Re: [PATCH 00/20] RISC-V: rework for PBL, VIRT and 64-Bit support

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On Sun, 14 Mar 2021 13:27:44 +0100
Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> wrote:

Hi!

I'm very glad to see RISC-V support improvement!

Can you please push your RISC-V working branch to github (or other public git repo),
so I can test it too?

At the moment I have at least two out-of tree RISC-V branches that which I want
to rebase on latest barebox with your patches:

  * https://github.com/frantony/barebox/tree/20200222.riscv-sifive 
    contains hacky 64-bit support and add Sifive U500 qemu support.
    
  * https://github.com/litex-hub/barebox/tree/20200727.litex-vexriscv-linux
    contains litex SoC with RISC-V 32-bit CPU core support.
    It can run linux on Arty, please see
    https://github.com/enjoy-digital/litex/issues/413#issuecomment-609047340

    It seems, that ethernet driver needs update: https://github.com/litex-hub/barebox/issues/1

I suppose that you can add 'bootm: add RISC-V image type' patch to your series 
(I'll send you the patch in a few minutes). The patch used in the litex series.


> With these changes applied, barebox can now generate images that can
> be booted on qemu/tinyemu virt32 and virt64 machines.
> 
> The boards have clocksource, virtio, cfi-flash,  reboot and poweroff
> support.
> 
> Cheers,
> Ahmad Fatoum (18):
>   partitions: don't allocate dma capable memory
>   images: make BOARD_ARM_GENERIC_DT available for other arches
>   ARM: rename CONFIG_ARM_USE_COMPRESSED_DTB to CONFIG_USE_COMPRESSED_DTB
>   ARM: aarch64: ommit unused label in assembly
>   serial: virtio-console: depend on, but don't select VIRTIO
>   filetype: detect RISC-V Linux kernel image
>   asm: unaligned: don't do unaligned accesses
>   RISC-V: debug_ll: ns16550: align C access size with assembly's
>   RISC-V: drop duplicate or unneeded cflags
>   RISC-V: add cacheless HAS_DMA support
>   RISC-V: erizo: move to arch/riscv/boards/erizo
>   RISC-V: import Linux' optimized string functions
>   RISC-V: implement PBL and relocation support
>   RISC-V: erizo: migrate to PBL
>   RISC-V: support symbol names in barebox image
>   RISC-V: add generic DT image
>   clocksource: add driver for RISC-V CLINT timer
>   power: reset: add drivers for generic syscon reset and poweroff
> 
> Rouven Czerwinski (2):
>   RISC-V: add 64-bit support
>   RISC-V: add Qemu virt support
> 
>  Documentation/boards/riscv.rst               |  72 ++++++-
>  Makefile                                     |   1 +
>  arch/arm/Kconfig                             |   9 +-
>  arch/arm/cpu/start.c                         |   2 +-
>  arch/arm/lib64/runtime-offset.S              |   2 +-
>  arch/arm/mach-at91/Kconfig                   |   2 +-
>  arch/arm/mach-imx/Kconfig                    |  26 +--
>  arch/arm/mach-omap/Kconfig                   |   2 +-
>  arch/riscv/Kconfig                           |  66 +++++--
>  arch/riscv/Makefile                          |  34 ++--
>  arch/riscv/boards/Makefile                   |   2 +
>  arch/riscv/boards/erizo/Makefile             |   3 +
>  arch/riscv/boards/erizo/lowlevel.c           |  18 ++
>  arch/riscv/boot/Makefile                     |   5 +-
>  arch/riscv/boot/board-dt-2nd-entry.S         |  26 +++
>  arch/riscv/boot/board-dt-2nd.c               |  29 +++
>  arch/riscv/boot/dtb.c                        |  25 ---
>  arch/riscv/boot/entry.c                      |  33 ++++
>  arch/riscv/boot/entry.h                      |  15 ++
>  arch/riscv/boot/entry_ll.S                   |  15 ++
>  arch/riscv/boot/main_entry.c                 |  35 ----
>  arch/riscv/boot/start.S                      |  68 -------
>  arch/riscv/boot/start.c                      | 197 +++++++++++++++++++
>  arch/riscv/boot/uncompress.c                 |  74 +++++++
>  arch/riscv/configs/erizo_generic_defconfig   |   5 -
>  arch/riscv/configs/virt32_defconfig          | 117 +++++++++++
>  arch/riscv/configs/virt64_defconfig          | 118 +++++++++++
>  arch/riscv/dts/Makefile                      |   9 +-
>  arch/riscv/include/asm/barebox-riscv.h       | 101 ++++++++++
>  arch/riscv/include/asm/common.h              |  10 +-
>  arch/riscv/include/asm/debug_ll_ns16550.h    |  16 +-
>  arch/riscv/include/asm/dma.h                 |  44 +++++
>  arch/riscv/include/asm/elf.h                 |   8 +-
>  arch/riscv/include/asm/image.h               |  65 ++++++
>  arch/riscv/include/asm/linkage.h             |   4 +
>  arch/riscv/include/asm/sections.h            |  15 ++
>  arch/riscv/include/asm/string.h              |  21 +-
>  arch/riscv/include/asm/types.h               |   8 +-
>  arch/riscv/include/asm/unaligned.h           |  16 +-
>  arch/riscv/lib/Makefile                      |   6 +-
>  arch/riscv/lib/barebox.lds.S                 |  55 ++++--
>  arch/riscv/lib/dtb.c                         |  26 +++
>  arch/riscv/lib/memcpy.S                      | 108 ++++++++++
>  arch/riscv/lib/memmove.S                     |  64 ++++++
>  arch/riscv/lib/memset.S                      | 113 +++++++++++
>  arch/riscv/lib/pbl.lds.S                     |  88 +++++++++
>  arch/riscv/lib/reloc.c                       |  64 ++++++
>  arch/riscv/lib/runtime-offset.S              |  12 ++
>  arch/riscv/lib/sections.c                    |   9 +
>  arch/riscv/lib/setupc.S                      |  55 ++++++
>  arch/riscv/mach-virt/Makefile                |   3 +
>  arch/riscv/mach-virt/include/mach/debug_ll.h |  25 +++
>  common/Kconfig                               |   8 +-
>  common/filetype.c                            |   3 +
>  common/partitions.c                          |   5 +-
>  common/partitions/dos.c                      |   7 +-
>  common/partitions/efi.c                      |   1 -
>  drivers/clocksource/Kconfig                  |   7 +
>  drivers/clocksource/Makefile                 |   1 +
>  drivers/clocksource/timer-clint.c            |  98 +++++++++
>  drivers/power/reset/Kconfig                  |  14 ++
>  drivers/power/reset/Makefile                 |   2 +
>  drivers/power/reset/syscon-poweroff.c        |  76 +++++++
>  drivers/power/reset/syscon-reboot.c          |  92 +++++++++
>  drivers/serial/Kconfig                       |   2 +-
>  images/Makefile                              |   8 +-
>  images/Makefile.erizo                        |  12 ++
>  include/dma.h                                |   1 +
>  include/filetype.h                           |   1 +
>  pbl/Kconfig                                  |   6 +-
>  scripts/.gitignore                           |   1 +
>  scripts/Makefile                             |   1 +
>  scripts/Makefile.lib                         |  11 ++
>  scripts/prelink-riscv.c                      | 122 ++++++++++++
>  scripts/prelink-riscv.inc                    | 123 ++++++++++++
>  75 files changed, 2285 insertions(+), 263 deletions(-)
>  create mode 100644 arch/riscv/boards/Makefile
>  create mode 100644 arch/riscv/boards/erizo/Makefile
>  create mode 100644 arch/riscv/boards/erizo/lowlevel.c
>  create mode 100644 arch/riscv/boot/board-dt-2nd-entry.S
>  create mode 100644 arch/riscv/boot/board-dt-2nd.c
>  delete mode 100644 arch/riscv/boot/dtb.c
>  create mode 100644 arch/riscv/boot/entry.c
>  create mode 100644 arch/riscv/boot/entry.h
>  create mode 100644 arch/riscv/boot/entry_ll.S
>  delete mode 100644 arch/riscv/boot/main_entry.c
>  delete mode 100644 arch/riscv/boot/start.S
>  create mode 100644 arch/riscv/boot/start.c
>  create mode 100644 arch/riscv/boot/uncompress.c
>  create mode 100644 arch/riscv/configs/virt32_defconfig
>  create mode 100644 arch/riscv/configs/virt64_defconfig
>  create mode 100644 arch/riscv/include/asm/barebox-riscv.h
>  create mode 100644 arch/riscv/include/asm/dma.h
>  create mode 100644 arch/riscv/include/asm/image.h
>  create mode 100644 arch/riscv/lib/dtb.c
>  create mode 100644 arch/riscv/lib/memcpy.S
>  create mode 100644 arch/riscv/lib/memmove.S
>  create mode 100644 arch/riscv/lib/memset.S
>  create mode 100644 arch/riscv/lib/pbl.lds.S
>  create mode 100644 arch/riscv/lib/reloc.c
>  create mode 100644 arch/riscv/lib/runtime-offset.S
>  create mode 100644 arch/riscv/lib/sections.c
>  create mode 100644 arch/riscv/lib/setupc.S
>  create mode 100644 arch/riscv/mach-virt/Makefile
>  create mode 100644 arch/riscv/mach-virt/include/mach/debug_ll.h
>  create mode 100644 drivers/clocksource/timer-clint.c
>  create mode 100644 drivers/power/reset/syscon-poweroff.c
>  create mode 100644 drivers/power/reset/syscon-reboot.c
>  create mode 100644 images/Makefile.erizo
>  create mode 100644 scripts/prelink-riscv.c
>  create mode 100644 scripts/prelink-riscv.inc
> 
> -- 
> 2.29.2
> 


-- 
Best regards,
  Antony Pavlov

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