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Add documenatation and boot flow diagram for AM64 EVM/SoC. Suggested-by: Nishanth Menon <nm@ti.com> Signed-off-by: Roger Quadros <rogerq@kernel.org> Reviewed-by: Nishanth Menon <nm@ti.com> Tested-by: Nishanth Menon <nm@ti.com> #SK-AM64B
197 lines
4.8 KiB
ReStructuredText
197 lines
4.8 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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.. sectionauthor:: Nishanth Menon <nm@ti.com>
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AM64 Platforms
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==============
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Introduction:
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-------------
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The AM642 SoC belongs to the K3 Multicore SoC architecture platform,
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providing advanced system integration to enable applications such as
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Motor Drives, PLC, Remote IO and IoT Gateways.
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Some highlights of this SoC are:
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* Dual Cortex-A53s in a single cluster, two clusters of dual Cortex-R5F
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MCUs, and a single Cortex-M4F.
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* Two Gigabit Industrial Communication Subsystems (ICSSG).
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* Integrated Ethernet switch supporting up to a total of two external
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ports.
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* PCIe-GEN2x1L, USB3/USB2, 2xCAN-FD, eMMC and SD, UFS, OSPI memory
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controller, QSPI, I2C, eCAP/eQEP, ePWM, ADC, among other
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peripherals.
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* Centralized System Controller for Security, Power, and Resource
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Management (DMSC).
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More details can be found in the Technical Reference Manual:
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https://www.ti.com/lit/pdf/spruim2
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Platform information:
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* AM64-EVM: https://www.ti.com/tool/TMDS64EVM
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* AM64-SK: https://www.ti.com/tool/SK-AM64B
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Boot Flow:
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----------
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Below is the pictorial representation of boot flow:
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.. image:: img/boot_diagram_am64.svg
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- Here TIFS acts as master and provides all the critical services. R5/A53
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requests TIFS 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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0. Setup the environment variables:
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.. include:: k3.rst
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:start-after: .. k3_rst_include_start_common_env_vars_desc
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:end-before: .. k3_rst_include_end_common_env_vars_desc
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.. include:: k3.rst
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:start-after: .. k3_rst_include_start_board_env_vars_desc
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:end-before: .. k3_rst_include_end_board_env_vars_desc
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Set the variables corresponding to this platform:
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.. include:: k3.rst
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:start-after: .. k3_rst_include_start_common_env_vars_defn
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:end-before: .. k3_rst_include_end_common_env_vars_defn
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.. code-block:: bash
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$ export UBOOT_CFG_CORTEXR=am64x_evm_r5_defconfig
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$ export UBOOT_CFG_CORTEXA=am64x_evm_a53_defconfig
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$ export TFA_BOARD=lite
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$ # we dont use any extra TFA parameters
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$ unset TFA_EXTRA_ARGS
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$ export OPTEE_PLATFORM=k3-am64x
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$ # we dont use any extra TFA parameters
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$ unset OPTEE_EXTRA_ARGS
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.. am64x_evm_rst_include_start_build_steps
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1. Trusted Firmware-A:
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.. include:: k3.rst
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:start-after: .. k3_rst_include_start_build_steps_tfa
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:end-before: .. k3_rst_include_end_build_steps_tfa
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2. OP-TEE:
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.. include:: k3.rst
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:start-after: .. k3_rst_include_start_build_steps_optee
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:end-before: .. k3_rst_include_end_build_steps_optee
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3. U-Boot:
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* 4.1 R5:
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.. include:: k3.rst
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:start-after: .. k3_rst_include_start_build_steps_spl_r5
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:end-before: .. k3_rst_include_end_build_steps_spl_r5
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* 4.2 A53:
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.. include:: k3.rst
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:start-after: .. k3_rst_include_start_build_steps_uboot
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:end-before: .. k3_rst_include_end_build_steps_uboot
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.. am64x_evm_rst_include_end_build_steps
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Target Images
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--------------
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In order to boot we need tiboot3.bin, tispl.bin and u-boot.img. Each SoC
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variant (GP, HS-FS, HS-SE) requires a different source for these files.
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- GP
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* tiboot3-am64x-gp-evm.bin from step 3.1
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* tispl.bin_unsigned, u-boot.img_unsigned from step 3.2
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- HS-FS
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* tiboot3-am64x-hs-fs-evm.bin from step 3.1
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* tispl.bin, u-boot.img from step 3.2
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- HS-SE
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* tiboot3-am64x-hs-evm.bin from step 3.1
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* tispl.bin, u-boot.img from step 3.2
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Image formats:
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--------------
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- tiboot3.bin
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.. image:: img/multi_cert_tiboot3.bin.svg
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- tispl.bin
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.. image:: img/nodm_tispl.bin.svg
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Switch Setting for Boot Mode
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----------------------------
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Boot Mode pins provide means to select the boot mode and options before the
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device is powered up. After every POR, they are the main source to populate
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the Boot Parameter Tables.
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The following table shows some common boot modes used on AM64 platform. More
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details can be found in the Technical Reference Manual:
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https://www.ti.com/lit/pdf/spruim2 under the `Boot Mode Pins` section.
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.. list-table:: Boot Modes for AM64x-EVM
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:widths: 16 16 16
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:header-rows: 1
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* - Switch Label
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- SW2: 12345678
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- SW3: 12345678
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* - SD/MMC
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- 11000010
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- 01000000
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* - xSPI/SFDP (OSPI)
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- 11001110
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- 01000000
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* - UART
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- 11011100
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- 00000000
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.. note ::
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For SW2 and SW3, the switch state in the "ON" position = 1.
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.. list-table:: Boot Modes for AM64x-SK
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:widths: 16 16 16
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:header-rows: 1
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* - Switch Label
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- SW2: 12345678
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- SW3: 12345678
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* - SD/MMC
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- 00000010
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- 01000011
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* - xSPI/SFDP (OSPI)
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- 00000010
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- 01110011
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* - UART
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- 00000000
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- 00111011
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.. note ::
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For SW2 and SW3, the switch state in the "ON" position = 1.
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Boot bits on SK is reversed bits to the bootmode signals
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