#ifndef _ASMARM_PAGE_H #define _ASMARM_PAGE_H #include <linux/config.h> #ifdef __KERNEL__ #ifndef __ASSEMBLY__ extern void __clear_user_page(void *p, unsigned long user); extern void __copy_user_page(void *to, const void *from, unsigned long user); extern void copy_page(void *to, const void *from); //FIXME these may be wrong on ARM26 #define clear_user_page(addr,vaddr,pg) \ do { \ preempt_disable(); \ __clear_user_page(addr, vaddr); \ preempt_enable(); \ } while (0) #define copy_user_page(to,from,vaddr,pg) \ do { \ preempt_disable(); \ __copy_user_page(to, from, vaddr); \ preempt_enable(); \ } while (0) #define clear_page(page) memzero((void *)(page), PAGE_SIZE) #define copy_page(to, from) __copy_user_page(to, from, 0); #undef STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS /* * These are used to make use of C type-checking.. */ typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long pmd; } pmd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define pgd_val(x) ((x).pgd) #define pte_val(x) ((x).pte) #define pmd_val(x) ((x).pmd) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) #else /* * .. while these make it easier on the compiler */ typedef unsigned long pgd_t; typedef unsigned long pte_t; typedef unsigned long pmd_t; typedef unsigned long pgprot_t; //FIXME - should these cast to unsigned long? #define pgd_val(x) (x) #define pte_val(x) (x) #define pmd_val(x) (x) #define pgprot_val(x) (x) #define __pte(x) (x) #define __pmd(x) (x) #define __pgprot(x) (x) #endif /* STRICT_MM_TYPECHECKS */ #endif /* !__ASSEMBLY__ */ #endif /* __KERNEL__ */ /* PAGE_SHIFT determines the page size. This is configurable. */ #if defined(CONFIG_PAGESIZE_16) #define PAGE_SHIFT 14 /* 16K */ #else /* default */ #define PAGE_SHIFT 15 /* 32K */ #endif #define EXEC_PAGESIZE 32768 #define PAGE_SIZE (1UL << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) #ifdef __KERNEL__ #ifndef __ASSEMBLY__ /* Pure 2^n version of get_order */ static 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; } #include <asm/memory.h> #endif /* !__ASSEMBLY__ */ #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #endif /* __KERNEL__ */ #endif