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Diffstat (limited to 'kernel/arch/ia64/include/asm/numa.h')
| -rw-r--r-- | kernel/arch/ia64/include/asm/numa.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/kernel/arch/ia64/include/asm/numa.h b/kernel/arch/ia64/include/asm/numa.h new file mode 100644 index 000000000..2db0a6c6d --- /dev/null +++ b/kernel/arch/ia64/include/asm/numa.h @@ -0,0 +1,79 @@ +/* + * 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; +extern pg_data_t *pgdat_list[MAX_NUMNODES]; + +/* 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) * MAX_NUMNODES + (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); +extern void numa_clear_node(int cpu); + +#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 +#define numa_clear_node(cpu) do { } while (0) +#endif /* CONFIG_NUMA */ + +#endif /* _ASM_IA64_NUMA_H */ |