Re: [PATCH v2 13/28] target/ppc/mmu_common.c: Split off real mode cases in get_physical_address_wtlb()

["Nicholas Piggin" <npiggin@gmail.com>]

On Thu May 2, 2024 at 9:43 AM AEST, BALATON Zoltan wrote:
> The real mode handling is identical in the remaining switch cases.
> Split off these common real mode cases into a separate conditional to
> leave only the else branches in the switch that are different.
>

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>

> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> ---
>  target/ppc/mmu_common.c | 34 +++++++++-------------------------
>  1 file changed, 9 insertions(+), 25 deletions(-)
>
> diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c
> index 24a9b9ef19..3132030baa 100644
> --- a/target/ppc/mmu_common.c
> +++ b/target/ppc/mmu_common.c
> @@ -1188,7 +1188,6 @@ int get_physical_address_wtlb(CPUPPCState *env, mmu_ctx_t *ctx,
>                                       MMUAccessType access_type, int type,
>                                       int mmu_idx)
>  {
> -    int ret = -1;
>      bool real_mode;
>  
>      if (env->mmu_model == POWERPC_MMU_BOOKE) {
> @@ -1200,38 +1199,23 @@ int get_physical_address_wtlb(CPUPPCState *env, mmu_ctx_t *ctx,
>  
>      real_mode = (type == ACCESS_CODE) ? !FIELD_EX64(env->msr, MSR, IR)
>                                        : !FIELD_EX64(env->msr, MSR, DR);
> +    if (real_mode && (env->mmu_model == POWERPC_MMU_SOFT_6xx ||
> +                      env->mmu_model == POWERPC_MMU_SOFT_4xx ||
> +                      env->mmu_model == POWERPC_MMU_REAL)) {
> +        return check_physical(env, ctx, eaddr, access_type);
> +    }
>  
>      switch (env->mmu_model) {
>      case POWERPC_MMU_SOFT_6xx:
> -        if (real_mode) {
> -            ret = check_physical(env, ctx, eaddr, access_type);
> -        } else {
> -            ret = mmu6xx_get_physical_address(env, ctx, eaddr, access_type,
> -                                              type);
> -        }
> -        break;
> -
> +        return mmu6xx_get_physical_address(env, ctx, eaddr, access_type, type);
>      case POWERPC_MMU_SOFT_4xx:
> -        if (real_mode) {
> -            ret = check_physical(env, ctx, eaddr, access_type);
> -        } else {
> -            ret = mmu40x_get_physical_address(env, ctx, eaddr, access_type);
> -        }
> -        break;
> +        return mmu40x_get_physical_address(env, ctx, eaddr, access_type);
>      case POWERPC_MMU_REAL:
> -        if (real_mode) {
> -            ret = check_physical(env, ctx, eaddr, access_type);
> -        } else {
> -            cpu_abort(env_cpu(env),
> -                      "PowerPC in real mode do not do any translation\n");
> -        }
> -        return -1;
> +        cpu_abort(env_cpu(env),
> +                  "PowerPC in real mode do not do any translation\n");
>      default:
>          cpu_abort(env_cpu(env), "Unknown or invalid MMU model\n");
> -        return -1;
>      }
> -
> -    return ret;
>  }
>  
>  static void booke206_update_mas_tlb_miss(CPUPPCState *env, target_ulong address,