JZ2440 SDRAM

void sdram_init()

{

         BWSCON   = 0x22000000;

         BANKCON6 =0x18001;

         BANKCON7 =0x18001;

         REFRESH  = 0x8404F5;

         BANKSIZE =0xB1;

         MRSRB6   = 0x20;

         MRSRB7   = 0x20;

}