tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * linux/include/asm-arm/arch-aaec2000/memory.h
3 *
4 * Copyright (c) 2005 Nicolas Bellido Y Ortega
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#ifndef __ASM_ARCH_MEMORY_H
12#define __ASM_ARCH_MEMORY_H
13
14#include <linux/config.h>
15
16#define PHYS_OFFSET (0xf0000000UL)
17
18#define __virt_to_bus(x) __virt_to_phys(x)
19#define __bus_to_virt(x) __phys_to_virt(x)
20
21#ifdef CONFIG_DISCONTIGMEM
22
23/*
24 * The nodes are the followings:
25 *
26 * node 0: 0xf000.0000 - 0xf3ff.ffff
27 * node 1: 0xf400.0000 - 0xf7ff.ffff
28 * node 2: 0xf800.0000 - 0xfbff.ffff
29 * node 3: 0xfc00.0000 - 0xffff.ffff
30 */
31
32/*
33 * Given a kernel address, find the home node of the underlying memory.
34 */
35#define KVADDR_TO_NID(addr) \
36 (((unsigned long)(addr) - PAGE_OFFSET) >> NODE_MAX_MEM_SHIFT)
37
38/*
39 * Given a page frame number, convert it to a node id.
40 */
41#define PFN_TO_NID(pfn) \
42 (((pfn) - PHYS_PFN_OFFSET) >> (NODE_MAX_MEM_SHIFT - PAGE_SHIFT))
43
44/*
45 * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
46 * and return the mem_map of that node.
47 */
48#define ADDR_TO_MAPBASE(kaddr) NODE_MEM_MAP(KVADDR_TO_NID(kaddr))
49
50/*
51 * Given a page frame number, find the owning node of the memory
52 * and return the mem_map of that node.
53 */
54#define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn))
55
56/*
57 * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
58 * and returns the index corresponding to the appropriate page in the
59 * node's mem_map.
60 */
61#define LOCAL_MAP_NR(addr) \
62 (((unsigned long)(addr) & (NODE_MAX_MEM_SIZE - 1)) >> PAGE_SHIFT)
63
64#define NODE_MAX_MEM_SHIFT 26
65#define NODE_MAX_MEM_SIZE (1 << NODE_MAX_MEM_SHIFT)
66
67#endif /* CONFIG_DISCONTIGMEM */
68
69#endif /* __ASM_ARCH_MEMORY_H */