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 #define IO_BASE _AC(0xa0000000, UL) 29 #define UNCAC_BASE _AC(0xa0000000, UL) 30 31 #ifndef MAP_BASE 32 #ifdef CONFIG_KVM_GUEST 33 #define MAP_BASE _AC(0x60000000, UL) 34 #else 35 #define MAP_BASE _AC(0xc0000000, UL) 36 #endif 37 #endif 38 39 /* 40 * Memory above this physical address will be considered highmem. 41 */ 42 #ifndef HIGHMEM_START 43 #define HIGHMEM_START _AC(0x20000000, UL) 44 #endif 45 46 #endif /* CONFIG_32BIT */ 47 48 #ifdef CONFIG_64BIT 49 50 #ifndef CAC_BASE 51 #ifdef CONFIG_DMA_NONCOHERENT 52 #define CAC_BASE _AC(0x9800000000000000, UL) 53 #else 54 #define CAC_BASE _AC(0xa800000000000000, UL) 55 #endif 56 #endif 57 58 #ifndef IO_BASE 59 #define IO_BASE _AC(0x9000000000000000, UL) 60 #endif 61 62 #ifndef UNCAC_BASE 63 #define UNCAC_BASE _AC(0x9000000000000000, UL) 64 #endif 65 66 #ifndef MAP_BASE 67 #define MAP_BASE _AC(0xc000000000000000, UL) 68 #endif 69 70 /* 71 * Memory above this physical address will be considered highmem. 72 * Fixme: 59 bits is a fictive number and makes assumptions about processors 73 * in the distant future. Nobody will care for a few years :-) 74 */ 75 #ifndef HIGHMEM_START 76 #define HIGHMEM_START (_AC(1, UL) << _AC(59, UL)) 77 #endif 78 79 #define TO_PHYS(x) ( ((x) & TO_PHYS_MASK)) 80 #define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK)) 81 #define TO_UNCAC(x) (UNCAC_BASE | ((x) & TO_PHYS_MASK)) 82 83 #endif /* CONFIG_64BIT */ 84 85 /* 86 * This handles the memory map. 87 */ 88 #ifndef PAGE_OFFSET 89 #define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET) 90 #endif 91 92 #ifndef FIXADDR_TOP 93 #define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000) 94 #endif 95 96 #endif /* __ASM_MACH_GENERIC_SPACES_H */ 97