utmisc.c

来自「linux 内核源代码」· C语言 代码 · 共 1,081 行 · 第 1/2 页

	/* Get the full pathname to the node */

	buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
	status = acpi_ns_handle_to_pathname(obj_handle, &buffer);
	if (ACPI_FAILURE(status)) {
		return;
	}

	/* Print what we're doing */

	switch (type) {
	case ACPI_TYPE_METHOD:
		acpi_os_printf("Executing  ");
		break;

	default:
		acpi_os_printf("Initializing ");
		break;
	}

	/* Print the object type and pathname */

	acpi_os_printf("%-12s %s",
		       acpi_ut_get_type_name(type), (char *)buffer.pointer);

	/* Extra path is used to append names like _STA, _INI, etc. */

	if (path) {
		acpi_os_printf(".%s", path);
	}
	acpi_os_printf("\n");

	ACPI_FREE(buffer.pointer);
}
#endif

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_valid_acpi_char
 *
 * PARAMETERS:  Char            - The character to be examined
 *              Position        - Byte position (0-3)
 *
 * RETURN:      TRUE if the character is valid, FALSE otherwise
 *
 * DESCRIPTION: Check for a valid ACPI character. Must be one of:
 *              1) Upper case alpha
 *              2) numeric
 *              3) underscore
 *
 *              We allow a '!' as the last character because of the ASF! table
 *
 ******************************************************************************/

u8 acpi_ut_valid_acpi_char(char character, acpi_native_uint position)
{

	if (!((character >= 'A' && character <= 'Z') ||
	      (character >= '0' && character <= '9') || (character == '_'))) {

		/* Allow a '!' in the last position */

		if (character == '!' && position == 3) {
			return (TRUE);
		}

		return (FALSE);
	}

	return (TRUE);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_valid_acpi_name
 *
 * PARAMETERS:  Name            - The name to be examined
 *
 * RETURN:      TRUE if the name is valid, FALSE otherwise
 *
 * DESCRIPTION: Check for a valid ACPI name.  Each character must be one of:
 *              1) Upper case alpha
 *              2) numeric
 *              3) underscore
 *
 ******************************************************************************/

u8 acpi_ut_valid_acpi_name(u32 name)
{
	acpi_native_uint i;

	ACPI_FUNCTION_ENTRY();

	for (i = 0; i < ACPI_NAME_SIZE; i++) {
		if (!acpi_ut_valid_acpi_char
		    ((ACPI_CAST_PTR(char, &name))[i], i)) {
			return (FALSE);
		}
	}

	return (TRUE);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_repair_name
 *
 * PARAMETERS:  Name            - The ACPI name to be repaired
 *
 * RETURN:      Repaired version of the name
 *
 * DESCRIPTION: Repair an ACPI name: Change invalid characters to '*' and
 *              return the new name.
 *
 ******************************************************************************/

acpi_name acpi_ut_repair_name(char *name)
{
	acpi_native_uint i;
	char new_name[ACPI_NAME_SIZE];

	for (i = 0; i < ACPI_NAME_SIZE; i++) {
		new_name[i] = name[i];

		/*
		 * Replace a bad character with something printable, yet technically
		 * still invalid. This prevents any collisions with existing "good"
		 * names in the namespace.
		 */
		if (!acpi_ut_valid_acpi_char(name[i], i)) {
			new_name[i] = '*';
		}
	}

	return (*(u32 *) new_name);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_strtoul64
 *
 * PARAMETERS:  String          - Null terminated string
 *              Base            - Radix of the string: 16 or ACPI_ANY_BASE;
 *                                ACPI_ANY_BASE means 'in behalf of to_integer'
 *              ret_integer     - Where the converted integer is returned
 *
 * RETURN:      Status and Converted value
 *
 * DESCRIPTION: Convert a string into an unsigned value. Performs either a
 *              32-bit or 64-bit conversion, depending on the current mode
 *              of the interpreter.
 *              NOTE: Does not support Octal strings, not needed.
 *
 ******************************************************************************/

acpi_status
acpi_ut_strtoul64(char *string, u32 base, acpi_integer * ret_integer)
{
	u32 this_digit = 0;
	acpi_integer return_value = 0;
	acpi_integer quotient;
	acpi_integer dividend;
	u32 to_integer_op = (base == ACPI_ANY_BASE);
	u32 mode32 = (acpi_gbl_integer_byte_width == 4);
	u8 valid_digits = 0;
	u8 sign_of0x = 0;
	u8 term = 0;

	ACPI_FUNCTION_TRACE_STR(ut_stroul64, string);

	switch (base) {
	case ACPI_ANY_BASE:
	case 16:
		break;

	default:
		/* Invalid Base */
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	if (!string) {
		goto error_exit;
	}

	/* Skip over any white space in the buffer */

	while ((*string) && (ACPI_IS_SPACE(*string) || *string == '\t')) {
		string++;
	}

	if (to_integer_op) {
		/*
		 * Base equal to ACPI_ANY_BASE means 'to_integer operation case'.
		 * We need to determine if it is decimal or hexadecimal.
		 */
		if ((*string == '0') && (ACPI_TOLOWER(*(string + 1)) == 'x')) {
			sign_of0x = 1;
			base = 16;

			/* Skip over the leading '0x' */
			string += 2;
		} else {
			base = 10;
		}
	}

	/* Any string left? Check that '0x' is not followed by white space. */

	if (!(*string) || ACPI_IS_SPACE(*string) || *string == '\t') {
		if (to_integer_op) {
			goto error_exit;
		} else {
			goto all_done;
		}
	}

	/*
	 * Perform a 32-bit or 64-bit conversion, depending upon the current
	 * execution mode of the interpreter
	 */
	dividend = (mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX;

	/* Main loop: convert the string to a 32- or 64-bit integer */

	while (*string) {
		if (ACPI_IS_DIGIT(*string)) {

			/* Convert ASCII 0-9 to Decimal value */

			this_digit = ((u8) * string) - '0';
		} else if (base == 10) {

			/* Digit is out of range; possible in to_integer case only */

			term = 1;
		} else {
			this_digit = (u8) ACPI_TOUPPER(*string);
			if (ACPI_IS_XDIGIT((char)this_digit)) {

				/* Convert ASCII Hex char to value */

				this_digit = this_digit - 'A' + 10;
			} else {
				term = 1;
			}
		}

		if (term) {
			if (to_integer_op) {
				goto error_exit;
			} else {
				break;
			}
		} else if ((valid_digits == 0) && (this_digit == 0)
			   && !sign_of0x) {

			/* Skip zeros */
			string++;
			continue;
		}

		valid_digits++;

		if (sign_of0x && ((valid_digits > 16)
				  || ((valid_digits > 8) && mode32))) {
			/*
			 * This is to_integer operation case.
			 * No any restrictions for string-to-integer conversion,
			 * see ACPI spec.
			 */
			goto error_exit;
		}

		/* Divide the digit into the correct position */

		(void)
		    acpi_ut_short_divide((dividend - (acpi_integer) this_digit),
					 base, &quotient, NULL);

		if (return_value > quotient) {
			if (to_integer_op) {
				goto error_exit;
			} else {
				break;
			}
		}

		return_value *= base;
		return_value += this_digit;
		string++;
	}

	/* All done, normal exit */

      all_done:

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
			  ACPI_FORMAT_UINT64(return_value)));

	*ret_integer = return_value;
	return_ACPI_STATUS(AE_OK);

      error_exit:
	/* Base was set/validated above */

	if (base == 10) {
		return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT);
	} else {
		return_ACPI_STATUS(AE_BAD_HEX_CONSTANT);
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_create_update_state_and_push
 *
 * PARAMETERS:  Object          - Object to be added to the new state
 *              Action          - Increment/Decrement
 *              state_list      - List the state will be added to
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new state and push it
 *
 ******************************************************************************/

acpi_status
acpi_ut_create_update_state_and_push(union acpi_operand_object *object,
				     u16 action,
				     union acpi_generic_state **state_list)
{
	union acpi_generic_state *state;

	ACPI_FUNCTION_ENTRY();

	/* Ignore null objects; these are expected */

	if (!object) {
		return (AE_OK);
	}

	state = acpi_ut_create_update_state(object, action);
	if (!state) {
		return (AE_NO_MEMORY);
	}

	acpi_ut_push_generic_state(state_list, state);
	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_walk_package_tree
 *
 * PARAMETERS:  source_object       - The package to walk
 *              target_object       - Target object (if package is being copied)
 *              walk_callback       - Called once for each package element
 *              Context             - Passed to the callback function
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Walk through a package
 *
 ******************************************************************************/

acpi_status
acpi_ut_walk_package_tree(union acpi_operand_object * source_object,
			  void *target_object,
			  acpi_pkg_callback walk_callback, void *context)
{
	acpi_status status = AE_OK;
	union acpi_generic_state *state_list = NULL;
	union acpi_generic_state *state;
	u32 this_index;
	union acpi_operand_object *this_source_obj;

	ACPI_FUNCTION_TRACE(ut_walk_package_tree);

	state = acpi_ut_create_pkg_state(source_object, target_object, 0);
	if (!state) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	while (state) {

		/* Get one element of the package */

		this_index = state->pkg.index;
		this_source_obj = (union acpi_operand_object *)
		    state->pkg.source_object->package.elements[this_index];

		/*
		 * Check for:
		 * 1) An uninitialized package element.  It is completely
		 *    legal to declare a package and leave it uninitialized
		 * 2) Not an internal object - can be a namespace node instead
		 * 3) Any type other than a package.  Packages are handled in else
		 *    case below.
		 */
		if ((!this_source_obj) ||
		    (ACPI_GET_DESCRIPTOR_TYPE(this_source_obj) !=
		     ACPI_DESC_TYPE_OPERAND)
		    || (ACPI_GET_OBJECT_TYPE(this_source_obj) !=
			ACPI_TYPE_PACKAGE)) {
			status =
			    walk_callback(ACPI_COPY_TYPE_SIMPLE,
					  this_source_obj, state, context);
			if (ACPI_FAILURE(status)) {
				return_ACPI_STATUS(status);
			}

			state->pkg.index++;
			while (state->pkg.index >=
			       state->pkg.source_object->package.count) {
				/*
				 * We've handled all of the objects at this level,  This means
				 * that we have just completed a package.  That package may
				 * have contained one or more packages itself.
				 *
				 * Delete this state and pop the previous state (package).
				 */
				acpi_ut_delete_generic_state(state);
				state = acpi_ut_pop_generic_state(&state_list);

				/* Finished when there are no more states */

				if (!state) {
					/*
					 * We have handled all of the objects in the top level
					 * package just add the length of the package objects
					 * and exit
					 */
					return_ACPI_STATUS(AE_OK);
				}

				/*
				 * Go back up a level and move the index past the just
				 * completed package object.
				 */
				state->pkg.index++;
			}
		} else {
			/* This is a subobject of type package */

			status =
			    walk_callback(ACPI_COPY_TYPE_PACKAGE,
					  this_source_obj, state, context);
			if (ACPI_FAILURE(status)) {
				return_ACPI_STATUS(status);
			}

			/*
			 * Push the current state and create a new one
			 * The callback above returned a new target package object.
			 */
			acpi_ut_push_generic_state(&state_list, state);
			state = acpi_ut_create_pkg_state(this_source_obj,
							 state->pkg.
							 this_target_obj, 0);
			if (!state) {
				return_ACPI_STATUS(AE_NO_MEMORY);
			}
		}
	}

	/* We should never get here */

	return_ACPI_STATUS(AE_AML_INTERNAL);
}

/*******************************************************************************
 *
 * 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);
}

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);
}

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");
}