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