diff --git a/platform/fpga/openpiton/platform.c b/platform/fpga/openpiton/platform.c
index 2317a89..4a83ca9 100644
--- a/platform/fpga/openpiton/platform.c
+++ b/platform/fpga/openpiton/platform.c
@@ -17,17 +17,17 @@
 #include <sbi_utils/serial/uart8250.h>
 #include <sbi_utils/timer/aclint_mtimer.h>
 
-#define OPENPITON_DEFAULT_UART_ADDR		0xfff0c2c000
-#define OPENPITON_DEFAULT_UART_FREQ		60000000
+#define OPENPITON_DEFAULT_UART_ADDR		0x40001000
+#define OPENPITON_DEFAULT_UART_FREQ		50000000
 #define OPENPITON_DEFAULT_UART_BAUDRATE		115200
 #define OPENPITON_DEFAULT_UART_REG_SHIFT	0
 #define OPENPITON_DEFAULT_UART_REG_WIDTH	1
-#define OPENPITON_DEFAULT_UART_REG_OFFSET	0
+#define OPENPITON_DEFAULT_UART_REG_OFFSET	0x1000
 #define OPENPITON_DEFAULT_PLIC_ADDR		0xfff1100000
 #define OPENPITON_DEFAULT_PLIC_SIZE		(0x200000 + \
 				(OPENPITON_DEFAULT_HART_COUNT * 0x1000))
 #define OPENPITON_DEFAULT_PLIC_NUM_SOURCES	2
-#define OPENPITON_DEFAULT_HART_COUNT		3
+#define OPENPITON_DEFAULT_HART_COUNT		1
 #define OPENPITON_DEFAULT_CLINT_ADDR		0xfff1020000
 #define OPENPITON_DEFAULT_ACLINT_MTIMER_FREQ	1000000
 #define OPENPITON_DEFAULT_ACLINT_MSWI_ADDR	\