211 lines
5.6 KiB
C
211 lines
5.6 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/slab.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/percpu.h>
|
|
|
|
struct vmemmap_backing {
|
|
struct vmemmap_backing *list;
|
|
unsigned long phys;
|
|
unsigned long virt_addr;
|
|
};
|
|
extern struct vmemmap_backing *vmemmap_list;
|
|
|
|
/*
|
|
* Functions that deal with pagetables that could be at any level of
|
|
* the table need to be passed an "index_size" so they know how to
|
|
* handle allocation. For PTE pages (which are linked to a struct
|
|
* page for now, and drawn from the main get_free_pages() pool), the
|
|
* allocation size will be (2^index_size * sizeof(pointer)) and
|
|
* allocations are drawn from the kmem_cache in PGT_CACHE(index_size).
|
|
*
|
|
* The maximum index size needs to be big enough to allow any
|
|
* pagetable sizes we need, but small enough to fit in the low bits of
|
|
* any page table pointer. In other words all pagetables, even tiny
|
|
* ones, must be aligned to allow at least enough low 0 bits to
|
|
* contain this value. This value is also used as a mask, so it must
|
|
* be one less than a power of two.
|
|
*/
|
|
#define MAX_PGTABLE_INDEX_SIZE 0xf
|
|
|
|
extern struct kmem_cache *pgtable_cache[];
|
|
#define PGT_CACHE(shift) ({ \
|
|
BUG_ON(!(shift)); \
|
|
pgtable_cache[(shift) - 1]; \
|
|
})
|
|
|
|
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
|
|
{
|
|
return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), GFP_KERNEL);
|
|
}
|
|
|
|
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
|
|
{
|
|
kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
|
|
}
|
|
|
|
#ifndef CONFIG_PPC_64K_PAGES
|
|
|
|
#define pgd_populate(MM, PGD, PUD) pgd_set(PGD, (unsigned long)PUD)
|
|
|
|
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
|
|
{
|
|
return kmem_cache_alloc(PGT_CACHE(PUD_INDEX_SIZE), GFP_KERNEL);
|
|
}
|
|
|
|
static inline void pud_free(struct mm_struct *mm, pud_t *pud)
|
|
{
|
|
kmem_cache_free(PGT_CACHE(PUD_INDEX_SIZE), pud);
|
|
}
|
|
|
|
static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *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);
|
|
}
|
|
|
|
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
|
|
pgtable_t pte_page)
|
|
{
|
|
pmd_set(pmd, (unsigned long)page_address(pte_page));
|
|
}
|
|
|
|
#define pmd_pgtable(pmd) pmd_page(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_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);
|
|
if (!pgtable_page_ctor(page)) {
|
|
__free_page(page);
|
|
return NULL;
|
|
}
|
|
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);
|
|
}
|
|
|
|
extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift);
|
|
#ifdef CONFIG_SMP
|
|
extern void __tlb_remove_table(void *_table);
|
|
#endif
|
|
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
|
|
unsigned long address)
|
|
{
|
|
tlb_flush_pgtable(tlb, address);
|
|
pgtable_free_tlb(tlb, page_address(table), 0);
|
|
}
|
|
|
|
#else /* if CONFIG_PPC_64K_PAGES */
|
|
|
|
extern pte_t *pte_fragment_alloc(struct mm_struct *, unsigned long, int);
|
|
extern void pte_fragment_free(unsigned long *, int);
|
|
extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift);
|
|
#ifdef CONFIG_SMP
|
|
extern void __tlb_remove_table(void *_table);
|
|
#endif
|
|
|
|
#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);
|
|
}
|
|
|
|
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
|
|
pgtable_t pte_page)
|
|
{
|
|
pmd_set(pmd, (unsigned long)pte_page);
|
|
}
|
|
|
|
static inline pgtable_t pmd_pgtable(pmd_t pmd)
|
|
{
|
|
return (pgtable_t)(pmd_val(pmd) & ~PMD_MASKED_BITS);
|
|
}
|
|
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
return (pte_t *)pte_fragment_alloc(mm, address, 1);
|
|
}
|
|
|
|
static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
return (pgtable_t)pte_fragment_alloc(mm, address, 0);
|
|
}
|
|
|
|
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
|
|
{
|
|
pte_fragment_free((unsigned long *)pte, 1);
|
|
}
|
|
|
|
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
|
|
{
|
|
pte_fragment_free((unsigned long *)ptepage, 0);
|
|
}
|
|
|
|
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
|
|
unsigned long address)
|
|
{
|
|
tlb_flush_pgtable(tlb, address);
|
|
pgtable_free_tlb(tlb, table, 0);
|
|
}
|
|
#endif /* CONFIG_PPC_64K_PAGES */
|
|
|
|
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
|
|
{
|
|
return kmem_cache_alloc(PGT_CACHE(PMD_CACHE_INDEX), GFP_KERNEL);
|
|
}
|
|
|
|
static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
|
|
{
|
|
kmem_cache_free(PGT_CACHE(PMD_CACHE_INDEX), pmd);
|
|
}
|
|
|
|
#define __pmd_free_tlb(tlb, pmd, addr) \
|
|
pgtable_free_tlb(tlb, pmd, PMD_CACHE_INDEX)
|
|
#ifndef CONFIG_PPC_64K_PAGES
|
|
#define __pud_free_tlb(tlb, pud, addr) \
|
|
pgtable_free_tlb(tlb, pud, PUD_INDEX_SIZE)
|
|
|
|
#endif /* CONFIG_PPC_64K_PAGES */
|
|
|
|
#define check_pgt_cache() do { } while (0)
|
|
|
|
#endif /* _ASM_POWERPC_PGALLOC_64_H */
|