io.h from linux-0.01

https://github.com/zavg/linux-0.01/ I got the URL finally.

kernel/include/asm/io.h

@@ -0,0 +1,24 @@
+#define outb(value,port) \
+__asm__ ("outb %%al,%%dx"::"a" (value),"d" (port))
+
+
+#define inb(port) ({ \
+unsigned char _v; \
+__asm__ volatile ("inb %%dx,%%al":"=a" (_v):"d" (port)); \
+_v; \
+})
+
+#define outb_p(value,port) \
+__asm__ ("outb %%al,%%dx\n" \
+		"\tjmp 1f\n" \
+		"1:\tjmp 1f\n" \
+		"1:"::"a" (value),"d" (port))
+
+#define inb_p(port) ({ \
+unsigned char _v; \
+__asm__ volatile ("inb %%dx,%%al\n" \
+	"\tjmp 1f\n" \
+	"1:\tjmp 1f\n" \
+	"1:":"=a" (_v):"d" (port)); \
+_v; \
+})