+/* MEMCTRL register bits */
+#define MEMCTRL_SDRS_MASK BITMASK(3) /* SDRAM bank size */
+#define MEMCTRL_SDRS_4M 0x01
+#define MEMCTRL_SDRS_8M 0x02
+#define MEMCTRL_SDRS_16M 0x03
+#define MEMCTRL_SDRS_64M 0x04
+#define MEMCTRL_SDRS_128M 0x05
+#define MEMCTRL_SDR1_ENABLE ONEBIT(5) /* enable SDRAM bank 1 */
+
+#define MEMCTRL_SRS0_SHIFT 8 /* shift for SRAM0 size */
+#define MEMCTRL_SRS1_SHIFT 16 /* shift for SRAM1 size */
+#define MEMCTRL_SRS_MASK BITMASK(3) /* SRAM size mask */
+#define MEMCTRL_SRS_DISABLED 0x00 /* Disabled */
+#define MEMCTRL_SRS_512K 0x01 /* 512KB*/
+#define MEMCTRL_SRS_1M 0x02 /* 1MB */
+#define MEMCTRL_SRS_2M 0x03 /* 2MB */
+#define MEMCTRL_SRS_4M 0x04 /* 4MB */
+
+/* GPIO_CONF0 register bits */
+#define GPIO_CONF0_MASK BITMASK(8)
+#define GPIO_CONF0_IM_SHIFT 0
+#define GPIO_CONF0_IV_SHIFT 8
+#define GPIO_CONF0_OE_SHIFT 16
+#define GPIO_CONF0_OV_SHIFT 24
+#define GPIO_CONF0_IM_MASK (0xFF << GPIO_CONF0_IM_SHIFT)
+#define GPIO_CONF0_IV_MASK (0xFF << GPIO_CONF0_IV_SHIFT)
+#define GPIO_CONF0_OE_MASK (0xFF << GPIO_CONF0_OE_SHIFT)
+#define GPIO_CONF0_OV_MASK (0xFF << GPIO_CONF0_OV_SHIFT)
+
+/* TIMER_INT register bits */
+#define TIMER_INT_TOS ONEBIT(1) /* time-out status */
+#define TIMER_INT_TOM ONEBIT(16) /* mask time-out interrupt */
+
+/* TIMER register bits */
+#define TIMER_PERIOD_MASK BITMASK(16) /* mask for timer period */
+#define TIMER_PERIOD_DEFAULT 0xFFFF /* default timer period */
+#define TIMER_TE ONEBIT(16) /* timer enable bit */
+
+/* PORTx_LED register bits */
+#define LED_MODE_MASK BITMASK(4)
+#define LED_MODE_INPUT 0
+#define LED_MODE_FLASH 1
+#define LED_MODE_OUT_HIGH 2
+#define LED_MODE_OUT_LOW 3
+#define LED_MODE_LINK 4
+#define LED_MODE_SPEED 5
+#define LED_MODE_DUPLEX 6
+#define LED_MODE_ACT 7
+#define LED_MODE_COLL 8
+#define LED_MODE_LINK_ACT 9
+#define LED_MODE_DUPLEX_COLL 10
+#define LED_MODE_10M_ACT 11
+#define LED_MODE_100M_ACT 12
+#define LED0_MODE_SHIFT 0 /* LED0 mode shift */
+#define LED1_MODE_SHIFT 4 /* LED1 mode shift */
+#define LED2_MODE_SHIFT 8 /* LED2 mode shift */
+#define LED0_IV_SHIFT 12 /* LED0 input value shift */
+#define LED1_IV_SHIFT 13 /* LED1 input value shift */
+#define LED2_IV_SHIFT 14 /* LED2 input value shift */