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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 | /* * linux/include/asm-arm/arch-clps711x/mmu.h * * Copyright (C) 1999 ARM Limited * * 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; either version 2 of the License, or * (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef __ASM_ARCH_MMU_H #define __ASM_ARCH_MMU_H #include <linux/config.h> /* * Task size: 3GB */ #define TASK_SIZE (0xbf000000UL) #define TASK_SIZE_26 (0x04000000UL) /* * This decides where the kernel will search for a free chunk of vm * space during mmap's. */ #define TASK_UNMAPPED_BASE (0x40000000) /* * Page offset: 3GB */ #define PAGE_OFFSET (0xc0000000UL) #define PHYS_OFFSET (0xc0000000UL) /* * On integrator, the dram is contiguous */ #define __virt_to_phys__is_a_macro #define __virt_to_phys(vpage) ((vpage) - PAGE_OFFSET + PHYS_OFFSET) #define __phys_to_virt__is_a_macro #define __phys_to_virt(ppage) ((ppage) + PAGE_OFFSET - PHYS_OFFSET) /* * Virtual view <-> DMA view memory address translations * virt_to_bus: Used to translate the virtual address to an * address suitable to be passed to set_dma_addr * bus_to_virt: Used to convert an address for DMA operations * to an address that the kernel can use. */ #if defined(CONFIG_ARCH_CDB89712) #define __virt_to_bus__is_a_macro #define __virt_to_bus(x) (x) #define __bus_to_virt__is_a_macro #define __bus_to_virt(x) (x) #elif defined (CONFIG_ARCH_AUTCPU12) #define __virt_to_bus__is_a_macro #define __virt_to_bus(x) (x) #define __bus_to_virt__is_a_macro #define __bus_to_virt(x) (x) #else #define __virt_to_bus__is_a_macro #define __virt_to_bus(x) ((x) - PAGE_OFFSET) #define __bus_to_virt__is_a_macro #define __bus_to_virt(x) ((x) + PAGE_OFFSET) #endif /* * Like the SA1100, the EDB7211 has a large gap between physical RAM * banks. In 2.2, the Psion (CL-PS7110) port added custom support for * discontiguous physical memory. In 2.4, we can use the standard * Linux NUMA support. * * This is not necessary for EP7211 implementations with only one used * memory bank. For those systems, simply undefine CONFIG_DISCONTIGMEM. */ #ifdef CONFIG_DISCONTIGMEM /* * Because of the wide memory address space between physical RAM banks on the * SA1100, it's much more convenient to use Linux's NUMA support to implement * our memory map representation. Assuming all memory nodes have equal access * characteristics, we then have generic discontiguous memory support. * * Of course, all this isn't mandatory for SA1100 implementations with only * one used memory bank. For those, simply undefine CONFIG_DISCONTIGMEM. * * The nodes are matched with the physical memory bank addresses which are * incidentally the same as virtual addresses. * * node 0: 0xc0000000 - 0xc7ffffff * node 1: 0xc8000000 - 0xcfffffff * node 2: 0xd0000000 - 0xd7ffffff * node 3: 0xd8000000 - 0xdfffffff */ /* * Given a kernel address, find the home node of the underlying memory. */ #define KVADDR_TO_NID(addr) \ (((unsigned long)(addr) - PAGE_OFFSET) >> NODE_MAX_MEM_SHIFT) /* * Given a page frame number, convert it to a node id. */ #define PFN_TO_NID(pfn) \ (((pfn) - PHYS_PFN_OFFSET) >> (NODE_MAX_MEM_SHIFT - PAGE_SHIFT)) /* * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory * and returns the mem_map of that node. */ #define ADDR_TO_MAPBASE(kaddr) \ NODE_MEM_MAP(KVADDR_TO_NID((unsigned long)(kaddr))) #define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn)) /* * Given a kaddr, LOCAL_MAR_NR finds the owning node of the memory * and returns the index corresponding to the appropriate page in the * node's mem_map. */ #define LOCAL_MAP_NR(addr) \ (((unsigned long)(addr) & (NODE_MAX_MEM_SIZE - 1)) >> PAGE_SHIFT) /* * The PS7211 allows up to 256MB max per DRAM bank, but the EDB7211 * uses only one of the two banks (bank #1). However, even within * bank #1, memory is discontiguous. * * The EDB7211 has two 8MB DRAM areas with 8MB of empty space between * them, so we use 24 for the node max shift to get 16MB node sizes. */ #define NODE_MAX_MEM_SHIFT 24 #define NODE_MAX_MEM_SIZE (1<<NODE_MAX_MEM_SHIFT) #endif /* CONFIG_DISCONTIGMEM */ #endif |