Blackfin arch: introducing bfin_addr_dcachable
This patch introduces bfin_addr_dcachable() predicate, that simply tests is
address in cachable region or not.
Signed-off-by: Bryan Wu <cooloney@kernel.org>
diff --git a/arch/blackfin/include/asm/cplbinit.h b/arch/blackfin/include/asm/cplbinit.h
index 9d23cd1..d179b74 100644
--- a/arch/blackfin/include/asm/cplbinit.h
+++ b/arch/blackfin/include/asm/cplbinit.h
@@ -92,4 +92,18 @@
extern void generate_cplb_tables(void);
+static inline int bfin_addr_dcachable(unsigned long addr)
+{
+#ifdef CONFIG_BFIN_DCACHE
+ if (addr < (_ramend - DMA_UNCACHED_REGION))
+ return 1;
+#endif
+
+ if (reserved_mem_dcache_on &&
+ addr >= _ramend && addr < physical_mem_end)
+ return 1;
+
+ return 0;
+}
+
#endif
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 7054594..7f35d10 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -42,6 +42,7 @@
EXPORT_SYMBOL(memory_end);
EXPORT_SYMBOL(physical_mem_end);
EXPORT_SYMBOL(_ramend);
+EXPORT_SYMBOL(reserved_mem_dcache_on);
#ifdef CONFIG_MTD_UCLINUX
unsigned long memory_mtd_end, memory_mtd_start, mtd_size;