mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-27 13:05:03 +08:00
126 lines
2.9 KiB
C
126 lines
2.9 KiB
C
#ifndef __ASM_SH64_PGALLOC_H
|
|
#define __ASM_SH64_PGALLOC_H
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
* include/asm-sh64/pgalloc.h
|
|
*
|
|
* Copyright (C) 2000, 2001 Paolo Alberelli
|
|
* Copyright (C) 2003, 2004 Paul Mundt
|
|
* Copyright (C) 2003, 2004 Richard Curnow
|
|
*
|
|
*/
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/quicklist.h>
|
|
#include <asm/page.h>
|
|
|
|
static inline void pgd_init(unsigned long page)
|
|
{
|
|
unsigned long *pgd = (unsigned long *)page;
|
|
extern pte_t empty_bad_pte_table[PTRS_PER_PTE];
|
|
int i;
|
|
|
|
for (i = 0; i < USER_PTRS_PER_PGD; i++)
|
|
pgd[i] = (unsigned long)empty_bad_pte_table;
|
|
}
|
|
|
|
/*
|
|
* Allocate and free page tables. The xxx_kernel() versions are
|
|
* used to allocate a kernel page table - this turns on ASN bits
|
|
* if any.
|
|
*/
|
|
|
|
static inline pgd_t *get_pgd_slow(void)
|
|
{
|
|
unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
|
|
pgd_t *ret = kmalloc(pgd_size, GFP_KERNEL);
|
|
return ret;
|
|
}
|
|
|
|
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
|
|
{
|
|
return quicklist_alloc(0, GFP_KERNEL, NULL);
|
|
}
|
|
|
|
static inline void pgd_free(pgd_t *pgd)
|
|
{
|
|
quicklist_free(0, NULL, pgd);
|
|
}
|
|
|
|
static inline struct page *pte_alloc_one(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
void *pg = quicklist_alloc(0, GFP_KERNEL, NULL);
|
|
return pg ? virt_to_page(pg) : NULL;
|
|
}
|
|
|
|
static inline void pte_free_kernel(pte_t *pte)
|
|
{
|
|
quicklist_free(0, NULL, pte);
|
|
}
|
|
|
|
static inline void pte_free(struct page *pte)
|
|
{
|
|
quicklist_free_page(0, NULL, pte);
|
|
}
|
|
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
return quicklist_alloc(0, GFP_KERNEL, NULL);
|
|
}
|
|
|
|
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
|
|
|
|
/*
|
|
* allocating and freeing a pmd is trivial: the 1-entry pmd is
|
|
* inside the pgd, so has no extra memory associated with it.
|
|
*/
|
|
|
|
#if defined(CONFIG_SH64_PGTABLE_2_LEVEL)
|
|
|
|
#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
|
|
#define pmd_free(x) do { } while (0)
|
|
#define pgd_populate(mm, pmd, pte) BUG()
|
|
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
|
|
#define __pmd_free_tlb(tlb,pmd) do { } while (0)
|
|
|
|
#elif defined(CONFIG_SH64_PGTABLE_3_LEVEL)
|
|
|
|
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
|
|
{
|
|
return quicklist_alloc(0, GFP_KERNEL, NULL);
|
|
}
|
|
|
|
static inline void pmd_free(pmd_t *pmd)
|
|
{
|
|
quicklist_free(0, NULL, pmd);
|
|
}
|
|
|
|
#define pgd_populate(mm, pgd, pmd) pgd_set(pgd, pmd)
|
|
#define __pmd_free_tlb(tlb,pmd) pmd_free(pmd)
|
|
|
|
#else
|
|
#error "No defined page table size"
|
|
#endif
|
|
|
|
#define pmd_populate_kernel(mm, pmd, pte) \
|
|
set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) (pte)))
|
|
|
|
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
|
|
struct page *pte)
|
|
{
|
|
set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) page_address (pte)));
|
|
}
|
|
|
|
static inline void check_pgt_cache(void)
|
|
{
|
|
quicklist_trim(0, NULL, 25, 16);
|
|
}
|
|
|
|
#endif /* __ASM_SH64_PGALLOC_H */
|