blob: 09e90be622fe04513e113233d99efab4560ea074 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*
* linux/include/asm-arm/arch-sa1100/mmzone.h
*
* (C) 1999-2000, Nicolas Pitre <nico@cam.org>
* (inspired by Kanoj Sarcar's code)
*
* Because of the wide memory address space between physical RAM banks on the
* SA1100, it's much convenient to use Linux's NUMA support to implement our
* memory map representation. Assuming all memory nodes have equal access
* characteristics, we then have generic discontigous memory support.
*
* Of course, all this isn't mandatory for SA1100 implementations with only
* one used memory bank. For those, simply undefine CONFIG_DISCONTIGMEM.
*
* The nodes are matched with the physical memory bank addresses which are
* incidentally the same as virtual addresses.
*
* node 0: 0xc0000000 - 0xc7ffffff
* node 1: 0xc8000000 - 0xcfffffff
* node 2: 0xd0000000 - 0xd7ffffff
* node 3: 0xd8000000 - 0xdfffffff
*/
/*
* Currently defined in arch/arm/mm/mm-sa1100.c
*/
extern pg_data_t sa1100_node_data[];
/*
* Return a pointer to the node data for node n.
*/
#define NODE_DATA(nid) (&sa1100_node_data[nid])
/*
* NODE_MEM_MAP gives the kaddr for the mem_map of the node.
*/
#define NODE_MEM_MAP(nid) (NODE_DATA(nid)->node_mem_map)
/*
* Given a kernel address, find the home node of the underlying memory.
*/
#define KVADDR_TO_NID(addr) \
(((unsigned long)(addr) & 0x18000000) >> 27)
/*
* Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
* and returns the the mem_map of that node.
*/
#define ADDR_TO_MAPBASE(kaddr) \
NODE_MEM_MAP(KVADDR_TO_NID((unsigned long)(kaddr)))
/*
* Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
* and returns the index corresponding to the appropriate page in the
* node's mem_map.
*/
#define LOCAL_MAP_NR(kvaddr) \
(((unsigned long)(kvaddr) & 0x07ffffff) >> PAGE_SHIFT)
/*
* Given a kaddr, virt_to_page returns a pointer to the corresponding
* mem_map entry.
*/
#define virt_to_page(kaddr) \
(ADDR_TO_MAPBASE(kaddr) + LOCAL_MAP_NR(kaddr))
/*
* Didn't find the best way to validate a page pointer yet...
*/
#define VALID_PAGE(page) (1)
|
