| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * This file contains NUMA specific prototypes and definitions. |
| * |
| * 2002/08/05 Erich Focht <efocht@ess.nec.de> |
| * |
| */ |
| #ifndef _ASM_IA64_NUMA_H |
| #define _ASM_IA64_NUMA_H |
| |
| |
| #ifdef CONFIG_NUMA |
| |
| #include <linux/cache.h> |
| #include <linux/cpumask.h> |
| #include <linux/numa.h> |
| #include <linux/smp.h> |
| #include <linux/threads.h> |
| |
| #include <asm/mmzone.h> |
| |
| extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned; |
| extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned; |
| |
| /* Stuff below this line could be architecture independent */ |
| |
| extern int num_node_memblks; /* total number of memory chunks */ |
| |
| /* |
| * List of node memory chunks. Filled when parsing SRAT table to |
| * obtain information about memory nodes. |
| */ |
| |
| struct node_memblk_s { |
| unsigned long start_paddr; |
| unsigned long size; |
| int nid; /* which logical node contains this chunk? */ |
| int bank; /* which mem bank on this node */ |
| }; |
| |
| struct node_cpuid_s { |
| u16 phys_id; /* id << 8 | eid */ |
| int nid; /* logical node containing this CPU */ |
| }; |
| |
| extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS]; |
| extern struct node_cpuid_s node_cpuid[NR_CPUS]; |
| |
| /* |
| * ACPI 2.0 SLIT (System Locality Information Table) |
| * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf |
| * |
| * This is a matrix with "distances" between nodes, they should be |
| * proportional to the memory access latency ratios. |
| */ |
| |
| extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES]; |
| #define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)]) |
| |
| extern int paddr_to_nid(unsigned long paddr); |
| |
| #define local_nodeid (cpu_to_node_map[smp_processor_id()]) |
| |
| extern void map_cpu_to_node(int cpu, int nid); |
| extern void unmap_cpu_from_node(int cpu, int nid); |
| |
| |
| #else /* !CONFIG_NUMA */ |
| #define map_cpu_to_node(cpu, nid) do{}while(0) |
| #define unmap_cpu_from_node(cpu, nid) do{}while(0) |
| |
| #define paddr_to_nid(addr) 0 |
| |
| #endif /* CONFIG_NUMA */ |
| |
| #endif /* _ASM_IA64_NUMA_H */ |