Re: [Qemu-devel] [RFC v6 11/14] softmmu: Simplify helper_*_st_name, wrap MMIO code

["Alex Bennée" <alex.bennee@linaro.org>]

Alvise Rigo <a.rigo@virtualopensystems.com> writes:

> Attempting to simplify the helper_*_st_name, wrap the MMIO code into an
> inline function.
>
> Suggested-by: Jani Kokkonen <jani.kokkonen@huawei.com>
> Suggested-by: Claudio Fontana <claudio.fontana@huawei.com>
> Signed-off-by: Alvise Rigo <a.rigo@virtualopensystems.com>
> ---
>  softmmu_template.h | 64 +++++++++++++++++++++++++++++++++++++-----------------
>  1 file changed, 44 insertions(+), 20 deletions(-)
>
> diff --git a/softmmu_template.h b/softmmu_template.h
> index 92f92b1..2ebf527 100644
> --- a/softmmu_template.h
> +++ b/softmmu_template.h
> @@ -396,6 +396,26 @@ static inline void glue(helper_le_st_name, _do_unl_access)(CPUArchState *env,
>      }
>  }
>
> +static inline void glue(helper_le_st_name, _do_mmio_access)(CPUArchState *env,
> +                                                            DATA_TYPE val,
> +                                                            target_ulong addr,
> +                                                            TCGMemOpIdx oi,
> +                                                            unsigned mmu_idx,
> +                                                            int index,
> +                                                            uintptr_t retaddr)
> +{
> +    CPUIOTLBEntry *iotlbentry = &env->iotlb[mmu_idx][index];
> +
> +    if ((addr & (DATA_SIZE - 1)) != 0) {
> +        glue(helper_le_st_name, _do_unl_access)(env, val, addr, mmu_idx,
> +                                                oi, retaddr);
> +    }
> +    /* ??? Note that the io helpers always read data in the target
> +       byte ordering.  We should push the LE/BE request down into io.  */
> +    val = TGT_LE(val);
> +    glue(io_write, SUFFIX)(env, iotlbentry, val, addr, retaddr);
> +}
> +

Some comment as previous patches. I think we can have a single function
that is shared between both helpers.

>  void helper_le_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
>                         TCGMemOpIdx oi, uintptr_t retaddr)
>  {
> @@ -458,16 +478,8 @@ void helper_le_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
>
>              return;
>          } else {
> -            if ((addr & (DATA_SIZE - 1)) != 0) {
> -                glue(helper_le_st_name, _do_unl_access)(env, val, addr, mmu_idx,
> -                                                        oi, retaddr);
> -            }
> -            iotlbentry = &env->iotlb[mmu_idx][index];
> -
> -            /* ??? Note that the io helpers always read data in the target
> -               byte ordering.  We should push the LE/BE request down into io.  */
> -            val = TGT_LE(val);
> -            glue(io_write, SUFFIX)(env, iotlbentry, val, addr, retaddr);
> +            glue(helper_le_st_name, _do_mmio_access)(env, val, addr, oi,
> +                                                     mmu_idx, index, retaddr);
>              return;
>          }
>      }
> @@ -523,6 +535,26 @@ static inline void glue(helper_be_st_name, _do_unl_access)(CPUArchState *env,
>      }
>  }
>
> +static inline void glue(helper_be_st_name, _do_mmio_access)(CPUArchState *env,
> +                                                            DATA_TYPE val,
> +                                                            target_ulong addr,
> +                                                            TCGMemOpIdx oi,
> +                                                            unsigned mmu_idx,
> +                                                            int index,
> +                                                            uintptr_t retaddr)
> +{
> +    CPUIOTLBEntry *iotlbentry = &env->iotlb[mmu_idx][index];
> +
> +    if ((addr & (DATA_SIZE - 1)) != 0) {
> +        glue(helper_be_st_name, _do_unl_access)(env, val, addr, mmu_idx,
> +                                                oi, retaddr);
> +    }
> +    /* ??? Note that the io helpers always read data in the target
> +       byte ordering.  We should push the LE/BE request down into io.  */
> +    val = TGT_BE(val);
> +    glue(io_write, SUFFIX)(env, iotlbentry, val, addr, retaddr);
> +}
> +
>  void helper_be_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
>                         TCGMemOpIdx oi, uintptr_t retaddr)
>  {
> @@ -585,16 +617,8 @@ void helper_be_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
>
>              return;
>          } else {
> -            if ((addr & (DATA_SIZE - 1)) != 0) {
> -                glue(helper_be_st_name, _do_unl_access)(env, val, addr, mmu_idx,
> -                                                        oi, retaddr);
> -            }
> -            iotlbentry = &env->iotlb[mmu_idx][index];
> -
> -            /* ??? Note that the io helpers always read data in the target
> -               byte ordering.  We should push the LE/BE request down into io.  */
> -            val = TGT_BE(val);
> -            glue(io_write, SUFFIX)(env, iotlbentry, val, addr, retaddr);
> +            glue(helper_be_st_name, _do_mmio_access)(env, val, addr, oi,
> +                                                     mmu_idx, index, retaddr);
>              return;
>          }
>      }


--
Alex Bennée