1 files changed, 26 insertions, 0 deletions
diff --git a/include/device/portio.h b/include/device/portio.h
new file mode 100644
index 0000000..76b28c4
--- /dev/null
+++ b/include/device/portio.h
@@ -0,0 +1,26 @@
+#ifndef _JOVE_PORTIO_H
+#define _JOVE_PORTIO_H 1
+
+#include <stdint.h>
+
+typedef uint16_t ioport_t;
+
+static inline uint8_t port_inb(ioport_t port)
+{ uint8_t r; __asm__ volatile("inb %w1, %b0": "=a"(r): "Nd"(port): "memory"); return r; }
+
+static inline uint16_t port_inw(ioport_t port)
+{ uint16_t r; __asm__ volatile("inw %w1, %w0": "=a"(r): "Nd"(port): "memory"); return r; }
+
+static inline uint32_t port_inl(ioport_t port)
+{ uint32_t r; __asm__ volatile("inl %d1, %l0": "=a"(r): "Nd"(port): "memory"); return r; }
+
+static inline void port_outb(ioport_t port, uint8_t v)
+{ __asm__ volatile("outb %b0, %w1":: "a"(v), "Nd"(port): "memory"); }
+
+static inline void port_outw(ioport_t port, uint16_t v)
+{ __asm__ volatile("outb %w0, %w1":: "a"(v), "Nd"(port): "memory"); }
+
+static inline void port_outl(ioport_t port, uint32_t v)
+{ __asm__ volatile("outb %d0, %w1":: "a"(v), "Nd"(port): "memory"); }
+
+#endif