mirror of https://github.com/acidanthera/audk.git
UefiCpuPkg/CpuMpPei: Implementation of PeiGetProcessorInfo ()
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeff Fan <jeff.fan@intel.com> Reviewed-by: Feng Tian <feng.tian@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18007 6f19259b-4bc3-4df7-8a09-765794883524
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Jeff Fan
vanjeff
parent
a2cc8caead
commit
bf55f5b274
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@ -15,6 +15,115 @@
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#include "PeiMpServices.h"
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/**
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Get CPU Package/Core/Thread location information.
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@param InitialApicId CPU APIC ID
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@param Location Pointer to CPU location information
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**/
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VOID
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ExtractProcessorLocation (
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IN UINT32 InitialApicId,
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OUT EFI_CPU_PHYSICAL_LOCATION *Location
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)
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{
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BOOLEAN TopologyLeafSupported;
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UINTN ThreadBits;
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UINTN CoreBits;
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UINT32 RegEax;
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UINT32 RegEbx;
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UINT32 RegEcx;
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UINT32 RegEdx;
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UINT32 MaxCpuIdIndex;
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UINT32 SubIndex;
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UINTN LevelType;
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UINT32 MaxLogicProcessorsPerPackage;
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UINT32 MaxCoresPerPackage;
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//
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// Check if the processor is capable of supporting more than one logical processor.
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//
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AsmCpuid (CPUID_VERSION_INFO, NULL, NULL, NULL, &RegEdx);
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if ((RegEdx & BIT28) == 0) {
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Location->Thread = 0;
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Location->Core = 0;
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Location->Package = 0;
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return;
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}
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ThreadBits = 0;
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CoreBits = 0;
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//
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// Assume three-level mapping of APIC ID: Package:Core:SMT.
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//
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TopologyLeafSupported = FALSE;
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//
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// Get the max index of basic CPUID
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//
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AsmCpuid (CPUID_SIGNATURE, &MaxCpuIdIndex, NULL, NULL, NULL);
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//
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// If the extended topology enumeration leaf is available, it
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// is the preferred mechanism for enumerating topology.
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//
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if (MaxCpuIdIndex >= CPUID_EXTENDED_TOPOLOGY) {
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AsmCpuidEx (CPUID_EXTENDED_TOPOLOGY, 0, &RegEax, &RegEbx, &RegEcx, NULL);
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//
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// If CPUID.(EAX=0BH, ECX=0H):EBX returns zero and maximum input value for
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// basic CPUID information is greater than 0BH, then CPUID.0BH leaf is not
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// supported on that processor.
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//
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if (RegEbx != 0) {
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TopologyLeafSupported = TRUE;
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//
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// Sub-leaf index 0 (ECX= 0 as input) provides enumeration parameters to extract
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// the SMT sub-field of x2APIC ID.
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//
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LevelType = (RegEcx >> 8) & 0xff;
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ASSERT (LevelType == CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_SMT);
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ThreadBits = RegEax & 0x1f;
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//
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// Software must not assume any "level type" encoding
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// value to be related to any sub-leaf index, except sub-leaf 0.
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//
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SubIndex = 1;
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do {
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AsmCpuidEx (CPUID_EXTENDED_TOPOLOGY, SubIndex, &RegEax, NULL, &RegEcx, NULL);
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LevelType = (RegEcx >> 8) & 0xff;
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if (LevelType == CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_CORE) {
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CoreBits = (RegEax & 0x1f) - ThreadBits;
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break;
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}
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SubIndex++;
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} while (LevelType != CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_INVALID);
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}
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}
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if (!TopologyLeafSupported) {
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AsmCpuid (CPUID_VERSION_INFO, NULL, &RegEbx, NULL, NULL);
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MaxLogicProcessorsPerPackage = (RegEbx >> 16) & 0xff;
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if (MaxCpuIdIndex >= CPUID_CACHE_PARAMS) {
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AsmCpuidEx (CPUID_CACHE_PARAMS, 0, &RegEax, NULL, NULL, NULL);
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MaxCoresPerPackage = (RegEax >> 26) + 1;
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} else {
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//
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// Must be a single-core processor.
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//
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MaxCoresPerPackage = 1;
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}
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ThreadBits = (UINTN) (HighBitSet32 (MaxLogicProcessorsPerPackage / MaxCoresPerPackage - 1) + 1);
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CoreBits = (UINTN) (HighBitSet32 (MaxCoresPerPackage - 1) + 1);
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}
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Location->Thread = InitialApicId & ~((-1) << ThreadBits);
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Location->Core = (InitialApicId >> ThreadBits) & ~((-1) << CoreBits);
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Location->Package = (InitialApicId >> (ThreadBits + CoreBits));
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}
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/**
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Find the current Processor number by APIC ID.
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@ -124,6 +233,87 @@ PeiGetNumberOfProcessors (
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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] PeiServices An indirect pointer to the PEI Services Table
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published by the PEI Foundation.
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@param[in] This Pointer to this instance of the PPI.
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@param[in] ProcessorNumber Pointer to the total number of logical processors in
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the system, including the BSP and disabled APs.
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@param[out] ProcessorInfoBuffer Number of processors in the system that are enabled.
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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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PeiGetProcessorInfo (
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IN CONST EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_MP_SERVICES_PPI *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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PEI_CPU_MP_DATA *PeiCpuMpData;
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UINTN CallerNumber;
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PeiCpuMpData = GetMpHobData ();
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if (PeiCpuMpData == NULL) {
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return EFI_NOT_FOUND;
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}
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//
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// Check whether caller processor is BSP
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//
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PeiWhoAmI (PeiServices, This, &CallerNumber);
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if (CallerNumber != PeiCpuMpData->BspNumber) {
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return EFI_DEVICE_ERROR;
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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 (ProcessorNumber >= PeiCpuMpData->CpuCount) {
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return EFI_NOT_FOUND;
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}
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ProcessorInfoBuffer->ProcessorId = (UINT64) PeiCpuMpData->CpuData[ProcessorNumber].ApicId;
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ProcessorInfoBuffer->StatusFlag = 0;
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if (PeiCpuMpData->CpuData[ProcessorNumber].ApicId == GetInitialApicId()) {
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ProcessorInfoBuffer->StatusFlag |= PROCESSOR_AS_BSP_BIT;
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}
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if (PeiCpuMpData->CpuData[ProcessorNumber].Health.Uint32 == 0) {
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ProcessorInfoBuffer->StatusFlag |= PROCESSOR_HEALTH_STATUS_BIT;
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}
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if (PeiCpuMpData->CpuData[ProcessorNumber].State == CpuStateDisabled) {
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ProcessorInfoBuffer->StatusFlag &= ~PROCESSOR_ENABLED_BIT;
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} else {
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ProcessorInfoBuffer->StatusFlag |= PROCESSOR_ENABLED_BIT;
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}
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//
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// Get processor location information
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//
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ExtractProcessorLocation (PeiCpuMpData->CpuData[ProcessorNumber].ApicId, &ProcessorInfoBuffer->Location);
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return EFI_SUCCESS;
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}
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/**
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This return the handle number for the calling processor. This service may be
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called from the BSP and APs.
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@ -60,6 +60,41 @@ PeiGetNumberOfProcessors (
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OUT UINTN *NumberOfEnabledProcessors
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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] PeiServices An indirect pointer to the PEI Services Table
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published by the PEI Foundation.
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@param[in] This Pointer to this instance of the PPI.
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@param[in] ProcessorNumber Pointer to the total number of logical processors in
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the system, including the BSP and disabled APs.
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@param[out] ProcessorInfoBuffer Number of processors in the system that are enabled.
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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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PeiGetProcessorInfo (
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IN CONST EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_MP_SERVICES_PPI *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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This return the handle number for the calling processor. This service may be
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