From nobody Mon Feb 9 20:59:01 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) client-ip=66.175.222.108; envelope-from=bounce+27952+95130+1787277+3901457@groups.io; helo=mail02.groups.io; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+95130+1787277+3901457@groups.io ARC-Seal: i=1; a=rsa-sha256; t=1665655180; cv=none; d=zohomail.com; s=zohoarc; b=G9Jr03geh++iy29kOXLCfrdSdBOGCdD8QmLIwcSYBrtmu6JVUTUxwQkswRPHTT+KRSzNrg2CEa+11GYeTYqLUgzpnv98Aa99E11/WYCeO+aszBP11t1dxbiMHQXW+vIGr+8aRF/s+b9myOZWXd1OKsNkMXGMCXq9UMOacP/zMh0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1665655180; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:References:Sender:Subject:To; bh=hWv2MuFYd4A3eqatf8dnoOY8DbsGfdD+dfJjUoQYBHk=; b=JOCMbnRzPi/SrKNlFTnY+auDf7mfbbrDHR+kJK/AQZne+tzketSNVEf6KzJPwqsoic9S3anJUYLTCJk0bE59GGx42KGnEUyVr8Hx6rafqMENzgfCyPn2UaZnG/R8YIEzza9IhdBJyTEU5hoaaa0h3/ebXCkjdKKB5qV7xza1aus= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+95130+1787277+3901457@groups.io Received: from mail02.groups.io (mail02.groups.io [66.175.222.108]) by mx.zohomail.com with SMTPS id 1665655180173580.8230238709705; Thu, 13 Oct 2022 02:59:40 -0700 (PDT) Return-Path: X-Received: by 127.0.0.2 with SMTP id ahEVYY1788612xayj79Bv3tT; Thu, 13 Oct 2022 02:59:39 -0700 X-Received: from mail-pl1-f181.google.com (mail-pl1-f181.google.com [209.85.214.181]) by mx.groups.io with SMTP id smtpd.web11.5670.1665655178481380837 for ; Thu, 13 Oct 2022 02:59:38 -0700 X-Received: by mail-pl1-f181.google.com with SMTP id l4so1344110plb.8 for ; Thu, 13 Oct 2022 02:59:38 -0700 (PDT) X-Gm-Message-State: VHhXGFJ8v3RShh75rsPQZiSFx1787277AA= X-Google-Smtp-Source: AMsMyM6uvaP753qJTnQyRCnm8WvZR58QiMNY6CION2GvVKah/H3Hj8HDijG0Y+ZrTSE0NKmAvFOXDw== X-Received: by 2002:a17:902:a508:b0:181:2875:3b09 with SMTP id s8-20020a170902a50800b0018128753b09mr26157547plq.45.1665655177698; Thu, 13 Oct 2022 02:59:37 -0700 (PDT) X-Received: from localhost.localdomain ([49.206.13.138]) by smtp.gmail.com with ESMTPSA id w8-20020a17090abc0800b0020d43c5c9a0sm2931845pjr.18.2022.10.13.02.59.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Oct 2022 02:59:36 -0700 (PDT) From: "Sunil V L" To: devel@edk2.groups.io Cc: Eric Dong , Ray Ni , Rahul Kumar , Daniel Schaefer Subject: [edk2-devel] [edk2-staging/RiscV64QemuVirt PATCH V3 20/34] UefiCpuPkg: Add CpuTimerDxe module Date: Thu, 13 Oct 2022 15:28:15 +0530 Message-Id: <20221013095829.1454581-21-sunilvl@ventanamicro.com> In-Reply-To: <20221013095829.1454581-1-sunilvl@ventanamicro.com> References: <20221013095829.1454581-1-sunilvl@ventanamicro.com> MIME-Version: 1.0 Precedence: Bulk List-Unsubscribe: List-Subscribe: List-Help: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,sunilvl@ventanamicro.com Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1665655179; bh=FGRTdf0qlxredjFgyx15xLBGh3bk7i3VaKyscFGqevE=; h=Cc:Date:From:Reply-To:Subject:To; b=EPU6g0xZDsdbD0oEvZAfTHKc/kRFRjpLjKu1fIq5EA0cWF+gEhjBvx/RNWx1FPK9/jx FXZdzo8y24ByIGl6Fi45Vkx2KNf+pdL90VLdQiMcEdWx473oDVvR1zKMNmeHRkm27lyj6 zL2wWu+8OnOlYr/PlJSZkwYnfTdk9DT5mLw= X-ZohoMail-DKIM: pass (identity @groups.io) X-ZM-MESSAGEID: 1665655182162100001 Content-Type: text/plain; charset="utf-8" REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3D4076 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 =20 +[Components.RISCV64] + UefiCpuPkg/CpuTimerDxe/CpuTimerDxe.inf + [BuildOptions] *_*_*_CC_FLAGS =3D -D DISABLE_NEW_DEPRECATED_INTERFACES diff --git a/UefiCpuPkg/CpuTimerDxe/CpuTimerDxe.inf b/UefiCpuPkg/CpuTimerDx= e/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 right= s reserved.
+# +# SPDX-License-Identifier: BSD-2-Clause-Patent +# +## + +[Defines] + INF_VERSION =3D 0x0001001b + BASE_NAME =3D CpuTimerDxe + MODULE_UNI_FILE =3D CpuTimer.uni + FILE_GUID =3D 055DDAC6-9142-4013-BF20-FC2E5BC325C9 + MODULE_TYPE =3D DXE_DRIVER + VERSION_STRING =3D 1.0 + ENTRY_POINT =3D TimerDriverInitialize +# +# The following information is for reference only and not required by the = build +# tools. +# +# VALID_ARCHITECTURES =3D 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/CpuTimerDx= e/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 right= s 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 =3D 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 initial= ize driver. + @retval EFI_DEVICE_ERROR A device error occured attempting to init= ialize 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 specif= ied + 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 inter= rupt + 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 t= he + interrupt controller so that a CPU interrupt is not generated when the t= imer + 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 th= at 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 o= f the timer interrupt. + @retval EFI_DEVICE_ERROR The timer period could not be changed d= ue 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 specif= ied + 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 inter= rupt + 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 t= he + interrupt controller so that a CPU interrupt is not generated when the t= imer + 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 th= at 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 o= f the timer interrupt. + @retval EFI_DEVICE_ERROR The timer period could not be changed d= ue 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 TimerPer= iod + 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 disabl= ed. + + @retval EFI_SUCCESS The timer period was returned in TimerPer= iod. + @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_SUCCE= SS is returned. + If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.Reg= isterHandler() + service, then a soft timer interrupt will be generated. If the timer int= errupt 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-generate= d 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 o= f soft timer interrupts. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGenerateSoftInterrupt ( + IN EFI_TIMER_ARCH_PROTOCOL *This + ) +; + +#endif diff --git a/UefiCpuPkg/CpuTimerDxe/RiscV64/Timer.c b/UefiCpuPkg/CpuTimerDx= e/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 right= s 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 =3D NULL; + +// +// The Timer Architectural Protocol that this driver produces +// +EFI_TIMER_ARCH_PROTOCOL mTimer =3D { + 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 =3D 0; + +/** + Timer Interrupt Handler. + + @param InterruptType The type of interrupt that occured + @param SystemContext A pointer to the system context when the interru= pt occured +**/ +VOID +EFIAPI +TimerInterruptHandler ( + IN EFI_EXCEPTION_TYPE InterruptType, + IN EFI_SYSTEM_CONTEXT SystemContext + ) +{ + EFI_TPL OriginalTPL; + UINT64 RiscvTimer; + + OriginalTPL =3D gBS->RaiseTPL (TPL_HIGH_LEVEL); + if (mTimerNotifyFunction !=3D NULL) { + mTimerNotifyFunction (mTimerPeriod); + } + + RiscVDisableTimerInterrupt (); // Disable SMode timer int + RiscVClearPendingTimerInterrupt (); + if (mTimerPeriod =3D=3D 0) { + gBS->RestoreTPL (OriginalTPL); + RiscVDisableTimerInterrupt (); // Disable SMode timer int + return; + } + + RiscvTimer =3D RiscVReadTimer (); + SbiSetTimer (RiscvTimer +=3D 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 han= dler, + then EFI_UNSUPPORTED is returned. If an attempt is made to register a h= andler + when a handler is already registered, then EFI_ALREADY_STARTED is return= ed. + If an attempt is made to unregister a handler when a handler is not regi= stered, + then EFI_INVALID_PARAMETER is returned. If an error occurs attempting to + register the NotifyFunction with the timer interrupt, then EFI_DEVICE_ER= ROR + is returned. + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param NotifyFunction The function to call when a timer interrupt fire= s. This + function executes at TPL_HIGH_LEVEL. The DXE Co= re will + register a handler for the timer interrupt, so i= t can know + how much time has passed. This information is u= sed 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 time= r interrupts. + @retval EFI_ALREADY_STARTED NotifyFunction is not NULL, and a = handler is already + registered. + @retval EFI_INVALID_PARAMETER NotifyFunction is NULL, and a hand= ler was not + previously registered. + @retval EFI_DEVICE_ERROR The timer handler could not be reg= istered. + +**/ +EFI_STATUS +EFIAPI +TimerDriverRegisterHandler ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + IN EFI_TIMER_NOTIFY NotifyFunction + ) +{ + DEBUG ((DEBUG_INFO, "TimerDriverRegisterHandler(0x%lx) called\n", Notify= Function)); + mTimerNotifyFunction =3D NotifyFunction; + return EFI_SUCCESS; +} + +/** + + This function adjusts the period of timer interrupts to the value specif= ied + 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 inter= rupt + 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 t= he + interrupt controller so that a CPU interrupt is not generated when the t= imer + 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 th= at 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 o= f the timer interrupt. + @retval EFI_DEVICE_ERROR The timer period could not be changed d= ue 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 =3D=3D 0) { + mTimerPeriod =3D 0; + RiscVDisableTimerInterrupt (); // Disable SMode timer int + return EFI_SUCCESS; + } + + mTimerPeriod =3D TimerPeriod / 10; // convert unit from 100ns to 1us + RiscvTimer =3D 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 TimerPer= iod + 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 disabl= ed. + + @retval EFI_SUCCESS The timer period was returned in TimerPer= iod. + @retval EFI_INVALID_PARAMETER TimerPeriod is NULL. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGetTimerPeriod ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + OUT UINT64 *TimerPeriod + ) +{ + *TimerPeriod =3D 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_SUCCE= SS is returned. + If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.Reg= isterHandler() + service, then a soft timer interrupt will be generated. If the timer int= errupt 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-generate= d 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 o= f 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 initial= ize driver. + @retval EFI_DEVICE_ERROR A device error occured attempting to init= ialize 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 =3D NULL; + + // + // Make sure the Timer Architectural Protocol is not already installed i= n the system + // + ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiTimerArchProtocolGuid); + + // + // Find the CPU architectural protocol. + // + Status =3D gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **= )&mCpu); + ASSERT_EFI_ERROR (Status); + + // + // Force the timer to be disabled + // + Status =3D TimerDriverSetTimerPeriod (&mTimer, 0); + ASSERT_EFI_ERROR (Status); + + // + // Install interrupt handler for RISC-V Timer. + // + Status =3D mCpu->RegisterInterruptHandler (mCpu, EXCEPT_RISCV_TIMER_INT,= TimerInterruptHandler); + ASSERT_EFI_ERROR (Status); + + // + // Force the timer to be enabled at its default period + // + Status =3D TimerDriverSetTimerPeriod (&mTimer, DEFAULT_TIMER_TICK_DURATI= ON); + ASSERT_EFI_ERROR (Status); + + // + // Install the Timer Architectural Protocol onto a new handle + // + Status =3D gBS->InstallMultipleProtocolInterfaces ( + &mTimerHandle, + &gEfiTimerArchProtocolGuid, + &mTimer, + NULL + ); + ASSERT_EFI_ERROR (Status); + return Status; +} diff --git a/UefiCpuPkg/CpuTimerDxe/CpuTimer.uni b/UefiCpuPkg/CpuTimerDxe/C= puTimer.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 righ= ts 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/CpuTimer= Dxe/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 righ= ts 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" --=20 2.25.1 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#95130): https://edk2.groups.io/g/devel/message/95130 Mute This Topic: https://groups.io/mt/94300404/1787277 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-