/*
* 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>
#include <asm/mipsregs.h>
#ifndef IO_SPACE_LIMIT
#define IO_SPACE_LIMIT 0xffff
#endif
/*
* This gives the physical RAM offset.
*/
#ifndef __ASSEMBLY__
# if defined(CONFIG_MIPS_AUTO_PFN_OFFSET)
# define PHYS_OFFSET ((unsigned long)PFN_PHYS(ARCH_PFN_OFFSET))
# elif !defined(PHYS_OFFSET)
# define PHYS_OFFSET _AC(0, UL)
# endif
#endif /* __ASSEMBLY__ */
#ifdef CONFIG_32BIT
#define CAC_BASE _AC(0x80000000, UL)
#ifndef IO_BASE
#define IO_BASE _AC(0xa0000000, UL)
#endif
#ifndef UNCAC_BASE
#define UNCAC_BASE _AC(0xa0000000, UL)
#endif
#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
#define CAC_BASE PHYS_TO_XKPHYS(read_c0_config() & CONF_CM_CMASK, 0)
#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 */
