add outw function

2 files changed, 8 insertions, 0 deletions

diff --git a/kernel/include/io.h b/kernel/include/io.h
index c3c735b..d1177ac 100644
--- a/kernel/include/io.h
+++ b/kernel/include/io.h
@@ -1,4 +1,5 @@
 #include <stdint.h>
 void outb(uint16_t port, uint8_t val);
+void outw(uint16_t port, uint16_t val);
 uint8_t inb(uint16_t port);
 uint16_t inw(uint16_t port);
diff --git a/kernel/io.c b/kernel/io.c
index 9b56b5d..33b7f7c 100644
--- a/kernel/io.c
+++ b/kernel/io.c
@@ -5,12 +5,19 @@ void outb(uint16_t port, uint8_t val)
 {
     asm volatile ("outb %1, %0": :"dN" (port), "a" (val));
 }
+
+void outw(uint16_t port, uint16_t val)
+{
+    asm volatile ("outw %1, %0": :"dN" (port), "a"(val));
+}
+
 uint8_t inb(uint16_t port)
 {
     uint8_t ret;
     asm volatile ("inb %1, %0" : "=a" (ret) : "dN" (port));
     return ret;
 }
+
 uint16_t inw(uint16_t port)
 {
     uint16_t ret;