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 extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned; 26 extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned; 27 extern pg_data_t *pgdat_list[MAX_NUMNODES]; 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 slit_distance(from,to) (numa_slit[(from) * MAX_NUMNODES + (to)]) 63 extern int __node_distance(int from, int to); 64 #define node_distance(from,to) __node_distance(from, 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 #define numa_off 0 71 72 extern void map_cpu_to_node(int cpu, int nid); 73 extern void unmap_cpu_from_node(int cpu, int nid); 74 extern void numa_clear_node(int cpu); 75 76 #else /* !CONFIG_NUMA */ 77 #define map_cpu_to_node(cpu, nid) do{}while(0) 78 #define unmap_cpu_from_node(cpu, nid) do{}while(0) 79 #define paddr_to_nid(addr) 0 80 #define numa_clear_node(cpu) do { } while (0) 81 #endif /* CONFIG_NUMA */ 82 83 #endif /* _ASM_IA64_NUMA_H */ 84