102 lines
2.2 KiB
C
102 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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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/const.h>
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/*
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* This gives the physical RAM offset.
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*/
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#ifndef PHYS_OFFSET
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#define PHYS_OFFSET _AC(0, UL)
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#endif
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#ifdef CONFIG_32BIT
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#ifdef CONFIG_KVM_GUEST
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#define CAC_BASE _AC(0x40000000, UL)
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#else
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#define CAC_BASE _AC(0x80000000, UL)
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#endif
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#ifndef IO_BASE
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#define IO_BASE _AC(0xa0000000, UL)
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#endif
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#ifndef UNCAC_BASE
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#define UNCAC_BASE _AC(0xa0000000, UL)
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#endif
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#ifndef MAP_BASE
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#ifdef CONFIG_KVM_GUEST
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#define MAP_BASE _AC(0x60000000, UL)
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#else
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#define MAP_BASE _AC(0xc0000000, UL)
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#endif
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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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*/
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#ifndef HIGHMEM_START
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#define HIGHMEM_START _AC(0x20000000, UL)
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#endif
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#endif /* CONFIG_32BIT */
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#ifdef CONFIG_64BIT
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#ifndef CAC_BASE
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#ifdef CONFIG_DMA_NONCOHERENT
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#define CAC_BASE _AC(0x9800000000000000, UL)
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#else
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#define CAC_BASE _AC(0xa800000000000000, UL)
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#endif
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#endif
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#ifndef IO_BASE
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#define IO_BASE _AC(0x9000000000000000, UL)
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#endif
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#ifndef UNCAC_BASE
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#define UNCAC_BASE _AC(0x9000000000000000, UL)
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#endif
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#ifndef MAP_BASE
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#define MAP_BASE _AC(0xc000000000000000, UL)
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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 (_AC(1, UL) << _AC(59, UL))
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#endif
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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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/*
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* This handles the memory map.
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*/
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#ifndef PAGE_OFFSET
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#define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET)
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#endif
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#ifndef FIXADDR_TOP
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#ifdef CONFIG_KVM_GUEST
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#define FIXADDR_TOP ((unsigned long)(long)(int)0x7ffe0000)
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#else
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#define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000)
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#endif
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#endif
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#endif /* __ASM_MACH_GENERIC_SPACES_H */
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