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
pmd_off(pgd_t * pgd,unsigned long virt)20 static inline pmd_t *pmd_off(pgd_t *pgd, unsigned long virt)
21 {
22 return pmd_offset((pud_t *)pgd, virt);
23 }
24
pmd_off_k(unsigned long virt)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);
45