Blackfin: decouple unrelated cache settings to get exact behavior

[safe/jmp/linux-2.6] / arch / blackfin / mach-common / arch_checks.c

diff --git a/arch/blackfin/mach-common/arch_checks.c b/arch/blackfin/mach-common/arch_checks.c
index 80d39b2..5998d86 100644 (file)
--- 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_EXTMEM_WRITEBACK) && !defined(CONFIG_BFIN_L2_DCACHEABLE)) || \
+        (!defined(CONFIG_BFIN_EXTMEM_DCACHEABLE) && defined(CONFIG_BFIN_L2_WRITEBACK)))
+# error You are exposing Anomaly 220 in this config, either config L2 as Write Through, or make External Memory WB.
+#endif