1#ifndef _ASM_M32R_PGTABLE_2LEVEL_H 2#define _ASM_M32R_PGTABLE_2LEVEL_H 3#ifdef __KERNEL__ 4 5/* 6 * traditional M32R two-level paging structure: 7 */ 8 9#define PGDIR_SHIFT 22 10#define PTRS_PER_PGD 1024 11 12/* 13 * the M32R is two-level, so we don't really have any 14 * PMD directory physically. 15 */ 16#define PMD_SHIFT 22 17#define PTRS_PER_PMD 1 18 19#define PTRS_PER_PTE 1024 20 21#define pte_ERROR(e) \ 22 printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) 23#define pmd_ERROR(e) \ 24 printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) 25#define pgd_ERROR(e) \ 26 printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) 27 28/* 29 * The "pgd_xxx()" functions here are trivial for a folded two-level 30 * setup: the pgd is never bad, and a pmd always exists (as it's folded 31 * into the pgd entry) 32 */ 33static inline int pgd_none(pgd_t pgd) { return 0; } 34static inline int pgd_bad(pgd_t pgd) { return 0; } 35static inline int pgd_present(pgd_t pgd) { return 1; } 36#define pgd_clear(xp) do { } while (0) 37 38/* 39 * Certain architectures need to do special things when PTEs 40 * within a page table are directly modified. Thus, the following 41 * hook is made available. 42 */ 43#define set_pte(pteptr, pteval) (*(pteptr) = pteval) 44#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) 45 46/* 47 * (pmds are folded into pgds so this doesnt get actually called, 48 * but the define is needed for a generic inline function.) 49 */ 50#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval) 51#define set_pgd(pgdptr, pgdval) (*(pgdptr) = pgdval) 52 53#define pgd_page_vaddr(pgd) \ 54((unsigned long) __va(pgd_val(pgd) & PAGE_MASK)) 55 56#ifndef CONFIG_DISCONTIGMEM 57#define pgd_page(pgd) (mem_map + ((pgd_val(pgd) >> PAGE_SHIFT) - PFN_BASE)) 58#endif /* !CONFIG_DISCONTIGMEM */ 59 60static inline pmd_t *pmd_offset(pgd_t * dir, unsigned long address) 61{ 62 return (pmd_t *) dir; 63} 64 65#define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0)) 66#define pte_same(a, b) (pte_val(a) == pte_val(b)) 67#define pte_page(x) pfn_to_page(pte_pfn(x)) 68#define pte_none(x) (!pte_val(x)) 69#define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT) 70#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) 71#define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) 72 73#define PTE_FILE_MAX_BITS 29 74#define pte_to_pgoff(pte) (((pte_val(pte) >> 2) & 0x7f) | (((pte_val(pte) >> 10)) << 7)) 75#define pgoff_to_pte(off) ((pte_t) { (((off) & 0x7f) << 2) | (((off) >> 7) << 10) | _PAGE_FILE }) 76 77#endif /* __KERNEL__ */ 78#endif /* _ASM_M32R_PGTABLE_2LEVEL_H */ 79