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Diffstat (limited to 'include/asm-arm/arch-clps711x/memory.h')
-rw-r--r--include/asm-arm/arch-clps711x/memory.h53
1 files changed, 10 insertions, 43 deletions
diff --git a/include/asm-arm/arch-clps711x/memory.h b/include/asm-arm/arch-clps711x/memory.h
index c6e8dcf674de..42768cc8bfb4 100644
--- a/include/asm-arm/arch-clps711x/memory.h
+++ b/include/asm-arm/arch-clps711x/memory.h
@@ -62,7 +62,15 @@
62 * memory bank. For those systems, simply undefine CONFIG_DISCONTIGMEM. 62 * memory bank. For those systems, simply undefine CONFIG_DISCONTIGMEM.
63 */ 63 */
64 64
65#ifdef CONFIG_DISCONTIGMEM 65/*
66 * The PS7211 allows up to 256MB max per DRAM bank, but the EDB7211
67 * uses only one of the two banks (bank #1). However, even within
68 * bank #1, memory is discontiguous.
69 *
70 * The EDB7211 has two 8MB DRAM areas with 8MB of empty space between
71 * them, so we use 24 for the node max shift to get 16MB node sizes.
72 */
73
66/* 74/*
67 * Because of the wide memory address space between physical RAM banks on the 75 * Because of the wide memory address space between physical RAM banks on the
68 * SA1100, it's much more convenient to use Linux's NUMA support to implement 76 * SA1100, it's much more convenient to use Linux's NUMA support to implement
@@ -80,48 +88,7 @@
80 * node 2: 0xd0000000 - 0xd7ffffff 88 * node 2: 0xd0000000 - 0xd7ffffff
81 * node 3: 0xd8000000 - 0xdfffffff 89 * node 3: 0xd8000000 - 0xdfffffff
82 */ 90 */
83 91#define NODE_MEM_SIZE_BITS 24
84/*
85 * Given a kernel address, find the home node of the underlying memory.
86 */
87#define KVADDR_TO_NID(addr) \
88 (((unsigned long)(addr) - PAGE_OFFSET) >> NODE_MAX_MEM_SHIFT)
89
90/*
91 * Given a page frame number, convert it to a node id.
92 */
93#define PFN_TO_NID(pfn) \
94 (((pfn) - PHYS_PFN_OFFSET) >> (NODE_MAX_MEM_SHIFT - PAGE_SHIFT))
95
96/*
97 * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
98 * and returns the mem_map of that node.
99 */
100#define ADDR_TO_MAPBASE(kaddr) \
101 NODE_MEM_MAP(KVADDR_TO_NID((unsigned long)(kaddr)))
102
103#define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn))
104
105/*
106 * Given a kaddr, LOCAL_MAR_NR finds the owning node of the memory
107 * and returns the index corresponding to the appropriate page in the
108 * node's mem_map.
109 */
110#define LOCAL_MAP_NR(addr) \
111 (((unsigned long)(addr) & (NODE_MAX_MEM_SIZE - 1)) >> PAGE_SHIFT)
112
113/*
114 * The PS7211 allows up to 256MB max per DRAM bank, but the EDB7211
115 * uses only one of the two banks (bank #1). However, even within
116 * bank #1, memory is discontiguous.
117 *
118 * The EDB7211 has two 8MB DRAM areas with 8MB of empty space between
119 * them, so we use 24 for the node max shift to get 16MB node sizes.
120 */
121#define NODE_MAX_MEM_SHIFT 24
122#define NODE_MAX_MEM_SIZE (1<<NODE_MAX_MEM_SHIFT)
123
124#endif /* CONFIG_DISCONTIGMEM */
125 92
126#endif 93#endif
127 94