[deliverable/linux.git] / arch / mips / include / asm / mach-generic / spaces.h

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle
 * Copyright (C) 2000, 2002  Maciej W. Rozycki
 * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
 */
#ifndef _ASM_MACH_GENERIC_SPACES_H
#define _ASM_MACH_GENERIC_SPACES_H

#include <linux/const.h>

/*
 * This gives the physical RAM offset.
 */
#ifndef PHYS_OFFSET
#define PHYS_OFFSET		_AC(0, UL)
#endif

#ifdef CONFIG_32BIT

#define CAC_BASE		_AC(0x80000000, UL)
#define IO_BASE			_AC(0xa0000000, UL)
#define UNCAC_BASE		_AC(0xa0000000, UL)

#ifndef MAP_BASE
#define MAP_BASE		_AC(0xc0000000, UL)
#endif

/*
 * Memory above this physical address will be considered highmem.
 */
#ifndef HIGHMEM_START
#define HIGHMEM_START		_AC(0x20000000, UL)
#endif

#endif /* CONFIG_32BIT */

#ifdef CONFIG_64BIT

#ifndef CAC_BASE
#ifdef CONFIG_DMA_NONCOHERENT
#define CAC_BASE		_AC(0x9800000000000000, UL)
#else
#define CAC_BASE		_AC(0xa800000000000000, UL)
#endif
#endif

#ifndef IO_BASE
#define IO_BASE			_AC(0x9000000000000000, UL)
#endif

#ifndef UNCAC_BASE
#define UNCAC_BASE		_AC(0x9000000000000000, UL)
#endif

#ifndef MAP_BASE
#define MAP_BASE		_AC(0xc000000000000000, UL)
#endif

/*
 * Memory above this physical address will be considered highmem.
 * Fixme: 59 bits is a fictive number and makes assumptions about processors
 * in the distant future.  Nobody will care for a few years :-)
 */
#ifndef HIGHMEM_START
#define HIGHMEM_START		(_AC(1, UL) << _AC(59, UL))
#endif

#define TO_PHYS(x)		(	      ((x) & TO_PHYS_MASK))
#define TO_CAC(x)		(CAC_BASE   | ((x) & TO_PHYS_MASK))
#define TO_UNCAC(x)		(UNCAC_BASE | ((x) & TO_PHYS_MASK))

#endif /* CONFIG_64BIT */

/*
 * This handles the memory map.
 */
#ifndef PAGE_OFFSET
#define PAGE_OFFSET		(CAC_BASE + PHYS_OFFSET)
#endif

#ifndef FIXADDR_TOP
#define FIXADDR_TOP		((unsigned long)(long)(int)0xfffe0000)
#endif

#endif /* __ASM_MACH_GENERIC_SPACES_H */
Commit	Line	Data
	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	/*
	16	* This gives the physical RAM offset.
	17	*/
	18	#ifndef PHYS_OFFSET
	19	#define PHYS_OFFSET _AC(0, UL)
	20	#endif
	21
	22	#ifdef CONFIG_32BIT
	23
	24	#define CAC_BASE _AC(0x80000000, UL)
	25	#define IO_BASE _AC(0xa0000000, UL)
	26	#define UNCAC_BASE _AC(0xa0000000, UL)
	27
	28	#ifndef MAP_BASE
	29	#define MAP_BASE _AC(0xc0000000, UL)
	30	#endif
	31
	32	/*
	33	* Memory above this physical address will be considered highmem.
	34	*/
	35	#ifndef HIGHMEM_START
	36	#define HIGHMEM_START _AC(0x20000000, UL)
	37	#endif
	38
	39	#endif /* CONFIG_32BIT */
	40
	41	#ifdef CONFIG_64BIT
	42
	43	#ifndef CAC_BASE
	44	#ifdef CONFIG_DMA_NONCOHERENT
	45	#define CAC_BASE _AC(0x9800000000000000, UL)
	46	#else
	47	#define CAC_BASE _AC(0xa800000000000000, UL)
	48	#endif
	49	#endif
	50
	51	#ifndef IO_BASE
	52	#define IO_BASE _AC(0x9000000000000000, UL)
	53	#endif
	54
	55	#ifndef UNCAC_BASE
	56	#define UNCAC_BASE _AC(0x9000000000000000, UL)
	57	#endif
	58
	59	#ifndef MAP_BASE
	60	#define MAP_BASE _AC(0xc000000000000000, UL)
	61	#endif
	62
	63	/*
	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 :-)
	67	*/
	68	#ifndef HIGHMEM_START
	69	#define HIGHMEM_START (_AC(1, UL) << _AC(59, UL))
	70	#endif
	71
	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))
	75
	76	#endif /* CONFIG_64BIT */
	77
	78	/*
	79	* This handles the memory map.
	80	*/
	81	#ifndef PAGE_OFFSET
	82	#define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET)
	83	#endif
	84
	85	#ifndef FIXADDR_TOP
	86	#define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000)
	87	#endif
	88
	89	#endif /* __ASM_MACH_GENERIC_SPACES_H */