.. SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause .. sectionauthor:: Neha Malcom Francis DRA7xx Generation ================= Secure Boot ----------- .. include:: am335x_evm.rst :start-after: .. secure_boot_include_start_config_ti_secure_device :end-before: .. secure_boot_include_end_config_ti_secure_device .. include:: am335x_evm.rst :start-after: .. secure_boot_include_start_spl_boot :end-before: .. secure_boot_include_end_spl_boot is a value that specifies the type of the image to generate OR the action the image generation tool will take. Valid values are: .. list-table:: :widths: 25 25 :header-rows: 0 * - X-LOADER - Generates an image for NOR or QSPI boot modes * - MLO - Generates an image for NOR or QSPI boot modes * - ULO - Generates an image for USB/UART peripheral boot modes is the full path and filename of the public world boot loaderbinary file (for this platform, this is always u-boot-spl.bin). is the full path and filename of the final secure image. The output binary images should be used in place of the standard non-secure binary images (see the platform-specific user's guides and releases notes for how the non-secure images are typically used) .. list-table:: :widths: 25 25 :header-rows: 0 * - u-boot-spl_HS_SPI_X-LOADER - boot image for SD/MMC/eMMC. This image is copied to a file named MLO, which is the name that the device ROM bootloader requires for loading from the FAT partition of an SD card (same as on non-secure devices) * - u-boot-spl_HS_ULO - boot image for USB/UART peripheral boot modes * - u-boot-spl_HS_X-LOADER - boot image for all other flash memories including QSPI and NOR flash is the address at which SOC ROM should load the .. include:: am335x_evm.rst :start-after: .. secure_boot_include_start_primary_u_boot :end-before: .. secure_boot_include_end_primary_u_boot eMMC Boot Partition Use ----------------------- It is possible, depending on SYSBOOT configuration to boot from the eMMC boot partitions using (name depending on documentation referenced) Alternative Boot operation mode or Boot Sequence Option 1/2. In this example we load MLO and u-boot.img from the build into DDR and then use 'mmc bootbus' to set the required rate (see TRM) and 'mmc partconfig' to set boot0 as the boot device. .. prompt:: bash :prompts: => setenv autoload no usb start dhcp mmc dev 1 1 tftp ${loadaddr} dra7xx/MLO mmc write ${loadaddr} 0 100 tftp ${loadaddr} dra7xx/u-boot.img mmc write ${loadaddr} 300 400 mmc bootbus 1 2 0 2 mmc partconf 1 1 1 0 mmc rst-function 1 1 .. include:: am43xx_evm.rst :start-after: qspi_boot_support_include_start :end-before: qspi_boot_support_include_end Testing ^^^^^^^ Build the patched U-Boot and load MLO/u-boot.img. Boot from another medium like MMC .. prompt:: bash => mmc dev 0 mmc0 is current device => fatload mmc 0 0x82000000 MLO reading MLO 55872 bytes read in 8 ms (6.7 MiB/s) => fatload mmc 0 0x83000000 u-boot.img reading u-boot.img 248600 bytes read in 19 ms (12.5 MiB/s) Commands to erase/write u-boot/MLO to flash device .. prompt:: bash => sf probe 0 SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, total 32 MiB, mapped at 5c000000 => sf erase 0 0x10000 SF: 65536 bytes @ 0x0 Erased: OK => sf erase 0x20000 0x10000 SF: 65536 bytes @ 0x20000 Erased: OK => sf erase 0x30000 0x10000 SF: 65536 bytes @ 0x30000 Erased: OK => sf erase 0x40000 0x10000 SF: 65536 bytes @ 0x40000 Erased: OK => sf erase 0x50000 0x10000 SF: 65536 bytes @ 0x50000 Erased: OK => sf erase 0x60000 0x10000 SF: 65536 bytes @ 0x60000 Erased: OK => sf write 82000000 0 0x10000 SF: 65536 bytes @ 0x0 Written: OK => sf write 83000000 0x20000 0x60000 SF: 393216 bytes @ 0x20000 Written: OK Next, set sysboot to QSPI-1 boot mode(SYSBOOT[5:0] = 100110) and power on. ROM should find the GP header at offset 0 and load/execute SPL. SPL then detects that ROM was in QSPI-1 mode (boot code 10) and attempts to find a U-Boot image header at offset 0x20000 (set in the config file) and proceeds to load that image using the U-Boot image payload offset/size from the header. It will then start U-Boot.