| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 |
| 4 | * for more details. |
| 5 | * |
| 6 | * This file contains NUMA specific prototypes and definitions. |
| 7 | * |
| 8 | * 2002/08/05 Erich Focht <efocht@ess.nec.de> |
| 9 | * |
| 10 | */ |
| 11 | #ifndef _ASM_IA64_NUMA_H |
| 12 | #define _ASM_IA64_NUMA_H |
| 13 | |
| 14 | #include <linux/config.h> |
| 15 | |
| 16 | #ifdef CONFIG_NUMA |
| 17 | |
| 18 | #include <linux/cache.h> |
| 19 | #include <linux/cpumask.h> |
| 20 | #include <linux/numa.h> |
| 21 | #include <linux/smp.h> |
| 22 | #include <linux/threads.h> |
| 23 | |
| 24 | #include <asm/mmzone.h> |
| 25 | |
| 26 | extern u8 cpu_to_node_map[NR_CPUS] __cacheline_aligned; |
| 27 | extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned; |
| 28 | |
| 29 | /* Stuff below this line could be architecture independent */ |
| 30 | |
| 31 | extern int num_node_memblks; /* total number of memory chunks */ |
| 32 | |
| 33 | /* |
| 34 | * List of node memory chunks. Filled when parsing SRAT table to |
| 35 | * obtain information about memory nodes. |
| 36 | */ |
| 37 | |
| 38 | struct node_memblk_s { |
| 39 | unsigned long start_paddr; |
| 40 | unsigned long size; |
| 41 | int nid; /* which logical node contains this chunk? */ |
| 42 | int bank; /* which mem bank on this node */ |
| 43 | }; |
| 44 | |
| 45 | struct node_cpuid_s { |
| 46 | u16 phys_id; /* id << 8 | eid */ |
| 47 | int nid; /* logical node containing this CPU */ |
| 48 | }; |
| 49 | |
| 50 | extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS]; |
| 51 | extern struct node_cpuid_s node_cpuid[NR_CPUS]; |
| 52 | |
| 53 | /* |
| 54 | * ACPI 2.0 SLIT (System Locality Information Table) |
| 55 | * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf |
| 56 | * |
| 57 | * This is a matrix with "distances" between nodes, they should be |
| 58 | * proportional to the memory access latency ratios. |
| 59 | */ |
| 60 | |
| 61 | extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES]; |
| 62 | #define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)]) |
| 63 | |
| 64 | extern int paddr_to_nid(unsigned long paddr); |
| 65 | |
| 66 | #define local_nodeid (cpu_to_node_map[smp_processor_id()]) |
| 67 | |
| 68 | #else /* !CONFIG_NUMA */ |
| 69 | |
| 70 | #define paddr_to_nid(addr) 0 |
| 71 | |
| 72 | #endif /* CONFIG_NUMA */ |
| 73 | |
| 74 | #endif /* _ASM_IA64_NUMA_H */ |