include/drivers/marvell/mochi: add detection of secure mode

Change-Id: I99afc312617df86ae68eb30302203a03877ca748
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Reviewed-on: https://sj1git1.cavium.com/22541
Reviewed-by: Stefan Chulski <stefanc@marvell.com>
Reviewed-by: Grzegorz Jaszczyk <jaszczyk@marvell.com>
Tested-by: sa_ip-sw-jenkins <sa_ip-sw-jenkins@marvell.com>

include/drivers/marvell/mochi/cp110_setup.h

@@ -31,6 +31,9 @@
 #define MAX_STREAM_ID_PER_CP		(0x10)
 #define STREAM_ID_BASE			(0x40)
 
+#define MVEBU_SECUREBOOT_CTRL_REG	(MVEBU_RFU_BASE + 0x4730)
+#define MVEBU_SECUREBOOT_EN_MASK	BIT(0)
+
 static inline uint32_t cp110_device_id_get(uintptr_t base)
 {
 	/* Returns:
@@ -50,6 +53,12 @@ static inline uint32_t cp110_rev_id_get(uintptr_t base)
 		MVEBU_DEVICE_REV_OFFSET;
 }
 
+static inline uint32_t is_secure(void)
+{
+	return !!(mmio_read_32(MVEBU_SECUREBOOT_CTRL_REG) &
+			       MVEBU_SECUREBOOT_EN_MASK);
+}
+
 void cp110_init(uintptr_t cp110_base, uint32_t stream_id);
 void cp110_ble_init(uintptr_t cp110_base);
 void cp110_amb_init(uintptr_t base);