1/* 2 * linux/include/asm-arm/pgalloc.h 3 * 4 * Copyright (C) 2000-2001 Russell King 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10#ifndef _ASMARM_PGALLOC_H 11#define _ASMARM_PGALLOC_H 12 13#include <asm/processor.h> 14#include <asm/cacheflush.h> 15#include <asm/tlbflush.h> 16#include <linux/slab.h> 17 18extern struct kmem_cache *pte_cache; 19 20static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr){ 21 return kmem_cache_alloc(pte_cache, GFP_KERNEL); 22} 23 24static inline void pte_free_kernel(pte_t *pte){ 25 if (pte) 26 kmem_cache_free(pte_cache, pte); 27} 28 29/* 30 * Populate the pmdp entry with a pointer to the pte. This pmd is part 31 * of the mm address space. 32 * 33 * If 'mm' is the init tasks mm, then we are doing a vmalloc, and we 34 * need to set stuff up correctly for it. 35 */ 36static inline void 37pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) 38{ 39 set_pmd(pmdp, (unsigned long)ptep | 1); 40} 41 42#define pte_alloc_one(mm,addr) ((struct page *)pte_alloc_one_kernel(mm,addr)) 43#define pte_free(pte) pte_free_kernel((pte_t *)pte) 44#define pmd_populate(mm,pmdp,ptep) pmd_populate_kernel(mm,pmdp,(pte_t *)ptep) 45 46/* 47 * Since we have only two-level page tables, these are trivial 48 * 49 * trick __pmd_alloc into optimising away. The actual value is irrelevant though as it 50 * is thrown away. It just cant be zero. -IM 51 */ 52 53#define pmd_alloc_one(mm,addr) ({ BUG(); ((pmd_t *)2); }) 54#define pmd_free(pmd) do { } while (0) 55#define pgd_populate(mm,pmd,pte) BUG() 56 57extern pgd_t *get_pgd_slow(struct mm_struct *mm); 58extern void free_pgd_slow(pgd_t *pgd); 59 60#define pgd_alloc(mm) get_pgd_slow(mm) 61#define pgd_free(pgd) free_pgd_slow(pgd) 62 63#define check_pgt_cache() do { } while (0) 64 65#endif 66