- #ifndef _ALPHA_PAGE_H
- #define _ALPHA_PAGE_H
- #include <asm/pal.h>
- /* PAGE_SHIFT determines the page size */
- #define PAGE_SHIFT 13
- #define PAGE_SIZE (1UL << PAGE_SHIFT)
- #define PAGE_MASK (~(PAGE_SIZE-1))
- #ifdef __KERNEL__
- #ifndef __ASSEMBLY__
- #define STRICT_MM_TYPECHECKS
- extern void clear_page(void *page);
- #define clear_user_page(page, vaddr) clear_page(page)
- extern void copy_page(void * _to, void * _from);
- #define copy_user_page(to, from, vaddr) copy_page(to, from)
- #ifdef STRICT_MM_TYPECHECKS
- /*
- * 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) } )
- #else
- /*
- * .. while these make it easier on the compiler
- */
- typedef unsigned long pte_t;
- typedef unsigned long pmd_t;
- typedef unsigned long pgd_t;
- typedef unsigned long pgprot_t;
- #define pte_val(x) (x)
- #define pmd_val(x) (x)
- #define pgd_val(x) (x)
- #define pgprot_val(x) (x)
- #define __pte(x) (x)
- #define __pgd(x) (x)
- #define __pgprot(x) (x)
- #endif /* STRICT_MM_TYPECHECKS */
- #define BUG()
- do {
- printk("kernel BUG at %s:%d!n", __FILE__, __LINE__);
- __asm__ __volatile__("call_pal %0 # bugchk" : : "i" (PAL_bugchk));
- } while (0)
- #define PAGE_BUG(page) BUG()
- /* 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;
- }
- #endif /* !__ASSEMBLY__ */
- /* to align the pointer to the (next) page boundary */
- #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
- #ifdef USE_48_BIT_KSEG
- #define PAGE_OFFSET 0xffff800000000000
- #else
- #define PAGE_OFFSET 0xfffffc0000000000
- #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 */
- #endif /* __KERNEL__ */
- #endif /* _ALPHA_PAGE_H */