2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * This file contains NUMA specific prototypes and definitions.
8 * 2002/08/05 Erich Focht <efocht@ess.nec.de>
11 #ifndef _ASM_IA64_NUMA_H
12 #define _ASM_IA64_NUMA_H
17 #include <linux/cache.h>
18 #include <linux/cpumask.h>
19 #include <linux/numa.h>
20 #include <linux/smp.h>
21 #include <linux/threads.h>
23 #include <asm/mmzone.h>
25 extern u16 cpu_to_node_map
[NR_CPUS
] __cacheline_aligned
;
26 extern cpumask_t node_to_cpu_mask
[MAX_NUMNODES
] __cacheline_aligned
;
28 /* Stuff below this line could be architecture independent */
30 extern int num_node_memblks
; /* total number of memory chunks */
33 * List of node memory chunks. Filled when parsing SRAT table to
34 * obtain information about memory nodes.
37 struct node_memblk_s
{
38 unsigned long start_paddr
;
40 int nid
; /* which logical node contains this chunk? */
41 int bank
; /* which mem bank on this node */
45 u16 phys_id
; /* id << 8 | eid */
46 int nid
; /* logical node containing this CPU */
49 extern struct node_memblk_s node_memblk
[NR_NODE_MEMBLKS
];
50 extern struct node_cpuid_s node_cpuid
[NR_CPUS
];
53 * ACPI 2.0 SLIT (System Locality Information Table)
54 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
56 * This is a matrix with "distances" between nodes, they should be
57 * proportional to the memory access latency ratios.
60 extern u8 numa_slit
[MAX_NUMNODES
* MAX_NUMNODES
];
61 #define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)])
63 extern int paddr_to_nid(unsigned long paddr
);
65 #define local_nodeid (cpu_to_node_map[smp_processor_id()])
67 extern void map_cpu_to_node(int cpu
, int nid
);
68 extern void unmap_cpu_from_node(int cpu
, int nid
);
71 #else /* !CONFIG_NUMA */
73 #define paddr_to_nid(addr) 0
75 #endif /* CONFIG_NUMA */
77 #endif /* _ASM_IA64_NUMA_H */