Linux Kernel  3.7.1
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meminit.h
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1 #ifndef meminit_h
2 #define meminit_h
3 
4 /*
5  * This file is subject to the terms and conditions of the GNU General Public
6  * License. See the file "COPYING" in the main directory of this archive
7  * for more details.
8  */
9 
10 
11 /*
12  * Entries defined so far:
13  * - boot param structure itself
14  * - memory map
15  * - initrd (optional)
16  * - command line string
17  * - kernel code & data
18  * - crash dumping code reserved region
19  * - Kernel memory map built from EFI memory map
20  * - ELF core header
21  * - xen start info if CONFIG_XEN
22  *
23  * More could be added if necessary
24  */
25 #define IA64_MAX_RSVD_REGIONS 9
26 
27 struct rsvd_region {
28  u64 start; /* virtual address of beginning of element */
29  u64 end; /* virtual address of end of element + 1 */
30 };
31 
33 extern int num_rsvd_regions;
34 
35 extern void find_memory (void);
36 extern void reserve_memory (void);
37 extern void find_initrd (void);
38 extern int filter_rsvd_memory (u64 start, u64 end, void *arg);
39 extern int filter_memory (u64 start, u64 end, void *arg);
40 extern unsigned long efi_memmap_init(u64 *s, u64 *e);
41 extern int find_max_min_low_pfn (u64, u64, void *);
42 
43 extern unsigned long vmcore_find_descriptor_size(unsigned long address);
44 extern int reserve_elfcorehdr(u64 *start, u64 *end);
45 
46 /*
47  * For rounding an address to the next IA64_GRANULE_SIZE or order
48  */
49 #define GRANULEROUNDDOWN(n) ((n) & ~(IA64_GRANULE_SIZE-1))
50 #define GRANULEROUNDUP(n) (((n)+IA64_GRANULE_SIZE-1) & ~(IA64_GRANULE_SIZE-1))
51 
52 #ifdef CONFIG_NUMA
53  extern void call_pernode_memory (unsigned long start, unsigned long len, void *func);
54 #else
55 # define call_pernode_memory(start, len, func) (*func)(start, len, 0)
56 #endif
57 
58 #define IGNORE_PFN0 1 /* XXX fix me: ignore pfn 0 until TLB miss handler is updated... */
59 
60 extern int register_active_ranges(u64 start, u64 len, int nid);
61 
62 #ifdef CONFIG_VIRTUAL_MEM_MAP
63 # define LARGE_GAP 0x40000000 /* Use virtual mem map if hole is > than this */
64  extern unsigned long VMALLOC_END;
65  extern struct page *vmem_map;
66  extern int find_largest_hole(u64 start, u64 end, void *arg);
67  extern int create_mem_map_page_table(u64 start, u64 end, void *arg);
68  extern int vmemmap_find_next_valid_pfn(int, int);
69 #else
70 static inline int vmemmap_find_next_valid_pfn(int node, int i)
71 {
72  return i + 1;
73 }
74 #endif
75 #endif /* meminit_h */