How can I allocate a variable to a specific section?

I want this variable to represent a raw frame which the algorithm will access frequently. So allocating this frame in the onchip RAM will increase the processing speed.

Here you the linker script:

--- Quote Start ---

MEMORY

{

reset : ORIGIN = 0x04120000, LENGTH = 32

epcs_controller : ORIGIN = 0x04141800, LENGTH = 2048

onchip_ram_100Kbytes : ORIGIN = 0x04120020, LENGTH = 99968

ssram : ORIGIN = 0x04000000, LENGTH = 1048576

ddr2_sdram : ORIGIN = 0x00000000, LENGTH = 67108864

}

/* Define symbols for each memory base-address */

__alt_mem_epcs_controller = 0x04141800 ;

__alt_mem_onchip_ram_100Kbytes = 0x04120000 ;

__alt_mem_ssram = 0x04000000 ;

__alt_mem_ddr2_sdram = 0x00000000 ;

--- Quote End ---

I displayed the the variable address and it is correct:

--- Quote Start ---

Address of rawVideo is 0x041201c8

--- Quote End ---

but the read operation cannot be done.

The question is must I define the corresponding section (i.e. .onchip_ram_100Kbytes.rwdata), and if so, how can that be done? It seems that I have to modify the linker memory regions using the BSP Build Tools?

If there is another way to do so, I will be appreciated if you mention it because I have a deadline to finish my work and I am afraid that the BSP Build Tools software will take much time.

Thanks a lot.http://www.qtl.co.il/img/copy.png http://www.qtl.co.il/img/copy.png