1 files changed, 28 insertions, 0 deletions
diff --git a/openpcd/firmware/src/os/fifo.h b/openpcd/firmware/src/os/fifo.h
new file mode 100644
index 0000000..d91c6c2
--- /dev/null
+++ b/openpcd/firmware/src/os/fifo.h
@@ -0,0 +1,28 @@
+#ifndef _FIFO_H
+#define _FIFO_H
+
+#include <sys/types.h>
+
+#define FIFO_SIZE	1024
+
+struct fifo {
+	u_int16_t size;		/* actual FIFO size, can be smaller than 'data' */
+	u_int16_t producer;	/* index of producer */
+	u_int16_t consumer;	/* index of consumer */
+	u_int16_t watermark;
+	u_int8_t irq;
+	u_int8_t irq_en;
+	u_int8_t status;
+	void (*callback)(struct fifo *fifo, u_int8_t event, void *data);
+	void *cb_data;
+	u_int8_t data[FIFO_SIZE];
+};
+
+
+extern int fifo_init(struct fifo *fifo, u_int16_t size, 
+		     void (*callback)(struct fifo *fifo, u_int8_t event, void *data), void *cb_data);
+extern u_int16_t fifo_data_get(struct fifo *fifo, u_int16_t len, u_int8_t *data);
+extern u_int16_t fifo_data_put(struct fifo *fifo, u_int16_t len, u_int8_t *data);
+extern int fifo_available(struct fifo *fifo);
+
+#endif