Initial import

1 files changed, 874 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/psargs.c b/drivers/acpi/acpica/psargs.c
new file mode 100644
index 000000000..6d0387705
--- /dev/null
+++ b/drivers/acpi/acpica/psargs.c
@@ -0,0 +1,874 @@
+/******************************************************************************
+ *
+ * Module Name: psargs - Parse AML opcode arguments
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, 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 <acpi/acpi.h>
+#include "accommon.h"
+#include "acparser.h"
+#include "amlcode.h"
+#include "acnamesp.h"
+#include "acdispat.h"
+
+#define _COMPONENT          ACPI_PARSER
+ACPI_MODULE_NAME("psargs")
+
+/* Local prototypes */
+static u32
+acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state);
+
+static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state
+						       *parser_state);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_get_next_package_length
+ *
+ * PARAMETERS:  parser_state        - Current parser state object
+ *
+ * RETURN:      Decoded package length. On completion, the AML pointer points
+ *              past the length byte or bytes.
+ *
+ * DESCRIPTION: Decode and return a package length field.
+ *              Note: Largest package length is 28 bits, from ACPI specification
+ *
+ ******************************************************************************/
+
+static u32
+acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state)
+{
+	u8 *aml = parser_state->aml;
+	u32 package_length = 0;
+	u32 byte_count;
+	u8 byte_zero_mask = 0x3F;	/* Default [0:5] */
+
+	ACPI_FUNCTION_TRACE(ps_get_next_package_length);
+
+	/*
+	 * Byte 0 bits [6:7] contain the number of additional bytes
+	 * used to encode the package length, either 0,1,2, or 3
+	 */
+	byte_count = (aml[0] >> 6);
+	parser_state->aml += ((acpi_size) byte_count + 1);
+
+	/* Get bytes 3, 2, 1 as needed */
+
+	while (byte_count) {
+		/*
+		 * Final bit positions for the package length bytes:
+		 *      Byte3->[20:27]
+		 *      Byte2->[12:19]
+		 *      Byte1->[04:11]
+		 *      Byte0->[00:03]
+		 */
+		package_length |= (aml[byte_count] << ((byte_count << 3) - 4));
+
+		byte_zero_mask = 0x0F;	/* Use bits [0:3] of byte 0 */
+		byte_count--;
+	}
+
+	/* Byte 0 is a special case, either bits [0:3] or [0:5] are used */
+
+	package_length |= (aml[0] & byte_zero_mask);
+	return_UINT32(package_length);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_get_next_package_end
+ *
+ * PARAMETERS:  parser_state        - Current parser state object
+ *
+ * RETURN:      Pointer to end-of-package +1
+ *
+ * DESCRIPTION: Get next package length and return a pointer past the end of
+ *              the package. Consumes the package length field
+ *
+ ******************************************************************************/
+
+u8 *acpi_ps_get_next_package_end(struct acpi_parse_state *parser_state)
+{
+	u8 *start = parser_state->aml;
+	u32 package_length;
+
+	ACPI_FUNCTION_TRACE(ps_get_next_package_end);
+
+	/* Function below updates parser_state->Aml */
+
+	package_length = acpi_ps_get_next_package_length(parser_state);
+
+	return_PTR(start + package_length);	/* end of package */
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_get_next_namestring
+ *
+ * PARAMETERS:  parser_state        - Current parser state object
+ *
+ * RETURN:      Pointer to the start of the name string (pointer points into
+ *              the AML.
+ *
+ * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name
+ *              prefix characters. Set parser state to point past the string.
+ *              (Name is consumed from the AML.)
+ *
+ ******************************************************************************/
+
+char *acpi_ps_get_next_namestring(struct acpi_parse_state *parser_state)
+{
+	u8 *start = parser_state->aml;
+	u8 *end = parser_state->aml;
+
+	ACPI_FUNCTION_TRACE(ps_get_next_namestring);
+
+	/* Point past any namestring prefix characters (backslash or carat) */
+
+	while (ACPI_IS_ROOT_PREFIX(*end) || ACPI_IS_PARENT_PREFIX(*end)) {
+		end++;
+	}
+
+	/* Decode the path prefix character */
+
+	switch (*end) {
+	case 0:
+
+		/* null_name */
+
+		if (end == start) {
+			start = NULL;
+		}
+		end++;
+		break;
+
+	case AML_DUAL_NAME_PREFIX:
+
+		/* Two name segments */
+
+		end += 1 + (2 * ACPI_NAME_SIZE);
+		break;
+
+	case AML_MULTI_NAME_PREFIX_OP:
+
+		/* Multiple name segments, 4 chars each, count in next byte */
+
+		end += 2 + (*(end + 1) * ACPI_NAME_SIZE);
+		break;
+
+	default:
+
+		/* Single name segment */
+
+		end += ACPI_NAME_SIZE;
+		break;
+	}
+
+	parser_state->aml = end;
+	return_PTR((char *)start);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_get_next_namepath
+ *
+ * PARAMETERS:  parser_state        - Current parser state object
+ *              arg                 - Where the namepath will be stored
+ *              arg_count           - If the namepath points to a control method
+ *                                    the method's argument is returned here.
+ *              possible_method_call - Whether the namepath can possibly be the
+ *                                    start of a method call
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Get next name (if method call, return # of required args).
+ *              Names are looked up in the internal namespace to determine
+ *              if the name represents a control method. If a method
+ *              is found, the number of arguments to the method is returned.
+ *              This information is critical for parsing to continue correctly.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state,
+			  struct acpi_parse_state *parser_state,
+			  union acpi_parse_object *arg, u8 possible_method_call)
+{
+	acpi_status status;
+	char *path;
+	union acpi_parse_object *name_op;
+	union acpi_operand_object *method_desc;
+	struct acpi_namespace_node *node;
+	u8 *start = parser_state->aml;
+
+	ACPI_FUNCTION_TRACE(ps_get_next_namepath);
+
+	path = acpi_ps_get_next_namestring(parser_state);
+	acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP);
+
+	/* Null path case is allowed, just exit */
+
+	if (!path) {
+		arg->common.value.name = path;
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/*
+	 * Lookup the name in the internal namespace, starting with the current
+	 * scope. We don't want to add anything new to the namespace here,
+	 * however, so we use MODE_EXECUTE.
+	 * Allow searching of the parent tree, but don't open a new scope -
+	 * we just want to lookup the object (must be mode EXECUTE to perform
+	 * the upsearch)
+	 */
+	status = acpi_ns_lookup(walk_state->scope_info, path,
+				ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
+				ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
+				NULL, &node);
+
+	/*
+	 * If this name is a control method invocation, we must
+	 * setup the method call
+	 */
+	if (ACPI_SUCCESS(status) &&
+	    possible_method_call && (node->type == ACPI_TYPE_METHOD)) {
+		if (walk_state->opcode == AML_UNLOAD_OP) {
+			/*
+			 * acpi_ps_get_next_namestring has increased the AML pointer,
+			 * so we need to restore the saved AML pointer for method call.
+			 */
+			walk_state->parser_state.aml = start;
+			walk_state->arg_count = 1;
+			acpi_ps_init_op(arg, AML_INT_METHODCALL_OP);
+			return_ACPI_STATUS(AE_OK);
+		}
+
+		/* This name is actually a control method invocation */
+
+		method_desc = acpi_ns_get_attached_object(node);
+		ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
+				  "Control Method - %p Desc %p Path=%p\n", node,
+				  method_desc, path));
+
+		name_op = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP);
+		if (!name_op) {
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
+
+		/* Change Arg into a METHOD CALL and attach name to it */
+
+		acpi_ps_init_op(arg, AML_INT_METHODCALL_OP);
+		name_op->common.value.name = path;
+
+		/* Point METHODCALL/NAME to the METHOD Node */
+
+		name_op->common.node = node;
+		acpi_ps_append_arg(arg, name_op);
+
+		if (!method_desc) {
+			ACPI_ERROR((AE_INFO,
+				    "Control Method %p has no attached object",
+				    node));
+			return_ACPI_STATUS(AE_AML_INTERNAL);
+		}
+
+		ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
+				  "Control Method - %p Args %X\n",
+				  node, method_desc->method.param_count));
+
+		/* Get the number of arguments to expect */
+
+		walk_state->arg_count = method_desc->method.param_count;
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/*
+	 * Special handling if the name was not found during the lookup -
+	 * some not_found cases are allowed
+	 */
+	if (status == AE_NOT_FOUND) {
+
+		/* 1) not_found is ok during load pass 1/2 (allow forward references) */
+
+		if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) !=
+		    ACPI_PARSE_EXECUTE) {
+			status = AE_OK;
+		}
+
+		/* 2) not_found during a cond_ref_of(x) is ok by definition */
+
+		else if (walk_state->op->common.aml_opcode ==
+			 AML_COND_REF_OF_OP) {
+			status = AE_OK;
+		}
+
+		/*
+		 * 3) not_found while building a Package is ok at this point, we
+		 * may flag as an error later if slack mode is not enabled.
+		 * (Some ASL code depends on allowing this behavior)
+		 */
+		else if ((arg->common.parent) &&
+			 ((arg->common.parent->common.aml_opcode ==
+			   AML_PACKAGE_OP)
+			  || (arg->common.parent->common.aml_opcode ==
+			      AML_VAR_PACKAGE_OP))) {
+			status = AE_OK;
+		}
+	}
+
+	/* Final exception check (may have been changed from code above) */
+
+	if (ACPI_FAILURE(status)) {
+		ACPI_ERROR_NAMESPACE(path, status);
+
+		if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) ==
+		    ACPI_PARSE_EXECUTE) {
+
+			/* Report a control method execution error */
+
+			status = acpi_ds_method_error(status, walk_state);
+		}
+	}
+
+	/* Save the namepath */
+
+	arg->common.value.name = path;
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_get_next_simple_arg
+ *
+ * PARAMETERS:  parser_state        - Current parser state object
+ *              arg_type            - The argument type (AML_*_ARG)
+ *              arg                 - Where the argument is returned
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Get the next simple argument (constant, string, or namestring)
+ *
+ ******************************************************************************/
+
+void
+acpi_ps_get_next_simple_arg(struct acpi_parse_state *parser_state,
+			    u32 arg_type, union acpi_parse_object *arg)
+{
+	u32 length;
+	u16 opcode;
+	u8 *aml = parser_state->aml;
+
+	ACPI_FUNCTION_TRACE_U32(ps_get_next_simple_arg, arg_type);
+
+	switch (arg_type) {
+	case ARGP_BYTEDATA:
+
+		/* Get 1 byte from the AML stream */
+
+		opcode = AML_BYTE_OP;
+		arg->common.value.integer = (u64) *aml;
+		length = 1;
+		break;
+
+	case ARGP_WORDDATA:
+
+		/* Get 2 bytes from the AML stream */
+
+		opcode = AML_WORD_OP;
+		ACPI_MOVE_16_TO_64(&arg->common.value.integer, aml);
+		length = 2;
+		break;
+
+	case ARGP_DWORDDATA:
+
+		/* Get 4 bytes from the AML stream */
+
+		opcode = AML_DWORD_OP;
+		ACPI_MOVE_32_TO_64(&arg->common.value.integer, aml);
+		length = 4;
+		break;
+
+	case ARGP_QWORDDATA:
+
+		/* Get 8 bytes from the AML stream */
+
+		opcode = AML_QWORD_OP;
+		ACPI_MOVE_64_TO_64(&arg->common.value.integer, aml);
+		length = 8;
+		break;
+
+	case ARGP_CHARLIST:
+
+		/* Get a pointer to the string, point past the string */
+
+		opcode = AML_STRING_OP;
+		arg->common.value.string = ACPI_CAST_PTR(char, aml);
+
+		/* Find the null terminator */
+
+		length = 0;
+		while (aml[length]) {
+			length++;
+		}
+		length++;
+		break;
+
+	case ARGP_NAME:
+	case ARGP_NAMESTRING:
+
+		acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP);
+		arg->common.value.name =
+		    acpi_ps_get_next_namestring(parser_state);
+		return_VOID;
+
+	default:
+
+		ACPI_ERROR((AE_INFO, "Invalid ArgType 0x%X", arg_type));
+		return_VOID;
+	}
+
+	acpi_ps_init_op(arg, opcode);
+	parser_state->aml += length;
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_get_next_field
+ *
+ * PARAMETERS:  parser_state        - Current parser state object
+ *
+ * RETURN:      A newly allocated FIELD op
+ *
+ * DESCRIPTION: Get next field (named_field, reserved_field, or access_field)
+ *
+ ******************************************************************************/
+
+static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state
+						       *parser_state)
+{
+	u32 aml_offset;
+	union acpi_parse_object *field;
+	union acpi_parse_object *arg = NULL;
+	u16 opcode;
+	u32 name;
+	u8 access_type;
+	u8 access_attribute;
+	u8 access_length;
+	u32 pkg_length;
+	u8 *pkg_end;
+	u32 buffer_length;
+
+	ACPI_FUNCTION_TRACE(ps_get_next_field);
+
+	aml_offset =
+	    (u32)ACPI_PTR_DIFF(parser_state->aml, parser_state->aml_start);
+
+	/* Determine field type */
+
+	switch (ACPI_GET8(parser_state->aml)) {
+	case AML_FIELD_OFFSET_OP:
+
+		opcode = AML_INT_RESERVEDFIELD_OP;
+		parser_state->aml++;
+		break;
+
+	case AML_FIELD_ACCESS_OP:
+
+		opcode = AML_INT_ACCESSFIELD_OP;
+		parser_state->aml++;
+		break;
+
+	case AML_FIELD_CONNECTION_OP:
+
+		opcode = AML_INT_CONNECTION_OP;
+		parser_state->aml++;
+		break;
+
+	case AML_FIELD_EXT_ACCESS_OP:
+
+		opcode = AML_INT_EXTACCESSFIELD_OP;
+		parser_state->aml++;
+		break;
+
+	default:
+
+		opcode = AML_INT_NAMEDFIELD_OP;
+		break;
+	}
+
+	/* Allocate a new field op */
+
+	field = acpi_ps_alloc_op(opcode);
+	if (!field) {
+		return_PTR(NULL);
+	}
+
+	field->common.aml_offset = aml_offset;
+
+	/* Decode the field type */
+
+	switch (opcode) {
+	case AML_INT_NAMEDFIELD_OP:
+
+		/* Get the 4-character name */
+
+		ACPI_MOVE_32_TO_32(&name, parser_state->aml);
+		acpi_ps_set_name(field, name);
+		parser_state->aml += ACPI_NAME_SIZE;
+
+		/* Get the length which is encoded as a package length */
+
+		field->common.value.size =
+		    acpi_ps_get_next_package_length(parser_state);
+		break;
+
+	case AML_INT_RESERVEDFIELD_OP:
+
+		/* Get the length which is encoded as a package length */
+
+		field->common.value.size =
+		    acpi_ps_get_next_package_length(parser_state);
+		break;
+
+	case AML_INT_ACCESSFIELD_OP:
+	case AML_INT_EXTACCESSFIELD_OP:
+
+		/*
+		 * Get access_type and access_attrib and merge into the field Op
+		 * access_type is first operand, access_attribute is second. stuff
+		 * these bytes into the node integer value for convenience.
+		 */
+
+		/* Get the two bytes (Type/Attribute) */
+
+		access_type = ACPI_GET8(parser_state->aml);
+		parser_state->aml++;
+		access_attribute = ACPI_GET8(parser_state->aml);
+		parser_state->aml++;
+
+		field->common.value.integer = (u8)access_type;
+		field->common.value.integer |= (u16)(access_attribute << 8);
+
+		/* This opcode has a third byte, access_length */
+
+		if (opcode == AML_INT_EXTACCESSFIELD_OP) {
+			access_length = ACPI_GET8(parser_state->aml);
+			parser_state->aml++;
+
+			field->common.value.integer |=
+			    (u32)(access_length << 16);
+		}
+		break;
+
+	case AML_INT_CONNECTION_OP:
+
+		/*
+		 * Argument for Connection operator can be either a Buffer
+		 * (resource descriptor), or a name_string.
+		 */
+		if (ACPI_GET8(parser_state->aml) == AML_BUFFER_OP) {
+			parser_state->aml++;
+
+			pkg_end = parser_state->aml;
+			pkg_length =
+			    acpi_ps_get_next_package_length(parser_state);
+			pkg_end += pkg_length;
+
+			if (parser_state->aml < pkg_end) {
+
+				/* Non-empty list */
+
+				arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP);
+				if (!arg) {
+					acpi_ps_free_op(field);
+					return_PTR(NULL);
+				}
+
+				/* Get the actual buffer length argument */
+
+				opcode = ACPI_GET8(parser_state->aml);
+				parser_state->aml++;
+
+				switch (opcode) {
+				case AML_BYTE_OP:	/* AML_BYTEDATA_ARG */
+
+					buffer_length =
+					    ACPI_GET8(parser_state->aml);
+					parser_state->aml += 1;
+					break;
+
+				case AML_WORD_OP:	/* AML_WORDDATA_ARG */
+
+					buffer_length =
+					    ACPI_GET16(parser_state->aml);
+					parser_state->aml += 2;
+					break;
+
+				case AML_DWORD_OP:	/* AML_DWORDATA_ARG */
+
+					buffer_length =
+					    ACPI_GET32(parser_state->aml);
+					parser_state->aml += 4;
+					break;
+
+				default:
+
+					buffer_length = 0;
+					break;
+				}
+
+				/* Fill in bytelist data */
+
+				arg->named.value.size = buffer_length;
+				arg->named.data = parser_state->aml;
+			}
+
+			/* Skip to End of byte data */
+
+			parser_state->aml = pkg_end;
+		} else {
+			arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP);
+			if (!arg) {
+				acpi_ps_free_op(field);
+				return_PTR(NULL);
+			}
+
+			/* Get the Namestring argument */
+
+			arg->common.value.name =
+			    acpi_ps_get_next_namestring(parser_state);
+		}
+
+		/* Link the buffer/namestring to parent (CONNECTION_OP) */
+
+		acpi_ps_append_arg(field, arg);
+		break;
+
+	default:
+
+		/* Opcode was set in previous switch */
+		break;
+	}
+
+	return_PTR(field);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_get_next_arg
+ *
+ * PARAMETERS:  walk_state          - Current state
+ *              parser_state        - Current parser state object
+ *              arg_type            - The argument type (AML_*_ARG)
+ *              return_arg          - Where the next arg is returned
+ *
+ * RETURN:      Status, and an op object containing the next argument.
+ *
+ * DESCRIPTION: Get next argument (including complex list arguments that require
+ *              pushing the parser stack)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ps_get_next_arg(struct acpi_walk_state *walk_state,
+		     struct acpi_parse_state *parser_state,
+		     u32 arg_type, union acpi_parse_object **return_arg)
+{
+	union acpi_parse_object *arg = NULL;
+	union acpi_parse_object *prev = NULL;
+	union acpi_parse_object *field;
+	u32 subop;
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE_PTR(ps_get_next_arg, parser_state);
+
+	switch (arg_type) {
+	case ARGP_BYTEDATA:
+	case ARGP_WORDDATA:
+	case ARGP_DWORDDATA:
+	case ARGP_CHARLIST:
+	case ARGP_NAME:
+	case ARGP_NAMESTRING:
+
+		/* Constants, strings, and namestrings are all the same size */
+
+		arg = acpi_ps_alloc_op(AML_BYTE_OP);
+		if (!arg) {
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
+		acpi_ps_get_next_simple_arg(parser_state, arg_type, arg);
+		break;
+
+	case ARGP_PKGLENGTH:
+
+		/* Package length, nothing returned */
+
+		parser_state->pkg_end =
+		    acpi_ps_get_next_package_end(parser_state);
+		break;
+
+	case ARGP_FIELDLIST:
+
+		if (parser_state->aml < parser_state->pkg_end) {
+
+			/* Non-empty list */
+
+			while (parser_state->aml < parser_state->pkg_end) {
+				field = acpi_ps_get_next_field(parser_state);
+				if (!field) {
+					return_ACPI_STATUS(AE_NO_MEMORY);
+				}
+
+				if (prev) {
+					prev->common.next = field;
+				} else {
+					arg = field;
+				}
+				prev = field;
+			}
+
+			/* Skip to End of byte data */
+
+			parser_state->aml = parser_state->pkg_end;
+		}
+		break;
+
+	case ARGP_BYTELIST:
+
+		if (parser_state->aml < parser_state->pkg_end) {
+
+			/* Non-empty list */
+
+			arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP);
+			if (!arg) {
+				return_ACPI_STATUS(AE_NO_MEMORY);
+			}
+
+			/* Fill in bytelist data */
+
+			arg->common.value.size = (u32)
+			    ACPI_PTR_DIFF(parser_state->pkg_end,
+					  parser_state->aml);
+			arg->named.data = parser_state->aml;
+
+			/* Skip to End of byte data */
+
+			parser_state->aml = parser_state->pkg_end;
+		}
+		break;
+
+	case ARGP_TARGET:
+	case ARGP_SUPERNAME:
+	case ARGP_SIMPLENAME:
+
+		subop = acpi_ps_peek_opcode(parser_state);
+		if (subop == 0 ||
+		    acpi_ps_is_leading_char(subop) ||
+		    ACPI_IS_ROOT_PREFIX(subop) ||
+		    ACPI_IS_PARENT_PREFIX(subop)) {
+
+			/* null_name or name_string */
+
+			arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP);
+			if (!arg) {
+				return_ACPI_STATUS(AE_NO_MEMORY);
+			}
+
+			/* To support super_name arg of Unload */
+
+			if (walk_state->opcode == AML_UNLOAD_OP) {
+				status =
+				    acpi_ps_get_next_namepath(walk_state,
+							      parser_state, arg,
+							      1);
+
+				/*
+				 * If the super_name arg of Unload is a method call,
+				 * we have restored the AML pointer, just free this Arg
+				 */
+				if (arg->common.aml_opcode ==
+				    AML_INT_METHODCALL_OP) {
+					acpi_ps_free_op(arg);
+					arg = NULL;
+				}
+			} else {
+				status =
+				    acpi_ps_get_next_namepath(walk_state,
+							      parser_state, arg,
+							      0);
+			}
+		} else {
+			/* Single complex argument, nothing returned */
+
+			walk_state->arg_count = 1;
+		}
+		break;
+
+	case ARGP_DATAOBJ:
+	case ARGP_TERMARG:
+
+		/* Single complex argument, nothing returned */
+
+		walk_state->arg_count = 1;
+		break;
+
+	case ARGP_DATAOBJLIST:
+	case ARGP_TERMLIST:
+	case ARGP_OBJLIST:
+
+		if (parser_state->aml < parser_state->pkg_end) {
+
+			/* Non-empty list of variable arguments, nothing returned */
+
+			walk_state->arg_count = ACPI_VAR_ARGS;
+		}
+		break;
+
+	default:
+
+		ACPI_ERROR((AE_INFO, "Invalid ArgType: 0x%X", arg_type));
+		status = AE_AML_OPERAND_TYPE;
+		break;
+	}
+
+	*return_arg = arg;
+	return_ACPI_STATUS(status);
+}