ArmGicDParser.c

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#include <Library/BaseMemoryLib.h>
#include "CmObjectDescUtility.h"
#include "FdtHwInfoParser.h"
#include "Arm/Gic/ArmGicDispatcher.h"
#include "Arm/Gic/ArmGicDParser.h"
 
STATIC
EFI_STATUS
EFIAPI
GicDIntcNodeParser (
  IN  CONST VOID        *Fdt,
  IN  INT32             GicIntcNode,
  IN  CM_ARM_GICD_INFO  *GicDInfo
  )
{
  EFI_STATUS   Status;
  INT32        AddressCells;
  CONST UINT8  *Data;
  INT32        DataSize;
 
  if ((Fdt == NULL) ||
      (GicDInfo == NULL))
  {
    ASSERT (0);
    return EFI_INVALID_PARAMETER;
  }
 
  Status = FdtGetParentAddressInfo (Fdt, GicIntcNode, &AddressCells, NULL);
  if (EFI_ERROR (Status)) {
    ASSERT (0);
    return Status;
  }
 
  // Don't support more than 64 bits and less than 32 bits addresses.
  if ((AddressCells < 1)  ||
      (AddressCells > 2))
  {
    ASSERT (0);
    return EFI_ABORTED;
  }
 
  Data = fdt_getprop (Fdt, GicIntcNode, "reg", &DataSize);
  if ((Data == NULL) || (DataSize < (INT32)(AddressCells * sizeof (UINT32)))) {
    // If error or not enough space.
    ASSERT (0);
    return EFI_ABORTED;
  }
 
  if (AddressCells == 2) {
    GicDInfo->PhysicalBaseAddress = fdt64_to_cpu (*(UINT64 *)Data);
  } else {
    GicDInfo->PhysicalBaseAddress = fdt32_to_cpu (*(UINT32 *)Data);
  }
 
  return Status;
}
 
EFI_STATUS
EFIAPI
ArmGicDInfoParser (
  IN  CONST FDT_HW_INFO_PARSER_HANDLE  FdtParserHandle,
  IN        INT32                      FdtBranch
  )
{
  EFI_STATUS        Status;
  UINT32            GicVersion;
  CM_ARM_GICD_INFO  GicDInfo;
  VOID              *Fdt;
 
  if (FdtParserHandle == NULL) {
    ASSERT (0);
    return EFI_INVALID_PARAMETER;
  }
 
  Fdt = FdtParserHandle->Fdt;
 
  if (!FdtNodeHasProperty (Fdt, FdtBranch, "interrupt-controller")) {
    ASSERT (0);
    return EFI_INVALID_PARAMETER;
  }
 
  // Get the Gic version of the interrupt-controller.
  Status = GetGicVersion (Fdt, FdtBranch, &GicVersion);
  if (EFI_ERROR (Status)) {
    ASSERT (0);
    return Status;
  }
 
  ZeroMem (&GicDInfo, sizeof (GicDInfo));
  GicDInfo.GicVersion = GicVersion;
 
  // Parse the interrupt-controller depending on its Gic version.
  switch (GicVersion) {
    case 2:
    case 3:
    {
      // Set the Gic version, then parse the GicD information.
      Status = GicDIntcNodeParser (Fdt, FdtBranch, &GicDInfo);
      break;
    }
    default:
    {
      // Unsupported Gic version.
      ASSERT (0);
      return EFI_UNSUPPORTED;
    }
  }
 
  // Add the CmObj to the Configuration Manager.
  Status = AddSingleCmObj (
             FdtParserHandle,
             CREATE_CM_ARM_OBJECT_ID (EArmObjGicDInfo),
             &GicDInfo,
             sizeof (CM_ARM_GICD_INFO),
             NULL
             );
  ASSERT_EFI_ERROR (Status);
  return Status;
}