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/*
* linux/include/asm-arm/arch-ebsa285/memory.h
*
* Copyright (c) 1996-1999 Russell King.
*
* 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_HOST_FOOTBRIDGE)
/*
* Task size: 3GB
*/
#define TASK_SIZE (0xc0000000UL)
/*
* Page offset: 3GB
*/
#define PAGE_OFFSET (0xc0000000UL)
#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)
#elif defined(CONFIG_ADDIN_FOOTBRIDGE)
#if defined(CONFIG_ARCH_CO285)
/*
* Task size: 1.5GB
*/
#define TASK_SIZE (0x60000000UL)
/*
* Page offset: 1.5GB
*/
#define PAGE_OFFSET (0x60000000UL)
#else
#error Add in your architecture here
#endif
#ifndef __ASSEMBLY__
extern unsigned long __virt_to_bus(unsigned long);
extern unsigned long __bus_to_virt(unsigned long);
#endif
#endif
/*
* On Footbridge machines, the dram is contiguous.
* On Host Footbridge, these conversions are constant.
* On an add-in footbridge, these depend on register settings.
*/
#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)
#endif
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