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 
pmd_off(pgd_t * pgd,unsigned long virt)18 static inline pmd_t *pmd_off(pgd_t *pgd, unsigned long virt)
19 {
20 	return pmd_offset((pud_t *)pgd, virt);
21 }
22 
pmd_off_k(unsigned long virt)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);
40