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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | /* * 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) ({ \ 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> /* 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 */ |