1c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 2c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * linux/include/asm-arm/memory.h 3c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 4c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Copyright (C) 2000-2002 Russell King 5c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * modification for nommu, Hyok S. Choi, 2004 6c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 7c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * This program is free software; you can redistribute it and/or modify 8c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * it under the terms of the GNU General Public License version 2 as 9c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * published by the Free Software Foundation. 10c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 11c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Note: this file should not be included by non-asm/.h files 12c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 13c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef __ASM_ARM_MEMORY_H 14c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __ASM_ARM_MEMORY_H 15c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 16c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 17c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Allow for constants defined here to be used from assembly code 18c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * by prepending the UL suffix only with actual C code compilation. 19c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 20c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef __ASSEMBLY__ 21c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define UL(x) (x##UL) 22c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 23c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define UL(x) (x) 24c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 25c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 26c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/compiler.h> 27c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm/arch/memory.h> 28c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm/sizes.h> 29c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 30c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef CONFIG_MMU 31c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 32c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef TASK_SIZE 33c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 34c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * TASK_SIZE - the maximum size of a user space task. 35c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area 36c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 37c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define TASK_SIZE UL(0xbf000000) 38c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define TASK_UNMAPPED_BASE UL(0x40000000) 39c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 40c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 41c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 42c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The maximum size of a 26-bit user space task. 43c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 44c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define TASK_SIZE_26 UL(0x04000000) 45c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 46c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 47c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Page offset: 3GB 48c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 49c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef PAGE_OFFSET 50c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PAGE_OFFSET UL(0xc0000000) 51c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 52c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 53c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 54c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The module space lives between the addresses given by TASK_SIZE 55c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * and PAGE_OFFSET - it must be within 32MB of the kernel text. 56c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 57c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define MODULE_END (PAGE_OFFSET) 58c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define MODULE_START (MODULE_END - 16*1048576) 59c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 60c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#if TASK_SIZE > MODULE_START 61c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#error Top of user space clashes with start of module space 62c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 63c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 64c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 65c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The XIP kernel gets mapped at the bottom of the module vm area. 66c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Since we use sections to map it, this macro replaces the physical address 67c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * with its virtual address while keeping offset from the base section. 68c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 69c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define XIP_VIRT_ADDR(physaddr) (MODULE_START + ((physaddr) & 0x000fffff)) 70c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 71c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 72c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Allow 16MB-aligned ioremap pages 73c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 74c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define IOREMAP_MAX_ORDER 24 75c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 76c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else /* CONFIG_MMU */ 77c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 78c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 79c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The limitation of user task size can grow up to the end of free ram region. 80c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * It is difficult to define and perhaps will never meet the original meaning 81c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * of this define that was meant to. 82c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Fortunately, there is no reference for this in noMMU mode, for now. 83c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 84c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef TASK_SIZE 85c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define TASK_SIZE (CONFIG_DRAM_SIZE) 86c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 87c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 88c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef TASK_UNMAPPED_BASE 89c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define TASK_UNMAPPED_BASE UL(0x00000000) 90c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 91c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 92c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef PHYS_OFFSET 93c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PHYS_OFFSET (CONFIG_DRAM_BASE) 94c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 95c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 96c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef END_MEM 97c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define END_MEM (CONFIG_DRAM_BASE + CONFIG_DRAM_SIZE) 98c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 99c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 100c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef PAGE_OFFSET 101c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PAGE_OFFSET (PHYS_OFFSET) 102c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 103c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 104c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 105c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The module can be at any place in ram in nommu mode. 106c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 107c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define MODULE_END (END_MEM) 108c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define MODULE_START (PHYS_OFFSET) 109c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 110c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* !CONFIG_MMU */ 111c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 112c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 113c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Size of DMA-consistent memory region. Must be multiple of 2M, 114c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * between 2MB and 14MB inclusive. 115c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 116c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef CONSISTENT_DMA_SIZE 117c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define CONSISTENT_DMA_SIZE SZ_2M 118c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 119c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 120c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 121c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Physical vs virtual RAM address space conversion. These are 122c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * private definitions which should NOT be used outside memory.h 123c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * files. Use virt_to_phys/phys_to_virt/__pa/__va instead. 124c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 125c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef __virt_to_phys 126c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __virt_to_phys(x) ((x) - PAGE_OFFSET + PHYS_OFFSET) 127c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET) 128c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 129c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 130c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 131c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Convert a physical address to a Page Frame Number and back 132c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 133c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __phys_to_pfn(paddr) ((paddr) >> PAGE_SHIFT) 134c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT) 135c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 136c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef __ASSEMBLY__ 137c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 138c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 139c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The DMA mask corresponding to the maximum bus address allocatable 140c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * using GFP_DMA. The default here places no restriction on DMA 141c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * allocations. This must be the smallest DMA mask in the system, 142c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * so a successful GFP_DMA allocation will always satisfy this. 143c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 144c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef ISA_DMA_THRESHOLD 145c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define ISA_DMA_THRESHOLD (0xffffffffULL) 146c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 147c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 148c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef arch_adjust_zones 149c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define arch_adjust_zones(node,size,holes) do { } while (0) 150c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 151c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 152c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 153c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * PFNs are used to describe any physical page; this means 154c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * PFN 0 == physical address 0. 155c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 156c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * This is the PFN of the first RAM page in the kernel 157c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * direct-mapped view. We assume this is the first page 158c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * of RAM in the mem_map as well. 159c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 160c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT) 161c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 162c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 163c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * These are *only* valid on the kernel direct mapped RAM memory. 164c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Note: Drivers should NOT use these. They are the wrong 165c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * translation for translating DMA addresses. Use the driver 166c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * DMA support - see dma-mapping.h. 167c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 168c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline unsigned long virt_to_phys(void *x) 169c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 170c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru return __virt_to_phys((unsigned long)(x)); 171c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 172c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 173c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline void *phys_to_virt(unsigned long x) 174c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 175c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru return (void *)(__phys_to_virt((unsigned long)(x))); 176c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 177c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 178c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 179c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Drivers should NOT use these either. 180c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 181c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __pa(x) __virt_to_phys((unsigned long)(x)) 182c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __va(x) ((void *)__phys_to_virt((unsigned long)(x))) 183c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 184c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 185c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 186c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Virtual <-> DMA view memory address translations 187c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Again, these are *only* valid on the kernel direct mapped RAM 188c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * memory. Use of these is *deprecated* (and that doesn't mean 189c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * use the __ prefixed forms instead.) See dma-mapping.h. 190c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 191c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline __deprecated unsigned long virt_to_bus(void *x) 192c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 193c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru return __virt_to_bus((unsigned long)x); 194c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 195c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 196c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline __deprecated void *bus_to_virt(unsigned long x) 197c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 198c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru return (void *)__bus_to_virt(x); 199c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 200c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 201c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 202c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Conversion between a struct page and a physical address. 203c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 204c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Note: when converting an unknown physical address to a 205c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * struct page, the resulting pointer must be validated 206c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * using VALID_PAGE(). It must return an invalid struct page 207c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * for any physical address not corresponding to a system 208c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * RAM address. 209c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 210c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * page_to_pfn(page) convert a struct page * to a PFN number 211c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * pfn_to_page(pfn) convert a _valid_ PFN number to struct page * 212c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * pfn_valid(pfn) indicates whether a PFN number is valid 213c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 214c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * virt_to_page(k) convert a _valid_ virtual address to struct page * 215c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * virt_addr_valid(k) indicates whether a virtual address is valid 216c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 217c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef CONFIG_DISCONTIGMEM 218c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET 219c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pfn_valid(pfn) ((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr)) 220c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 221c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 222c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) 223c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 224c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PHYS_TO_NID(addr) (0) 225c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 226c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else /* CONFIG_DISCONTIGMEM */ 227c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 228c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 229c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * This is more complex. We have a set of mem_map arrays spread 230c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * around in memory. 231c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 232c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/numa.h> 233c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define arch_pfn_to_nid(pfn) PFN_TO_NID(pfn) 234c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define arch_local_page_offset(pfn, nid) LOCAL_MAP_NR((pfn) << PAGE_SHIFT) 235c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 236c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pfn_valid(pfn) \ 237c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru ({ \ 238c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned int nid = PFN_TO_NID(pfn); \ 239c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru int valid = nid < MAX_NUMNODES; \ 240c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru if (valid) { \ 241c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru pg_data_t *node = NODE_DATA(nid); \ 242c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru valid = (pfn - node->node_start_pfn) < \ 243c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru node->node_spanned_pages; \ 244c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } \ 245c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru valid; \ 246c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru }) 247c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 248c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define virt_to_page(kaddr) \ 249c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru (ADDR_TO_MAPBASE(kaddr) + LOCAL_MAP_NR(kaddr)) 250c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 251c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define virt_addr_valid(kaddr) (KVADDR_TO_NID(kaddr) < MAX_NUMNODES) 252c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 253c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 254c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Common discontigmem stuff. 255c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * PHYS_TO_NID is used by the ARM kernel/setup.c 256c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 257c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PHYS_TO_NID(addr) PFN_TO_NID((addr) >> PAGE_SHIFT) 258c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 259c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* !CONFIG_DISCONTIGMEM */ 260c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 261c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 262c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * For BIO. "will die". Kill me when bio_to_phys() and bvec_to_phys() die. 263c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 264c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 265c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 266c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 267c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Optional device DMA address remapping. Do _not_ use directly! 268c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * We should really eliminate virt_to_bus() here - it's deprecated. 269c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 270c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef __arch_page_to_dma 271c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define page_to_dma(dev, page) ((dma_addr_t)__virt_to_bus((unsigned long)page_address(page))) 272c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define dma_to_virt(dev, addr) ((void *)__bus_to_virt(addr)) 273c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define virt_to_dma(dev, addr) ((dma_addr_t)__virt_to_bus((unsigned long)(addr))) 274c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 275c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define page_to_dma(dev, page) (__arch_page_to_dma(dev, page)) 276c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define dma_to_virt(dev, addr) (__arch_dma_to_virt(dev, addr)) 277c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define virt_to_dma(dev, addr) (__arch_virt_to_dma(dev, addr)) 278c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 279c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 280c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 281c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Optional coherency support. Currently used only by selected 282c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Intel XSC3-based systems. 283c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 284c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef arch_is_coherent 285c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define arch_is_coherent() 0 286c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 287c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 288c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 289c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 290c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm-generic/memory_model.h> 291c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 292c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 293