1 files changed, 421 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/exutils.c b/drivers/acpi/acpica/exutils.c
new file mode 100644
index 000000000000..0ecdb70c4980
--- /dev/null
+++ b/drivers/acpi/acpica/exutils.c
@@ -0,0 +1,421 @@
+
+/******************************************************************************
+ *
+ * Module Name: exutils - interpreter/scanner utilities
+ *
+ *****************************************************************************/
+
+/*
+ * 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.
+ */
+
+/*
+ * DEFINE_AML_GLOBALS is tested in amlcode.h
+ * to determine whether certain global names should be "defined" or only
+ * "declared" in the current compilation.  This enhances maintainability
+ * by enabling a single header file to embody all knowledge of the names
+ * in question.
+ *
+ * Exactly one module of any executable should #define DEFINE_GLOBALS
+ * before #including the header files which use this convention.  The
+ * names in question will be defined and initialized in that module,
+ * and declared as extern in all other modules which #include those
+ * header files.
+ */
+
+#define DEFINE_AML_GLOBALS
+
+#include <acpi/acpi.h>
+#include <acpi/accommon.h>
+#include <acpi/acinterp.h>
+#include <acpi/amlcode.h>
+
+#define _COMPONENT          ACPI_EXECUTER
+ACPI_MODULE_NAME("exutils")
+
+/* Local prototypes */
+static u32 acpi_ex_digits_needed(acpi_integer value, u32 base);
+
+#ifndef ACPI_NO_METHOD_EXECUTION
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_enter_interpreter
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Enter the interpreter execution region. Failure to enter
+ *              the interpreter region is a fatal system error. Used in
+ *              conjunction with exit_interpreter.
+ *
+ ******************************************************************************/
+
+void acpi_ex_enter_interpreter(void)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ex_enter_interpreter);
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
+	if (ACPI_FAILURE(status)) {
+		ACPI_ERROR((AE_INFO,
+			    "Could not acquire AML Interpreter mutex"));
+	}
+
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_reacquire_interpreter
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Reacquire the interpreter execution region from within the
+ *              interpreter code. Failure to enter the interpreter region is a
+ *              fatal system error. Used in  conjuction with
+ *              relinquish_interpreter
+ *
+ ******************************************************************************/
+
+void acpi_ex_reacquire_interpreter(void)
+{
+	ACPI_FUNCTION_TRACE(ex_reacquire_interpreter);
+
+	/*
+	 * If the global serialized flag is set, do not release the interpreter,
+	 * since it was not actually released by acpi_ex_relinquish_interpreter.
+	 * This forces the interpreter to be single threaded.
+	 */
+	if (!acpi_gbl_all_methods_serialized) {
+		acpi_ex_enter_interpreter();
+	}
+
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_exit_interpreter
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Exit the interpreter execution region. This is the top level
+ *              routine used to exit the interpreter when all processing has
+ *              been completed.
+ *
+ ******************************************************************************/
+
+void acpi_ex_exit_interpreter(void)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ex_exit_interpreter);
+
+	status = acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
+	if (ACPI_FAILURE(status)) {
+		ACPI_ERROR((AE_INFO,
+			    "Could not release AML Interpreter mutex"));
+	}
+
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_relinquish_interpreter
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Exit the interpreter execution region, from within the
+ *              interpreter - before attempting an operation that will possibly
+ *              block the running thread.
+ *
+ * Cases where the interpreter is unlocked internally
+ *      1) Method to be blocked on a Sleep() AML opcode
+ *      2) Method to be blocked on an Acquire() AML opcode
+ *      3) Method to be blocked on a Wait() AML opcode
+ *      4) Method to be blocked to acquire the global lock
+ *      5) Method to be blocked waiting to execute a serialized control method
+ *          that is currently executing
+ *      6) About to invoke a user-installed opregion handler
+ *
+ ******************************************************************************/
+
+void acpi_ex_relinquish_interpreter(void)
+{
+	ACPI_FUNCTION_TRACE(ex_relinquish_interpreter);
+
+	/*
+	 * If the global serialized flag is set, do not release the interpreter.
+	 * This forces the interpreter to be single threaded.
+	 */
+	if (!acpi_gbl_all_methods_serialized) {
+		acpi_ex_exit_interpreter();
+	}
+
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_truncate_for32bit_table
+ *
+ * PARAMETERS:  obj_desc        - Object to be truncated
+ *
+ * RETURN:      none
+ *
+ * DESCRIPTION: Truncate an ACPI Integer to 32 bits if the execution mode is
+ *              32-bit, as determined by the revision of the DSDT.
+ *
+ ******************************************************************************/
+
+void acpi_ex_truncate_for32bit_table(union acpi_operand_object *obj_desc)
+{
+
+	ACPI_FUNCTION_ENTRY();
+
+	/*
+	 * Object must be a valid number and we must be executing
+	 * a control method. NS node could be there for AML_INT_NAMEPATH_OP.
+	 */
+	if ((!obj_desc) ||
+	    (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != ACPI_DESC_TYPE_OPERAND) ||
+	    (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_INTEGER)) {
+		return;
+	}
+
+	if (acpi_gbl_integer_byte_width == 4) {
+		/*
+		 * We are running a method that exists in a 32-bit ACPI table.
+		 * Truncate the value to 32 bits by zeroing out the upper 32-bit field
+		 */
+		obj_desc->integer.value &= (acpi_integer) ACPI_UINT32_MAX;
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_acquire_global_lock
+ *
+ * PARAMETERS:  field_flags           - Flags with Lock rule:
+ *                                      always_lock or never_lock
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Obtain the ACPI hardware Global Lock, only if the field
+ *              flags specifiy that it is to be obtained before field access.
+ *
+ ******************************************************************************/
+
+void acpi_ex_acquire_global_lock(u32 field_flags)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ex_acquire_global_lock);
+
+	/* Only use the lock if the always_lock bit is set */
+
+	if (!(field_flags & AML_FIELD_LOCK_RULE_MASK)) {
+		return_VOID;
+	}
+
+	/* Attempt to get the global lock, wait forever */
+
+	status = acpi_ex_acquire_mutex_object(ACPI_WAIT_FOREVER,
+					      acpi_gbl_global_lock_mutex,
+					      acpi_os_get_thread_id());
+
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status,
+				"Could not acquire Global Lock"));
+	}
+
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_release_global_lock
+ *
+ * PARAMETERS:  field_flags           - Flags with Lock rule:
+ *                                      always_lock or never_lock
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Release the ACPI hardware Global Lock
+ *
+ ******************************************************************************/
+
+void acpi_ex_release_global_lock(u32 field_flags)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ex_release_global_lock);
+
+	/* Only use the lock if the always_lock bit is set */
+
+	if (!(field_flags & AML_FIELD_LOCK_RULE_MASK)) {
+		return_VOID;
+	}
+
+	/* Release the global lock */
+
+	status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex);
+	if (ACPI_FAILURE(status)) {
+
+		/* Report the error, but there isn't much else we can do */
+
+		ACPI_EXCEPTION((AE_INFO, status,
+				"Could not release Global Lock"));
+	}
+
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_digits_needed
+ *
+ * PARAMETERS:  Value           - Value to be represented
+ *              Base            - Base of representation
+ *
+ * RETURN:      The number of digits.
+ *
+ * DESCRIPTION: Calculate the number of digits needed to represent the Value
+ *              in the given Base (Radix)
+ *
+ ******************************************************************************/
+
+static u32 acpi_ex_digits_needed(acpi_integer value, u32 base)
+{
+	u32 num_digits;
+	acpi_integer current_value;
+
+	ACPI_FUNCTION_TRACE(ex_digits_needed);
+
+	/* acpi_integer is unsigned, so we don't worry about a '-' prefix */
+
+	if (value == 0) {
+		return_UINT32(1);
+	}
+
+	current_value = value;
+	num_digits = 0;
+
+	/* Count the digits in the requested base */
+
+	while (current_value) {
+		(void)acpi_ut_short_divide(current_value, base, &current_value,
+					   NULL);
+		num_digits++;
+	}
+
+	return_UINT32(num_digits);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_eisa_id_to_string
+ *
+ * PARAMETERS:  numeric_id      - EISA ID to be converted
+ *              out_string      - Where to put the converted string (8 bytes)
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Convert a numeric EISA ID to string representation
+ *
+ ******************************************************************************/
+
+void acpi_ex_eisa_id_to_string(u32 numeric_id, char *out_string)
+{
+	u32 eisa_id;
+
+	ACPI_FUNCTION_ENTRY();
+
+	/* Swap ID to big-endian to get contiguous bits */
+
+	eisa_id = acpi_ut_dword_byte_swap(numeric_id);
+
+	out_string[0] = (char)('@' + (((unsigned long)eisa_id >> 26) & 0x1f));
+	out_string[1] = (char)('@' + ((eisa_id >> 21) & 0x1f));
+	out_string[2] = (char)('@' + ((eisa_id >> 16) & 0x1f));
+	out_string[3] = acpi_ut_hex_to_ascii_char((acpi_integer) eisa_id, 12);
+	out_string[4] = acpi_ut_hex_to_ascii_char((acpi_integer) eisa_id, 8);
+	out_string[5] = acpi_ut_hex_to_ascii_char((acpi_integer) eisa_id, 4);
+	out_string[6] = acpi_ut_hex_to_ascii_char((acpi_integer) eisa_id, 0);
+	out_string[7] = 0;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_unsigned_integer_to_string
+ *
+ * PARAMETERS:  Value           - Value to be converted
+ *              out_string      - Where to put the converted string (8 bytes)
+ *
+ * RETURN:      None, string
+ *
+ * DESCRIPTION: Convert a number to string representation. Assumes string
+ *              buffer is large enough to hold the string.
+ *
+ ******************************************************************************/
+
+void acpi_ex_unsigned_integer_to_string(acpi_integer value, char *out_string)
+{
+	u32 count;
+	u32 digits_needed;
+	u32 remainder;
+
+	ACPI_FUNCTION_ENTRY();
+
+	digits_needed = acpi_ex_digits_needed(value, 10);
+	out_string[digits_needed] = 0;
+
+	for (count = digits_needed; count > 0; count--) {
+		(void)acpi_ut_short_divide(value, 10, &value, &remainder);
+		out_string[count - 1] = (char)('0' + remainder);
+	}
+}
+
+#endif