[Qemu-devel] [PATCH for-2.5] sparc: allow CASA with ASI 0xa from user space

[Richard Henderson <rth@twiddle.net>]

On 12/04/2015 07:01 AM, Alex Zuepke wrote:
> LEON3 allows the CASA instruction to be used from user space
> if the ASI is set to 0xa (user data).
> 
> Signed-off-by: Alex Zuepke <azu@sysgo.de>
> ---
>  target-sparc/translate.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/target-sparc/translate.c b/target-sparc/translate.c
> index 41a3319..63440dd 100644
> --- a/target-sparc/translate.c
> +++ b/target-sparc/translate.c
> @@ -5097,7 +5097,8 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
>                      if (IS_IMM) {
>                          goto illegal_insn;
>                      }
> -                    if (!supervisor(dc)) {
> +                    /* LEON3 allows CASA from user space with ASI 0xa */
> +                    if ((GET_FIELD(insn, 19, 26) != 0xa) && !supervisor(dc)) {
>                          goto priv_insn;
>                      }
>  #endif
> 

Reviewed-by: Richard Henderson <rth@twiddle.net>

This should probably be merged for 2.5.

For 2.6, I have a branch with substantial changes for the sparc backend.  Part
of which totally revamps the way ASIs are handled.  I believe it gets this
right.  See

  git://github.com/rth7680/qemu.git tgt-sparc


r~