sh: More tidying for large base pages.

There were a few more things that needed fixing up, namely THREAD_SIZE
and the TLB miss handler where certain PTRS_PER_PGD == PTRS_PER_PTE
assumptions were being made.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/asm-sh/pgtable.h b/include/asm-sh/pgtable.h
index 036ca28..eba1418 100644
--- a/include/asm-sh/pgtable.h
+++ b/include/asm-sh/pgtable.h
@@ -47,13 +47,13 @@
 #define PGDIR_MASK	(~(PGDIR_SIZE-1))
 
 /* Entries per level */
-#define PTRS_PER_PTE	(PAGE_SIZE / 4)
+#define PTRS_PER_PTE	(PAGE_SIZE / (1 << PTE_MAGNITUDE))
 #define PTRS_PER_PGD	(PAGE_SIZE / 4)
 
 #define USER_PTRS_PER_PGD	(TASK_SIZE/PGDIR_SIZE)
 #define FIRST_USER_ADDRESS	0
 
-#define PTE_PHYS_MASK	0x1ffff000
+#define PTE_PHYS_MASK		(0x20000000 - PAGE_SIZE)
 
 /*
  * First 1MB map is used by fixed purpose.