include/asm-ppc64/pgalloc.h

   1 #ifndef _PPC64_PGALLOC_H
   2 #define _PPC64_PGALLOC_H
   3
   4 #include <linux/mm.h>
   5 #include <linux/slab.h>
   6 #include <linux/cpumask.h>
   7 #include <linux/percpu.h>
   8
   9 extern kmem_cache_t *zero_cache;
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version
  15  * 2 of the License, or (at your option) any later version.
  16  */
  17
  18 static inline pgd_t *
  19 pgd_alloc(struct mm_struct *mm)
  20 {
  21         return kmem_cache_alloc(zero_cache, GFP_KERNEL);
  22 }
  23
  24 static inline void
  25 pgd_free(pgd_t *pgd)
  26 {
  27         kmem_cache_free(zero_cache, pgd);
  28 }
  29
  30 #define pgd_populate(MM, PGD, PMD)      pgd_set(PGD, PMD)
  31
  32 static inline pmd_t *
  33 pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
  34 {
  35         return kmem_cache_alloc(zero_cache, GFP_KERNEL|__GFP_REPEAT);
  36 }
  37
  38 static inline void
  39 pmd_free(pmd_t *pmd)
  40 {
  41         kmem_cache_free(zero_cache, pmd);
  42 }
  43
  44 #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, pte)
  45 #define pmd_populate(mm, pmd, pte_page) \
  46         pmd_populate_kernel(mm, pmd, page_address(pte_page))
  47
  48 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
  49 {
  50         return kmem_cache_alloc(zero_cache, GFP_KERNEL|__GFP_REPEAT);
  51 }
  52
  53 static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
  54 {
  55         pte_t *pte = kmem_cache_alloc(zero_cache, GFP_KERNEL|__GFP_REPEAT);
  56         if (pte)
  57                 return virt_to_page(pte);
  58         return NULL;
  59 }
  60
  61 static inline void pte_free_kernel(pte_t *pte)
  62 {
  63         kmem_cache_free(zero_cache, pte);
  64 }
  65
  66 static inline void pte_free(struct page *ptepage)
  67 {
  68         kmem_cache_free(zero_cache, page_address(ptepage));
  69 }
  70
  71 struct pte_freelist_batch
  72 {
  73         struct rcu_head rcu;
  74         unsigned int    index;
  75         struct page *   pages[0];
  76 };
  77
  78 #define PTE_FREELIST_SIZE       ((PAGE_SIZE - sizeof(struct pte_freelist_batch)) / \
  79                                   sizeof(struct page *))
  80
  81 extern void pte_free_now(struct page *ptepage);
  82 extern void pte_free_submit(struct pte_freelist_batch *batch);
  83
  84 DECLARE_PER_CPU(struct pte_freelist_batch *, pte_freelist_cur);
  85
  86 void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage);
  87 #define __pmd_free_tlb(tlb, pmd)        __pte_free_tlb(tlb, virt_to_page(pmd))
  88
  89 #define check_pgt_cache()       do { } while (0)
  90
  91 #endif /* _PPC64_PGALLOC_H */