diff options
Diffstat (limited to 'arch/m68k/include/asm/motorola_pgtable.h')
| -rw-r--r-- | arch/m68k/include/asm/motorola_pgtable.h | 84 |
1 files changed, 42 insertions, 42 deletions
diff --git a/arch/m68k/include/asm/motorola_pgtable.h b/arch/m68k/include/asm/motorola_pgtable.h index 8076467eff4b..dcf6829b3eab 100644 --- a/arch/m68k/include/asm/motorola_pgtable.h +++ b/arch/m68k/include/asm/motorola_pgtable.h @@ -41,7 +41,10 @@ #define _PAGE_PROTNONE 0x004 -#ifndef __ASSEMBLY__ +/* We borrow bit 11 to store the exclusive marker in swap PTEs. */ +#define _PAGE_SWP_EXCLUSIVE 0x800 + +#ifndef __ASSEMBLER__ /* This is the cache mode to be used for pages containing page descriptors for * processors >= '040. It is in pte_mknocache(), and the variable is defined @@ -76,40 +79,7 @@ extern unsigned long mm_cachebits; #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_RONLY | _PAGE_ACCESSED | mm_cachebits) #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED | mm_cachebits) -/* Alternate definitions that are compile time constants, for - initializing protection_map. The cachebits are fixed later. */ -#define PAGE_NONE_C __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) -#define PAGE_SHARED_C __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED) -#define PAGE_COPY_C __pgprot(_PAGE_PRESENT | _PAGE_RONLY | _PAGE_ACCESSED) -#define PAGE_READONLY_C __pgprot(_PAGE_PRESENT | _PAGE_RONLY | _PAGE_ACCESSED) - -/* - * The m68k can't do page protection for execute, and considers that the same are read. - * Also, write permissions imply read permissions. This is the closest we can get.. - */ -#define __P000 PAGE_NONE_C -#define __P001 PAGE_READONLY_C -#define __P010 PAGE_COPY_C -#define __P011 PAGE_COPY_C -#define __P100 PAGE_READONLY_C -#define __P101 PAGE_READONLY_C -#define __P110 PAGE_COPY_C -#define __P111 PAGE_COPY_C - -#define __S000 PAGE_NONE_C -#define __S001 PAGE_READONLY_C -#define __S010 PAGE_SHARED_C -#define __S011 PAGE_SHARED_C -#define __S100 PAGE_READONLY_C -#define __S101 PAGE_READONLY_C -#define __S110 PAGE_SHARED_C -#define __S111 PAGE_SHARED_C - -/* - * 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)) +#define pmd_pgtable(pmd) ((pgtable_t)pmd_page_vaddr(pmd)) static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { @@ -129,13 +99,14 @@ static inline void pud_set(pud_t *pudp, pmd_t *pmdp) #define __pte_page(pte) ((unsigned long)__va(pte_val(pte) & PAGE_MASK)) #define pmd_page_vaddr(pmd) ((unsigned long)__va(pmd_val(pmd) & _TABLE_MASK)) -#define pud_page_vaddr(pud) ((unsigned long)__va(pud_val(pud) & _TABLE_MASK)) +#define pud_pgtable(pud) ((pmd_t *)__va(pud_val(pud) & _TABLE_MASK)) #define pte_none(pte) (!pte_val(pte)) #define pte_present(pte) (pte_val(pte) & (_PAGE_PRESENT | _PAGE_PROTNONE)) #define pte_clear(mm,addr,ptep) ({ pte_val(*(ptep)) = 0; }) +#define PFN_PTE_SHIFT PAGE_SHIFT #define pte_page(pte) virt_to_page(__va(pte_val(pte))) #define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) @@ -145,12 +116,13 @@ static inline void pud_set(pud_t *pudp, pmd_t *pmdp) #define pmd_present(pmd) (pmd_val(pmd) & _PAGE_TABLE) #define pmd_clear(pmdp) ({ pmd_val(*pmdp) = 0; }) +#define pmd_pfn(pmd) ((pmd_val(pmd) & _TABLE_MASK) >> PAGE_SHIFT) /* * m68k does not have huge pages (020/030 actually could), but generic code * expects pmd_page() to exists, only to then DCE it all. Provide a dummy to * make the compiler happy. */ -#define pmd_page(pmd) NULL +#define pmd_page(pmd) ((struct page *)NULL) #define pud_none(pud) (!pud_val(pud)) @@ -178,7 +150,7 @@ static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) |= _PAGE_RONLY; return pte; } static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~_PAGE_DIRTY; return pte; } static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; } -static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) &= ~_PAGE_RONLY; return pte; } +static inline pte_t pte_mkwrite_novma(pte_t pte){ pte_val(pte) &= ~_PAGE_RONLY; return pte; } static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= _PAGE_DIRTY; return pte; } static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= _PAGE_ACCESSED; return pte; } static inline pte_t pte_mknocache(pte_t pte) @@ -195,12 +167,40 @@ static inline pte_t pte_mkcache(pte_t pte) #define swapper_pg_dir kernel_pg_dir extern pgd_t kernel_pg_dir[128]; -/* Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e)) */ -#define __swp_type(x) (((x).val >> 4) & 0xff) +/* + * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that + * are !pte_none() && !pte_present(). + * + * Format of swap PTEs: + * + * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * <----------------- offset ------------> E <-- type ---> 0 0 0 0 + * + * E is the exclusive marker that is not stored in swap entries. + */ +#define __swp_type(x) (((x).val >> 4) & 0x7f) #define __swp_offset(x) ((x).val >> 12) -#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 4) | ((offset) << 12) }) +#define __swp_entry(type, offset) ((swp_entry_t) { (((type) & 0x7f) << 4) | ((offset) << 12) }) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) -#endif /* !__ASSEMBLY__ */ +static inline bool pte_swp_exclusive(pte_t pte) +{ + return pte_val(pte) & _PAGE_SWP_EXCLUSIVE; +} + +static inline pte_t pte_swp_mkexclusive(pte_t pte) +{ + pte_val(pte) |= _PAGE_SWP_EXCLUSIVE; + return pte; +} + +static inline pte_t pte_swp_clear_exclusive(pte_t pte) +{ + pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE; + return pte; +} + +#endif /* !__ASSEMBLER__ */ #endif /* _MOTOROLA_PGTABLE_H */ |