1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle 7 * Copyright (C) 2000, 2002 Maciej W. Rozycki 8 * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc. 9 */ 10#ifndef _ASM_MACH_GENERIC_SPACES_H 11#define _ASM_MACH_GENERIC_SPACES_H 12 13#include <linux/const.h> 14 15/* 16 * This gives the physical RAM offset. 17 */ 18#ifndef PHYS_OFFSET 19#define PHYS_OFFSET _AC(0, UL) 20#endif 21 22#ifdef CONFIG_32BIT 23#ifdef CONFIG_KVM_GUEST 24#define CAC_BASE _AC(0x40000000, UL) 25#else 26#define CAC_BASE _AC(0x80000000, UL) 27#endif 28#ifndef IO_BASE 29#define IO_BASE _AC(0xa0000000, UL) 30#endif 31#ifndef UNCAC_BASE 32#define UNCAC_BASE _AC(0xa0000000, UL) 33#endif 34 35#ifndef MAP_BASE 36#ifdef CONFIG_KVM_GUEST 37#define MAP_BASE _AC(0x60000000, UL) 38#else 39#define MAP_BASE _AC(0xc0000000, UL) 40#endif 41#endif 42 43/* 44 * Memory above this physical address will be considered highmem. 45 */ 46#ifndef HIGHMEM_START 47#define HIGHMEM_START _AC(0x20000000, UL) 48#endif 49 50#endif /* CONFIG_32BIT */ 51 52#ifdef CONFIG_64BIT 53 54#ifndef CAC_BASE 55#ifdef CONFIG_DMA_NONCOHERENT 56#define CAC_BASE _AC(0x9800000000000000, UL) 57#else 58#define CAC_BASE _AC(0xa800000000000000, UL) 59#endif 60#endif 61 62#ifndef IO_BASE 63#define IO_BASE _AC(0x9000000000000000, UL) 64#endif 65 66#ifndef UNCAC_BASE 67#define UNCAC_BASE _AC(0x9000000000000000, UL) 68#endif 69 70#ifndef MAP_BASE 71#define MAP_BASE _AC(0xc000000000000000, UL) 72#endif 73 74/* 75 * Memory above this physical address will be considered highmem. 76 * Fixme: 59 bits is a fictive number and makes assumptions about processors 77 * in the distant future. Nobody will care for a few years :-) 78 */ 79#ifndef HIGHMEM_START 80#define HIGHMEM_START (_AC(1, UL) << _AC(59, UL)) 81#endif 82 83#define TO_PHYS(x) ( ((x) & TO_PHYS_MASK)) 84#define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK)) 85#define TO_UNCAC(x) (UNCAC_BASE | ((x) & TO_PHYS_MASK)) 86 87#endif /* CONFIG_64BIT */ 88 89/* 90 * This handles the memory map. 91 */ 92#ifndef PAGE_OFFSET 93#define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET) 94#endif 95 96#ifndef FIXADDR_TOP 97#ifdef CONFIG_KVM_GUEST 98#define FIXADDR_TOP ((unsigned long)(long)(int)0x7ffe0000) 99#else 100#define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000) 101#endif 102#endif 103 104#endif /* __ASM_MACH_GENERIC_SPACES_H */ 105