blob: 8d64f45740873e419c62f8547031322c1894836a [file] [log] [blame]
* 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
* If we may be using add-in footbridge mode, then we must
* use the out-of-line translation that makes use of the
#ifndef __ASSEMBLY__
extern unsigned long __virt_to_bus(unsigned long);
extern unsigned long __bus_to_virt(unsigned long);
extern unsigned long __pfn_to_bus(unsigned long);
extern unsigned long __bus_to_pfn(unsigned long);
#define __virt_to_bus __virt_to_bus
#define __bus_to_virt __bus_to_virt
* The footbridge is programmed to expose the system RAM at 0xe0000000.
* The requirement is that the RAM isn't placed at bus address 0, which
* would clash with VGA cards.
#define BUS_OFFSET 0xe0000000
#define __virt_to_bus(x) ((x) + (BUS_OFFSET - PAGE_OFFSET))
#define __bus_to_virt(x) ((x) - (BUS_OFFSET - PAGE_OFFSET))
#define __pfn_to_bus(x) (__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET))
#define __bus_to_pfn(x) __phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET))
#error "Undefined footbridge mode"
* Cache flushing area.
#define FLUSH_BASE 0xf9000000
* Physical DRAM offset.
#define PHYS_OFFSET UL(0x00000000)
#define FLUSH_BASE_PHYS 0x50000000