diff --git a/arch/arm/boot/dts/amlogic/g12a_s905d2_u200.dts b/arch/arm/boot/dts/amlogic/g12a_s905d2_u200.dts
index c5e894a25c65..3b95f4c8c5d8 100644
--- a/arch/arm/boot/dts/amlogic/g12a_s905d2_u200.dts
+++ b/arch/arm/boot/dts/amlogic/g12a_s905d2_u200.dts
@@ -45,7 +45,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x000000 0x80000000>;
+		linux,usable-memory = <0x100000 0x7ff00000>;
 	};
 
 	reserved-memory {
diff --git a/arch/arm/boot/dts/amlogic/g12a_s905d2_u200_1g.dts b/arch/arm/boot/dts/amlogic/g12a_s905d2_u200_1g.dts
index 25a38773ac6e..39f49da3102a 100644
--- a/arch/arm/boot/dts/amlogic/g12a_s905d2_u200_1g.dts
+++ b/arch/arm/boot/dts/amlogic/g12a_s905d2_u200_1g.dts
@@ -45,7 +45,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x000000 0x40000000>;
+		linux,usable-memory = <0x100000 0x3ff00000>;
 	};
 
 	reserved-memory {
diff --git a/arch/arm/boot/dts/amlogic/g12a_s905x2_u212.dts b/arch/arm/boot/dts/amlogic/g12a_s905x2_u212.dts
index 501a60803fa7..dee8afaf6c9d 100644
--- a/arch/arm/boot/dts/amlogic/g12a_s905x2_u212.dts
+++ b/arch/arm/boot/dts/amlogic/g12a_s905x2_u212.dts
@@ -45,7 +45,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x000000 0x80000000>;
+		linux,usable-memory = <0x100000 0x7ff00000>;
 	};
 
 	reserved-memory {
diff --git a/arch/arm/boot/dts/amlogic/g12a_s905x2_u212_1g.dts b/arch/arm/boot/dts/amlogic/g12a_s905x2_u212_1g.dts
index 3a2feedadf1c..dae759d71634 100644
--- a/arch/arm/boot/dts/amlogic/g12a_s905x2_u212_1g.dts
+++ b/arch/arm/boot/dts/amlogic/g12a_s905x2_u212_1g.dts
@@ -45,7 +45,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x000000 0x40000000>;
+		linux,usable-memory = <0x100000 0x3ff00000>;
 
 	};
 
diff --git a/arch/arm/boot/dts/amlogic/g12a_s905y2_u221.dts b/arch/arm/boot/dts/amlogic/g12a_s905y2_u221.dts
index dffeca8af531..66b64d6012c5 100644
--- a/arch/arm/boot/dts/amlogic/g12a_s905y2_u221.dts
+++ b/arch/arm/boot/dts/amlogic/g12a_s905y2_u221.dts
@@ -44,7 +44,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x000000 0x80000000>;
+		linux,usable-memory = <0x100000 0x7ff00000>;
 	};
 
 	reserved-memory {
diff --git a/arch/arm/boot/dts/amlogic/g12b_a311d_w400.dts b/arch/arm/boot/dts/amlogic/g12b_a311d_w400.dts
index 39f0d5498d98..b858e07da5dd 100644
--- a/arch/arm/boot/dts/amlogic/g12b_a311d_w400.dts
+++ b/arch/arm/boot/dts/amlogic/g12b_a311d_w400.dts
@@ -45,7 +45,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x000000 0x80000000>;
+		linux,usable-memory = <0x100000 0x7ff00000>;
 	};
 
 	reserved-memory {