97 lines
1.9 KiB
C
97 lines
1.9 KiB
C
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/*
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* Copyright (C) 2004-2006 Atmel Corporation
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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 __ASM_AVR32_PGALLOC_H
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#define __ASM_AVR32_PGALLOC_H
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#include <asm/processor.h>
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#include <linux/threads.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#define pmd_populate_kernel(mm, pmd, pte) \
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set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
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static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
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struct page *pte)
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{
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set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
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}
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/*
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* Allocate and free page tables
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*/
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static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
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pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL);
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if (pgd)
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memset(pgd, 0, pgd_size);
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return pgd;
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}
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static inline void pgd_free(pgd_t *pgd)
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{
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kfree(pgd);
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}
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static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
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unsigned long address)
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{
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int count = 0;
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pte_t *pte;
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do {
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pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT);
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if (pte)
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clear_page(pte);
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else {
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current->state = TASK_UNINTERRUPTIBLE;
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schedule_timeout(HZ);
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}
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} while (!pte && (count++ < 10));
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return pte;
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}
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static inline struct page *pte_alloc_one(struct mm_struct *mm,
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unsigned long address)
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{
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int count = 0;
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struct page *pte;
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do {
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pte = alloc_pages(GFP_KERNEL, 0);
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if (pte)
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clear_page(page_address(pte));
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else {
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current->state = TASK_UNINTERRUPTIBLE;
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schedule_timeout(HZ);
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}
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} while (!pte && (count++ < 10));
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return pte;
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}
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static inline void pte_free_kernel(pte_t *pte)
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{
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free_page((unsigned long)pte);
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}
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static inline void pte_free(struct page *pte)
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{
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__free_page(pte);
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}
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#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
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#define check_pgt_cache() do { } while(0)
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#endif /* __ASM_AVR32_PGALLOC_H */
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