[ACPI] ACPICA 20051102

Modified the subsystem initialization sequence to improve
GPE support. The GPE initialization has been split into
two parts in order to defer execution of the _PRW methods
(Power Resources for Wake) until after the hardware is
fully initialized and the SCI handler is installed. This
allows the _PRW methods to access fields protected by the
Global Lock. This will fix systems where a NO_GLOBAL_LOCK
exception has been seen during initialization.

Fixed a regression with the ConcatenateResTemplate()
ASL operator introduced in the 20051021 release.

Implemented support for "local" internal ACPI object
types within the debugger "Object" command and the
acpi_walk_namespace() external interfaces. These local
types include RegionFields, BankFields, IndexFields, Alias,
and reference objects.

Moved common AML resource handling code into a new file,
"utresrc.c". This code is shared by both the Resource
Manager and the AML Debugger.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

5 files changed, 470 insertions, 165 deletions

diff --git a/drivers/acpi/utilities/Makefile b/drivers/acpi/utilities/Makefile
index e87108b7338a..88eff14c4894 100644
--- a/drivers/acpi/utilities/Makefile
+++ b/drivers/acpi/utilities/Makefile
@@ -2,7 +2,8 @@
 # Makefile for all Linux ACPI interpreter subdirectories
 #
 
-obj-y := utalloc.o  utdebug.o   uteval.o    utinit.o  utmisc.o    utxface.o \
-	 utcopy.o   utdelete.o  utglobal.o  utmath.o  utobject.o utstate.o utmutex.o utobject.o utcache.o
+obj-y := utalloc.o utdebug.o uteval.o utinit.o utmisc.o utxface.o \
+		utcopy.o utdelete.o utglobal.o utmath.o utobject.o \
+		utstate.o utmutex.o utobject.o utcache.o utresrc.o
 
 EXTRA_CFLAGS += $(ACPI_CFLAGS)
diff --git a/drivers/acpi/utilities/utmisc.c b/drivers/acpi/utilities/utmisc.c
index e9058d4da122..2a9110c06391 100644
--- a/drivers/acpi/utilities/utmisc.c
+++ b/drivers/acpi/utilities/utmisc.c
@@ -43,7 +43,6 @@
 
 #include <acpi/acpi.h>
 #include <acpi/acnamesp.h>
-#include <acpi/amlresrc.h>
 
 #define _COMPONENT          ACPI_UTILITIES
 ACPI_MODULE_NAME("utmisc")
@@ -791,153 +790,6 @@ u8 acpi_ut_generate_checksum(u8 * buffer, u32 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)
-	 * Determine if this is a small or large resource
-	 */
-	if (*((u8 *) aml) & ACPI_RESOURCE_NAME_LARGE) {
-		/* Large Resource Type -- bits 6:0 contain the name */
-
-		return (*((u8 *) aml));
-	} else {
-		/* Small Resource Type -- bits 6:3 contain the name */
-
-		return ((u8) (*((u8 *) 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)
-{
-	u16 resource_length;
-
-	ACPI_FUNCTION_ENTRY();
-
-	/*
-	 * Byte 0 contains the descriptor name (Resource Type)
-	 * Determine if this is a small or large resource
-	 */
-	if (*((u8 *) aml) & ACPI_RESOURCE_NAME_LARGE) {
-		/* Large Resource type -- bytes 1-2 contain the 16-bit length */
-
-		ACPI_MOVE_16_TO_16(&resource_length, &((u8 *) aml)[1]);
-
-	} else {
-		/* Small Resource type -- bits 2:0 of byte 0 contain the length */
-
-		resource_length = (u16) (*((u8 *) aml) &
-					 ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
-	}
-
-	return (resource_length);
-}
-
-/*******************************************************************************
- *
- * 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)
-{
-	u32 descriptor_length;
-
-	ACPI_FUNCTION_ENTRY();
-
-	/* First get the Resource Length (Does not include header length) */
-
-	descriptor_length = acpi_ut_get_resource_length(aml);
-
-	/* Determine if this is a small or large resource */
-
-	if (*((u8 *) aml) & ACPI_RESOURCE_NAME_LARGE) {
-		descriptor_length += sizeof(struct aml_resource_large_header);
-	} else {
-		descriptor_length += sizeof(struct aml_resource_small_header);
-	}
-
-	return (descriptor_length);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ut_get_resource_end_tag
- *
- * PARAMETERS:  obj_desc        - The resource template buffer object
- *
- * RETURN:      Pointer to the end tag
- *
- * DESCRIPTION: Find the END_TAG resource descriptor in an AML resource template
- *
- ******************************************************************************/
-
-u8 *acpi_ut_get_resource_end_tag(union acpi_operand_object * obj_desc)
-{
-	u8 *aml;
-	u8 *end_aml;
-
-	aml = obj_desc->buffer.pointer;
-	end_aml = aml + obj_desc->buffer.length;
-
-	/* Walk the resource template, one descriptor per loop */
-
-	while (aml < end_aml) {
-		if (acpi_ut_get_resource_type(aml) ==
-		    ACPI_RESOURCE_NAME_END_TAG) {
-			/* Found the end_tag descriptor, all done */
-
-			return (aml);
-		}
-
-		/* Point to the next resource descriptor */
-
-		aml += acpi_ut_get_resource_length(aml);
-	}
-
-	/* End tag was not found */
-
-	return (NULL);
-}
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_ut_report_error
  *
  * PARAMETERS:  module_name         - Caller's module name (for error output)
diff --git a/drivers/acpi/utilities/utresrc.c b/drivers/acpi/utilities/utresrc.c
new file mode 100644
index 000000000000..07a314c710d8
--- /dev/null
+++ b/drivers/acpi/utilities/utresrc.c
@@ -0,0 +1,428 @@
+/*******************************************************************************
+ *
+ * Module Name: utresrc - Resource managment utilities
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * 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 <acpi/amlresrc.h>
+
+#define _COMPONENT          ACPI_UTILITIES
+ACPI_MODULE_NAME("utmisc")
+
+/*
+ * 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),
+	0,
+	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)
+};
+
+/*
+ * 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,
+	ACPI_FIXED_LENGTH,
+	ACPI_SMALL_VARIABLE_LENGTH,
+	ACPI_FIXED_LENGTH,
+	ACPI_FIXED_LENGTH,
+	ACPI_FIXED_LENGTH,
+	0,
+	0,
+	0,
+	0,
+	ACPI_VARIABLE_LENGTH,
+	ACPI_FIXED_LENGTH,
+
+	/* Large descriptors */
+
+	0,
+	ACPI_FIXED_LENGTH,
+	ACPI_FIXED_LENGTH,
+	0,
+	ACPI_VARIABLE_LENGTH,
+	ACPI_FIXED_LENGTH,
+	ACPI_FIXED_LENGTH,
+	ACPI_VARIABLE_LENGTH,
+	ACPI_VARIABLE_LENGTH,
+	ACPI_VARIABLE_LENGTH,
+	ACPI_VARIABLE_LENGTH,
+	ACPI_FIXED_LENGTH
+};
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_validate_resource
+ *
+ * PARAMETERS:  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(void *aml, u8 * return_index)
+{
+	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 = *((u8 *) 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) {
+			return (AE_AML_INVALID_RESOURCE_TYPE);
+		}
+
+		/*
+		 * 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, zero indicates name is invalid */
+
+	if (!acpi_gbl_resource_types[resource_index]) {
+		return (AE_AML_INVALID_RESOURCE_TYPE);
+	}
+
+	/*
+	 * 2) 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) {
+			return (AE_AML_BAD_RESOURCE_LENGTH);
+		}
+		break;
+
+	case ACPI_VARIABLE_LENGTH:
+
+		/* Variable length resource, length must be at least the minimum */
+
+		if (resource_length < minimum_resource_length) {
+			return (AE_AML_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))) {
+			return (AE_AML_BAD_RESOURCE_LENGTH);
+		}
+		break;
+
+	default:
+
+		/* Shouldn't happen (because of validation earlier), but be sure */
+
+		return (AE_AML_INVALID_RESOURCE_TYPE);
+	}
+
+	/* Optionally return the resource table index */
+
+	if (return_index) {
+		*return_index = resource_index;
+	}
+
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * 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 (*((u8 *) aml) & ACPI_RESOURCE_NAME_LARGE) {
+		/* Large Resource Type -- bits 6:0 contain the name */
+
+		return (*((u8 *) aml));
+	} else {
+		/* Small Resource Type -- bits 6:3 contain the name */
+
+		return ((u8) (*((u8 *) 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 (*((u8 *) aml) & ACPI_RESOURCE_NAME_LARGE) {
+		/* Large Resource type -- bytes 1-2 contain the 16-bit length */
+
+		ACPI_MOVE_16_TO_16(&resource_length, &((u8 *) aml)[1]);
+
+	} else {
+		/* Small Resource type -- bits 2:0 of byte 0 contain the length */
+
+		resource_length = (u16) (*((u8 *) 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 (*((u8 *) 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
+ *
+ * RETURN:      Pointer to the end tag
+ *
+ * DESCRIPTION: Find the end_tag resource descriptor in an AML resource template
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_get_resource_end_tag(union acpi_operand_object * obj_desc,
+			     u8 ** end_tag)
+{
+	acpi_status status;
+	u8 *aml;
+	u8 *end_aml;
+
+	ACPI_FUNCTION_TRACE("ut_get_resource_end_tag");
+
+	/* Get start and end pointers */
+
+	aml = obj_desc->buffer.pointer;
+	end_aml = aml + obj_desc->buffer.length;
+
+	/* Walk the resource template, one descriptor per iteration */
+
+	while (aml < end_aml) {
+		/* Validate the Resource Type and Resource Length */
+
+		status = acpi_ut_validate_resource(aml, NULL);
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+
+		/* end_tag resource indicates the end of the resource template */
+
+		if (acpi_ut_get_resource_type(aml) ==
+		    ACPI_RESOURCE_NAME_END_TAG) {
+			/* Return the pointer to the end_tag */
+
+			*end_tag = aml;
+			return_ACPI_STATUS(AE_OK);
+		}
+
+		/*
+		 * Point to the next resource descriptor in the AML buffer. The
+		 * descriptor length is guaranteed to be non-zero by resource
+		 * validation above.
+		 */
+		aml += acpi_ut_get_descriptor_length(aml);
+	}
+
+	/* Did not find an end_tag resource descriptor */
+
+	return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
+}
diff --git a/drivers/acpi/utilities/utstate.c b/drivers/acpi/utilities/utstate.c
index c1cb27583be8..6ff1d7073349 100644
--- a/drivers/acpi/utilities/utstate.c
+++ b/drivers/acpi/utilities/utstate.c
@@ -63,7 +63,7 @@ acpi_status
 acpi_ut_create_pkg_state_and_push(void *internal_object,
 				  void *external_object,
 				  u16 index,
-				  union acpi_generic_state ** state_list)
+				  union acpi_generic_state **state_list)
 {
 	union acpi_generic_state *state;
 
diff --git a/drivers/acpi/utilities/utxface.c b/drivers/acpi/utilities/utxface.c
index f06bd5e5e9d1..57adc5bc02f3 100644
--- a/drivers/acpi/utilities/utxface.c
+++ b/drivers/acpi/utilities/utxface.c
@@ -178,10 +178,14 @@ acpi_status acpi_enable_subsystem(u32 flags)
 	/*
 	 * Initialize ACPI Event handling (Fixed and General Purpose)
 	 *
-	 * NOTE: We must have the hardware AND events initialized before we can
-	 * execute ANY control methods SAFELY.  Any control method can require
-	 * ACPI hardware support, so the hardware MUST be initialized before
-	 * execution!
+	 * Note1: We must have the hardware and events initialized before we can
+	 * execute any control methods safely. Any control method can require
+	 * ACPI hardware support, so the hardware must be fully initialized before
+	 * any method execution!
+	 *
+	 * Note2: Fixed events are initialized and enabled here. GPEs are
+	 * initialized, but cannot be enabled until after the hardware is
+	 * completely initialized (SCI and global_lock activated)
 	 */
 	if (!(flags & ACPI_NO_EVENT_INIT)) {
 		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
@@ -193,8 +197,10 @@ acpi_status acpi_enable_subsystem(u32 flags)
 		}
 	}
 
-	/* Install the SCI handler and Global Lock handler */
-
+	/*
+	 * Install the SCI handler and Global Lock handler. This completes the
+	 * hardware initialization.
+	 */
 	if (!(flags & ACPI_NO_HANDLER_INIT)) {
 		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 				  "[Init] Installing SCI/GL handlers\n"));
@@ -205,6 +211,24 @@ acpi_status acpi_enable_subsystem(u32 flags)
 		}
 	}
 
+	/*
+	 * Complete the GPE initialization for the GPE blocks defined in the FADT
+	 * (GPE block 0 and 1).
+	 *
+	 * Note1: This is where the _PRW methods are executed for the GPEs. These
+	 * methods can only be executed after the SCI and Global Lock handlers are
+	 * installed and initialized.
+	 *
+	 * Note2: Currently, there seems to be no need to run the _REG methods
+	 * before execution of the _PRW methods and enabling of the GPEs.
+	 */
+	if (!(flags & ACPI_NO_EVENT_INIT)) {
+		status = acpi_ev_install_fadt_gpes();
+		if (ACPI_FAILURE(status)) {
+			return (status);
+		}
+	}
+
 	return_ACPI_STATUS(status);
 }
 
@@ -230,9 +254,9 @@ acpi_status acpi_initialize_objects(u32 flags)
 	/*
 	 * Run all _REG methods
 	 *
-	 * NOTE: Any objects accessed
-	 * by the _REG methods will be automatically initialized, even if they
-	 * contain executable AML (see call to acpi_ns_initialize_objects below).
+	 * Note: Any objects accessed by the _REG methods will be automatically
+	 * initialized, even if they contain executable AML (see the call to
+	 * acpi_ns_initialize_objects below).
 	 */
 	if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
 		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
@@ -245,9 +269,9 @@ acpi_status acpi_initialize_objects(u32 flags)
 	}
 
 	/*
-	 * Initialize the objects that remain uninitialized.  This
-	 * runs the executable AML that may be part of the declaration of these
-	 * objects: operation_regions, buffer_fields, Buffers, and Packages.
+	 * Initialize the objects that remain uninitialized. This runs the
+	 * executable AML that may be part of the declaration of these objects:
+	 * operation_regions, buffer_fields, Buffers, and Packages.
 	 */
 	if (!(flags & ACPI_NO_OBJECT_INIT)) {
 		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
@@ -260,8 +284,8 @@ acpi_status acpi_initialize_objects(u32 flags)
 	}
 
 	/*
-	 * Initialize all device objects in the namespace
-	 * This runs the _STA and _INI methods.
+	 * Initialize all device objects in the namespace. This runs the device
+	 * _STA and _INI methods.
 	 */
 	if (!(flags & ACPI_NO_DEVICE_INIT)) {
 		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,