projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 variables and functions which can | |
| 7 | * be split away from DISCONTIGMEM and are used on NUMA machines with | |
| 8 | * contiguous memory. | |
| 9 | * 2002/08/07 Erich Focht <efocht@ess.nec.de> | |
| 10 | * Populate cpu entries in sysfs for non-numa systems as well | |
| 11 | * Intel Corporation - Ashok Raj | |
| 12 | */ | |
| 13 | ||
| 14 | #include <linux/config.h> | |
| 15 | #include <linux/cpu.h> | |
| 16 | #include <linux/kernel.h> | |
| 17 | #include <linux/mm.h> | |
| 18 | #include <linux/node.h> | |
| 19 | #include <linux/init.h> | |
| 20 | #include <linux/bootmem.h> | |
| 21 | #include <linux/nodemask.h> | |
| 22 | #include <asm/mmzone.h> | |
| 23 | #include <asm/numa.h> | |
| 24 | #include <asm/cpu.h> | |
| 25 | ||
| 26 | #ifdef CONFIG_NUMA | |
| 27 | static struct node *sysfs_nodes; | |
| 28 | #endif | |
| 29 | static struct ia64_cpu *sysfs_cpus; | |
| 30 | ||
| 31 | int arch_register_cpu(int num) | |
| 32 | { | |
| 33 | struct node *parent = NULL; | |
| 34 | ||
| 35 | #ifdef CONFIG_NUMA | |
| 36 | parent = &sysfs_nodes[cpu_to_node(num)]; | |
| 37 | #endif /* CONFIG_NUMA */ | |
| 38 | ||
| 888ba6c6 | 39 | #ifdef CONFIG_ACPI |
| 55e59c51 AR |
40 | /* |
| 41 | * If CPEI cannot be re-targetted, and this is | |
| 42 | * CPEI target, then dont create the control file | |
| 43 | */ | |
| 44 | if (!can_cpei_retarget() && is_cpu_cpei_target(num)) | |
| 45 | sysfs_cpus[num].cpu.no_control = 1; | |
| 46906c44 | 46 | #endif |
| 55e59c51 | 47 | |
| 1da177e4 LT |
48 | return register_cpu(&sysfs_cpus[num].cpu, num, parent); |
| 49 | } | |
| 50 | ||
| 51 | #ifdef CONFIG_HOTPLUG_CPU | |
| 52 | ||
| 53 | void arch_unregister_cpu(int num) | |
| 54 | { | |
| 55 | struct node *parent = NULL; | |
| 56 | ||
| 57 | #ifdef CONFIG_NUMA | |
| 58 | int node = cpu_to_node(num); | |
| 59 | parent = &sysfs_nodes[node]; | |
| 60 | #endif /* CONFIG_NUMA */ | |
| 61 | ||
| 62 | return unregister_cpu(&sysfs_cpus[num].cpu, parent); | |
| 63 | } | |
| 64 | EXPORT_SYMBOL(arch_register_cpu); | |
| 65 | EXPORT_SYMBOL(arch_unregister_cpu); | |
| 66 | #endif /*CONFIG_HOTPLUG_CPU*/ | |
| 67 | ||
| 68 | ||
| 69 | static int __init topology_init(void) | |
| 70 | { | |
| 71 | int i, err = 0; | |
| 72 | ||
| 73 | #ifdef CONFIG_NUMA | |
| 74 | sysfs_nodes = kmalloc(sizeof(struct node) * MAX_NUMNODES, GFP_KERNEL); | |
| 75 | if (!sysfs_nodes) { | |
| 76 | err = -ENOMEM; | |
| 77 | goto out; | |
| 78 | } | |
| 79 | memset(sysfs_nodes, 0, sizeof(struct node) * MAX_NUMNODES); | |
| 80 | ||
| 81 | /* MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes? */ | |
| 82 | for_each_online_node(i) | |
| 83 | if ((err = register_node(&sysfs_nodes[i], i, 0))) | |
| 84 | goto out; | |
| 85 | #endif | |
| 86 | ||
| 87 | sysfs_cpus = kmalloc(sizeof(struct ia64_cpu) * NR_CPUS, GFP_KERNEL); | |
| 88 | if (!sysfs_cpus) { | |
| 89 | err = -ENOMEM; | |
| 90 | goto out; | |
| 91 | } | |
| 92 | memset(sysfs_cpus, 0, sizeof(struct ia64_cpu) * NR_CPUS); | |
| 93 | ||
| 94 | for_each_present_cpu(i) | |
| 95 | if((err = arch_register_cpu(i))) | |
| 96 | goto out; | |
| 97 | out: | |
| 98 | return err; | |
| 99 | } | |
| 100 | ||
| 101 | __initcall(topology_init); |