diff --git a/arch/arm/boot/dts/amlogic/g12a_s905d2_u200.dts b/arch/arm/boot/dts/amlogic/g12a_s905d2_u200.dts
index 14efeb2cebee..9842cd3b44db 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 = <0x100000 0x7ff00000>;
+		linux,usable-memory = <0x000000 0x80000000>;
 	};
 
 	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 e83075a04a4d..7666ac4ddff3 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 = <0x100000 0x3ff00000>;
+		linux,usable-memory = <0x000000 0x40000000>;
 	};
 
 	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 e55a93b31e4e..58fcf68c036d 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 = <0x100000 0x7ff00000>;
+		linux,usable-memory = <0x000000 0x80000000>;
 	};
 
 	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 9a25988db68e..19db70b1e1ea 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 = <0x100000 0x3ff00000>;
+		linux,usable-memory = <0x000000 0x40000000>;
 
 	};
 
diff --git a/arch/arm/boot/dts/amlogic/g12a_s905y2_u221.dts b/arch/arm/boot/dts/amlogic/g12a_s905y2_u221.dts
index 94eed609b05e..caadd28dbe5d 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 = <0x100000 0x7ff00000>;
+		linux,usable-memory = <0x000000 0x80000000>;
 	};
 
 	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 e32bb762807f..af55b1cb15e4 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 = <0x100000 0x7ff00000>;
+		linux,usable-memory = <0x000000 0x80000000>;
 	};
 
 	reserved-memory {
diff --git a/arch/arm64/boot/dts/amlogic/g12a_s905d2_u200.dts b/arch/arm64/boot/dts/amlogic/g12a_s905d2_u200.dts
index 4ece6dae6907..05fa582e56e5 100644
--- a/arch/arm64/boot/dts/amlogic/g12a_s905d2_u200.dts
+++ b/arch/arm64/boot/dts/amlogic/g12a_s905d2_u200.dts
@@ -45,7 +45,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x0 0x100000 0x0 0x7ff00000>;
+		linux,usable-memory = <0x0 0x000000 0x0 0x80000000>;
 	};
 
 	reserved-memory {
diff --git a/arch/arm64/boot/dts/amlogic/g12a_s905d2_u200_1g.dts b/arch/arm64/boot/dts/amlogic/g12a_s905d2_u200_1g.dts
index fdcd550c82ce..e96a0d479608 100644
--- a/arch/arm64/boot/dts/amlogic/g12a_s905d2_u200_1g.dts
+++ b/arch/arm64/boot/dts/amlogic/g12a_s905d2_u200_1g.dts
@@ -45,7 +45,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x0 0x100000 0x0 0x3ff00000>;
+		linux,usable-memory = <0x0 0x000000 0x0 0x40000000>;
 	};
 
 	reserved-memory {
diff --git a/arch/arm64/boot/dts/amlogic/g12a_s905x2_u212.dts b/arch/arm64/boot/dts/amlogic/g12a_s905x2_u212.dts
index 4d19d6e2d0f1..2c6f2d3f0f53 100644
--- a/arch/arm64/boot/dts/amlogic/g12a_s905x2_u212.dts
+++ b/arch/arm64/boot/dts/amlogic/g12a_s905x2_u212.dts
@@ -45,7 +45,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x0 0x100000 0x0 0x7ff00000>;
+		linux,usable-memory = <0x0 0x000000 0x0 0x80000000>;
 	};
 
 	reserved-memory {
diff --git a/arch/arm64/boot/dts/amlogic/g12a_s905x2_u212_1g.dts b/arch/arm64/boot/dts/amlogic/g12a_s905x2_u212_1g.dts
index 77efdd7256a4..977ecc62e41c 100644
--- a/arch/arm64/boot/dts/amlogic/g12a_s905x2_u212_1g.dts
+++ b/arch/arm64/boot/dts/amlogic/g12a_s905x2_u212_1g.dts
@@ -45,7 +45,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x0 0x100000 0x0 0x3ff00000>;
+		linux,usable-memory = <0x0 0x000000 0x0 0x40000000>;
 
 	};
 
diff --git a/arch/arm64/boot/dts/amlogic/g12a_s905y2_u221.dts b/arch/arm64/boot/dts/amlogic/g12a_s905y2_u221.dts
index e016086d9d80..cec20dd0bf39 100644
--- a/arch/arm64/boot/dts/amlogic/g12a_s905y2_u221.dts
+++ b/arch/arm64/boot/dts/amlogic/g12a_s905y2_u221.dts
@@ -44,7 +44,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x0 0x100000 0x0 0x7ff00000>;
+		linux,usable-memory = <0x0 0x000000 0x0 0x80000000>;
 	};
 
 	reserved-memory {
diff --git a/arch/arm64/boot/dts/amlogic/g12b_a311d_w400.dts b/arch/arm64/boot/dts/amlogic/g12b_a311d_w400.dts
index 56217de805a1..30a09e5013bf 100644
--- a/arch/arm64/boot/dts/amlogic/g12b_a311d_w400.dts
+++ b/arch/arm64/boot/dts/amlogic/g12b_a311d_w400.dts
@@ -45,7 +45,7 @@
 
 	memory@00000000 {
 		device_type = "memory";
-		linux,usable-memory = <0x0 0x100000 0x0 0x7ff00000>;
+		linux,usable-memory = <0x0 0x000000 0x0 0x80000000>;
 	};
 
 	reserved-memory {