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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ALPHA_PAGE_H
#define _ALPHA_PAGE_H
#include <linux/const.h>
#include <asm/pal.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))
#ifndef __ASSEMBLY__
#define STRICT_MM_TYPECHECKS
extern void clear_page(void *page);
#define clear_user_page(page, vaddr, pg) clear_page(page)
#define vma_alloc_zeroed_movable_folio(vma, vaddr) \
vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false)
extern void copy_page(void * _to, void * _from);
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
#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
/*
* .. 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 __pgd(x) (x)
#define __pgprot(x) (x)
#endif /* STRICT_MM_TYPECHECKS */
typedef struct page *pgtable_t;
#ifdef USE_48_BIT_KSEG
#define PAGE_OFFSET 0xffff800000000000UL
#else
#define PAGE_OFFSET 0xfffffc0000000000UL
#endif
#else
#ifdef USE_48_BIT_KSEG
#define PAGE_OFFSET 0xffff800000000000
#else
#define PAGE_OFFSET 0xfffffc0000000000
#endif
#endif /* !__ASSEMBLY__ */
#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define virt_addr_valid(kaddr) pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>
#endif /* _ALPHA_PAGE_H */