mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-28 22:54:05 +08:00
71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
|
/*
|
||
|
|
* linux/include/asm-arm/pgalloc.h
|
||
|
|
*
|
||
|
|
* Copyright (C) 2000-2001 Russell King
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
#ifndef _ASMARM_PGALLOC_H
|
||
|
|
#define _ASMARM_PGALLOC_H
|
||
|
|
|
||
|
|
#include <asm/processor.h>
|
||
|
|
#include <asm/cacheflush.h>
|
||
|
|
#include <asm/tlbflush.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
|
||
|
|
extern kmem_cache_t *pte_cache;
|
||
|
|
|
||
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr){
|
||
|
|
return kmem_cache_alloc(pte_cache, GFP_KERNEL);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pte_free_kernel(pte_t *pte){
|
||
|
|
if (pte)
|
||
|
|
kmem_cache_free(pte_cache, pte);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Populate the pmdp entry with a pointer to the pte. This pmd is part
|
||
|
|
* of the mm address space.
|
||
|
|
*
|
||
|
|
* If 'mm' is the init tasks mm, then we are doing a vmalloc, and we
|
||
|
|
* need to set stuff up correctly for it.
|
||
|
|
*/
|
||
|
|
static inline void
|
||
|
|
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
|
||
|
|
{
|
||
|
|
//FIXME - is this doing the right thing?
|
||
|
|
set_pmd(pmdp, (unsigned long)ptep | 1/*FIXME _PMD_PRESENT*/);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* FIXME - We use the old 2.5.5-rmk1 hack for this.
|
||
|
|
* This is not truly correct, but should be functional.
|
||
|
|
*/
|
||
|
|
#define pte_alloc_one(mm,addr) ((struct page *)pte_alloc_one_kernel(mm,addr))
|
||
|
|
#define pte_free(pte) pte_free_kernel((pte_t *)pte)
|
||
|
|
#define pmd_populate(mm,pmdp,ptep) pmd_populate_kernel(mm,pmdp,(pte_t *)ptep)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Since we have only two-level page tables, these are trivial
|
||
|
|
*
|
||
|
|
* trick __pmd_alloc into optimising away. The actual value is irrelevant though as it
|
||
|
|
* is thrown away. It just cant be zero. -IM
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define pmd_alloc_one(mm,addr) ({ BUG(); ((pmd_t *)2); })
|
||
|
|
#define pmd_free(pmd) do { } while (0)
|
||
|
|
#define pgd_populate(mm,pmd,pte) BUG()
|
||
|
|
|
||
|
|
extern pgd_t *get_pgd_slow(struct mm_struct *mm);
|
||
|
|
extern void free_pgd_slow(pgd_t *pgd);
|
||
|
|
|
||
|
|
#define pgd_alloc(mm) get_pgd_slow(mm)
|
||
|
|
#define pgd_free(pgd) free_pgd_slow(pgd)
|
||
|
|
|
||
|
|
#define check_pgt_cache() do { } while (0)
|
||
|
|
|
||
|
|
#endif
|