LXR linux/arch/nds32/include/asm/pgalloc.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2// Copyright (C) 2005-2017 Andes Technology Corporation
   3
   4#ifndef _ASMNDS32_PGALLOC_H
   5#define _ASMNDS32_PGALLOC_H
   6
   7#include <asm/processor.h>
   8#include <asm/cacheflush.h>
   9#include <asm/tlbflush.h>
  10#include <asm/proc-fns.h>
  11
  12#define __HAVE_ARCH_PTE_ALLOC_ONE
  13#include <asm-generic/pgalloc.h>        /* for pte_{alloc,free}_one */
  14
  15extern pgd_t *pgd_alloc(struct mm_struct *mm);
  16extern void pgd_free(struct mm_struct *mm, pgd_t * pgd);
  17
  18static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
  19{
  20        pgtable_t pte;
  21
  22        pte = __pte_alloc_one(mm, GFP_PGTABLE_USER);
  23        if (pte)
  24                cpu_dcache_wb_page((unsigned long)page_address(pte));
  25
  26        return pte;
  27}
  28
  29/*
  30 * Populate the pmdp entry with a pointer to the pte.  This pmd is part
  31 * of the mm address space.
  32 *
  33 * Ensure that we always set both PMD entries.
  34 */
  35static inline void
  36pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmdp, pte_t * ptep)
  37{
  38        unsigned long pte_ptr = (unsigned long)ptep;
  39        unsigned long pmdval;
  40
  41        BUG_ON(mm != &init_mm);
  42
  43        /*
  44         * The pmd must be loaded with the physical
  45         * address of the PTE table
  46         */
  47        pmdval = __pa(pte_ptr) | _PAGE_KERNEL_TABLE;
  48        set_pmd(pmdp, __pmd(pmdval));
  49}
  50
  51static inline void
  52pmd_populate(struct mm_struct *mm, pmd_t * pmdp, pgtable_t ptep)
  53{
  54        unsigned long pmdval;
  55
  56        BUG_ON(mm == &init_mm);
  57
  58        pmdval = page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE;
  59        set_pmd(pmdp, __pmd(pmdval));
  60}
  61
  62#endif
  63