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