diff --git a/include/drivers/defs/zynq_parallella.h b/include/drivers/defs/zynq_parallella.h
index 4425b86..4050c08 100644
--- a/include/drivers/defs/zynq_parallella.h
+++ b/include/drivers/defs/zynq_parallella.h
@@ -30,6 +30,8 @@ namespace Zynq_parallella {
 		CPU_3X2X_CLOCK = 3*CPU_1X_CLOCK,
 		CPU_6X4X_CLOCK = 6*CPU_1X_CLOCK,
 
+		RAM_0_SIZE = 0x40000000, /* 1GiB */
+
 		CORTEX_A9_CLOCK             = 2*CPU_6X4X_CLOCK,
 		CORTEX_A9_PRIVATE_TIMER_CLK = CPU_3X2X_CLOCK,
 		CORTEX_A9_PRIVATE_TIMER_DIV = 100,
diff --git a/include/drivers/defs/zynq_zc702.h b/include/drivers/defs/zynq_zc702.h
index 3b9503a..e56ce37 100644
--- a/include/drivers/defs/zynq_zc702.h
+++ b/include/drivers/defs/zynq_zc702.h
@@ -30,6 +30,8 @@ namespace Zynq_zc702 {
 		CPU_3X2X_CLOCK = 3*CPU_1X_CLOCK,
 		CPU_6X4X_CLOCK = 6*CPU_1X_CLOCK,
 
+		RAM_0_SIZE = 0x40000000, /* 1GiB */
+
 		CORTEX_A9_CLOCK             = 2*CPU_6X4X_CLOCK,
 		CORTEX_A9_PRIVATE_TIMER_CLK = CPU_3X2X_CLOCK,
 		CORTEX_A9_PRIVATE_TIMER_DIV = 100,
diff --git a/include/drivers/defs/zynq_zc706.h b/include/drivers/defs/zynq_zc706.h
index 5ee4bfe..6191e20 100644
--- a/include/drivers/defs/zynq_zc706.h
+++ b/include/drivers/defs/zynq_zc706.h
@@ -30,6 +30,8 @@ namespace Zynq_zc706 {
 		CPU_3X2X_CLOCK = 3*CPU_1X_CLOCK,
 		CPU_6X4X_CLOCK = 6*CPU_1X_CLOCK,
 
+		RAM_0_SIZE = 0x40000000, /* 1GiB */
+
 		CORTEX_A9_CLOCK             = 2*CPU_6X4X_CLOCK,
 		CORTEX_A9_PRIVATE_TIMER_CLK = CPU_3X2X_CLOCK,
 		CORTEX_A9_PRIVATE_TIMER_DIV = 100,