ia64/linux-2.6.18-xen.hg

view include/asm-arm/arch-pxa/memory.h @ 782:9ab1c319531f

merge with linux-2.6.18-xen.hg
author Isaku Yamahata <yamahata@valinux.co.jp>
date Wed Jan 28 13:07:23 2009 +0900 (2009-01-28)
parents 831230e53067
children
line source
1 /*
2 * linux/include/asm-arm/arch-pxa/memory.h
3 *
4 * Author: Nicolas Pitre
5 * Copyright: (C) 2001 MontaVista Software Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
12 #ifndef __ASM_ARCH_MEMORY_H
13 #define __ASM_ARCH_MEMORY_H
15 /*
16 * Physical DRAM offset.
17 */
18 #define PHYS_OFFSET UL(0xa0000000)
20 /*
21 * Virtual view <-> DMA view memory address translations
22 * virt_to_bus: Used to translate the virtual address to an
23 * address suitable to be passed to set_dma_addr
24 * bus_to_virt: Used to convert an address for DMA operations
25 * to an address that the kernel can use.
26 */
27 #define __virt_to_bus(x) __virt_to_phys(x)
28 #define __bus_to_virt(x) __phys_to_virt(x)
30 #ifdef CONFIG_DISCONTIGMEM
31 /*
32 * The nodes are matched with the physical SDRAM banks as follows:
33 *
34 * node 0: 0xa0000000-0xa3ffffff --> 0xc0000000-0xc3ffffff
35 * node 1: 0xa4000000-0xa7ffffff --> 0xc4000000-0xc7ffffff
36 * node 2: 0xa8000000-0xabffffff --> 0xc8000000-0xcbffffff
37 * node 3: 0xac000000-0xafffffff --> 0xcc000000-0xcfffffff
38 */
40 /*
41 * Given a kernel address, find the home node of the underlying memory.
42 */
43 #define KVADDR_TO_NID(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> 26)
45 /*
46 * Given a page frame number, convert it to a node id.
47 */
48 #define PFN_TO_NID(pfn) (((pfn) - PHYS_PFN_OFFSET) >> (26 - PAGE_SHIFT))
50 /*
51 * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
52 * and returns the mem_map of that node.
53 */
54 #define ADDR_TO_MAPBASE(kaddr) NODE_MEM_MAP(KVADDR_TO_NID(kaddr))
56 /*
57 * Given a page frame number, find the owning node of the memory
58 * and returns the mem_map of that node.
59 */
60 #define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn))
62 /*
63 * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
64 * and returns the index corresponding to the appropriate page in the
65 * node's mem_map.
66 */
67 #define LOCAL_MAP_NR(addr) \
68 (((unsigned long)(addr) & 0x03ffffff) >> PAGE_SHIFT)
70 #endif
72 #endif