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#ifndef _OR32_PAGE_H
#define _OR32_PAGE_H
 
#include <linux/config.h>
 
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT		13
#define PAGE_SIZE		(1UL << PAGE_SHIFT)
#define PAGE_MASK		(~(PAGE_SIZE-1))
#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
 
#define PAGE_OFFSET		0xc0000000	
#define KERNELBASE  		PAGE_OFFSET
 
#ifdef __KERNEL__
 
#ifndef __ASSEMBLY__
#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(page, vaddr)    clear_page(page)
#define copy_user_page(to, from, vaddr) copy_page(to, from)
 
#define 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; } 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 */
 
#define BUG() do { \
  printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
} while (0)
 
#define PAGE_BUG(page) do { \
         BUG(); \
} while (0)
 
 
/* Pure 2^n version of get_order */
static __inline__ int get_order(unsigned long size)
{
	int order;
 
	size = (size-1) >> (PAGE_SHIFT-1);
	order = -1;
	do {
		size >>= 1;
		order++;
	} while (size);
	return order;
}
 
 
/* macros to convert between really physical and virtual addresses
 */
 
#define __pa(x)                 ((unsigned long)(x) - PAGE_OFFSET)
#define __va(x)                 ((void *)((unsigned long)(x) + PAGE_OFFSET))
 
#define virt_to_page(kaddr)    (mem_map + (((unsigned long)kaddr - PAGE_OFFSET) >> PAGE_SHIFT))
#define VALID_PAGE(page)       ((page - mem_map) < max_mapnr)
 
/* from linker script */
 
extern unsigned long dram_start, dram_end;
 
#endif /* __ASSEMBLY__ */
 
#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 
#endif /* __KERNEL__ */
 
#endif /* _OR32_PAGE_H */