Can't Read Data from Custom componet (Avalon mm)

In our design we have included a custom component into the SOPC design. The custom component (IMM, instance IMM_x) is connected to the write master port of a DMA. The DMA reads data from data_memory which is different from program_memory. Here is the definition of the custom component as seen in system.h

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# define __IMM

/*

* IMM_x configuration

*

*/

# define ALT_MODULE_CLASS_IMM_x IMM# define IMM_X_BASE 0x0# define IMM_X_IRQ -1# define IMM_X_IRQ_INTERRUPT_CONTROLLER_ID -1# define IMM_X_NAME "/dev/IMM_x"# define IMM_X_SPAN 536870912# define IMM_X_TYPE "IMM"

/*

* IMM_x configuration as viewed by DMA_x_write_master

*

*/

# define DMA_X_WRITE_MASTER_IMM_X_BASE 0x0# define DMA_X_WRITE_MASTER_IMM_X_IRQ -1# define DMA_X_WRITE_MASTER_IMM_X_IRQ_INTERRUPT_CONTROLLER_ID -1# define DMA_X_WRITE_MASTER_IMM_X_NAME "/dev/IMM_x"# define DMA_X_WRITE_MASTER_IMM_X_SPAN 536870912# define DMA_X_WRITE_MASTER_IMM_X_TYPE "IMM"

--- Quote End ---

Can somebody tell me, how can I program it in C. I mean how should I configure the DMA to write to IMM_x. Thanks