| STMicroelectronics STM32MP1 |
| =========================== |
| |
| STM32MP1 is a microprocessor designed by STMicroelectronics |
| based on Arm Cortex-A7. |
| It is an Armv7-A platform, using dedicated code from TF-A. |
| More information can be found on `STM32MP1 Series`_ page. |
| |
| |
| STM32MP1 Versions |
| ----------------- |
| |
| There are 2 variants for STM32MP1: STM32MP13 and STM32MP15 |
| |
| STM32MP13 Versions |
| ~~~~~~~~~~~~~~~~~~ |
| The STM32MP13 series is available in 3 different lines which are pin-to-pin compatible: |
| |
| - STM32MP131: Single Cortex-A7 core |
| - STM32MP133: STM32MP131 + 2*CAN, ETH2(GMAC), ADC1 |
| - STM32MP135: STM32MP133 + DCMIPP, LTDC |
| |
| Each line comes with a security option (cryptography & secure boot) and a Cortex-A frequency option: |
| |
| - A Cortex-A7 @ 650 MHz |
| - C Secure Boot + HW Crypto + Cortex-A7 @ 650 MHz |
| - D Cortex-A7 @ 900 MHz |
| - F Secure Boot + HW Crypto + Cortex-A7 @ 900 MHz |
| |
| STM32MP15 Versions |
| ~~~~~~~~~~~~~~~~~~ |
| The STM32MP15 series is available in 3 different lines which are pin-to-pin compatible: |
| |
| - STM32MP157: Dual Cortex-A7 cores, Cortex-M4 core @ 209 MHz, 3D GPU, DSI display interface and CAN FD |
| - STM32MP153: Dual Cortex-A7 cores, Cortex-M4 core @ 209 MHz and CAN FD |
| - STM32MP151: Single Cortex-A7 core, Cortex-M4 core @ 209 MHz |
| |
| Each line comes with a security option (cryptography & secure boot) and a Cortex-A frequency option: |
| |
| - A Basic + Cortex-A7 @ 650 MHz |
| - C Secure Boot + HW Crypto + Cortex-A7 @ 650 MHz |
| - D Basic + Cortex-A7 @ 800 MHz |
| - F Secure Boot + HW Crypto + Cortex-A7 @ 800 MHz |
| |
| The `STM32MP1 part number codification`_ page gives more information about part numbers. |
| |
| Design |
| ------ |
| The STM32MP1 resets in the ROM code of the Cortex-A7. |
| The primary boot core (core 0) executes the boot sequence while |
| secondary boot core (core 1) is kept in a holding pen loop. |
| The ROM code boot sequence loads the TF-A binary image from boot device |
| to embedded SRAM. |
| |
| The TF-A image must be properly formatted with a STM32 header structure |
| for ROM code is able to load this image. |
| Tool stm32image can be used to prepend this header to the generated TF-A binary. |
| |
| Boot with FIP |
| ~~~~~~~~~~~~~ |
| The use of FIP is now the recommended way to boot STM32MP1 platform. |
| Only BL2 (with STM32 header) is loaded by ROM code. The other binaries are |
| inside the FIP binary: BL32 (SP_min or OP-TEE), U-Boot and their respective |
| device tree blobs. |
| |
| |
| Memory mapping |
| ~~~~~~~~~~~~~~ |
| |
| :: |
| |
| 0x00000000 +-----------------+ |
| | | ROM |
| 0x00020000 +-----------------+ |
| | | |
| | ... | |
| | | |
| 0x2FFC0000 +-----------------+ \ |
| | BL32 DTB | | |
| 0x2FFC5000 +-----------------+ | |
| | BL32 | | |
| 0x2FFDF000 +-----------------+ | |
| | ... | | |
| 0x2FFE3000 +-----------------+ | |
| | BL2 DTB | | Embedded SRAM |
| 0x2FFEA000 +-----------------+ | |
| | BL2 | | |
| 0x2FFFF000 +-----------------+ | |
| | SCMI mailbox | | |
| 0x30000000 +-----------------+ / |
| | | |
| | ... | |
| | | |
| 0x40000000 +-----------------+ |
| | | |
| | | Devices |
| | | |
| 0xC0000000 +-----------------+ \ |
| | | | |
| 0xC0100000 +-----------------+ | |
| | BL33 | | Non-secure RAM (DDR) |
| | ... | | |
| | | | |
| 0xFFFFFFFF +-----------------+ / |
| |
| |
| Boot sequence |
| ~~~~~~~~~~~~~ |
| |
| ROM code -> BL2 (compiled with BL2_AT_EL3) -> BL32 (SP_min) -> BL33 (U-Boot) |
| |
| or if Op-TEE is used: |
| |
| ROM code -> BL2 (compiled with BL2_AT_EL3) -> OP-TEE -> BL33 (U-Boot) |
| |
| |
| Build Instructions |
| ------------------ |
| Boot media(s) supported by BL2 must be specified in the build command. |
| Available storage medias are: |
| |
| - ``STM32MP_SDMMC`` |
| - ``STM32MP_EMMC`` |
| - ``STM32MP_RAW_NAND`` |
| - ``STM32MP_SPI_NAND`` |
| - ``STM32MP_SPI_NOR`` |
| |
| Serial boot devices: |
| |
| - ``STM32MP_UART_PROGRAMMER`` |
| - ``STM32MP_USB_PROGRAMMER`` |
| |
| |
| Other configuration flags: |
| |
| - | ``DTB_FILE_NAME``: to precise board device-tree blob to be used. |
| | Default: stm32mp157c-ev1.dtb |
| - | ``DWL_BUFFER_BASE``: the 'serial boot' load address of FIP, |
| | default location (end of the first 128MB) is used when absent |
| - | ``STM32MP_EARLY_CONSOLE``: to enable early traces before clock driver is setup. |
| | Default: 0 (disabled) |
| - | ``STM32MP_RECONFIGURE_CONSOLE``: to re-configure crash console (especially after BL2). |
| | Default: 0 (disabled) |
| - | ``STM32MP_UART_BAUDRATE``: to select UART baud rate. |
| | Default: 115200 |
| - | ``STM32_TF_VERSION``: to manage BL2 monotonic counter. |
| | Default: 0 |
| - | ``STM32MP13``: to select STM32MP13 variant configuration. |
| | Default: 0 |
| - | ``STM32MP15``: to select STM32MP15 variant configuration. |
| | Default: 1 |
| |
| |
| Boot with FIP |
| ~~~~~~~~~~~~~ |
| You need to build BL2, BL32 (SP_min or OP-TEE) and BL33 (U-Boot) before building FIP binary. |
| |
| U-Boot |
| ______ |
| |
| .. code:: bash |
| |
| cd <u-boot_directory> |
| make stm32mp15_trusted_defconfig |
| make DEVICE_TREE=stm32mp157c-ev1 all |
| |
| OP-TEE (optional) |
| _________________ |
| |
| .. code:: bash |
| |
| cd <optee_directory> |
| make CROSS_COMPILE=arm-linux-gnueabihf- ARCH=arm PLATFORM=stm32mp1 \ |
| CFG_EMBED_DTB_SOURCE_FILE=stm32mp157c-ev1.dts |
| |
| |
| TF-A BL32 (SP_min) |
| __________________ |
| If you choose not to use OP-TEE, you can use TF-A SP_min. |
| To build TF-A BL32, and its device tree file: |
| |
| .. code:: bash |
| |
| make CROSS_COMPILE=arm-none-eabi- PLAT=stm32mp1 ARCH=aarch32 ARM_ARCH_MAJOR=7 \ |
| AARCH32_SP=sp_min DTB_FILE_NAME=stm32mp157c-ev1.dtb bl32 dtbs |
| |
| TF-A BL2 |
| ________ |
| To build TF-A BL2 with its STM32 header for SD-card boot: |
| |
| .. code:: bash |
| |
| make CROSS_COMPILE=arm-none-eabi- PLAT=stm32mp1 ARCH=aarch32 ARM_ARCH_MAJOR=7 \ |
| DTB_FILE_NAME=stm32mp157c-ev1.dtb STM32MP_SDMMC=1 |
| |
| For other boot devices, you have to replace STM32MP_SDMMC in the previous command |
| with the desired device flag. |
| |
| This BL2 is independent of the BL32 used (SP_min or OP-TEE) |
| |
| |
| FIP |
| ___ |
| With BL32 SP_min: |
| |
| .. code:: bash |
| |
| make CROSS_COMPILE=arm-none-eabi- PLAT=stm32mp1 ARCH=aarch32 ARM_ARCH_MAJOR=7 \ |
| AARCH32_SP=sp_min \ |
| DTB_FILE_NAME=stm32mp157c-ev1.dtb \ |
| BL33=<u-boot_directory>/u-boot-nodtb.bin \ |
| BL33_CFG=<u-boot_directory>/u-boot.dtb \ |
| fip |
| |
| With OP-TEE: |
| |
| .. code:: bash |
| |
| make CROSS_COMPILE=arm-none-eabi- PLAT=stm32mp1 ARCH=aarch32 ARM_ARCH_MAJOR=7 \ |
| AARCH32_SP=optee \ |
| DTB_FILE_NAME=stm32mp157c-ev1.dtb \ |
| BL33=<u-boot_directory>/u-boot-nodtb.bin \ |
| BL33_CFG=<u-boot_directory>/u-boot.dtb \ |
| BL32=<optee_directory>/tee-header_v2.bin \ |
| BL32_EXTRA1=<optee_directory>/tee-pager_v2.bin |
| BL32_EXTRA2=<optee_directory>/tee-pageable_v2.bin |
| fip |
| |
| Trusted Boot Board |
| __________________ |
| |
| .. code:: shell |
| |
| tools/cert_create/cert_create -n --rot-key "build/stm32mp1/debug/rot_key.pem" \ |
| --tfw-nvctr 0 \ |
| --ntfw-nvctr 0 \ |
| --key-alg ecdsa --hash-alg sha256 \ |
| --trusted-key-cert build/stm32mp1/cert_images/trusted-key-cert.key-crt \ |
| --tos-fw <optee_directory>/tee-header_v2.bin \ |
| --tos-fw-extra1 <optee_directory>/tee-pager_v2.bin \ |
| --tos-fw-extra2 <optee_directory>/tee-pageable_v2.bin \ |
| --tos-fw-cert build/stm32mp1/cert_images/tee-header_v2.bin.crt \ |
| --tos-fw-key-cert build/stm32mp1/cert_images/tee-header_v2.bin.key-crt \ |
| --nt-fw <u-boot_directory>/u-boot-nodtb.bin \ |
| --nt-fw-cert build/stm32mp1/cert_images/u-boot.bin.crt \ |
| --nt-fw-key-cert build/stm32mp1/cert_images/u-boot.bin.key-crt \ |
| --hw-config <u-boot_directory>/u-boot.dtb \ |
| --fw-config build/stm32mp1/debug/fdts/fw-config.dtb \ |
| --stm32mp-cfg-cert build/stm32mp1/cert_images/stm32mp_cfg_cert.crt |
| |
| tools/fiptool/fiptool create --tos-fw <optee_directory>/tee-header_v2.bin \ |
| --tos-fw-extra1 <optee_directory>/tee-pager_v2.bin \ |
| --tos-fw-extra2 <optee_directory>/tee-pageable_v2.bin \ |
| --nt-fw <u-boot_directory>/u-boot-nodtb.bin \ |
| --hw-config <u-boot_directory>/u-boot.dtb \ |
| --fw-config build/stm32mp1/debug/fdts/fw-config.dtb \ |
| --tos-fw-cert build/stm32mp1/cert_images/tee-header_v2.bin.crt \ |
| --tos-fw-key-cert build/stm32mp1/cert_images/tee-header_v2.bin.key-crt \ |
| --nt-fw-cert build/stm32mp1/cert_images/u-boot.bin.crt \ |
| --nt-fw-key-cert build/stm32mp1/cert_images/u-boot.bin.key-crt \ |
| --stm32mp-cfg-cert build/stm32mp1/cert_images/stm32mp_cfg_cert.crt stm32mp1.fip |
| |
| |
| |
| Populate SD-card |
| ---------------- |
| |
| Boot with FIP |
| ~~~~~~~~~~~~~ |
| The SD-card has to be formatted with GPT. |
| It should contain at least those partitions: |
| |
| - fsbl: to copy the tf-a-stm32mp157c-ev1.stm32 binary (BL2) |
| - fip: which contains the FIP binary |
| |
| Usually, two copies of fsbl are used (fsbl1 and fsbl2) instead of one partition fsbl. |
| |
| |
| .. _STM32MP1 Series: https://www.st.com/en/microcontrollers-microprocessors/stm32mp1-series.html |
| .. _STM32MP1 part number codification: https://wiki.st.com/stm32mpu/wiki/STM32MP15_microprocessor#Part_number_codification |