From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f49.google.com (mail-pj1-f49.google.com [209.85.216.49]) by mx.groups.io with SMTP id smtpd.web12.4583.1665396785420607572 for ; Mon, 10 Oct 2022 03:13:05 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@ventanamicro.com header.s=google header.b=HIlGV5Q8; spf=pass (domain: ventanamicro.com, ip: 209.85.216.49, mailfrom: sunilvl@ventanamicro.com) Received: by mail-pj1-f49.google.com with SMTP id 70so9446104pjo.4 for ; Mon, 10 Oct 2022 03:13:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=KQ3a1anAXq/+FSRKgIX/cPAr9rg2jr/G85bgF1lq+Qg=; b=HIlGV5Q88BroRCyCRnyK2hfbt9U6HOPbAN4YsW7Bq4bUtXR+5izsEfZJ8fJbGOsqDQ yVkRu4pG4r756ViTdUA1d2N6zIj7weQt1XVSKgABgpbCZYEvH89mirkmYYg7ab8NIx6d cPqPrAjYYuqnn3Z8wUPwdQFGh9i8RqgCuBs2mcaiZlcOj5MMsOSbYFhf19lqChX4Wx/C GQKySGYm0UiNgFUo8ydv+2zRYGAjMs6HJoKVeRx4kvEn+zl5+tGqr9FmMEZw2qOYKFj7 ptXhW23bqMo8qw/kyi1cXaC9zHVB0Z1qtPuO3gVAmYYZCZg9ad0Q6spLSLgtCpiYjTF+ VY2g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=KQ3a1anAXq/+FSRKgIX/cPAr9rg2jr/G85bgF1lq+Qg=; b=w/hMaGtY3msPh6s2M8mctv1wB8DvLP5XQHNk8tc6i2Xl0hu2Tp5SHIx1ixns7Zb7rA XxDXjtyVIg9Z50I+xztH0dvOB0KNuWwDnzEMCiPDLGZHUwSB8RP7JdmD0Mz9ck8wIdng io1nXx+dduV8c2wHY0h/sDM+/52WzMyR8/QHHw8LJH6RarstgwpQ6MqgK6puZslYHPcR zOpLtb2ryQFA6b7LrOIoMk2Fc90vfCNEc8+p/m07d71oSV/Vj/pa58m+TkAqfVrPRRI1 y73sY4/pz3C/Ylk38pYddEm9yPraaFPWDmwHCBv1ad672+1mxcvJ2AasKCCllXqnMoJu vwqQ== X-Gm-Message-State: ACrzQf0yj2iJzB/hp8QGVA73BNR5JVT/IzJiD9NvQ0eF4WsR3+920TQz UC93hjakcMBMMQ3bhhkul3/f8mhN2TJLFA== X-Google-Smtp-Source: AMsMyM7Jrvf7Vyc5el7nK0aF2UCDC64I3ww2ICa9UMv9HAWwM9mcjcCnnmV8eHxNcJBbBgPeqRyn6Q== X-Received: by 2002:a17:902:9049:b0:180:7922:ce36 with SMTP id w9-20020a170902904900b001807922ce36mr14409587plz.30.1665396784668; Mon, 10 Oct 2022 03:13:04 -0700 (PDT) Return-Path: Received: from localhost.localdomain ([49.206.13.138]) by smtp.gmail.com with ESMTPSA id h17-20020a170902f55100b001788ccecbf5sm6302138plf.31.2022.10.10.03.13.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Oct 2022 03:13:04 -0700 (PDT) From: "Sunil V L" To: devel@edk2.groups.io Cc: Eric Dong , Ray Ni , Rahul Kumar , Daniel Schaefer Subject: [edk2-staging/RiscV64QemuVirt PATCH 20/29] UefiCpuPkg: Add CpuTimerDxe module Date: Mon, 10 Oct 2022 15:41:53 +0530 Message-Id: <20221010101202.1146624-21-sunilvl@ventanamicro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221010101202.1146624-1-sunilvl@ventanamicro.com> References: <20221010101202.1146624-1-sunilvl@ventanamicro.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4076 This DXE module initializes the timer interrupt handler and installs the Arch Timer protocol. Cc: Eric Dong Cc: Ray Ni Cc: Rahul Kumar Cc: Daniel Schaefer Signed-off-by: Sunil V L --- UefiCpuPkg/UefiCpuPkg.dsc | 3 + UefiCpuPkg/CpuTimerDxe/CpuTimerDxe.inf | 51 ++++ UefiCpuPkg/CpuTimerDxe/RiscV64/Timer.h | 177 ++++++++++++++ UefiCpuPkg/CpuTimerDxe/RiscV64/Timer.c | 294 +++++++++++++++++++++++ UefiCpuPkg/CpuTimerDxe/CpuTimer.uni | 15 ++ UefiCpuPkg/CpuTimerDxe/CpuTimerExtra.uni | 13 + 6 files changed, 553 insertions(+) create mode 100644 UefiCpuPkg/CpuTimerDxe/CpuTimerDxe.inf create mode 100644 UefiCpuPkg/CpuTimerDxe/RiscV64/Timer.h create mode 100644 UefiCpuPkg/CpuTimerDxe/RiscV64/Timer.c create mode 100644 UefiCpuPkg/CpuTimerDxe/CpuTimer.uni create mode 100644 UefiCpuPkg/CpuTimerDxe/CpuTimerExtra.uni diff --git a/UefiCpuPkg/UefiCpuPkg.dsc b/UefiCpuPkg/UefiCpuPkg.dsc index 6ea90507e36f..54ef5edd6eae 100644 --- a/UefiCpuPkg/UefiCpuPkg.dsc +++ b/UefiCpuPkg/UefiCpuPkg.dsc @@ -178,5 +178,8 @@ [Components.IA32, Components.X64] UefiCpuPkg/Library/SmmCpuRendezvousLib/SmmCpuRendezvousLib.inf UefiCpuPkg/Library/CpuPageTableLib/CpuPageTableLib.inf +[Components.RISCV64] + UefiCpuPkg/CpuTimerDxe/CpuTimerDxe.inf + [BuildOptions] *_*_*_CC_FLAGS = -D DISABLE_NEW_DEPRECATED_INTERFACES diff --git a/UefiCpuPkg/CpuTimerDxe/CpuTimerDxe.inf b/UefiCpuPkg/CpuTimerDxe/CpuTimerDxe.inf new file mode 100644 index 000000000000..d7706328b591 --- /dev/null +++ b/UefiCpuPkg/CpuTimerDxe/CpuTimerDxe.inf @@ -0,0 +1,51 @@ +## @file +# Timer Arch protocol module +# +# Copyright (c) 2019, Hewlett Packard Enterprise Development LP. All rights reserved.
+# +# SPDX-License-Identifier: BSD-2-Clause-Patent +# +## + +[Defines] + INF_VERSION = 0x0001001b + BASE_NAME = CpuTimerDxe + MODULE_UNI_FILE = CpuTimer.uni + FILE_GUID = 055DDAC6-9142-4013-BF20-FC2E5BC325C9 + MODULE_TYPE = DXE_DRIVER + VERSION_STRING = 1.0 + ENTRY_POINT = TimerDriverInitialize +# +# The following information is for reference only and not required by the build +# tools. +# +# VALID_ARCHITECTURES = RISCV64 +# +[Packages] + MdePkg/MdePkg.dec + UefiCpuPkg/UefiCpuPkg.dec + +[LibraryClasses] + BaseLib + DebugLib + IoLib + CpuLib + UefiBootServicesTableLib + UefiDriverEntryPoint + +[LibraryClasses.RISCV64] + RiscVSbiLib + +[Sources.RISCV64] + RiscV64/Timer.h + RiscV64/Timer.c + +[Protocols] + gEfiCpuArchProtocolGuid ## CONSUMES + gEfiTimerArchProtocolGuid ## PRODUCES + +[Depex] + gEfiCpuArchProtocolGuid + +[UserExtensions.TianoCore."ExtraFiles"] + CpuTimerExtra.uni diff --git a/UefiCpuPkg/CpuTimerDxe/RiscV64/Timer.h b/UefiCpuPkg/CpuTimerDxe/RiscV64/Timer.h new file mode 100644 index 000000000000..586eb0cfadb4 --- /dev/null +++ b/UefiCpuPkg/CpuTimerDxe/RiscV64/Timer.h @@ -0,0 +1,177 @@ +/** @file + RISC-V Timer Architectural Protocol definitions + + Copyright (c) 2019, Hewlett Packard Enterprise Development LP. All rights reserved.
+ + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#ifndef TIMER_H_ +#define TIMER_H_ + +#include + +#include +#include + +#include +#include +#include +#include + +// +// RISC-V use 100us timer. +// The default timer tick duration is set to 10 ms = 10 * 1000 * 10 100 ns units +// +#define DEFAULT_TIMER_TICK_DURATION 100000 + +extern VOID +RiscvSetTimerPeriod ( + UINT32 TimerPeriod + ); + +// +// 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_UNSUPPORTEDT 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/UefiCpuPkg/CpuTimerDxe/RiscV64/Timer.c b/UefiCpuPkg/CpuTimerDxe/RiscV64/Timer.c new file mode 100644 index 000000000000..db153f715e60 --- /dev/null +++ b/UefiCpuPkg/CpuTimerDxe/RiscV64/Timer.c @@ -0,0 +1,294 @@ +/** @file + RISC-V Timer Architectural Protocol + + Copyright (c) 2019, Hewlett Packard Enterprise Development LP. All rights reserved.
+ + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include +#include +#include "Timer.h" + +// +// The handle onto which the Timer Architectural Protocol will be installed +// +STATIC 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. +// +STATIC EFI_TIMER_NOTIFY mTimerNotifyFunction; + +// +// The current period of the timer interrupt +// +STATIC UINT64 mTimerPeriod = 0; + +/** + Timer 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; + UINT64 RiscvTimer; + + OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL); + if (mTimerNotifyFunction != NULL) { + mTimerNotifyFunction (mTimerPeriod); + } + + RiscVDisableTimerInterrupt (); // Disable SMode timer int + RiscVClearPendingTimerInterrupt (); + if (mTimerPeriod == 0) { + gBS->RestoreTPL (OriginalTPL); + RiscVDisableTimerInterrupt (); // Disable SMode timer int + return; + } + + RiscvTimer = RiscVReadTimer (); + SbiSetTimer (RiscvTimer += mTimerPeriod); + gBS->RestoreTPL (OriginalTPL); + RiscVEnableTimerInterrupt (); // enable SMode timer int +} + +/** + + 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 + ) +{ + DEBUG ((DEBUG_INFO, "TimerDriverRegisterHandler(0x%lx) called\n", NotifyFunction)); + 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 RiscvTimer; + + DEBUG ((DEBUG_INFO, "TimerDriverSetTimerPeriod(0x%lx)\n", TimerPeriod)); + + if (TimerPeriod == 0) { + mTimerPeriod = 0; + RiscVDisableTimerInterrupt (); // Disable SMode timer int + return EFI_SUCCESS; + } + + mTimerPeriod = TimerPeriod / 10; // convert unit from 100ns to 1us + RiscvTimer = RiscVReadTimer (); + SbiSetTimer (RiscvTimer + mTimerPeriod); + + mCpu->EnableInterrupt (mCpu); + RiscVEnableTimerInterrupt (); // enable SMode timer int + 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 + ) +{ + *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_UNSUPPORTEDT The platform does not support the generation of soft timer interrupts. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGenerateSoftInterrupt ( + IN EFI_TIMER_ARCH_PROTOCOL *This + ) +{ + 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; + + // + // 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 + // + Status = TimerDriverSetTimerPeriod (&mTimer, 0); + ASSERT_EFI_ERROR (Status); + + // + // Install interrupt handler for RISC-V Timer. + // + Status = mCpu->RegisterInterruptHandler (mCpu, EXCEPT_RISCV_TIMER_INT, 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/UefiCpuPkg/CpuTimerDxe/CpuTimer.uni b/UefiCpuPkg/CpuTimerDxe/CpuTimer.uni new file mode 100644 index 000000000000..07272a8a787b --- /dev/null +++ b/UefiCpuPkg/CpuTimerDxe/CpuTimer.uni @@ -0,0 +1,15 @@ +// /** @file +// +// Timer Arch protocol strings. +// +// Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.
+// Copyright (c) 2022, Ventana Micro Systems Inc. All rights reserved.
+// +// SPDX-License-Identifier: BSD-2-Clause-Patent +// +// **/ + + +#string STR_MODULE_ABSTRACT #language en-US "Timer driver that provides Timer Arch protocol" + +#string STR_MODULE_DESCRIPTION #language en-US "Timer driver that provides Timer Arch protocol." diff --git a/UefiCpuPkg/CpuTimerDxe/CpuTimerExtra.uni b/UefiCpuPkg/CpuTimerDxe/CpuTimerExtra.uni new file mode 100644 index 000000000000..ad80afe2674c --- /dev/null +++ b/UefiCpuPkg/CpuTimerDxe/CpuTimerExtra.uni @@ -0,0 +1,13 @@ +// /** @file +// Timer Localized Strings and Content +// +// Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.
+// Copyright (c) 2022, Ventana Micro Systems Inc. All rights reserved.
+// +// SPDX-License-Identifier: BSD-2-Clause-Patent +// +// **/ + +#string STR_PROPERTIES_MODULE_NAME +#language en-US +"Timer DXE Driver" -- 2.25.1