1/*
2 * linux/include/asm-arm/arch-nexuspci/memory.h
3 *
4 * Copyright (c) 1997, 1998, 2000 FutureTV Labs Ltd.
5 * Copyright (c) 1999 Russell King
6 *
7 */
8#ifndef __ASM_ARCH_MMU_H
9#define __ASM_ARCH_MMU_H
10
11/*
12 * Task size: 3GB
13 */
14#define TASK_SIZE	(0xc0000000UL)
15#define TASK_SIZE_26	(0x04000000UL)
16
17/*
18 * This decides where the kernel will search for a free chunk of vm
19 * space during mmap's.
20 */
21#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
22
23/*
24 * Page offset: 3GB
25 */
26#define PAGE_OFFSET	(0xc0000000UL)
27#define PHYS_OFFSET	(0x40000000UL)
28#define BUS_OFFSET	(0xe0000000UL)
29
30/*
31 * DRAM is contiguous
32 */
33#define __virt_to_phys(vpage) ((unsigned long)(vpage) - PAGE_OFFSET + PHYS_OFFSET)
34#define __phys_to_virt(ppage) ((unsigned long)(ppage) + PAGE_OFFSET - PHYS_OFFSET)
35#define __virt_to_phys__is_a_macro
36#define __phys_to_virt__is_a_macro
37
38/*
39 * On the PCI bus the DRAM appears at address 0xe0000000
40 */
41#define __virt_to_bus__is_a_macro
42#define __virt_to_bus(x) ((unsigned long)(x) - PAGE_OFFSET + BUS_OFFSET)
43#define __bus_to_virt__is_a_macro
44#define __bus_to_virt(x) ((unsigned long)(x) + PAGE_OFFSET - BUS_OFFSET)
45
46#define PHYS_TO_NID(addr)	(0)
47
48#endif
49