Re: [PATCH v4 06/10] hw/arm/aspeed: Add support for loading vbootrom image via "-bios"

[Cédric Le Goater]

Hello Jamin,

+ Phil.

On 4/23/25 09:02, Jamin Lin wrote:
> Hi Cedric,
>
> > Cc: Troy Lee <troy_lee@aspeedtech.com>; nabihestefan@google.com
> > Subject: Re: [PATCH v4 06/10] hw/arm/aspeed: Add support for loading
> > vbootrom image via "-bios"
> >
> > Hello Jamin,
> >
> > > Based on the design of aspeed_install_boot_rom, users can place their
> > > ROM code at the top of the image-bmc, and this function will install
> > > image-bmc which included the user's ROM IMAGE at the
> > > ASPEED_DEV_SPI_BOOT address.  For AST2600, users typically set the
> > > boot address to 0x0 and boot directly from there.
> > >
> > > For AST2700, we introduced a vbootrom to simulate the ROM code and the
> > > BOOTMCU SPL (RISC-V).
> >
> > Side question, is anyone working on the BOOTMCU SPL (RISC-V) models ?
> > heterogeneous machines should be supported one day.
>
> Troy developed an initial implementation, but testing has not yet been 
> performed due to uncertainty around
> "how to share DRAM memory and controllers registers" between the RISC-V and the 
> Cortex-A35 cores.
> Furthermore, RISC-V interrupt support is currently not implemented.
Could you explain a bit more the issues you are facing ? Single QEMU
binary is expected to become a reality in the near future and the
ast2700 models could benefit from it.


Thanks,

C.