Dear Wolfgang Denk, Wolfgang Denk schrieb: > Dear Jens Gehrlein, > > In message <49d323e5.9080...@tqs.de> you wrote: >> AFAIK, while running from flash, u-boot uses (part of) d-cache on some >> platforms for the C stack. I think, it's on MPC83xx and MPC85xx? >> >> Does anybody know, if I can use the remaining part of the d-cache >> as normal d-cache, e.g. to generate bursts on the SDRAM interface >> while testing the RAM? > > On which platform? > > Note that implementing a memory test that actually triggers burst > mode accesses is really, really tricky. You probably do NOT want to > do this while running from flash (i. e. from a very restrictive > envrionment).
Why not? Of course, it's only possible if I can use a part of the D-Cache as C stack (or another internal RAM if available). This must be separately checked for each processor. > You might want to have a look at examples/test_burst* > but note that this code was written for a MPC8xx system, so changes > will be required for 83xx or 85xx. Thank you for the hint. I'll have a look. > Also note that a much more reliable test for burst mode errors is to > boot Linux with root file system over NFS and then compile the Linux > kernel on the target. I agree. Kind regards, Jens _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
