boards: nordic: bm_nrf54l15dk: sram adjustments

Adjust sram sizes to not overlap with Viper context.

Signed-off-by: Eivind Jølsgard <eivind.jolsgard@nordicsemi.no>

Author: eivindj-nordic

boards/nordic/bm_nrf54l15dk/bm_nrf54l15dk_nrf54l15_cpuapp_common.dtsi

@@ -25,8 +25,12 @@
 			compatible = "mmio-sram";
 			#address-cells = <1>;
 			#size-cells = <1>;
-			reg = <0x20000080 (DT_SIZE_K(256) - 0x80)>;
-			ranges = <0x0 0x20000080 (DT_SIZE_K(256) - 0x80)>;
+			/* Size reduced by 0x80 bytes to account for the start address offset.
+			 * As total size of SRAM is not 1kB aligned,
+			 * 0x200 bytes are added to the 255 kB.
+			 */
+			reg = <0x20000080 (DT_SIZE_K(255) - 0x80 + 0x200)>;
+			ranges = <0x0 0x20000080 (DT_SIZE_K(255) - 0x80 + 0x200)>;
 		};
 	};
 

boards/nordic/bm_nrf54l15dk/bm_nrf54l15dk_nrf54l15_cpuapp_s115_softdevice.dts

@@ -71,6 +71,6 @@
 
 	app_ram: sram@4380 {
 		label = "app_ram";
-		reg = <0x4380 DT_SIZE_K(238)>;
+		reg = <0x4380 (DT_SIZE_K(238) + 0x200)>;
 	};
 };

boards/nordic/bm_nrf54l15dk/bm_nrf54l15dk_nrf54l15_cpuapp_s115_softdevice_mcuboot.dts

@@ -97,11 +97,12 @@
 &cpuapp_sram {
 	status = "okay";
 
-	/* Override setting in bm_nrf54l15dk_nrf54l15_cpuapp_common.dtsi
+	/* Override setting in bm_nrf54lv10dk_nrf54lv10a_cpuapp_common.dtsi
 	 * to adjust sram size to not overlap with retainedmem
+	 * (here we ignore the extra 512 bytes at the top end)
 	 */
-	reg = <0x20000080 (DT_SIZE_K(256) - DT_SIZE_K(1) - 0x80)>;
-	ranges = <0x0 0x20000080 (DT_SIZE_K(256) - DT_SIZE_K(1) - 0x80)>;
+	reg = <0x20000080 (DT_SIZE_K(255) - DT_SIZE_K(1) - 0x80)>;
+	ranges = <0x0 0x20000080 (DT_SIZE_K(255) - DT_SIZE_K(1) - 0x80)>;
 
 	softdevice_static_ram: sram@0 {
 		label = "softdevice_static_ram";
@@ -115,6 +116,6 @@
 
 	app_ram: sram@4380 {
 		label = "app_ram";
-		reg = <0x4380 DT_SIZE_K(238)>;
+		reg = <0x4380 DT_SIZE_K(237)>;
 	};
 };

boards/nordic/bm_nrf54l15dk/bm_nrf54l15dk_nrf54l15_cpuapp_s145_softdevice.dts

@@ -71,6 +71,6 @@
 
 	app_ram: sram@4780 {
 		label = "app_ram";
-		reg = <0x4780 DT_SIZE_K(237)>;
+		reg = <0x4780 (DT_SIZE_K(237) + 0x200)>;
 	};
 };

boards/nordic/bm_nrf54l15dk/bm_nrf54l15dk_nrf54l15_cpuapp_s145_softdevice_mcuboot.dts

@@ -99,11 +99,12 @@
 &cpuapp_sram {
 	status = "okay";
 
-	/* Override setting in bm_nrf54l15dk_nrf54l15_cpuapp_common.dtsi
+	/* Override setting in bm_nrf54lv10dk_nrf54lv10a_cpuapp_common.dtsi
 	 * to adjust sram size to not overlap with retainedmem
+	 * (here we ignore the extra 512 bytes at the top end)
 	 */
-	reg = <0x20000080 (DT_SIZE_K(256) - DT_SIZE_K(1) - 0x80)>;
-	ranges = <0x0 0x20000080 (DT_SIZE_K(256) - DT_SIZE_K(1) - 0x80)>;
+	reg = <0x20000080 (DT_SIZE_K(255) - DT_SIZE_K(1) - 0x80)>;
+	ranges = <0x0 0x20000080 (DT_SIZE_K(255) - DT_SIZE_K(1) - 0x80)>;
 
 	softdevice_static_ram: sram@0 {
 		label = "softdevice_static_ram";
@@ -117,6 +118,6 @@
 
 	app_ram: sram@4780 {
 		label = "app_ram";
-		reg = <0x4780 DT_SIZE_K(237)>;
+		reg = <0x4780 DT_SIZE_K(236)>;
 	};
 };

doc/nrf-bm/release_notes/release_notes_changelog.rst

@@ -39,6 +39,7 @@ Boards
 
 * Added experimental support for PCA10188 (`nRF54LV10 DK`_)
 * Disabled all Peripheral Resource Sharing (PRS) boxes for the ``bm_nrf54l15dk`` board variants.
+* Adjusted sram sizes for the ``bm_nrf54l15dk`` to not overlap with Viper context.
 
 Build system
 ============