From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from SMTP.CITRIX.COM (smtp.citrix.com [66.165.176.89]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 27C0681F5B for ; Thu, 8 Dec 2016 07:53:28 -0800 (PST) X-IronPort-AV: E=Sophos;i="5.33,320,1477958400"; d="scan'208";a="393762216" From: Anthony PERARD To: , CC: Anthony PERARD Date: Thu, 8 Dec 2016 15:33:37 +0000 Message-ID: <20161208153340.2285-12-anthony.perard@citrix.com> X-Mailer: git-send-email 2.10.2 In-Reply-To: <20161208153340.2285-1-anthony.perard@citrix.com> References: <20161208153340.2285-1-anthony.perard@citrix.com> MIME-Version: 1.0 Subject: [PATCH RFC 11/14] OvmfPkg/XenOvmf: Adding XenTimerLocalApic X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Dec 2016 15:53:28 -0000 Content-Type: text/plain And replacing the ACPI Timer by this one based on the local APIC. ACPI Timer does not work in a PVH guest, but local APIC works on both PVH and HVM. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Anthony PERARD --- OvmfPkg/XenOvmf.dsc | 18 +- OvmfPkg/XenOvmf.fdf | 2 +- OvmfPkg/XenTimerLocalApic/Timer.h | 191 ++++++++++++ OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.c | 386 ++++++++++++++++++++++++ OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.inf | 51 ++++ 5 files changed, 640 insertions(+), 8 deletions(-) create mode 100644 OvmfPkg/XenTimerLocalApic/Timer.h create mode 100644 OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.c create mode 100644 OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.inf diff --git a/OvmfPkg/XenOvmf.dsc b/OvmfPkg/XenOvmf.dsc index ef32c33..31a2185 100644 --- a/OvmfPkg/XenOvmf.dsc +++ b/OvmfPkg/XenOvmf.dsc @@ -81,7 +81,7 @@ ################################################################################ [LibraryClasses] PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf - TimerLib|OvmfPkg/Library/AcpiTimerLib/BaseAcpiTimerLib.inf + TimerLib|MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf PrintLib|MdePkg/Library/BasePrintLib/BasePrintLib.inf BaseMemoryLib|MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf BaseLib|MdePkg/Library/BaseLib/BaseLib.inf @@ -175,7 +175,7 @@ !endif [LibraryClasses.common.SEC] - TimerLib|OvmfPkg/Library/AcpiTimerLib/BaseRomAcpiTimerLib.inf + TimerLib|MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf QemuFwCfgLib|OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgSecLib.inf !ifdef $(DEBUG_ON_SERIAL_PORT) DebugLib|MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort.inf @@ -251,7 +251,7 @@ [LibraryClasses.common.DXE_RUNTIME_DRIVER] PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf - TimerLib|OvmfPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf + TimerLib|MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf HobLib|MdePkg/Library/DxeHobLib/DxeHobLib.inf DxeCoreEntryPoint|MdePkg/Library/DxeCoreEntryPoint/DxeCoreEntryPoint.inf MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf @@ -269,7 +269,7 @@ [LibraryClasses.common.UEFI_DRIVER] PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf - TimerLib|OvmfPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf + TimerLib|MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf HobLib|MdePkg/Library/DxeHobLib/DxeHobLib.inf DxeCoreEntryPoint|MdePkg/Library/DxeCoreEntryPoint/DxeCoreEntryPoint.inf MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf @@ -284,7 +284,7 @@ [LibraryClasses.common.DXE_DRIVER] PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf - TimerLib|OvmfPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf + TimerLib|MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf HobLib|MdePkg/Library/DxeHobLib/DxeHobLib.inf MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf ReportStatusCodeLib|MdeModulePkg/Library/DxeReportStatusCodeLib/DxeReportStatusCodeLib.inf @@ -314,7 +314,7 @@ [LibraryClasses.common.UEFI_APPLICATION] PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf - TimerLib|OvmfPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf + TimerLib|MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf HobLib|MdePkg/Library/DxeHobLib/DxeHobLib.inf MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf ReportStatusCodeLib|MdeModulePkg/Library/DxeReportStatusCodeLib/DxeReportStatusCodeLib.inf @@ -546,7 +546,11 @@ !endif MdeModulePkg/Universal/EbcDxe/EbcDxe.inf - PcAtChipsetPkg/8259InterruptControllerDxe/8259.inf + OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.inf + #{ + # + #LocalApicLib|UefiCpuPkg/Library/BaseXApicX2ApicLib/BaseXApicX2ApicLib.inf + #} UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf UefiCpuPkg/CpuDxe/CpuDxe.inf PcAtChipsetPkg/8254TimerDxe/8254Timer.inf diff --git a/OvmfPkg/XenOvmf.fdf b/OvmfPkg/XenOvmf.fdf index c211f61..f6876d7 100644 --- a/OvmfPkg/XenOvmf.fdf +++ b/OvmfPkg/XenOvmf.fdf @@ -207,7 +207,7 @@ INF MdeModulePkg/Universal/PCD/Dxe/Pcd.inf INF MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf INF MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf INF MdeModulePkg/Universal/EbcDxe/EbcDxe.inf -INF PcAtChipsetPkg/8259InterruptControllerDxe/8259.inf +INF OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.inf INF UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf INF UefiCpuPkg/CpuDxe/CpuDxe.inf INF PcAtChipsetPkg/8254TimerDxe/8254Timer.inf diff --git a/OvmfPkg/XenTimerLocalApic/Timer.h b/OvmfPkg/XenTimerLocalApic/Timer.h new file mode 100644 index 0000000..8d6f37c --- /dev/null +++ b/OvmfPkg/XenTimerLocalApic/Timer.h @@ -0,0 +1,191 @@ +/** @file + Private data structures + +Copyright (c) 2005 - 2016, Intel Corporation. All rights reserved.
+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. +**/ + +#ifndef _TIMER_H_ +#define _TIMER_H_ + +#include + +#include +#include +#include + +#include +#include +#include +#include + +// +// The PCAT 8253/8254 has an input clock at 1.193182 MHz and Timer 0 is +// initialized as a 16 bit free running counter that generates an interrupt(IRQ0) +// each time the counter rolls over. +// +// 65536 counts +// ---------------- * 1,000,000 uS/S = 54925.4 uS = 549254 * 100 ns +// 1,193,182 Hz +// + +// +// The maximum tick duration for 8254 timer +// +#define MAX_TIMER_TICK_DURATION 549254 +// +// The default timer tick duration is set to 10 ms = 100000 100 ns units +// +#define DEFAULT_TIMER_TICK_DURATION 100000 +#define TIMER_CONTROL_PORT 0x43 +#define TIMER0_COUNT_PORT 0x40 + +// +// Function Prototypes +// +/** + Initialize the Timer Architectural Protocol driver + + @param ImageHandle ImageHandle of the loaded driver + @param SystemTable Pointer to the System Table + + @retval EFI_SUCCESS Timer Architectural Protocol created + @retval EFI_OUT_OF_RESOURCES Not enough resources available to initialize driver. + @retval EFI_DEVICE_ERROR A device error occured attempting to initialize the driver. + +**/ +EFI_STATUS +EFIAPI +TimerDriverInitialize ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +; + +/** + + This function adjusts the period of timer interrupts to the value specified + by TimerPeriod. If the timer period is updated, then the selected timer + period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is returned. + If an error occurs while attempting to update the timer period, then the + timer hardware will be put back in its state prior to this call, and + EFI_DEVICE_ERROR is returned. If TimerPeriod is 0, then the timer interrupt + is disabled. This is not the same as disabling the CPU's interrupts. + Instead, it must either turn off the timer hardware, or it must adjust the + interrupt controller so that a CPU interrupt is not generated when the timer + interrupt fires. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param NotifyFunction The rate to program the timer interrupt in 100 nS units. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is + returned. If the timer is programmable, then the timer period + will be rounded up to the nearest timer period that is supported + by the timer hardware. If TimerPeriod is set to 0, then the + timer interrupts will be disabled. + + @retval EFI_SUCCESS The timer period was changed. + @retval EFI_UNSUPPORTED The platform cannot change the period of the timer interrupt. + @retval EFI_DEVICE_ERROR The timer period could not be changed due to a device error. + +**/ +EFI_STATUS +EFIAPI +TimerDriverRegisterHandler ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + IN EFI_TIMER_NOTIFY NotifyFunction + ) +; + +/** + + This function adjusts the period of timer interrupts to the value specified + by TimerPeriod. If the timer period is updated, then the selected timer + period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is returned. + If an error occurs while attempting to update the timer period, then the + timer hardware will be put back in its state prior to this call, and + EFI_DEVICE_ERROR is returned. If TimerPeriod is 0, then the timer interrupt + is disabled. This is not the same as disabling the CPU's interrupts. + Instead, it must either turn off the timer hardware, or it must adjust the + interrupt controller so that a CPU interrupt is not generated when the timer + interrupt fires. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param TimerPeriod The rate to program the timer interrupt in 100 nS units. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is + returned. If the timer is programmable, then the timer period + will be rounded up to the nearest timer period that is supported + by the timer hardware. If TimerPeriod is set to 0, then the + timer interrupts will be disabled. + + @retval EFI_SUCCESS The timer period was changed. + @retval EFI_UNSUPPORTED The platform cannot change the period of the timer interrupt. + @retval EFI_DEVICE_ERROR The timer period could not be changed due to a device error. + +**/ +EFI_STATUS +EFIAPI +TimerDriverSetTimerPeriod ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + IN UINT64 TimerPeriod + ) +; + +/** + + This function retrieves the period of timer interrupts in 100 ns units, + returns that value in TimerPeriod, and returns EFI_SUCCESS. If TimerPeriod + is NULL, then EFI_INVALID_PARAMETER is returned. If a TimerPeriod of 0 is + returned, then the timer is currently disabled. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param TimerPeriod A pointer to the timer period to retrieve in 100 ns units. If + 0 is returned, then the timer is currently disabled. + + @retval EFI_SUCCESS The timer period was returned in TimerPeriod. + @retval EFI_INVALID_PARAMETER TimerPeriod is NULL. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGetTimerPeriod ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + OUT UINT64 *TimerPeriod + ) +; + +/** + + This function generates a soft timer interrupt. If the platform does not support soft + timer interrupts, then EFI_UNSUPPORTED is returned. Otherwise, EFI_SUCCESS is returned. + If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.RegisterHandler() + service, then a soft timer interrupt will be generated. If the timer interrupt is + enabled when this service is called, then the registered handler will be invoked. The + registered handler should not be able to distinguish a hardware-generated timer + interrupt from a software-generated timer interrupt. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + + @retval EFI_SUCCESS The soft timer interrupt was generated. + @retval EFI_UNSUPPORTED The platform does not support the generation of soft timer interrupts. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGenerateSoftInterrupt ( + IN EFI_TIMER_ARCH_PROTOCOL *This + ) +; + +#endif diff --git a/OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.c b/OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.c new file mode 100644 index 0000000..7f3a8f0 --- /dev/null +++ b/OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.c @@ -0,0 +1,386 @@ +/** @file + Timer Architectural Protocol as defined in the DXE CIS + +Copyright (c) 2005 - 2016, Intel Corporation. All rights reserved.
+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 +#include +#include +#include "Timer.h" + +// +// The handle onto which the Timer Architectural Protocol will be installed +// +EFI_HANDLE mTimerHandle = NULL; + +// +// The Timer Architectural Protocol that this driver produces +// +EFI_TIMER_ARCH_PROTOCOL mTimer = { + TimerDriverRegisterHandler, + TimerDriverSetTimerPeriod, + TimerDriverGetTimerPeriod, + TimerDriverGenerateSoftInterrupt +}; + +// +// Pointer to the CPU Architectural Protocol instance +// +EFI_CPU_ARCH_PROTOCOL *mCpu; + +// +// The notification function to call on every timer interrupt. +// A bug in the compiler prevents us from initializing this here. +// +EFI_TIMER_NOTIFY mTimerNotifyFunction; + +// +// The current period of the timer interrupt +// +volatile UINT64 mTimerPeriod = 0; + +// +// Worker Functions +// +/** + 8254 Timer #0 Interrupt Handler. + + @param InterruptType The type of interrupt that occured + @param SystemContext A pointer to the system context when the interrupt occured +**/ +VOID +EFIAPI +TimerInterruptHandler ( + IN EFI_EXCEPTION_TYPE InterruptType, + IN EFI_SYSTEM_CONTEXT SystemContext + ) +{ + EFI_TPL OriginalTPL; + + OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL); + + /* mLegacy8259->EndOfInterrupt (mLegacy8259, Efi8259Irq0); */ + + if (mTimerNotifyFunction != NULL) { + // + // @bug : This does not handle missed timer interrupts + // + mTimerNotifyFunction (mTimerPeriod); + } + SendApicEoi(); + + gBS->RestoreTPL (OriginalTPL); +} + +/** + + This function registers the handler NotifyFunction so it is called every time + the timer interrupt fires. It also passes the amount of time since the last + handler call to the NotifyFunction. If NotifyFunction is NULL, then the + handler is unregistered. If the handler is registered, then EFI_SUCCESS is + returned. If the CPU does not support registering a timer interrupt handler, + then EFI_UNSUPPORTED is returned. If an attempt is made to register a handler + when a handler is already registered, then EFI_ALREADY_STARTED is returned. + If an attempt is made to unregister a handler when a handler is not registered, + then EFI_INVALID_PARAMETER is returned. If an error occurs attempting to + register the NotifyFunction with the timer interrupt, then EFI_DEVICE_ERROR + is returned. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param NotifyFunction The function to call when a timer interrupt fires. This + function executes at TPL_HIGH_LEVEL. The DXE Core will + register a handler for the timer interrupt, so it can know + how much time has passed. This information is used to + signal timer based events. NULL will unregister the handler. + + @retval EFI_SUCCESS The timer handler was registered. + @retval EFI_UNSUPPORTED The platform does not support timer interrupts. + @retval EFI_ALREADY_STARTED NotifyFunction is not NULL, and a handler is already + registered. + @retval EFI_INVALID_PARAMETER NotifyFunction is NULL, and a handler was not + previously registered. + @retval EFI_DEVICE_ERROR The timer handler could not be registered. + +**/ +EFI_STATUS +EFIAPI +TimerDriverRegisterHandler ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + IN EFI_TIMER_NOTIFY NotifyFunction + ) +{ + // + // Check for invalid parameters + // + DEBUG((EFI_D_ERROR, "%a %d\n", __FUNCTION__, __LINE__)); + if (NotifyFunction == NULL && mTimerNotifyFunction == NULL) { + return EFI_INVALID_PARAMETER; + } + + if (NotifyFunction != NULL && mTimerNotifyFunction != NULL) { + return EFI_ALREADY_STARTED; + } + DEBUG((EFI_D_ERROR, "%a %d\n", __FUNCTION__, __LINE__)); + + mTimerNotifyFunction = NotifyFunction; + + return EFI_SUCCESS; +} + +/** + + This function adjusts the period of timer interrupts to the value specified + by TimerPeriod. If the timer period is updated, then the selected timer + period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is returned. + If an error occurs while attempting to update the timer period, then the + timer hardware will be put back in its state prior to this call, and + EFI_DEVICE_ERROR is returned. If TimerPeriod is 0, then the timer interrupt + is disabled. This is not the same as disabling the CPU's interrupts. + Instead, it must either turn off the timer hardware, or it must adjust the + interrupt controller so that a CPU interrupt is not generated when the timer + interrupt fires. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param TimerPeriod The rate to program the timer interrupt in 100 nS units. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is + returned. If the timer is programmable, then the timer period + will be rounded up to the nearest timer period that is supported + by the timer hardware. If TimerPeriod is set to 0, then the + timer interrupts will be disabled. + + @retval EFI_SUCCESS The timer period was changed. + @retval EFI_UNSUPPORTED The platform cannot change the period of the timer interrupt. + @retval EFI_DEVICE_ERROR The timer period could not be changed due to a device error. + +**/ +EFI_STATUS +EFIAPI +TimerDriverSetTimerPeriod ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + IN UINT64 TimerPeriod + ) +{ + UINT64 TimerCount; + UINT32 TimerFrequency; + UINTN DivideValue; + + GetApicTimerState(&DivideValue, NULL, NULL); + + // XXX rework comment, copy from other lib + // + // The basic clock is 1.19318 MHz or 0.119318 ticks per 100 ns. + // TimerPeriod * 0.119318 = 8254 timer divisor. Using integer arithmetic + // TimerCount = (TimerPeriod * 119318)/1000000. + // + // Round up to next highest integer. This guarantees that the timer is + // equal to or slightly longer than the requested time. + // TimerCount = ((TimerPeriod * 119318) + 500000)/1000000 + // + // Note that a TimerCount of 0 is equivalent to a count of 65,536 + // + if (TimerPeriod == 0) { + // + // Disable timer interrupt for a TimerPeriod of 0 + // + DisableApicTimerInterrupt(); + } else { + TimerFrequency = PcdGet32(PcdFSBClock) / DivideValue; + + DEBUG((EFI_D_ERROR, "%a %d, fsbclock %d, freq %d\n", + __FUNCTION__, __LINE__, + PcdGet32(PcdFSBClock), + TimerFrequency)); + + // + // Convert TimerPeriod into local apic counts + // + + TimerCount = DivU64x32 (MultU64x32 (TimerFrequency, + (UINT32) TimerPeriod) + 500000, + 1000000); + + DEBUG((EFI_D_ERROR, "%a %d, new init val: %d\n", __FUNCTION__, __LINE__, TimerCount)); + + // + // Program the timer with the new count value + // + WriteLocalApicReg (XAPIC_TIMER_INIT_COUNT_OFFSET, TimerCount); + + // + // Enable timer interrupt + // + EnableApicTimerInterrupt(); + } + // + // Save the new timer period + // + mTimerPeriod = TimerPeriod; + + return EFI_SUCCESS; +} + +/** + + This function retrieves the period of timer interrupts in 100 ns units, + returns that value in TimerPeriod, and returns EFI_SUCCESS. If TimerPeriod + is NULL, then EFI_INVALID_PARAMETER is returned. If a TimerPeriod of 0 is + returned, then the timer is currently disabled. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param TimerPeriod A pointer to the timer period to retrieve in 100 ns units. If + 0 is returned, then the timer is currently disabled. + + @retval EFI_SUCCESS The timer period was returned in TimerPeriod. + @retval EFI_INVALID_PARAMETER TimerPeriod is NULL. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGetTimerPeriod ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + OUT UINT64 *TimerPeriod + ) +{ + if (TimerPeriod == NULL) { + return EFI_INVALID_PARAMETER; + } + + *TimerPeriod = mTimerPeriod; + + return EFI_SUCCESS; +} + +/** + + This function generates a soft timer interrupt. If the platform does not support soft + timer interrupts, then EFI_UNSUPPORTED is returned. Otherwise, EFI_SUCCESS is returned. + If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.RegisterHandler() + service, then a soft timer interrupt will be generated. If the timer interrupt is + enabled when this service is called, then the registered handler will be invoked. The + registered handler should not be able to distinguish a hardware-generated timer + interrupt from a software-generated timer interrupt. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + + @retval EFI_SUCCESS The soft timer interrupt was generated. + @retval EFI_UNSUPPORTED The platform does not support the generation of soft timer interrupts. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGenerateSoftInterrupt ( + IN EFI_TIMER_ARCH_PROTOCOL *This + ) +{ + EFI_TPL OriginalTPL; + + if (GetApicTimerInterruptState()) { + // + // Invoke the registered handler + // + OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL); + + DisableApicTimerInterrupt(); + if (mTimerNotifyFunction != NULL) { + // + // @bug : This does not handle missed timer interrupts + // + mTimerNotifyFunction (mTimerPeriod); + } + + gBS->RestoreTPL (OriginalTPL); + } else { + return EFI_UNSUPPORTED; + } + + return EFI_SUCCESS; +} + +/** + Initialize the Timer Architectural Protocol driver + + @param ImageHandle ImageHandle of the loaded driver + @param SystemTable Pointer to the System Table + + @retval EFI_SUCCESS Timer Architectural Protocol created + @retval EFI_OUT_OF_RESOURCES Not enough resources available to initialize driver. + @retval EFI_DEVICE_ERROR A device error occured attempting to initialize the driver. + +**/ +EFI_STATUS +EFIAPI +TimerDriverInitialize ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + UINT32 TimerVector; + + // + // Initialize the pointer to our notify function. + // + mTimerNotifyFunction = NULL; + + // + // Make sure the Timer Architectural Protocol is not already installed in the system + // + ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiTimerArchProtocolGuid); + + // + // Find the CPU architectural protocol. + // + Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **) &mCpu); + ASSERT_EFI_ERROR (Status); + + + // + // Force the timer to be disabled + // + DisableApicTimerInterrupt(); + + // + // Get the interrupt vector number corresponding to IRQ0 from the 8259 driver + // + TimerVector = 32; + InitializeApicTimer(2, 0, 1, TimerVector); + + // + // Install interrupt handler for 8254 Timer #0 (ISA IRQ0) + // + Status = mCpu->RegisterInterruptHandler (mCpu, TimerVector, TimerInterruptHandler); + ASSERT_EFI_ERROR (Status); + + // + // Force the timer to be enabled at its default period + // + Status = TimerDriverSetTimerPeriod (&mTimer, DEFAULT_TIMER_TICK_DURATION); + ASSERT_EFI_ERROR (Status); + + // + // Install the Timer Architectural Protocol onto a new handle + // + Status = gBS->InstallMultipleProtocolInterfaces ( + &mTimerHandle, + &gEfiTimerArchProtocolGuid, &mTimer, + NULL + ); + ASSERT_EFI_ERROR (Status); + + return Status; +} + diff --git a/OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.inf b/OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.inf new file mode 100644 index 0000000..43e137c --- /dev/null +++ b/OvmfPkg/XenTimerLocalApic/XenTimerLocalApic.inf @@ -0,0 +1,51 @@ +## @file +# 8254 timer driver that provides Timer Arch protocol. +# +# Copyright (c) 2005 - 2014, Intel Corporation. All rights reserved.
+# 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 = ApicTimer + FILE_GUID = 52fe8196-f9de-4d07-b22f-51f77a0e7c41 + MODULE_TYPE = DXE_DRIVER + VERSION_STRING = 1.0 + + ENTRY_POINT = TimerDriverInitialize + +[Packages] + MdePkg/MdePkg.dec + IntelFrameworkPkg/IntelFrameworkPkg.dec + UefiCpuPkg/UefiCpuPkg.dec + OvmfPkg/OvmfPkg.dec + +[LibraryClasses] + UefiBootServicesTableLib + BaseLib + DebugLib + UefiDriverEntryPoint + IoLib + LocalApicLib + +[Sources] + Timer.h + XenTimerLocalApic.c + +[Protocols] + gEfiCpuArchProtocolGuid ## CONSUMES + gEfiTimerArchProtocolGuid ## PRODUCES +[Pcd.IA32, Pcd.X64] + gEfiMdePkgTokenSpaceGuid.PcdFSBClock ## CONSUMES + +[Depex] + gEfiCpuArchProtocolGuid# AND gEfiLegacy8259ProtocolGuid +#[UserExtensions.TianoCore."ExtraFiles"] + #TimerExtra.uni -- Anthony PERARD