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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 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))) #ifdef CONFIG_FLATMEM #define pfn_valid(pfn) \ (((pfn) >= pfn_base) && (((pfn)-pfn_base) < max_mapnr)) #endif #define ARCH_PFN_OFFSET (pfn_base) #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_READ | VM_WRITE | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #include <asm-generic/memory_model.h> #include <asm-generic/getorder.h> #endif /* _ASM_RISCV_PAGE_H */
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