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-rw-r--r--arch/sh/mm/pgtable.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/sh/mm/pgtable.c b/arch/sh/mm/pgtable.c
new file mode 100644
index 0000000..6f21fb1
--- /dev/null
+++ b/arch/sh/mm/pgtable.c
@@ -0,0 +1,56 @@
+#include <linux/mm.h>
+
+#define PGALLOC_GFP GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO
+
+static struct kmem_cache *pgd_cachep;
+#if PAGETABLE_LEVELS > 2
+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);
+#if PAGETABLE_LEVELS > 2
+ 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);
+}
+
+#if PAGETABLE_LEVELS > 2
+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 /* PAGETABLE_LEVELS > 2 */
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