On Tue, Mar 17, 2009 at 01:44:43PM -0700, SortaSBS Guy wrote: > 1. Does u-boot/linux make any assumptions about how particular BAT > registers are used? For example, we're not using PCI, and I was going > to use those BAT registers to cover some memory-mapped peripheral I/O > space (ex: icecube.c, DBAT3 and 4 are used for PCI, so I would use them > instead for our I/O ranges.)
No, it's up to the individual board config. > 2. Do you need a separate BAT register for each memory mapped I/O > space? We have 4 chip selects, but could I arrange the chip selects to > use a contiguous range and presumably cover that with a single BAT > register? Yes, if they all have the same mapping attributes. Make sure you set the guarded bit if there are any holes. > 3. Would I need separate BAT registers for 8-bit vs. 16-bit devices? No. -Scott _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
