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/*
* linux/include/asm-arm/arch-ebsa285/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_MMU_H
#define __ASM_ARCH_MMU_H
#include <linux/config.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
#elif defined(CONFIG_FOOTBRIDGE_HOST)
#define __virt_to_bus__is_a_macro
#define __virt_to_bus(x) ((x) - 0xe0000000)
#define __bus_to_virt__is_a_macro
#define __bus_to_virt(x) ((x) + 0xe0000000)
#else
#error "Undefined footbridge mode"
#endif
#if defined(CONFIG_ARCH_FOOTBRIDGE)
/* Task size and page offset at 3GB */
#define TASK_SIZE (0xc0000000UL)
#define PAGE_OFFSET (0xc0000000UL)
#elif defined(CONFIG_ARCH_CO285)
/* Task size and page offset at 1.5GB */
#define TASK_SIZE (0x60000000UL)
#define PAGE_OFFSET (0x60000000UL)
#else
#error "Undefined footbridge architecture"
#endif
#define TASK_SIZE_26 (0x04000000UL)
#define PHYS_OFFSET (0x00000000UL)
/*
* This decides where the kernel will search for a free chunk of vm
* space during mmap's.
*/
#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
/*
* The DRAM is always contiguous.
*/
#define __virt_to_phys__is_a_macro
#define __virt_to_phys(vpage) ((unsigned long)(vpage) - PAGE_OFFSET)
#define __phys_to_virt__is_a_macro
#define __phys_to_virt(ppage) ((unsigned long)(ppage) + PAGE_OFFSET)
#define PHYS_TO_NID(addr) (0)
#endif
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