On 03/24/2015 12:49 PM, Scott Wood wrote:
On Tue, 2015-03-24 at 12:47 -0700, York Sun wrote:
+Booting from NAND +------------------- +Booting from NAND requires two images, RCW and u-boot-with-spl.bin. +The difference between NAND boot RCW image and NOR boot image is the PBI +command sequence. Below is one example for PBI commands for QDS.
+1) CCSR 4-byte write to 0x00e00404, data=0x00000000 +2) CCSR 4-byte write to 0x00e00400, data=0x1800a000 +The above two commands set bootloc register to 0x00000000_1800a000 where +the u-boot code will be running in OCRAM.
+3) Block Copy: SRC=0x0107, SRC_ADDR=0x00100000, DEST_ADDR=0x1800a000, +BLOCK_SIZE=0x00014000 +This command copies u-boot image from NAND device into OCRAM. The values need +to adjust accordingly.
+SRC should match the cfg_rcw_src, the reset config pins. It depends
on the NAND device. See reference manual for cfg_rcw_src.+SRC_ADDR is the offset of u-boot image in NAND device. It should match
CONFIG_SYS_NAND_U_BOOT_OFFS. In the example above, it is 1MB.Why 1 MiB?
I got it wrong. I though the erase size is 1MB, but actually it is 128KB. I will fix it.
York