Add information for remoteproc usage to load firmware in M4 coprocessor on stm32mp157.
Signed-off-by: Patrick Delaunay patrick.delaunay@st.com ---
board/st/stm32mp1/README | 36 ++++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-)
diff --git a/board/st/stm32mp1/README b/board/st/stm32mp1/README index 428357c..c807e08 100644 --- a/board/st/stm32mp1/README +++ b/board/st/stm32mp1/README @@ -139,7 +139,6 @@ the supported device trees for stm32mp157 are:
# make DEVICE_TREE=<name> all
- example: a) trusted boot on ev1 # export KBUILD_OUTPUT=stm32mp15_trusted @@ -190,7 +189,7 @@ the supported device trees for stm32mp157 are: 6. Switch Setting for Boot Mode ===============================
-You can select the boot mode, on the board ed1 with the switch SW1 +You can select the boot mode, on the board with one switch :
- on the daugther board ed1 with the switch SW1 : BOOT0, BOOT1, BOOT2
@@ -358,3 +357,36 @@ on bank 0 to access to internal OTP: 4 check env update STM32MP> print ethaddr ethaddr=12:34:56:78:9a:bc + +10. Coprocessor firmware +======================== + +U-Boot can boot the coprocessor before the kernel (coprocessor early boot). + +A/ Manuallly by using rproc commands (update the bootcmd) + Configurations + # env set name_copro "rproc-m4-fw.elf" + # env set dev_copro 0 + # env set loadaddr_copro 0xC1000000 + + Load binary from bootfs partition (number 4) on SDCard (mmc 0) + # ext4load mmc 0:4 ${loadaddr_copro} ${name_copro} + => ${filesize} updated with the size of the loaded file + + Start M4 firmware with remote proc command + # rproc init + # rproc load ${dev_copro} ${loadaddr_copro} ${filesize} + # rproc start ${dev_copro} + +B/ Automatically by using FIT feature and generic DISTRO bootcmd + + see examples in this directory : + + Generate FIT including kernel + device tree + M4 firmware + with cfg with M4 boot + $> mkimage -f fit_copro_kernel_dtb.its fit_copro_kernel_dtb.itb + + Then using DISTRO configuration file: see extlinux.conf to select + the correct configuration + => stm32mp157c-ev1-m4 + => stm32mp157c-dk2-m4