Reading and writing to the system ram from device driver

I have got 0x96000 memory allocated in system ram for audio data.
To read and write I used ioremap, Which while reading back getting
wrong values.

DO I need to use different api's for mapping such a huge physical memory
and acess them in the driver.

ioremap is used for bus memory - memory on adapters that must be accessed through io instructions like readb or writeb. System RAM doesn't use or need this.