114 lines
3.0 KiB
C
114 lines
3.0 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_BOOK3S_64_HASH_4K_H
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#define _ASM_POWERPC_BOOK3S_64_HASH_4K_H
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/*
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* Entries per page directory level. The PTE level must use a 64b record
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* for each page table entry. The PMD and PGD level use a 32b record for
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* each entry by assuming that each entry is page aligned.
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*/
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#define H_PTE_INDEX_SIZE 9
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#define H_PMD_INDEX_SIZE 7
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#define H_PUD_INDEX_SIZE 9
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#define H_PGD_INDEX_SIZE 9
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#ifndef __ASSEMBLY__
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#define H_PTE_TABLE_SIZE (sizeof(pte_t) << H_PTE_INDEX_SIZE)
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#define H_PMD_TABLE_SIZE (sizeof(pmd_t) << H_PMD_INDEX_SIZE)
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#define H_PUD_TABLE_SIZE (sizeof(pud_t) << H_PUD_INDEX_SIZE)
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#define H_PGD_TABLE_SIZE (sizeof(pgd_t) << H_PGD_INDEX_SIZE)
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/* PTE flags to conserve for HPTE identification */
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#define _PAGE_HPTEFLAGS (H_PAGE_BUSY | H_PAGE_HASHPTE | \
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H_PAGE_F_SECOND | H_PAGE_F_GIX)
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/*
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* Not supported by 4k linux page size
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*/
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#define H_PAGE_4K_PFN 0x0
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#define H_PAGE_THP_HUGE 0x0
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#define H_PAGE_COMBO 0x0
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#define H_PTE_FRAG_NR 0
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#define H_PTE_FRAG_SIZE_SHIFT 0
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/*
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* On all 4K setups, remap_4k_pfn() equates to remap_pfn_range()
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*/
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#define remap_4k_pfn(vma, addr, pfn, prot) \
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remap_pfn_range((vma), (addr), (pfn), PAGE_SIZE, (prot))
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#ifdef CONFIG_HUGETLB_PAGE
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static inline int hash__hugepd_ok(hugepd_t hpd)
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{
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unsigned long hpdval = hpd_val(hpd);
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/*
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* if it is not a pte and have hugepd shift mask
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* set, then it is a hugepd directory pointer
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*/
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if (!(hpdval & _PAGE_PTE) &&
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((hpdval & HUGEPD_SHIFT_MASK) != 0))
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return true;
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return false;
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}
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#endif
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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static inline char *get_hpte_slot_array(pmd_t *pmdp)
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{
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BUG();
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return NULL;
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}
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static inline unsigned int hpte_valid(unsigned char *hpte_slot_array, int index)
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{
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BUG();
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return 0;
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}
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static inline unsigned int hpte_hash_index(unsigned char *hpte_slot_array,
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int index)
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{
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BUG();
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return 0;
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}
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static inline void mark_hpte_slot_valid(unsigned char *hpte_slot_array,
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unsigned int index, unsigned int hidx)
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{
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BUG();
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}
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static inline int hash__pmd_trans_huge(pmd_t pmd)
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{
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return 0;
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}
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static inline int hash__pmd_same(pmd_t pmd_a, pmd_t pmd_b)
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{
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BUG();
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return 0;
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}
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static inline pmd_t hash__pmd_mkhuge(pmd_t pmd)
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{
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BUG();
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return pmd;
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}
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extern unsigned long hash__pmd_hugepage_update(struct mm_struct *mm,
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unsigned long addr, pmd_t *pmdp,
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unsigned long clr, unsigned long set);
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extern pmd_t hash__pmdp_collapse_flush(struct vm_area_struct *vma,
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unsigned long address, pmd_t *pmdp);
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extern void hash__pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
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pgtable_t pgtable);
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extern pgtable_t hash__pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
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extern void hash__pmdp_huge_split_prepare(struct vm_area_struct *vma,
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unsigned long address, pmd_t *pmdp);
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extern pmd_t hash__pmdp_huge_get_and_clear(struct mm_struct *mm,
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unsigned long addr, pmd_t *pmdp);
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extern int hash__has_transparent_hugepage(void);
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#endif
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_POWERPC_BOOK3S_64_HASH_4K_H */
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