rpi3: Introduce hardware RNG driver
Note that this is a non-secure RNG. This is only useful for educational
purposes.
Change-Id: If359c8d0f755ef8e416986de7fbca34679a523e1
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/rpi3/rpi3_hw.h b/plat/rpi3/rpi3_hw.h
index a83a0ad..1a26053 100644
--- a/plat/rpi3/rpi3_hw.h
+++ b/plat/rpi3/rpi3_hw.h
@@ -59,6 +59,24 @@
#define RPI3_PM_RSTS_WRCFG_HALT U(0x00000555)
/*
+ * Hardware random number generator.
+ */
+#define RPI3_IO_RNG_OFFSET ULL(0x00104000)
+#define RPI3_RNG_BASE (RPI3_IO_BASE + RPI3_IO_RNG_OFFSET)
+#define RPI3_RNG_CTRL_OFFSET ULL(0x00000000)
+#define RPI3_RNG_STATUS_OFFSET ULL(0x00000004)
+#define RPI3_RNG_DATA_OFFSET ULL(0x00000008)
+#define RPI3_RNG_INT_MASK_OFFSET ULL(0x00000010)
+/* Enable/disable RNG */
+#define RPI3_RNG_CTRL_ENABLE U(0x1)
+#define RPI3_RNG_CTRL_DISABLE U(0x0)
+/* Number of currently available words */
+#define RPI3_RNG_STATUS_NUM_WORDS_SHIFT U(24)
+#define RPI3_RNG_STATUS_NUM_WORDS_MASK U(0xFF)
+/* Value to mask interrupts caused by the RNG */
+#define RPI3_RNG_INT_MASK_DISABLE U(0x1)
+
+/*
* Serial port (called 'Mini UART' in the BCM docucmentation).
*/
#define RPI3_IO_MINI_UART_OFFSET ULL(0x00215040)