mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 03:33:59 +08:00
134 lines
2.8 KiB
C
134 lines
2.8 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
|
|
* Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
|
|
*/
|
|
#ifndef _ASM_PGALLOC_H
|
|
#define _ASM_PGALLOC_H
|
|
|
|
#include <linux/highmem.h>
|
|
#include <linux/mm.h>
|
|
|
|
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
|
|
pte_t *pte)
|
|
{
|
|
set_pmd(pmd, __pmd((unsigned long)pte));
|
|
}
|
|
|
|
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
|
|
struct page *pte)
|
|
{
|
|
set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
|
|
}
|
|
|
|
/*
|
|
* Initialize a new pmd table with invalid pointers.
|
|
*/
|
|
extern void pmd_init(unsigned long page, unsigned long pagetable);
|
|
|
|
#ifdef CONFIG_64BIT
|
|
|
|
static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
|
|
{
|
|
set_pud(pud, __pud((unsigned long)pmd));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Initialize a new pgd / pmd table with invalid pointers.
|
|
*/
|
|
extern void pgd_init(unsigned long page);
|
|
|
|
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
|
|
{
|
|
pgd_t *ret, *init;
|
|
|
|
ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
|
|
if (ret) {
|
|
init = pgd_offset(&init_mm, 0);
|
|
pgd_init((unsigned long)ret);
|
|
memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
|
|
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline void pgd_free(pgd_t *pgd)
|
|
{
|
|
free_pages((unsigned long)pgd, PGD_ORDER);
|
|
}
|
|
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
pte_t *pte;
|
|
|
|
pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, PTE_ORDER);
|
|
|
|
return pte;
|
|
}
|
|
|
|
static inline struct page *pte_alloc_one(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
struct page *pte;
|
|
|
|
pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
|
|
if (pte)
|
|
clear_highpage(pte);
|
|
|
|
return pte;
|
|
}
|
|
|
|
static inline void pte_free_kernel(pte_t *pte)
|
|
{
|
|
free_pages((unsigned long)pte, PTE_ORDER);
|
|
}
|
|
|
|
static inline void pte_free(struct page *pte)
|
|
{
|
|
__free_pages(pte, PTE_ORDER);
|
|
}
|
|
|
|
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
|
|
|
|
#ifdef CONFIG_32BIT
|
|
|
|
/*
|
|
* 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_free(x) do { } while (0)
|
|
#define __pmd_free_tlb(tlb,x) do { } while (0)
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_64BIT
|
|
|
|
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
|
|
{
|
|
pmd_t *pmd;
|
|
|
|
pmd = (pmd_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT, PMD_ORDER);
|
|
if (pmd)
|
|
pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
|
|
return pmd;
|
|
}
|
|
|
|
static inline void pmd_free(pmd_t *pmd)
|
|
{
|
|
free_pages((unsigned long)pmd, PMD_ORDER);
|
|
}
|
|
|
|
#define __pmd_free_tlb(tlb,x) pmd_free(x)
|
|
|
|
#endif
|
|
|
|
#define check_pgt_cache() do { } while (0)
|
|
|
|
#endif /* _ASM_PGALLOC_H */
|