2 * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
6 #ifndef ASM_X86__MMZONE_32_H
7 #define ASM_X86__MMZONE_32_H
12 extern struct pglist_data *node_data[];
13 #define NODE_DATA(nid) (node_data[nid])
15 #include <asm/numaq.h>
16 /* summit or generic arch */
19 extern int get_memcfg_numa_flat(void);
21 * This allows any one NUMA architecture to be compiled
22 * for, and still fall back to the flat function if it
25 static inline void get_memcfg_numa(void)
28 if (get_memcfg_numaq())
30 if (get_memcfg_from_srat())
32 get_memcfg_numa_flat();
35 extern int early_pfn_to_nid(unsigned long pfn);
37 #else /* !CONFIG_NUMA */
39 #define get_memcfg_numa get_memcfg_numa_flat
41 #endif /* CONFIG_NUMA */
43 #ifdef CONFIG_DISCONTIGMEM
46 * generic node memory support, the following assumptions apply:
48 * 1) memory comes in 64Mb contigious chunks which are either present or not
49 * 2) we will not have more than 64Gb in total
51 * for now assume that 64Gb is max amount of RAM for whole system
52 * 64Gb / 4096bytes/page = 16777216 pages
54 #define MAX_NR_PAGES 16777216
55 #define MAX_ELEMENTS 1024
56 #define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
58 extern s8 physnode_map[];
60 static inline int pfn_to_nid(unsigned long pfn)
63 return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
70 * Following are macros that each numa implmentation must define.
73 #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
74 #define node_end_pfn(nid) \
76 pg_data_t *__pgdat = NODE_DATA(nid); \
77 __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
80 static inline int pfn_valid(int pfn)
82 int nid = pfn_to_nid(pfn);
85 return (pfn < node_end_pfn(nid));
89 #endif /* CONFIG_DISCONTIGMEM */
91 #ifdef CONFIG_NEED_MULTIPLE_NODES
94 * Following are macros that are specific to this numa platform.
96 #define reserve_bootmem(addr, size, flags) \
97 reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags))
98 #define alloc_bootmem(x) \
99 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
100 #define alloc_bootmem_nopanic(x) \
101 __alloc_bootmem_node_nopanic(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
102 __pa(MAX_DMA_ADDRESS))
103 #define alloc_bootmem_low(x) \
104 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
105 #define alloc_bootmem_pages(x) \
106 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
107 #define alloc_bootmem_pages_nopanic(x) \
108 __alloc_bootmem_node_nopanic(NODE_DATA(0), (x), PAGE_SIZE, \
109 __pa(MAX_DMA_ADDRESS))
110 #define alloc_bootmem_low_pages(x) \
111 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
112 #define alloc_bootmem_node(pgdat, x) \
114 struct pglist_data __maybe_unused \
115 *__alloc_bootmem_node__pgdat = (pgdat); \
116 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
117 __pa(MAX_DMA_ADDRESS)); \
119 #define alloc_bootmem_pages_node(pgdat, x) \
121 struct pglist_data __maybe_unused \
122 *__alloc_bootmem_node__pgdat = (pgdat); \
123 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \
124 __pa(MAX_DMA_ADDRESS)); \
126 #define alloc_bootmem_low_pages_node(pgdat, x) \
128 struct pglist_data __maybe_unused \
129 *__alloc_bootmem_node__pgdat = (pgdat); \
130 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \
132 #endif /* CONFIG_NEED_MULTIPLE_NODES */
134 #endif /* ASM_X86__MMZONE_32_H */