arch/powerpc/include/asm/nohash/32/hugetlb-8xx.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H
   3 #define _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H
   4
   5 #define PAGE_SHIFT_8M           23
   6
   7 static inline pte_t *hugepd_page(hugepd_t hpd)
   8 {
   9         BUG_ON(!hugepd_ok(hpd));
  10
  11         return (pte_t *)__va(hpd_val(hpd) & ~HUGEPD_SHIFT_MASK);
  12 }
  13
  14 static inline unsigned int hugepd_shift(hugepd_t hpd)
  15 {
  16         return PAGE_SHIFT_8M;
  17 }
  18
  19 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
  20                                     unsigned int pdshift)
  21 {
  22         unsigned long idx = (addr & (SZ_4M - 1)) >> PAGE_SHIFT;
  23
  24         return hugepd_page(hpd) + idx;
  25 }
  26
  27 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
  28                                       unsigned long vmaddr)
  29 {
  30         flush_tlb_page(vma, vmaddr);
  31 }
  32
  33 static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift)
  34 {
  35         *hpdp = __hugepd(__pa(new) | _PMD_USER | _PMD_PRESENT | _PMD_PAGE_8M);
  36 }
  37
  38 static inline void hugepd_populate_kernel(hugepd_t *hpdp, pte_t *new, unsigned int pshift)
  39 {
  40         *hpdp = __hugepd(__pa(new) | _PMD_PRESENT | _PMD_PAGE_8M);
  41 }
  42
  43 static inline int check_and_get_huge_psize(int shift)
  44 {
  45         return shift_to_mmu_psize(shift);
  46 }
  47
  48 #define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
  49 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte);
  50
  51 #define __HAVE_ARCH_HUGE_PTE_CLEAR
  52 static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
  53                                   pte_t *ptep, unsigned long sz)
  54 {
  55         pte_update(mm, addr, ptep, ~0UL, 0, 1);
  56 }
  57
  58 #define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
  59 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  60                                            unsigned long addr, pte_t *ptep)
  61 {
  62         unsigned long clr = ~pte_val(pte_wrprotect(__pte(~0)));
  63         unsigned long set = pte_val(pte_wrprotect(__pte(0)));
  64
  65         pte_update(mm, addr, ptep, clr, set, 1);
  66 }
  67
  68 #ifdef CONFIG_PPC_4K_PAGES
  69 static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
  70                                        struct page *page, int writable)
  71 {
  72         size_t size = huge_page_size(hstate_vma(vma));
  73
  74         if (size == SZ_16K)
  75                 return __pte(pte_val(entry) & ~_PAGE_HUGE);
  76         else
  77                 return entry;
  78 }
  79 #define arch_make_huge_pte arch_make_huge_pte
  80 #endif
  81
  82 #endif /* _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H */