arch/unicore32/mm/mm.h

   1 /*
   2  * linux/arch/unicore32/mm/mm.h
   3  *
   4  * Code specific to PKUnity SoC and UniCore ISA
   5  *
   6  * Copyright (C) 2001-2010 GUAN Xue-tao
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12 /* the upper-most page table pointer */
  13 extern pmd_t *top_pmd;
  14 extern int sysctl_overcommit_memory;
  15
  16 #define TOP_PTE(x)      pte_offset_kernel(top_pmd, x)
  17
  18 static inline pmd_t *pmd_off(pgd_t *pgd, unsigned long virt)
  19 {
  20         return pmd_offset((pud_t *)pgd, virt);
  21 }
  22
  23 static inline pmd_t *pmd_off_k(unsigned long virt)
  24 {
  25         return pmd_off(pgd_offset_k(virt), virt);
  26 }
  27
  28 struct mem_type {
  29         unsigned int prot_pte;
  30         unsigned int prot_l1;
  31         unsigned int prot_sect;
  32 };
  33
  34 const struct mem_type *get_mem_type(unsigned int type);
  35
  36 extern void __flush_dcache_page(struct address_space *, struct page *);
  37
  38 void __init bootmem_init(void);
  39 void uc32_mm_memblock_reserve(void);