mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-15 01:17:39 +00:00
4c60512ad9
It add documentation on licencing & provides links to the amlogic-boot-fip pre-built files collections. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
93 lines
4.1 KiB
ReStructuredText
93 lines
4.1 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+
|
|
|
|
Pre-Generated FIP file set
|
|
==========================
|
|
|
|
The Amlogic ARMv8 based SoCs uses a vendor variant of the Trusted Firmware-A
|
|
boot architecture.
|
|
|
|
You can find documentation on the Trusted Firmware-A architecture on: https://www.trustedfirmware.org/projects/tf-a/
|
|
|
|
The Trusted Firmware-A uses the following boot elements (simplified):
|
|
|
|
- BL1: First boot step, implemented in ROM on Amlogic SoCs
|
|
- BL2: Second boot step, used to initialize the SoC main clocks & DDR interface. The BL21 and ACS board-specific binaries are "inserted" in the BL32 binary before signing/packaging in order to be flashed on the platform.
|
|
- BL30: Amlogic Secure Co-Processor (SCP) firmware used to handle all the system management operations (DVFS, suspend/resume, ...)
|
|
- BL301: Amlogic Secure Co-Processor (SCP) board-specific firmware "plug-in" to handle custom DVFS & suspend-resume parameters
|
|
- BL31: Initializes the interrupt controller and the system management interface (PSCI)
|
|
- BL32 (Optional): Is the Trusted Environment Execution (TEE) Operating System to run secure Trusted Apps, e.g. OP-TEE
|
|
- BL33: Is the last non-secure step, usually U-Boot which loads Linux
|
|
|
|
Amlogic provides in binary form:
|
|
|
|
- bl2.bin
|
|
- bl30.bin
|
|
- bl30.bin
|
|
- bl31.img
|
|
- bl32.bin
|
|
|
|
And for lastest SoCs, Amlogic also provides the DDR drivers used by the BL2 binary.
|
|
|
|
The licence of these files wasn't clear until recently, the currently Amlogic distribution licence
|
|
is the following:
|
|
|
|
.. code-block:: C
|
|
|
|
// Copyright (C) 2018 Amlogic, Inc. All rights reserved.
|
|
//
|
|
// All information contained herein is Amlogic confidential.
|
|
//
|
|
// This software is provided to you pursuant to Software License
|
|
// Agreement (SLA) with Amlogic Inc ("Amlogic"). This software may be
|
|
// used only in accordance with the terms of this agreement.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification is strictly prohibited without prior written permission
|
|
// from Amlogic.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
The following files are generated from the Amlogic U-Boot fork:
|
|
|
|
- acs.bin: contains the PLL & DDR parameters for the board
|
|
- bl301.bin: contains the DVFS & suspend-resume handling code for the board
|
|
- bl33.bin: U-boot binary image
|
|
|
|
The acs.bin & bl301.bin uses the U-Boot GPL-2.0+ headers & build systems, thus those
|
|
are considered issued from GPL-2.0+ source code.
|
|
|
|
The tools used to sign & package those binary files are delivered in binary format
|
|
for Intel x86-64 and Python 2.x only.
|
|
|
|
A collection of pre-built with the corresponding Amlogic binaries for the common
|
|
commercially available boards were collected in the https://github.com/LibreELEC/amlogic-boot-fip
|
|
repository.
|
|
|
|
Using this collection for a commercially available board is very easy.
|
|
|
|
Here considering the Libre Computer AML-S905X-CC, which codename is `lepotato`:
|
|
|
|
.. code-block:: bash
|
|
|
|
$ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
|
|
$ cd amlogic-boot-fip
|
|
$ mkdir my-output-dir
|
|
$ ./build-fip.sh lepotato /path/to/u-boot/u-boot.bin my-output-dir
|
|
|
|
and then write the image to SD with:
|
|
|
|
.. code-block:: bash
|
|
|
|
$ DEV=/dev/your_sd_device
|
|
$ dd if=my-output-dir/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
|
|
$ dd if=my-output-dir/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=444
|