#ifndef _ASM_M32R_PGTABLE_2LEVEL_H #define _ASM_M32R_PGTABLE_2LEVEL_H #ifdef __KERNEL__ #include <linux/config.h> /* * 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 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) #define set_pte_atomic(pteptr, pteval) set_pte(pteptr, pteval) /* * (pmds are folded into pgds so this doesnt 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(pgd) \ ((unsigned long) __va(pgd_val(pgd) & PAGE_MASK)) 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)) #define PTE_FILE_MAX_BITS 29 #define pte_to_pgoff(pte) (((pte_val(pte) >> 2) & 0xef) | (((pte_val(pte) >> 10)) << 7)) #define pgoff_to_pte(off) ((pte_t) { (((off) & 0xef) << 2) | (((off) >> 7) << 10) | _PAGE_FILE }) #endif /* __KERNEL__ */ #endif /* _ASM_M32R_PGTABLE_2LEVEL_H */