C++ (Cpp) FOLD_32BIT_INTO_16BIT Exemples

Exemple #1

Fichier : NorFlashDxe.c Projet : Cutty/edk2

BOOLEAN
NorFlashBlockIsLocked (
    IN NOR_FLASH_INSTANCE     *Instance,
    IN UINTN                  BlockAddress
)
{
    UINT32                LockStatus;
    BOOLEAN               BlockIsLocked;

    BlockIsLocked = TRUE;

    // Send command for reading device id
    SEND_NOR_COMMAND (BlockAddress, 2, P30_CMD_READ_DEVICE_ID);

    // Read block lock status
    LockStatus = MmioRead32 (CREATE_NOR_ADDRESS(BlockAddress, 2));

    // Decode block lock status
    LockStatus = FOLD_32BIT_INTO_16BIT(LockStatus);

    if ((LockStatus & 0x2) != 0) {
        DEBUG((EFI_D_ERROR, "NorFlashBlockIsLocked: WARNING: Block LOCKED DOWN\n"));
    }

    if ((LockStatus & 0x1) == 0) {
        // This means the block is unlocked
        DEBUG((DEBUG_BLKIO, "UnlockSingleBlock: Block 0x%08x unlocked\n", BlockAddress));
        BlockIsLocked = FALSE;
    }

    return BlockIsLocked;
}

Exemple #2

Fichier : NorFlashDxe.c Projet : jian-tian/UEFI

STATIC
EFI_STATUS
NorFlashUnlockSingleBlock (
  IN NOR_FLASH_INSTANCE     *Instance,
  IN UINTN                  BlockAddress
  )
{
  UINT32                LockStatus;

  // Raise the Task Priority Level to TPL_NOTIFY to serialise all its operations
  // and to protect shared data structures.

  if (FeaturePcdGet (PcdNorFlashCheckBlockLocked) == TRUE) {
    do {
      // Request a lock setup
      SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_LOCK_BLOCK_SETUP);

      // Request an unlock
      SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_UNLOCK_BLOCK);

      // Send command for reading device id
      SEND_NOR_COMMAND (BlockAddress, 2, P30_CMD_READ_DEVICE_ID);

      // Read block lock status
      LockStatus = MmioRead32 (CREATE_NOR_ADDRESS(BlockAddress, 2));

      // Decode block lock status
      LockStatus = FOLD_32BIT_INTO_16BIT(LockStatus);
    } while ((LockStatus & 0x1) == 1);
  } else {
    // Request a lock setup
    SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_LOCK_BLOCK_SETUP);

    // Request an unlock
    SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_UNLOCK_BLOCK);

    // Wait until the status register gives us the all clear
    do {
      LockStatus = NorFlashReadStatusRegister (Instance, BlockAddress);
    } while ((LockStatus & P30_SR_BIT_WRITE) != P30_SR_BIT_WRITE);
  }

  // Put device back into Read Array mode
  SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_READ_ARRAY);

  DEBUG((DEBUG_BLKIO, "UnlockSingleBlock: BlockAddress=0x%08x\n", BlockAddress));

  return EFI_SUCCESS;
}

Exemple #3

Fichier : NorFlashDxe.c Projet : jian-tian/UEFI

STATIC
BOOLEAN
NorFlashBlockIsLocked (
  IN NOR_FLASH_INSTANCE     *Instance,
  IN UINTN                  BlockAddress
  )
{
  UINT32                LockStatus;

  // Send command for reading device id
  SEND_NOR_COMMAND (BlockAddress, 2, P30_CMD_READ_DEVICE_ID);

  // Read block lock status
  LockStatus = MmioRead32 (CREATE_NOR_ADDRESS(BlockAddress, 2));

  // Decode block lock status
  LockStatus = FOLD_32BIT_INTO_16BIT(LockStatus);

  if ((LockStatus & 0x2) != 0) {
    DEBUG((EFI_D_ERROR, "NorFlashBlockIsLocked: WARNING: Block LOCKED DOWN\n"));
  }

  return ((LockStatus & 0x1) != 0);
}