2016-01-27 3:13 GMT+01:00 Marek Vasut <ma...@denx.de>: > This patch makes sure that the flush/invalidate_dcache_range() functions > can handle corner-case calls like this -- invalidate_dcache_range(0, 0, 0); > This call is valid and is happily produced by USB EHCI code for example. > The expected behavior of the cache function(s) in this case is that they > will do no operation, since the size is zero. > > The current implementation though has a problem where such invocation will > result in a hard CPU hang. This is because under such conditions, where the > start_addr = 0 and stop = 0, the addr = 0 and aend = 0xffffffe0 . The loop > will then try to iterate over the entire address space, which in itself is > wrong. But iterating over the entire address space might also hit some odd > address which will cause bus hang. The later happens on the Atheros MIPS. > > Signed-off-by: Marek Vasut <ma...@denx.de> > Cc: Daniel Schwierzeck <daniel.schwierz...@gmail.com> > Cc: Hans de Goede <hdego...@redhat.com> > --- > arch/mips/lib/cache.c | 8 ++++++++ > 1 file changed, 8 insertions(+) >
applied to u-boot-mips, thanks -- - Daniel _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot