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https://github.com/AsahiLinux/u-boot
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We have duplication of sources which makes it hard to sustain across the board, but at the same time, we'd like to ensure readers get specific information without having to cross refer to different documentation to get piecemeal information that they need to put together. Reviewed-by: Neha Malcom Francis <n-francis@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com> Signed-off-by: Nishanth Menon <nm@ti.com>
376 lines
17 KiB
ReStructuredText
376 lines
17 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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.. sectionauthor:: Lokesh Vutla <lokeshvutla@ti.com>
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J721E Platforms
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===============
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Introduction:
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-------------
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The J721e family of SoCs are part of K3 Multicore SoC architecture platform
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targeting automotive applications. They are designed as a low power, high
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performance and highly integrated device architecture, adding significant
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enhancement on processing power, graphics capability, video and imaging
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processing, virtualization and coherent memory support.
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The device is partitioned into three functional domains, each containing
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specific processing cores and peripherals:
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1. Wake-up (WKUP) domain:
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* Device Management and Security Controller (DMSC)
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2. Microcontroller (MCU) domain:
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* Dual Core ARM Cortex-R5F processor
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3. MAIN domain:
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* Dual core 64-bit ARM Cortex-A72
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* 2 x Dual cortex ARM Cortex-R5 subsystem
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* 2 x C66x Digital signal processor sub system
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* C71x Digital signal processor sub-system with MMA.
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More info can be found in TRM: http://www.ti.com/lit/pdf/spruil1
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Boot Flow:
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----------
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Boot flow is similar to that of AM65x SoC and extending it with remoteproc
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support. Below is the pictorial representation of boot flow:
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.. code-block:: text
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+------------------------------------------------------------------------+-----------------------+
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| DMSC | MCU R5 | A72 | MAIN R5/C66x/C7x |
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+------------------------------------------------------------------------+-----------------------+
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| +--------+ | | | |
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| | Reset | | | | |
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| +--------+ | | | |
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| : | | | |
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| +--------+ | +-----------+ | | |
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| | *ROM* |----------|-->| Reset rls | | | |
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| +--------+ | +-----------+ | | |
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| | | | : | | |
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| | ROM | | : | | |
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| |services| | : | | |
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| | | | +-------------+ | | |
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| | | | | *R5 ROM* | | | |
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| | | | +-------------+ | | |
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| | |<---------|---|Load and auth| | | |
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| | | | | tiboot3.bin | | | |
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| | | | +-------------+ | | |
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| | | | : | | |
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| | | | : | | |
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| | | | : | | |
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| | | | +-------------+ | | |
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| | | | | *R5 SPL* | | | |
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| | | | +-------------+ | | |
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| | | | | Load | | | |
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| | | | | sysfw.itb | | | |
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| | Start | | +-------------+ | | |
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| | System |<---------|---| Start | | | |
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| |Firmware| | | SYSFW | | | |
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| +--------+ | +-------------+ | | |
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| : | | | | | |
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| +---------+ | | Load | | | |
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| | *SYSFW* | | | system | | | |
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| +---------+ | | Config data | | | |
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| | |<--------|---| | | | |
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| | | | +-------------+ | | |
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| | | | | DDR | | | |
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| | | | | config | | | |
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| | | | +-------------+ | | |
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| | | | | Load | | | |
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| | | | | tispl.bin | | | |
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| | | | +-------------+ | | |
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| | | | | Load R5 | | | |
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| | | | | firmware | | | |
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| | | | +-------------+ | | |
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| | |<--------|---| Start A72 | | | |
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| | | | | and jump to | | | |
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| | | | | DM fw image | | | |
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| | | | +-------------+ | | |
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| | | | | +-----------+ | |
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| | |---------|-----------------------|---->| Reset rls | | |
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| | | | | +-----------+ | |
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| | TIFS | | | : | |
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| |Services | | | +-------------+ | |
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| | |<--------|-----------------------|---->|*TF-A/OP-TEE*| | |
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| | | | | +-------------+ | |
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| | | | | : | |
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| | | | | +-----------+ | |
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| | |<--------|-----------------------|---->| *A72 SPL* | | |
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| | | | | +-----------+ | |
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| | | | | | Load | | |
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| | | | | | u-boot.img| | |
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| | | | | +-----------+ | |
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| | | | | : | |
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| | | | | +-----------+ | |
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| | |<--------|-----------------------|---->| *U-Boot* | | |
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| | | | | +-----------+ | |
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| | | | | | prompt | | |
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| | | | | +-----------+ | |
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| | | | | | Load R5 | | |
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| | | | | | Firmware | | |
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| | | | | +-----------+ | |
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| | |<--------|-----------------------|-----| Start R5 | | +-----------+ |
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| | |---------|-----------------------|-----+-----------+-----|----->| R5 starts | |
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| | | | | | Load C6 | | +-----------+ |
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| | | | | | Firmware | | |
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| | | | | +-----------+ | |
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| | |<--------|-----------------------|-----| Start C6 | | +-----------+ |
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| | |---------|-----------------------|-----+-----------+-----|----->| C6 starts | |
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| | | | | | Load C7 | | +-----------+ |
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| | | | | | Firmware | | |
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| | | | | +-----------+ | |
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| | |<--------|-----------------------|-----| Start C7 | | +-----------+ |
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| | |---------|-----------------------|-----+-----------+-----|----->| C7 starts | |
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| +---------+ | | | +-----------+ |
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+------------------------------------------------------------------------+-----------------------+
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- Here DMSC acts as master and provides all the critical services. R5/A72
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requests DMSC to get these services done as shown in the above diagram.
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Sources:
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--------
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.. include:: k3.rst
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:start-after: .. k3_rst_include_start_boot_sources
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:end-before: .. k3_rst_include_end_boot_sources
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Build procedure:
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----------------
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1. Trusted Firmware-A:
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.. code-block:: bash
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$ make CROSS_COMPILE=aarch64-linux-gnu- ARCH=aarch64 PLAT=k3 \
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TARGET_BOARD=generic SPD=opteed
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2. OP-TEE:
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.. code-block:: bash
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$ make PLATFORM=k3-j721e CFG_ARM64_core=y
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3. U-Boot:
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* 4.1 R5:
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.. code-block:: bash
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$ make j721e_evm_r5_defconfig
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$ make CROSS_COMPILE=arm-linux-gnueabihf- \
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BINMAN_INDIRS=<path/to/ti-linux-firmware>
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* 4.2 A72:
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.. code-block:: bash
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$ make j721e_evm_a72_defconfig
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$ make CROSS_COMPILE=aarch64-linux-gnu- \
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BL31=<path/to/trusted-firmware-a/dir>/build/k3/generic/release/bl31.bin \
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TEE=<path/to/optee_os/dir>/out/arm-plat-k3/core/tee-raw.bin \
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BINMAN_INDIRS=<path/to/ti-linux-firmware>
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Target Images
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--------------
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In order to boot we need tiboot3.bin, sysfw.itb, tispl.bin and u-boot.img.
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Each SoC variant (GP, HS-FS and HS-SE) requires a different source for these
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files.
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- GP
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* tiboot3-j721e-gp-evm.bin, sysfw-j721e-gp-evm.itb from step 4.1
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* tispl.bin_unsigned, u-boot.img_unsigned from step 4.2
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- HS-FS
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* tiboot3-j721e_sr2-hs-fs-evm.bin, sysfw-j721e_sr2-hs-fs-evm.itb from step 4.1
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* tispl.bin, u-boot.img from step 4.2
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- HS-SE
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* tiboot3-j721e_sr2-hs-evm.bin, sysfw-j721e_sr2-hs-evm.itb from step 4.1
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* tispl.bin, u-boot.img from step 4.2
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Image formats:
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--------------
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- tiboot3.bin:
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.. code-block:: text
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+-----------------------+
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| X.509 |
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| Certificate |
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| +-------------------+ |
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| | R5 | |
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| | u-boot-spl.bin | |
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| +-------------------+ |
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| | FIT header | |
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| | +---------------+ | |
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| | | DTB 1...N | | |
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| | +---------------+ | |
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| +-------------------+ |
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+-----------------------+
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- tispl.bin
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.. code-block:: text
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+-----------------------+
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| FIT HEADER |
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| +-------------------+ |
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| | A72 TF-A | |
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| +-------------------+ |
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| | A72 OP-TEE | |
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| +-------------------+ |
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| | R5 DM FW | |
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| +-------------------+ |
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| | A72 SPL | |
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| +-------------------+ |
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| | SPL DTB 1...N | |
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| +-------------------+ |
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+-----------------------+
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- sysfw.itb
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.. code-block:: text
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+-----------------------+
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| FIT HEADER |
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| +-------------------+ |
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| | sysfw.bin | |
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| +-------------------+ |
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| | board config | |
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| +-------------------+ |
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| | PM config | |
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| +-------------------+ |
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| | RM config | |
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| +-------------------+ |
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| | Secure config | |
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| +-------------------+ |
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+-----------------------+
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R5 Memory Map:
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--------------
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.. list-table::
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:widths: 16 16 16
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:header-rows: 1
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* - Region
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- Start Address
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- End Address
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* - SPL
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- 0x41c00000
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- 0x41c40000
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* - EMPTY
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- 0x41c40000
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- 0x41c81920
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* - STACK
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- 0x41c85920
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- 0x41c81920
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* - Global data
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- 0x41c859f0
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- 0x41c85920
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* - Heap
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- 0x41c859f0
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- 0x41cf59f0
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* - BSS
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- 0x41cf59f0
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- 0x41cff9f0
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* - MCU Scratchpad
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- 0x41cff9fc
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- 0x41cffbfc
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* - ROM DATA
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- 0x41cffbfc
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- 0x41cfffff
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OSPI:
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-----
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ROM supports booting from OSPI from offset 0x0.
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Flashing images to OSPI:
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Below commands can be used to download tiboot3.bin, tispl.bin, u-boot.img,
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and sysfw.itb over tftp and then flash those to OSPI at their respective
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addresses.
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.. code-block:: text
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=> sf probe
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=> tftp ${loadaddr} tiboot3.bin
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=> sf update $loadaddr 0x0 $filesize
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=> tftp ${loadaddr} tispl.bin
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=> sf update $loadaddr 0x80000 $filesize
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=> tftp ${loadaddr} u-boot.img
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=> sf update $loadaddr 0x280000 $filesize
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=> tftp ${loadaddr} sysfw.itb
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=> sf update $loadaddr 0x6C0000 $filesize
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Flash layout for OSPI:
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.. code-block:: text
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0x0 +----------------------------+
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| ospi.tiboot3(512K) |
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0x80000 +----------------------------+
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| ospi.tispl(2M) |
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0x280000 +----------------------------+
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| ospi.u-boot(4M) |
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0x680000 +----------------------------+
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| ospi.env(128K) |
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0x6A0000 +----------------------------+
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| ospi.env.backup (128K) |
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0x6C0000 +----------------------------+
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| ospi.sysfw(1M) |
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0x7C0000 +----------------------------+
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| padding (256k) |
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0x800000 +----------------------------+
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| ospi.rootfs(UBIFS) |
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+----------------------------+
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Firmwares:
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----------
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The J721e u-boot allows firmware to be loaded for the Cortex-R5 subsystem.
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The CPSW5G in J7200 and CPSW9G in J721E present in MAIN domain is configured
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and controlled by the ethernet firmware that executes in the MAIN Cortex R5.
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The default supported environment variables support loading these firmwares
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from only MMC. "dorprocboot" env variable has to be set for the U-BOOT to load
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and start the remote cores in the system.
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J721E common processor board can be attached to a Ethernet QSGMII card and the
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PHY in the card has to be reset before it can be used for data transfer.
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"do_main_cpsw0_qsgmii_phyinit" env variable has to be set for the U-BOOT to
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configure this PHY.
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