Hi,i am a beginner in MPU development. I have created cortex-M4 firmware project using stm32cubeide , but how can i start my firmware at the time of bootup?

[AGupt.8]

i have read the article, https://wiki.st.com/stm32mpu/wiki/How_to_start_the_coprocessor_from_the_bootloader#Starting_the_coprocessor_firmware

where will i find this in my device tree

#define CONFIG_EXTRA_ENV_SETTINGS \

"stdin=serial\0" \

"stdout=serial\0" \

"stderr=serial\0" \

...

BOOTENV \

"m4fw_name=rproc-m4-fw.elf\0" \

"m4fw_addr=${kernel_addr_r}\0" \

"boot_m4fw=rproc init; rproc load 0 ${m4fw_addr} ${filesize}; rproc start 0\0" \

"boot_m4_mmc0=if ext4load mmc 0:4 ${m4fw_addr} ${m4fw_name} ; then run boot_m4fw; fi;\0"

"bootcmd=run boot_m4_mmc0; run bootcmd_mmc0\0"

[Cindy_GE]

Hi,

You should add these line

"m4fw_name=rproc-m4-fw.elf\0" \

"m4fw_addr=${kernel_addr_r}\0" \

"boot_m4fw=rproc init; rproc load 0 ${m4fw_addr} ${filesize}; rproc start 0\0" \

"boot_m4_mmc0=if ext4load mmc 0:4 ${m4fw_addr} ${m4fw_name} ; then run boot_m4fw; fi;\0"

"bootcmd=run boot_m4_mmc0; run bootcmd_mmc0\0"

into <U-boot source code>/include/configs/stm32mp1.h, then re-compile/flash U-boot, bot the device tree.

[AGupt.8]

#define CONFIG_EXTRA_ENV_SETTINGS \

   "kernel_addr_r=0xc2000000\0" \

   "fdt_addr_r=0xc4000000\0" \

   "scriptaddr=0xc4100000\0" \

   "pxefile_addr_r=0xc4200000\0" \

   "splashimage=0xc4300000\0" \

   "ramdisk_addr_r=0xc4400000\0" \

   "altbootcmd=run bootcmd\0" \

   "env_check=if env info -p -d -q; then env save; fi\0" \

   STM32MP_BOOTCMD \

   BOOTENV \

       "m4fw_name=rproc-m4-fw_CM4.elf\0" \

       "m4fw_addr=${kernel_addr_r}\0" \

   "boot_m4fw=rproc init; rproc load 0 ${m4fw_addr} ${filesize}; rproc start 0\0" \

       "boot_m4_mmc0=if ext4load mmc 0:4 ${m4fw_addr} ${m4fw_name} ; then run boot_m4fw; fi;\0"

       "bootcmd=run boot_m4_mmc0; run bootcmd_mmc0\0"

i copied this in u-boot/include/configs/stm32mp1.h and tried compiling, but i am getting the below error

include/configs/stm32mp1.h:165:9: error: expected identifier or ‘(’ before string constant

 165 |        "bootcmd=run boot_m4_mmc0; run bootcmd_mmc0\0"

     |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

scripts/Makefile.build:155: recipe for target 'lib/asm-offsets.s' failed

make[1]: *** [lib/asm-offsets.s] Error 1

Makefile:1837: recipe for target 'prepare0' failed

make: *** [prepare0] Error 2

[Cindy_GE]

There should be one "\" ate the end of ​

 "boot_m4_mmc0=if ext4load mmc 0:4 ${m4fw_addr} ${m4fw_name} ; then run boot_m4fw; fi;\0" \

[AGupt.8]

a