CreateHobList.c

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#include <PiMm.h>
 
#include <PiPei.h>
#include <Guid/MmramMemoryReserve.h>
#include <Guid/MpInformation.h>
 
#include <StandaloneMmCpu.h>
#include <Library/Arm/StandaloneMmCoreEntryPoint.h>
#include <Library/ArmMmuLib.h>
#include <Library/ArmSvcLib.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/SerialPortLib.h>
 
#include <IndustryStandard/ArmStdSmc.h>
 
extern EFI_HOB_HANDOFF_INFO_TABLE *
HobConstructor (
  IN VOID   *EfiMemoryBegin,
  IN UINTN  EfiMemoryLength,
  IN VOID   *EfiFreeMemoryBottom,
  IN VOID   *EfiFreeMemoryTop
  );
 
// GUID to identify HOB with whereabouts of communication buffer with Normal
// World
extern EFI_GUID  gEfiStandaloneMmNonSecureBufferGuid;
 
// GUID to identify HOB where the entry point of the CPU driver will be
// populated to allow this entry point driver to invoke it upon receipt of an
// event
extern EFI_GUID  gEfiMmCpuDriverEpDescriptorGuid;
 
VOID *
CreateHobListFromBootInfo (
  IN  OUT  PI_MM_CPU_DRIVER_ENTRYPOINT     *CpuDriverEntryPoint,
  IN       EFI_SECURE_PARTITION_BOOT_INFO  *PayloadBootInfo
  )
{
  EFI_HOB_HANDOFF_INFO_TABLE      *HobStart;
  EFI_RESOURCE_ATTRIBUTE_TYPE     Attributes;
  UINT32                          Index;
  UINT32                          BufferSize;
  UINT32                          Flags;
  EFI_MMRAM_HOB_DESCRIPTOR_BLOCK  *MmramRangesHob;
  EFI_MMRAM_DESCRIPTOR            *MmramRanges;
  EFI_MMRAM_DESCRIPTOR            *NsCommBufMmramRange;
  MP_INFORMATION_HOB_DATA         *MpInformationHobData;
  EFI_PROCESSOR_INFORMATION       *ProcInfoBuffer;
  EFI_SECURE_PARTITION_CPU_INFO   *CpuInfo;
  MM_CPU_DRIVER_EP_DESCRIPTOR     *CpuDriverEntryPointDesc;
 
  // Create a hoblist with a PHIT and EOH
  HobStart = HobConstructor (
               (VOID *)(UINTN)PayloadBootInfo->SpMemBase,
               (UINTN)PayloadBootInfo->SpMemLimit - PayloadBootInfo->SpMemBase,
               (VOID *)(UINTN)PayloadBootInfo->SpHeapBase,
               (VOID *)(UINTN)(PayloadBootInfo->SpHeapBase + PayloadBootInfo->SpHeapSize)
               );
 
  // Check that the Hoblist starts at the bottom of the Heap
  ASSERT (HobStart == (VOID *)(UINTN)PayloadBootInfo->SpHeapBase);
 
  // Build a Boot Firmware Volume HOB
  BuildFvHob (PayloadBootInfo->SpImageBase, PayloadBootInfo->SpImageSize);
 
  // Build a resource descriptor Hob that describes the available physical
  // memory range
  Attributes = (
                EFI_RESOURCE_ATTRIBUTE_PRESENT |
                EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
                EFI_RESOURCE_ATTRIBUTE_TESTED |
                EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
                EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
                EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
                EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE
                );
 
  BuildResourceDescriptorHob (
    EFI_RESOURCE_SYSTEM_MEMORY,
    Attributes,
    (UINTN)PayloadBootInfo->SpMemBase,
    PayloadBootInfo->SpMemLimit - PayloadBootInfo->SpMemBase
    );
 
  // Find the size of the GUIDed HOB with MP information
  BufferSize  = sizeof (MP_INFORMATION_HOB_DATA);
  BufferSize += sizeof (EFI_PROCESSOR_INFORMATION) * PayloadBootInfo->NumCpus;
 
  // Create a Guided MP information HOB to enable the ARM TF CPU driver to
  // perform per-cpu allocations.
  MpInformationHobData = BuildGuidHob (&gMpInformationHobGuid, BufferSize);
 
  // Populate the MP information HOB with the topology information passed by
  // privileged firmware
  MpInformationHobData->NumberOfProcessors        = PayloadBootInfo->NumCpus;
  MpInformationHobData->NumberOfEnabledProcessors = PayloadBootInfo->NumCpus;
  ProcInfoBuffer                                  = MpInformationHobData->ProcessorInfoBuffer;
  CpuInfo                                         = PayloadBootInfo->CpuInfo;
 
  for (Index = 0; Index < PayloadBootInfo->NumCpus; Index++) {
    ProcInfoBuffer[Index].ProcessorId      = CpuInfo[Index].Mpidr;
    ProcInfoBuffer[Index].Location.Package = GET_CLUSTER_ID (CpuInfo[Index].Mpidr);
    ProcInfoBuffer[Index].Location.Core    = GET_CORE_ID (CpuInfo[Index].Mpidr);
    ProcInfoBuffer[Index].Location.Thread  = GET_CORE_ID (CpuInfo[Index].Mpidr);
 
    Flags = PROCESSOR_ENABLED_BIT | PROCESSOR_HEALTH_STATUS_BIT;
    if (CpuInfo[Index].Flags & CPU_INFO_FLAG_PRIMARY_CPU) {
      Flags |= PROCESSOR_AS_BSP_BIT;
    }
 
    ProcInfoBuffer[Index].StatusFlag = Flags;
  }
 
  // Create a Guided HOB to tell the ARM TF CPU driver the location and length
  // of the communication buffer shared with the Normal world.
  NsCommBufMmramRange = (EFI_MMRAM_DESCRIPTOR *)BuildGuidHob (
                                                  &gEfiStandaloneMmNonSecureBufferGuid,
                                                  sizeof (EFI_MMRAM_DESCRIPTOR)
                                                  );
  NsCommBufMmramRange->PhysicalStart = PayloadBootInfo->SpNsCommBufBase;
  NsCommBufMmramRange->CpuStart      = PayloadBootInfo->SpNsCommBufBase;
  NsCommBufMmramRange->PhysicalSize  = PayloadBootInfo->SpNsCommBufSize;
  NsCommBufMmramRange->RegionState   = EFI_CACHEABLE | EFI_ALLOCATED;
 
  // Create a Guided HOB to enable the ARM TF CPU driver to share its entry
  // point and populate it with the address of the shared buffer
  CpuDriverEntryPointDesc = (MM_CPU_DRIVER_EP_DESCRIPTOR *)BuildGuidHob (
                                                             &gEfiMmCpuDriverEpDescriptorGuid,
                                                             sizeof (MM_CPU_DRIVER_EP_DESCRIPTOR)
                                                             );
 
  *CpuDriverEntryPoint                      = NULL;
  CpuDriverEntryPointDesc->MmCpuDriverEpPtr = CpuDriverEntryPoint;
 
  // Find the size of the GUIDed HOB with SRAM ranges
  BufferSize  = sizeof (EFI_MMRAM_HOB_DESCRIPTOR_BLOCK);
  BufferSize += PayloadBootInfo->NumSpMemRegions * sizeof (EFI_MMRAM_DESCRIPTOR);
 
  // Create a GUIDed HOB with SRAM ranges
  MmramRangesHob = BuildGuidHob (&gEfiMmPeiMmramMemoryReserveGuid, BufferSize);
 
  // Fill up the number of MMRAM memory regions
  MmramRangesHob->NumberOfMmReservedRegions = PayloadBootInfo->NumSpMemRegions;
  // Fill up the MMRAM ranges
  MmramRanges = &MmramRangesHob->Descriptor[0];
 
  // Base and size of memory occupied by the Standalone MM image
  MmramRanges[0].PhysicalStart = PayloadBootInfo->SpImageBase;
  MmramRanges[0].CpuStart      = PayloadBootInfo->SpImageBase;
  MmramRanges[0].PhysicalSize  = PayloadBootInfo->SpImageSize;
  MmramRanges[0].RegionState   = EFI_CACHEABLE | EFI_ALLOCATED;
 
  // Base and size of buffer shared with privileged Secure world software
  MmramRanges[1].PhysicalStart = PayloadBootInfo->SpSharedBufBase;
  MmramRanges[1].CpuStart      = PayloadBootInfo->SpSharedBufBase;
  MmramRanges[1].PhysicalSize  = PayloadBootInfo->SpSharedBufSize;
  MmramRanges[1].RegionState   = EFI_CACHEABLE | EFI_ALLOCATED;
 
  // Base and size of buffer used for synchronous communication with Normal
  // world software
  MmramRanges[2].PhysicalStart = PayloadBootInfo->SpNsCommBufBase;
  MmramRanges[2].CpuStart      = PayloadBootInfo->SpNsCommBufBase;
  MmramRanges[2].PhysicalSize  = PayloadBootInfo->SpNsCommBufSize;
  MmramRanges[2].RegionState   = EFI_CACHEABLE | EFI_ALLOCATED;
 
  // Base and size of memory allocated for stacks for all cpus
  MmramRanges[3].PhysicalStart = PayloadBootInfo->SpStackBase;
  MmramRanges[3].CpuStart      = PayloadBootInfo->SpStackBase;
  MmramRanges[3].PhysicalSize  = PayloadBootInfo->SpPcpuStackSize * PayloadBootInfo->NumCpus;
  MmramRanges[3].RegionState   = EFI_CACHEABLE | EFI_ALLOCATED;
 
  // Base and size of heap memory shared by all cpus
  MmramRanges[4].PhysicalStart = (EFI_PHYSICAL_ADDRESS)(UINTN)HobStart;
  MmramRanges[4].CpuStart      = (EFI_PHYSICAL_ADDRESS)(UINTN)HobStart;
  MmramRanges[4].PhysicalSize  = HobStart->EfiFreeMemoryBottom - (EFI_PHYSICAL_ADDRESS)(UINTN)HobStart;
  MmramRanges[4].RegionState   = EFI_CACHEABLE | EFI_ALLOCATED;
 
  // Base and size of heap memory shared by all cpus
  MmramRanges[5].PhysicalStart = HobStart->EfiFreeMemoryBottom;
  MmramRanges[5].CpuStart      = HobStart->EfiFreeMemoryBottom;
  MmramRanges[5].PhysicalSize  = HobStart->EfiFreeMemoryTop - HobStart->EfiFreeMemoryBottom;
  MmramRanges[5].RegionState   = EFI_CACHEABLE;
 
  return HobStart;
}