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b5ee900258
Let's provide an overridable default instead of having every machine class define __virt_to_bus and __bus_to_virt to the same thing. What most platforms are using is bus_addr == phys_addr so such is the default. One exception is ebsa110 which has no DMA what so ever, so the actual definition is not important except only for proper compilation. Also added a comment about the special footbridge bus translation. Let's also remove comments alluding to set_dma_addr which is not (and should not) be commonly used. Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
41 lines
1.0 KiB
C
41 lines
1.0 KiB
C
/*
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* arch/arm/mach-rpc/include/mach/memory.h
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*
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* Copyright (C) 1996,1997,1998 Russell King.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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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* 11-Jan-1998 RMK Uninlined to reduce hits on cache
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* 08-Feb-1998 RMK Added __virt_to_bus and __bus_to_virt
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* 21-Mar-1999 RMK Renamed to memory.h
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* RMK Added TASK_SIZE and PAGE_OFFSET
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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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/*
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* Physical DRAM offset.
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*/
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#define PHYS_OFFSET UL(0x10000000)
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/*
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* Cache flushing area - ROM
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*/
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#define FLUSH_BASE_PHYS 0x00000000
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#define FLUSH_BASE 0xdf000000
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/*
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* Sparsemem support. Each section is a maximum of 64MB. The sections
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* are offset by 128MB and can cover 128MB, so that gives us a maximum
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* of 29 physmem bits.
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*/
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#define MAX_PHYSMEM_BITS 29
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#define SECTION_SIZE_BITS 26
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#endif
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