arch/powerpc/include/asm/nohash/hugetlb-book3e.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_NOHASH_HUGETLB_BOOK3E_H
   3 #define _ASM_POWERPC_NOHASH_HUGETLB_BOOK3E_H
   4
   5 static inline pte_t *hugepd_page(hugepd_t hpd)
   6 {
   7         if (WARN_ON(!hugepd_ok(hpd)))
   8                 return NULL;
   9
  10         return (pte_t *)((hpd_val(hpd) & ~HUGEPD_SHIFT_MASK) | PD_HUGE);
  11 }
  12
  13 static inline unsigned int hugepd_shift(hugepd_t hpd)
  14 {
  15         return hpd_val(hpd) & HUGEPD_SHIFT_MASK;
  16 }
  17
  18 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
  19                                     unsigned int pdshift)
  20 {
  21         /*
  22          * On FSL BookE, we have multiple higher-level table entries that
  23          * point to the same hugepte.  Just use the first one since they're all
  24          * identical.  So for that case, idx=0.
  25          */
  26         return hugepd_page(hpd);
  27 }
  28
  29 void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
  30
  31 static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift)
  32 {
  33         /* We use the old format for PPC_FSL_BOOK3E */
  34         *hpdp = __hugepd(((unsigned long)new & ~PD_HUGE) | pshift);
  35 }
  36
  37 static inline int check_and_get_huge_psize(int shift)
  38 {
  39         if (shift & 1)  /* Not a power of 4 */
  40                 return -EINVAL;
  41
  42         return shift_to_mmu_psize(shift);
  43 }
  44
  45 #endif /* _ASM_POWERPC_NOHASH_HUGETLB_BOOK3E_H */