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/
usr/
src/
linux-headers-3.0.0-14/
arch/
xtensa/
include/
asm/
- drwxr-xr-x
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Viewing file:  pgalloc.h (1.8 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* include/asm-xtensa/pgalloc.h
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Copyright (C) 2001-2007 Tensilica Inc.
*/
#ifndef _XTENSA_PGALLOC_H
#define _XTENSA_PGALLOC_H
#ifdef __KERNEL__
#include <linux/highmem.h>
#include <linux/slab.h>
/*
* Allocating and freeing a pmd is trivial: the 1-entry pmd is
* inside the pgd, so has no extra memory associated with it.
*/
#define pmd_populate_kernel(mm, pmdp, ptep) \
(pmd_val(*(pmdp)) = ((unsigned long)ptep))
#define pmd_populate(mm, pmdp, page) \
(pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
#define pmd_pgtable(pmd) pmd_page(pmd)
static inline pgd_t*
pgd_alloc(struct mm_struct *mm)
{
return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
}
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
/* Use a slab cache for the pte pages (see also sparc64 implementation) */
extern struct kmem_cache *pgtable_cache;
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
{
return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT);
}
static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long addr)
{
struct page *page;
page = virt_to_page(pte_alloc_one_kernel(mm, addr));
pgtable_page_ctor(page);
return page;
}
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
kmem_cache_free(pgtable_cache, pte);
}
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
kmem_cache_free(pgtable_cache, page_address(pte));
}
#define pmd_pgtable(pmd) pmd_page(pmd)
#endif /* __KERNEL__ */
#endif /* _XTENSA_PGALLOC_H */
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