mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-15 07:43:07 +00:00
a3bbd0b912
The U-Boot source moves to https://source.denx.de/u-boot/u-boot.git effective 2021-02-28. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
177 lines
6.4 KiB
ReStructuredText
177 lines
6.4 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+
|
|
.. sectionauthor:: Aiden Park <aiden.park@intel.com>
|
|
|
|
Slim Bootloader
|
|
===============
|
|
|
|
Introduction
|
|
------------
|
|
|
|
This target is to enable U-Boot_ as a payload of `Slim Bootloader`_ (a.k.a SBL)
|
|
boot firmware which currently supports QEMU, Apollolake, Whiskeylake,
|
|
Coffeelake-R platforms.
|
|
|
|
The `Slim Bootloader`_ is designed with multi-stages (Stage1A/B, Stage2, Payload)
|
|
architecture to cover from reset vector to OS booting and it consumes
|
|
`Intel FSP`_ for silicon initialization.
|
|
|
|
* Stage1A: Reset vector, CAR init with FSP-T
|
|
* Stage1B: Memory init with FSP-M, CAR teardown, Continue execution in memory
|
|
* Stage2 : Rest of Silicon init with FSP-S, Create HOB, Hand-off to Payload
|
|
* Payload: Payload init with HOB, Load OS from media, Booting OS
|
|
|
|
The Slim Bootloader stages (Stage1A/B, Stage2) focus on chipset, hardware and
|
|
platform specific initialization, and it provides useful information to a
|
|
payload in a HOB (Hand-Off Block) which has serial port, memory map, performance
|
|
data info and so on. This is Slim Bootloader architectural design to make a
|
|
payload light-weight, platform independent and more generic across different
|
|
boot solutions or payloads, and to minimize hardware re-initialization in a
|
|
payload.
|
|
|
|
Build Instruction for U-Boot as a Slim Bootloader payload
|
|
---------------------------------------------------------
|
|
|
|
Build U-Boot and obtain u-boot-dtb.bin::
|
|
|
|
$ make distclean
|
|
$ make slimbootloader_defconfig
|
|
$ make all
|
|
|
|
Prepare Slim Bootloader
|
|
-----------------------
|
|
|
|
1. Setup Build Environment for Slim Bootloader.
|
|
|
|
Refer to `Getting Started`_ page in `Slim Bootloader`_ document site.
|
|
|
|
2. Get source code. Let's simply clone the repo::
|
|
|
|
$ git clone https://github.com/slimbootloader/slimbootloader.git
|
|
|
|
3. Copy u-boot-dtb.bin to Slim Bootloader.
|
|
Slim Bootloader looks for a payload from the specific location.
|
|
Copy the build u-boot-dtb.bin to the expected location::
|
|
|
|
$ mkdir -p <Slim Bootloader Dir>/PayloadPkg/PayloadBins/
|
|
$ cp <U-Boot Dir>/u-boot-dtb.bin <Slim Bootloader Dir>/PayloadPkg/PayloadBins/u-boot-dtb.bin
|
|
|
|
Build Instruction for Slim Bootloader for QEMU target
|
|
-----------------------------------------------------
|
|
|
|
Slim Bootloader supports multiple payloads, and a board of Slim Bootloader
|
|
detects its target payload by PayloadId in board configuration.
|
|
The PayloadId can be any 4 Bytes value.
|
|
|
|
1. Update PayloadId. Let's use 'U-BT' as an example::
|
|
|
|
$ vi Platform/QemuBoardPkg/CfgData/CfgDataExt_Brd1.dlt
|
|
-GEN_CFG_DATA.PayloadId | 'AUTO'
|
|
+GEN_CFG_DATA.PayloadId | 'U-BT'
|
|
|
|
2. Update payload text base. PAYLOAD_EXE_BASE must be the same as U-Boot
|
|
CONFIG_SYS_TEXT_BASE in board/intel/slimbootloader/Kconfig.
|
|
PAYLOAD_LOAD_HIGH must be 0::
|
|
|
|
$ vi Platform/QemuBoardPkg/BoardConfig.py
|
|
+ self.PAYLOAD_LOAD_HIGH = 0
|
|
+ self.PAYLOAD_EXE_BASE = 0x00100000
|
|
|
|
3. Build QEMU target. Make sure u-boot-dtb.bin and U-BT PayloadId
|
|
in build command. The output is Outputs/qemu/SlimBootloader.bin::
|
|
|
|
$ python BuildLoader.py build qemu -p "OsLoader.efi:LLDR:Lz4;u-boot-dtb.bin:U-BT:Lzma"
|
|
|
|
4. Launch Slim Bootloader on QEMU.
|
|
You should reach at U-Boot serial console::
|
|
|
|
$ qemu-system-x86_64 -machine q35 -nographic -serial mon:stdio -pflash Outputs/qemu/SlimBootloader.bin
|
|
|
|
Test Linux booting on QEMU target
|
|
---------------------------------
|
|
|
|
Let's use LeafHill (APL) Yocto image for testing.
|
|
Download it from http://downloads.yoctoproject.org/releases/yocto/yocto-2.0/machines/leafhill/.
|
|
|
|
1. Prepare Yocto hard disk image::
|
|
|
|
$ wget http://downloads.yoctoproject.org/releases/yocto/yocto-2.0/machines/leafhill/leafhill-4.0-jethro-2.0.tar.bz2
|
|
$ tar -xvf leafhill-4.0-jethro-2.0.tar.bz2
|
|
$ ls -l leafhill-4.0-jethro-2.0/binary/core-image-sato-intel-corei7-64.hddimg
|
|
|
|
2. Launch Slim Bootloader on QEMU with disk image::
|
|
|
|
$ qemu-system-x86_64 -machine q35 -nographic -serial mon:stdio -pflash Outputs/qemu/SlimBootloader.bin -drive id=mydrive,if=none,file=/path/to/core-image-sato-intel-corei7-64.hddimg,format=raw -device ide-hd,drive=mydrive
|
|
|
|
3. Update boot environment values on shell::
|
|
|
|
=> setenv bootfile vmlinuz
|
|
=> setenv bootdev scsi
|
|
=> boot
|
|
|
|
Build Instruction for Slim Bootloader for LeafHill (APL) target
|
|
---------------------------------------------------------------
|
|
|
|
Prepare U-Boot and Slim Bootloader as described at the beginning of this page.
|
|
Also, the PayloadId needs to be set for APL board.
|
|
|
|
1. Update PayloadId. Let's use 'U-BT' as an example::
|
|
|
|
$ vi Platform/ApollolakeBoardPkg/CfgData/CfgData_Int_LeafHill.dlt
|
|
-GEN_CFG_DATA.PayloadId | 'AUTO
|
|
+GEN_CFG_DATA.PayloadId | 'U-BT'
|
|
|
|
2. Update payload text base.
|
|
|
|
* PAYLOAD_EXE_BASE must be the same as U-Boot CONFIG_SYS_TEXT_BASE
|
|
in board/intel/slimbootloader/Kconfig.
|
|
* PAYLOAD_LOAD_HIGH must be 0::
|
|
|
|
$ vi Platform/ApollolakeBoardPkg/BoardConfig.py
|
|
+ self.PAYLOAD_LOAD_HIGH = 0
|
|
+ self.PAYLOAD_EXE_BASE = 0x00100000
|
|
|
|
3. Build APL target. Make sure u-boot-dtb.bin and U-BT PayloadId
|
|
in build command. The output is Outputs/apl/Stitch_Components.zip::
|
|
|
|
$ python BuildLoader.py build apl -p "OsLoader.efi:LLDR:Lz4;u-boot-dtb.bin:U-BT:Lzma"
|
|
|
|
4. Stitch IFWI.
|
|
|
|
Refer to Apollolake_ page in Slim Bootloader document site::
|
|
|
|
$ python Platform/ApollolakeBoardPkg/Script/StitchLoader.py -i <Existing IFWI> -s Outputs/apl/Stitch_Components.zip -o <Output IFWI>
|
|
|
|
5. Flash IFWI.
|
|
|
|
Use DediProg to flash IFWI. You should reach at U-Boot serial console.
|
|
|
|
|
|
Build Instruction to use ELF U-Boot
|
|
-----------------------------------
|
|
|
|
1. Enable CONFIG_OF_EMBED::
|
|
|
|
$ vi configs/slimbootloader_defconfig
|
|
+CONFIG_OF_EMBED=y
|
|
|
|
2. Build U-Boot::
|
|
|
|
$ make distclean
|
|
$ make slimbootloader_defconfig
|
|
$ make all
|
|
$ strip u-boot (removing symbol for reduced size)
|
|
|
|
3. Do same steps as above
|
|
|
|
* Copy u-boot (ELF) to PayloadBins directory
|
|
* Update PayloadId 'U-BT' as above.
|
|
* No need to set PAYLOAD_LOAD_HIGH and PAYLOAD_EXE_BASE.
|
|
* Build Slim Bootloader. Use u-boot instead of u-boot-dtb.bin::
|
|
|
|
$ python BuildLoader.py build <qemu or apl> -p "OsLoader.efi:LLDR:Lz4;u-boot:U-BT:Lzma"
|
|
|
|
.. _U-Boot: https://source.denx.de/
|
|
.. _`Slim Bootloader`: https://github.com/slimbootloader/
|
|
.. _`Intel FSP`: https://github.com/IntelFsp/
|
|
.. _`Getting Started`: https://slimbootloader.github.io/getting-started/
|
|
.. _Apollolake: https://slimbootloader.github.io/supported-hardware/apollo-lake-crb.html#stitching
|