On 01.04.21 09:56, Anup Patel wrote:
-----Original Message----- From: Heinrich Schuchardt xypron.glpk@gmx.de Sent: 01 April 2021 12:40 To: Anup Patel Anup.Patel@wdc.com Cc: Carl Perry caperry@edolnx.net; BeagleV Beta <beaglev- beta@googlegroups.com>; Drew Fustini drew@beagleboard.org; Wei Fu tekkamanninja@gmail.com Subject: Re: [BeagleV Beta] Questions about bootup
On 4/1/21 7:22 AM, Drew Fustini wrote:
On Wed, Mar 31, 2021 at 9:51 PM Anup Patel Anup.Patel@wdc.com
wrote:
<snip/>
We will be sending out Linux RISC-V patches to totally remove SBI v0.1
support.
Once this is done, the upstream Linux RISC-V will not work with BBL because BBL is stuck at SBI v0.1.
Hello Anup,
Will you do the same for U-Boot? This would allow to simplify the coding.
Sure, I can do that for U-Boot as well. The idea is to make SBI v0.2 as the minimal required SBI version on all important open-source projects so that these projects don't need to keep supporting the legacy SBI v0.1 which is not at all extensible.
Yes, SBI v0.1 is obsolete.
microchip_mpfs_icicle_defconfig is currently the only board using CONFIG_SBI_V01.
According to https://u-boot.readthedocs.io/en/latest/board/microchip/mpfs_icicle.html it is already on OpenSBI.
I hope Padmarao and Cyril can lift this platform to use the current version of OpenSBI.
Best regards
Heinrich
Do you want to keep non-SBI compatibility?
Linux M-mode (and U-Boot M-mode) will always be non-SBI whereas Linux S-mode (and U-Boot S-mode) will always be SBI aware.
Regards, Anup