utglobal.c

h内核

/******************************************************************************
 *
 * Module Name: utglobal - Global variables for the ACPI subsystem
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2005, R. Byron Moore
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#define DEFINE_ACPI_GLOBALS

#include <linux/module.h>

#include <acpi/acpi.h>
#include <acpi/acnamesp.h>

#define _COMPONENT          ACPI_UTILITIES
	 ACPI_MODULE_NAME    ("utglobal")


/******************************************************************************
 *
 * FUNCTION:    acpi_format_exception
 *
 * PARAMETERS:  Status       - The acpi_status code to be formatted
 *
 * RETURN:      A string containing the exception  text
 *
 * DESCRIPTION: This function translates an ACPI exception into an ASCII string.
 *
 ******************************************************************************/

const char *
acpi_format_exception (
	acpi_status                     status)
{
	const char                      *exception = "UNKNOWN_STATUS_CODE";
	acpi_status                     sub_status;


	ACPI_FUNCTION_NAME ("format_exception");


	sub_status = (status & ~AE_CODE_MASK);

	switch (status & AE_CODE_MASK) {
	case AE_CODE_ENVIRONMENTAL:

		if (sub_status <= AE_CODE_ENV_MAX) {
			exception = acpi_gbl_exception_names_env [sub_status];
			break;
		}
		goto unknown;

	case AE_CODE_PROGRAMMER:

		if (sub_status <= AE_CODE_PGM_MAX) {
			exception = acpi_gbl_exception_names_pgm [sub_status -1];
			break;
		}
		goto unknown;

	case AE_CODE_ACPI_TABLES:

		if (sub_status <= AE_CODE_TBL_MAX) {
			exception = acpi_gbl_exception_names_tbl [sub_status -1];
			break;
		}
		goto unknown;

	case AE_CODE_AML:

		if (sub_status <= AE_CODE_AML_MAX) {
			exception = acpi_gbl_exception_names_aml [sub_status -1];
			break;
		}
		goto unknown;

	case AE_CODE_CONTROL:

		if (sub_status <= AE_CODE_CTRL_MAX) {
			exception = acpi_gbl_exception_names_ctrl [sub_status -1];
			break;
		}
		goto unknown;

	default:
		goto unknown;
	}


	return ((const char *) exception);

unknown:

	ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown exception code: 0x%8.8X\n", status));
	return ((const char *) exception);
}


/******************************************************************************
 *
 * Static global variable initialization.
 *
 ******************************************************************************/

/*
 * We want the debug switches statically initialized so they
 * are already set when the debugger is entered.
 */

/* Debug switch - level and trace mask */
u32                                 acpi_dbg_level = ACPI_DEBUG_DEFAULT;
EXPORT_SYMBOL(acpi_dbg_level);

/* Debug switch - layer (component) mask */

u32                                 acpi_dbg_layer = ACPI_COMPONENT_DEFAULT | ACPI_ALL_DRIVERS;
EXPORT_SYMBOL(acpi_dbg_layer);
u32                                 acpi_gbl_nesting_level = 0;


/* Debugger globals */

u8                                  acpi_gbl_db_terminate_threads = FALSE;
u8                                  acpi_gbl_abort_method = FALSE;
u8                                  acpi_gbl_method_executing = FALSE;

/* System flags */

u32                                 acpi_gbl_startup_flags = 0;

/* System starts uninitialized */

u8                                  acpi_gbl_shutdown = TRUE;

const u8                            acpi_gbl_decode_to8bit [8] = {1,2,4,8,16,32,64,128};

const char                          *acpi_gbl_sleep_state_names[ACPI_S_STATE_COUNT] =
{
	"\\_S0_",
	"\\_S1_",
	"\\_S2_",
	"\\_S3_",
	"\\_S4_",
	"\\_S5_"
};

const char                          *acpi_gbl_highest_dstate_names[4] =
{
	"_S1D",
	"_S2D",
	"_S3D",
	"_S4D"
};

/*
 * Strings supported by the _OSI predefined (internal) method.
 * When adding strings, be sure to update ACPI_NUM_OSI_STRINGS.
 */
const char                          *acpi_gbl_valid_osi_strings[ACPI_NUM_OSI_STRINGS] =
{
	"Linux",
	"Windows 2000",
	"Windows 2001",
	"Windows 2001.1",
	"Windows 2001 SP0",
	"Windows 2001 SP1",
	"Windows 2001 SP2",
	"Windows 2001 SP3",
	"Windows 2001 SP4"
};


/******************************************************************************
 *
 * Namespace globals
 *
 ******************************************************************************/


/*
 * Predefined ACPI Names (Built-in to the Interpreter)
 *
 * NOTES:
 * 1) _SB_ is defined to be a device to allow \_SB_._INI to be run
 *    during the initialization sequence.
 * 2) _TZ_ is defined to be a thermal zone in order to allow ASL code to
 *    perform a Notify() operation on it.
 */
const struct acpi_predefined_names      acpi_gbl_pre_defined_names[] =
{ {"_GPE",    ACPI_TYPE_LOCAL_SCOPE,      NULL},
	{"_PR_",    ACPI_TYPE_LOCAL_SCOPE,      NULL},
	{"_SB_",    ACPI_TYPE_DEVICE,           NULL},
	{"_SI_",    ACPI_TYPE_LOCAL_SCOPE,      NULL},
	{"_TZ_",    ACPI_TYPE_THERMAL,          NULL},
	{"_REV",    ACPI_TYPE_INTEGER,          (char *) ACPI_CA_SUPPORT_LEVEL},
	{"_OS_",    ACPI_TYPE_STRING,           ACPI_OS_NAME},
	{"_GL_",    ACPI_TYPE_MUTEX,            (char *) 1},

#if !defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)
	{"_OSI",    ACPI_TYPE_METHOD,           (char *) 1},
#endif
	{NULL,      ACPI_TYPE_ANY,              NULL}              /* Table terminator */
};


/*
 * Properties of the ACPI Object Types, both internal and external.
 * The table is indexed by values of acpi_object_type
 */
const u8                                acpi_gbl_ns_properties[] =
{
	ACPI_NS_NORMAL,                     /* 00 Any              */
	ACPI_NS_NORMAL,                     /* 01 Number           */
	ACPI_NS_NORMAL,                     /* 02 String           */
	ACPI_NS_NORMAL,                     /* 03 Buffer           */
	ACPI_NS_NORMAL,                     /* 04 Package          */
	ACPI_NS_NORMAL,                     /* 05 field_unit       */
	ACPI_NS_NEWSCOPE,                   /* 06 Device           */
	ACPI_NS_NORMAL,                     /* 07 Event            */
	ACPI_NS_NEWSCOPE,                   /* 08 Method           */
	ACPI_NS_NORMAL,                     /* 09 Mutex            */
	ACPI_NS_NORMAL,                     /* 10 Region           */
	ACPI_NS_NEWSCOPE,                   /* 11 Power            */
	ACPI_NS_NEWSCOPE,                   /* 12 Processor        */
	ACPI_NS_NEWSCOPE,                   /* 13 Thermal          */
	ACPI_NS_NORMAL,                     /* 14 buffer_field     */
	ACPI_NS_NORMAL,                     /* 15 ddb_handle       */
	ACPI_NS_NORMAL,                     /* 16 Debug Object     */
	ACPI_NS_NORMAL,                     /* 17 def_field        */
	ACPI_NS_NORMAL,                     /* 18 bank_field       */
	ACPI_NS_NORMAL,                     /* 19 index_field      */
	ACPI_NS_NORMAL,                     /* 20 Reference        */
	ACPI_NS_NORMAL,                     /* 21 Alias            */
	ACPI_NS_NORMAL,                     /* 22 method_alias     */
	ACPI_NS_NORMAL,                     /* 23 Notify           */
	ACPI_NS_NORMAL,                     /* 24 Address Handler  */
	ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,   /* 25 Resource Desc    */
	ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,   /* 26 Resource Field   */
	ACPI_NS_NEWSCOPE,                   /* 27 Scope            */
	ACPI_NS_NORMAL,                     /* 28 Extra            */
	ACPI_NS_NORMAL,                     /* 29 Data             */
	ACPI_NS_NORMAL                      /* 30 Invalid          */
};


/* Hex to ASCII conversion table */

static const char                   acpi_gbl_hex_to_ascii[] =
			  {'0','1','2','3','4','5','6','7',
					 '8','9','A','B','C','D','E','F'};

/*****************************************************************************
 *
 * FUNCTION:    acpi_ut_hex_to_ascii_char
 *
 * PARAMETERS:  Integer             - Contains the hex digit
 *              Position            - bit position of the digit within the
 *                                    integer
 *
 * RETURN:      Ascii character
 *
 * DESCRIPTION: Convert a hex digit to an ascii character
 *
 ****************************************************************************/

char
acpi_ut_hex_to_ascii_char (
	acpi_integer                    integer,
	u32                             position)
{

	return (acpi_gbl_hex_to_ascii[(integer >> position) & 0xF]);
}


/******************************************************************************
 *
 * Table name globals
 *
 * NOTE: This table includes ONLY the ACPI tables that the subsystem consumes.
 * it is NOT an exhaustive list of all possible ACPI tables.  All ACPI tables
 * that are not used by the subsystem are simply ignored.
 *
 * Do NOT add any table to this list that is not consumed directly by this
 * subsystem.
 *
 ******************************************************************************/

struct acpi_table_list              acpi_gbl_table_lists[NUM_ACPI_TABLE_TYPES];

struct acpi_table_support           acpi_gbl_table_data[NUM_ACPI_TABLE_TYPES] =
{
	/***********    Name,   Signature, Global typed pointer     Signature size,      Type                  How many allowed?,    Contains valid AML? */

	/* RSDP 0 */ {RSDP_NAME, RSDP_SIG, NULL,                    sizeof (RSDP_SIG)-1, ACPI_TABLE_ROOT     | ACPI_TABLE_SINGLE},
	/* DSDT 1 */ {DSDT_SIG,  DSDT_SIG, (void *) &acpi_gbl_DSDT, sizeof (DSDT_SIG)-1, ACPI_TABLE_SECONDARY| ACPI_TABLE_SINGLE   | ACPI_TABLE_EXECUTABLE},
	/* FADT 2 */ {FADT_SIG,  FADT_SIG, (void *) &acpi_gbl_FADT, sizeof (FADT_SIG)-1, ACPI_TABLE_PRIMARY  | ACPI_TABLE_SINGLE},
	/* FACS 3 */ {FACS_SIG,  FACS_SIG, (void *) &acpi_gbl_FACS, sizeof (FACS_SIG)-1, ACPI_TABLE_SECONDARY| ACPI_TABLE_SINGLE},
	/* PSDT 4 */ {PSDT_SIG,  PSDT_SIG, NULL,                    sizeof (PSDT_SIG)-1, ACPI_TABLE_PRIMARY  | ACPI_TABLE_MULTIPLE | ACPI_TABLE_EXECUTABLE},
	/* SSDT 5 */ {SSDT_SIG,  SSDT_SIG, NULL,                    sizeof (SSDT_SIG)-1, ACPI_TABLE_PRIMARY  | ACPI_TABLE_MULTIPLE | ACPI_TABLE_EXECUTABLE},
	/* XSDT 6 */ {XSDT_SIG,  XSDT_SIG, NULL,                    sizeof (RSDT_SIG)-1, ACPI_TABLE_ROOT     | ACPI_TABLE_SINGLE},
};


/******************************************************************************
 *
 * Event and Hardware globals
 *
 ******************************************************************************/

struct acpi_bit_register_info       acpi_gbl_bit_register_info[ACPI_NUM_BITREG] =
{
	/* Name                                     Parent Register             Register Bit Position                   Register Bit Mask       */

	/* ACPI_BITREG_TIMER_STATUS         */   {ACPI_REGISTER_PM1_STATUS,   ACPI_BITPOSITION_TIMER_STATUS,          ACPI_BITMASK_TIMER_STATUS},
	/* ACPI_BITREG_BUS_MASTER_STATUS    */   {ACPI_REGISTER_PM1_STATUS,   ACPI_BITPOSITION_BUS_MASTER_STATUS,     ACPI_BITMASK_BUS_MASTER_STATUS},
	/* ACPI_BITREG_GLOBAL_LOCK_STATUS   */   {ACPI_REGISTER_PM1_STATUS,   ACPI_BITPOSITION_GLOBAL_LOCK_STATUS,    ACPI_BITMASK_GLOBAL_LOCK_STATUS},
	/* ACPI_BITREG_POWER_BUTTON_STATUS  */   {ACPI_REGISTER_PM1_STATUS,   ACPI_BITPOSITION_POWER_BUTTON_STATUS,   ACPI_BITMASK_POWER_BUTTON_STATUS},
	/* ACPI_BITREG_SLEEP_BUTTON_STATUS  */   {ACPI_REGISTER_PM1_STATUS,   ACPI_BITPOSITION_SLEEP_BUTTON_STATUS,   ACPI_BITMASK_SLEEP_BUTTON_STATUS},
	/* ACPI_BITREG_RT_CLOCK_STATUS      */   {ACPI_REGISTER_PM1_STATUS,   ACPI_BITPOSITION_RT_CLOCK_STATUS,       ACPI_BITMASK_RT_CLOCK_STATUS},
	/* ACPI_BITREG_WAKE_STATUS          */   {ACPI_REGISTER_PM1_STATUS,   ACPI_BITPOSITION_WAKE_STATUS,           ACPI_BITMASK_WAKE_STATUS},

	/* ACPI_BITREG_TIMER_ENABLE         */   {ACPI_REGISTER_PM1_ENABLE,   ACPI_BITPOSITION_TIMER_ENABLE,          ACPI_BITMASK_TIMER_ENABLE},
	/* ACPI_BITREG_GLOBAL_LOCK_ENABLE   */   {ACPI_REGISTER_PM1_ENABLE,   ACPI_BITPOSITION_GLOBAL_LOCK_ENABLE,    ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
	/* ACPI_BITREG_POWER_BUTTON_ENABLE  */   {ACPI_REGISTER_PM1_ENABLE,   ACPI_BITPOSITION_POWER_BUTTON_ENABLE,   ACPI_BITMASK_POWER_BUTTON_ENABLE},
	/* ACPI_BITREG_SLEEP_BUTTON_ENABLE  */   {ACPI_REGISTER_PM1_ENABLE,   ACPI_BITPOSITION_SLEEP_BUTTON_ENABLE,   ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
	/* ACPI_BITREG_RT_CLOCK_ENABLE      */   {ACPI_REGISTER_PM1_ENABLE,   ACPI_BITPOSITION_RT_CLOCK_ENABLE,       ACPI_BITMASK_RT_CLOCK_ENABLE},
	/* ACPI_BITREG_WAKE_ENABLE          */   {ACPI_REGISTER_PM1_ENABLE,   0,                                      0},

	/* ACPI_BITREG_SCI_ENABLE           */   {ACPI_REGISTER_PM1_CONTROL,  ACPI_BITPOSITION_SCI_ENABLE,            ACPI_BITMASK_SCI_ENABLE},
	/* ACPI_BITREG_BUS_MASTER_RLD       */   {ACPI_REGISTER_PM1_CONTROL,  ACPI_BITPOSITION_BUS_MASTER_RLD,        ACPI_BITMASK_BUS_MASTER_RLD},
	/* ACPI_BITREG_GLOBAL_LOCK_RELEASE  */   {ACPI_REGISTER_PM1_CONTROL,  ACPI_BITPOSITION_GLOBAL_LOCK_RELEASE,   ACPI_BITMASK_GLOBAL_LOCK_RELEASE},
	/* ACPI_BITREG_SLEEP_TYPE_A         */   {ACPI_REGISTER_PM1_CONTROL,  ACPI_BITPOSITION_SLEEP_TYPE_X,          ACPI_BITMASK_SLEEP_TYPE_X},
	/* ACPI_BITREG_SLEEP_TYPE_B         */   {ACPI_REGISTER_PM1_CONTROL,  ACPI_BITPOSITION_SLEEP_TYPE_X,          ACPI_BITMASK_SLEEP_TYPE_X},
	/* ACPI_BITREG_SLEEP_ENABLE         */   {ACPI_REGISTER_PM1_CONTROL,  ACPI_BITPOSITION_SLEEP_ENABLE,          ACPI_BITMASK_SLEEP_ENABLE},

	/* ACPI_BITREG_ARB_DIS              */   {ACPI_REGISTER_PM2_CONTROL,  ACPI_BITPOSITION_ARB_DISABLE,           ACPI_BITMASK_ARB_DISABLE}
};


struct acpi_fixed_event_info        acpi_gbl_fixed_event_info[ACPI_NUM_FIXED_EVENTS] =
{
	/* ACPI_EVENT_PMTIMER       */  {ACPI_BITREG_TIMER_STATUS,          ACPI_BITREG_TIMER_ENABLE,        ACPI_BITMASK_TIMER_STATUS,          ACPI_BITMASK_TIMER_ENABLE},
	/* ACPI_EVENT_GLOBAL        */  {ACPI_BITREG_GLOBAL_LOCK_STATUS,    ACPI_BITREG_GLOBAL_LOCK_ENABLE,  ACPI_BITMASK_GLOBAL_LOCK_STATUS,    ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
	/* ACPI_EVENT_POWER_BUTTON  */  {ACPI_BITREG_POWER_BUTTON_STATUS,   ACPI_BITREG_POWER_BUTTON_ENABLE, ACPI_BITMASK_POWER_BUTTON_STATUS,   ACPI_BITMASK_POWER_BUTTON_ENABLE},
	/* ACPI_EVENT_SLEEP_BUTTON  */  {ACPI_BITREG_SLEEP_BUTTON_STATUS,   ACPI_BITREG_SLEEP_BUTTON_ENABLE, ACPI_BITMASK_SLEEP_BUTTON_STATUS,   ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
	/* ACPI_EVENT_RTC           */  {ACPI_BITREG_RT_CLOCK_STATUS,       ACPI_BITREG_RT_CLOCK_ENABLE,     ACPI_BITMASK_RT_CLOCK_STATUS,       ACPI_BITMASK_RT_CLOCK_ENABLE},
};

/*****************************************************************************
 *
 * FUNCTION:    acpi_ut_get_region_name
 *
 * PARAMETERS:  None.
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Translate a Space ID into a name string (Debug only)
 *
 ****************************************************************************/

/* Region type decoding */

const char                *acpi_gbl_region_types[ACPI_NUM_PREDEFINED_REGIONS] =
{
/*! [Begin] no source code translation (keep these ASL Keywords as-is) */
	"SystemMemory",
	"SystemIO",
	"PCI_Config",
	"EmbeddedControl",
	"SMBus",
	"CMOS",
	"PCIBARTarget",
	"DataTable"
/*! [End] no source code translation !*/
};


char *
acpi_ut_get_region_name (
	u8                              space_id)
{

	if (space_id >= ACPI_USER_REGION_BEGIN)
	{
		return ("user_defined_region");
	}

	else if (space_id >= ACPI_NUM_PREDEFINED_REGIONS)
	{
		return ("invalid_space_id");
	}

	return ((char *) acpi_gbl_region_types[space_id]);
}


/*****************************************************************************
 *
 * FUNCTION:    acpi_ut_get_event_name
 *
 * PARAMETERS:  None.
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Translate a Event ID into a name string (Debug only)
 *
 ****************************************************************************/

/* Event type decoding */

static const char                *acpi_gbl_event_types[ACPI_NUM_FIXED_EVENTS] =
{
	"PM_Timer",
	"global_lock",
	"power_button",
	"sleep_button",
	"real_time_clock",
};


char *
acpi_ut_get_event_name (
	u32                             event_id)
{

	if (event_id > ACPI_EVENT_MAX)
	{