1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * VM ops 4 * 5 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> 6 * Copyright (C) 2008-2009 PetaLogix 7 * Copyright (C) 2006 Atmark Techno, Inc. 8 * Changes for MMU support: 9 * Copyright (C) 2007 Xilinx, Inc. All rights reserved. 10 */ 11 12#ifndef _ASM_MICROBLAZE_PAGE_H 13#define _ASM_MICROBLAZE_PAGE_H 14 15#include <linux/pfn.h> 16#include <asm/setup.h> 17#include <asm/asm-compat.h> 18#include <linux/const.h> 19 20#ifdef __KERNEL__ 21 22/* PAGE_SHIFT determines the page size */ 23#define PAGE_SHIFT CONFIG_PAGE_SHIFT 24#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) 25#define PAGE_MASK (~(PAGE_SIZE-1)) 26 27#define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR)) 28 29#define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */ 30 31#ifndef __ASSEMBLY__ 32 33/* 34 * PAGE_OFFSET -- the first address of the first page of memory. With MMU 35 * it is set to the kernel start address (aligned on a page boundary). 36 * 37 * CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used 38 * in arch/microblaze/Makefile. 39 */ 40#define PAGE_OFFSET CONFIG_KERNEL_START 41 42/* 43 * The basic type of a PTE - 32 bit physical addressing. 44 */ 45typedef unsigned long pte_basic_t; 46#define PTE_FMT "%.8lx" 47 48# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 49# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) 50 51# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) 52# define copy_user_page(vto, vfrom, vaddr, topg) \ 53 memcpy((vto), (vfrom), PAGE_SIZE) 54 55/* 56 * These are used to make use of C type-checking.. 57 */ 58typedef struct page *pgtable_t; 59typedef struct { unsigned long pte; } pte_t; 60typedef struct { unsigned long pgprot; } pgprot_t; 61/* FIXME this can depend on linux kernel version */ 62typedef struct { unsigned long pgd; } pgd_t; 63 64# define pte_val(x) ((x).pte) 65# define pgprot_val(x) ((x).pgprot) 66 67# define pgd_val(x) ((x).pgd) 68 69# define __pte(x) ((pte_t) { (x) }) 70# define __pgd(x) ((pgd_t) { (x) }) 71# define __pgprot(x) ((pgprot_t) { (x) }) 72 73/** 74 * Conversions for virtual address, physical address, pfn, and struct 75 * page are defined in the following files. 76 * 77 * virt -+ 78 * | asm-microblaze/page.h 79 * phys -+ 80 * | linux/pfn.h 81 * pfn -+ 82 * | asm-generic/memory_model.h 83 * page -+ 84 * 85 */ 86 87extern unsigned long max_low_pfn; 88extern unsigned long min_low_pfn; 89extern unsigned long max_pfn; 90 91extern unsigned long memory_start; 92extern unsigned long memory_size; 93extern unsigned long lowmem_size; 94 95extern unsigned long kernel_tlb; 96 97extern int page_is_ram(unsigned long pfn); 98 99# define phys_to_pfn(phys) (PFN_DOWN(phys)) 100# define pfn_to_phys(pfn) (PFN_PHYS(pfn)) 101 102# define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)) 103# define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT) 104# define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 105 106# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT) 107# endif /* __ASSEMBLY__ */ 108 109/* Convert between virtual and physical address for MMU. */ 110/* Handle MicroBlaze processor with virtual memory. */ 111#define __virt_to_phys(addr) \ 112 ((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) 113#define __phys_to_virt(addr) \ 114 ((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) 115#define tophys(rd, rs) \ 116 addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) 117#define tovirt(rd, rs) \ 118 addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) 119 120#ifndef __ASSEMBLY__ 121 122# define __pa(x) __virt_to_phys((unsigned long)(x)) 123# define __va(x) ((void *)__phys_to_virt((unsigned long)(x))) 124 125static inline unsigned long virt_to_pfn(const void *vaddr) 126{ 127 return phys_to_pfn(__pa(vaddr)); 128} 129 130static inline const void *pfn_to_virt(unsigned long pfn) 131{ 132 return __va(pfn_to_phys((pfn))); 133} 134 135#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) 136 137#endif /* __ASSEMBLY__ */ 138 139#define TOPHYS(addr) __virt_to_phys(addr) 140 141#endif /* __KERNEL__ */ 142 143#include <asm-generic/memory_model.h> 144#include <asm-generic/getorder.h> 145 146#endif /* _ASM_MICROBLAZE_PAGE_H */ 147