LXR linux/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
   5static 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
  13static inline unsigned int hugepd_shift(hugepd_t hpd)
  14{
  15        return hpd_val(hpd) & HUGEPD_SHIFT_MASK;
  16}
  17
  18static 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
  29void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
  30
  31static 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
  37static 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 */
  46