d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* arch/arm/mach-footbridge/include/mach/memory.h
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*
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* Copyright (C) 1996-1999 Russell King.
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*
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* Changelog:
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* 20-Oct-1996 RMK Created
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* 31-Dec-1997 RMK Fixed definitions to reduce warnings.
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* 17-May-1998 DAG Added __virt_to_bus and __bus_to_virt functions.
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* 21-Nov-1998 RMK Changed __virt_to_bus and __bus_to_virt to macros.
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* 21-Mar-1999 RMK Added PAGE_OFFSET for co285 architecture.
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* Renamed to memory.h
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* Moved PAGE_OFFSET and TASK_SIZE here
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*/
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#ifndef __ASM_ARCH_MEMORY_H
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#define __ASM_ARCH_MEMORY_H
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#if defined(CONFIG_FOOTBRIDGE_ADDIN)
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/*
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* If we may be using add-in footbridge mode, then we must
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* use the out-of-line translation that makes use of the
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* PCI BAR
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*/
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#ifndef __ASSEMBLY__
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extern unsigned long __virt_to_bus(unsigned long);
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extern unsigned long __bus_to_virt(unsigned long);
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extern unsigned long __pfn_to_bus(unsigned long);
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extern unsigned long __bus_to_pfn(unsigned long);
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#endif
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#define __virt_to_bus __virt_to_bus
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#define __bus_to_virt __bus_to_virt
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#elif defined(CONFIG_FOOTBRIDGE_HOST)
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/*
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* The footbridge is programmed to expose the system RAM at 0xe0000000.
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* The requirement is that the RAM isn't placed at bus address 0, which
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* would clash with VGA cards.
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*/
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#define BUS_OFFSET 0xe0000000
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#define __virt_to_bus(x) ((x) + (BUS_OFFSET - PAGE_OFFSET))
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#define __bus_to_virt(x) ((x) - (BUS_OFFSET - PAGE_OFFSET))
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#define __pfn_to_bus(x) (__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET))
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#define __bus_to_pfn(x) __phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET))
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#else
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#error "Undefined footbridge mode"
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#endif
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/*
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* Cache flushing area.
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*/
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#define FLUSH_BASE 0xf9000000
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#define FLUSH_BASE_PHYS 0x50000000
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#endif
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