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Diffstat (limited to 'board/st')
| -rw-r--r-- | board/st/stm32mp1/README | 83 |
1 files changed, 59 insertions, 24 deletions
diff --git a/board/st/stm32mp1/README b/board/st/stm32mp1/README index 4adc978d1e..42a39d013e 100644 --- a/board/st/stm32mp1/README +++ b/board/st/stm32mp1/README @@ -115,7 +115,31 @@ the supported device trees for stm32mp157 are: + FSBL = spl/u-boot-spl.stm32 + SSBL = u-boot.img -6. Prepare an SDCard +6. Switch Setting for Boot Mode +=============================== + +You can select the boot mode, on the board ed1 with the switch SW1 + + ----------------------------------- + Boot Mode BOOT2 BOOT1 BOOT0 + ----------------------------------- + Reserved 0 0 0 + NOR 0 0 1 + SD-Card 1 1 1 + SD-Card 1 0 1 + eMMC 0 1 0 + NAND 0 1 1 + Recovery 1 1 0 + Recovery 0 0 0 + +Recovery is a boot from serial link (UART/USB) and it is used with +STM32CubeProgrammer tool to load executable in RAM and to update the flash +devices available on the board (NOR/NAND/eMMC/SDCARD). +The communication between HOST and board is based on +- for UARTs : the uart protocol used with all MCU STM32 +- for USB : based on USB DFU 1.1 (without the ST extensions used on MCU STM32) + +7. Prepare an SDCard =================== The minimal requirements for STMP32MP1 boot up to U-Boot are: @@ -147,13 +171,13 @@ for example: with gpt table with 128 entries # sgdisk -o /dev/<SDCard dev> b) create minimal image - # sgdisk --resize-table=128 -a 1 \ + # sgdisk --resize-table=128 -a 1 \ -n 1:34:545 -c 1:fsbl1 \ -n 2:546:1057 -c 2:fsbl2 \ -n 3:1058:5153 -c 3:ssbl \ -p /dev/<SDCard dev> - you can add other partition for kernel (rootfs) + you can add other partition for kernel (rootfs for example) c) copy the FSBL (2 times) and SSBL file on the correct partition. in this example in partition 1 to 3 @@ -163,29 +187,40 @@ for example: with gpt table with 128 entries # dd if=u-boot-spl.stm32 of=/dev/mmcblk0p2 # dd if=u-boot.img of=/dev/mmcblk0p3 -7. Switch Setting -================== - -You can select the boot mode, on the board ed1 with the switch SW1 +To boot from SDCard, select BootPinMode = 1 1 1 and reset. - ----------------------------------- - Boot Mode BOOT2 BOOT1 BOOT0 - ----------------------------------- - Reserved 0 0 0 - NOR 0 0 1 - SD-Card 1 1 1 - SD-Card 1 0 1 - eMMC 0 1 0 - NAND 0 1 1 - Recovery 1 1 0 - Recovery 0 0 0 +8. Prepare eMMC +=============== +You can use U-Boot to copy binary in eMMC. +In the next example, you need to boot from SDCARD and the images (u-boot-spl.stm32, u-boot.img) +are presents on SDCARD (mmc 0) in ext4 partition 4 (bootfs). To boot from SDCard, select BootPinMode = 1 1 1 and reset. -Recovery is a boot from serial link (UART/USB) and it is used with -STM32CubeProgrammer tool to load executable in RAM and to update the flash -devices available on the board (NOR/NAND/eMMC/SDCARD). -The communication between HOST and board is based on -- for UARTs : the uart protocol used with all MCU STM32 -- for USB : based on USB DFU 1.1 (without the ST extensions used on MCU STM32) +Then you update the eMMC with the next U-Boot command : + +a) prepare GPT on eMMC, + example with 2 partitions, bootfs and roots: + + # setenv emmc_part "name=ssbl,size=2MiB;name=bootfs,type=linux,bootable,size=64MiB;name=rootfs,type=linux,size=512" + # gpt write mmc 1 ${emmc_part} + +b) copy SPL on eMMC on firts boot partition + (SPL max size is 256kB, with LBA 512, 0x200) + + # ext4load mmc 0:4 0xC0000000 u-boot-spl.stm32 + # mmc dev 1 + # mmc partconf 1 1 1 1 + # mmc write ${fileaddr} 0 200 + # mmc partconf 1 1 1 0 + +b) copy U-Boot in first GPT partition of eMMC + + # ext4load mmc 0:4 0xC0000000 u-boot.img + # mmc dev 1 + # part start mmc 1 1 partstart + # part size mmc 1 1 partsize + # mmc write ${fileaddr} ${partstart} ${partsize} + +To boot from eMMC, select BootPinMode = 0 1 0 and reset. |