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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_NOHASH_64_PGTABLE_4K_H
#define _ASM_POWERPC_NOHASH_64_PGTABLE_4K_H
#include <asm-generic/5level-fixup.h>
/*
* Entries per page directory level. The PTE level must use a 64b record
* for each page table entry. The PMD and PGD level use a 32b record for
* each entry by assuming that each entry is page aligned.
*/
#define PTE_INDEX_SIZE 9
#define PMD_INDEX_SIZE 7
#define PUD_INDEX_SIZE 9
#define PGD_INDEX_SIZE 9
#ifndef __ASSEMBLY__
#define PTE_TABLE_SIZE (sizeof(pte_t) << PTE_INDEX_SIZE)
#define PMD_TABLE_SIZE (sizeof(pmd_t) << PMD_INDEX_SIZE)
#define PUD_TABLE_SIZE (sizeof(pud_t) << PUD_INDEX_SIZE)
#define PGD_TABLE_SIZE (sizeof(pgd_t) << PGD_INDEX_SIZE)
#endif /* __ASSEMBLY__ */
#define PTRS_PER_PTE (1 << PTE_INDEX_SIZE)
#define PTRS_PER_PMD (1 << PMD_INDEX_SIZE)
#define PTRS_PER_PUD (1 << PUD_INDEX_SIZE)
#define PTRS_PER_PGD (1 << PGD_INDEX_SIZE)
/* PMD_SHIFT determines what a second-level page table entry can map */
#define PMD_SHIFT (PAGE_SHIFT + PTE_INDEX_SIZE)
#define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))
/* PUD_SHIFT determines what a third-level page table entry can map */
#define PUD_SHIFT (PMD_SHIFT + PMD_INDEX_SIZE)
#define PUD_SIZE (1UL << PUD_SHIFT)
#define PUD_MASK (~(PUD_SIZE-1))
/* PGDIR_SHIFT determines what a fourth-level page table entry can map */
#define PGDIR_SHIFT (PUD_SHIFT + PUD_INDEX_SIZE)
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
/* Bits to mask out from a PMD to get to the PTE page */
#define PMD_MASKED_BITS 0
/* Bits to mask out from a PUD to get to the PMD page */
#define PUD_MASKED_BITS 0
/* Bits to mask out from a PGD to get to the PUD page */
#define PGD_MASKED_BITS 0
/*
* 4-level page tables related bits
*/
#define pgd_none(pgd) (!pgd_val(pgd))
#define pgd_bad(pgd) (pgd_val(pgd) == 0)
#define pgd_present(pgd) (pgd_val(pgd) != 0)
#define pgd_page_vaddr(pgd) (pgd_val(pgd) & ~PGD_MASKED_BITS)
#ifndef __ASSEMBLY__
static inline void pgd_clear(pgd_t *pgdp)
{
*pgdp = __pgd(0);
}
static inline pte_t pgd_pte(pgd_t pgd)
{
return __pte(pgd_val(pgd));
}
static inline pgd_t pte_pgd(pte_t pte)
{
return __pgd(pte_val(pte));
}
extern struct page *pgd_page(pgd_t pgd);
#endif /* !__ASSEMBLY__ */
#define pud_offset(pgdp, addr) \
(((pud_t *) pgd_page_vaddr(*(pgdp))) + \
(((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)))
#define pud_ERROR(e) \
pr_err("%s:%d: bad pud %08lx.\n", __FILE__, __LINE__, pud_val(e))
/*
* On all 4K setups, remap_4k_pfn() equates to remap_pfn_range() */
#define remap_4k_pfn(vma, addr, pfn, prot) \
remap_pfn_range((vma), (addr), (pfn), PAGE_SIZE, (prot))
#endif /* _ _ASM_POWERPC_NOHASH_64_PGTABLE_4K_H */
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