linux-imx

/*

 * acpi_processor.c - ACPI processor enumeration support

 *

 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>

 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>

 * Copyright (C) 2004       Dominik Brodowski <linux@brodo.de>

 * Copyright (C) 2004  Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>

 * Copyright (C) 2013, Intel Corporation

 *                     Rafael J. Wysocki <rafael.j.wysocki@intel.com>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 as published

 * by the Free Software Foundation.

 */

​

#include <linux/acpi.h>

#include <linux/device.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/pci.h>

​

#include <acpi/processor.h>

​

#include <asm/cpu.h>

​

#include "internal.h"

​

#define _COMPONENT  ACPI_PROCESSOR_COMPONENT

​

ACPI_MODULE_NAME("processor");

​

DEFINE_PER_CPU(struct acpi_processor *, processors);

EXPORT_PER_CPU_SYMBOL(processors);

​

/* --------------------------------------------------------------------------

                                Errata Handling

   -------------------------------------------------------------------------- */

​

struct acpi_processor_errata errata __read_mostly;

EXPORT_SYMBOL_GPL(errata);

​

static int acpi_processor_errata_piix4(struct pci_dev *dev)

{

    u8 value1 = 0;

    u8 value2 = 0;

​

​

    if (!dev)

        return -EINVAL;

​

    /*

     * Note that 'dev' references the PIIX4 ACPI Controller.

     */

​

    switch (dev->revision) {

    case 0:

        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n"));

        break;

    case 1:

        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n"));

        break;

    case 2:

        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n"));