1 files changed, 73 insertions, 0 deletions
diff --git a/software/shared/shared.h b/software/shared/shared.h
new file mode 100644
index 0000000..e8f3bf4
--- /dev/null
+++ b/software/shared/shared.h
@@ -0,0 +1,73 @@
+// See LICENSE for license details.
+
+#ifndef SIFIVE_SHARED_H
+#define SIFIVE_SHARED_H
+
+#include "uart.h"
+#include "gpio.h"
+#include "plic.h"
+
+// Some things missing from the official encoding.h
+#define MCAUSE_INT         0x80000000
+#define MCAUSE_CAUSE       0x7FFFFFFF
+
+/****************************************************************************
+ * Platform definitions
+ *****************************************************************************/
+
+#define MTIMECMP_BASE_ADDR     0x44004000UL
+#define MTIME_ADDR             0x4400BFF8UL
+#define PLIC_BASE_ADDR         0x40000000UL
+#define UART_BASE_ADDR         0x48000000UL
+#define GPIO_BASE_ADDR         0x48002000UL
+#define SPI_BASE_ADDR          0x48001000UL
+
+
+/****************************************************************************
+ * Clock Parameters
+ *****************************************************************************/
+
+#define RTC_PRESCALER 100
+#define CLOCK_FREQUENCY 62500000
+
+/****************************************************************************
+ * GPIO Connections
+ *****************************************************************************/
+
+
+// Each of these OFFSETS holds 4 bits.
+
+#define RED_LEDS_OFFSET   0
+#define GREEN_LEDS_OFFSET 4
+#define BLUE_LEDS_OFFSET  8
+#define JA_OUT_OFFSET     12 // JA Pins 1-4 are outputs.
+
+#define BUTTONS_OFFSET    16
+#define SWITCHES_OFFSET   20
+#define JA_IN_OFFSET      24 // JA Pins 7-10 are inputs.
+// reserved input offset   38 // Tied to zero.
+
+/****************************************************************************
+ * External Interrupts handled by PLIC.
+ *****************************************************************************/
+
+// Interrupt devices
+#define INT_DEVICE_BUTTON_0 1
+#define INT_DEVICE_BUTTON_1 2
+#define INT_DEVICE_BUTTON_2 3
+#define INT_DEVICE_BUTTON_3 4
+
+#define INT_DEVICE_JA_7 5
+#define INT_DEVICE_JA_8 6
+#define INT_DEVICE_JA_9 7
+#define INT_DEVICE_JA_10 8
+
+
+// Setting these correctly makes the initialization scripts
+// run faster.
+#define PLIC_NUM_SOURCES 31
+#define PLIC_NUM_PRIORITIES 0
+
+void write_hex(int fd, uint32_t hex);
+
+#endif