On Fri, Jan 23, 2015 at 12:20 PM, Peter Maydell
<peter.mayd...@linaro.org> wrote:
> Although M profile doesn't have the same concept of exception level
> as A profile, it does have a notion of privileged versus not, which
> we currently track in the privmode TB flag. Support returning this
> information if arm_current_el() is called on an M profile core, so
> that we can identify the correct MMU index to use (and put the MMU
> index in the TB flags) without having to special-case M profile.
>
> Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
> ---
> target-arm/cpu.h | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/target-arm/cpu.h b/target-arm/cpu.h
> index cd7a9e8..3eb00f4 100644
> --- a/target-arm/cpu.h
> +++ b/target-arm/cpu.h
> @@ -1211,6 +1211,10 @@ static inline bool cptype_valid(int cptype)
> */
> static inline int arm_current_el(CPUARMState *env)
> {
> + if (arm_feature(env, ARM_FEATURE_M)) {
> + return !((env->v7m.exception == 0) && (env->v7m.control & 1));
> + }
> +
> if (is_a64(env)) {
> return extract32(env->pstate, 2, 2);
> }
> --
> 1.9.1
>
Reviewed-by: Greg Bellows <greg.bell...@linaro.org>
