sh: Better description of SH-4 PTEA register update.

Signed-off-by: Michael Trimarchi <trimarchimichael@yahoo.it>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 6 insertions, 3 deletions

diff --git a/arch/sh/mm/tlb-sh4.c b/arch/sh/mm/tlb-sh4.c
index f0c7b7397fa6..fd0d11f1a81c 100644
--- a/arch/sh/mm/tlb-sh4.c
+++ b/arch/sh/mm/tlb-sh4.c
@@ -61,9 +61,12 @@ void update_mmu_cache(struct vm_area_struct * vma,
          */
         ctrl_outl(pte.pte_high, MMU_PTEA);
 #else
-        if (cpu_data->flags & CPU_HAS_PTEA)
-                /* TODO: make this look less hacky */
-                ctrl_outl(((pteval >> 28) & 0xe) | (pteval & 0x1), MMU_PTEA);
+        if (cpu_data->flags & CPU_HAS_PTEA) {
+                /* The last 3 bits and the first one of pteval contains
+                 * the PTEA timing control and space attribute bits
+                 */
+                ctrl_outl(copy_ptea_attributes(pteval), MMU_PTEA);
+        }
 #endif
 
         /* Set PTEL register */