diff --git a/include/libopencm3/cm3/common.h b/include/libopencm3/cm3/common.h
index 4aa879ce..7e758822 100644
--- a/include/libopencm3/cm3/common.h
+++ b/include/libopencm3/cm3/common.h
@@ -52,6 +52,13 @@
 #define MMIO32(addr)		(*(volatile uint32_t *)(addr))
 #define MMIO64(addr)		(*(volatile uint64_t *)(addr))
 
+/* Generic bit-band I/O accessor functions */
+#define BBIO_SRAM(addr,bit) \
+	MMIO8(((addr) & 0x0FFFFF) * 32 | 0x22000000 + (bit) * 4 )
+
+#define BBIO_PERIPH(addr,bit) \
+	MMIO8(((addr) & 0x0FFFFF) * 32 | 0x42000000 + (bit) * 4 )
+
 /* Generic bit definition */
 #define BIT0  (1<<0)
 #define BIT1  (1<<1)