeddedPkg/EmbeddedMonotonicCounter/EmbeddedMonotonicCounter.inf new file mode 100644 index 00000000..0ca9a8cb --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/EmbeddedPkg/EmbeddedMonotonicCounter/EmbeddedMonotonicCounter.inf @@ -0,0 +1,35 @@ +#/** @file +# +# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR> +# SPDX-License-Identifier: BSD-2-Clause-Patent +# +#**/ + +[Defines] + INF_VERSION = 0x00010005 + BASE_NAME = EmbeddedMonotonicCounter + FILE_GUID = FCABE6A7-7953-4A84-B7EC-D29E89B62E87 + MODULE_TYPE = DXE_RUNTIME_DRIVER + VERSION_STRING = 1.0 + + ENTRY_POINT = MonotonicCounterDriverInitialize + +[Sources.common] + EmbeddedMonotonicCounter.c + +[Packages] + MdePkg/MdePkg.dec + +[LibraryClasses] + BaseLib + DebugLib + UefiBootServicesTableLib + UefiDriverEntryPoint + UefiRuntimeServicesTableLib + +[Protocols] + gEfiMonotonicCounterArchProtocolGuid + +[Depex] + TRUE + |