[SPARC64]: Deal with PTE layout differences in SUN4V.

Yes, you heard it right, they changed the PTE layout for
SUN4V.  Ho hum...

This is the simple and inefficient way to support this.
It'll get optimized, don't worry.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 18 insertions, 22 deletions

diff --git a/arch/sparc64/mm/generic.c b/arch/sparc64/mm/generic.c
index 580b63da836b..5fc5c579e35e 100644
--- a/arch/sparc64/mm/generic.c
+++ b/arch/sparc64/mm/generic.c
@@ -15,15 +15,6 @@
 #include <asm/page.h>
 #include <asm/tlbflush.h>
 
-static inline pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space)
-{
-        pte_t pte;
-        pte_val(pte) = (((page) | pgprot_val(prot) | _PAGE_E) &
-                        ~(unsigned long)_PAGE_CACHE);
-        pte_val(pte) |= (((unsigned long)space) << 32);
-        return pte;
-}
-
 /* Remap IO memory, the same way as remap_pfn_range(), but use
  * the obio memory space.
  *
@@ -48,24 +39,29 @@ static inline void io_remap_pte_range(struct mm_struct *mm, pte_t * pte,
                 pte_t entry;
                 unsigned long curend = address + PAGE_SIZE;
                 
-                entry = mk_pte_io(offset, prot, space);
+                entry = mk_pte_io(offset, prot, space, PAGE_SIZE);
                 if (!(address & 0xffff)) {
-                        if (!(address & 0x3fffff) && !(offset & 0x3ffffe) && end >= address + 0x400000) {
-                                entry = mk_pte_io(offset,
-                                                  __pgprot(pgprot_val (prot) | _PAGE_SZ4MB),
-                                                  space);
+                        if (PAGE_SIZE < (4 * 1024 * 1024) &&
+                            !(address & 0x3fffff) &&
+                            !(offset & 0x3ffffe) &&
+                            end >= address + 0x400000) {
+                                entry = mk_pte_io(offset, prot, space,
+                                                  4 * 1024 * 1024);
                                 curend = address + 0x400000;
                                 offset += 0x400000;
-                        } else if (!(address & 0x7ffff) && !(offset & 0x7fffe) && end >= address + 0x80000) {
-                                entry = mk_pte_io(offset,
-                                                  __pgprot(pgprot_val (prot) | _PAGE_SZ512K),
-                                                  space);
+                        } else if (PAGE_SIZE < (512 * 1024) &&
+                                   !(address & 0x7ffff) &&
+                                   !(offset & 0x7fffe) &&
+                                   end >= address + 0x80000) {
+                                entry = mk_pte_io(offset, prot, space,
+                                                  512 * 1024 * 1024);
                                 curend = address + 0x80000;
                                 offset += 0x80000;
-                        } else if (!(offset & 0xfffe) && end >= address + 0x10000) {
-                                entry = mk_pte_io(offset,
-                                                  __pgprot(pgprot_val (prot) | _PAGE_SZ64K),
-                                                  space);
+                        } else if (PAGE_SIZE < (64 * 1024) &&
+                                   !(offset & 0xfffe) &&
+                                   end >= address + 0x10000) {
+                                entry = mk_pte_io(offset, prot, space,
+                                                  64 * 1024);
                                 curend = address + 0x10000;
                                 offset += 0x10000;
                         } else