1 .. SPDX-License-Identifier: GPL-2.0+
2 .. sectionauthor:: Aiden Park <aiden.park@intel.com>
10 This target is to enable U-Boot_ as a payload of `Slim Bootloader`_ (a.k.a SBL)
11 boot firmware which currently supports QEMU, Apollolake, Whiskeylake,
12 Coffeelake-R platforms.
14 The `Slim Bootloader`_ is designed with multi-stages (Stage1A/B, Stage2, Payload)
15 architecture to cover from reset vector to OS booting and it consumes
16 `Intel FSP`_ for silicon initialization.
18 * Stage1A: Reset vector, CAR init with FSP-T
19 * Stage1B: Memory init with FSP-M, CAR teardown, Continue execution in memory
20 * Stage2 : Rest of Silicon init with FSP-S, Create HOB, Hand-off to Payload
21 * Payload: Payload init with HOB, Load OS from media, Booting OS
23 The Slim Bootloader stages (Stage1A/B, Stage2) focus on chipset, hardware and
24 platform specific initialization, and it provides useful information to a
25 payload in a HOB (Hand-Off Block) which has serial port, memory map, performance
26 data info and so on. This is Slim Bootloader architectural design to make a
27 payload light-weight, platform independent and more generic across different
28 boot solutions or payloads, and to minimize hardware re-initialization in a
31 Build Instruction for U-Boot as a Slim Bootloader payload
32 ---------------------------------------------------------
34 Build U-Boot and obtain u-boot-dtb.bin::
37 $ make slimbootloader_defconfig
40 Prepare Slim Bootloader
41 -----------------------
43 1. Setup Build Environment for Slim Bootloader.
45 Refer to `Getting Started`_ page in `Slim Bootloader`_ document site.
47 2. Get source code. Let's simply clone the repo::
49 $ git clone https://github.com/slimbootloader/slimbootloader.git
51 3. Copy u-boot-dtb.bin to Slim Bootloader.
52 Slim Bootloader looks for a payload from the specific location.
53 Copy the build u-boot-dtb.bin to the expected location::
55 $ mkdir -p <Slim Bootloader Dir>/PayloadPkg/PayloadBins/
56 $ cp <U-Boot Dir>/u-boot-dtb.bin <Slim Bootloader Dir>/PayloadPkg/PayloadBins/u-boot-dtb.bin
58 Build Instruction for Slim Bootloader for QEMU target
59 -----------------------------------------------------
61 Slim Bootloader supports multiple payloads, and a board of Slim Bootloader
62 detects its target payload by PayloadId in board configuration.
63 The PayloadId can be any 4 Bytes value.
65 1. Update PayloadId. Let's use 'U-BT' as an example::
67 $ vi Platform/QemuBoardPkg/CfgData/CfgDataExt_Brd1.dlt
68 -GEN_CFG_DATA.PayloadId | 'AUTO'
69 +GEN_CFG_DATA.PayloadId | 'U-BT'
71 2. Update payload text base. PAYLOAD_EXE_BASE must be the same as U-Boot
72 CONFIG_SYS_TEXT_BASE in board/intel/slimbootloader/Kconfig.
73 PAYLOAD_LOAD_HIGH must be 0::
75 $ vi Platform/QemuBoardPkg/BoardConfig.py
76 + self.PAYLOAD_LOAD_HIGH = 0
77 + self.PAYLOAD_EXE_BASE = 0x00100000
79 3. Build QEMU target. Make sure u-boot-dtb.bin and U-BT PayloadId
80 in build command. The output is Outputs/qemu/SlimBootloader.bin::
82 $ python BuildLoader.py build qemu -p "OsLoader.efi:LLDR:Lz4;u-boot-dtb.bin:U-BT:Lzma"
84 4. Launch Slim Bootloader on QEMU.
85 You should reach at U-Boot serial console::
87 $ qemu-system-x86_64 -machine q35 -nographic -serial mon:stdio -pflash Outputs/qemu/SlimBootloader.bin
89 Test Linux booting on QEMU target
90 ---------------------------------
92 Let's use LeafHill (APL) Yocto image for testing.
93 Download it from http://downloads.yoctoproject.org/releases/yocto/yocto-2.0/machines/leafhill/.
95 1. Prepare Yocto hard disk image::
97 $ wget http://downloads.yoctoproject.org/releases/yocto/yocto-2.0/machines/leafhill/leafhill-4.0-jethro-2.0.tar.bz2
98 $ tar -xvf leafhill-4.0-jethro-2.0.tar.bz2
99 $ ls -l leafhill-4.0-jethro-2.0/binary/core-image-sato-intel-corei7-64.hddimg
101 2. Launch Slim Bootloader on QEMU with disk image::
103 $ 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
105 3. Update boot environment values on shell::
107 => setenv bootfile vmlinuz
108 => setenv bootdev scsi
111 Build Instruction for Slim Bootloader for LeafHill (APL) target
112 ---------------------------------------------------------------
114 LeafHill is using PCI UART2 device as a serial port.
115 For MEM32 serial port, CONFIG_SYS_NS16550_MEM32 needs to be enabled in U-Boot.
117 1. Enable CONFIG_SYS_NS16550_MEM32 in U-Boot::
119 $ vi include/configs/slimbootloader.h
120 +#define CONFIG_SYS_NS16550_MEM32
121 #ifdef CONFIG_SYS_NS16550_MEM3
126 $ make slimbootloader_defconfig
129 3. Copy u-boot-dtb.bin to Slim Bootloader.
130 Slim Bootloader looks for a payload from the specific location.
131 Copy the build u-boot-dtb.bin to the expected location::
133 $ mkdir -p <Slim Bootloader Dir>/PayloadPkg/PayloadBins/
134 $ cp <U-Boot Dir>/u-boot-dtb.bin <Slim Bootloader Dir>/PayloadPkg/PayloadBins/u-boot-dtb.bin
136 4. Update PayloadId. Let's use 'U-BT' as an example::
138 $ vi Platform/ApollolakeBoardPkg/CfgData/CfgData_Int_LeafHill.dlt
139 -GEN_CFG_DATA.PayloadId | 'AUTO
140 +GEN_CFG_DATA.PayloadId | 'U-BT'
142 5. Update payload text base.
144 * PAYLOAD_EXE_BASE must be the same as U-Boot CONFIG_SYS_TEXT_BASE
145 in board/intel/slimbootloader/Kconfig.
146 * PAYLOAD_LOAD_HIGH must be 0::
148 $ vi Platform/ApollolakeBoardPkg/BoardConfig.py
149 + self.PAYLOAD_LOAD_HIGH = 0
150 + self.PAYLOAD_EXE_BASE = 0x00100000
152 6. Build APL target. Make sure u-boot-dtb.bin and U-BT PayloadId
153 in build command. The output is Outputs/apl/Stitch_Components.zip::
155 $ python BuildLoader.py build apl -p "OsLoader.efi:LLDR:Lz4;u-boot-dtb.bin:U-BT:Lzma"
159 Refer to Apollolake_ page in Slim Bootloader document site::
161 $ python Platform/ApollolakeBoardPkg/Script/StitchLoader.py -i <Existing IFWI> -s Outputs/apl/Stitch_Components.zip -o <Output IFWI>
165 Use DediProg to flash IFWI. You should reach at U-Boot serial console.
168 Build Instruction to use ELF U-Boot
169 -----------------------------------
171 1. Enable CONFIG_OF_EMBED::
173 $ vi configs/slimbootloader_defconfig
179 $ make slimbootloader_defconfig
181 $ strip u-boot (removing symbol for reduced size)
183 3. Do same steps as above
185 * Copy u-boot (ELF) to PayloadBins directory
186 * Update PayloadId 'U-BT' as above.
187 * No need to set PAYLOAD_LOAD_HIGH and PAYLOAD_EXE_BASE.
188 * Build Slim Bootloader. Use u-boot instead of u-boot-dtb.bin::
190 $ python BuildLoader.py build <qemu or apl> -p "OsLoader.efi:LLDR:Lz4;u-boot:U-BT:Lzma"
192 .. _U-Boot: https://gitlab.denx.de/
193 .. _`Slim Bootloader`: https://github.com/slimbootloader/
194 .. _`Intel FSP`: https://github.com/IntelFsp/
195 .. _`Getting Started`: https://slimbootloader.github.io/getting-started/
196 .. _Apollolake: https://slimbootloader.github.io/supported-hardware/apollo-lake-crb.html#stitching