111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
|
/*
|
||
|
|
* linux/arch/unicore32/include/asm/pgalloc.h
|
||
|
|
*
|
||
|
|
* Code specific to PKUnity SoC and UniCore ISA
|
||
|
|
*
|
||
|
|
* Copyright (C) 2001-2010 GUAN Xue-tao
|
||
|
|
*
|
||
|
|
* 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 __UNICORE_PGALLOC_H__
|
||
|
|
#define __UNICORE_PGALLOC_H__
|
||
|
|
|
||
|
|
#include <asm/pgtable-hwdef.h>
|
||
|
|
#include <asm/processor.h>
|
||
|
|
#include <asm/cacheflush.h>
|
||
|
|
#include <asm/tlbflush.h>
|
||
|
|
|
||
|
|
#define check_pgt_cache() do { } while (0)
|
||
|
|
|
||
|
|
#define _PAGE_USER_TABLE (PMD_TYPE_TABLE | PMD_PRESENT)
|
||
|
|
#define _PAGE_KERNEL_TABLE (PMD_TYPE_TABLE | PMD_PRESENT)
|
||
|
|
|
||
|
|
extern pgd_t *get_pgd_slow(struct mm_struct *mm);
|
||
|
|
extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd);
|
||
|
|
|
||
|
|
#define pgd_alloc(mm) get_pgd_slow(mm)
|
||
|
|
#define pgd_free(mm, pgd) free_pgd_slow(mm, pgd)
|
||
|
|
|
||
|
|
#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Allocate one PTE table.
|
||
|
|
*/
|
||
|
|
static inline pte_t *
|
||
|
|
pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr)
|
||
|
|
{
|
||
|
|
pte_t *pte;
|
||
|
|
|
||
|
|
pte = (pte_t *)__get_free_page(PGALLOC_GFP);
|
||
|
|
if (pte)
|
||
|
|
clean_dcache_area(pte, PTRS_PER_PTE * sizeof(pte_t));
|
||
|
|
|
||
|
|
return pte;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline pgtable_t
|
||
|
|
pte_alloc_one(struct mm_struct *mm, unsigned long addr)
|
||
|
|
{
|
||
|
|
struct page *pte;
|
||
|
|
|
||
|
|
pte = alloc_pages(PGALLOC_GFP, 0);
|
||
|
|
if (pte) {
|
||
|
|
if (!PageHighMem(pte)) {
|
||
|
|
void *page = page_address(pte);
|
||
|
|
clean_dcache_area(page, PTRS_PER_PTE * sizeof(pte_t));
|
||
|
|
}
|
||
|
|
pgtable_page_ctor(pte);
|
||
|
|
}
|
||
|
|
|
||
|
|
return pte;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Free one PTE table.
|
||
|
|
*/
|
||
|
|
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
|
||
|
|
{
|
||
|
|
if (pte)
|
||
|
|
free_page((unsigned long)pte);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
|
||
|
|
{
|
||
|
|
pgtable_page_dtor(pte);
|
||
|
|
__free_page(pte);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval)
|
||
|
|
{
|
||
|
|
set_pmd(pmdp, __pmd(pmdval));
|
||
|
|
flush_pmd_entry(pmdp);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Populate the pmdp entry with a pointer to the pte. This pmd is part
|
||
|
|
* of the mm address space.
|
||
|
|
*/
|
||
|
|
static inline void
|
||
|
|
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
|
||
|
|
{
|
||
|
|
unsigned long pte_ptr = (unsigned long)ptep;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The pmd must be loaded with the physical
|
||
|
|
* address of the PTE table
|
||
|
|
*/
|
||
|
|
__pmd_populate(pmdp, __pa(pte_ptr) | _PAGE_KERNEL_TABLE);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep)
|
||
|
|
{
|
||
|
|
__pmd_populate(pmdp,
|
||
|
|
page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE);
|
||
|
|
}
|
||
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
||
|
|
|
||
|
|
#endif
|