e3ba31da1c
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Ray Ni <ray.ni@intel.com>
1405 lines
53 KiB
C
1405 lines
53 KiB
C
/** @file
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Construct MP Services Protocol on top of the EMU Thread protocol.
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This code makes APs show up in the emulator. PcdEmuApCount is the
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number of APs the emulator should produce.
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The MP Services Protocol provides a generalized way of performing following tasks:
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- Retrieving information of multi-processor environment and MP-related status of
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specific processors.
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- Dispatching user-provided function to APs.
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- Maintain MP-related processor status.
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The MP Services Protocol must be produced on any system with more than one logical
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processor.
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The Protocol is available only during boot time.
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MP Services Protocol is hardware-independent. Most of the logic of this protocol
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is architecturally neutral. It abstracts the multi-processor environment and
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status of processors, and provides interfaces to retrieve information, maintain,
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and dispatch.
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MP Services Protocol may be consumed by ACPI module. The ACPI module may use this
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protocol to retrieve data that are needed for an MP platform and report them to OS.
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MP Services Protocol may also be used to program and configure processors, such
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as MTRR synchronization for memory space attributes setting in DXE Services.
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MP Services Protocol may be used by non-CPU DXE drivers to speed up platform boot
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by taking advantage of the processing capabilities of the APs, for example, using
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APs to help test system memory in parallel with other device initialization.
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Diagnostics applications may also use this protocol for multi-processor.
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Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
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Portitions Copyright (c) 2011, Apple Inc. All rights reserved.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "CpuDriver.h"
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MP_SYSTEM_DATA gMPSystem;
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EMU_THREAD_THUNK_PROTOCOL *gThread = NULL;
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EFI_EVENT gReadToBootEvent;
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BOOLEAN gReadToBoot = FALSE;
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UINTN gPollInterval;
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BOOLEAN
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IsBSP (
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VOID
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)
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{
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EFI_STATUS Status;
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UINTN ProcessorNumber;
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Status = CpuMpServicesWhoAmI (&mMpServicesTemplate, &ProcessorNumber);
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if (EFI_ERROR (Status)) {
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return FALSE;
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}
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return (gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0;
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}
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VOID
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SetApProcedure (
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IN PROCESSOR_DATA_BLOCK *Processor,
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IN EFI_AP_PROCEDURE Procedure,
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IN VOID *ProcedureArgument
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)
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{
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gThread->MutexLock (Processor->ProcedureLock);
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Processor->Parameter = ProcedureArgument;
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Processor->Procedure = Procedure;
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gThread->MutexUnlock (Processor->ProcedureLock);
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}
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EFI_STATUS
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GetNextBlockedNumber (
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OUT UINTN *NextNumber
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)
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{
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UINTN Number;
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PROCESSOR_STATE ProcessorState;
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PROCESSOR_DATA_BLOCK *Data;
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for (Number = 0; Number < gMPSystem.NumberOfProcessors; Number++) {
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Data = &gMPSystem.ProcessorData[Number];
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if ((Data->Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0) {
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// Skip BSP
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continue;
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}
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gThread->MutexLock (Data->StateLock);
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ProcessorState = Data->State;
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gThread->MutexUnlock (Data->StateLock);
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if (ProcessorState == CPU_STATE_BLOCKED) {
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*NextNumber = Number;
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return EFI_SUCCESS;
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}
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}
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return EFI_NOT_FOUND;
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}
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/**
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* Calculated and stalled the interval time by BSP to check whether
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* the APs have finished.
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*
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* @param[in] Timeout The time limit in microseconds for
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* APs to return from Procedure.
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*
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* @retval StallTime Time of execution stall.
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**/
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UINTN
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CalculateAndStallInterval (
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IN UINTN Timeout
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)
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{
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UINTN StallTime;
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if (Timeout < gPollInterval && Timeout != 0) {
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StallTime = Timeout;
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} else {
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StallTime = gPollInterval;
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}
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gBS->Stall (StallTime);
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return StallTime;
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}
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/**
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This service retrieves the number of logical processor in the platform
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and the number of those logical processors that are enabled on this boot.
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This service may only be called from the BSP.
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This function is used to retrieve the following information:
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- The number of logical processors that are present in the system.
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- The number of enabled logical processors in the system at the instant
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this call is made.
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Because MP Service Protocol provides services to enable and disable processors
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dynamically, the number of enabled logical processors may vary during the
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course of a boot session.
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If this service is called from an AP, then EFI_DEVICE_ERROR is returned.
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If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then
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EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors
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is returned in NumberOfProcessors, the number of currently enabled processor
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is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.
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@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
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instance.
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@param[out] NumberOfProcessors Pointer to the total number of logical
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processors in the system, including the BSP
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and disabled APs.
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@param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
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processors that exist in system, including
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the BSP.
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@retval EFI_SUCCESS The number of logical processors and enabled
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logical processors was retrieved.
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@retval EFI_DEVICE_ERROR The calling processor is an AP.
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@retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL.
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@retval EFI_INVALID_PARAMETER NumberOfEnabledProcessors is NULL.
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**/
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EFI_STATUS
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EFIAPI
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CpuMpServicesGetNumberOfProcessors (
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IN EFI_MP_SERVICES_PROTOCOL *This,
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OUT UINTN *NumberOfProcessors,
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OUT UINTN *NumberOfEnabledProcessors
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)
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{
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if ((NumberOfProcessors == NULL) || (NumberOfEnabledProcessors == NULL)) {
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return EFI_INVALID_PARAMETER;
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}
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if (!IsBSP ()) {
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return EFI_DEVICE_ERROR;
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}
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*NumberOfProcessors = gMPSystem.NumberOfProcessors;
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*NumberOfEnabledProcessors = gMPSystem.NumberOfEnabledProcessors;
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return EFI_SUCCESS;
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}
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/**
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Gets detailed MP-related information on the requested processor at the
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instant this call is made. This service may only be called from the BSP.
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This service retrieves detailed MP-related information about any processor
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on the platform. Note the following:
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- The processor information may change during the course of a boot session.
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- The information presented here is entirely MP related.
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Information regarding the number of caches and their sizes, frequency of operation,
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slot numbers is all considered platform-related information and is not provided
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by this service.
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@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
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instance.
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@param[in] ProcessorNumber The handle number of processor.
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@param[out] ProcessorInfoBuffer A pointer to the buffer where information for
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the requested processor is deposited.
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@retval EFI_SUCCESS Processor information was returned.
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@retval EFI_DEVICE_ERROR The calling processor is an AP.
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@retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
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@retval EFI_NOT_FOUND The processor with the handle specified by
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ProcessorNumber does not exist in the platform.
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**/
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EFI_STATUS
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EFIAPI
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CpuMpServicesGetProcessorInfo (
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IN EFI_MP_SERVICES_PROTOCOL *This,
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IN UINTN ProcessorNumber,
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OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer
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)
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{
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if (ProcessorInfoBuffer == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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if (!IsBSP ()) {
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return EFI_DEVICE_ERROR;
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}
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if (ProcessorNumber >= gMPSystem.NumberOfProcessors) {
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return EFI_NOT_FOUND;
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}
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CopyMem (ProcessorInfoBuffer, &gMPSystem.ProcessorData[ProcessorNumber], sizeof (EFI_PROCESSOR_INFORMATION));
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return EFI_SUCCESS;
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}
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/**
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This service executes a caller provided function on all enabled APs. APs can
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run either simultaneously or one at a time in sequence. This service supports
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both blocking and non-blocking requests. The non-blocking requests use EFI
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events so the BSP can detect when the APs have finished. This service may only
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be called from the BSP.
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This function is used to dispatch all the enabled APs to the function specified
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by Procedure. If any enabled AP is busy, then EFI_NOT_READY is returned
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immediately and Procedure is not started on any AP.
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If SingleThread is TRUE, all the enabled APs execute the function specified by
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Procedure one by one, in ascending order of processor handle number. Otherwise,
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all the enabled APs execute the function specified by Procedure simultaneously.
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If WaitEvent is NULL, execution is in blocking mode. The BSP waits until all
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APs finish or TimeoutInMicroseconds expires. Otherwise, execution is in non-blocking
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mode, and the BSP returns from this service without waiting for APs. If a
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non-blocking mode is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT
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is signaled, then EFI_UNSUPPORTED must be returned.
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If the timeout specified by TimeoutInMicroseconds expires before all APs return
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from Procedure, then Procedure on the failed APs is terminated. All enabled APs
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are always available for further calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
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and EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). If FailedCpuList is not NULL, its
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content points to the list of processor handle numbers in which Procedure was
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terminated.
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Note: It is the responsibility of the consumer of the EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
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to make sure that the nature of the code that is executed on the BSP and the
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dispatched APs is well controlled. The MP Services Protocol does not guarantee
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that the Procedure function is MP-safe. Hence, the tasks that can be run in
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parallel are limited to certain independent tasks and well-controlled exclusive
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code. EFI services and protocols may not be called by APs unless otherwise
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specified.
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In blocking execution mode, BSP waits until all APs finish or
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TimeoutInMicroseconds expires.
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In non-blocking execution mode, BSP is freed to return to the caller and then
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proceed to the next task without having to wait for APs. The following
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sequence needs to occur in a non-blocking execution mode:
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-# The caller that intends to use this MP Services Protocol in non-blocking
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mode creates WaitEvent by calling the EFI CreateEvent() service. The caller
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invokes EFI_MP_SERVICES_PROTOCOL.StartupAllAPs(). If the parameter WaitEvent
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is not NULL, then StartupAllAPs() executes in non-blocking mode. It requests
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the function specified by Procedure to be started on all the enabled APs,
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and releases the BSP to continue with other tasks.
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-# The caller can use the CheckEvent() and WaitForEvent() services to check
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the state of the WaitEvent created in step 1.
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-# When the APs complete their task or TimeoutInMicroSecondss expires, the MP
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Service signals WaitEvent by calling the EFI SignalEvent() function. If
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FailedCpuList is not NULL, its content is available when WaitEvent is
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signaled. If all APs returned from Procedure prior to the timeout, then
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FailedCpuList is set to NULL. If not all APs return from Procedure before
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the timeout, then FailedCpuList is filled in with the list of the failed
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APs. The buffer is allocated by MP Service Protocol using AllocatePool().
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It is the caller's responsibility to free the buffer with FreePool() service.
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-# This invocation of SignalEvent() function informs the caller that invoked
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EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() that either all the APs completed
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the specified task or a timeout occurred. The contents of FailedCpuList
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can be examined to determine which APs did not complete the specified task
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prior to the timeout.
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@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
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instance.
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@param[in] Procedure A pointer to the function to be run on
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enabled APs of the system. See type
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EFI_AP_PROCEDURE.
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@param[in] SingleThread If TRUE, then all the enabled APs execute
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the function specified by Procedure one by
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one, in ascending order of processor handle
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number. If FALSE, then all the enabled APs
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execute the function specified by Procedure
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simultaneously.
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@param[in] WaitEvent The event created by the caller with CreateEvent()
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service. If it is NULL, then execute in
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blocking mode. BSP waits until all APs finish
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or TimeoutInMicroseconds expires. If it's
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not NULL, then execute in non-blocking mode.
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BSP requests the function specified by
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Procedure to be started on all the enabled
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APs, and go on executing immediately. If
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all return from Procedure, or TimeoutInMicroseconds
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expires, this event is signaled. The BSP
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can use the CheckEvent() or WaitForEvent()
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services to check the state of event. Type
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EFI_EVENT is defined in CreateEvent() in
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the Unified Extensible Firmware Interface
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Specification.
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@param[in] TimeoutInMicrosecsond Indicates the time limit in microseconds for
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APs to return from Procedure, either for
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blocking or non-blocking mode. Zero means
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infinity. If the timeout expires before
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all APs return from Procedure, then Procedure
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on the failed APs is terminated. All enabled
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APs are available for next function assigned
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by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
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or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
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If the timeout expires in blocking mode,
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BSP returns EFI_TIMEOUT. If the timeout
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expires in non-blocking mode, WaitEvent
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is signaled with SignalEvent().
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@param[in] ProcedureArgument The parameter passed into Procedure for
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all APs.
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@param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,
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if all APs finish successfully, then its
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content is set to NULL. If not all APs
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finish before timeout expires, then its
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content is set to address of the buffer
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holding handle numbers of the failed APs.
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The buffer is allocated by MP Service Protocol,
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and it's the caller's responsibility to
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free the buffer with FreePool() service.
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In blocking mode, it is ready for consumption
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when the call returns. In non-blocking mode,
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it is ready when WaitEvent is signaled. The
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list of failed CPU is terminated by
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END_OF_CPU_LIST.
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@retval EFI_SUCCESS In blocking mode, all APs have finished before
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the timeout expired.
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@retval EFI_SUCCESS In non-blocking mode, function has been dispatched
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to all enabled APs.
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@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
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UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
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signaled.
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@retval EFI_DEVICE_ERROR Caller processor is AP.
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@retval EFI_NOT_STARTED No enabled APs exist in the system.
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@retval EFI_NOT_READY Any enabled APs are busy.
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@retval EFI_TIMEOUT In blocking mode, the timeout expired before
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all enabled APs have finished.
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@retval EFI_INVALID_PARAMETER Procedure is NULL.
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**/
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EFI_STATUS
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EFIAPI
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CpuMpServicesStartupAllAps (
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IN EFI_MP_SERVICES_PROTOCOL *This,
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IN EFI_AP_PROCEDURE Procedure,
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IN BOOLEAN SingleThread,
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IN EFI_EVENT WaitEvent OPTIONAL,
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IN UINTN TimeoutInMicroseconds,
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IN VOID *ProcedureArgument OPTIONAL,
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OUT UINTN **FailedCpuList OPTIONAL
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)
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{
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EFI_STATUS Status;
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PROCESSOR_DATA_BLOCK *ProcessorData;
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UINTN Number;
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UINTN NextNumber;
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PROCESSOR_STATE APInitialState;
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PROCESSOR_STATE ProcessorState;
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UINTN Timeout;
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if (!IsBSP ()) {
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return EFI_DEVICE_ERROR;
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}
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if (gMPSystem.NumberOfProcessors == 1) {
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return EFI_NOT_STARTED;
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}
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if (Procedure == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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if ((WaitEvent != NULL) && gReadToBoot) {
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return EFI_UNSUPPORTED;
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}
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for (Number = 0; Number < gMPSystem.NumberOfProcessors; Number++) {
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ProcessorData = &gMPSystem.ProcessorData[Number];
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if ((ProcessorData->Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {
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// Skip BSP
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continue;
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}
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if ((ProcessorData->Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {
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// Skip Disabled processors
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continue;
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}
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gThread->MutexLock(ProcessorData->StateLock);
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if (ProcessorData->State != CPU_STATE_IDLE) {
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gThread->MutexUnlock (ProcessorData->StateLock);
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return EFI_NOT_READY;
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}
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gThread->MutexUnlock(ProcessorData->StateLock);
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}
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if (FailedCpuList != NULL) {
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gMPSystem.FailedList = AllocatePool ((gMPSystem.NumberOfProcessors + 1) * sizeof (UINTN));
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if (gMPSystem.FailedList == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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SetMemN (gMPSystem.FailedList, (gMPSystem.NumberOfProcessors + 1) * sizeof (UINTN), END_OF_CPU_LIST);
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gMPSystem.FailedListIndex = 0;
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*FailedCpuList = gMPSystem.FailedList;
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}
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Timeout = TimeoutInMicroseconds;
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ProcessorData = NULL;
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gMPSystem.FinishCount = 0;
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gMPSystem.StartCount = 0;
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gMPSystem.SingleThread = SingleThread;
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APInitialState = CPU_STATE_READY;
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for (Number = 0; Number < gMPSystem.NumberOfProcessors; Number++) {
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ProcessorData = &gMPSystem.ProcessorData[Number];
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if ((ProcessorData->Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {
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// Skip BSP
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continue;
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}
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if ((ProcessorData->Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {
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// Skip Disabled processors
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gMPSystem.FailedList[gMPSystem.FailedListIndex++] = Number;
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continue;
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}
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//
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// Get APs prepared, and put failing APs into FailedCpuList
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// if "SingleThread", only 1 AP will put to ready state, other AP will be put to ready
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// state 1 by 1, until the previous 1 finished its task
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// if not "SingleThread", all APs are put to ready state from the beginning
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//
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gThread->MutexLock(ProcessorData->StateLock);
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ASSERT (ProcessorData->State == CPU_STATE_IDLE);
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ProcessorData->State = APInitialState;
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gThread->MutexUnlock (ProcessorData->StateLock);
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gMPSystem.StartCount++;
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if (SingleThread) {
|
|
APInitialState = CPU_STATE_BLOCKED;
|
|
}
|
|
}
|
|
|
|
if (WaitEvent != NULL) {
|
|
for (Number = 0; Number < gMPSystem.NumberOfProcessors; Number++) {
|
|
ProcessorData = &gMPSystem.ProcessorData[Number];
|
|
if ((ProcessorData->Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {
|
|
// Skip BSP
|
|
continue;
|
|
}
|
|
|
|
if ((ProcessorData->Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {
|
|
// Skip Disabled processors
|
|
continue;
|
|
}
|
|
|
|
gThread->MutexLock (ProcessorData->StateLock);
|
|
ProcessorState = ProcessorData->State;
|
|
gThread->MutexUnlock (ProcessorData->StateLock);
|
|
|
|
if (ProcessorState == CPU_STATE_READY) {
|
|
SetApProcedure (ProcessorData, Procedure, ProcedureArgument);
|
|
}
|
|
}
|
|
|
|
//
|
|
// Save data into private data structure, and create timer to poll AP state before exiting
|
|
//
|
|
gMPSystem.Procedure = Procedure;
|
|
gMPSystem.ProcedureArgument = ProcedureArgument;
|
|
gMPSystem.WaitEvent = WaitEvent;
|
|
gMPSystem.Timeout = TimeoutInMicroseconds;
|
|
gMPSystem.TimeoutActive = (BOOLEAN)(TimeoutInMicroseconds != 0);
|
|
Status = gBS->SetTimer (
|
|
gMPSystem.CheckAllAPsEvent,
|
|
TimerPeriodic,
|
|
gPollInterval
|
|
);
|
|
return Status;
|
|
|
|
}
|
|
|
|
while (TRUE) {
|
|
for (Number = 0; Number < gMPSystem.NumberOfProcessors; Number++) {
|
|
ProcessorData = &gMPSystem.ProcessorData[Number];
|
|
if ((ProcessorData->Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {
|
|
// Skip BSP
|
|
continue;
|
|
}
|
|
|
|
if ((ProcessorData->Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {
|
|
// Skip Disabled processors
|
|
continue;
|
|
}
|
|
|
|
gThread->MutexLock (ProcessorData->StateLock);
|
|
ProcessorState = ProcessorData->State;
|
|
gThread->MutexUnlock (ProcessorData->StateLock);
|
|
|
|
switch (ProcessorState) {
|
|
case CPU_STATE_READY:
|
|
SetApProcedure (ProcessorData, Procedure, ProcedureArgument);
|
|
break;
|
|
|
|
case CPU_STATE_FINISHED:
|
|
gMPSystem.FinishCount++;
|
|
if (SingleThread) {
|
|
Status = GetNextBlockedNumber (&NextNumber);
|
|
if (!EFI_ERROR (Status)) {
|
|
gThread->MutexLock (gMPSystem.ProcessorData[NextNumber].StateLock);
|
|
gMPSystem.ProcessorData[NextNumber].State = CPU_STATE_READY;
|
|
gThread->MutexUnlock (gMPSystem.ProcessorData[NextNumber].StateLock);
|
|
}
|
|
}
|
|
|
|
gThread->MutexLock (ProcessorData->StateLock);
|
|
ProcessorData->State = CPU_STATE_IDLE;
|
|
gThread->MutexUnlock (ProcessorData->StateLock);
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (gMPSystem.FinishCount == gMPSystem.StartCount) {
|
|
Status = EFI_SUCCESS;
|
|
goto Done;
|
|
}
|
|
|
|
if ((TimeoutInMicroseconds != 0) && (Timeout == 0)) {
|
|
Status = EFI_TIMEOUT;
|
|
goto Done;
|
|
}
|
|
|
|
Timeout -= CalculateAndStallInterval (Timeout);
|
|
}
|
|
|
|
Done:
|
|
if (FailedCpuList != NULL) {
|
|
if (gMPSystem.FailedListIndex == 0) {
|
|
FreePool (*FailedCpuList);
|
|
*FailedCpuList = NULL;
|
|
}
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
This service lets the caller get one enabled AP to execute a caller-provided
|
|
function. The caller can request the BSP to either wait for the completion
|
|
of the AP or just proceed with the next task by using the EFI event mechanism.
|
|
See EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() for more details on non-blocking
|
|
execution support. This service may only be called from the BSP.
|
|
|
|
This function is used to dispatch one enabled AP to the function specified by
|
|
Procedure passing in the argument specified by ProcedureArgument. If WaitEvent
|
|
is NULL, execution is in blocking mode. The BSP waits until the AP finishes or
|
|
TimeoutInMicroSecondss expires. Otherwise, execution is in non-blocking mode.
|
|
BSP proceeds to the next task without waiting for the AP. If a non-blocking mode
|
|
is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled,
|
|
then EFI_UNSUPPORTED must be returned.
|
|
|
|
If the timeout specified by TimeoutInMicroseconds expires before the AP returns
|
|
from Procedure, then execution of Procedure by the AP is terminated. The AP is
|
|
available for subsequent calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() and
|
|
EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
|
|
|
|
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
|
|
instance.
|
|
@param[in] Procedure A pointer to the function to be run on
|
|
enabled APs of the system. See type
|
|
EFI_AP_PROCEDURE.
|
|
@param[in] ProcessorNumber The handle number of the AP. The range is
|
|
from 0 to the total number of logical
|
|
processors minus 1. The total number of
|
|
logical processors can be retrieved by
|
|
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
|
|
@param[in] WaitEvent The event created by the caller with CreateEvent()
|
|
service. If it is NULL, then execute in
|
|
blocking mode. BSP waits until all APs finish
|
|
or TimeoutInMicroseconds expires. If it's
|
|
not NULL, then execute in non-blocking mode.
|
|
BSP requests the function specified by
|
|
Procedure to be started on all the enabled
|
|
APs, and go on executing immediately. If
|
|
all return from Procedure or TimeoutInMicroseconds
|
|
expires, this event is signaled. The BSP
|
|
can use the CheckEvent() or WaitForEvent()
|
|
services to check the state of event. Type
|
|
EFI_EVENT is defined in CreateEvent() in
|
|
the Unified Extensible Firmware Interface
|
|
Specification.
|
|
@param[in] TimeoutInMicrosecsond Indicates the time limit in microseconds for
|
|
APs to return from Procedure, either for
|
|
blocking or non-blocking mode. Zero means
|
|
infinity. If the timeout expires before
|
|
all APs return from Procedure, then Procedure
|
|
on the failed APs is terminated. All enabled
|
|
APs are available for next function assigned
|
|
by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
|
|
or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
|
|
If the timeout expires in blocking mode,
|
|
BSP returns EFI_TIMEOUT. If the timeout
|
|
expires in non-blocking mode, WaitEvent
|
|
is signaled with SignalEvent().
|
|
@param[in] ProcedureArgument The parameter passed into Procedure for
|
|
all APs.
|
|
@param[out] Finished If NULL, this parameter is ignored. In
|
|
blocking mode, this parameter is ignored.
|
|
In non-blocking mode, if AP returns from
|
|
Procedure before the timeout expires, its
|
|
content is set to TRUE. Otherwise, the
|
|
value is set to FALSE. The caller can
|
|
determine if the AP returned from Procedure
|
|
by evaluating this value.
|
|
|
|
@retval EFI_SUCCESS In blocking mode, specified AP finished before
|
|
the timeout expires.
|
|
@retval EFI_SUCCESS In non-blocking mode, the function has been
|
|
dispatched to specified AP.
|
|
@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
|
|
UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
|
|
signaled.
|
|
@retval EFI_DEVICE_ERROR The calling processor is an AP.
|
|
@retval EFI_TIMEOUT In blocking mode, the timeout expired before
|
|
the specified AP has finished.
|
|
@retval EFI_NOT_READY The specified AP is busy.
|
|
@retval EFI_NOT_FOUND The processor with the handle specified by
|
|
ProcessorNumber does not exist.
|
|
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.
|
|
@retval EFI_INVALID_PARAMETER Procedure is NULL.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
CpuMpServicesStartupThisAP (
|
|
IN EFI_MP_SERVICES_PROTOCOL *This,
|
|
IN EFI_AP_PROCEDURE Procedure,
|
|
IN UINTN ProcessorNumber,
|
|
IN EFI_EVENT WaitEvent OPTIONAL,
|
|
IN UINTN TimeoutInMicroseconds,
|
|
IN VOID *ProcedureArgument OPTIONAL,
|
|
OUT BOOLEAN *Finished OPTIONAL
|
|
)
|
|
{
|
|
UINTN Timeout;
|
|
|
|
if (!IsBSP ()) {
|
|
return EFI_DEVICE_ERROR;
|
|
}
|
|
|
|
if (Procedure == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (ProcessorNumber >= gMPSystem.NumberOfProcessors) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
gThread->MutexLock(gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
if (gMPSystem.ProcessorData[ProcessorNumber].State != CPU_STATE_IDLE) {
|
|
gThread->MutexUnlock(gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
return EFI_NOT_READY;
|
|
}
|
|
gThread->MutexUnlock(gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
|
|
if ((WaitEvent != NULL) && gReadToBoot) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
Timeout = TimeoutInMicroseconds;
|
|
|
|
gMPSystem.StartCount = 1;
|
|
gMPSystem.FinishCount = 0;
|
|
|
|
SetApProcedure (&gMPSystem.ProcessorData[ProcessorNumber], Procedure, ProcedureArgument);
|
|
|
|
if (WaitEvent != NULL) {
|
|
// Non Blocking
|
|
gMPSystem.WaitEvent = WaitEvent;
|
|
gBS->SetTimer (
|
|
gMPSystem.ProcessorData[ProcessorNumber].CheckThisAPEvent,
|
|
TimerPeriodic,
|
|
gPollInterval
|
|
);
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
// Blocking
|
|
while (TRUE) {
|
|
gThread->MutexLock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
if (gMPSystem.ProcessorData[ProcessorNumber].State == CPU_STATE_FINISHED) {
|
|
gMPSystem.ProcessorData[ProcessorNumber].State = CPU_STATE_IDLE;
|
|
gThread->MutexUnlock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
break;
|
|
}
|
|
|
|
gThread->MutexUnlock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
|
|
if ((TimeoutInMicroseconds != 0) && (Timeout == 0)) {
|
|
return EFI_TIMEOUT;
|
|
}
|
|
|
|
Timeout -= CalculateAndStallInterval (Timeout);
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
This service switches the requested AP to be the BSP from that point onward.
|
|
This service changes the BSP for all purposes. This call can only be performed
|
|
by the current BSP.
|
|
|
|
This service switches the requested AP to be the BSP from that point onward.
|
|
This service changes the BSP for all purposes. The new BSP can take over the
|
|
execution of the old BSP and continue seamlessly from where the old one left
|
|
off. This service may not be supported after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT
|
|
is signaled.
|
|
|
|
If the BSP cannot be switched prior to the return from this service, then
|
|
EFI_UNSUPPORTED must be returned.
|
|
|
|
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
|
|
@param[in] ProcessorNumber The handle number of AP that is to become the new
|
|
BSP. The range is from 0 to the total number of
|
|
logical processors minus 1. The total number of
|
|
logical processors can be retrieved by
|
|
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
|
|
@param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an
|
|
enabled AP. Otherwise, it will be disabled.
|
|
|
|
@retval EFI_SUCCESS BSP successfully switched.
|
|
@retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to
|
|
this service returning.
|
|
@retval EFI_UNSUPPORTED Switching the BSP is not supported.
|
|
@retval EFI_SUCCESS The calling processor is an AP.
|
|
@retval EFI_NOT_FOUND The processor with the handle specified by
|
|
ProcessorNumber does not exist.
|
|
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or
|
|
a disabled AP.
|
|
@retval EFI_NOT_READY The specified AP is busy.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
CpuMpServicesSwitchBSP (
|
|
IN EFI_MP_SERVICES_PROTOCOL *This,
|
|
IN UINTN ProcessorNumber,
|
|
IN BOOLEAN EnableOldBSP
|
|
)
|
|
{
|
|
UINTN Index;
|
|
|
|
if (!IsBSP ()) {
|
|
return EFI_DEVICE_ERROR;
|
|
}
|
|
|
|
if (ProcessorNumber >= gMPSystem.NumberOfProcessors) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
for (Index = 0; Index < gMPSystem.NumberOfProcessors; Index++) {
|
|
if ((gMPSystem.ProcessorData[Index].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0) {
|
|
break;
|
|
}
|
|
}
|
|
ASSERT (Index != gMPSystem.NumberOfProcessors);
|
|
|
|
gThread->MutexLock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
if (gMPSystem.ProcessorData[ProcessorNumber].State != CPU_STATE_IDLE) {
|
|
gThread->MutexUnlock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
return EFI_NOT_READY;
|
|
}
|
|
gThread->MutexUnlock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
|
|
// Skip for now as we need switch a bunch of stack stuff around and it's complex
|
|
// May not be worth it?
|
|
return EFI_NOT_READY;
|
|
}
|
|
|
|
|
|
/**
|
|
This service lets the caller enable or disable an AP from this point onward.
|
|
This service may only be called from the BSP.
|
|
|
|
This service allows the caller enable or disable an AP from this point onward.
|
|
The caller can optionally specify the health status of the AP by Health. If
|
|
an AP is being disabled, then the state of the disabled AP is implementation
|
|
dependent. If an AP is enabled, then the implementation must guarantee that a
|
|
complete initialization sequence is performed on the AP, so the AP is in a state
|
|
that is compatible with an MP operating system. This service may not be supported
|
|
after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled.
|
|
|
|
If the enable or disable AP operation cannot be completed prior to the return
|
|
from this service, then EFI_UNSUPPORTED must be returned.
|
|
|
|
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
|
|
@param[in] ProcessorNumber The handle number of AP that is to become the new
|
|
BSP. The range is from 0 to the total number of
|
|
logical processors minus 1. The total number of
|
|
logical processors can be retrieved by
|
|
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
|
|
@param[in] EnableAP Specifies the new state for the processor for
|
|
enabled, FALSE for disabled.
|
|
@param[in] HealthFlag If not NULL, a pointer to a value that specifies
|
|
the new health status of the AP. This flag
|
|
corresponds to StatusFlag defined in
|
|
EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only
|
|
the PROCESSOR_HEALTH_STATUS_BIT is used. All other
|
|
bits are ignored. If it is NULL, this parameter
|
|
is ignored.
|
|
|
|
@retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
|
|
@retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed
|
|
prior to this service returning.
|
|
@retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.
|
|
@retval EFI_DEVICE_ERROR The calling processor is an AP.
|
|
@retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber
|
|
does not exist.
|
|
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
CpuMpServicesEnableDisableAP (
|
|
IN EFI_MP_SERVICES_PROTOCOL *This,
|
|
IN UINTN ProcessorNumber,
|
|
IN BOOLEAN EnableAP,
|
|
IN UINT32 *HealthFlag OPTIONAL
|
|
)
|
|
{
|
|
if (!IsBSP ()) {
|
|
return EFI_DEVICE_ERROR;
|
|
}
|
|
|
|
if (ProcessorNumber >= gMPSystem.NumberOfProcessors) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
gThread->MutexLock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
if (gMPSystem.ProcessorData[ProcessorNumber].State != CPU_STATE_IDLE) {
|
|
gThread->MutexUnlock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
gThread->MutexUnlock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);
|
|
|
|
if (EnableAP) {
|
|
if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0 ) {
|
|
gMPSystem.NumberOfEnabledProcessors++;
|
|
}
|
|
gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag |= PROCESSOR_ENABLED_BIT;
|
|
} else {
|
|
if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_ENABLED_BIT) == PROCESSOR_ENABLED_BIT ) {
|
|
gMPSystem.NumberOfEnabledProcessors--;
|
|
}
|
|
gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag &= ~PROCESSOR_ENABLED_BIT;
|
|
}
|
|
|
|
if (HealthFlag != NULL) {
|
|
gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag &= ~PROCESSOR_HEALTH_STATUS_BIT;
|
|
gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag |= (*HealthFlag & PROCESSOR_HEALTH_STATUS_BIT);
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
This return the handle number for the calling processor. This service may be
|
|
called from the BSP and APs.
|
|
|
|
This service returns the processor handle number for the calling processor.
|
|
The returned value is in the range from 0 to the total number of logical
|
|
processors minus 1. The total number of logical processors can be retrieved
|
|
with EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). This service may be
|
|
called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER
|
|
is returned. Otherwise, the current processors handle number is returned in
|
|
ProcessorNumber, and EFI_SUCCESS is returned.
|
|
|
|
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
|
|
@param[in] ProcessorNumber The handle number of AP that is to become the new
|
|
BSP. The range is from 0 to the total number of
|
|
logical processors minus 1. The total number of
|
|
logical processors can be retrieved by
|
|
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
|
|
|
|
@retval EFI_SUCCESS The current processor handle number was returned
|
|
in ProcessorNumber.
|
|
@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
CpuMpServicesWhoAmI (
|
|
IN EFI_MP_SERVICES_PROTOCOL *This,
|
|
OUT UINTN *ProcessorNumber
|
|
)
|
|
{
|
|
UINTN Index;
|
|
UINT64 ProcessorId;
|
|
|
|
if (ProcessorNumber == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
ProcessorId = gThread->Self ();
|
|
for (Index = 0; Index < gMPSystem.NumberOfProcessors; Index++) {
|
|
if (gMPSystem.ProcessorData[Index].Info.ProcessorId == ProcessorId) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
*ProcessorNumber = Index;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
|
|
EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate = {
|
|
CpuMpServicesGetNumberOfProcessors,
|
|
CpuMpServicesGetProcessorInfo,
|
|
CpuMpServicesStartupAllAps,
|
|
CpuMpServicesStartupThisAP,
|
|
CpuMpServicesSwitchBSP,
|
|
CpuMpServicesEnableDisableAP,
|
|
CpuMpServicesWhoAmI
|
|
};
|
|
|
|
|
|
|
|
/*++
|
|
If timeout occurs in StartupAllAps(), a timer is set, which invokes this
|
|
procedure periodically to check whether all APs have finished.
|
|
|
|
|
|
--*/
|
|
VOID
|
|
EFIAPI
|
|
CpuCheckAllAPsStatus (
|
|
IN EFI_EVENT Event,
|
|
IN VOID *Context
|
|
)
|
|
{
|
|
UINTN ProcessorNumber;
|
|
UINTN NextNumber;
|
|
PROCESSOR_DATA_BLOCK *ProcessorData;
|
|
PROCESSOR_DATA_BLOCK *NextData;
|
|
EFI_STATUS Status;
|
|
PROCESSOR_STATE ProcessorState;
|
|
UINTN Cpu;
|
|
BOOLEAN Found;
|
|
|
|
if (gMPSystem.TimeoutActive) {
|
|
gMPSystem.Timeout -= CalculateAndStallInterval (gMPSystem.Timeout);
|
|
}
|
|
|
|
for (ProcessorNumber = 0; ProcessorNumber < gMPSystem.NumberOfProcessors; ProcessorNumber++) {
|
|
ProcessorData = &gMPSystem.ProcessorData[ProcessorNumber];
|
|
if ((ProcessorData->Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {
|
|
// Skip BSP
|
|
continue;
|
|
}
|
|
|
|
if ((ProcessorData->Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {
|
|
// Skip Disabled processors
|
|
continue;
|
|
}
|
|
|
|
// This is an Interrupt Service routine.
|
|
// This can grab a lock that is held in a non-interrupt
|
|
// context. Meaning deadlock. Which is a bad thing.
|
|
// So, try lock it. If we can get it, cool, do our thing.
|
|
// otherwise, just dump out & try again on the next iteration.
|
|
Status = gThread->MutexTryLock (ProcessorData->StateLock);
|
|
if (EFI_ERROR(Status)) {
|
|
return;
|
|
}
|
|
ProcessorState = ProcessorData->State;
|
|
gThread->MutexUnlock (ProcessorData->StateLock);
|
|
|
|
switch (ProcessorState) {
|
|
case CPU_STATE_FINISHED:
|
|
if (gMPSystem.SingleThread) {
|
|
Status = GetNextBlockedNumber (&NextNumber);
|
|
if (!EFI_ERROR (Status)) {
|
|
NextData = &gMPSystem.ProcessorData[NextNumber];
|
|
|
|
gThread->MutexLock (NextData->StateLock);
|
|
NextData->State = CPU_STATE_READY;
|
|
gThread->MutexUnlock (NextData->StateLock);
|
|
|
|
SetApProcedure (NextData, gMPSystem.Procedure, gMPSystem.ProcedureArgument);
|
|
}
|
|
}
|
|
|
|
gThread->MutexLock (ProcessorData->StateLock);
|
|
ProcessorData->State = CPU_STATE_IDLE;
|
|
gThread->MutexUnlock (ProcessorData->StateLock);
|
|
gMPSystem.FinishCount++;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (gMPSystem.TimeoutActive && gMPSystem.Timeout == 0) {
|
|
//
|
|
// Timeout
|
|
//
|
|
if (gMPSystem.FailedList != NULL) {
|
|
for (ProcessorNumber = 0; ProcessorNumber < gMPSystem.NumberOfProcessors; ProcessorNumber++) {
|
|
ProcessorData = &gMPSystem.ProcessorData[ProcessorNumber];
|
|
if ((ProcessorData->Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {
|
|
// Skip BSP
|
|
continue;
|
|
}
|
|
|
|
if ((ProcessorData->Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {
|
|
// Skip Disabled processors
|
|
continue;
|
|
}
|
|
|
|
// Mark the
|
|
Status = gThread->MutexTryLock (ProcessorData->StateLock);
|
|
if (EFI_ERROR(Status)) {
|
|
return;
|
|
}
|
|
ProcessorState = ProcessorData->State;
|
|
gThread->MutexUnlock (ProcessorData->StateLock);
|
|
|
|
if (ProcessorState != CPU_STATE_IDLE) {
|
|
// If we are retrying make sure we don't double count
|
|
for (Cpu = 0, Found = FALSE; Cpu < gMPSystem.NumberOfProcessors; Cpu++) {
|
|
if (gMPSystem.FailedList[Cpu] == END_OF_CPU_LIST) {
|
|
break;
|
|
}
|
|
if (gMPSystem.FailedList[ProcessorNumber] == Cpu) {
|
|
Found = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
if (!Found) {
|
|
gMPSystem.FailedList[gMPSystem.FailedListIndex++] = Cpu;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Force terminal exit
|
|
gMPSystem.FinishCount = gMPSystem.StartCount;
|
|
}
|
|
|
|
if (gMPSystem.FinishCount != gMPSystem.StartCount) {
|
|
return;
|
|
}
|
|
|
|
gBS->SetTimer (
|
|
gMPSystem.CheckAllAPsEvent,
|
|
TimerCancel,
|
|
0
|
|
);
|
|
|
|
if (gMPSystem.FailedListIndex == 0) {
|
|
if (gMPSystem.FailedList != NULL) {
|
|
FreePool (gMPSystem.FailedList);
|
|
gMPSystem.FailedList = NULL;
|
|
}
|
|
}
|
|
|
|
Status = gBS->SignalEvent (gMPSystem.WaitEvent);
|
|
|
|
return ;
|
|
}
|
|
|
|
VOID
|
|
EFIAPI
|
|
CpuCheckThisAPStatus (
|
|
IN EFI_EVENT Event,
|
|
IN VOID *Context
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
PROCESSOR_DATA_BLOCK *ProcessorData;
|
|
PROCESSOR_STATE ProcessorState;
|
|
|
|
ProcessorData = (PROCESSOR_DATA_BLOCK *) Context;
|
|
|
|
//
|
|
// This is an Interrupt Service routine.
|
|
// that can grab a lock that is held in a non-interrupt
|
|
// context. Meaning deadlock. Which is a badddd thing.
|
|
// So, try lock it. If we can get it, cool, do our thing.
|
|
// otherwise, just dump out & try again on the next iteration.
|
|
//
|
|
Status = gThread->MutexTryLock (ProcessorData->StateLock);
|
|
if (EFI_ERROR(Status)) {
|
|
return;
|
|
}
|
|
ProcessorState = ProcessorData->State;
|
|
gThread->MutexUnlock (ProcessorData->StateLock);
|
|
|
|
if (ProcessorState == CPU_STATE_FINISHED) {
|
|
Status = gBS->SetTimer (ProcessorData->CheckThisAPEvent, TimerCancel, 0);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
Status = gBS->SignalEvent (gMPSystem.WaitEvent);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
gThread->MutexLock (ProcessorData->StateLock);
|
|
ProcessorData->State = CPU_STATE_IDLE;
|
|
gThread->MutexUnlock (ProcessorData->StateLock);
|
|
}
|
|
|
|
return ;
|
|
}
|
|
|
|
|
|
/*++
|
|
This function is called by all processors (both BSP and AP) once and collects MP related data
|
|
|
|
MPSystemData - Pointer to the data structure containing MP related data
|
|
BSP - TRUE if the CPU is BSP
|
|
|
|
EFI_SUCCESS - Data for the processor collected and filled in
|
|
|
|
--*/
|
|
EFI_STATUS
|
|
FillInProcessorInformation (
|
|
IN BOOLEAN BSP,
|
|
IN UINTN ProcessorNumber
|
|
)
|
|
{
|
|
gMPSystem.ProcessorData[ProcessorNumber].Info.ProcessorId = gThread->Self ();
|
|
gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag = PROCESSOR_ENABLED_BIT | PROCESSOR_HEALTH_STATUS_BIT;
|
|
if (BSP) {
|
|
gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag |= PROCESSOR_AS_BSP_BIT;
|
|
}
|
|
|
|
gMPSystem.ProcessorData[ProcessorNumber].Info.Location.Package = (UINT32) ProcessorNumber;
|
|
gMPSystem.ProcessorData[ProcessorNumber].Info.Location.Core = 0;
|
|
gMPSystem.ProcessorData[ProcessorNumber].Info.Location.Thread = 0;
|
|
gMPSystem.ProcessorData[ProcessorNumber].State = BSP ? CPU_STATE_BUSY : CPU_STATE_IDLE;
|
|
|
|
gMPSystem.ProcessorData[ProcessorNumber].Procedure = NULL;
|
|
gMPSystem.ProcessorData[ProcessorNumber].Parameter = NULL;
|
|
gMPSystem.ProcessorData[ProcessorNumber].StateLock = gThread->MutexInit ();
|
|
gMPSystem.ProcessorData[ProcessorNumber].ProcedureLock = gThread->MutexInit ();
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
VOID *
|
|
EFIAPI
|
|
CpuDriverApIdolLoop (
|
|
VOID *Context
|
|
)
|
|
{
|
|
EFI_AP_PROCEDURE Procedure;
|
|
VOID *Parameter;
|
|
UINTN ProcessorNumber;
|
|
PROCESSOR_DATA_BLOCK *ProcessorData;
|
|
|
|
ProcessorNumber = (UINTN)Context;
|
|
ProcessorData = &gMPSystem.ProcessorData[ProcessorNumber];
|
|
|
|
ProcessorData->Info.ProcessorId = gThread->Self ();
|
|
|
|
while (TRUE) {
|
|
//
|
|
// Make a local copy on the stack to be extra safe
|
|
//
|
|
gThread->MutexLock (ProcessorData->ProcedureLock);
|
|
Procedure = ProcessorData->Procedure;
|
|
Parameter = ProcessorData->Parameter;
|
|
gThread->MutexUnlock (ProcessorData->ProcedureLock);
|
|
|
|
if (Procedure != NULL) {
|
|
gThread->MutexLock (ProcessorData->StateLock);
|
|
ProcessorData->State = CPU_STATE_BUSY;
|
|
gThread->MutexUnlock (ProcessorData->StateLock);
|
|
|
|
Procedure (Parameter);
|
|
|
|
gThread->MutexLock (ProcessorData->ProcedureLock);
|
|
ProcessorData->Procedure = NULL;
|
|
gThread->MutexUnlock (ProcessorData->ProcedureLock);
|
|
|
|
gThread->MutexLock (ProcessorData->StateLock);
|
|
ProcessorData->State = CPU_STATE_FINISHED;
|
|
gThread->MutexUnlock (ProcessorData->StateLock);
|
|
}
|
|
|
|
// Poll 5 times a seconds, 200ms
|
|
// Don't want to burn too many system resources doing nothing.
|
|
gEmuThunk->Sleep (200 * 1000);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
EFI_STATUS
|
|
InitializeMpSystemData (
|
|
IN UINTN NumberOfProcessors
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
UINTN Index;
|
|
|
|
|
|
//
|
|
// Clear the data structure area first.
|
|
//
|
|
ZeroMem (&gMPSystem, sizeof (MP_SYSTEM_DATA));
|
|
|
|
//
|
|
// First BSP fills and inits all known values, including it's own records.
|
|
//
|
|
gMPSystem.NumberOfProcessors = NumberOfProcessors;
|
|
gMPSystem.NumberOfEnabledProcessors = NumberOfProcessors;
|
|
|
|
gMPSystem.ProcessorData = AllocateZeroPool (gMPSystem.NumberOfProcessors * sizeof (PROCESSOR_DATA_BLOCK));
|
|
ASSERT (gMPSystem.ProcessorData != NULL);
|
|
|
|
FillInProcessorInformation (TRUE, 0);
|
|
|
|
Status = gBS->CreateEvent (
|
|
EVT_TIMER | EVT_NOTIFY_SIGNAL,
|
|
TPL_CALLBACK,
|
|
CpuCheckAllAPsStatus,
|
|
NULL,
|
|
&gMPSystem.CheckAllAPsEvent
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
|
|
for (Index = 0; Index < gMPSystem.NumberOfProcessors; Index++) {
|
|
if ((gMPSystem.ProcessorData[Index].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {
|
|
// Skip BSP
|
|
continue;
|
|
}
|
|
|
|
FillInProcessorInformation (FALSE, Index);
|
|
|
|
Status = gThread->CreateThread (
|
|
(VOID *)&gMPSystem.ProcessorData[Index].Info.ProcessorId,
|
|
NULL,
|
|
CpuDriverApIdolLoop,
|
|
(VOID *)Index
|
|
);
|
|
|
|
|
|
Status = gBS->CreateEvent (
|
|
EVT_TIMER | EVT_NOTIFY_SIGNAL,
|
|
TPL_CALLBACK,
|
|
CpuCheckThisAPStatus,
|
|
(VOID *) &gMPSystem.ProcessorData[Index],
|
|
&gMPSystem.ProcessorData[Index].CheckThisAPEvent
|
|
);
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
Invoke a notification event
|
|
|
|
@param Event Event whose notification function is being invoked.
|
|
@param Context The pointer to the notification function's context,
|
|
which is implementation-dependent.
|
|
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
CpuReadToBootFunction (
|
|
IN EFI_EVENT Event,
|
|
IN VOID *Context
|
|
)
|
|
{
|
|
gReadToBoot = TRUE;
|
|
}
|
|
|
|
|
|
|
|
EFI_STATUS
|
|
CpuMpServicesInit (
|
|
OUT UINTN *MaxCpus
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_HANDLE Handle;
|
|
EMU_IO_THUNK_PROTOCOL *IoThunk;
|
|
|
|
*MaxCpus = 1; // BSP
|
|
IoThunk = GetIoThunkInstance (&gEmuThreadThunkProtocolGuid, 0);
|
|
if (IoThunk != NULL) {
|
|
Status = IoThunk->Open (IoThunk);
|
|
if (!EFI_ERROR (Status)) {
|
|
if (IoThunk->ConfigString != NULL) {
|
|
*MaxCpus += StrDecimalToUintn (IoThunk->ConfigString);
|
|
gThread = IoThunk->Interface;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (*MaxCpus == 1) {
|
|
// We are not MP so nothing to do
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
gPollInterval = (UINTN) PcdGet64 (PcdEmuMpServicesPollingInterval);
|
|
|
|
Status = InitializeMpSystemData (*MaxCpus);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = EfiCreateEventReadyToBootEx (TPL_CALLBACK, CpuReadToBootFunction, NULL, &gReadToBootEvent);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// Now install the MP services protocol.
|
|
//
|
|
Handle = NULL;
|
|
Status = gBS->InstallMultipleProtocolInterfaces (
|
|
&Handle,
|
|
&gEfiMpServiceProtocolGuid, &mMpServicesTemplate,
|
|
NULL
|
|
);
|
|
return Status;
|
|
}
|
|
|
|
|