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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* OpenRISC Linux
*
* Linux architectural port borrowing liberally from similar works of
* others. All original copyrights apply as per the original source
* declaration.
*
* OpenRISC implementation:
* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
* et al.
*/
#ifndef __ASM_OPENRISC_PAGE_H
#define __ASM_OPENRISC_PAGE_H
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT CONFIG_PAGE_SHIFT
#ifdef __ASSEMBLY__
#define PAGE_SIZE (1 << PAGE_SHIFT)
#else
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#endif
#define PAGE_MASK (~(PAGE_SIZE-1))
#define PAGE_OFFSET 0xc0000000
#define KERNELBASE PAGE_OFFSET
/* This is not necessarily the right place for this, but it's needed by
* drivers/of/fdt.c
*/
#include <asm/setup.h>
#ifndef __ASSEMBLY__
#define clear_page(page) memset((page), 0, PAGE_SIZE)
#define copy_page(to, from) memcpy((to), (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)
/*
* These are used to make use of C type-checking..
*/
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;
#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) })
#endif /* !__ASSEMBLY__ */
#ifndef __ASSEMBLY__
#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
static inline unsigned long virt_to_pfn(const void *kaddr)
{
return __pa(kaddr) >> PAGE_SHIFT;
}
static inline void * pfn_to_virt(unsigned long pfn)
{
return (void *)((unsigned long)__va(pfn) << PAGE_SHIFT);
}
#define virt_to_page(addr) \
(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
#define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
#define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr)))
#endif /* __ASSEMBLY__ */
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>
#endif /* __ASM_OPENRISC_PAGE_H */