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| author | Graf Yang <graf.yang@analog.com> | 2009-05-07 04:09:15 (GMT) |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2009-06-12 10:11:41 (GMT) |
| commit | 5ba766752d14a741aa2d7a3c321917a310b34afb (patch) | |
| tree | a97d8174cded42843de44b08d613c350b28a2729 /arch/blackfin/mach-common | |
| parent | a261eec0009b6093727fb7a59b12a10c6c981714 (diff) | |
| download | linux-5ba766752d14a741aa2d7a3c321917a310b34afb.tar.xz | |
Blackfin: work around anomaly 05000220
When possible, work around anomaly 05000220 (external memory is write
back cached, but L2 is not cached). If not possible, detect the
conditions at build time and reject any qualifying configurations.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/mach-common')
| -rw-r--r-- | arch/blackfin/mach-common/arch_checks.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/blackfin/mach-common/arch_checks.c b/arch/blackfin/mach-common/arch_checks.c index 80d39b2..da93d92 100644 --- a/arch/blackfin/mach-common/arch_checks.c +++ b/arch/blackfin/mach-common/arch_checks.c @@ -71,3 +71,10 @@ #if ANOMALY_05000448 # error You are using a part with anomaly 05000448, this issue causes random memory read/write failures - that means random crashes. #endif + +/* if 220 exists, can not set External Memory WB and L2 not_cached, either External Memory not_cached and L2 WB */ +#if ANOMALY_05000220 && \ + ((defined(CONFIG_BFIN_WB) && defined(CONFIG_BFIN_L2_NOT_CACHED)) || \ + (!defined(CONFIG_BFIN_DCACHE) && defined(CONFIG_BFIN_L2_WB))) +# error You are exposing Anomaly 220 in this config, either config L2 as Write Through, or make External Memory WB. +#endif |