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 #include <asm/hwdef-copro.h>
  13
  14 /* the upper-most page table pointer */
  15 extern pmd_t *top_pmd;
  16 extern int sysctl_overcommit_memory;
  17
  18 #define TOP_PTE(x)      pte_offset_kernel(top_pmd, x)
  19
  20 static inline pmd_t *pmd_off(pgd_t *pgd, unsigned long virt)
  21 {
  22         return pmd_offset((pud_t *)pgd, virt);
  23 }
  24
  25 static inline pmd_t *pmd_off_k(unsigned long virt)
  26 {
  27         return pmd_off(pgd_offset_k(virt), virt);
  28 }
  29
  30 struct mem_type {
  31         unsigned int prot_pte;
  32         unsigned int prot_l1;
  33         unsigned int prot_sect;
  34 };
  35
  36 const struct mem_type *get_mem_type(unsigned int type);
  37
  38 extern void __flush_dcache_page(struct address_space *, struct page *);
  39 extern void hook_fault_code(int nr, int (*fn)
  40                 (unsigned long, unsigned int, struct pt_regs *),
  41                 int sig, int code, const char *name);
  42
  43 void __init bootmem_init(void);
  44 void uc32_mm_memblock_reserve(void);