From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
To: edk2-devel@lists.sourceforge.net, lersek@redhat.com,
olivier.martin@arm.com, roy.franz@linaro.org,
leif.lindholm@linaro.org, stefano.stabellini@eu.citrix.com,
ian.campbell@citrix.com, anthony.perard@citrix.com,
christoffer.dall@linaro.org, xen-devel@lists.xen.org,
ilias.biris@linaro.org
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Subject: [PATCH v1 18/21] Ovmf/Xen: implement dummy RealTimeClockLib for Xen
Date: Fri, 23 Jan 2015 15:03:07 +0000 [thread overview]
Message-ID: <1422025390-8036-19-git-send-email-ard.biesheuvel__25257.7126994312$1422025557$gmane$org@linaro.org> (raw)
In-Reply-To: <1422025390-8036-1-git-send-email-ard.biesheuvel@linaro.org>
This implements a dummy RealTimeClockLib for Xen, as there is no
guest interface to access the time kept by Xen that can be shared
between UEFI and the OS.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
.../XenRealTimeClockLib/XenRealTimeClockLib.c | 196 +++++++++++++++++++++
.../XenRealTimeClockLib/XenRealTimeClockLib.inf | 38 ++++
2 files changed, 234 insertions(+)
create mode 100644 OvmfPkg/Library/XenRealTimeClockLib/XenRealTimeClockLib.c
create mode 100644 OvmfPkg/Library/XenRealTimeClockLib/XenRealTimeClockLib.inf
diff --git a/OvmfPkg/Library/XenRealTimeClockLib/XenRealTimeClockLib.c b/OvmfPkg/Library/XenRealTimeClockLib/XenRealTimeClockLib.c
new file mode 100644
index 000000000000..70204ac22a92
--- /dev/null
+++ b/OvmfPkg/Library/XenRealTimeClockLib/XenRealTimeClockLib.c
@@ -0,0 +1,196 @@
+/** @file
+ Implement EFI RealTimeClock runtime services via Xen shared info page
+
+ Copyright (c) 2015, Linaro Ltd. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Uefi.h>
+#include <PiDxe.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+
+/**
+ Converts Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC) to EFI_TIME
+ **/
+STATIC
+VOID
+EpochToEfiTime (
+ IN UINTN EpochSeconds,
+ OUT EFI_TIME *Time
+ )
+{
+ UINTN a;
+ UINTN b;
+ UINTN c;
+ UINTN d;
+ UINTN g;
+ UINTN j;
+ UINTN m;
+ UINTN y;
+ UINTN da;
+ UINTN db;
+ UINTN dc;
+ UINTN dg;
+ UINTN hh;
+ UINTN mm;
+ UINTN ss;
+ UINTN J;
+
+ J = (EpochSeconds / 86400) + 2440588;
+ j = J + 32044;
+ g = j / 146097;
+ dg = j % 146097;
+ c = (((dg / 36524) + 1) * 3) / 4;
+ dc = dg - (c * 36524);
+ b = dc / 1461;
+ db = dc % 1461;
+ a = (((db / 365) + 1) * 3) / 4;
+ da = db - (a * 365);
+ y = (g * 400) + (c * 100) + (b * 4) + a;
+ m = (((da * 5) + 308) / 153) - 2;
+ d = da - (((m + 4) * 153) / 5) + 122;
+
+ Time->Year = y - 4800 + ((m + 2) / 12);
+ Time->Month = ((m + 2) % 12) + 1;
+ Time->Day = d + 1;
+
+ ss = EpochSeconds % 60;
+ a = (EpochSeconds - ss) / 60;
+ mm = a % 60;
+ b = (a - mm) / 60;
+ hh = b % 24;
+
+ Time->Hour = hh;
+ Time->Minute = mm;
+ Time->Second = ss;
+ Time->Nanosecond = 0;
+
+}
+
+/**
+ Returns the current time and date information, and the time-keeping capabilities
+ of the hardware platform.
+
+ @param Time A pointer to storage to receive a snapshot of the current time.
+ @param Capabilities An optional pointer to a buffer to receive the real time clock
+ device's capabilities.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval EFI_INVALID_PARAMETER Time is NULL.
+ @retval EFI_DEVICE_ERROR The time could not be retrieved due to hardware error.
+
+**/
+EFI_STATUS
+EFIAPI
+LibGetTime (
+ OUT EFI_TIME *Time,
+ OUT EFI_TIME_CAPABILITIES *Capabilities
+ )
+{
+ ASSERT (Time != NULL);
+
+ //
+ // For now, there is nothing that we can do besides returning a bogus time,
+ // as Xen's timekeeping uses a shared info page which cannot be shared
+ // between UEFI and the OS
+ //
+ EpochToEfiTime(1421770011, Time);
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Sets the current local time and date information.
+
+ @param Time A pointer to the current time.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval EFI_INVALID_PARAMETER A time field is out of range.
+ @retval EFI_DEVICE_ERROR The time could not be set due due to hardware error.
+
+**/
+EFI_STATUS
+EFIAPI
+LibSetTime (
+ IN EFI_TIME *Time
+ )
+{
+ return EFI_DEVICE_ERROR;
+}
+
+
+/**
+ Returns the current wakeup alarm clock setting.
+
+ @param Enabled Indicates if the alarm is currently enabled or disabled.
+ @param Pending Indicates if the alarm signal is pending and requires acknowledgement.
+ @param Time The current alarm setting.
+
+ @retval EFI_SUCCESS The alarm settings were returned.
+ @retval EFI_INVALID_PARAMETER Any parameter is NULL.
+ @retval EFI_DEVICE_ERROR The wakeup time could not be retrieved due to a hardware error.
+ @retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.
+
+**/
+EFI_STATUS
+EFIAPI
+LibGetWakeupTime (
+ OUT BOOLEAN *Enabled,
+ OUT BOOLEAN *Pending,
+ OUT EFI_TIME *Time
+ )
+{
+ return EFI_UNSUPPORTED;
+}
+
+/**
+ Sets the system wakeup alarm clock time.
+
+ @param Enabled Enable or disable the wakeup alarm.
+ @param Time If Enable is TRUE, the time to set the wakeup alarm for.
+
+ @retval EFI_SUCCESS If Enable is TRUE, then the wakeup alarm was enabled. If
+ Enable is FALSE, then the wakeup alarm was disabled.
+ @retval EFI_INVALID_PARAMETER A time field is out of range.
+ @retval EFI_DEVICE_ERROR The wakeup time could not be set due to a hardware error.
+ @retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.
+
+**/
+EFI_STATUS
+EFIAPI
+LibSetWakeupTime (
+ IN BOOLEAN Enabled,
+ OUT EFI_TIME *Time
+ )
+{
+ return EFI_UNSUPPORTED;
+}
+
+/**
+ This is the declaration of an EFI image entry point. This can be the entry point to an application
+ written to this specification, an EFI boot service driver, or an EFI runtime driver.
+
+ @param ImageHandle Handle that identifies the loaded image.
+ @param SystemTable System Table for this image.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+
+**/
+EFI_STATUS
+EFIAPI
+LibRtcInitialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ return EFI_SUCCESS;
+}
diff --git a/OvmfPkg/Library/XenRealTimeClockLib/XenRealTimeClockLib.inf b/OvmfPkg/Library/XenRealTimeClockLib/XenRealTimeClockLib.inf
new file mode 100644
index 000000000000..aafbfda6b491
--- /dev/null
+++ b/OvmfPkg/Library/XenRealTimeClockLib/XenRealTimeClockLib.inf
@@ -0,0 +1,38 @@
+#/** @file
+#
+# Copyright (c) 2015, L Ltd. All rights reserved.<BR>
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = XenRealTimeClockLib
+ FILE_GUID = EC2557E8-7005-430B-9F6F-9BA109698248
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = RealTimeClockLib|DXE_CORE DXE_DRIVER UEFI_DRIVER DXE_RUNTIME_DRIVER UEFI_APPLICATION
+
+[Sources.common]
+ XenRealTimeClockLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+
+[LibraryClasses]
+ UefiLib
+ DebugLib
+ DxeServicesTableLib
+ UefiRuntimeLib
+
+[Guids]
+ gEfiEventVirtualAddressChangeGuid
--
1.8.3.2
next prev parent reply other threads:[~2015-01-23 15:03 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1422025390-8036-1-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 15:02 ` [PATCH v1 01/21] ArmPkg: allow HYP timer interrupt to be omitted Ard Biesheuvel
2015-01-23 15:02 ` [PATCH v1 02/21] ArmVirtualizationPkg: add GICv3 detection to VirtFdtDxe Ard Biesheuvel
2015-01-23 15:02 ` [PATCH v1 03/21] ArmVirtualizationPkg: replace instance of FixedPcdGet() Ard Biesheuvel
2015-01-23 15:02 ` [PATCH v1 04/21] ArmVirtualizationPkg: move early UART discovery to PlatformPeim Ard Biesheuvel
2015-01-23 15:02 ` [PATCH v1 05/21] ArmVirtualizationPkg: use a HOB to store device tree blob Ard Biesheuvel
2015-01-23 15:02 ` [PATCH v1 06/21] ArmVirtualizationPkg: add padding to FDT allocation Ard Biesheuvel
2015-01-23 15:02 ` [PATCH v1 07/21] ArmPlatformPkg/PrePi: factor out FixedPcdGetXX() and ArmIsMpCore() Ard Biesheuvel
2015-01-23 15:02 ` [PATCH v1 08/21] ArmPlatformPkg/PrePi: add a relocatable version of PrePi Ard Biesheuvel
2015-01-23 15:02 ` [PATCH v1 09/21] ArmVirtualizationPkg: implement custom MemoryInitPeiLib Ard Biesheuvel
2015-01-23 15:02 ` [PATCH v1 10/21] ArmVirtualizationPkg: Xen/PV relocatable platformlib instance Ard Biesheuvel
2015-01-23 15:03 ` [PATCH v1 11/21] Ovmf/Xen: move Xen interface version to <xen.h> Ard Biesheuvel
2015-01-23 15:03 ` [PATCH v1 12/21] Ovmf/Xen: fix pointer to int cast in XenBusDxe Ard Biesheuvel
2015-01-23 15:03 ` [PATCH v1 13/21] Ovmf/Xen: move arch specific hypercall implementation to XenHypercallLib Ard Biesheuvel
2015-01-23 15:03 ` [PATCH v1 14/21] Ovmf/Xen: allow non-PCI usage of XenBusDxe Ard Biesheuvel
2015-01-23 15:03 ` [PATCH v1 15/21] Ovmf/Xen: implement XenHypercallLib for ARM Ard Biesheuvel
2015-01-23 15:03 ` [PATCH v1 16/21] Ovmf/Xen: add ARM and AArch64 support to XenBusDxe Ard Biesheuvel
2015-01-23 15:03 ` [PATCH v1 17/21] Ovmf/Xen: add Xen PV console SerialPortLib driver Ard Biesheuvel
2015-01-23 15:03 ` Ard Biesheuvel [this message]
2015-01-23 15:03 ` [PATCH v1 19/21] Ovfm/Xen: add a Vendor Hardware device path GUID for the XenBus root Ard Biesheuvel
2015-01-23 15:03 ` [PATCH v1 20/21] ArmVirtualizationPkg/VirtFdtDxe: wire up XenBusDxe to "xen, xen" DT node Ard Biesheuvel
2015-01-23 15:03 ` [PATCH v1 21/21] ArmVirtualizationPkg: add platform description for Xen guests Ard Biesheuvel
[not found] ` <1422025390-8036-14-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 18:24 ` [PATCH v1 13/21] Ovmf/Xen: move arch specific hypercall implementation to XenHypercallLib Stefano Stabellini
2015-01-24 0:02 ` Laszlo Ersek
[not found] ` <1422025390-8036-16-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 18:41 ` [PATCH v1 15/21] Ovmf/Xen: implement XenHypercallLib for ARM Stefano Stabellini
2015-01-23 19:00 ` Ard Biesheuvel
[not found] ` <1422025390-8036-18-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 18:54 ` [PATCH v1 17/21] Ovmf/Xen: add Xen PV console SerialPortLib driver Stefano Stabellini
2015-01-23 19:19 ` Ard Biesheuvel
[not found] ` <CAKv+Gu8fE6xirv0U-T_e0SrQx_x0-STMo-rfUedO=xsnSa+X2A@mail.gmail.com>
2015-01-26 11:22 ` Stefano Stabellini
[not found] ` <1422025390-8036-21-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 19:03 ` [PATCH v1 20/21] ArmVirtualizationPkg/VirtFdtDxe: wire up XenBusDxe to "xen, xen" DT node Stefano Stabellini
2015-01-23 19:22 ` Ard Biesheuvel
2015-01-23 19:08 ` [PATCH v1 00/21] Xen/ARM guest support Laszlo Ersek
[not found] ` <1422025390-8036-2-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 16:41 ` [PATCH v1 01/21] ArmPkg: allow HYP timer interrupt to be omitted Olivier Martin
2015-01-23 19:17 ` Laszlo Ersek
[not found] ` <1422025390-8036-3-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 16:41 ` [PATCH v1 02/21] ArmVirtualizationPkg: add GICv3 detection to VirtFdtDxe Olivier Martin
2015-01-23 19:20 ` Laszlo Ersek
[not found] ` <1422025390-8036-4-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 16:59 ` [PATCH v1 03/21] ArmVirtualizationPkg: replace instance of FixedPcdGet() Olivier Martin
2015-01-23 19:38 ` Laszlo Ersek
[not found] ` <54C2A34B.8010507@redhat.com>
2015-01-26 10:57 ` Ard Biesheuvel
[not found] ` <CAKv+Gu_qDfxACEqoxbW2h84R4kd2Eng8oNo6J4sU=5OuH=ELEA@mail.gmail.com>
2015-01-26 11:11 ` Laszlo Ersek
[not found] ` <1422025390-8036-10-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 20:59 ` [PATCH v1 09/21] ArmVirtualizationPkg: implement custom MemoryInitPeiLib Laszlo Ersek
[not found] ` <54C2B619.7060800@redhat.com>
2015-01-26 11:35 ` Ard Biesheuvel
[not found] ` <1422025390-8036-11-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 21:09 ` [PATCH v1 10/21] ArmVirtualizationPkg: Xen/PV relocatable platformlib instance Laszlo Ersek
[not found] ` <1422025390-8036-12-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 18:07 ` [PATCH v1 11/21] Ovmf/Xen: move Xen interface version to <xen.h> Stefano Stabellini
2015-01-23 23:54 ` Laszlo Ersek
[not found] ` <1422025390-8036-13-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 18:14 ` [PATCH v1 12/21] Ovmf/Xen: fix pointer to int cast in XenBusDxe Stefano Stabellini
2015-01-24 0:00 ` Laszlo Ersek
[not found] ` <1422025390-8036-15-git-send-email-ard.biesheuvel@linaro.org>
2015-01-26 9:27 ` [PATCH v1 14/21] Ovmf/Xen: allow non-PCI usage of XenBusDxe Laszlo Ersek
[not found] ` <54C60883.8030706@redhat.com>
2015-01-26 9:46 ` Ard Biesheuvel
[not found] ` <CAKv+Gu9qdLjngX9j6wppT+sucCEhwDW4Cnfez2QJC5p+FAm4uw@mail.gmail.com>
2015-01-26 10:28 ` Laszlo Ersek
[not found] ` <54C616D7.2030407@redhat.com>
2015-01-26 13:52 ` Ard Biesheuvel
[not found] ` <CAKv+Gu_6zrybkQ_zFghuh8s7odSeC=swLvbx41ukd9LJdx0x8w@mail.gmail.com>
2015-01-26 14:10 ` Laszlo Ersek
[not found] ` <54C64AED.8030800@redhat.com>
2015-01-26 14:19 ` Ard Biesheuvel
[not found] ` <1422025390-8036-5-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 19:44 ` [PATCH v1 04/21] ArmVirtualizationPkg: move early UART discovery to PlatformPeim Laszlo Ersek
2015-01-26 10:54 ` Olivier Martin
[not found] ` <1422025390-8036-6-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 20:22 ` [PATCH v1 05/21] ArmVirtualizationPkg: use a HOB to store device tree blob Laszlo Ersek
2015-01-26 11:08 ` Olivier Martin
[not found] ` <1422025390-8036-7-git-send-email-ard.biesheuvel@linaro.org>
2015-01-23 23:52 ` [PATCH v1 06/21] ArmVirtualizationPkg: add padding to FDT allocation Laszlo Ersek
2015-01-26 11:47 ` Olivier Martin
[not found] ` <54c6294f.8638e50a.7237.ffffa2f5SMTPIN_ADDED_BROKEN@mx.google.com>
2015-01-26 11:48 ` Ard Biesheuvel
[not found] ` <CAKv+Gu9ZDwbZ+O+JPAm44_FbjEYXcTK+yn5=7U4Cn88niLqJOA@mail.gmail.com>
2015-01-26 11:51 ` Olivier Martin
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