Mapping registers of SPI controller from DSP side

Hi, 

Is it possible to read/write SPI registers from DSP side? 

I try to read SPI revision register at dm3730 by flowing way:

#define REG_READ(REGBASE, OFFSET) \

( *( ( volatile Int32* )( (REGBASE) + (OFFSET) ) ) )

...

DSP_DRV_DEBUG( "McSPI 0x%08X\r\n", REG_READ( 0x480B8000, 0 ));

This define call returns random value, some addresses instead of register value.

But exactly the same macros reads GPIO registers without any problems. Like this:

DSP_DRV_DEBUG( "GPIO1 0x%08X\r\n", REG_READ( 0x48310000, 0 ));

I compile my application with DSPLink and use it to send reg value to the GPP (WinCE).

Should I configure MMU or do something else to get access to the SPI?

Thanks.