[PATCH 1/2] bsps/riscv: Remove inaccurate statement about reliance on a boot loader

[Hesham Almatary]

On Tue, 25 Oct 2022 at 18:59, Alan Cudmore <alan.cudmore at gmail.com> wrote:
>
> I agree – I am working on a riscv BSP variant (Sipeed MAIX Bit with K210 CPU) where the RTEMS image can be flashed directly to the board and boots without a bootloader.
>
> I was also wondering if the statement “Each variant corresponds to a GCC multilib” is still accurate as BSP variants such as the FE310Arty and Microchip Polarfire are added?
>
I agree. It only applies to rv* BSPs. We should fix that.

> Thanks,
>
> Alan
>
> From: heshamelmatary at gmail.com
> Sent: Tuesday, October 25, 2022 1:48 PM
> To: devel at rtems.org
> Subject: [PATCH 1/2] bsps/riscv: Remove inaccurate statement about reliance on a boot loader
>
>
>
> From: Hesham Almatary <hesham.almatary at cl.cam.ac.uk>
>
>
>
> The BSP is capable of initialising the hardware being the first software
>
> that takes control on hardware reset (after the bootrom). For instance,
>
> using on QEMU's  virt platforms, RTEMS runs as a bios without BBL.
>
> Similarily, RTEMS can also be run on harware/FPGA and loaded using
>
> GDB; the bootrom (or a GDB script) should just set the a0/a1 registers
>
> with the boot HART ID and DTB address respectively.
>
> ---
>
> user/bsps/bsps-riscv.rst | 4 +---
>
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
>
>
> diff --git a/user/bsps/bsps-riscv.rst b/user/bsps/bsps-riscv.rst
>
> index 48e7ee7..224506d 100644
>
> --- a/user/bsps/bsps-riscv.rst
>
> +++ b/user/bsps/bsps-riscv.rst
>
> @@ -43,9 +43,7 @@ This BSP offers 15 variants:
>
> Each variant corresponds to a GCC multilib.  A particular variant reflects an
>
> ISA with ABI and code model choice.
>
> -The basic hardware initialization is not performed by the BSP.  A boot loader
>
> -with device tree support must be used to start the BSP, e.g. BBL.  The BSP must
>
> -be started im machine mode.
>
> +The BSP must be started im machine mode.
>
>  The reference platform for this BSP is the Qemu `virt` machine.
>
> --
>
> 2.25.1
>
>
>
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>
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>
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>



-- 
Hesham