1 /* 2 * Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle 3 * Copyright (C) 2000, 2002 Maciej W. Rozycki 4 * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc. 5 * 6 * SPDX-License-Identifier: GPL-2.0 7 */ 8 #ifndef _ASM_MACH_GENERIC_SPACES_H 9 #define _ASM_MACH_GENERIC_SPACES_H 10 11 #include <asm/const.h> 12 13 /* 14 * This gives the physical RAM offset. 15 */ 16 #ifndef PHYS_OFFSET 17 #define PHYS_OFFSET _AC(0, UL) 18 #endif 19 20 #ifdef CONFIG_32BIT 21 #ifdef CONFIG_KVM_GUEST 22 #define CAC_BASE _AC(0x40000000, UL) 23 #else 24 #define CAC_BASE _AC(0x80000000, UL) 25 #endif 26 #ifndef IO_BASE 27 #define IO_BASE _AC(0xa0000000, UL) 28 #endif 29 #ifndef UNCAC_BASE 30 #define UNCAC_BASE _AC(0xa0000000, UL) 31 #endif 32 33 #ifndef MAP_BASE 34 #ifdef CONFIG_KVM_GUEST 35 #define MAP_BASE _AC(0x60000000, UL) 36 #else 37 #define MAP_BASE _AC(0xc0000000, UL) 38 #endif 39 #endif 40 41 /* 42 * Memory above this physical address will be considered highmem. 43 */ 44 #ifndef HIGHMEM_START 45 #define HIGHMEM_START _AC(0x20000000, UL) 46 #endif 47 48 #endif /* CONFIG_32BIT */ 49 50 #ifdef CONFIG_64BIT 51 52 #ifndef CAC_BASE 53 #ifdef CONFIG_DMA_NONCOHERENT 54 #define CAC_BASE _AC(0x9800000000000000, UL) 55 #else 56 #define CAC_BASE _AC(0xa800000000000000, UL) 57 #endif 58 #endif 59 60 #ifndef IO_BASE 61 #define IO_BASE _AC(0x9000000000000000, UL) 62 #endif 63 64 #ifndef UNCAC_BASE 65 #define UNCAC_BASE _AC(0x9000000000000000, UL) 66 #endif 67 68 #ifndef MAP_BASE 69 #define MAP_BASE _AC(0xc000000000000000, UL) 70 #endif 71 72 /* 73 * Memory above this physical address will be considered highmem. 74 * Fixme: 59 bits is a fictive number and makes assumptions about processors 75 * in the distant future. Nobody will care for a few years :-) 76 */ 77 #ifndef HIGHMEM_START 78 #define HIGHMEM_START (_AC(1, UL) << _AC(59, UL)) 79 #endif 80 81 #define TO_PHYS(x) ( ((x) & TO_PHYS_MASK)) 82 #define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK)) 83 #define TO_UNCAC(x) (UNCAC_BASE | ((x) & TO_PHYS_MASK)) 84 85 #endif /* CONFIG_64BIT */ 86 87 /* 88 * This handles the memory map. 89 */ 90 #ifndef PAGE_OFFSET 91 #define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET) 92 #endif 93 94 #ifndef FIXADDR_TOP 95 #ifdef CONFIG_KVM_GUEST 96 #define FIXADDR_TOP ((unsigned long)(long)(int)0x7ffe0000) 97 #else 98 #define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000) 99 #endif 100 #endif 101 102 #endif /* __ASM_MACH_GENERIC_SPACES_H */ 103