utmisc.c

来自「xen虚拟机源代码安装包」· C语言 代码 · 共 230 行

/*******************************************************************************
 *
 * Module Name: utmisc - common utility procedures
 *
 ******************************************************************************/

/*
 * Copyright (C) 2000 - 2008, Intel Corp.
 * 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.
 */

#include <xen/config.h>
#include <xen/init.h>
#include <acpi/acpi.h>

#define _COMPONENT          ACPI_UTILITIES
ACPI_MODULE_NAME("utmisc")

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_validate_exception
 *
 * PARAMETERS:  Status       - The acpi_status code to be formatted
 *
 * RETURN:      A string containing the exception text. NULL if exception is
 *              not valid.
 *
 * DESCRIPTION: This function validates and translates an ACPI exception into
 *              an ASCII string.
 *
 ******************************************************************************/
const char *acpi_ut_validate_exception(acpi_status status)
{
	acpi_status sub_status;
	const char *exception = NULL;

	ACPI_FUNCTION_ENTRY();

	/*
	 * Status is composed of two parts, a "type" and an actual code
	 */
	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 (ACPI_CAST_PTR(const char, exception));
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_set_integer_width
 *
 * PARAMETERS:  Revision            From DSDT header
 *
 * RETURN:      None
 *
 * DESCRIPTION: Set the global integer bit width based upon the revision
 *              of the DSDT.  For Revision 1 and 0, Integers are 32 bits.
 *              For Revision 2 and above, Integers are 64 bits.  Yes, this
 *              makes a difference.
 *
 ******************************************************************************/

void acpi_ut_set_integer_width(u8 revision)
{

	if (revision < 2) {

		/* 32-bit case */

		acpi_gbl_integer_bit_width = 32;
		acpi_gbl_integer_nybble_width = 8;
		acpi_gbl_integer_byte_width = 4;
	} else {
		/* 64-bit case (ACPI 2.0+) */

		acpi_gbl_integer_bit_width = 64;
		acpi_gbl_integer_nybble_width = 16;
		acpi_gbl_integer_byte_width = 8;
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_error, acpi_ut_warning, acpi_ut_info
 *
 * PARAMETERS:  module_name         - Caller's module name (for error output)
 *              line_number         - Caller's line number (for error output)
 *              Format              - Printf format string + additional args
 *
 * RETURN:      None
 *
 * DESCRIPTION: Print message with module/line/version info
 *
 ******************************************************************************/

void ACPI_INTERNAL_VAR_XFACE
acpi_ut_error(char *module_name, u32 line_number, char *format, ...)
{
	va_list args;

	acpi_os_printf("ACPI Error (%s-%04d): ", module_name, line_number);

	va_start(args, format);
	acpi_os_vprintf(format, args);
	acpi_os_printf(" [%X]\n", ACPI_CA_VERSION);
	va_end(args);
}

void ACPI_INTERNAL_VAR_XFACE
acpi_ut_exception(char *module_name,
		  u32 line_number, acpi_status status, char *format, ...)
{
	va_list args;

	acpi_os_printf("ACPI Exception (%s-%04d): %s, ", module_name,
		       line_number, acpi_format_exception(status));

	va_start(args, format);
	acpi_os_vprintf(format, args);
	acpi_os_printf(" [%X]\n", ACPI_CA_VERSION);
}

EXPORT_SYMBOL(acpi_ut_exception);

void ACPI_INTERNAL_VAR_XFACE
acpi_ut_warning(char *module_name, u32 line_number, char *format, ...)
{
	va_list args;

	acpi_os_printf("ACPI Warning (%s-%04d): ", module_name, line_number);

	va_start(args, format);
	acpi_os_vprintf(format, args);
	acpi_os_printf(" [%X]\n", ACPI_CA_VERSION);
	va_end(args);
	va_end(args);
}

void ACPI_INTERNAL_VAR_XFACE
acpi_ut_info(char *module_name, u32 line_number, char *format, ...)
{
	va_list args;

	/*
	 * Removed module_name, line_number, and acpica version, not needed
	 * for info output
	 */
	acpi_os_printf("ACPI: ");

	va_start(args, format);
	acpi_os_vprintf(format, args);
	acpi_os_printf("\n");
	va_end(args);
}