processor_core.c revision 11130736c99c37e253f45b2d3fd30b07313f83c6
147817254b8637b56730aec26eed2c337d3938bb5Alex Chiang/* 247817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * Copyright (C) 2005 Intel Corporation 347817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * Copyright (C) 2009 Hewlett-Packard Development Company, L.P. 447817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * 547817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * Alex Chiang <achiang@hp.com> 647817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * - Unified x86/ia64 implementations 747817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> 847817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * - Added _PDC for platforms with Intel CPUs 947817254b8637b56730aec26eed2c337d3938bb5Alex Chiang */ 1078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include <linux/dmi.h> 1178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 1278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include <acpi/acpi_drivers.h> 1378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include <acpi/processor.h> 1478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 1578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include "internal.h" 1678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 1778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#define PREFIX "ACPI: " 1878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#define _COMPONENT ACPI_PROCESSOR_COMPONENT 194d5d4cd88c542ff56cf7feacd29cc907f2abbfbbAlex ChiangACPI_MODULE_NAME("processor_core"); 2078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 2178f1699659963fff97975df44db6d5dbe7218e55Alex Chiangstatic int set_no_mwait(const struct dmi_system_id *id) 2278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 2378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang printk(KERN_NOTICE PREFIX "%s detected - " 2478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang "disabling mwait for CPU C-states\n", id->ident); 2578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang idle_nomwait = 1; 2678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang return 0; 2778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 2878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 2978f1699659963fff97975df44db6d5dbe7218e55Alex Chiangstatic struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = { 3078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang { 3178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang set_no_mwait, "IFL91 board", { 3278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), 3378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"), 3478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"), 3578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL}, 3678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang { 3778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang set_no_mwait, "Extensa 5220", { 3878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), 3978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 4078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), 4178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, 4278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang {}, 4378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang}; 4478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 4578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang#ifdef CONFIG_SMP 4678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangstatic struct acpi_table_madt *madt; 4778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 4878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangstatic int map_lapic_id(struct acpi_subtable_header *entry, 4978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang u32 acpi_id, int *apic_id) 5078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 5178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_madt_local_apic *lapic = 5278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang (struct acpi_madt_local_apic *)entry; 5311130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang 5411130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang if (!(lapic->lapic_flags & ACPI_MADT_ENABLED)) 5511130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang return 0; 5611130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang 5711130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang if (lapic->processor_id != acpi_id) 5811130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang return 0; 5911130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang 6011130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang *apic_id = lapic->id; 6111130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang return 1; 6278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 6378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 6478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangstatic int map_x2apic_id(struct acpi_subtable_header *entry, 6578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int device_declaration, u32 acpi_id, int *apic_id) 6678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 6778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_madt_local_x2apic *apic = 6878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang (struct acpi_madt_local_x2apic *)entry; 6978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang u32 tmp = apic->local_apic_id; 7078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 7178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang /* Only check enabled APICs*/ 7278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (!(apic->lapic_flags & ACPI_MADT_ENABLED)) 7378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return 0; 7478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 7578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang /* Device statement declaration type */ 7678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (device_declaration) { 7778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (apic->uid == acpi_id) 7878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang goto found; 7978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 8078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 8178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return 0; 8278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangfound: 8378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang *apic_id = tmp; 8478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return 1; 8578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 8678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 8778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangstatic int map_lsapic_id(struct acpi_subtable_header *entry, 8878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int device_declaration, u32 acpi_id, int *apic_id) 8978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 9078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_madt_local_sapic *lsapic = 9178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang (struct acpi_madt_local_sapic *)entry; 9278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang u32 tmp = (lsapic->id << 8) | lsapic->eid; 9378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 9478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang /* Only check enabled APICs*/ 9578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED)) 9678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return 0; 9778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 9878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang /* Device statement declaration type */ 9978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (device_declaration) { 10078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (entry->length < 16) 10178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang printk(KERN_ERR PREFIX 10278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n", 10378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang tmp); 10478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang else if (lsapic->uid == acpi_id) 10578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang goto found; 10678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang /* Processor statement declaration type */ 10778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } else if (lsapic->processor_id == acpi_id) 10878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang goto found; 10978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 11078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return 0; 11178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangfound: 11278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang *apic_id = tmp; 11378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return 1; 11478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 11578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 11678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangstatic int map_madt_entry(int type, u32 acpi_id) 11778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 11878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang unsigned long madt_end, entry; 11978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int apic_id = -1; 12078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 12178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (!madt) 12278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return apic_id; 12378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 12478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang entry = (unsigned long)madt; 12578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang madt_end = entry + madt->header.length; 12678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 12778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang /* Parse all entries looking for a match. */ 12878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 12978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang entry += sizeof(struct acpi_table_madt); 13078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang while (entry + sizeof(struct acpi_subtable_header) < madt_end) { 13178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_subtable_header *header = 13278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang (struct acpi_subtable_header *)entry; 13378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { 13478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (map_lapic_id(header, acpi_id, &apic_id)) 13578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang break; 13678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) { 13778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (map_x2apic_id(header, type, acpi_id, &apic_id)) 13878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang break; 13978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { 14078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (map_lsapic_id(header, type, acpi_id, &apic_id)) 14178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang break; 14278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 14378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang entry += header->length; 14478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 14578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return apic_id; 14678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 14778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 14878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangstatic int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) 14978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 15078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 15178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang union acpi_object *obj; 15278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_subtable_header *header; 15378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int apic_id = -1; 15478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 15578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 15678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang goto exit; 15778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 15878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (!buffer.length || !buffer.pointer) 15978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang goto exit; 16078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 16178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang obj = buffer.pointer; 16278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (obj->type != ACPI_TYPE_BUFFER || 16378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang obj->buffer.length < sizeof(struct acpi_subtable_header)) { 16478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang goto exit; 16578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 16678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 16778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang header = (struct acpi_subtable_header *)obj->buffer.pointer; 16878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { 16978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang map_lapic_id(header, acpi_id, &apic_id); 17078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { 17178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang map_lsapic_id(header, type, acpi_id, &apic_id); 17278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 17378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 17478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangexit: 17578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (buffer.pointer) 17678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang kfree(buffer.pointer); 17778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return apic_id; 17878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 17978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 18078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangint acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) 18178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 18278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int i; 18378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int apic_id = -1; 18478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 18578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang apic_id = map_mat_entry(handle, type, acpi_id); 18678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (apic_id == -1) 18778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang apic_id = map_madt_entry(type, acpi_id); 18878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (apic_id == -1) 18978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return apic_id; 19078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 19178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang for_each_possible_cpu(i) { 19278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (cpu_physical_id(i) == apic_id) 19378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return i; 19478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 19578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return -1; 19678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 19778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex ChiangEXPORT_SYMBOL_GPL(acpi_get_cpuid); 19878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang#endif 19978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 2005d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiangstatic bool processor_physically_present(acpi_handle handle) 2015d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang{ 2025d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang int cpuid, type; 2035d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang u32 acpi_id; 2045d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_status status; 2055d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_object_type acpi_type; 2065d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang unsigned long long tmp; 2075d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang union acpi_object object = { 0 }; 2085d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; 2095d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2105d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang status = acpi_get_type(handle, &acpi_type); 2115d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (ACPI_FAILURE(status)) 2125d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2135d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2145d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang switch (acpi_type) { 2155d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang case ACPI_TYPE_PROCESSOR: 2165d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang status = acpi_evaluate_object(handle, NULL, NULL, &buffer); 2175d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (ACPI_FAILURE(status)) 2185d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2195d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_id = object.processor.proc_id; 2205d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang break; 2215d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang case ACPI_TYPE_DEVICE: 2225d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp); 2235d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (ACPI_FAILURE(status)) 2245d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2255d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_id = tmp; 2265d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang break; 2275d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang default: 2285d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2295d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang } 2305d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2315d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0; 2325d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang cpuid = acpi_get_cpuid(handle, type, acpi_id); 2335d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2345d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (cpuid == -1) 2355d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2365d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2375d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return true; 2385d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang} 23978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 24008ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiangstatic void acpi_set_pdc_bits(u32 *buf) 24108ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang{ 24208ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang buf[0] = ACPI_PDC_REVISION_ID; 24308ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang buf[1] = 1; 24408ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang 24508ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang /* Enable coordination with firmware's _TSD info */ 24608ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang buf[2] = ACPI_PDC_SMP_T_SWCOORD; 2476c5807d7bc7d051fce00863ffb98d36325501eb2Alex Chiang 2486c5807d7bc7d051fce00863ffb98d36325501eb2Alex Chiang /* Twiddle arch-specific bits needed for _PDC */ 2496c5807d7bc7d051fce00863ffb98d36325501eb2Alex Chiang arch_acpi_set_pdc_bits(buf); 25008ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang} 25108ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang 2523b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiangstatic struct acpi_object_list *acpi_processor_alloc_pdc(void) 253407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang{ 254407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang struct acpi_object_list *obj_list; 255407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang union acpi_object *obj; 256407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang u32 *buf; 257407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 258407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang /* allocate and initialize pdc. It will be used later. */ 259407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL); 260407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang if (!obj_list) { 261407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang printk(KERN_ERR "Memory allocation error\n"); 2623b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return NULL; 263407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang } 264407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 265407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL); 266407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang if (!obj) { 267407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang printk(KERN_ERR "Memory allocation error\n"); 268407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang kfree(obj_list); 2693b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return NULL; 270407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang } 271407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 272407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang buf = kmalloc(12, GFP_KERNEL); 273407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang if (!buf) { 274407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang printk(KERN_ERR "Memory allocation error\n"); 275407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang kfree(obj); 276407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang kfree(obj_list); 2773b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return NULL; 278407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang } 279407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 28008ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang acpi_set_pdc_bits(buf); 28108ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang 282407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj->type = ACPI_TYPE_BUFFER; 283407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj->buffer.length = 12; 284407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj->buffer.pointer = (u8 *) buf; 285407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj_list->count = 1; 286407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj_list->pointer = obj; 287407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 2883b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return obj_list; 289407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang} 290407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 29178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang/* 29278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * _PDC is required for a BIOS-OS handshake for most of the newer 29378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * ACPI processor features. 29478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang */ 295fa118564ed66f785f957d8230745b62e9244700dAlex Chiangstatic int 296fa118564ed66f785f957d8230745b62e9244700dAlex Chiangacpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in) 29778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 29878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang acpi_status status = AE_OK; 29978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 30078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang if (idle_nomwait) { 30178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang /* 30278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * If mwait is disabled for CPU C-states, the C2C3_FFH access 30378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * mode will be disabled in the parameter of _PDC object. 30478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * Of course C1_FFH access mode will also be disabled. 30578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang */ 30678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang union acpi_object *obj; 30778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang u32 *buffer = NULL; 30878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 30978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang obj = pdc_in->pointer; 31078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang buffer = (u32 *)(obj->buffer.pointer); 31178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); 31278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 31378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang } 314fa118564ed66f785f957d8230745b62e9244700dAlex Chiang status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL); 31578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 31678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang if (ACPI_FAILURE(status)) 31778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang ACPI_DEBUG_PRINT((ACPI_DB_INFO, 31878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang "Could not evaluate _PDC, using legacy perf. control.\n")); 31978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 32078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang return status; 32178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 32278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 32343bab25ced218385f7e6a076c2459ea008cfd2e1Alex Chiangvoid acpi_processor_set_pdc(acpi_handle handle) 32478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 3253b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang struct acpi_object_list *obj_list; 3263b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang 3271d9cb470a755409ce97c3376174b1e234bd20371Alex Chiang if (arch_has_acpi_pdc() == false) 3281d9cb470a755409ce97c3376174b1e234bd20371Alex Chiang return; 3291d9cb470a755409ce97c3376174b1e234bd20371Alex Chiang 3303b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang obj_list = acpi_processor_alloc_pdc(); 3313b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang if (!obj_list) 3323b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return; 3333b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang 33443bab25ced218385f7e6a076c2459ea008cfd2e1Alex Chiang acpi_processor_eval_pdc(handle, obj_list); 335b9c2db783456bcbce31e2482214cd337528db295Alex Chiang 336b9c2db783456bcbce31e2482214cd337528db295Alex Chiang kfree(obj_list->pointer->buffer.pointer); 337b9c2db783456bcbce31e2482214cd337528db295Alex Chiang kfree(obj_list->pointer); 338b9c2db783456bcbce31e2482214cd337528db295Alex Chiang kfree(obj_list); 33978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 34078f1699659963fff97975df44db6d5dbe7218e55Alex ChiangEXPORT_SYMBOL_GPL(acpi_processor_set_pdc); 34178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 34278f1699659963fff97975df44db6d5dbe7218e55Alex Chiangstatic acpi_status 34378f1699659963fff97975df44db6d5dbe7218e55Alex Chiangearly_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv) 34478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 3455d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (processor_physically_present(handle) == false) 3465d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return AE_OK; 3475d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 34843bab25ced218385f7e6a076c2459ea008cfd2e1Alex Chiang acpi_processor_set_pdc(handle); 34978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang return AE_OK; 35078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 35178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 3527a0b73a49ab56fb1e836675c00d6d0d2ba39a714Tony Luckvoid __init acpi_early_processor_set_pdc(void) 35378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 35478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 35578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang#ifdef CONFIG_SMP 35678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, 35778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang (struct acpi_table_header **)&madt))) 35878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang madt = NULL; 35978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang#endif 36078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 36178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang /* 36278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * Check whether the system is DMI table. If yes, OSPM 36378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * should not use mwait for CPU-states. 36478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang */ 36578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang dmi_check_system(processor_idle_dmi_table); 36678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 36778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT, 36878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang ACPI_UINT32_MAX, 36978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang early_init_pdc, NULL, NULL, NULL); 37078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 371