Merge branch 'sh/pgtable' of git://github.com/mfleming/linux-2.6

arch/sh/mm/Kconfig

@@ -219,7 +219,7 @@ config PAGE_SIZE_4KB
 
 config PAGE_SIZE_8KB
 	bool "8kB"
-	depends on !MMU || X2TLB && !PGTABLE_LEVELS_3
+	depends on !MMU || X2TLB
 	help
 	  This enables 8kB pages as supported by SH-X2 and later MMUs.
 
@@ -231,7 +231,7 @@ config PAGE_SIZE_16KB
 
 config PAGE_SIZE_64KB
 	bool "64kB"
-	depends on !MMU || CPU_SH4 && !PGTABLE_LEVELS_3 || CPU_SH5
+	depends on !MMU || CPU_SH4 || CPU_SH5
 	help
 	  This enables support for 64kB pages, possible on all SH-4
 	  CPUs and later.

arch/sh/mm/Makefile

@@ -15,7 +15,7 @@ obj-y			+= $(cacheops-y)
 
 mmu-y			:= nommu.o extable_32.o
 mmu-$(CONFIG_MMU)	:= extable_$(BITS).o fault_$(BITS).o \
-			   ioremap_$(BITS).o kmap.o tlbflush_$(BITS).o
+			   ioremap_$(BITS).o kmap.o pgtable.o tlbflush_$(BITS).o
 
 obj-y			+= $(mmu-y)
 obj-$(CONFIG_DEBUG_FS)	+= asids-debugfs.o

arch/sh/mm/cache-sh4.c

@@ -109,6 +109,7 @@ static inline void flush_cache_one(unsigned long start, unsigned long phys)
 static void sh4_flush_dcache_page(void *arg)
 {
 	struct page *page = arg;
+	unsigned long addr = (unsigned long)page_address(page);
 #ifndef CONFIG_SMP
 	struct address_space *mapping = page_mapping(page);
 
@@ -116,16 +117,8 @@ static void sh4_flush_dcache_page(void *arg)
 		set_bit(PG_dcache_dirty, &page->flags);
 	else
 #endif
-	{
-		unsigned long phys = page_to_phys(page);
-		unsigned long addr = CACHE_OC_ADDRESS_ARRAY;
-		int i, n;
-
-		/* Loop all the D-cache */
-		n = boot_cpu_data.dcache.n_aliases;
-		for (i = 0; i < n; i++, addr += PAGE_SIZE)
-			flush_cache_one(addr, phys);
-	}
+		flush_cache_one(CACHE_OC_ADDRESS_ARRAY |
+				(addr & shm_align_mask), page_to_phys(page));
 
 	wmb();
 }

arch/sh/mm/pgtable.c

@@ -0,0 +1,57 @@
+#include <linux/mm.h>
+
+#define PGALLOC_GFP GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO
+
+static struct kmem_cache *pgd_cachep;
+
+#ifdef CONFIG_PGTABLE_LEVELS_3
+static struct kmem_cache *pmd_cachep;
+#endif
+
+void pgd_ctor(void *x)
+{
+	pgd_t *pgd = x;
+
+	memcpy(pgd + USER_PTRS_PER_PGD,
+	       swapper_pg_dir + USER_PTRS_PER_PGD,
+	       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+}
+
+void pgtable_cache_init(void)
+{
+	pgd_cachep = kmem_cache_create("pgd_cache",
+				       PTRS_PER_PGD * (1<<PTE_MAGNITUDE),
+				       PAGE_SIZE, SLAB_PANIC, pgd_ctor);
+#ifdef CONFIG_PGTABLE_LEVELS_3
+	pmd_cachep = kmem_cache_create("pmd_cache",
+				       PTRS_PER_PMD * (1<<PTE_MAGNITUDE),
+				       PAGE_SIZE, SLAB_PANIC, NULL);
+#endif
+}
+
+pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+	return kmem_cache_alloc(pgd_cachep, PGALLOC_GFP);
+}
+
+void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+	kmem_cache_free(pgd_cachep, pgd);
+}
+
+#ifdef CONFIG_PGTABLE_LEVELS_3
+void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+{
+	set_pud(pud, __pud((unsigned long)pmd));
+}
+
+pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+	return kmem_cache_alloc(pmd_cachep, PGALLOC_GFP);
+}
+
+void pmd_free(struct mm_struct *mm, pmd_t *pmd)
+{
+	kmem_cache_free(pmd_cachep, pmd);
+}
+#endif /* CONFIG_PGTABLE_LEVELS_3 */