1 files changed, 125 insertions, 0 deletions

diff --git a/include/asm-mips/pgalloc.h b/include/asm-mips/pgalloc.h
new file mode 100644
index 000000000000..2d63f5ba403f
--- /dev/null
+++ b/include/asm-mips/pgalloc.h
@@ -0,0 +1,125 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
+ * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
+ */
+#ifndef _ASM_PGALLOC_H
+#define _ASM_PGALLOC_H
+
+#include <linux/config.h>
+#include <linux/highmem.h>
+#include <linux/mm.h>
+
+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,
+        struct page *pte)
+{
+        set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
+}
+
+/*
+ * Initialize a new pgd / pmd table with invalid pointers.
+ */
+extern void pgd_init(unsigned long page);
+extern void pmd_init(unsigned long page, unsigned long pagetable);
+
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+        pgd_t *ret, *init;
+
+        ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
+        if (ret) {
+                init = pgd_offset(&init_mm, 0);
+                pgd_init((unsigned long)ret);
+                memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
+                       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+        }
+
+        return ret;
+}
+
+static inline void pgd_free(pgd_t *pgd)
+{
+        free_pages((unsigned long)pgd, PGD_ORDER);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+        unsigned long address)
+{
+        pte_t *pte;
+
+        pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, PTE_ORDER);
+
+        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, PTE_ORDER);
+        if (pte)
+                clear_highpage(pte);
+
+        return pte;
+}
+
+static inline void pte_free_kernel(pte_t *pte)
+{
+        free_pages((unsigned long)pte, PTE_ORDER);
+}
+
+static inline void pte_free(struct page *pte)
+{
+        __free_pages(pte, PTE_ORDER);
+}
+
+#define __pte_free_tlb(tlb,pte)         tlb_remove_page((tlb),(pte))
+
+#ifdef CONFIG_MIPS32
+#define pgd_populate(mm, pmd, pte)      BUG()
+
+/*
+ * 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)
+#endif
+
+#ifdef CONFIG_MIPS64
+
+#define pgd_populate(mm, pgd, pmd)      set_pgd(pgd, __pgd(pmd))
+
+static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+        pmd_t *pmd;
+
+        pmd = (pmd_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT, PMD_ORDER);
+        if (pmd)
+                pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
+        return pmd;
+}
+
+static inline void pmd_free(pmd_t *pmd)
+{
+        free_pages((unsigned long)pmd, PMD_ORDER);
+}
+
+#define __pmd_free_tlb(tlb,x)   pmd_free(x)
+
+#endif
+
+#define check_pgt_cache()       do { } while (0)
+
+#endif /* _ASM_PGALLOC_H */