1 files changed, 31 insertions, 0 deletions
diff --git a/kernel/io/include/io/usart.h b/kernel/io/include/io/usart.h
new file mode 100644
index 0000000..62e2768
--- /dev/null
+++ b/kernel/io/include/io/usart.h
@@ -0,0 +1,31 @@
+#ifndef SERIAL_H
+#define SERIAL_H
+
+#include "collection/rbuffer.h"
+#include "collection/list.h"
+
+#define USARTS 1
+#define USART_BUFFER_SIZE 64
+
+struct usart_device_t {
+  volatile char __rx_buffer[USART_BUFFER_SIZE];
+  volatile char __tx_buffer[USART_BUFFER_SIZE];
+
+  struct rbuffer_t rx_buffer;
+  struct rbuffer_t tx_buffer;
+
+  struct list_head rx_queue;
+  struct list_head tx_queue;
+};
+
+#define USART_DEVICE_INIT(name) \
+  { \
+    .rx_buffer = RBUFFER_ARRAY_INIT(name.__rx_buffer, USART_BUFFER_SIZE), \
+    .tx_buffer = RBUFFER_ARRAY_INIT(name.__tx_buffer, USART_BUFFER_SIZE), \
+    .rx_queue = LIST_HEAD_INIT(name.rx_queue), \
+    .tx_queue = LIST_HEAD_INIT(name.tx_queue) \
+  }
+
+void usart_init(unsigned long baud);
+
+#endif
+\ No newline at end of file