/* * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) * * 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 __ASM_ARC_PAGE_H #define __ASM_ARC_PAGE_H #include <uapi/asm/page.h> #ifndef __ASSEMBLY__ #define clear_page(paddr) memset((paddr), 0, PAGE_SIZE) #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) struct vm_area_struct; struct page; #define __HAVE_ARCH_COPY_USER_HIGHPAGE void copy_user_highpage(struct page *to, struct page *from, unsigned long u_vaddr, struct vm_area_struct *vma); void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); #undef STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS /* * These are used to make use of C type-checking.. */ typedef struct { #ifdef CONFIG_ARC_HAS_PAE40 unsigned long long pte; #else unsigned long pte; #endif } pte_t; typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define pte_val(x) ((x).pte) #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) }) #define __pgd(x) ((pgd_t) { (x) }) #define __pgprot(x) ((pgprot_t) { (x) }) #define pte_pgprot(x) __pgprot(pte_val(x)) #else /* !STRICT_MM_TYPECHECKS */ #ifdef CONFIG_ARC_HAS_PAE40 typedef unsigned long long pte_t; #else typedef unsigned long pte_t; #endif typedef unsigned long pgd_t; typedef unsigned long pgprot_t; #define pte_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) #define pte_pgprot(x) (x) #endif typedef pte_t * pgtable_t; /* * Use virt_to_pfn with caution: * If used in pte or paddr related macros, it could cause truncation * in PAE40 builds * As a rule of thumb, only use it in helpers starting with virt_ * You have been warned ! */ #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) #define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_RAM_BASE) #ifdef CONFIG_FLATMEM #define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr) #endif /* * __pa, __va, virt_to_page (ALERT: deprecated, don't use them) * * These macros have historically been misnamed * virt here means link-address/program-address as embedded in object code. * And for ARC, link-addr = physical address */ #define __pa(vaddr) ((unsigned long)(vaddr)) #define __va(paddr) ((void *)((unsigned long)(paddr))) #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) #define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) /* Default Permissions for stack/heaps pages (Non Executable) */ #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #define WANT_PAGE_VIRTUAL 1 #include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */ #include <asm-generic/getorder.h> #endif /* !__ASSEMBLY__ */ #endif