Re: [PATCH 8/8] Fixes for seconday CPU start-up.

[Richard Henderson]

On 6/2/21 8:53 PM, Jason Thorpe wrote:
> Changes to make secondary CPU start-up work on NetBSD, which depends
> on some specific behavior in the architecture specification:
>
> - Change the internal swppal() function to take the new VPTPTR and
>    Procedure Value as explicit arguments.  Adapt do_start() to the
>    new the new swppal() signature.
>
> - In do_start_wait(), extract the new VPTPTR and PV from the relevant
>    HWRPB fields, which will have been initialized by the OS, and pass
>    them to swppal().
>
> - In the SWPPAL PAL call, get the value to stuff into PV (r27) from
>    a4 (r20), and add a comment describing why this implementation detail
>    is allowed by the architecture specification.
>
> Signed-off-by: Jason Thorpe<thorpej@me.com>
> ---
>   init.c | 25 ++++++++++++++++---------
>   pal.S  | 13 ++++++++++---
>   2 files changed, 26 insertions(+), 12 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~