Release 4.14 arch/cris/include/asm/page.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _CRIS_PAGE_H

#define _CRIS_PAGE_H

#include <arch/page.h>
#include <linux/const.h>

/* PAGE_SHIFT determines the page size */

#define PAGE_SHIFT	13

#define PAGE_SIZE	(_AC(1, UL) << PAGE_SHIFT)

#define PAGE_MASK	(~(PAGE_SIZE-1))


#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(movableflags, vma, vaddr) \
	alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, 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 pgd; } pgd_t;


typedef struct { unsigned long pgprot; } pgprot_t;

typedef struct page *pgtable_t;
#endif


#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) } )

/* 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 ARCH_PFN_OFFSET		(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 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)

#ifndef __ASSEMBLY__

#endif /* __ASSEMBLY__ */


#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>

#endif /* _CRIS_PAGE_H */

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Linus Torvalds
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Mikael Starvik
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Christoph Lameter
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Andrew Morton
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Martin Schwidefsky
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Kamezawa Hiroyuki
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Mel Gorman
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Jesper Nilsson
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2
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David Mosberger-Tang
4
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Stephen Rothwell
2
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Arnd Bergmann
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Directory: arch/cris/include/asm

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