1 files changed, 88 insertions, 0 deletions

diff --git a/include/asm-sh/pgalloc.h b/include/asm-sh/pgalloc.h
new file mode 100644
index 000000000000..f4f233f7a4f5
--- /dev/null
+++ b/include/asm-sh/pgalloc.h
@@ -0,0 +1,88 @@
+#ifndef __ASM_SH_PGALLOC_H
+#define __ASM_SH_PGALLOC_H
+
+#include <linux/threads.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+
+#define pgd_quicklist ((unsigned long *)0)
+#define pmd_quicklist ((unsigned long *)0)
+#define pte_quicklist ((unsigned long *)0)
+#define pgtable_cache_size 0L
+
+#define pmd_populate_kernel(mm, pmd, pte) \
+                set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
+                                struct page *pte)
+{
+        set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
+}
+
+/*
+ * Allocate and free page tables.
+ */
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+        unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
+        pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL);
+
+        if (pgd)
+                memset(pgd, 0, pgd_size);
+
+        return pgd;
+}
+
+static inline void pgd_free(pgd_t *pgd)
+{
+        kfree(pgd);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+                                          unsigned long address)
+{
+        pte_t *pte;
+
+        pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
+
+        return pte;
+}
+
+static inline struct page *pte_alloc_one(struct mm_struct *mm,
+                                         unsigned long address)
+{
+        struct page *pte;
+
+        pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+
+        return pte;
+}
+
+static inline void pte_free_kernel(pte_t *pte)
+{
+        free_page((unsigned long)pte);
+}
+
+static inline void pte_free(struct page *pte)
+{
+        __free_page(pte);
+}
+
+#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
+
+/*
+ * allocating and freeing a pmd is trivial: the 1-entry pmd is
+ * inside the pgd, so has no extra memory associated with it.
+ */
+
+#define pmd_alloc_one(mm, addr)         ({ BUG(); ((pmd_t *)2); })
+#define pmd_free(x)                     do { } while (0)
+#define __pmd_free_tlb(tlb,x)           do { } while (0)
+#define pgd_populate(mm, pmd, pte)      BUG()
+#define check_pgt_cache()               do { } while (0)
+
+#ifdef CONFIG_CPU_SH4
+#define PG_mapped                       PG_arch_1
+#endif
+
+#endif /* __ASM_SH_PGALLOC_H */