Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 830 insertions, 0 deletions

diff --git a/kernel/drivers/acpi/acpica/utresrc.c b/kernel/drivers/acpi/acpica/utresrc.c
new file mode 100644
index 000000000..b3505dbc7
--- /dev/null
+++ b/kernel/drivers/acpi/acpica/utresrc.c
@@ -0,0 +1,830 @@
+/*******************************************************************************
+ *
+ * Module Name: utresrc - Resource management utilities
+ *
+ ******************************************************************************/
+
+/*
+ * 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 "acresrc.h"
+
+#define _COMPONENT          ACPI_UTILITIES
+ACPI_MODULE_NAME("utresrc")
+
+#if defined(ACPI_DEBUG_OUTPUT) || defined (ACPI_DISASSEMBLER) || defined (ACPI_DEBUGGER)
+/*
+ * Strings used to decode resource descriptors.
+ * Used by both the disassembler and the debugger resource dump routines
+ */
+const char *acpi_gbl_bm_decode[] = {
+	"NotBusMaster",
+	"BusMaster"
+};
+
+const char *acpi_gbl_config_decode[] = {
+	"0 - Good Configuration",
+	"1 - Acceptable Configuration",
+	"2 - Suboptimal Configuration",
+	"3 - ***Invalid Configuration***",
+};
+
+const char *acpi_gbl_consume_decode[] = {
+	"ResourceProducer",
+	"ResourceConsumer"
+};
+
+const char *acpi_gbl_dec_decode[] = {
+	"PosDecode",
+	"SubDecode"
+};
+
+const char *acpi_gbl_he_decode[] = {
+	"Level",
+	"Edge"
+};
+
+const char *acpi_gbl_io_decode[] = {
+	"Decode10",
+	"Decode16"
+};
+
+const char *acpi_gbl_ll_decode[] = {
+	"ActiveHigh",
+	"ActiveLow",
+	"ActiveBoth",
+	"Reserved"
+};
+
+const char *acpi_gbl_max_decode[] = {
+	"MaxNotFixed",
+	"MaxFixed"
+};
+
+const char *acpi_gbl_mem_decode[] = {
+	"NonCacheable",
+	"Cacheable",
+	"WriteCombining",
+	"Prefetchable"
+};
+
+const char *acpi_gbl_min_decode[] = {
+	"MinNotFixed",
+	"MinFixed"
+};
+
+const char *acpi_gbl_mtp_decode[] = {
+	"AddressRangeMemory",
+	"AddressRangeReserved",
+	"AddressRangeACPI",
+	"AddressRangeNVS"
+};
+
+const char *acpi_gbl_rng_decode[] = {
+	"InvalidRanges",
+	"NonISAOnlyRanges",
+	"ISAOnlyRanges",
+	"EntireRange"
+};
+
+const char *acpi_gbl_rw_decode[] = {
+	"ReadOnly",
+	"ReadWrite"
+};
+
+const char *acpi_gbl_shr_decode[] = {
+	"Exclusive",
+	"Shared",
+	"ExclusiveAndWake",	/* ACPI 5.0 */
+	"SharedAndWake"		/* ACPI 5.0 */
+};
+
+const char *acpi_gbl_siz_decode[] = {
+	"Transfer8",
+	"Transfer8_16",
+	"Transfer16",
+	"InvalidSize"
+};
+
+const char *acpi_gbl_trs_decode[] = {
+	"DenseTranslation",
+	"SparseTranslation"
+};
+
+const char *acpi_gbl_ttp_decode[] = {
+	"TypeStatic",
+	"TypeTranslation"
+};
+
+const char *acpi_gbl_typ_decode[] = {
+	"Compatibility",
+	"TypeA",
+	"TypeB",
+	"TypeF"
+};
+
+const char *acpi_gbl_ppc_decode[] = {
+	"PullDefault",
+	"PullUp",
+	"PullDown",
+	"PullNone"
+};
+
+const char *acpi_gbl_ior_decode[] = {
+	"IoRestrictionNone",
+	"IoRestrictionInputOnly",
+	"IoRestrictionOutputOnly",
+	"IoRestrictionNoneAndPreserve"
+};
+
+const char *acpi_gbl_dts_decode[] = {
+	"Width8bit",
+	"Width16bit",
+	"Width32bit",
+	"Width64bit",
+	"Width128bit",
+	"Width256bit",
+};
+
+/* GPIO connection type */
+
+const char *acpi_gbl_ct_decode[] = {
+	"Interrupt",
+	"I/O"
+};
+
+/* Serial bus type */
+
+const char *acpi_gbl_sbt_decode[] = {
+	"/* UNKNOWN serial bus type */",
+	"I2C",
+	"SPI",
+	"UART"
+};
+
+/* I2C serial bus access mode */
+
+const char *acpi_gbl_am_decode[] = {
+	"AddressingMode7Bit",
+	"AddressingMode10Bit"
+};
+
+/* I2C serial bus slave mode */
+
+const char *acpi_gbl_sm_decode[] = {
+	"ControllerInitiated",
+	"DeviceInitiated"
+};
+
+/* SPI serial bus wire mode */
+
+const char *acpi_gbl_wm_decode[] = {
+	"FourWireMode",
+	"ThreeWireMode"
+};
+
+/* SPI serial clock phase */
+
+const char *acpi_gbl_cph_decode[] = {
+	"ClockPhaseFirst",
+	"ClockPhaseSecond"
+};
+
+/* SPI serial bus clock polarity */
+
+const char *acpi_gbl_cpo_decode[] = {
+	"ClockPolarityLow",
+	"ClockPolarityHigh"
+};
+
+/* SPI serial bus device polarity */
+
+const char *acpi_gbl_dp_decode[] = {
+	"PolarityLow",
+	"PolarityHigh"
+};
+
+/* UART serial bus endian */
+
+const char *acpi_gbl_ed_decode[] = {
+	"LittleEndian",
+	"BigEndian"
+};
+
+/* UART serial bus bits per byte */
+
+const char *acpi_gbl_bpb_decode[] = {
+	"DataBitsFive",
+	"DataBitsSix",
+	"DataBitsSeven",
+	"DataBitsEight",
+	"DataBitsNine",
+	"/* UNKNOWN Bits per byte */",
+	"/* UNKNOWN Bits per byte */",
+	"/* UNKNOWN Bits per byte */"
+};
+
+/* UART serial bus stop bits */
+
+const char *acpi_gbl_sb_decode[] = {
+	"StopBitsZero",
+	"StopBitsOne",
+	"StopBitsOnePlusHalf",
+	"StopBitsTwo"
+};
+
+/* UART serial bus flow control */
+
+const char *acpi_gbl_fc_decode[] = {
+	"FlowControlNone",
+	"FlowControlHardware",
+	"FlowControlXON",
+	"/* UNKNOWN flow control keyword */"
+};
+
+/* UART serial bus parity type */
+
+const char *acpi_gbl_pt_decode[] = {
+	"ParityTypeNone",
+	"ParityTypeEven",
+	"ParityTypeOdd",
+	"ParityTypeMark",
+	"ParityTypeSpace",
+	"/* UNKNOWN parity keyword */",
+	"/* UNKNOWN parity keyword */",
+	"/* UNKNOWN parity keyword */"
+};
+
+#endif
+
+/*
+ * Base sizes of the raw AML resource descriptors, indexed by resource type.
+ * Zero indicates a reserved (and therefore invalid) resource type.
+ */
+const u8 acpi_gbl_resource_aml_sizes[] = {
+	/* Small descriptors */
+
+	0,
+	0,
+	0,
+	0,
+	ACPI_AML_SIZE_SMALL(struct aml_resource_irq),
+	ACPI_AML_SIZE_SMALL(struct aml_resource_dma),
+	ACPI_AML_SIZE_SMALL(struct aml_resource_start_dependent),
+	ACPI_AML_SIZE_SMALL(struct aml_resource_end_dependent),
+	ACPI_AML_SIZE_SMALL(struct aml_resource_io),
+	ACPI_AML_SIZE_SMALL(struct aml_resource_fixed_io),
+	ACPI_AML_SIZE_SMALL(struct aml_resource_fixed_dma),
+	0,
+	0,
+	0,
+	ACPI_AML_SIZE_SMALL(struct aml_resource_vendor_small),
+	ACPI_AML_SIZE_SMALL(struct aml_resource_end_tag),
+
+	/* Large descriptors */
+
+	0,
+	ACPI_AML_SIZE_LARGE(struct aml_resource_memory24),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_generic_register),
+	0,
+	ACPI_AML_SIZE_LARGE(struct aml_resource_vendor_large),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_memory32),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_fixed_memory32),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_address32),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_address16),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_extended_irq),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_address64),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_extended_address64),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_gpio),
+	0,
+	ACPI_AML_SIZE_LARGE(struct aml_resource_common_serialbus),
+};
+
+const u8 acpi_gbl_resource_aml_serial_bus_sizes[] = {
+	0,
+	ACPI_AML_SIZE_LARGE(struct aml_resource_i2c_serialbus),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_spi_serialbus),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_uart_serialbus),
+};
+
+/*
+ * Resource types, used to validate the resource length field.
+ * The length of fixed-length types must match exactly, variable
+ * lengths must meet the minimum required length, etc.
+ * Zero indicates a reserved (and therefore invalid) resource type.
+ */
+static const u8 acpi_gbl_resource_types[] = {
+	/* Small descriptors */
+
+	0,
+	0,
+	0,
+	0,
+	ACPI_SMALL_VARIABLE_LENGTH,	/* 04 IRQ */
+	ACPI_FIXED_LENGTH,	/* 05 DMA */
+	ACPI_SMALL_VARIABLE_LENGTH,	/* 06 start_dependent_functions */
+	ACPI_FIXED_LENGTH,	/* 07 end_dependent_functions */
+	ACPI_FIXED_LENGTH,	/* 08 IO */
+	ACPI_FIXED_LENGTH,	/* 09 fixed_IO */
+	ACPI_FIXED_LENGTH,	/* 0A fixed_DMA */
+	0,
+	0,
+	0,
+	ACPI_VARIABLE_LENGTH,	/* 0E vendor_short */
+	ACPI_FIXED_LENGTH,	/* 0F end_tag */
+
+	/* Large descriptors */
+
+	0,
+	ACPI_FIXED_LENGTH,	/* 01 Memory24 */
+	ACPI_FIXED_LENGTH,	/* 02 generic_register */
+	0,
+	ACPI_VARIABLE_LENGTH,	/* 04 vendor_long */
+	ACPI_FIXED_LENGTH,	/* 05 Memory32 */
+	ACPI_FIXED_LENGTH,	/* 06 memory32_fixed */
+	ACPI_VARIABLE_LENGTH,	/* 07 Dword* address */
+	ACPI_VARIABLE_LENGTH,	/* 08 Word* address */
+	ACPI_VARIABLE_LENGTH,	/* 09 extended_IRQ */
+	ACPI_VARIABLE_LENGTH,	/* 0A Qword* address */
+	ACPI_FIXED_LENGTH,	/* 0B Extended* address */
+	ACPI_VARIABLE_LENGTH,	/* 0C Gpio* */
+	0,
+	ACPI_VARIABLE_LENGTH	/* 0E *serial_bus */
+};
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_walk_aml_resources
+ *
+ * PARAMETERS:  walk_state          - Current walk info
+ * PARAMETERS:  aml                 - Pointer to the raw AML resource template
+ *              aml_length          - Length of the entire template
+ *              user_function       - Called once for each descriptor found. If
+ *                                    NULL, a pointer to the end_tag is returned
+ *              context             - Passed to user_function
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Walk a raw AML resource list(buffer). User function called
+ *              once for each resource found.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_walk_aml_resources(struct acpi_walk_state *walk_state,
+			   u8 *aml,
+			   acpi_size aml_length,
+			   acpi_walk_aml_callback user_function, void **context)
+{
+	acpi_status status;
+	u8 *end_aml;
+	u8 resource_index;
+	u32 length;
+	u32 offset = 0;
+	u8 end_tag[2] = { 0x79, 0x00 };
+
+	ACPI_FUNCTION_TRACE(ut_walk_aml_resources);
+
+	/* The absolute minimum resource template is one end_tag descriptor */
+
+	if (aml_length < sizeof(struct aml_resource_end_tag)) {
+		return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
+	}
+
+	/* Point to the end of the resource template buffer */
+
+	end_aml = aml + aml_length;
+
+	/* Walk the byte list, abort on any invalid descriptor type or length */
+
+	while (aml < end_aml) {
+
+		/* Validate the Resource Type and Resource Length */
+
+		status =
+		    acpi_ut_validate_resource(walk_state, aml, &resource_index);
+		if (ACPI_FAILURE(status)) {
+			/*
+			 * Exit on failure. Cannot continue because the descriptor length
+			 * may be bogus also.
+			 */
+			return_ACPI_STATUS(status);
+		}
+
+		/* Get the length of this descriptor */
+
+		length = acpi_ut_get_descriptor_length(aml);
+
+		/* Invoke the user function */
+
+		if (user_function) {
+			status =
+			    user_function(aml, length, offset, resource_index,
+					  context);
+			if (ACPI_FAILURE(status)) {
+				return_ACPI_STATUS(status);
+			}
+		}
+
+		/* An end_tag descriptor terminates this resource template */
+
+		if (acpi_ut_get_resource_type(aml) ==
+		    ACPI_RESOURCE_NAME_END_TAG) {
+			/*
+			 * There must be at least one more byte in the buffer for
+			 * the 2nd byte of the end_tag
+			 */
+			if ((aml + 1) >= end_aml) {
+				return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
+			}
+
+			/* Return the pointer to the end_tag if requested */
+
+			if (!user_function) {
+				*context = aml;
+			}
+
+			/* Normal exit */
+
+			return_ACPI_STATUS(AE_OK);
+		}
+
+		aml += length;
+		offset += length;
+	}
+
+	/* Did not find an end_tag descriptor */
+
+	if (user_function) {
+
+		/* Insert an end_tag anyway. acpi_rs_get_list_length always leaves room */
+
+		(void)acpi_ut_validate_resource(walk_state, end_tag,
+						&resource_index);
+		status =
+		    user_function(end_tag, 2, offset, resource_index, context);
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+	}
+
+	return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_validate_resource
+ *
+ * PARAMETERS:  walk_state          - Current walk info
+ *              aml                 - Pointer to the raw AML resource descriptor
+ *              return_index        - Where the resource index is returned. NULL
+ *                                    if the index is not required.
+ *
+ * RETURN:      Status, and optionally the Index into the global resource tables
+ *
+ * DESCRIPTION: Validate an AML resource descriptor by checking the Resource
+ *              Type and Resource Length. Returns an index into the global
+ *              resource information/dispatch tables for later use.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_validate_resource(struct acpi_walk_state *walk_state,
+			  void *aml, u8 *return_index)
+{
+	union aml_resource *aml_resource;
+	u8 resource_type;
+	u8 resource_index;
+	acpi_rs_length resource_length;
+	acpi_rs_length minimum_resource_length;
+
+	ACPI_FUNCTION_ENTRY();
+
+	/*
+	 * 1) Validate the resource_type field (Byte 0)
+	 */
+	resource_type = ACPI_GET8(aml);
+
+	/*
+	 * Byte 0 contains the descriptor name (Resource Type)
+	 * Examine the large/small bit in the resource header
+	 */
+	if (resource_type & ACPI_RESOURCE_NAME_LARGE) {
+
+		/* Verify the large resource type (name) against the max */
+
+		if (resource_type > ACPI_RESOURCE_NAME_LARGE_MAX) {
+			goto invalid_resource;
+		}
+
+		/*
+		 * Large Resource Type -- bits 6:0 contain the name
+		 * Translate range 0x80-0x8B to index range 0x10-0x1B
+		 */
+		resource_index = (u8) (resource_type - 0x70);
+	} else {
+		/*
+		 * Small Resource Type -- bits 6:3 contain the name
+		 * Shift range to index range 0x00-0x0F
+		 */
+		resource_index = (u8)
+		    ((resource_type & ACPI_RESOURCE_NAME_SMALL_MASK) >> 3);
+	}
+
+	/*
+	 * Check validity of the resource type, via acpi_gbl_resource_types. Zero
+	 * indicates an invalid resource.
+	 */
+	if (!acpi_gbl_resource_types[resource_index]) {
+		goto invalid_resource;
+	}
+
+	/*
+	 * Validate the resource_length field. This ensures that the length
+	 * is at least reasonable, and guarantees that it is non-zero.
+	 */
+	resource_length = acpi_ut_get_resource_length(aml);
+	minimum_resource_length = acpi_gbl_resource_aml_sizes[resource_index];
+
+	/* Validate based upon the type of resource - fixed length or variable */
+
+	switch (acpi_gbl_resource_types[resource_index]) {
+	case ACPI_FIXED_LENGTH:
+
+		/* Fixed length resource, length must match exactly */
+
+		if (resource_length != minimum_resource_length) {
+			goto bad_resource_length;
+		}
+		break;
+
+	case ACPI_VARIABLE_LENGTH:
+
+		/* Variable length resource, length must be at least the minimum */
+
+		if (resource_length < minimum_resource_length) {
+			goto bad_resource_length;
+		}
+		break;
+
+	case ACPI_SMALL_VARIABLE_LENGTH:
+
+		/* Small variable length resource, length can be (Min) or (Min-1) */
+
+		if ((resource_length > minimum_resource_length) ||
+		    (resource_length < (minimum_resource_length - 1))) {
+			goto bad_resource_length;
+		}
+		break;
+
+	default:
+
+		/* Shouldn't happen (because of validation earlier), but be sure */
+
+		goto invalid_resource;
+	}
+
+	aml_resource = ACPI_CAST_PTR(union aml_resource, aml);
+	if (resource_type == ACPI_RESOURCE_NAME_SERIAL_BUS) {
+
+		/* Validate the bus_type field */
+
+		if ((aml_resource->common_serial_bus.type == 0) ||
+		    (aml_resource->common_serial_bus.type >
+		     AML_RESOURCE_MAX_SERIALBUSTYPE)) {
+			if (walk_state) {
+				ACPI_ERROR((AE_INFO,
+					    "Invalid/unsupported SerialBus resource descriptor: BusType 0x%2.2X",
+					    aml_resource->common_serial_bus.
+					    type));
+			}
+			return (AE_AML_INVALID_RESOURCE_TYPE);
+		}
+	}
+
+	/* Optionally return the resource table index */
+
+	if (return_index) {
+		*return_index = resource_index;
+	}
+
+	return (AE_OK);
+
+invalid_resource:
+
+	if (walk_state) {
+		ACPI_ERROR((AE_INFO,
+			    "Invalid/unsupported resource descriptor: Type 0x%2.2X",
+			    resource_type));
+	}
+	return (AE_AML_INVALID_RESOURCE_TYPE);
+
+bad_resource_length:
+
+	if (walk_state) {
+		ACPI_ERROR((AE_INFO,
+			    "Invalid resource descriptor length: Type "
+			    "0x%2.2X, Length 0x%4.4X, MinLength 0x%4.4X",
+			    resource_type, resource_length,
+			    minimum_resource_length));
+	}
+	return (AE_AML_BAD_RESOURCE_LENGTH);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_resource_type
+ *
+ * PARAMETERS:  aml             - Pointer to the raw AML resource descriptor
+ *
+ * RETURN:      The Resource Type with no extraneous bits (except the
+ *              Large/Small descriptor bit -- this is left alone)
+ *
+ * DESCRIPTION: Extract the Resource Type/Name from the first byte of
+ *              a resource descriptor.
+ *
+ ******************************************************************************/
+
+u8 acpi_ut_get_resource_type(void *aml)
+{
+	ACPI_FUNCTION_ENTRY();
+
+	/*
+	 * Byte 0 contains the descriptor name (Resource Type)
+	 * Examine the large/small bit in the resource header
+	 */
+	if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) {
+
+		/* Large Resource Type -- bits 6:0 contain the name */
+
+		return (ACPI_GET8(aml));
+	} else {
+		/* Small Resource Type -- bits 6:3 contain the name */
+
+		return ((u8) (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_SMALL_MASK));
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_resource_length
+ *
+ * PARAMETERS:  aml             - Pointer to the raw AML resource descriptor
+ *
+ * RETURN:      Byte Length
+ *
+ * DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By
+ *              definition, this does not include the size of the descriptor
+ *              header or the length field itself.
+ *
+ ******************************************************************************/
+
+u16 acpi_ut_get_resource_length(void *aml)
+{
+	acpi_rs_length resource_length;
+
+	ACPI_FUNCTION_ENTRY();
+
+	/*
+	 * Byte 0 contains the descriptor name (Resource Type)
+	 * Examine the large/small bit in the resource header
+	 */
+	if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) {
+
+		/* Large Resource type -- bytes 1-2 contain the 16-bit length */
+
+		ACPI_MOVE_16_TO_16(&resource_length, ACPI_ADD_PTR(u8, aml, 1));
+
+	} else {
+		/* Small Resource type -- bits 2:0 of byte 0 contain the length */
+
+		resource_length = (u16) (ACPI_GET8(aml) &
+					 ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
+	}
+
+	return (resource_length);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_resource_header_length
+ *
+ * PARAMETERS:  aml             - Pointer to the raw AML resource descriptor
+ *
+ * RETURN:      Length of the AML header (depends on large/small descriptor)
+ *
+ * DESCRIPTION: Get the length of the header for this resource.
+ *
+ ******************************************************************************/
+
+u8 acpi_ut_get_resource_header_length(void *aml)
+{
+	ACPI_FUNCTION_ENTRY();
+
+	/* Examine the large/small bit in the resource header */
+
+	if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) {
+		return (sizeof(struct aml_resource_large_header));
+	} else {
+		return (sizeof(struct aml_resource_small_header));
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_descriptor_length
+ *
+ * PARAMETERS:  aml             - Pointer to the raw AML resource descriptor
+ *
+ * RETURN:      Byte length
+ *
+ * DESCRIPTION: Get the total byte length of a raw AML descriptor, including the
+ *              length of the descriptor header and the length field itself.
+ *              Used to walk descriptor lists.
+ *
+ ******************************************************************************/
+
+u32 acpi_ut_get_descriptor_length(void *aml)
+{
+	ACPI_FUNCTION_ENTRY();
+
+	/*
+	 * Get the Resource Length (does not include header length) and add
+	 * the header length (depends on if this is a small or large resource)
+	 */
+	return (acpi_ut_get_resource_length(aml) +
+		acpi_ut_get_resource_header_length(aml));
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_resource_end_tag
+ *
+ * PARAMETERS:  obj_desc        - The resource template buffer object
+ *              end_tag         - Where the pointer to the end_tag is returned
+ *
+ * RETURN:      Status, pointer to the end tag
+ *
+ * DESCRIPTION: Find the end_tag resource descriptor in an AML resource template
+ *              Note: allows a buffer length of zero.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_get_resource_end_tag(union acpi_operand_object *obj_desc, u8 **end_tag)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ut_get_resource_end_tag);
+
+	/* Allow a buffer length of zero */
+
+	if (!obj_desc->buffer.length) {
+		*end_tag = obj_desc->buffer.pointer;
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Validate the template and get a pointer to the end_tag */
+
+	status = acpi_ut_walk_aml_resources(NULL, obj_desc->buffer.pointer,
+					    obj_desc->buffer.length, NULL,
+					    (void **)end_tag);
+
+	return_ACPI_STATUS(status);
+}