diff --git a/board/atmel/atstk1000/atstk1000.c b/board/atmel/atstk1000/atstk1000.c
index c36cb57..d91d594 100644
--- a/board/atmel/atstk1000/atstk1000.c
+++ b/board/atmel/atstk1000/atstk1000.c
@@ -97,13 +97,11 @@
 	unsigned long actual_size;
 	void *sdram_base;
 
-	sdram_base = map_physmem(EBI_SDRAM_BASE, EBI_SDRAM_SIZE, MAP_NOCACHE);
+	sdram_base = uncached(EBI_SDRAM_BASE);
 
 	expected_size = sdram_init(sdram_base, &sdram_config);
 	actual_size = get_ram_size(sdram_base, expected_size);
 
-	unmap_physmem(sdram_base, EBI_SDRAM_SIZE);
-
 	if (expected_size != actual_size)
 		printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
 				actual_size >> 20, expected_size >> 20);