[OpenBIOS] [PATCH] SPARC32 : Clear FP register

[Blue Swirl]

Thanks, applied.

On Tue, Jan 22, 2013 at 9:37 PM, Olivier DANET <odanet at caramail.com> wrote:
> The Frame Pointer register is used in "__switch_context_nosave" (switch.S) which is called at the end of
> the startup sequence (entry.S). This register should be initialized before use.
> (The SparcV8 standard states, page 75 : "Supervisor software may not assume that any particular
> processor or memory state, except for the PSR’s ET and S bits, has been initialized after a reset trap."
>
> diff a/openbios-devel/arch/sparc32/entry.S b/openbios-devel/arch/sparc32/entry.S
> --- a/openbios-devel/arch/sparc32/entry.S
> +++ b/openbios-devel/arch/sparc32/entry.S
> @@ -452,6 +452,7 @@ highmem:
>          wr     %g3, PSR_ET, %psr
>          WRITE_PAUSE
>
> +        set     0, %fp
>          call    __switch_context_nosave
>           nop
>
> Signed-off-by: Olivier DANET <odanet at caramail.com>