| #ifndef _SUN3_PGTABLE_H |
| #define _SUN3_PGTABLE_H |
| |
| #include <asm/sun3mmu.h> |
| |
| #ifndef __ASSEMBLY__ |
| #include <asm/virtconvert.h> |
| #include <linux/linkage.h> |
| |
| /* |
| * 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) virt_to_page(__pte_page(pte)) |
| #define pmd_page(pmd) virt_to_page(__pmd_page(pmd)) |
| |
| |
| 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_write(pte_t pte) { return pte_val(pte) & SUN3_PAGE_WRITEABLE; } |
| 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 int pte_special(pte_t pte) { return 0; } |
| |
| static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_WRITEABLE; 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_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; } |
| static inline pte_t pte_mkspecial(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 */ |
