arch/unicore32/mm/mm.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * linux/arch/unicore32/mm/mm.h
   4  *
   5  * Code specific to PKUnity SoC and UniCore ISA
   6  *
   7  * Copyright (C) 2001-2010 GUAN Xue-tao
   8  */
   9 #include <asm/hwdef-copro.h>
  10
  11 /* the upper-most page table pointer */
  12 extern pmd_t *top_pmd;
  13 extern int sysctl_overcommit_memory;
  14
  15 #define TOP_PTE(x)      pte_offset_kernel(top_pmd, x)
  16
  17 static inline pmd_t *pmd_off(pgd_t *pgd, unsigned long virt)
  18 {
  19         return pmd_offset((pud_t *)pgd, virt);
  20 }
  21
  22 static inline pmd_t *pmd_off_k(unsigned long virt)
  23 {
  24         return pmd_off(pgd_offset_k(virt), virt);
  25 }
  26
  27 struct mem_type {
  28         unsigned int prot_pte;
  29         unsigned int prot_l1;
  30         unsigned int prot_sect;
  31 };
  32
  33 const struct mem_type *get_mem_type(unsigned int type);
  34
  35 extern void __flush_dcache_page(struct address_space *, struct page *);
  36 extern void hook_fault_code(int nr, int (*fn)
  37                 (unsigned long, unsigned int, struct pt_regs *),
  38                 int sig, int code, const char *name);
  39
  40 void __init bootmem_init(void);
  41 void uc32_mm_memblock_reserve(void);