arch/score/include/asm/pgalloc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_SCORE_PGALLOC_H
   3 #define _ASM_SCORE_PGALLOC_H
   4
   5 #include <linux/mm.h>
   6 #include <linux/highmem.h>
   7 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
   8         pte_t *pte)
   9 {
  10         set_pmd(pmd, __pmd((unsigned long)pte));
  11 }
  12
  13 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
  14         pgtable_t pte)
  15 {
  16         set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
  17 }
  18
  19 #define pmd_pgtable(pmd)        pmd_page(pmd)
  20
  21 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
  22 {
  23         pgd_t *ret, *init;
  24
  25         ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
  26         if (ret) {
  27                 init = pgd_offset(&init_mm, 0UL);
  28                 pgd_init((unsigned long)ret);
  29                 memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
  30                 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
  31         }
  32
  33         return ret;
  34 }
  35
  36 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  37 {
  38         free_pages((unsigned long)pgd, PGD_ORDER);
  39 }
  40
  41 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  42         unsigned long address)
  43 {
  44         pte_t *pte;
  45
  46         pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_ZERO, PTE_ORDER);
  47
  48         return pte;
  49 }
  50
  51 static inline struct page *pte_alloc_one(struct mm_struct *mm,
  52         unsigned long address)
  53 {
  54         struct page *pte;
  55
  56         pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
  57         if (!pte)
  58                 return NULL;
  59         clear_highpage(pte);
  60         if (!pgtable_page_ctor(pte)) {
  61                 __free_page(pte);
  62                 return NULL;
  63         }
  64         return pte;
  65 }
  66
  67 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  68 {
  69         free_pages((unsigned long)pte, PTE_ORDER);
  70 }
  71
  72 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
  73 {
  74         pgtable_page_dtor(pte);
  75         __free_pages(pte, PTE_ORDER);
  76 }
  77
  78 #define __pte_free_tlb(tlb, pte, buf)                   \
  79 do {                                                    \
  80         pgtable_page_dtor(pte);                         \
  81         tlb_remove_page((tlb), pte);                    \
  82 } while (0)
  83
  84 #define check_pgt_cache()               do {} while (0)
  85
  86 #endif /* _ASM_SCORE_PGALLOC_H */