sh: Abstract the number of page table levels

Keep the dimensions of the page tables in a separate header file in
preparation for allowing a three level page table structure.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/include/asm/pgtable.h

@@ -12,7 +12,7 @@
 #ifndef __ASM_SH_PGTABLE_H
 #define __ASM_SH_PGTABLE_H
 
-#include <asm-generic/pgtable-nopmd.h>
+#include <asm/pgtable_nopmd.h>
 #include <asm/page.h>
 
 #ifndef __ASSEMBLY__
@@ -51,28 +51,12 @@ static inline unsigned long long neff_sign_extend(unsigned long val)
 #define	NPHYS_SIGN	(1LL << (NPHYS - 1))
 #define	NPHYS_MASK	(-1LL << NPHYS)
 
-/*
- * traditional two-level paging structure
- */
-/* PTE bits */
-#if defined(CONFIG_X2TLB) || defined(CONFIG_SUPERH64)
-# define PTE_MAGNITUDE	3	/* 64-bit PTEs on extended mode SH-X2 TLB */
-#else
-# define PTE_MAGNITUDE	2	/* 32-bit PTEs */
-#endif
-#define PTE_SHIFT	PAGE_SHIFT
-#define PTE_BITS	(PTE_SHIFT - PTE_MAGNITUDE)
-
-/* PGD bits */
-#define PGDIR_SHIFT	(PTE_SHIFT + PTE_BITS)
 #define PGDIR_SIZE	(1UL << PGDIR_SHIFT)
 #define PGDIR_MASK	(~(PGDIR_SIZE-1))
 
 /* Entries per level */
 #define PTRS_PER_PTE	(PAGE_SIZE / (1 << PTE_MAGNITUDE))
-#define PTRS_PER_PGD	(PAGE_SIZE / sizeof(pgd_t))
 
-#define USER_PTRS_PER_PGD	(TASK_SIZE/PGDIR_SIZE)
 #define FIRST_USER_ADDRESS	0
 
 #define PHYS_ADDR_MASK29		0x1fffffff