diff options
Diffstat (limited to 'drivers/acpi/numa.c')
| -rw-r--r-- | drivers/acpi/numa.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c new file mode 100644 index 000000000000..a82834b32752 --- /dev/null +++ b/drivers/acpi/numa.c @@ -0,0 +1,213 @@ +/* + * acpi_numa.c - ACPI NUMA support + * + * Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com> + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + */ +#include <linux/module.h> +#include <linux/config.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/acpi.h> +#include <acpi/acpi_bus.h> +#include <acpi/acmacros.h> + +#define ACPI_NUMA 0x80000000 +#define _COMPONENT ACPI_NUMA + ACPI_MODULE_NAME ("numa") + +extern int __init acpi_table_parse_madt_family (enum acpi_table_id id, unsigned long madt_size, int entry_id, acpi_madt_entry_handler handler, unsigned int max_entries); + +void __init +acpi_table_print_srat_entry ( + acpi_table_entry_header *header) +{ + + ACPI_FUNCTION_NAME ("acpi_table_print_srat_entry"); + + if (!header) + return; + + switch (header->type) { + + case ACPI_SRAT_PROCESSOR_AFFINITY: +#ifdef ACPI_DEBUG_OUTPUT + { + struct acpi_table_processor_affinity *p = + (struct acpi_table_processor_affinity*) header; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n", + p->apic_id, p->lsapic_eid, p->proximity_domain, + p->flags.enabled?"enabled":"disabled")); + } +#endif /* ACPI_DEBUG_OUTPUT */ + break; + + case ACPI_SRAT_MEMORY_AFFINITY: +#ifdef ACPI_DEBUG_OUTPUT + { + struct acpi_table_memory_affinity *p = + (struct acpi_table_memory_affinity*) header; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "SRAT Memory (0x%08x%08x length 0x%08x%08x type 0x%x) in proximity domain %d %s%s\n", + p->base_addr_hi, p->base_addr_lo, p->length_hi, p->length_lo, + p->memory_type, p->proximity_domain, + p->flags.enabled ? "enabled" : "disabled", + p->flags.hot_pluggable ? " hot-pluggable" : "")); + } +#endif /* ACPI_DEBUG_OUTPUT */ + break; + + default: + printk(KERN_WARNING PREFIX "Found unsupported SRAT entry (type = 0x%x)\n", + header->type); + break; + } +} + + +static int __init +acpi_parse_slit (unsigned long phys_addr, unsigned long size) +{ + struct acpi_table_slit *slit; + u32 localities; + + if (!phys_addr || !size) + return -EINVAL; + + slit = (struct acpi_table_slit *) __va(phys_addr); + + /* downcast just for %llu vs %lu for i386/ia64 */ + localities = (u32) slit->localities; + + acpi_numa_slit_init(slit); + + return 0; +} + + +static int __init +acpi_parse_processor_affinity ( + acpi_table_entry_header *header, + const unsigned long end) +{ + struct acpi_table_processor_affinity *processor_affinity; + + processor_affinity = (struct acpi_table_processor_affinity*) header; + if (!processor_affinity) + return -EINVAL; + + acpi_table_print_srat_entry(header); + + /* let architecture-dependent part to do it */ + acpi_numa_processor_affinity_init(processor_affinity); + + return 0; +} + + +static int __init +acpi_parse_memory_affinity ( + acpi_table_entry_header *header, + const unsigned long end) +{ + struct acpi_table_memory_affinity *memory_affinity; + + memory_affinity = (struct acpi_table_memory_affinity*) header; + if (!memory_affinity) + return -EINVAL; + + acpi_table_print_srat_entry(header); + + /* let architecture-dependent part to do it */ + acpi_numa_memory_affinity_init(memory_affinity); + + return 0; +} + + +static int __init +acpi_parse_srat (unsigned long phys_addr, unsigned long size) +{ + struct acpi_table_srat *srat; + + if (!phys_addr || !size) + return -EINVAL; + + srat = (struct acpi_table_srat *) __va(phys_addr); + + return 0; +} + + +int __init +acpi_table_parse_srat ( + enum acpi_srat_entry_id id, + acpi_madt_entry_handler handler, + unsigned int max_entries) +{ + return acpi_table_parse_madt_family(ACPI_SRAT, sizeof(struct acpi_table_srat), + id, handler, max_entries); +} + + +int __init +acpi_numa_init(void) +{ + int result; + + /* SRAT: Static Resource Affinity Table */ + result = acpi_table_parse(ACPI_SRAT, acpi_parse_srat); + + if (result > 0) { + result = acpi_table_parse_srat(ACPI_SRAT_PROCESSOR_AFFINITY, + acpi_parse_processor_affinity, + NR_CPUS); + result = acpi_table_parse_srat(ACPI_SRAT_MEMORY_AFFINITY, + acpi_parse_memory_affinity, + NR_NODE_MEMBLKS); // IA64 specific + } + + /* SLIT: System Locality Information Table */ + result = acpi_table_parse(ACPI_SLIT, acpi_parse_slit); + + acpi_numa_arch_fixup(); + return 0; +} + +int +acpi_get_pxm(acpi_handle h) +{ + unsigned long pxm; + acpi_status status; + acpi_handle handle; + acpi_handle phandle = h; + + do { + handle = phandle; + status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); + if (ACPI_SUCCESS(status)) + return (int)pxm; + status = acpi_get_parent(handle, &phandle); + } while(ACPI_SUCCESS(status)); + return -1; +} +EXPORT_SYMBOL(acpi_get_pxm); |