167 строки
4.2 KiB
C
167 строки
4.2 KiB
C
#ifndef _ASM_POWERPC_PGALLOC_64_H
|
|
#define _ASM_POWERPC_PGALLOC_64_H
|
|
/*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/percpu.h>
|
|
|
|
#ifndef CONFIG_PPC_SUBPAGE_PROT
|
|
static inline void subpage_prot_free(pgd_t *pgd) {}
|
|
#endif
|
|
|
|
extern struct kmem_cache *pgtable_cache[];
|
|
|
|
#define PGD_CACHE_NUM 0
|
|
#define PUD_CACHE_NUM 1
|
|
#define PMD_CACHE_NUM 1
|
|
#define HUGEPTE_CACHE_NUM 2
|
|
#define PTE_NONCACHE_NUM 7 /* from GFP rather than kmem_cache */
|
|
|
|
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
|
|
{
|
|
return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
|
|
}
|
|
|
|
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
|
|
{
|
|
subpage_prot_free(pgd);
|
|
kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd);
|
|
}
|
|
|
|
#ifndef CONFIG_PPC_64K_PAGES
|
|
|
|
#define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD)
|
|
|
|
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
|
|
{
|
|
return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM],
|
|
GFP_KERNEL|__GFP_REPEAT);
|
|
}
|
|
|
|
static inline void pud_free(struct mm_struct *mm, pud_t *pud)
|
|
{
|
|
kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
|
|
}
|
|
|
|
static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
|
|
{
|
|
pud_set(pud, (unsigned long)pmd);
|
|
}
|
|
|
|
#define pmd_populate(mm, pmd, pte_page) \
|
|
pmd_populate_kernel(mm, pmd, page_address(pte_page))
|
|
#define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
|
|
|
|
#else /* CONFIG_PPC_64K_PAGES */
|
|
|
|
#define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd)
|
|
|
|
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
|
|
pte_t *pte)
|
|
{
|
|
pmd_set(pmd, (unsigned long)pte);
|
|
}
|
|
|
|
#define pmd_populate(mm, pmd, pte_page) \
|
|
pmd_populate_kernel(mm, pmd, page_address(pte_page))
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
|
|
#endif /* CONFIG_PPC_64K_PAGES */
|
|
|
|
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
|
|
{
|
|
return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM],
|
|
GFP_KERNEL|__GFP_REPEAT);
|
|
}
|
|
|
|
static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
|
|
{
|
|
kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
|
|
}
|
|
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
|
|
}
|
|
|
|
static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
struct page *page;
|
|
pte_t *pte;
|
|
|
|
pte = pte_alloc_one_kernel(mm, address);
|
|
if (!pte)
|
|
return NULL;
|
|
page = virt_to_page(pte);
|
|
pgtable_page_ctor(page);
|
|
return page;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
#define PGF_CACHENUM_MASK 0x7
|
|
|
|
typedef struct pgtable_free {
|
|
unsigned long val;
|
|
} pgtable_free_t;
|
|
|
|
static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
|
|
unsigned long mask)
|
|
{
|
|
BUG_ON(cachenum > PGF_CACHENUM_MASK);
|
|
|
|
return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
|
|
}
|
|
|
|
static inline void pgtable_free(pgtable_free_t pgf)
|
|
{
|
|
void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
|
|
int cachenum = pgf.val & PGF_CACHENUM_MASK;
|
|
|
|
if (cachenum == PTE_NONCACHE_NUM)
|
|
free_page((unsigned long)p);
|
|
else
|
|
kmem_cache_free(pgtable_cache[cachenum], p);
|
|
}
|
|
|
|
extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
|
|
|
|
#define __pte_free_tlb(tlb,ptepage) \
|
|
do { \
|
|
pgtable_page_dtor(ptepage); \
|
|
pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
|
|
PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1)); \
|
|
} while (0)
|
|
#define __pmd_free_tlb(tlb, pmd) \
|
|
pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
|
|
PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
|
|
#ifndef CONFIG_PPC_64K_PAGES
|
|
#define __pud_free_tlb(tlb, pud) \
|
|
pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
|
|
PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
|
|
#endif /* CONFIG_PPC_64K_PAGES */
|
|
|
|
#define check_pgt_cache() do { } while (0)
|
|
|
|
#endif /* _ASM_POWERPC_PGALLOC_64_H */
|