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 #define CAC_BASE _AC(0x80000000, UL) 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 #define MAP_BASE _AC(0xc0000000, UL) 43 #endif 44 45 /* 46 * Memory above this physical address will be considered highmem. 47 */ 48 #ifndef HIGHMEM_START 49 #define HIGHMEM_START _AC(0x20000000, UL) 50 #endif 51 52 #define CKSEG0ADDR_OR_64BIT(x) CKSEG0ADDR(x) 53 #define CKSEG1ADDR_OR_64BIT(x) CKSEG1ADDR(x) 54 #endif /* CONFIG_32BIT */ 55 56 #ifdef CONFIG_64BIT 57 58 #ifndef CAC_BASE 59 #define CAC_BASE PHYS_TO_XKPHYS(read_c0_config() & CONF_CM_CMASK, 0) 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 #define CKSEG0ADDR_OR_64BIT(x) TO_CAC(x) 88 #define CKSEG1ADDR_OR_64BIT(x) TO_UNCAC(x) 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 #define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000) 100 #endif 101 102 #endif /* __ASM_MACH_GENERIC_SPACES_H */ 103