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#ifndef _CRIS_PAGE_H
#define _CRIS_PAGE_H
#include <linux/config.h>
#include <asm/arch/page.h>
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 13
#ifndef __ASSEMBLY__
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#else
#define PAGE_SIZE (1 << PAGE_SHIFT)
#endif
#define PAGE_MASK (~(PAGE_SIZE-1))
#ifdef __KERNEL__
#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, 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..
*/
#ifndef __ASSEMBLY__
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;
#endif
#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) } )
/* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */
/* for that before indexing into the page table starting at mem_map */
#define pfn_to_page(pfn) (mem_map + ((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)))
#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + (PAGE_OFFSET >> PAGE_SHIFT))
#define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr)
/* to index into the page map. our pages all start at physical addr PAGE_OFFSET so
* we can let the map start there. notice that we subtract PAGE_OFFSET because
* we start our mem_map there - in other ports they map mem_map physically and
* use __pa instead. in our system both the physical and virtual address of DRAM
* is too high to let mem_map start at 0, so we do it this way instead (similar
* to arm and m68k I think)
*/
#define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT))
#define VALID_PAGE(page) (((page) - mem_map) < max_mapnr)
#define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT)
/* convert a page (based on mem_map and forward) to a physical address
* do this by figuring out the virtual address and then use __pa
*/
#define page_to_phys(page) __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
#ifndef __ASSEMBLY__
#define BUG() do { \
printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
} 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;
}
#endif /* __ASSEMBLY__ */
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#endif /* __KERNEL__ */
#endif /* _CRIS_PAGE_H */
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