/* *  linux/include/asm-arm/page.h * *  Copyright (C) 1995-2003 Russell King * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */#ifndef _ASMARM_PAGE_H#define _ASMARM_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__ /* to align the pointer to the (next) page boundary */#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK) #ifndef __ASSEMBLY__ #include <asm/glue.h> /* *	User Space Model *	================ * *	This section selects the correct set of functions for dealing with *	page-based copying and clearing for user space for the particular *	processor(s) we're building for. * *	We have the following to choose from: *	  v3		- ARMv3 *	  v4wt		- ARMv4 with writethrough cache, without minicache *	  v4wb		- ARMv4 with writeback cache, without minicache *	  v4_mc		- ARMv4 with minicache *	  xscale	- Xscale *	  xsc3		- XScalev3 */#undef _USER#undef MULTI_USER #ifdef CONFIG_CPU_COPY_V3# ifdef _USER#  define MULTI_USER 1# else#  define _USER v3# endif#endif #ifdef CONFIG_CPU_COPY_V4WT# ifdef _USER#  define MULTI_USER 1# else#  define _USER v4wt# endif#endif #ifdef CONFIG_CPU_COPY_V4WB# ifdef _USER#  define MULTI_USER 1# else#  define _USER v4wb# endif#endif #ifdef CONFIG_CPU_SA1100# ifdef _USER#  define MULTI_USER 1# else#  define _USER v4_mc# endif#endif #ifdef CONFIG_CPU_XSCALE# ifdef _USER#  define MULTI_USER 1# else#  define _USER xscale_mc# endif#endif #ifdef CONFIG_CPU_XSC3# ifdef _USER#  define MULTI_USER 1# else#  define _USER xsc3_mc# endif#endif #ifdef CONFIG_CPU_COPY_V6# define MULTI_USER 1#endif #if !defined(_USER) && !defined(MULTI_USER)#error Unknown user operations model#endif struct cpu_user_fns {	void (*cpu_clear_user_page)(void *p, unsigned long user);	void (*cpu_copy_user_page)(void *to, const void *from,				   unsigned long user);}; #ifdef MULTI_USERextern struct cpu_user_fns cpu_user; #define __cpu_clear_user_page	cpu_user.cpu_clear_user_page#define __cpu_copy_user_page	cpu_user.cpu_copy_user_page #else #define __cpu_clear_user_page	__glue(_USER,_clear_user_page)#define __cpu_copy_user_page	__glue(_USER,_copy_user_page) extern void __cpu_clear_user_page(void *p, unsigned long user);extern void __cpu_copy_user_page(void *to, const void *from,				 unsigned long user);#endif #define clear_user_page(addr,vaddr,pg)	 __cpu_clear_user_page(addr, vaddr)#define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr) #define clear_page(page)	memzero((void *)(page), PAGE_SIZE)extern void copy_page(void *to, const void *from); #undef STRICT_MM_TYPECHECKS #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[2]; } 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[0])#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 pte_t;typedef unsigned long pmd_t;typedef unsigned long pgd_t[2];typedef unsigned long pgprot_t; #define pte_val(x)      (x)#define pmd_val(x)      (x)#define pgd_val(x)	((x)[0])#define pgprot_val(x)   (x) #define __pte(x)        (x)#define __pmd(x)        (x)#define __pgprot(x)     (x) #endif /* STRICT_MM_TYPECHECKS */ /* the upper-most page table pointer */extern pmd_t *top_pmd; #include <asm/memory.h> #endif /* !__ASSEMBLY__ */ #define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) /* * With EABI on ARMv5 and above we must have 64-bit aligned slab pointers. */#if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5)#define ARCH_SLAB_MINALIGN 8#endif #endif /* __KERNEL__ */ #include <asm-generic/page.h> #endif