fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-x86 / mmzone_32.h
blob118e9812778fd857f832632d2cbaa38a888cf9b0
1 /*
2 * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
4 */
6 #ifndef _ASM_MMZONE_H_
7 #define _ASM_MMZONE_H_
9 #include <asm/smp.h>
11 #ifdef CONFIG_NUMA
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 */
18 #include <asm/srat.h>
19 #endif
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
25 * fails.
27 static inline void get_memcfg_numa(void)
29 #ifdef CONFIG_X86_NUMAQ
30 if (get_memcfg_numaq())
31 return;
32 #elif defined(CONFIG_ACPI_SRAT)
33 if (get_memcfg_from_srat())
34 return;
35 #endif
37 get_memcfg_numa_flat();
40 extern int early_pfn_to_nid(unsigned long pfn);
41 extern void numa_kva_reserve(void);
43 #else /* !CONFIG_NUMA */
45 #define get_memcfg_numa get_memcfg_numa_flat
46 #define get_zholes_size(n) (0)
48 static inline void numa_kva_reserve(void)
51 #endif /* CONFIG_NUMA */
53 #ifdef CONFIG_DISCONTIGMEM
56 * generic node memory support, the following assumptions apply:
58 * 1) memory comes in 256Mb contigious chunks which are either present or not
59 * 2) we will not have more than 64Gb in total
61 * for now assume that 64Gb is max amount of RAM for whole system
62 * 64Gb / 4096bytes/page = 16777216 pages
64 #define MAX_NR_PAGES 16777216
65 #define MAX_ELEMENTS 256
66 #define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
68 extern s8 physnode_map[];
70 static inline int pfn_to_nid(unsigned long pfn)
72 #ifdef CONFIG_NUMA
73 return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
74 #else
75 return 0;
76 #endif
80 * Following are macros that each numa implmentation must define.
83 #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
84 #define node_end_pfn(nid) \
85 ({ \
86 pg_data_t *__pgdat = NODE_DATA(nid); \
87 __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
90 /* XXX: FIXME -- wli */
91 #define kern_addr_valid(kaddr) (0)
93 #ifdef CONFIG_X86_NUMAQ /* we have contiguous memory on NUMA-Q */
94 #define pfn_valid(pfn) ((pfn) < num_physpages)
95 #else
96 static inline int pfn_valid(int pfn)
98 int nid = pfn_to_nid(pfn);
100 if (nid >= 0)
101 return (pfn < node_end_pfn(nid));
102 return 0;
104 #endif /* CONFIG_X86_NUMAQ */
106 #endif /* CONFIG_DISCONTIGMEM */
108 #ifdef CONFIG_NEED_MULTIPLE_NODES
111 * Following are macros that are specific to this numa platform.
113 #define reserve_bootmem(addr, size) \
114 reserve_bootmem_node(NODE_DATA(0), (addr), (size))
115 #define alloc_bootmem(x) \
116 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
117 #define alloc_bootmem_low(x) \
118 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
119 #define alloc_bootmem_pages(x) \
120 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
121 #define alloc_bootmem_low_pages(x) \
122 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
123 #define alloc_bootmem_node(pgdat, x) \
124 ({ \
125 struct pglist_data __maybe_unused \
126 *__alloc_bootmem_node__pgdat = (pgdat); \
127 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
128 __pa(MAX_DMA_ADDRESS)); \
130 #define alloc_bootmem_pages_node(pgdat, x) \
131 ({ \
132 struct pglist_data __maybe_unused \
133 *__alloc_bootmem_node__pgdat = (pgdat); \
134 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \
135 __pa(MAX_DMA_ADDRESS)) \
137 #define alloc_bootmem_low_pages_node(pgdat, x) \
138 ({ \
139 struct pglist_data __maybe_unused \
140 *__alloc_bootmem_node__pgdat = (pgdat); \
141 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \
143 #endif /* CONFIG_NEED_MULTIPLE_NODES */
145 #endif /* _ASM_MMZONE_H_ */