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7314ba2bf8
Make the conversion for all existing TI documentation from README to .rst Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
139 lines
4.3 KiB
ReStructuredText
139 lines
4.3 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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.. sectionauthor:: Neha Malcom Francis <n-francis@ti.com>
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DRA7xx Generation
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=================
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Secure Boot
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-----------
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.. include:: am335x_evm.rst
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:start-after: .. secure_boot_include_start_config_ti_secure_device
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:end-before: .. secure_boot_include_end_config_ti_secure_device
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.. include:: am335x_evm.rst
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:start-after: .. secure_boot_include_start_spl_boot
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:end-before: .. secure_boot_include_end_spl_boot
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<IMAGE_FLAG> is a value that specifies the type of the image to
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generate OR the action the image generation tool will take. Valid
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values are:
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.. list-table::
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:widths: 25 25
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:header-rows: 0
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* - X-LOADER
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- Generates an image for NOR or QSPI boot modes
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* - MLO
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- Generates an image for NOR or QSPI boot modes
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* - ULO
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- Generates an image for USB/UART peripheral boot modes
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<INPUT_FILE> is the full path and filename of the public world boot
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loaderbinary file (for this platform, this is always u-boot-spl.bin).
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<OUTPUT_FILE> is the full path and filename of the final secure image.
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The output binary images should be used in place of the standard
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non-secure binary images (see the platform-specific user's guides
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and releases notes for how the non-secure images are typically used)
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.. list-table::
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:widths: 25 25
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:header-rows: 0
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* - u-boot-spl_HS_SPI_X-LOADER
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- boot image for SD/MMC/eMMC. This image is
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copied to a file named MLO, which is the name that
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the device ROM bootloader requires for loading from
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the FAT partition of an SD card (same as on
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non-secure devices)
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* - u-boot-spl_HS_ULO
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- boot image for USB/UART peripheral boot modes
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* - u-boot-spl_HS_X-LOADER
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- boot image for all other flash memories
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including QSPI and NOR flash
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<SPL_LOAD_ADDR> is the address at which SOC ROM should load the
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<INPUT_FILE>
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.. include:: am335x_evm.rst
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:start-after: .. secure_boot_include_start_primary_u_boot
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:end-before: .. secure_boot_include_end_primary_u_boot
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eMMC Boot Partition Use
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-----------------------
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It is possible, depending on SYSBOOT configuration to boot from the eMMC
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boot partitions using (name depending on documentation referenced)
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Alternative Boot operation mode or Boot Sequence Option 1/2. In this
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example we load MLO and u-boot.img from the build into DDR and then use
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'mmc bootbus' to set the required rate (see TRM) and 'mmc partconfig' to
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set boot0 as the boot device.
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.. prompt:: bash
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:prompts: =>
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setenv autoload no
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usb start
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dhcp
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mmc dev 1 1
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tftp ${loadaddr} dra7xx/MLO
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mmc write ${loadaddr} 0 100
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tftp ${loadaddr} dra7xx/u-boot.img
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mmc write ${loadaddr} 300 400
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mmc bootbus 1 2 0 2
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mmc partconf 1 1 1 0
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mmc rst-function 1 1
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.. include:: am43xx_evm.rst
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:start-after: qspi_boot_support_include_start
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:end-before: qspi_boot_support_include_end
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Testing
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^^^^^^^
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Build the patched U-Boot and load MLO/u-boot.img.
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Boot from another medium like MMC
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.. prompt:: bash
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=> mmc dev 0
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mmc0 is current device
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=> fatload mmc 0 0x82000000 MLO
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reading MLO
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55872 bytes read in 8 ms (6.7 MiB/s)
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=> fatload mmc 0 0x83000000 u-boot.img
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reading u-boot.img
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248600 bytes read in 19 ms (12.5 MiB/s)
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Commands to erase/write u-boot/MLO to flash device
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.. prompt:: bash
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=> sf probe 0
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SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, total 32 MiB, mapped at 5c000000
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=> sf erase 0 0x10000
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SF: 65536 bytes @ 0x0 Erased: OK
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=> sf erase 0x20000 0x10000
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SF: 65536 bytes @ 0x20000 Erased: OK
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=> sf erase 0x30000 0x10000
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SF: 65536 bytes @ 0x30000 Erased: OK
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=> sf erase 0x40000 0x10000
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SF: 65536 bytes @ 0x40000 Erased: OK
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=> sf erase 0x50000 0x10000
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SF: 65536 bytes @ 0x50000 Erased: OK
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=> sf erase 0x60000 0x10000
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SF: 65536 bytes @ 0x60000 Erased: OK
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=> sf write 82000000 0 0x10000
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SF: 65536 bytes @ 0x0 Written: OK
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=> sf write 83000000 0x20000 0x60000
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SF: 393216 bytes @ 0x20000 Written: OK
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Next, set sysboot to QSPI-1 boot mode(SYSBOOT[5:0] = 100110) and power
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on. ROM should find the GP header at offset 0 and load/execute SPL. SPL
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then detects that ROM was in QSPI-1 mode (boot code 10) and attempts to
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find a U-Boot image header at offset 0x20000 (set in the config file)
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and proceeds to load that image using the U-Boot image payload offset/size
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from the header. It will then start U-Boot.
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