board: s32z2xxdc2: allow the code to be executed from code RAM

- Trace32 runner: no need to configure TE bit in CFG_CORE
register in the cmm start-up script, it can be configured
at Zephyr start-up code when required (via SCTRL register)

- MPU static regions also needs to be updated for XIP and
non-XIP

Signed-off-by: Dat Nguyen Duy <dat.nguyenduy@nxp.com>

boards/nxp/s32z2xxdc2/Kconfig.defconfig

@@ -30,4 +30,20 @@ config NET_L2_ETHERNET
 
 endif # NETWORKING
 
+if XIP
+# Offset between CRAM AXIM and CRAM AXIF, code will be downloaded
+# over AXIM interface
+config BUILD_OUTPUT_ADJUST_LMA
+	default "-0x47800000"
+
+config CPU_CORTEX_R52_CACHE_SEGREGATION
+	default y
+
+config CPU_CORTEX_R52_ICACHE_FLASH_WAY
+	default 4
+
+config CPU_CORTEX_R52_DCACHE_FLASH_WAY
+	default 1
+endif # XIP
+
 endif # BOARD_S32Z2XXDC2_S32Z270_RTU0 || BOARD_S32Z2XXDC2_S32Z270_RTU1

boards/nxp/s32z2xxdc2/s32z2xxdc2_s32z270_rtu0_defconfig

@@ -1,7 +1,7 @@
 # Copyright 2022,2024 NXP
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_XIP=n
+CONFIG_XIP=y
 CONFIG_ISR_STACK_SIZE=512
 CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000
 CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=8000000

boards/nxp/s32z2xxdc2/s32z2xxdc2_s32z270_rtu1_defconfig

@@ -1,7 +1,7 @@
 # Copyright 2022,2024 NXP
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_XIP=n
+CONFIG_XIP=y
 CONFIG_ISR_STACK_SIZE=512
 CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000
 CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=8000000

boards/nxp/s32z2xxdc2/support/startup.cmm

@@ -20,20 +20,17 @@
 ;                  - Core0 and Core2 (redundancy) operate as a lockstep pair   *
 ;                  - Core1 and Core3 (redundancy) operate as a lockstep pair   *
 ;                 default: yes                                                 *
-;   - thumb       set to "yes" to select the T32 instruction set at reset      *
-;                 default: no                                                 *
 ;                                                                              *
 ;*******************************************************************************
 
 ENTRY %LINE &args
-LOCAL &rtuStartAddr &cfgCoreAddr &coreId &rtuId &thumbBit &spltLckBit
+LOCAL &rtuStartAddr &cfgCoreAddr &coreId &rtuId &spltLckBit
 
 &command=STRing.SCANAndExtract("&args","command=","debug")
 &elfFile=STRing.SCANAndExtract("&args","elfFile=","")
 &rtu=STRing.SCANAndExtract("&args","rtu=","0")
 &core=STRing.SCANAndExtract("&args","core=","0")
 &lockstep=STRing.SCANAndExtract("&args","lockstep=","yes")
-&thumb=STRing.SCANAndExtract("&args","thumb=","no")
 
 IF ("&elfFile"=="")
 (
@@ -59,12 +56,6 @@ IF (&core<0||&core>3)
   ENDDO
 )
 
-; select ARMv8 instruction set at reset for all Cortex-R52 cores (CFG_CORE.THUMB bit)
-IF ("&thumb"=="yes")
-  &thumbBit="1"
-ELSE
-  &thumbBit="0"
-
 ; select lock-step or split-lock mode (CFG_CORE.SPLT_LCK bit)
 IF ("&lockstep"=="yes")
   &spltLckBit="0"
@@ -126,8 +117,8 @@ GOSUB EnableRTU1
 ; Init RTU SRAM
 DO ~~/demo/arm/hardware/s32z27/misc/s32z27_init_rtu&(rtu)_sram.cmm
 
-; Set reset value for TE bit and split-lock mode
-Data.Set EZAXI:&cfgCoreAddr %Long 0yXXXXxxxxXXXXxxxxXXXXxxxxXXXXx&(thumbBit)x&(spltLckBit)  ; CFG_CORE
+; Set reset value for split-lock mode
+Data.Set EZAXI:&cfgCoreAddr %Long 0yXXXXxxxxXXXXxxxxXXXXxxxxXXXXxxx&(spltLckBit)  ; CFG_CORE
 
 ; Write loop to self instruction
 Data.Set EAXI:&rtuStartAddr %Long 0xFFFEF7FF

soc/nxp/s32/s32ze/mpu_regions.c

@@ -11,20 +11,25 @@
 #define DEVICE_REGION_END   0x76FFFFFFUL
 
 static const struct arm_mpu_region mpu_regions[] = {
-	MPU_REGION_ENTRY("vector",
-			 (uintptr_t)_vector_start,
-			 REGION_RAM_TEXT_ATTR((uintptr_t)_vector_end)),
-
 	MPU_REGION_ENTRY("SRAM_TEXT",
-			 (uintptr_t)__text_region_start,
+			 (uintptr_t)__rom_region_start,
 			 REGION_RAM_TEXT_ATTR((uintptr_t)__rodata_region_start)),
 
 	MPU_REGION_ENTRY("SRAM_RODATA",
 			 (uintptr_t)__rodata_region_start,
-			 REGION_RAM_RO_ATTR((uintptr_t)__rodata_region_end)),
+#ifdef CONFIG_XIP
+			 REGION_RAM_RO_ATTR(CONFIG_FLASH_BASE_ADDRESS + KB(CONFIG_FLASH_SIZE))
+#else
+			 REGION_RAM_RO_ATTR((uintptr_t)__rodata_region_end)
+#endif
+			 ),
 
 	MPU_REGION_ENTRY("SRAM_DATA",
+#ifdef CONFIG_XIP
+			 (uintptr_t)_image_ram_start,
+#else
 			 (uintptr_t)__rom_region_end,
+#endif
 			 REGION_RAM_ATTR((uintptr_t)__kernel_ram_end)),
 
 	MPU_REGION_ENTRY("DEVICE",