sh: Preliminary support for SH-X2 MMU.

This adds some preliminary support for the SH-X2 MMU, used by
newer SH-4A parts (particularly SH7785).

This MMU implements a 'compat' mode with SH-X MMUs and an
'extended' mode for SH-X2 extended features. Extended features
include additional page sizes (8kB, 4MB, 64MB), as well as the
addition of page execute permissions.

The extended mode attributes are placed in a second data array,
which requires us to switch to 64-bit PTEs when in X2 mode.

With the addition of the exec perms, we also overhaul the mmap
prots somewhat, now that it's possible to handle them more
intelligently.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 7154d1ce9785..8b275166f400 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -93,7 +93,7 @@ static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
         pud = pud_offset(pgd, addr);
         if (pud_none(*pud)) {
                 pmd = (pmd_t *)get_zeroed_page(GFP_ATOMIC);
-                set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
+                set_pud(pud, __pud(__pa(pmd) | _PAGE_TABLE));
                 if (pmd != pmd_offset(pud, 0)) {
                         pud_ERROR(*pud);
                         return;
@@ -103,7 +103,7 @@ static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
         pmd = pmd_offset(pud, addr);
         if (pmd_none(*pmd)) {
                 pte = (pte_t *)get_zeroed_page(GFP_ATOMIC);
-                set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
+                set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
                 if (pte != pte_offset_kernel(pmd, 0)) {
                         pmd_ERROR(*pmd);
                         return;