x86_64: update serial driver to support kernel debugging

2026-06-06 17:51:01 +01:00
parent 249ac7a8cf
commit eb15d2ffa3
3 changed files with 170 additions and 48 deletions
@@ -1,14 +1,21 @@
 #ifndef ARCH_SERIAL_H_
 #define ARCH_SERIAL_H_

+#include <magenta/types.h>
+#include <stddef.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif

-#define SERIAL_PORT_A 0x3F8
-#define SERIAL_PORT_B 0x2F8
-#define SERIAL_PORT_C 0x3E8
-#define SERIAL_PORT_D 0x2E8
+#define COM(x) (x)
+
+#define COM1   COM(1)
+#define COM2   COM(2)
+#define COM3   COM(3)
+#define COM4   COM(4)
+
+extern void serial_init(int baud);

 extern void serial_putchar(int port, char ch);

@@ -18,7 +25,18 @@ extern char serial_recv_byte(int device);

 extern int serial_rcvd(int device);

-extern void early_serialcon_init(int baud);
+extern kern_status_t serial_read(
+	int device,
+	void *buf,
+	size_t max,
+	size_t *nr_read);
+extern kern_status_t serial_write(
+	int device,
+	const void *buf,
+	size_t count,
+	size_t *nr_written);
+
+extern void early_serialcon_init(void);

 #ifdef __cplusplus
 }