Release 4.14 arch/m32r/include/asm/page.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_M32R_PAGE_H

#define _ASM_M32R_PAGE_H

#include <linux/const.h>

/* PAGE_SHIFT determines the page size */

#define PAGE_SHIFT	12

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

#define PAGE_MASK	(~(PAGE_SIZE-1))

#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(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..
 */


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;

typedef struct page *pgtable_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__ */

/*
 * 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.
 */


#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 ARCH_PFN_OFFSET		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

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

#endif /* _ASM_M32R_PAGE_H */
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Directory: arch/m32r/include/asm

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