875d43e72b
Start cleaning 32-bit vs. 64-bit configuration. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle
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* Copyright (C) 2000, 2002 Maciej W. Rozycki
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* Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
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*/
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#ifndef _ASM_MACH_GENERIC_SPACES_H
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#define _ASM_MACH_GENERIC_SPACES_H
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#include <linux/config.h>
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#ifdef CONFIG_32BIT
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#define CAC_BASE 0x80000000
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#define IO_BASE 0xa0000000
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#define UNCAC_BASE 0xa0000000
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#define MAP_BASE 0xc0000000
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/*
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* This handles the memory map.
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* We handle pages at KSEG0 for kernels with 32 bit address space.
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*/
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#define PAGE_OFFSET 0x80000000UL
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/*
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* Memory above this physical address will be considered highmem.
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*/
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#ifndef HIGHMEM_START
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#define HIGHMEM_START 0x20000000UL
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#endif
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#endif /* CONFIG_32BIT */
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#ifdef CONFIG_64BIT
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/*
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* This handles the memory map.
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*/
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#ifdef CONFIG_DMA_NONCOHERENT
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#define PAGE_OFFSET 0x9800000000000000UL
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#else
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#define PAGE_OFFSET 0xa800000000000000UL
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#endif
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/*
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* Memory above this physical address will be considered highmem.
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* Fixme: 59 bits is a fictive number and makes assumptions about processors
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* in the distant future. Nobody will care for a few years :-)
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*/
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#ifndef HIGHMEM_START
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#define HIGHMEM_START (1UL << 59UL)
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#endif
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#ifdef CONFIG_DMA_NONCOHERENT
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#define CAC_BASE 0x9800000000000000
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#else
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#define CAC_BASE 0xa800000000000000
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#endif
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#define IO_BASE 0x9000000000000000
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#define UNCAC_BASE 0x9000000000000000
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#define MAP_BASE 0xc000000000000000
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#define TO_PHYS(x) ( ((x) & TO_PHYS_MASK))
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#define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK))
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#define TO_UNCAC(x) (UNCAC_BASE | ((x) & TO_PHYS_MASK))
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#endif /* CONFIG_64BIT */
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#endif /* __ASM_MACH_GENERIC_SPACES_H */
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