Hello, list!

I have a development board based on LPC3250 and Samsung K9F1G08U0C NAND flash. My CPU was worked at 208 MHz, so I calculate timings for LPC3250's on-chip SLC NAND-controller.

SLCNAND->slc_tac = (SLCTAC_WDR(3) | SLCTAC_WWIDTH(3) | SLCTAC_WHOLD(1) | SLCTAC_WSETUP(2) | SLCTAC_RDR(3) | SLCTAC_RWIDTH(3) | SLCTAC_RHOLD(1) | SLCTAC_RSETUP(4));

But u-boot speed is very slow.

How I can increase boot speed?