2008-11-26 (수), 16:10 +0100, Michael Lawnick 쓰시길: > Choe, Hyun-ho said the following: > > My second workaround is strange, too. > > In ARM code, mapping physical address to logical is actually does > > nothing, except re-calculating pointer with sector no. and offset. > > It just eating several processor cycles. > > I actually have no ARM experience, but when you talk about 'mapping' the > word 'cache' is coming to my mind. Any chance that you have not disabled > caching for flash access address space?
If you mean Instruction Cache/Data Cache, yes, ARM have them. In CPU start-up code, DCache is disabled & ICache is enabled by default. And always be in the same status all the time. Turning off ICache has no effect. (If you are interested, see cpu/arm*/start.S & cpu.c, you may already know.) Regards, Choe, Hyun-ho _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
