nds32: ftmac100 support cache enable.
Enable cache and ftmac100 performance can be improved.
Signed-off-by: rick <rick@andestech.com>
diff --git a/arch/nds32/include/asm/io.h b/arch/nds32/include/asm/io.h
index b2c4d0e..e8ee961 100644
--- a/arch/nds32/include/asm/io.h
+++ b/arch/nds32/include/asm/io.h
@@ -48,6 +48,27 @@
#define MAP_WRBACK (0)
#define MAP_WRTHROUGH (0)
+#ifdef CONFIG_ARCH_MAP_SYSMEM
+static inline void *map_sysmem(phys_addr_t paddr, unsigned long len)
+{
+ if(paddr <PHYS_SDRAM_0_SIZE + PHYS_SDRAM_1_SIZE)
+ paddr = paddr | 0x40000000;
+ return (void *)(uintptr_t)paddr;
+}
+
+static inline void *unmap_sysmem(const void *vaddr)
+{
+ phys_addr_t paddr = (phys_addr_t)vaddr;
+ paddr = paddr & ~0x40000000;
+ return (void *)(uintptr_t)paddr;
+}
+
+static inline phys_addr_t map_to_sysmem(const void *ptr)
+{
+ return (phys_addr_t)(uintptr_t)ptr;
+}
+#endif
+
static inline void *
map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
{