1 files changed, 96 insertions, 0 deletions

diff --git a/arch/sh/include/asm/pgalloc.h b/arch/sh/include/asm/pgalloc.h
new file mode 100644
index 000000000000..84dd2db7104c
--- /dev/null
+++ b/arch/sh/include/asm/pgalloc.h
@@ -0,0 +1,96 @@
+#ifndef __ASM_SH_PGALLOC_H
+#define __ASM_SH_PGALLOC_H
+
+#include <linux/quicklist.h>
+#include <asm/page.h>
+
+#define QUICK_PGD 0     /* We preserve special mappings over free */
+#define QUICK_PT 1      /* Other page table pages that are zero on free */
+
+static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
+                                       pte_t *pte)
+{
+        set_pmd(pmd, __pmd((unsigned long)pte));
+}
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
+                                pgtable_t pte)
+{
+        set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
+}
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
+static inline 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));
+}
+
+/*
+ * Allocate and free page tables.
+ */
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+        return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
+}
+
+static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+        quicklist_free(QUICK_PGD, NULL, pgd);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+                                          unsigned long address)
+{
+        return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
+}
+
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
+                                        unsigned long address)
+{
+        struct page *page;
+        void *pg;
+
+        pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
+        if (!pg)
+                return NULL;
+        page = virt_to_page(pg);
+        pgtable_page_ctor(page);
+        return page;
+}
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+        quicklist_free(QUICK_PT, NULL, pte);
+}
+
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
+{
+        pgtable_page_dtor(pte);
+        quicklist_free_page(QUICK_PT, NULL, pte);
+}
+
+#define __pte_free_tlb(tlb,pte)                         \
+do {                                                    \
+        pgtable_page_dtor(pte);                         \
+        tlb_remove_page((tlb), (pte));                  \
+} while (0)
+
+/*
+ * 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_free(mm, x)                 do { } while (0)
+#define __pmd_free_tlb(tlb,x)           do { } while (0)
+
+static inline void check_pgt_cache(void)
+{
+        quicklist_trim(QUICK_PGD, NULL, 25, 16);
+        quicklist_trim(QUICK_PT, NULL, 25, 16);
+}
+
+#endif /* __ASM_SH_PGALLOC_H */