71 строка
2.0 KiB
C
71 строка
2.0 KiB
C
/*
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* linux/include/asm-arm/pgalloc.h
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*
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* Copyright (C) 2000-2001 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _ASMARM_PGALLOC_H
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#define _ASMARM_PGALLOC_H
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#include <asm/processor.h>
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#include <asm/cacheflush.h>
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#include <asm/tlbflush.h>
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#include <linux/slab.h>
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extern kmem_cache_t *pte_cache;
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static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr){
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return kmem_cache_alloc(pte_cache, GFP_KERNEL);
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}
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static inline void pte_free_kernel(pte_t *pte){
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if (pte)
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kmem_cache_free(pte_cache, pte);
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}
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/*
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* Populate the pmdp entry with a pointer to the pte. This pmd is part
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* of the mm address space.
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*
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* If 'mm' is the init tasks mm, then we are doing a vmalloc, and we
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* need to set stuff up correctly for it.
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*/
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static inline void
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pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
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{
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//FIXME - is this doing the right thing?
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set_pmd(pmdp, (unsigned long)ptep | 1/*FIXME _PMD_PRESENT*/);
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}
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/*
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* FIXME - We use the old 2.5.5-rmk1 hack for this.
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* This is not truly correct, but should be functional.
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*/
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#define pte_alloc_one(mm,addr) ((struct page *)pte_alloc_one_kernel(mm,addr))
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#define pte_free(pte) pte_free_kernel((pte_t *)pte)
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#define pmd_populate(mm,pmdp,ptep) pmd_populate_kernel(mm,pmdp,(pte_t *)ptep)
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/*
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* Since we have only two-level page tables, these are trivial
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*
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* trick __pmd_alloc into optimising away. The actual value is irrelevant though as it
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* is thrown away. It just cant be zero. -IM
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*/
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#define pmd_alloc_one(mm,addr) ({ BUG(); ((pmd_t *)2); })
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#define pmd_free(pmd) do { } while (0)
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#define pgd_populate(mm,pmd,pte) BUG()
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extern pgd_t *get_pgd_slow(struct mm_struct *mm);
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extern void free_pgd_slow(pgd_t *pgd);
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#define pgd_alloc(mm) get_pgd_slow(mm)
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#define pgd_free(pgd) free_pgd_slow(pgd)
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#define check_pgt_cache() do { } while (0)
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#endif
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