# OS_GetDTCMParam

## C Specification

      #include <nitro/os.h>

      u32 OS_GetDTCMParam( void );

## Arguments

None.

## Return Values

Data TCM Parameter.

## Description

Gets the Data TCM parameter This parameter contains the Data TCM base address and effective area size. You can mask with `HW_C9_TCMR_SIZE_MASK` to obtain the value that shows area size.
You can mask with `HW_C9_TCMR_BASE_MASK` to obtain the base address.

The correspondence between the area size parameter and the actual size is shown below:

HW_C9_TCMR_4KB | 4 Kilobytes
HW_C9_TCMR_8KB | 8KByte
HW_C9_TCMR_16KB | 16KByte
HW_C9_TCMR_32KB | 32KByte
HW_C9_TCMR_64KB | 64KByte
HW_C9_TCMR_128KB | 128KByte
HW_C9_TCMR_256KB | 256KByte
HW_C9_TCMR_512KB | 512KByte
HW_C9_TCMR_1MB | 1MByte
HW_C9_TCMR_2MB | 2MByte
HW_C9_TCMR_4MB | 4MByte
HW_C9_TCMR_8MB | 8MByte
HW_C9_TCMR_16MB | 16MByte
HW_C9_TCMR_32MB | 32MByte
HW_C9_TCMR_64MB | 64MByte
HW_C9_TCMR_128MB | 128MByte
HW_C9_TCMR_256MB | 256MByte
HW_C9_TCMR_512MB | 512MByte
HW_C9_TCMR_1GB | 1GByte
HW_C9_TCMR_2GB | 2GByte
HW_C9_TCMR_4GB | 4GByte

## Internal Operation

Modifies register 9 of the system control co-processor CP15.

## See Also

`OS_SetDTCMParam
`

## Revision History

01/15/2004 Initial Version