From nobody Wed Feb 11 00:37:06 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+95462+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+95462+1787277+3901457@groups.io ARC-Seal: i=1; a=rsa-sha256; t=1666336529; cv=none; d=zohomail.com; s=zohoarc; b=F6MOlYZqfgj7j+aK8d3j2twfu4MAqTBRZfkQd05eYJQaS/BA0jj/z4VK710cTU8SdxnNq7twRuQ48mzashQdcZap/A8UwAE0i5btoKt51cDmkVkEN3WpD//AlIrkOEm++9Cq8Q+Vy+A3WYfx1vT4BZBqUMNiokH5P5tqFOniqpA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1666336529; 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=uzLG1NYN+nHlB8Uig+3o86VCUD0oj4EnoloamM11870=; b=G9WyxMeijhyL41HfI79vfiNb1sNLc8Wo8cGFulBwhW9yyVqFZ3rfaVLglw9BrXOe/p9+Cm44vUgJVZPABmK5mfLCJkCK3jS6/EPbKLXhrNey+YWl5Udi6k4vrW1sDifAp0qLowV5WhQt5HEQx1Kw4r/InQ+HsqsvTBFtdn+w39Q= 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+95462+1787277+3901457@groups.io Received: from mail02.groups.io (mail02.groups.io [66.175.222.108]) by mx.zohomail.com with SMTPS id 1666336529588507.5807803402978; Fri, 21 Oct 2022 00:15:29 -0700 (PDT) Return-Path: X-Received: by 127.0.0.2 with SMTP id jrucYY1788612xb64oK5gUw3; Fri, 21 Oct 2022 00:15:28 -0700 X-Received: from loongson.cn (loongson.cn [114.242.206.163]) by mx.groups.io with SMTP id smtpd.web09.7427.1666336524602863976 for ; Fri, 21 Oct 2022 00:15:25 -0700 X-Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8BxHdkpRlJjyVgBAA--.6107S3; Fri, 21 Oct 2022 15:11:37 +0800 (CST) X-Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Dx_1cjRlJjNIwCAA--.10417S12; Fri, 21 Oct 2022 15:11:36 +0800 (CST) From: "xianglai" To: devel@edk2.groups.io Cc: quic_llindhol@quicinc.com, michael.d.kinney@intel.com, kraxel@redhat.com, ardb@kernel.org, maobibo@loongson.cn Subject: [edk2-devel] [edk2-platforms][PATCH V4 10/14] Platform/Loongson: Add timer Dxe driver. Date: Fri, 21 Oct 2022 15:11:27 +0800 Message-Id: <5879fba4ec369e05be328085a90a4d03278144f3.1666335216.git.lixianglai@loongson.cn> In-Reply-To: References: MIME-Version: 1.0 X-CM-TRANSID: AQAAf8Dx_1cjRlJjNIwCAA--.10417S12 X-CM-SenderInfo: 5ol0xt5qjotxo6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBjvAXoWfKryrCr1kCF43GFWUCw1rJFb_yoW8ZF1DXo W09a9Fvw48Gr18Xa98JFyxJ3W2qFn5uws0qrsYgFykAFnYyw15Kr9FvFy5Kw1fZrW8GFsr A34xWa4kJFZxX3Z5n29KB7ZKAUJUUUUf529EdanIXcx71UUUUU7KY7ZEXasCq-sGcSsGvf J3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnRJU UUkK1xkIjI8I6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64 kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY 1x0267AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aV CY1x0267AKxVWxJr0_GcWln4kS14v26r126r1DM2AIxVAIcxkEcVAq07x20xvEncxIr21l 57IF6xkI12xvs2x26I8E6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6x8ErcxFaV Av8VWrMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCY1x0262kKe7AKxVWU AVWUtwCF04k20xvY0x0EwIxGrwCF04k20xvE74AGY7Cv6cx26rWl4I8I3I0E4IkC6x0Yz7 v_Jr0_Gr1l4IxYO2xFxVAFwI0_JF0_Jw1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8G jcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0xvE2I x0cI8IcVAFwI0_Ar0_tr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26F4j6r4UJwCI42IY6xAI w20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr1j6F4UJwCI42IY6I8E87Iv6x kF7I0E14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7xRiTKZJUUUUU== X-Gw-Check: 6d5c5937937b7219 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,lixianglai@loongson.cn X-Gm-Message-State: vSmzj9hC9OO9viHzwPyc8vLUx1787277AA= Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1666336528; bh=ugkrEL7qqbjaLQYCIUh1xOjOyFF50w8kbCAL3d31FVs=; h=Cc:Date:From:Reply-To:Subject:To; b=YaeveHUbLN544yU3k5ujvPtTv24io8Fgo2S/LAFdovtR+wB99Wh1WiAB6wIXKCi8u4Q iNKMW73wRKZpsvsQvYnybdeUJxEghv5oqQHHaaDpUw3G40P5K0Uzhp6FQMjQTnjgS0soq E2DKW94T3sU+Rp9sNoJyG4HgTgsrttzYcKc= X-ZohoMail-DKIM: pass (identity @groups.io) X-ZM-MESSAGEID: 1666336531417100027 Content-Type: text/plain; charset="utf-8" This driver produces Timer Architectural Protocol, Registers a timer interrupt and initializes the timer. REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3D4054 Signed-off-by: xianglai li --- .../Drivers/StableTimerDxe/Timer.c | 405 ++++++++++++++++++ .../Drivers/StableTimerDxe/Timer.h | 165 +++++++ .../Drivers/StableTimerDxe/TimerDxe.inf | 40 ++ 3 files changed, 610 insertions(+) create mode 100644 Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerD= xe/Timer.c create mode 100644 Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerD= xe/Timer.h create mode 100644 Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerD= xe/TimerDxe.inf diff --git a/Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerDxe/Time= r.c b/Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerDxe/Timer.c new file mode 100644 index 0000000000..68742551ec --- /dev/null +++ b/Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerDxe/Timer.c @@ -0,0 +1,405 @@ +/** @file + Timer Architectural Protocol as defined in the DXE CIS + + Copyright (c) 2021 Loongson Technology Corporation Limited. All rights r= eserved.
+ + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include +#include "Library/Cpu.h" +#include +#include +#include "Timer.h" +#include +#include + +// +// The handle onto which the Timer Architectural Protocol will be installed +// +EFI_HANDLE mTimerHandle =3D NULL; +EFI_EVENT EfiExitBootServicesEvent =3D (EFI_EVENT)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. +// +EFI_TIMER_NOTIFY mTimerNotifyFunction; + +// +// The current period of the timer interrupt +// +volatile UINT64 mTimerPeriod =3D 0; +volatile UINT64 mTimerTicks =3D 0; + +// +// Const frequence in Hz +// +extern UINT32 StableTimerFreq; + +/** + Sets the counter value for timer. + + @param Count The 16-bit counter value to program into stable timer. + + @retval VOID +**/ +VOID +SetPitCount ( + IN UINT64 Count + ) +{ + if (Count <=3D 4) { + return; + } + + Count &=3D LOONGARCH_CSR_TMCFG_TIMEVAL; + Count |=3D LOONGARCH_CSR_TMCFG_EN | LOONGARCH_CSR_TMCFG_PERIOD; + LOONGARCH_CSR_WRITEQ (Count, LOONGARCH_CSR_TMCFG); +} + +/** + Timer Interrupt Handler. + + @param InterruptType The type of interrupt that occurred + @param SystemContext A pointer to the system context when the interru= pt occurred + + @retval VOID +**/ +VOID +EFIAPI +TimerInterruptHandler ( + IN EFI_EXCEPTION_TYPE InterruptType, + IN EFI_SYSTEM_CONTEXT SystemContext + ) +{ + EFI_TPL OriginalTPL; + + OriginalTPL =3D gBS->RaiseTPL (TPL_HIGH_LEVEL); + + // + // Clear interrupt. + // + LOONGARCH_CSR_WRITEQ (0x1, LOONGARCH_CSR_TINTCLR); + + if (mTimerNotifyFunction !=3D NULL) { + // + // @bug : This does not handle missed timer interrupts + // + mTimerNotifyFunction (mTimerPeriod); + } + + 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 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 + ) +{ + // + // Check for invalid parameters + // + if ((NotifyFunction =3D=3D NULL) + && (mTimerNotifyFunction =3D=3D NULL)) + { + return EFI_INVALID_PARAMETER; + } + + if ((NotifyFunction !=3D NULL) + && mTimerNotifyFunction !=3D NULL) + { + return EFI_ALREADY_STARTED; + } + + 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 TimerCount; + + if (TimerPeriod =3D=3D 0) { + // + // Disable timer interrupt for a TimerPeriod of 0 + // + mCpu->DisableInterrupt (mCpu); + } else { + + TimerCount =3D TimerPeriod * StableTimerFreq / 10000000ULL; + + if (TimerCount >=3D BIT48) { + TimerCount =3D 0; + } + + // + // Program the stable timer with the new count value + // + mTimerTicks =3D TimerCount; + SetPitCount (TimerCount); + + // + // Enable timer interrupt + // + mCpu->EnableInterrupt (mCpu); + } + + // + // Save the new timer period + // + mTimerPeriod =3D 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 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 + ) +{ + if (TimerPeriod =3D=3D NULL) { + return EFI_INVALID_PARAMETER; + } + + *TimerPeriod =3D mTimerPeriod; + + return EFI_SUCCESS; +} + +/** + Disable the timer +**/ + +/** + Disable the timer + DXE Core will disable the timer after all the event handlers have run. + + @param[in] Event The Event that is being processed + @param[in] Context Event Context +**/ +VOID +EFIAPI +ExitBootServicesEvent ( + IN EFI_EVENT Event, + IN VOID *Context + ) +{ + /* + * Disable timer interrupt when exiting boot service + */ + LOONGARCH_CSR_WRITEQ (0, LOONGARCH_CSR_TMCFG); +} + +/** + + 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_UNSUPPORTED The platform does not support the generation o= f soft timer interrupts. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGenerateSoftInterrupt ( + IN EFI_TIMER_ARCH_PROTOCOL *This + ) +{ + return EFI_UNSUPPORTED; +} + +/** + 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 occurred attempting to ini= tialize the driver. + +**/ +EFI_STATUS +EFIAPI +StableTimerDriverInitialize ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + UINT32 TimerVector; + + // + // 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); + + // + // Calculate const frequence + // + StableTimerFreq =3D CalcConstFreq (); + DEBUG ((DEBUG_INFO, "=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3DStable timer freq = %d Hz=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D\n", StableTimerFreq)); + + // + // Install interrupt handler for Stable Timer #0 (ISA IRQ0) + // + TimerVector =3D EXCEPT_LOONGARCH_INT_TIMER; + Status =3D mCpu->RegisterInterruptHandler (mCpu, TimerVector, TimerInter= ruptHandler); + ASSERT_EFI_ERROR (Status); + + // + // Enable TI local timer interrupt + // + CpuSetIP (1 << 11); + + // + // 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); + + // Register for an ExitBootServicesEvent + Status =3D gBS->CreateEvent (EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_NOTIFY, = ExitBootServicesEvent, NULL, + &EfiExitBootServicesEvent); + ASSERT_EFI_ERROR (Status); + + return Status; +} diff --git a/Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerDxe/Time= r.h b/Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerDxe/Timer.h new file mode 100644 index 0000000000..7fe5c9c179 --- /dev/null +++ b/Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerDxe/Timer.h @@ -0,0 +1,165 @@ +/** @file + Private data structures + + Copyright (c) 2021 Loongson Technology Corporation Limited. All rights r= eserved.
+ + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#ifndef TIMER_H_ +#define TIMER_H_ + +#include + + +#define DEFAULT_TIMER_TICK_DURATION 100000 //10ms =3D 100000 100 ns units +#define SR_IP7 (1 << 15) +// +// Function Prototypes +// +extern UINT32 EFIAPI CpuGetCompare(VOID); +extern VOID EFIAPI CpuSetCompare(IN UINT32 val); +extern VOID EFIAPI CpuSetIP(IN UINT32 val); +extern VOID EFIAPI ClearC0Cause(IN UINT32 val); +extern VOID EFIAPI ClearC0Status(IN UINT32 val); +/** + 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 occurred attempting to ini= tialize 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_UNSUPPORTED 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/Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerDxe/Time= rDxe.inf b/Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerDxe/TimerD= xe.inf new file mode 100644 index 0000000000..10e6b9a85e --- /dev/null +++ b/Platform/Loongson/LoongArchQemuPkg/Drivers/StableTimerDxe/TimerDxe.inf @@ -0,0 +1,40 @@ +## @file +# Stable timer driver that provides Timer Arch protocol. +# +# Copyright (c) 2021 Loongson Technology Corporation Limited. All rights = reserved.
+# +# SPDX-License-Identifier: BSD-2-Clause-Patent +# +## +[Defines] + INF_VERSION =3D 0x00010005 + BASE_NAME =3D Timer + MODULE_UNI_FILE =3D Timer.uni + FILE_GUID =3D AEBE2648-47A9-40FA-83FD-06AA88443BB2 + MODULE_TYPE =3D DXE_DRIVER + VERSION_STRING =3D 1.0 + + ENTRY_POINT =3D StableTimerDriverInitialize + +[Packages] + MdePkg/MdePkg.dec + Platform/Loongson/LoongArchQemuPkg/Loongson.dec + +[LibraryClasses] + UefiBootServicesTableLib + BaseLib + DebugLib + UefiDriverEntryPoint + IoLib + TimerLib + +[Sources] + Timer.h + Timer.c + +[Protocols] + gEfiCpuArchProtocolGuid ## CONSUMES + gEfiTimerArchProtocolGuid ## PRODUCES + +[depex] + TRUE --=20 2.31.1 -=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 (#95462): https://edk2.groups.io/g/devel/message/95462 Mute This Topic: https://groups.io/mt/94471368/1787277 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-