Liu Dave-R63238 wrote:
with this patch, this mpc8313 board does this:
U-Boot 2009.06-00524-g28958b8 (Jul 23 2009 - 18:33:11) MPC83XX
Reset Status:
CPU: e300c3, MPC8313E, Rev: 1.0 at 333.333 MHz, CSB: 166.667 MHz Board: Freescale MPC8313ERDB I2C: ready DRAM: 128 MB FLASH: ## Unknown FLASH on Bank 1 - Size = 0x00000000 = 0 MB *** failed *** ### ERROR ### Please RESET the board ###
and when reverted, it boots normally, so the board wants to
agree that
this patch is reverted.
Flash is mapped cacheable on 8313erdb (and some other 83xx boards) -- it shares a BAT with the locked cache area.
Yes. Scott is right. The rootcause is the classic PPC has not enough BAT.
8313erdb has an unused BAT7 (not counting the ones that would normally be used for PCI2), and there are other 83xx boards that look like they get it right.
-Scott