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- /*
- * 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 */
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