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 #include <asm/mipsregs.h> 16 17 #ifndef IO_SPACE_LIMIT 18 #define IO_SPACE_LIMIT 0xffff 19 #endif 20 21 /* 22 * This gives the physical RAM offset. 23 */ 24 #ifndef __ASSEMBLY__ 25 # if defined(CONFIG_MIPS_AUTO_PFN_OFFSET) 26 # define PHYS_OFFSET ((unsigned long)PFN_PHYS(ARCH_PFN_OFFSET)) 27 # elif !defined(PHYS_OFFSET) 28 # define PHYS_OFFSET _AC(0, UL) 29 # endif 30 #endif /* __ASSEMBLY__ */ 31 32 #ifdef CONFIG_32BIT 33 #ifdef CONFIG_KVM_GUEST 34 #define CAC_BASE _AC(0x40000000, UL) 35 #else 36 #define CAC_BASE _AC(0x80000000, UL) 37 #endif 38 #ifndef IO_BASE 39 #define IO_BASE _AC(0xa0000000, UL) 40 #endif 41 #ifndef UNCAC_BASE 42 #define UNCAC_BASE _AC(0xa0000000, UL) 43 #endif 44 45 #ifndef MAP_BASE 46 #ifdef CONFIG_KVM_GUEST 47 #define MAP_BASE _AC(0x60000000, UL) 48 #else 49 #define MAP_BASE _AC(0xc0000000, UL) 50 #endif 51 #endif 52 53 /* 54 * Memory above this physical address will be considered highmem. 55 */ 56 #ifndef HIGHMEM_START 57 #define HIGHMEM_START _AC(0x20000000, UL) 58 #endif 59 60 #endif /* CONFIG_32BIT */ 61 62 #ifdef CONFIG_64BIT 63 64 #ifndef CAC_BASE 65 #define CAC_BASE PHYS_TO_XKPHYS(read_c0_config() & CONF_CM_CMASK, 0) 66 #endif 67 68 #ifndef IO_BASE 69 #define IO_BASE _AC(0x9000000000000000, UL) 70 #endif 71 72 #ifndef UNCAC_BASE 73 #define UNCAC_BASE _AC(0x9000000000000000, UL) 74 #endif 75 76 #ifndef MAP_BASE 77 #define MAP_BASE _AC(0xc000000000000000, UL) 78 #endif 79 80 /* 81 * Memory above this physical address will be considered highmem. 82 * Fixme: 59 bits is a fictive number and makes assumptions about processors 83 * in the distant future. Nobody will care for a few years :-) 84 */ 85 #ifndef HIGHMEM_START 86 #define HIGHMEM_START (_AC(1, UL) << _AC(59, UL)) 87 #endif 88 89 #define TO_PHYS(x) ( ((x) & TO_PHYS_MASK)) 90 #define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK)) 91 #define TO_UNCAC(x) (UNCAC_BASE | ((x) & TO_PHYS_MASK)) 92 93 #endif /* CONFIG_64BIT */ 94 95 /* 96 * This handles the memory map. 97 */ 98 #ifndef PAGE_OFFSET 99 #define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET) 100 #endif 101 102 #ifndef FIXADDR_TOP 103 #ifdef CONFIG_KVM_GUEST 104 #define FIXADDR_TOP ((unsigned long)(long)(int)0x7ffe0000) 105 #else 106 #define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000) 107 #endif 108 #endif 109 110 #endif /* __ASM_MACH_GENERIC_SPACES_H */ 111