| #ifndef _PARISC_PAGE_H |
| #define _PARISC_PAGE_H |
| |
| /* PAGE_SHIFT determines the page size */ |
| #define PAGE_SHIFT 12 |
| #define PAGE_SIZE (1UL << PAGE_SHIFT) |
| #define PAGE_MASK (~(PAGE_SIZE-1)) |
| |
| #ifdef __KERNEL__ |
| #ifndef __ASSEMBLY__ |
| |
| #include <asm/cache.h> |
| |
| #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) |
| #define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from)) |
| |
| extern void purge_kernel_dcache_page(unsigned long); |
| extern void copy_user_page_asm(void *to, void *from); |
| extern void clear_user_page_asm(void *page, unsigned long vaddr); |
| |
| static inline void |
| copy_user_page(void *to, void *from, unsigned long vaddr) |
| { |
| copy_user_page_asm(to, from); |
| flush_kernel_dcache_page(to); |
| } |
| |
| static inline void |
| clear_user_page(void *page, unsigned long vaddr) |
| { |
| purge_kernel_dcache_page((unsigned long)page); |
| clear_user_page_asm(page, vaddr); |
| } |
| |
| /* |
| * These are used to make use of C type-checking.. |
| */ |
| typedef struct { unsigned long pte; } pte_t; |
| typedef struct { unsigned long pmd; } pmd_t; |
| typedef struct { unsigned long pgd; } pgd_t; |
| typedef struct { unsigned long pgprot; } pgprot_t; |
| |
| #define pte_val(x) ((x).pte) |
| #define pmd_val(x) ((x).pmd) |
| #define pgd_val(x) ((x).pgd) |
| #define pgprot_val(x) ((x).pgprot) |
| |
| #define __pte(x) ((pte_t) { (x) } ) |
| #define __pmd(x) ((pmd_t) { (x) } ) |
| #define __pgd(x) ((pgd_t) { (x) } ) |
| #define __pgprot(x) ((pgprot_t) { (x) } ) |
| |
| /* Pure 2^n version of get_order */ |
| extern __inline__ int get_order(unsigned long size) |
| { |
| int order; |
| |
| size = (size-1) >> (PAGE_SHIFT-1); |
| order = -1; |
| do { |
| size >>= 1; |
| order++; |
| } while (size); |
| return order; |
| } |
| |
| #ifdef __LP64__ |
| #define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */ |
| #else |
| #define MAX_PHYSMEM_RANGES 1 /* First range is only range that fits in 32 bits */ |
| #endif |
| |
| typedef struct __physmem_range { |
| unsigned long start_pfn; |
| unsigned long pages; /* PAGE_SIZE pages */ |
| } physmem_range_t; |
| |
| extern physmem_range_t pmem_ranges[]; |
| extern int npmem_ranges; |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| /* to align the pointer to the (next) page boundary */ |
| #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) |
| |
| /* |
| * Tell the user there is some problem. Beep too, so we can |
| * see^H^H^Hhear bugs in early bootup as well! |
| * |
| * We don't beep yet. prumpf |
| */ |
| #define BUG() do { \ |
| printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ |
| } while (0) |
| |
| #define PAGE_BUG(page) do { \ |
| BUG(); \ |
| } while (0) |
| |
| |
| #define LINUX_GATEWAY_SPACE 0 |
| #define __PAGE_OFFSET (0x10000000) |
| |
| #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) |
| /* These macros don't work for 64-bit C code -- don't allow in C at all */ |
| #ifdef __ASSEMBLY__ |
| # define PA(x) ((x)-__PAGE_OFFSET) |
| # define VA(x) ((x)+__PAGE_OFFSET) |
| #endif |
| #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) |
| #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) |
| #ifndef CONFIG_DISCONTIGMEM |
| #define virt_to_page(kaddr) (mem_map + (__pa(kaddr) >> PAGE_SHIFT)) |
| #define VALID_PAGE(page) ((page - mem_map) < max_mapnr) |
| #endif /* !CONFIG_DISCONTIGMEM */ |
| |
| #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ |
| VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _PARISC_PAGE_H */ |