nios2: fix map_physmem to do real cache mapping
Fix the map_physmem() to do real cache mapping.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Acked-by: Marek Vasut <marex@denx.de>
diff --git a/arch/nios2/cpu/cpu.c b/arch/nios2/cpu/cpu.c
index ff0fa20..88c4e18 100644
--- a/arch/nios2/cpu/cpu.c
+++ b/arch/nios2/cpu/cpu.c
@@ -117,7 +117,8 @@
"altr,has-initda", 0);
gd->arch.has_mmu = fdtdec_get_int(blob, node,
"altr,has-mmu", 0);
- gd->arch.io_region_base = gd->arch.has_mmu ? 0xe0000000 : 0x8000000;
+ gd->arch.io_region_base = gd->arch.has_mmu ? 0xe0000000 : 0x80000000;
+ gd->arch.mem_region_base = gd->arch.has_mmu ? 0xc0000000 : 0x00000000;
return 0;
}
diff --git a/arch/nios2/include/asm/global_data.h b/arch/nios2/include/asm/global_data.h
index d6a2cfa..9f3bd00 100644
--- a/arch/nios2/include/asm/global_data.h
+++ b/arch/nios2/include/asm/global_data.h
@@ -18,6 +18,7 @@
int has_initda;
int has_mmu;
u32 io_region_base;
+ u32 mem_region_base;
};
#include <asm-generic/global_data.h>
diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h
index e7da35b..007df8d 100644
--- a/arch/nios2/include/asm/io.h
+++ b/arch/nios2/include/asm/io.h
@@ -18,7 +18,7 @@
* that can be used to access the memory range with the caching
* properties specified by "flags".
*/
-#define MAP_NOCACHE (0)
+#define MAP_NOCACHE (1)
#define MAP_WRCOMBINE (0)
#define MAP_WRBACK (0)
#define MAP_WRTHROUGH (0)
@@ -26,7 +26,11 @@
static inline void *
map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
{
- return (void *)paddr;
+ DECLARE_GLOBAL_DATA_PTR;
+ if (flags)
+ return (void *)(paddr | gd->arch.io_region_base);
+ else
+ return (void *)(paddr | gd->arch.mem_region_base);
}
/*