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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_M32R_PGTABLE_2LEVEL_H
#define _ASM_M32R_PGTABLE_2LEVEL_H
#ifdef __KERNEL__
/*
* traditional M32R two-level paging structure:
*/
#define PGDIR_SHIFT 22
#define PTRS_PER_PGD 1024
/*
* the M32R is two-level, so we don't really have any
* PMD directory physically.
*/
#define __PAGETABLE_PMD_FOLDED
#define PMD_SHIFT 22
#define PTRS_PER_PMD 1
#define PTRS_PER_PTE 1024
#define pte_ERROR(e) \
printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
#define pmd_ERROR(e) \
printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
#define pgd_ERROR(e) \
printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
/*
* The "pgd_xxx()" functions here are trivial for a folded two-level
* setup: the pgd is never bad, and a pmd always exists (as it's folded
* into the pgd entry)
*/
static inline int pgd_none(pgd_t pgd) { return 0; }
static inline int pgd_bad(pgd_t pgd) { return 0; }
static inline int pgd_present(pgd_t pgd) { return 1; }
#define pgd_clear(xp) do { } while (0)
/*
* Certain architectures need to do special things when PTEs
* within a page table are directly modified. Thus, the following
* hook is made available.
*/
#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
/*
* (pmds are folded into pgds so this doesn't get actually called,
* but the define is needed for a generic inline function.)
*/
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
#define set_pgd(pgdptr, pgdval) (*(pgdptr) = pgdval)
#define pgd_page_vaddr(pgd) \
((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))
#ifndef CONFIG_DISCONTIGMEM
#define pgd_page(pgd) (mem_map + ((pgd_val(pgd) >> PAGE_SHIFT) - PFN_BASE))
#endif /* !CONFIG_DISCONTIGMEM */
static inline pmd_t *pmd_offset(pgd_t * dir, unsigned long address)
{
return (pmd_t *) dir;
}
#define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0))
#define pte_same(a, b) (pte_val(a) == pte_val(b))
#define pte_page(x) pfn_to_page(pte_pfn(x))
#define pte_none(x) (!pte_val(x))
#define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT)
#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
#define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
#endif /* __KERNEL__ */
#endif /* _ASM_M32R_PGTABLE_2LEVEL_H */
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