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
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.
10 #ifndef _ASM_MACH_GENERIC_SPACES_H
11 #define _ASM_MACH_GENERIC_SPACES_H
13 #include <linux/const.h>
16 * This gives the physical RAM offset.
19 #define PHYS_OFFSET _AC(0, UL)
24 #define CAC_BASE _AC(0x80000000, UL)
25 #define IO_BASE _AC(0xa0000000, UL)
26 #define UNCAC_BASE _AC(0xa0000000, UL)
29 #define MAP_BASE _AC(0xc0000000, UL)
33 * Memory above this physical address will be considered highmem.
36 #define HIGHMEM_START _AC(0x20000000, UL)
39 #endif /* CONFIG_32BIT */
44 #ifdef CONFIG_DMA_NONCOHERENT
45 #define CAC_BASE _AC(0x9800000000000000, UL)
47 #define CAC_BASE _AC(0xa800000000000000, UL)
52 #define IO_BASE _AC(0x9000000000000000, UL)
56 #define UNCAC_BASE _AC(0x9000000000000000, UL)
60 #define MAP_BASE _AC(0xc000000000000000, UL)
64 * Memory above this physical address will be considered highmem.
65 * Fixme: 59 bits is a fictive number and makes assumptions about processors
66 * in the distant future. Nobody will care for a few years :-)
69 #define HIGHMEM_START (_AC(1, UL) << _AC(59, UL))
72 #define TO_PHYS(x) ( ((x) & TO_PHYS_MASK))
73 #define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK))
74 #define TO_UNCAC(x) (UNCAC_BASE | ((x) & TO_PHYS_MASK))
76 #endif /* CONFIG_64BIT */
79 * This handles the memory map.
82 #define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET)
85 #endif /* __ASM_MACH_GENERIC_SPACES_H */