Dear Håvard Skinnemoen, I have tested the simple TLB implementation on our own hardware and it does work with CFI driver. Thanks a lot for introducing this, we had to wait so long ...
Am 02.08.2010 14:06, schrieb Haavard Skinnemoen: > Use the MMU hardware to set up 1:1 mappings between physical and virtual > addresses. This allows us to bypass the cache when accessing the flash > without having to do any physical-to-virtual address mapping in the CFI > driver. > > The virtual memory mappings are defined at compile time through a sorted > array of virtual memory range objects. When a TLB miss exception > happens, the exception handler does a binary search through the array > until it finds a matching entry and loads it into the TLB. The u-boot > image itself is covered by a fixed TLB entry which is never replaced. > > This makes the 'saveenv' command work again on ATNGW100 and other boards > using the CFI driver, hopefully without breaking any rules. > > Signed-off-by: Haavard Skinnemoen <haavard.skinnem...@atmel.com> Tested-by: Andreas Bießmann <biessm...@corscience.de> _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
