OCP tables

["jhoney jhoney" <jhoney_joney@xxxxxxxxxxxxxx>]

Hello All,

Thanks for your mails. Presently I set to write a driver for DMA , I am following ethernet driver (gianfar.c for gigabit ethernet) and I2C driver present for MPC8540. I came across
/* Update the 8540 OCP tables paddr field */
mpc8540_update_ocp(binfo->bi_immr_base)
{
struct ocp_def *def;
def = ocp_get_one_device(OCP_VENDOR_MOTOROLA, OCP_FUNC_DMA, 0);
        if (def)
                def->paddr += ccsrbar;
}

}
function and I got through the implementation of the function(above). I got def->paddr = 0xfdf21000
    binfo->bi_immr_base = 0xfdf00000/*(ccsrbar)*/
above values.

Now my requirement is
1)what is this OCP table and why it is required

2)To access the DMA controller registers what base address should I use.is it combination  (def->paddr += ccsrbar) or simply def->paddress or ccsrbar(binfo->bi_immr_base ).

Thanks in advance,

Regards

Jhoney_joney