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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* 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>
*/
#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))
#ifdef CONFIG_64BIT
#define HUGE_MAX_HSTATE 2
#else
#define HUGE_MAX_HSTATE 1
#endif
#define HPAGE_SHIFT PMD_SHIFT
#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
/*
* 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_64BIT
#define PTE_FMT "%016lx"
#else
#define PTE_FMT "%08lx"
#endif
#ifdef CONFIG_MMU
extern unsigned long va_pa_offset;
extern unsigned long pfn_base;
#define ARCH_PFN_OFFSET (pfn_base)
#else
#define va_pa_offset 0
#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
#endif /* CONFIG_MMU */
extern unsigned long max_low_pfn;
extern unsigned long min_low_pfn;
#define __pa_to_va_nodebug(x) ((void *)((unsigned long) (x) + va_pa_offset))
#define __va_to_pa_nodebug(x) ((unsigned long)(x) - va_pa_offset)
#ifdef CONFIG_DEBUG_VIRTUAL
extern phys_addr_t __virt_to_phys(unsigned long x);
extern phys_addr_t __phys_addr_symbol(unsigned long x);
#else
#define __virt_to_phys(x) __va_to_pa_nodebug(x)
#define __phys_addr_symbol(x) __va_to_pa_nodebug(x)
#endif /* CONFIG_DEBUG_VIRTUAL */
#define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
#define __pa(x) __virt_to_phys((unsigned long)(x))
#define __va(x) ((void *)__pa_to_va_nodebug((phys_addr_t)(x)))
#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)))
#ifdef CONFIG_FLATMEM
#define pfn_valid(pfn) \
(((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr))
#endif
#endif /* __ASSEMBLY__ */
#define virt_addr_valid(vaddr) ({ \
unsigned long _addr = (unsigned long)vaddr; \
(unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \
})
#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>
#endif /* _ASM_RISCV_PAGE_H */
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