mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-23 19:14:30 +08:00
d614bb0412
Acked-by: Paul Mackerras <paulus@samba.org> This patch moves the common code to 32/64 bit headers and also duplicate 4K_PAGES and 64K_PAGES section. We will later change the 64 bit 64K_PAGES version to support smaller PTE fragments. The patch doesn't introduce any functional changes. Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
#ifndef _ASM_POWERPC_PGALLOC_32_H
|
|
#define _ASM_POWERPC_PGALLOC_32_H
|
|
|
|
#include <linux/threads.h>
|
|
|
|
/* For 32-bit, all levels of page tables are just drawn from get_free_page() */
|
|
#define MAX_PGTABLE_INDEX_SIZE 0
|
|
|
|
extern void __bad_pte(pmd_t *pmd);
|
|
|
|
extern pgd_t *pgd_alloc(struct mm_struct *mm);
|
|
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
|
|
|
|
/*
|
|
* We don't have any real pmd's, and this code never triggers because
|
|
* the pgd will always be present..
|
|
*/
|
|
/* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */
|
|
#define pmd_free(mm, x) do { } while (0)
|
|
#define __pmd_free_tlb(tlb,x,a) do { } while (0)
|
|
/* #define pgd_populate(mm, pmd, pte) BUG() */
|
|
|
|
#ifndef CONFIG_BOOKE
|
|
#define pmd_populate_kernel(mm, pmd, pte) \
|
|
(pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT)
|
|
#define pmd_populate(mm, pmd, pte) \
|
|
(pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT)
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
#else
|
|
#define pmd_populate_kernel(mm, pmd, pte) \
|
|
(pmd_val(*(pmd)) = (unsigned long)pte | _PMD_PRESENT)
|
|
#define pmd_populate(mm, pmd, pte) \
|
|
(pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
#endif
|
|
|
|
extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
|
|
extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
|
|
|
|
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
|
|
{
|
|
free_page((unsigned long)pte);
|
|
}
|
|
|
|
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
|
|
{
|
|
pgtable_page_dtor(ptepage);
|
|
__free_page(ptepage);
|
|
}
|
|
|
|
static inline void pgtable_free(void *table, unsigned index_size)
|
|
{
|
|
BUG_ON(index_size); /* 32-bit doesn't use this */
|
|
free_page((unsigned long)table);
|
|
}
|
|
|
|
#define check_pgt_cache() do { } while (0)
|
|
|
|
#ifdef CONFIG_SMP
|
|
static inline void pgtable_free_tlb(struct mmu_gather *tlb,
|
|
void *table, int shift)
|
|
{
|
|
unsigned long pgf = (unsigned long)table;
|
|
BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
|
|
pgf |= shift;
|
|
tlb_remove_table(tlb, (void *)pgf);
|
|
}
|
|
|
|
static inline void __tlb_remove_table(void *_table)
|
|
{
|
|
void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
|
|
unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
|
|
|
|
pgtable_free(table, shift);
|
|
}
|
|
#else
|
|
static inline void pgtable_free_tlb(struct mmu_gather *tlb,
|
|
void *table, int shift)
|
|
{
|
|
pgtable_free(table, shift);
|
|
}
|
|
#endif
|
|
|
|
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
|
|
unsigned long address)
|
|
{
|
|
struct page *page = page_address(table);
|
|
|
|
tlb_flush_pgtable(tlb, address);
|
|
pgtable_page_dtor(page);
|
|
pgtable_free_tlb(tlb, page, 0);
|
|
}
|
|
#endif /* _ASM_POWERPC_PGALLOC_32_H */
|