/* * include/asm-v850/page.h -- VM ops * * Copyright (C) 2001,02,03,05 NEC Electronics Corporation * Copyright (C) 2001,02,03,05 Miles Bader <miles@gnu.org> * * This file is subject to the terms and conditions of the GNU General * Public License. See the file COPYING in the main directory of this * archive for more details. * * Written by Miles Bader <miles@gnu.org> */ #ifndef __V850_PAGE_H__ #define __V850_PAGE_H__ #include <asm/machdep.h> #define PAGE_SHIFT 12 #define PAGE_SIZE (1UL << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) /* * PAGE_OFFSET -- the first address of the first page of memory. For archs with * no MMU this corresponds to the first free page in physical memory (aligned * on a page boundary). */ #ifndef PAGE_OFFSET #define PAGE_OFFSET 0x0000000 #endif #ifdef __KERNEL__ #ifndef __ASSEMBLY__ #define STRICT_MM_TYPECHECKS #define clear_page(page) memset ((void *)(page), 0, PAGE_SIZE) #define copy_page(to, from) memcpy ((void *)(to), (void *)from, PAGE_SIZE) #define clear_user_page(addr, vaddr, page) \ do { clear_page(addr); \ flush_dcache_page(page); \ } while (0) #define copy_user_page(to, from, vaddr, page) \ do { copy_page(to, from); \ flush_dcache_page(page); \ } while (0) #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 /* !STRICT_MM_TYPECHECKS */ /* * .. 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 __pmd(x) (x) #define __pgd(x) (x) #define __pgprot(x) (x) #endif /* STRICT_MM_TYPECHECKS */ #endif /* !__ASSEMBLY__ */ /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) /* No current v850 processor has virtual memory. */ #define __virt_to_phys(addr) (addr) #define __phys_to_virt(addr) (addr) #define virt_to_pfn(kaddr) (__virt_to_phys (kaddr) >> PAGE_SHIFT) #define pfn_to_virt(pfn) __phys_to_virt ((pfn) << PAGE_SHIFT) #define MAP_NR(kaddr) \ (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) #define virt_to_page(kaddr) (mem_map + MAP_NR (kaddr)) #define page_to_virt(page) \ ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) #define pfn_to_page(pfn) virt_to_page (pfn_to_virt (pfn)) #define page_to_pfn(page) virt_to_pfn (page_to_virt (page)) #define pfn_valid(pfn) ((pfn) < max_mapnr) #define virt_addr_valid(kaddr) \ (((void *)(kaddr) >= (void *)PAGE_OFFSET) && MAP_NR (kaddr) < max_mapnr) #define __pa(x) __virt_to_phys ((unsigned long)(x)) #define __va(x) ((void *)__phys_to_virt ((unsigned long)(x))) #endif /* KERNEL */ #include <asm-generic/page.h> #endif /* __V850_PAGE_H__ */