diff --git a/src/avr/serial.c b/src/avr/serial.c
index fc71cf0e..33b42fc6 100644
--- a/src/avr/serial.c
+++ b/src/avr/serial.c
@@ -7,6 +7,7 @@
 #include <avr/interrupt.h> // USART0_RX_vect
 #include <string.h> // memmove
 #include "autoconf.h" // CONFIG_SERIAL_BAUD
+#include "board/io.h" // readb
 #include "board/misc.h" // console_get_input
 #include "sched.h" // DECL_INIT
 #include "irq.h" // irq_save
diff --git a/src/compiler.h b/src/compiler.h
index 7085f864..e414d093 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -39,23 +39,4 @@
             (((x) + ((__divisor) / 2)) / (__divisor));  \
         })
 
-static inline void writel(void *addr, uint32_t val) {
-    *(volatile uint32_t *)addr = val;
-}
-static inline void writew(void *addr, uint16_t val) {
-    *(volatile uint16_t *)addr = val;
-}
-static inline void writeb(void *addr, uint8_t val) {
-    *(volatile uint8_t *)addr = val;
-}
-static inline uint32_t readl(const void *addr) {
-    return *(volatile const uint32_t *)addr;
-}
-static inline uint16_t readw(const void *addr) {
-    return *(volatile const uint16_t *)addr;
-}
-static inline uint8_t readb(const void *addr) {
-    return *(volatile const uint8_t *)addr;
-}
-
 #endif // compiler.h
diff --git a/src/generic/io.h b/src/generic/io.h
new file mode 100644
index 00000000..2a16cf20
--- /dev/null
+++ b/src/generic/io.h
@@ -0,0 +1,25 @@
+#ifndef __GENERIC_IO_H
+#define __GENERIC_IO_H
+
+#include <stdint.h> // uint32_t
+
+static inline void writel(void *addr, uint32_t val) {
+    *(volatile uint32_t *)addr = val;
+}
+static inline void writew(void *addr, uint16_t val) {
+    *(volatile uint16_t *)addr = val;
+}
+static inline void writeb(void *addr, uint8_t val) {
+    *(volatile uint8_t *)addr = val;
+}
+static inline uint32_t readl(const void *addr) {
+    return *(volatile const uint32_t *)addr;
+}
+static inline uint16_t readw(const void *addr) {
+    return *(volatile const uint16_t *)addr;
+}
+static inline uint8_t readb(const void *addr) {
+    return *(volatile const uint8_t *)addr;
+}
+
+#endif // io.h