> >>> 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.
I believe the 8313erdb is ported from 8349emds. The 8349emds, itx has same problem as 8313erdb. We disable the MMU when we use the PCI express in current code. I remember we had to diable the MMU due to no enough BAT to cover PCI and PCI express and so on. Thanks, Dave _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
