Release 4.18 arch/riscv/include/asm/page.h
/*
* Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
* Copyright (C) 2012 Regents of the University of California
* Copyright (C) 2017 SiFive
* Copyright (C) 2017 XiaojingZhu <zhuxiaoj@ict.ac.cn>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _ASM_RISCV_PAGE_H
#define _ASM_RISCV_PAGE_H
#include <linux/pfn.h>
#include <linux/const.h>
#define PAGE_SHIFT (12)
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE - 1))
/*
* PAGE_OFFSET -- the first address of the first page of memory.
* When not using MMU this corresponds to the first free page in
* physical memory (aligned on a page boundary).
*/
#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
#define KERN_VIRT_SIZE (-PAGE_OFFSET)
#ifndef __ASSEMBLY__
#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
/* align addr on a size boundary - adjust address up/down if needed */
#define _ALIGN_UP(addr, size) (((addr)+((size)-1))&(~((size)-1)))
#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
/* align addr on a size boundary - adjust address up if needed */
#define _ALIGN(addr, size) _ALIGN_UP(addr, size)
#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
#define copy_user_page(vto, vfrom, vaddr, topg) \
memcpy((vto), (vfrom), PAGE_SIZE)
/*
* Use struct definitions to apply C type checking
*/
/* Page Global Directory entry */
typedef struct {
unsigned long pgd;
} pgd_t;
/* Page Table entry */
typedef struct {
unsigned long pte;
} pte_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) })
#ifdef CONFIG_64BITS
#define PTE_FMT "%016lx"
#else
#define PTE_FMT "%08lx"
#endif
extern unsigned long va_pa_offset;
extern unsigned long pfn_base;
extern unsigned long max_low_pfn;
extern unsigned long min_low_pfn;
#define __pa(x) ((unsigned long)(x) - va_pa_offset)
#define __va(x) ((void *)((unsigned long) (x) + va_pa_offset))
#define phys_to_pfn(phys) (PFN_DOWN(phys))
#define pfn_to_phys(pfn) (PFN_PHYS(pfn))
#define virt_to_pfn(vaddr) (phys_to_pfn(__pa(vaddr)))
#define pfn_to_virt(pfn) (__va(pfn_to_phys(pfn)))
#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
#define page_to_bus(page) (page_to_phys(page))
#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
#define pfn_valid(pfn) \
(((pfn) >= pfn_base) && (((pfn)-pfn_base) < max_mapnr))
#define ARCH_PFN_OFFSET (pfn_base)
#endif /* __ASSEMBLY__ */
#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>
/* vDSO support */
/* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */
#define __HAVE_ARCH_GATE_AREA
#endif /* _ASM_RISCV_PAGE_H */
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