page.h
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#ifndef _ASMARM_PAGE_H
#define _ASMARM_PAGE_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__
#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__ */
#include <asm-generic/page.h>
#endif