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/*
* arch/arm/mach-footbridge/include/mach/memory.h
*
* Copyright (C) 1996-1999 Russell King.
*
* 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.
*
* Changelog:
* 20-Oct-1996 RMK Created
* 31-Dec-1997 RMK Fixed definitions to reduce warnings.
* 17-May-1998 DAG Added __virt_to_bus and __bus_to_virt functions.
* 21-Nov-1998 RMK Changed __virt_to_bus and __bus_to_virt to macros.
* 21-Mar-1999 RMK Added PAGE_OFFSET for co285 architecture.
* Renamed to memory.h
* Moved PAGE_OFFSET and TASK_SIZE here
*/
#ifndef __ASM_ARCH_MEMORY_H
#define __ASM_ARCH_MEMORY_H
#if defined(CONFIG_FOOTBRIDGE_ADDIN)
/*
* If we may be using add-in footbridge mode, then we must
* use the out-of-line translation that makes use of the
* PCI BAR
*/
#ifndef __ASSEMBLY__
extern unsigned long __virt_to_bus(unsigned long);
extern unsigned long __bus_to_virt(unsigned long);
#endif
#define __virt_to_bus __virt_to_bus
#define __bus_to_virt __bus_to_virt
#elif defined(CONFIG_FOOTBRIDGE_HOST)
/*
* The footbridge is programmed to expose the system RAM at the corresponding
* address. So, if PAGE_OFFSET is 0xc0000000, RAM appears at 0xe0000000.
* If 0x80000000, then its exposed at 0xa0000000 on the bus. etc.
* The only requirement is that the RAM isn't placed at bus address 0 which
* would clash with VGA cards.
*/
#define __virt_to_bus(x) ((x) - 0xe0000000)
#define __bus_to_virt(x) ((x) + 0xe0000000)
#else
#error "Undefined footbridge mode"
#endif
/*
* Cache flushing area.
*/
#define FLUSH_BASE 0xf9000000
/*
* Physical DRAM offset.
*/
#define PHYS_OFFSET UL(0x00000000)
#define FLUSH_BASE_PHYS 0x50000000
#endif
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