2 * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
12 extern struct pglist_data *node_data[];
13 #define NODE_DATA(nid) (node_data[nid])
15 #ifdef CONFIG_X86_NUMAQ
16 #include <asm/numaq.h>
17 #elif defined(CONFIG_ACPI_SRAT)/* summit or generic arch */
21 extern int get_memcfg_numa_flat(void);
23 * This allows any one NUMA architecture to be compiled
24 * for, and still fall back to the flat function if it
27 static inline void get_memcfg_numa(void)
29 #ifdef CONFIG_X86_NUMAQ
30 if (get_memcfg_numaq())
32 #elif defined(CONFIG_ACPI_SRAT)
33 if (get_memcfg_from_srat())
37 get_memcfg_numa_flat();
40 extern int early_pfn_to_nid(unsigned long pfn);
42 #else /* !CONFIG_NUMA */
44 #define get_memcfg_numa get_memcfg_numa_flat
45 #define get_zholes_size(n) (0)
47 #endif /* CONFIG_NUMA */
49 #ifdef CONFIG_DISCONTIGMEM
52 * generic node memory support, the following assumptions apply:
54 * 1) memory comes in 256Mb contigious chunks which are either present or not
55 * 2) we will not have more than 64Gb in total
57 * for now assume that 64Gb is max amount of RAM for whole system
58 * 64Gb / 4096bytes/page = 16777216 pages
60 #define MAX_NR_PAGES 16777216
61 #define MAX_ELEMENTS 256
62 #define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
64 extern s8 physnode_map[];
66 static inline int pfn_to_nid(unsigned long pfn)
69 return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
76 * Following are macros that each numa implmentation must define.
79 #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
80 #define node_end_pfn(nid) \
82 pg_data_t *__pgdat = NODE_DATA(nid); \
83 __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
86 #ifdef CONFIG_X86_NUMAQ /* we have contiguous memory on NUMA-Q */
87 #define pfn_valid(pfn) ((pfn) < num_physpages)
89 static inline int pfn_valid(int pfn)
91 int nid = pfn_to_nid(pfn);
94 return (pfn < node_end_pfn(nid));
97 #endif /* CONFIG_X86_NUMAQ */
99 #endif /* CONFIG_DISCONTIGMEM */
101 #ifdef CONFIG_NEED_MULTIPLE_NODES
104 * Following are macros that are specific to this numa platform.
106 #define reserve_bootmem(addr, size, flags) \
107 reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags))
108 #define alloc_bootmem(x) \
109 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
110 #define alloc_bootmem_low(x) \
111 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
112 #define alloc_bootmem_pages(x) \
113 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
114 #define alloc_bootmem_low_pages(x) \
115 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
116 #define alloc_bootmem_node(pgdat, x) \
118 struct pglist_data __maybe_unused \
119 *__alloc_bootmem_node__pgdat = (pgdat); \
120 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
121 __pa(MAX_DMA_ADDRESS)); \
123 #define alloc_bootmem_pages_node(pgdat, x) \
125 struct pglist_data __maybe_unused \
126 *__alloc_bootmem_node__pgdat = (pgdat); \
127 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \
128 __pa(MAX_DMA_ADDRESS)); \
130 #define alloc_bootmem_low_pages_node(pgdat, x) \
132 struct pglist_data __maybe_unused \
133 *__alloc_bootmem_node__pgdat = (pgdat); \
134 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \
136 #endif /* CONFIG_NEED_MULTIPLE_NODES */
138 #endif /* _ASM_MMZONE_H_ */