boards: beagle: pocketbeagle_2: Support splitting code and data section

The M4F allows concurrent fetch for instruction code and data via dedicated
buses (I-Code and D-Code, respectively).

Signed-off-by: Ayush Singh <[email protected]>

Author: Ayush1325

boards/beagle/pocketbeagle_2/pocketbeagle_2_am6232_m4_defconfig

@@ -7,8 +7,9 @@
 # Platform Configuration
 CONFIG_CORTEX_M_SYSTICK=y
 
-# Zephyr Kernel Configuration
-CONFIG_XIP=n
+# XIP is required to place text and data sections in I-RAM and D-RAM
+# respectively.
+CONFIG_XIP=y
 
 # Serial Driver
 CONFIG_SERIAL=y

boards/beagle/pocketbeagle_2/pocketbeagle_2_am6254_m4_defconfig

@@ -7,8 +7,9 @@
 # Platform Configuration
 CONFIG_CORTEX_M_SYSTICK=y
 
-# Zephyr Kernel Configuration
-CONFIG_XIP=n
+# XIP is required to place text and data sections in I-RAM and D-RAM
+# respectively.
+CONFIG_XIP=y
 
 # Serial Driver
 CONFIG_SERIAL=y

boards/beagle/pocketbeagle_2/pocketbeagle_2_m4-common.dtsi

@@ -12,7 +12,11 @@
 	compatible = "beagle,pocketbeagle_2_m4";
 
 	chosen {
-		zephyr,sram = &sram0;
+		/* Split and place TEXT and DATA in I-RAM and D-RAM respectively. `sram_icode`
+		 * is a section in internal SRAM, not an external flash.
+		 */
+		zephyr,flash = &sram_icode;
+		zephyr,sram = &sram_dcode;
 		zephyr,console = &uart0;
 		zephyr,shell-uart = &uart0;
 		zephyr,ipc = &ipc0;