#ifndef _ALPHA_PAGE_H #define _ALPHA_PAGE_H #include <linux/config.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, pg) clear_page(page) #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vmaddr) #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE extern void copy_page(void * _to, void * _from); #define copy_user_page(to, from, vaddr, pg) 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 */ /* 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 USE_48_BIT_KSEG #define PAGE_OFFSET 0xffff800000000000UL #else #define PAGE_OFFSET 0xfffffc0000000000UL #endif #else #ifdef USE_48_BIT_KSEG #define PAGE_OFFSET 0xffff800000000000 #else #define PAGE_OFFSET 0xfffffc0000000000 #endif #endif /* !__ASSEMBLY__ */ /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) #ifndef CONFIG_DISCONTIGMEM #define pfn_to_page(pfn) (mem_map + (pfn)) #define page_to_pfn(page) ((unsigned long)((page) - mem_map)) #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #define pfn_valid(pfn) ((pfn) < max_mapnr) #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #endif /* CONFIG_DISCONTIGMEM */ #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #endif /* __KERNEL__ */ #endif /* _ALPHA_PAGE_H */