add support for nordic nrf54lm20

CMakeLists.txt

@@ -394,6 +394,7 @@ if(NOT DEFINED ARM_TARGETS)
                             nrf52840
                             nrf5340
                             nrf5340_net
+                            nrf54lm20
                             rp2350
                             sama5d3
                             same51

Makefile

@@ -28,6 +28,7 @@ BIG_ENDIAN?=0
 USE_GCC?=1
 USE_GCC_HEADLESS?=1
 FLASH_OTP_KEYSTORE?=0
+SUPPORT_DEV_BOARD?=0
 BOOTLOADER_PARTITION_SIZE?=$$(( $(WOLFBOOT_PARTITION_BOOT_ADDRESS) - $(ARCH_FLASH_OFFSET)))
 
 OBJS:= \
@@ -163,6 +164,12 @@ include arch.mk
 # Parse config options
 include options.mk
 
+ifeq ($(SUPPORT_DEV_BOARD),1)
+    ifeq ($(TARGET),nrf54lm20)
+	     OBJS+=./hal/nrf54lm20_dk.o
+    endif
+endif
+
 OBJS+=$(WOLFCRYPT_OBJS)
 OBJS+=$(PUBLIC_KEY_OBJS)
 OBJS+=$(WOLFHSM_OBJS)

config/examples/nrf54lm20.config

@@ -0,0 +1,64 @@
+ARCH?=ARM
+TZEN?=0
+TARGET?=nrf54lm20
+SIGN?=ECC384
+HASH?=SHA384
+WOLFBOOT_VERSION?=1
+VTOR?=1
+CORTEX_M0?=0
+CORTEX_M33?=1
+NO_ASM?=0
+NO_MPU=1
+ALLOW_DOWNGRADE?=0
+NVM_FLASH_WRITEONCE?=0
+DELTA_UPDATES?=1
+SUPPORT_DEV_BOARD?=1
+
+SPMATH?=1
+RAM_CODE?=1
+
+DUALBANK_SWAP?=0
+FLAGS_HOME=0
+DISABLE_BACKUP=0
+EXT_FLASH?=0
+SPI_FLASH?=0
+QSPI_FLASH?=0
+UART_FLASH?=0
+
+# Flash is 4KB pages
+WOLFBOOT_SECTOR_SIZE?=0x1000
+
+# Reserve the first 64KB of internal flash for wolfBoot itself
+WOLFBOOT_PARTITION_BOOT_ADDRESS?=0x10000
+
+# Application partition spans the remainder of the 2MB internal flash
+# (2048K - 64K - 4K) / 2 = 990K = 0xF7800
+WOLFBOOT_PARTITION_SIZE?=0xF7800
+
+# Flash offset for application update image
+# (64K + 990K) = 1054K = 0x107800
+WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x107800
+
+# Flash offset for swap area
+# (2048K - 4K) = 2044K = 0x1FF000
+WOLFBOOT_PARTITION_SWAP_ADDRESS?=0x1FF000
+
+V?=0
+DEBUG?=0
+DEBUG_UART?=1
+USE_GCC=1
+OPTIMIZATION_LEVEL=2
+
+# Use larger block size for swapping sectors (performance improvement)
+CFLAGS_EXTRA+=-DFLASHBUFFER_SIZE=0x1000
+
+# Map debug UART to DK connector (override as needed)
+#CFLAGS_EXTRA+=-DUART_PORT=0 -DUART_PIN=20
+
+# SPI flash hookup for the DK radio shield
+#CFLAGS_EXTRA+=-DSPI_CS_PORT=0  -DSPI_CS_PIN=25
+#CFLAGS_EXTRA+=-DSPI_SCK_PORT=0 -DSPI_SCK_PIN=29
+#CFLAGS_EXTRA+=-DSPI_MOSI_PORT=0 -DSPI_MOSI_PIN=28
+#CFLAGS_EXTRA+=-DSPI_MISO_PORT=0 -DSPI_MISO_PIN=27
+
+#CFLAGS_EXTRA+=-DDEBUG_FLASH