how to build and create opensbi.bin and image files as in Pre-built Bitstreams and Linux/OpenSBI images

[zoro269]

#164 (comment)
I have followed the steps but still not working.
The purpose I want is to be able to build an openSBI image file like in the instructions above

[enjoy-digital]

Hi @zoro269,

here is some code I used recently and that will probably be integrated soon in the repository:

def opensbi_build():
    # Be sure third_party dir is present and switch to it.
    create_third_party_dir()
    os.chdir("third_party")

    # Get OpenSBI.
    if not os.path.exists("opensbi"):
        os.system("git clone https://github.com/litex-hub/opensbi --branch 0.8-linux-on-litex-vexriscv")
    os.chdir("opensbi")

    # Configure / Build OpenSBI.
    os.system("make CROSS_COMPILE=riscv64-unknown-elf- PLATFORM=litex/vexriscv")

    # Copy Linux Images.
    os.system("cp build/platform/litex/vexriscv/firmware/fw_payload.bin ../../images/opensbi.bin")

Please let me know if you still have troubles building with this.

[zoro269]

Hi enjoy-digital Can you guide me the running steps and order of running? I still don't quite understand. Many thanks Vào Th 3, 7 thg 6, 2022 vào lúc 14:05 enjoy-digital < ***@***.***> đã viết:

…

Hi @zoro269 <https://github.com/zoro269>, here is some code I used recently and that will probably be integrated soon in the repository: def opensbi_build(): # Be sure third_party dir is present and switch to it. create_third_party_dir() os.chdir("third_party") # Get OpenSBI. if not os.path.exists("opensbi"): os.system("git clone https://github.com/litex-hub/opensbi --branch 0.8-linux-on-litex-vexriscv") os.chdir("opensbi") # Configure / Build OpenSBI. os.system("make CROSS_COMPILE=riscv64-unknown-elf- PLATFORM=litex/vexriscv") # Copy Linux Images. os.system("cp build/platform/litex/vexriscv/firmware/fw_payload.bin ../../images/opensbi.bin") Please let me know if you still have troubles building with this. — Reply to this email directly, view it on GitHub <#282 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AZP7SWH5MXLTNUBUNLMAQG3VN3YD3ANCNFSM5X7VYLMA> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[enjoy-digital]

This should work:

git clone https://github.com/litex-hub/opensbi --branch 0.8-linux-on-litex-vexriscv
cd opensbi
make CROSS_COMPILE=riscv64-unknown-elf- PLATFORM=litex/vexriscv

The binary is then located at build/platform/litex/vexriscv/firmware/fw_payload.bin.

[zoro269]

I followed the instructions and got some errors as follows:

• first: at make CROSS_COMPILE=riscv64-unknown-elf- PLATFORM=litex/vexriscv . I got the following error:

ELF platform/litex/vexriscv/firmware/fw_dynamic.elf
/home/namnguyendc4/Testtt/linux-on-litex-vexriscv/opensbi/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14/bin/../lib/gcc/riscv64-unknown-elf/8.1.0/../../../../riscv64-unknown-elf/bin/ld: /home/namnguyendc4/Testtt/linux-on-litex-vexriscv/opensbi/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14/bin/../lib/gcc/riscv64-unknown-elf/8.1.0/libgcc.a(div.o): ABI is incompatible with that of the selected emulation:
target emulation elf64-littleriscv' does not match elf32-littleriscv'
/home/namnguyendc4/Testtt/linux-on-litex-vexriscv/opensbi/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14/bin/../lib/gcc/riscv64-unknown-elf/8.1.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /home/namnguyendc4/Testtt/linux-on-litex-vexriscv/opensbi/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14/bin/../lib/gcc/riscv64-unknown-elf/8.1.0/libgcc.a(div.o)
collect2: error: ld returned 1 exit status
make: *** [Makefile:317: /home/namnguyendc4/Testtt/linux-on-litex-vexriscv/opensbi/build/platform/litex/vexriscv/firmware/fw_dynamic.elf] Error 1

[zoro269]

This leads to the file opensbi/build/platform/litex/vexriscv/firmware there is no file fw_payload.bin
and here is a picture of my firmware

[enjoy-digital]

@zoro269: Can you test with the GCC toolchain provided by python3 litex_setup.py --gcc=riscv?

(https://github.com/enjoy-digital/litex/blob/master/litex_setup.py#L323-L345)

[zoro269]

@enjoy-digital I have installed and tried the toolchain and still have the error

[zoro269]

@zoro269: Can you test with the GCC toolchain provided by python3 litex_setup.py --gcc=riscv?

(https://github.com/enjoy-digital/litex/blob/master/litex_setup.py#L323-L345)

@enjoy-digital
i tried it and it still fails

[zoro269]

@enjoy-digital

@zoro269: Can you test with the GCC toolchain provided by python3 litex_setup.py --gcc=riscv?

(https://github.com/enjoy-digital/litex/blob/master/litex_setup.py#L323-L345)

Thanks guys, I fixed it with the gcc toolchain that was shown and downloaded in the litex_setup.py file. But can you guys explain to me the difference between these two versions of gcc toolchain?

[enjoy-digital]

Hi @zoro269,

the OpenSBI build probably require a minimum GCC version to build correctly. We haven't analyzed this so just recommend using the version that has been used successfully.

[myy1966]

make CROSS_COMPILE=riscv64-unknown-elf- PLATFORM=litex/vexriscv
I get this error:
unrecognized opcode csrr a4,0x301', extension zicsr' required

How to fix it?

[Dolu1990]

Either you get a older version of gcc (11.x) either would need to fix the flow to add the _zicsr to the march

[myy1966]

Either you get a older version of gcc (11.x) either would need to fix the flow to add the _zicsr to the march

After changed PLATFORM_RISCV_ISA from rv32ima to rv32ima_zicsr_zifencei, I successfully built 1.3.1-linux-on-litex-vexriscv branch opensbi binary and used it to run sim.py.

I need to highlight two points that differ from enjoy-digital's description:

1. After changed PLATFORM_RISCV_ISA from rv32ima to rv32ima_zicsr_zifencei, 0.8-linux-on-litex-vexriscv can built to binary but failed to boot linux. We should use 1.3.1-linux-on-litex-vexriscv.
2. We should use fw_jump.bin instead of fw_payload.bin. The fw_payload.bin file has reached a size of 1.1 GB and contains a dump payload instead of booting the user-provided Linux kernel image.