#ifndef _ASM_M32R_PAGE_H #define _ASM_M32R_PAGE_H #include <linux/config.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__ #ifndef __ASSEMBLY__ extern void clear_page(void *to); extern void copy_page(void *to, void *from); #define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE /* * 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; #define pte_val(x) ((x).pte) #define PTE_MASK PAGE_MASK typedef struct { unsigned long pgprot; } pgprot_t; #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) } ) #endif /* !__ASSEMBLY__ */ /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) /* * This handles the memory map.. We could make this a config * option, but too many people screw it up, and too few need * it. * * A __PAGE_OFFSET of 0xC0000000 means that the kernel has * a virtual address space of one gigabyte, which limits the * amount of physical memory you can use to about 950MB. * * If you want more physical memory than this then see the CONFIG_HIGHMEM4G * and CONFIG_HIGHMEM64G options in the kernel configuration. */ /* This handles the memory map.. */ #define __MEMORY_START CONFIG_MEMORY_START #define __MEMORY_SIZE CONFIG_MEMORY_SIZE #ifdef CONFIG_MMU #define __PAGE_OFFSET (0x80000000) #else #define __PAGE_OFFSET (0x00000000) #endif #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) #ifndef CONFIG_DISCONTIGMEM #define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT) #define pfn_to_page(pfn) (mem_map + ((pfn) - PFN_BASE)) #define page_to_pfn(page) \ ((unsigned long)((page) - mem_map) + PFN_BASE) #define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr) #endif /* !CONFIG_DISCONTIGMEM */ #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC ) #define devmem_is_allowed(x) 1 #endif /* __KERNEL__ */ #include <asm-generic/page.h> #endif /* _ASM_M32R_PAGE_H */