utglobal.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

/******************************************************************************
 *
 * Module Name: utglobal - Global variables for the ACPI subsystem
 *              $Revision: 133 $
 *
 *****************************************************************************/

/*
 *  Copyright (C) 2000, 2001 R. Byron Moore
 *
 *  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
 */

#define DEFINE_ACPI_GLOBALS

#include "acpi.h"
#include "acevents.h"
#include "acnamesp.h"
#include "acinterp.h"
#include "amlcode.h"


#define _COMPONENT          ACPI_UTILITIES
	 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;


	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;

	case AE_CODE_PROGRAMMER:

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

	case AE_CODE_ACPI_TABLES:

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

	case AE_CODE_AML:

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

	case AE_CODE_CONTROL:

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

	default:
		break;
	}


	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 */

#ifdef ACPI_DEBUG
u32                         acpi_dbg_level = DEBUG_DEFAULT;
#else
u32                         acpi_dbg_level = NORMAL_DEFAULT;
#endif

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

u32                         acpi_dbg_layer = ACPI_COMPONENT_DEFAULT;
u32                         acpi_gbl_nesting_level = 0;


/* Debugger globals */

u8                          acpi_gbl_db_terminate_threads = FALSE;
u8                          acpi_gbl_method_executing = FALSE;

/* System flags */

u32                         acpi_gbl_system_flags = 0;
u32                         acpi_gbl_startup_flags = 0;

/* System starts unitialized! */

u8                          acpi_gbl_shutdown = TRUE;

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

const NATIVE_CHAR           *acpi_gbl_db_sleep_states[ACPI_NUM_SLEEP_STATES] = {
			  "\\_S0_","\\_S1_","\\_S2_","\\_S3_",
			  "\\_S4_","\\_S5_","\\_S4B"};


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


/*
 * Names built-in to the interpreter
 *
 * Initial values are currently supported only for types String and Number.
 * To avoid type punning, both are specified as strings in this table.
 *
 * NOTES:
 * 1) _SB_ is defined to be a device to allow _SB_/_INI to be run
 *    during the initialization sequence.
 */

const predefined_names      acpi_gbl_pre_defined_names[] =
{ {"_GPE",    INTERNAL_TYPE_DEF_ANY},
	{"_PR_",    INTERNAL_TYPE_DEF_ANY},
	{"_SB_",    ACPI_TYPE_DEVICE},
	{"_SI_",    INTERNAL_TYPE_DEF_ANY},
	{"_TZ_",    INTERNAL_TYPE_DEF_ANY},
	{"_REV",    ACPI_TYPE_INTEGER, "2"},
	{"_OS_",    ACPI_TYPE_STRING, ACPI_OS_NAME},
	{"_GL_",    ACPI_TYPE_MUTEX, "0"},
	{NULL,      ACPI_TYPE_ANY}           /* Table terminator */
};


/*
 * Properties of the ACPI Object Types, both internal and external.
 *
 * Elements of Acpi_ns_properties are bit significant
 * and the table is indexed by values of acpi_object_type
 */

const u8                    acpi_gbl_ns_properties[] =
{
	NSP_NORMAL,                 /* 00 Any              */
	NSP_NORMAL,                 /* 01 Number           */
	NSP_NORMAL,                 /* 02 String           */
	NSP_NORMAL,                 /* 03 Buffer           */
	NSP_LOCAL,                  /* 04 Package          */
	NSP_NORMAL,                 /* 05 Field_unit       */
	NSP_NEWSCOPE | NSP_LOCAL,   /* 06 Device           */
	NSP_LOCAL,                  /* 07 Acpi_event       */
	NSP_NEWSCOPE | NSP_LOCAL,   /* 08 Method           */
	NSP_LOCAL,                  /* 09 Mutex            */
	NSP_LOCAL,                  /* 10 Region           */
	NSP_NEWSCOPE | NSP_LOCAL,   /* 11 Power            */
	NSP_NEWSCOPE | NSP_LOCAL,   /* 12 Processor        */
	NSP_NEWSCOPE | NSP_LOCAL,   /* 13 Thermal          */
	NSP_NORMAL,                 /* 14 Buffer_field     */
	NSP_NORMAL,                 /* 15 Ddb_handle       */
	NSP_NORMAL,                 /* 16 Debug Object     */
	NSP_NORMAL,                 /* 17 Def_field        */
	NSP_NORMAL,                 /* 18 Bank_field       */
	NSP_NORMAL,                 /* 19 Index_field      */
	NSP_NORMAL,                 /* 20 Reference        */
	NSP_NORMAL,                 /* 21 Alias            */
	NSP_NORMAL,                 /* 22 Notify           */
	NSP_NORMAL,                 /* 23 Address Handler  */
	NSP_NEWSCOPE | NSP_LOCAL,   /* 24 Resource Desc    */
	NSP_NEWSCOPE | NSP_LOCAL,   /* 25 Resource Field   */
	NSP_NORMAL,                 /* 26 Def_field_defn   */
	NSP_NORMAL,                 /* 27 Bank_field_defn  */
	NSP_NORMAL,                 /* 28 Index_field_defn */
	NSP_NORMAL,                 /* 29 If               */
	NSP_NORMAL,                 /* 30 Else             */
	NSP_NORMAL,                 /* 31 While            */
	NSP_NEWSCOPE,               /* 32 Scope            */
	NSP_LOCAL,                  /* 33 Def_any          */
	NSP_NORMAL,                 /* 34 Extra            */
	NSP_NORMAL                  /* 35 Invalid          */
};


/* Hex to ASCII conversion table */

const NATIVE_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
 *
 ****************************************************************************/

u8
acpi_ut_hex_to_ascii_char (
	acpi_integer            integer,
	u32                     position)
{

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


/******************************************************************************
 *
 * Table 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.
 *
 ******************************************************************************/


acpi_table_desc             acpi_gbl_acpi_tables[NUM_ACPI_TABLES];


ACPI_TABLE_SUPPORT          acpi_gbl_acpi_table_data[NUM_ACPI_TABLES] =
{
	/***********    Name,    Signature,  Signature size,    How many allowed?,   Supported?  Global typed pointer */

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


#ifdef ACPI_DEBUG

/*
 * Strings and procedures used for debug only
 *
 */


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

NATIVE_CHAR *
acpi_ut_get_mutex_name (
	u32                     mutex_id)
{

	if (mutex_id > MAX_MTX)
	{
		return ("Invalid Mutex ID");
	}

	return (acpi_gbl_mutex_names[mutex_id]);
}


/*
 * Elements of Acpi_gbl_Ns_type_names below must match
 * one-to-one with values of acpi_object_type
 *
 * The type ACPI_TYPE_ANY (Untyped) is used as a "don't care" when searching; when
 * stored in a table it really means that we have thus far seen no evidence to
 * indicatewhat type is actually going to be stored for this entry.
 */

static const NATIVE_CHAR    acpi_gbl_bad_type[] = "UNDEFINED";
#define TYPE_NAME_LENGTH    12                           /* Maximum length of each string */

static const NATIVE_CHAR    *acpi_gbl_ns_type_names[] = /* printable names of ACPI types */
{
	/* 00 */ "Untyped",
	/* 01 */ "Integer",
	/* 02 */ "String",
	/* 03 */ "Buffer",
	/* 04 */ "Package",
	/* 05 */ "Field_unit",
	/* 06 */ "Device",
	/* 07 */ "Event",
	/* 08 */ "Method",
	/* 09 */ "Mutex",
	/* 10 */ "Region",
	/* 11 */ "Power",
	/* 12 */ "Processor",
	/* 13 */ "Thermal",
	/* 14 */ "Buffer_field",
	/* 15 */ "Ddb_handle",
	/* 16 */ "Debug_object",
	/* 17 */ "Region_field",
	/* 18 */ "Bank_field",
	/* 19 */ "Index_field",
	/* 20 */ "Reference",
	/* 21 */ "Alias",
	/* 22 */ "Notify",
	/* 23 */ "Addr_handler",
	/* 24 */ "Resource_desc",