#ifndef _SUN3_PGTABLE_H #define _SUN3_PGTABLE_H #include #ifndef __ASSEMBLY__ #include #include /* * This file contains all the things which change drastically for the sun3 * pagetable stuff, to avoid making too much of a mess of the generic m68k * `pgtable.h'; this should only be included from the generic file. --m */ /* For virtual address to physical address conversion */ #define VTOP(addr) __pa(addr) #define PTOV(addr) __va(addr) #endif /* !__ASSEMBLY__ */ /* These need to be defined for compatibility although the sun3 doesn't use them */ #define _PAGE_NOCACHE030 0x040 #define _CACHEMASK040 (~0x060) #define _PAGE_NOCACHE_S 0x040 /* Page protection values within PTE. */ #define SUN3_PAGE_VALID (0x80000000) #define SUN3_PAGE_WRITEABLE (0x40000000) #define SUN3_PAGE_SYSTEM (0x20000000) #define SUN3_PAGE_NOCACHE (0x10000000) #define SUN3_PAGE_ACCESSED (0x02000000) #define SUN3_PAGE_MODIFIED (0x01000000) /* Externally used page protection values. */ #define _PAGE_PRESENT (SUN3_PAGE_VALID) #define _PAGE_ACCESSED (SUN3_PAGE_ACCESSED) #define PTE_FILE_MAX_BITS 28 /* Compound page protection values. */ //todo: work out which ones *should* have SUN3_PAGE_NOCACHE and fix... // is it just PAGE_KERNEL and PAGE_SHARED? #define PAGE_NONE __pgprot(SUN3_PAGE_VALID \ | SUN3_PAGE_ACCESSED \ | SUN3_PAGE_NOCACHE) #define PAGE_SHARED __pgprot(SUN3_PAGE_VALID \ | SUN3_PAGE_WRITEABLE \ | SUN3_PAGE_ACCESSED \ | SUN3_PAGE_NOCACHE) #define PAGE_COPY __pgprot(SUN3_PAGE_VALID \ | SUN3_PAGE_ACCESSED \ | SUN3_PAGE_NOCACHE) #define PAGE_READONLY __pgprot(SUN3_PAGE_VALID \ | SUN3_PAGE_ACCESSED \ | SUN3_PAGE_NOCACHE) #define PAGE_KERNEL __pgprot(SUN3_PAGE_VALID \ | SUN3_PAGE_WRITEABLE \ | SUN3_PAGE_SYSTEM \ | SUN3_PAGE_NOCACHE \ | SUN3_PAGE_ACCESSED \ | SUN3_PAGE_MODIFIED) #define PAGE_INIT __pgprot(SUN3_PAGE_VALID \ | SUN3_PAGE_WRITEABLE \ | SUN3_PAGE_SYSTEM \ | SUN3_PAGE_NOCACHE) /* * Page protections for initialising protection_map. The sun3 has only two * protection settings, valid (implying read and execute) and writeable. These * are as close as we can get... */ #define __P000 PAGE_NONE #define __P001 PAGE_READONLY #define __P010 PAGE_COPY #define __P011 PAGE_COPY #define __P100 PAGE_READONLY #define __P101 PAGE_READONLY #define __P110 PAGE_COPY #define __P111 PAGE_COPY #define __S000 PAGE_NONE #define __S001 PAGE_READONLY #define __S010 PAGE_SHARED #define __S011 PAGE_SHARED #define __S100 PAGE_READONLY #define __S101 PAGE_READONLY #define __S110 PAGE_SHARED #define __S111 PAGE_SHARED /* Use these fake page-protections on PMDs. */ #define SUN3_PMD_VALID (0x00000001) #define SUN3_PMD_MASK (0x0000003F) #define SUN3_PMD_MAGIC (0x0000002B) #ifndef __ASSEMBLY__ /* * Conversion functions: convert a page and protection to a page entry, * and a page entry and page directory to the page they refer to. */ #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { pte_val(pte) = (pte_val(pte) & SUN3_PAGE_CHG_MASK) | pgprot_val(newprot); return pte; } #define pmd_set(pmdp,ptep) do {} while (0) static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp) { pgd_val(*pgdp) = virt_to_phys(pmdp); } #define __pte_page(pte) \ ((unsigned long) __va ((pte_val (pte) & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT)) #define __pmd_page(pmd) \ ((unsigned long) __va (pmd_val (pmd) & PAGE_MASK)) static inline int pte_none (pte_t pte) { return !pte_val (pte); } static inline int pte_present (pte_t pte) { return pte_val (pte) & SUN3_PAGE_VALID; } static inline void pte_clear (struct mm_struct *mm, unsigned long addr, pte_t *ptep) { pte_val (*ptep) = 0; } #define pte_pfn(pte) (pte_val(pte) & SUN3_PAGE_PGNUM_MASK) #define pfn_pte(pfn, pgprot) \ ({ pte_t __pte; pte_val(__pte) = pfn | pgprot_val(pgprot); __pte; }) #define pte_page(pte) (mem_map+((__pte_page(pte) - PAGE_OFFSET) >> PAGE_SHIFT)) #define pmd_page(pmd) (mem_map+((__pmd_page(pmd) - PAGE_OFFSET) >> PAGE_SHIFT)) static inline int pmd_none2 (pmd_t *pmd) { return !pmd_val (*pmd); } #define pmd_none(pmd) pmd_none2(&(pmd)) //static inline int pmd_bad (pmd_t pmd) { return (pmd_val (pmd) & SUN3_PMD_MASK) != SUN3_PMD_MAGIC; } static inline int pmd_bad2 (pmd_t *pmd) { return 0; } #define pmd_bad(pmd) pmd_bad2(&(pmd)) static inline int pmd_present2 (pmd_t *pmd) { return pmd_val (*pmd) & SUN3_PMD_VALID; } /* #define pmd_present(pmd) pmd_present2(&(pmd)) */ #define pmd_present(pmd) (!pmd_none2(&(pmd))) static inline void pmd_clear (pmd_t *pmdp) { pmd_val (*pmdp) = 0; } 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; } static inline void pgd_clear (pgd_t *pgdp) {} #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 following only work if pte_present() is true. * Undefined behaviour if not... * [we have the full set here even if they don't change from m68k] */ static inline int pte_read(pte_t pte) { return 1; } static inline int pte_write(pte_t pte) { return pte_val(pte) & SUN3_PAGE_WRITEABLE; } static inline int pte_exec(pte_t pte) { return 1; } static inline int pte_dirty(pte_t pte) { return pte_val(pte) & SUN3_PAGE_MODIFIED; } static inline int pte_young(pte_t pte) { return pte_val(pte) & SUN3_PAGE_ACCESSED; } static inline int pte_file(pte_t pte) { return pte_val(pte) & SUN3_PAGE_ACCESSED; } static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_WRITEABLE; return pte; } static inline pte_t pte_rdprotect(pte_t pte) { return pte; } static inline pte_t pte_exprotect(pte_t pte) { return pte; } static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_MODIFIED; return pte; } static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_ACCESSED; return pte; } static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= SUN3_PAGE_WRITEABLE; return pte; } static inline pte_t pte_mkread(pte_t pte) { return pte; } static inline pte_t pte_mkexec(pte_t pte) { return pte; } static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= SUN3_PAGE_MODIFIED; return pte; } static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= SUN3_PAGE_ACCESSED; return pte; } static inline pte_t pte_mknocache(pte_t pte) { pte_val(pte) |= SUN3_PAGE_NOCACHE; return pte; } // use this version when caches work... //static inline pte_t pte_mkcache(pte_t pte) { pte_val(pte) &= SUN3_PAGE_NOCACHE; return pte; } // until then, use: static inline pte_t pte_mkcache(pte_t pte) { return pte; } extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; extern pgd_t kernel_pg_dir[PTRS_PER_PGD]; /* Find an entry in a pagetable directory. */ #define pgd_index(address) ((address) >> PGDIR_SHIFT) #define pgd_offset(mm, address) \ ((mm)->pgd + pgd_index(address)) /* Find an entry in a kernel pagetable directory. */ #define pgd_offset_k(address) pgd_offset(&init_mm, address) /* Find an entry in the second-level pagetable. */ static inline pmd_t *pmd_offset (pgd_t *pgd, unsigned long address) { return (pmd_t *) pgd; } static inline unsigned long pte_to_pgoff(pte_t pte) { return pte.pte & SUN3_PAGE_PGNUM_MASK; } static inline pte_t pgoff_to_pte(unsigned off) { pte_t pte = { off + SUN3_PAGE_ACCESSED }; return pte; } /* Find an entry in the third-level pagetable. */ #define pte_index(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE-1)) #define pte_offset_kernel(pmd, address) ((pte_t *) __pmd_page(*pmd) + pte_index(address)) /* FIXME: should we bother with kmap() here? */ #define pte_offset_map(pmd, address) ((pte_t *)kmap(pmd_page(*pmd)) + pte_index(address)) #define pte_offset_map_nested(pmd, address) pte_offset_map(pmd, address) #define pte_unmap(pte) kunmap(pte) #define pte_unmap_nested(pte) kunmap(pte) /* Macros to (de)construct the fake PTEs representing swap pages. */ #define __swp_type(x) ((x).val & 0x7F) #define __swp_offset(x) (((x).val) >> 7) #define __swp_entry(type,offset) ((swp_entry_t) { ((type) | ((offset) << 7)) }) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) #endif /* !__ASSEMBLY__ */ #endif /* !_SUN3_PGTABLE_H */