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PUZZLED ...DM6467 How to configure the memory table....I want to place some data in L1 or L2

I am a new hand at DAVINCI

moving an algorithm to be a CODEC_ENGINE。After months of working , it could run correctly now, but need to be optimizing. 

I  want to place some data in L1 OR L2 ,

in  server.tcf:

DSKT2.DARAM0     = "IRAM";
DSKT2.DARAM1     = "IRAM";
DSKT2.DARAM2     = "IRAM";
DSKT2.SARAM0     = "IRAM";
DSKT2.SARAM1     = "IRAM";
DSKT2.SARAM2     = "IRAM";
DSKT2.ESDATA     = "DDRALGHEAP";

but where is IRAM,  and the size allowed?  how to  configure it ?  in which file??....

I saw somebody do in this way::

DSKT2.DARAM0     = "L1DHEAP";
DSKT2.DARAM1     = "L1DHEAP";
DSKT2.DARAM2     = "L1DHEAP";
DSKT2.SARAM0     = "L1DHEAP";
DSKT2.SARAM1     = "L1DHEAP";
DSKT2.SARAM2     = "L1DHEAP";

but when I changed IRAM to L1DHEAP,   and make , it said that L1DHEAP did not exist, why???!!!

and   where is SARAM   DARAM of DSKT?  Is the length restricted ?

DSKT2.ALLOW_EXTERNAL_SCRATCH = false;
DSKT2.SARAM_SCRATCH_SIZES[GROUP_0] = 65536;
DSKT2.SARAM_SCRATCH_SIZES[GROUP_1] = 0;
DSKT2.DARAM_SCRATCH_SIZES[GROUP_0] = 65536;
DSKT2.DARAM_SCRATCH_SIZES[GROUP_1] = 0;

so many problem     ..... I WANT TO CYR......

I need help ....