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 15 #ifdef CONFIG_NUMA 16 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> 22 23 #include <asm/mmzone.h> 24 25 #define NUMA_NO_NODE -1 26 27 extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned; 28 extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned; 29 extern pg_data_t *pgdat_list[MAX_NUMNODES]; 30 31 /* Stuff below this line could be architecture independent */ 32 33 extern int num_node_memblks; /* total number of memory chunks */ 34 35 /* 36 * List of node memory chunks. Filled when parsing SRAT table to 37 * obtain information about memory nodes. 38 */ 39 40 struct node_memblk_s { 41 unsigned long start_paddr; 42 unsigned long size; 43 int nid; /* which logical node contains this chunk? */ 44 int bank; /* which mem bank on this node */ 45 }; 46 47 struct node_cpuid_s { 48 u16 phys_id; /* id << 8 | eid */ 49 int nid; /* logical node containing this CPU */ 50 }; 51 52 extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS]; 53 extern struct node_cpuid_s node_cpuid[NR_CPUS]; 54 55 /* 56 * ACPI 2.0 SLIT (System Locality Information Table) 57 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf 58 * 59 * This is a matrix with "distances" between nodes, they should be 60 * proportional to the memory access latency ratios. 61 */ 62 63 extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES]; 64 #define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)]) 65 66 extern int paddr_to_nid(unsigned long paddr); 67 68 #define local_nodeid (cpu_to_node_map[smp_processor_id()]) 69 70 extern void map_cpu_to_node(int cpu, int nid); 71 extern void unmap_cpu_from_node(int cpu, int nid); 72 73 74 #else /* !CONFIG_NUMA */ 75 #define map_cpu_to_node(cpu, nid) do{}while(0) 76 #define unmap_cpu_from_node(cpu, nid) do{}while(0) 77 78 #define paddr_to_nid(addr) 0 79 80 #endif /* CONFIG_NUMA */ 81 82 #endif /* _ASM_IA64_NUMA_H */ 83