SpiHcSmm.c

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#include <Base.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Library/UefiLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/MmServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/SpiHcPlatformLib.h>
#include <Protocol/SpiSmmHc.h>
#include <IndustryStandard/SpiNorFlashJedecSfdp.h>
#include "SpiHc.h"
 
EFI_HANDLE  mSpiHcHandle = 0;
 
EFI_STATUS
EFIAPI
SpiHcProtocolEntry (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS           Status;
  EFI_SPI_HC_PROTOCOL  *HcProtocol;
 
  DEBUG ((DEBUG_VERBOSE, "%a - ENTRY\n", __func__));
 
  // Allocate the SPI Host Controller protocol
  HcProtocol = AllocateZeroPool (sizeof (EFI_SPI_HC_PROTOCOL));
  ASSERT (HcProtocol != NULL);
  if (HcProtocol == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }
 
  // Fill in the SPI Host Controller Protocol
  Status = GetPlatformSpiHcDetails (
             &HcProtocol->Attributes,
             &HcProtocol->FrameSizeSupportMask,
             &HcProtocol->MaximumTransferBytes
             );
 
  HcProtocol->ChipSelect  = ChipSelect;
  HcProtocol->Clock       = Clock;
  HcProtocol->Transaction = Transaction;
 
  Status = gMmst->MmInstallProtocolInterface (
                    &mSpiHcHandle,
                    &gEfiSpiSmmHcProtocolGuid,
                    EFI_NATIVE_INTERFACE,
                    HcProtocol
                    );
 
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_VERBOSE, "Error installing gEfiSpiSmmHcProtocolGuid\n"));
  }
 
  DEBUG ((DEBUG_VERBOSE, "%a - EXIT Status=%r\n", __func__, Status));
 
  return Status;
}