LXR linux/arch/powerpc/include/asm/book3s/64/pgtable-4k.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H
   3#define _ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H
   4/*
   5 * hash 4k can't share hugetlb and also doesn't support THP
   6 */
   7#ifndef __ASSEMBLY__
   8#ifdef CONFIG_HUGETLB_PAGE
   9static inline int pmd_huge(pmd_t pmd)
  10{
  11        /*
  12         * leaf pte for huge page
  13         */
  14        if (radix_enabled())
  15                return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
  16        return 0;
  17}
  18
  19static inline int pud_huge(pud_t pud)
  20{
  21        /*
  22         * leaf pte for huge page
  23         */
  24        if (radix_enabled())
  25                return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
  26        return 0;
  27}
  28
  29static inline int pgd_huge(pgd_t pgd)
  30{
  31        /*
  32         * leaf pte for huge page
  33         */
  34        if (radix_enabled())
  35                return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE));
  36        return 0;
  37}
  38#define pgd_huge pgd_huge
  39/*
  40 * With radix , we have hugepage ptes in the pud and pmd entries. We don't
  41 * need to setup hugepage directory for them. Our pte and page directory format
  42 * enable us to have this enabled.
  43 */
  44static inline int hugepd_ok(hugepd_t hpd)
  45{
  46        if (radix_enabled())
  47                return 0;
  48        return hash__hugepd_ok(hpd);
  49}
  50#define is_hugepd(hpd)          (hugepd_ok(hpd))
  51
  52/*
  53 * 16M and 16G huge page directory tables are allocated from slab cache
  54 *
  55 */
  56#define H_16M_CACHE_INDEX (PAGE_SHIFT + H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE - 24)
  57#define H_16G_CACHE_INDEX                                                      \
  58        (PAGE_SHIFT + H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE + H_PUD_INDEX_SIZE - 34)
  59
  60static inline int get_hugepd_cache_index(int index)
  61{
  62        switch (index) {
  63        case H_16M_CACHE_INDEX:
  64                return HTLB_16M_INDEX;
  65        case H_16G_CACHE_INDEX:
  66                return HTLB_16G_INDEX;
  67        default:
  68                BUG();
  69        }
  70        /* should not reach */
  71}
  72
  73#endif /* CONFIG_HUGETLB_PAGE */
  74
  75#endif /* __ASSEMBLY__ */
  76
  77#endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H */
  78