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https://github.com/ARM-software/arm-trusted-firmware.git
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0396bcbc6a
Fix all external broken links reported by Sphinx linkcheck tool. This does not take care of broken cross-references between internal TF-A documentation files. These will be fixed in a future patch. Change-Id: I2a740a3ec0b688c14aad575a6c2ac71e72ce051e Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
46 lines
1.5 KiB
ReStructuredText
46 lines
1.5 KiB
ReStructuredText
Allwinner ARMv8 SoCs
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====================
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Trusted Firmware-A (TF-A) implements the EL3 firmware layer for Allwinner
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SoCs with ARMv8 cores. Only BL31 is used to provide proper EL3 setup and
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PSCI runtime services.
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U-Boot's SPL acts as a loader, loading both BL31 and BL33 (typically U-Boot).
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Loading is done from SD card, eMMC or SPI flash, also via an USB debug
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interface (FEL).
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BL31 lives in SRAM A2, which is documented to be accessible from secure
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world only.
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Current limitations:
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- Missing PMIC support
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After building bl31.bin, the binary must be fed to the U-Boot build system
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to include it in the FIT image that the SPL loader will process.
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bl31.bin can be either copied (or sym-linked) into U-Boot's root directory,
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or the environment variable BL31 must contain the binary's path.
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See the respective `U-Boot documentation`_ for more details.
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To build for machines with an A64 or H5 SoC:
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.. code:: shell
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make CROSS_COMPILE=aarch64-linux-gnu- PLAT=sun50i_a64 DEBUG=1 bl31
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To build for machines with an H6 SoC:
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.. code:: shell
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make CROSS_COMPILE=aarch64-linux-gnu- PLAT=sun50i_h6 DEBUG=1 bl31
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.. _U-Boot documentation: https://gitlab.denx.de/u-boot/u-boot/-/blob/master/board/sunxi/README.sunxi64
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Trusted OS dispatcher
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---------------------
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One can boot Trusted OS(OP-TEE OS, bl32 image) along side bl31 image on Allwinner A64.
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In order to include the 'opteed' dispatcher in the image, pass 'SPD=opteed' on the command line
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while compiling the bl31 image and make sure the loader (SPL) loads the Trusted OS binary to
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the beginning of DRAM (0x40000000).
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