ia64/linux-2.6.18-xen.hg

view include/asm-i386/mmzone.h @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
1 /*
2 * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
3 *
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 );
22 /*
23 * This allows any one NUMA architecture to be compiled
24 * for, and still fall back to the flat function if it
25 * fails.
26 */
27 static inline void get_memcfg_numa(void)
28 {
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();
38 }
40 extern int early_pfn_to_nid(unsigned long pfn);
42 #else /* !CONFIG_NUMA */
43 #define get_memcfg_numa get_memcfg_numa_flat
44 #define get_zholes_size(n) (0)
45 #endif /* CONFIG_NUMA */
47 #ifdef CONFIG_DISCONTIGMEM
49 /*
50 * generic node memory support, the following assumptions apply:
51 *
52 * 1) memory comes in 256Mb contigious chunks which are either present or not
53 * 2) we will not have more than 64Gb in total
54 *
55 * for now assume that 64Gb is max amount of RAM for whole system
56 * 64Gb / 4096bytes/page = 16777216 pages
57 */
58 #define MAX_NR_PAGES 16777216
59 #define MAX_ELEMENTS 256
60 #define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
62 extern s8 physnode_map[];
64 static inline int pfn_to_nid(unsigned long pfn)
65 {
66 #ifdef CONFIG_NUMA
67 return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
68 #else
69 return 0;
70 #endif
71 }
73 /*
74 * Following are macros that each numa implmentation must define.
75 */
77 #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
78 #define node_end_pfn(nid) \
79 ({ \
80 pg_data_t *__pgdat = NODE_DATA(nid); \
81 __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
82 })
84 /* XXX: FIXME -- wli */
85 #define kern_addr_valid(kaddr) (0)
87 #ifdef CONFIG_X86_NUMAQ /* we have contiguous memory on NUMA-Q */
88 #define pfn_valid(pfn) ((pfn) < num_physpages)
89 #else
90 static inline int pfn_valid(int pfn)
91 {
92 int nid = pfn_to_nid(pfn);
94 if (nid >= 0)
95 return (pfn < node_end_pfn(nid));
96 return 0;
97 }
98 #endif /* CONFIG_X86_NUMAQ */
100 #endif /* CONFIG_DISCONTIGMEM */
102 #ifdef CONFIG_NEED_MULTIPLE_NODES
104 /*
105 * Following are macros that are specific to this numa platform.
106 */
107 #define reserve_bootmem(addr, size) \
108 reserve_bootmem_node(NODE_DATA(0), (addr), (size))
109 #define alloc_bootmem(x) \
110 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
111 #define alloc_bootmem_low(x) \
112 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
113 #define alloc_bootmem_pages(x) \
114 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
115 #define alloc_bootmem_low_pages(x) \
116 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
117 #define alloc_bootmem_node(ignore, x) \
118 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
119 #define alloc_bootmem_pages_node(ignore, x) \
120 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
121 #define alloc_bootmem_low_pages_node(ignore, x) \
122 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
124 #endif /* CONFIG_NEED_MULTIPLE_NODES */
126 #endif /* _ASM_MMZONE_H_ */