move the x86 port io code to a separate file

2 files changed, 13 insertions, 11 deletions

diff --git a/src/kernel/arch/i386/port_io.h b/src/kernel/arch/i386/port_io.h
new file mode 100644
index 0000000..db755b4
--- /dev/null
+++ b/src/kernel/arch/i386/port_io.h
@@ -0,0 +1,12 @@
+#include <stdint.h>
+
+inline void port_outb(uint16_t port, uint8_t val) {
+	asm volatile("outb %0, %1" : : "a" (val), "Nd" (port));
+}
+
+inline uint8_t port_inb(uint16_t port) {
+	uint8_t val;
+	asm volatile("inb %1, %0" : "=a" (val) : "Nd" (port));
+	return val;
+}
+
diff --git a/src/kernel/arch/i386/tty/serial.c b/src/kernel/arch/i386/tty/serial.c
index bf55c41..6bfe212 100644
--- a/src/kernel/arch/i386/tty/serial.c
+++ b/src/kernel/arch/i386/tty/serial.c
@@ -1,19 +1,9 @@
 #include <kernel/arch/i386/tty/serial.h>
+#include <kernel/arch/i386/port_io.h>
 #include <stdint.h>
 
 const int COM1 = 0x3f8;
 
-// TODO move to some header file
-inline void port_outb(uint16_t port, uint8_t val) {
-	asm volatile("outb %0, %1" : : "a" (val), "Nd" (port));
-}
-
-inline uint8_t port_inb(uint16_t port) {
-	uint8_t val;
-	asm volatile("inb %1, %0" : "=a" (val) : "Nd" (port));
-	return val;
-}
-
 void serial_init() {
 	// see https://www.sci.muni.cz/docs/pc/serport.txt