2 * linux/include/asm-arm/arch-pxa/memory.h
4 * Author: Nicolas Pitre
5 * Copyright: (C) 2001 MontaVista Software Inc.
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.
12 #ifndef __ASM_ARCH_MEMORY_H
13 #define __ASM_ARCH_MEMORY_H
19 #define TASK_SIZE (0xbf000000UL)
20 #define TASK_SIZE_26 (0x04000000UL)
23 * This decides where the kernel will search for a free chunk of vm
24 * space during mmap's.
26 #define TASK_UNMAPPED_BASE (0x40000000)
31 #define PAGE_OFFSET (0xc0000000UL)
34 * Physical DRAM offset.
36 #define PHYS_OFFSET (0xa0000000UL)
39 * physical vs virtual ram conversion
41 #define __virt_to_phys__is_a_macro
42 #define __phys_to_virt__is_a_macro
43 #define __virt_to_phys(x) ((x) - PAGE_OFFSET + PHYS_OFFSET)
44 #define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET)
47 * Virtual view <-> DMA view memory address translations
48 * virt_to_bus: Used to translate the virtual address to an
49 * address suitable to be passed to set_dma_addr
50 * bus_to_virt: Used to convert an address for DMA operations
51 * to an address that the kernel can use.
53 #define __virt_to_bus__is_a_macro
54 #define __bus_to_virt__is_a_macro
55 #define __virt_to_bus(x) __virt_to_phys(x)
56 #define __bus_to_virt(x) __phys_to_virt(x)
58 #ifdef CONFIG_DISCONTIGMEM
60 * The nodes are matched with the physical SDRAM banks as follows:
62 * node 0: 0xa0000000-0xa3ffffff --> 0xc0000000-0xc3ffffff
63 * node 1: 0xa4000000-0xa7ffffff --> 0xc4000000-0xc7ffffff
64 * node 2: 0xa8000000-0xabffffff --> 0xc8000000-0xcbffffff
65 * node 3: 0xac000000-0xafffffff --> 0xcc000000-0xcfffffff
71 * Given a kernel address, find the home node of the underlying memory.
73 #define KVADDR_TO_NID(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> 26)
76 * Given a page frame number, convert it to a node id.
78 #define PFN_TO_NID(pfn) (((pfn) - PHYS_PFN_OFFSET) >> (26 - PAGE_SHIFT))
81 * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
82 * and returns the mem_map of that node.
84 #define ADDR_TO_MAPBASE(kaddr) NODE_MEM_MAP(KVADDR_TO_NID(kaddr))
87 * Given a page frame number, find the owning node of the memory
88 * and returns the mem_map of that node.
90 #define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn))
93 * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
94 * and returns the index corresponding to the appropriate page in the
97 #define LOCAL_MAP_NR(addr) \
98 (((unsigned long)(addr) & 0x03ffffff) >> PAGE_SHIFT)
102 #define PFN_TO_NID(addr) (0)