Heinrich Schuchardt heinrich.schuchardt@canonical.com 于2024年6月8日周六 00:31写道：
On 23.05.24 08:40, Kongyang Liu wrote:
Add detailed steps for compiling U-Boot and OpenSBI, generating the firmware package with fiptool, and booting the board.
Signed-off-by: Kongyang Liu seashell11234455@gmail.com
doc/board/sophgo/milkv_duo.rst | 41 +++++++++++++++++++++++++--------- 1 file changed, 30 insertions(+), 11 deletions(-)
diff --git a/doc/board/sophgo/milkv_duo.rst b/doc/board/sophgo/milkv_duo.rst index cb2ed1ad98..a88db5b903 100644 --- a/doc/board/sophgo/milkv_duo.rst +++ b/doc/board/sophgo/milkv_duo.rst @@ -20,31 +20,50 @@ Building .. code-block:: console
There are is a 64 MiB version of the Milk-V Duo with the CF1800B, a 256 MiB version with the SG2002 and a Milk-V Duo S with the SG2000.
This may confuse U-Boot users. Should we mention explicitly that only the CF1800B based board is supported?
I have tested the Milk-V Duo based on CV1800B and the Milk-V Duo256M based on SG2002. The tool works properly on both of these boards. However, I have not tested the Duo S because I currently don't have the board.
At present, U-Boot mainly supports the Milk-V Duo with 64M memory. For users with 256M, we have provided a README in the GitHub repository for building fip.bin.
export CROSS_COMPILE=<riscv64 toolchain prefix>
+3. Compile U-Boot
+.. code-block:: console
- cd <U-Boot-dir> make milkv_duo_defconfig make
-This will generate u-boot-dtb.bin +This will generate u-boot.bin and u-boot.dtb
-Booting -~~~~~~~ -Currently, we rely on vendor FSBL(First Stage Boot Loader) to initialize the -clock and load the u-boot image, then bootup from it. +4. Compile OpenSBI
+.. code-block:: console
-Alternatively, to run u-boot-dtb.bin on top of FSBL, follow these steps:
- cd <OpenSBI-dir>
- make PLATFORM=generic FW_FDT_PATH=<Your U-Boot Path>/u-boot.dtb
-1. Use the vendor-provided tool to create a unified fip.bin file containing
- FSBL, OpenSBI, and U-Boot.
+This will generate fw_dynamic.bin
-2. Place the generated fip.bin file into the FAT partition of the SD card. +4. Generate firmware image package
-3. Insert the SD card into the board and power it on. +Fiptool(https://github.com/sophgo/fiptool) is used to generate fip file.
+.. code-block:: console
- git clone https://github.com/sophgo/fiptool
- cd fiptool
- ./fiptool \
--fsbl data/fsbl/cv180x.bin \Where do we get this file from?
This is the precompiled FSBL provided by the vendor. Currently, the FSBL needs to be placed into the vendor-provided SDK to be compiled. For convenience, we provide the FSBL for different SoCs and uploaded them to the GitHub repository.
--opensbi <OpenSBI-dir>/fw_dynamic.bin \--uboot <U-Boot-dir>/u-boot.bin \+This will generate fip.bin
Should we let binman do this in future?
The format of the FIP file is defined by the FSBL. This format may change as the vendor updates the FSBL. At present, I don't think it's necessary to adapt binman to this format. If there is a need in the future, we will address this task.
+Booting +~~~~~~~ +1. Place the generated fip.bin file into the FAT partition of the SD card.
This information is insufficient to set up a new SD-card.
Should the SD card be MBR or GPT partitioned?
On an SD card there are typically are multiple partitions. All of these may be FAT partioned. Does the boot ROM use a fixed partition number, a partition type, or a start sector to identify the relevant partition?
It is left unclear if fip.bin is to be copied by dd to the partition or into a FAT file system on the partition.
I just downloaded the vendor milkv-duo-v1.1.1-2024-0528.img.zip file.
Here I found an MBR partition table with the following partitions:
Device Boot Start End Sectors Size Id Type milkv-duo-v1.1.1-2024-0528.img1 * 1 262144 262144 128M c W95 FAT32 (LBA) milkv-duo-v1.1.1-2024-0528.img2 262145 1835008 1572864 768M 83 Linux milkv-duo-v1.1.1-2024-0528.img3 1835009 2359296 524288 256M 0 Empty
Partition 1 was FAT16 partitioned and contained file fip.bin in the root directory. But I still don't know how the relevant partition is identified.
Since I used a SD card that has been already formatted during my testing, I forgot to mention this step in the documentation. I will add instructions for this step in the next patch.
Best regards Kongyang Liu
Best regards
Heinrich
+2. Insert the SD card into the board and power it on.
The board will automatically execute the FSBL from the fip.bin file. Subsequently, it will transition to OpenSBI, and finally, OpenSBI will invoke U-Boot.
- Sample boot log from Milk-V Duo board
.. code-block:: none