Merge tag 'pm+acpi-4.4-rc1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management and ACPI updates from Rafael Wysocki:
 "Quite a new features are included this time.

  First off, the Collaborative Processor Performance Control interface
  (version 2) defined by ACPI will now be supported on ARM64 along with
  a cpufreq frontend for CPU performance scaling.

  Second, ACPI gets a new infrastructure for the early probing of IRQ
  chips and clock sources (along the lines of the existing similar
  mechanism for DT).

  Next, the ACPI core and the generic device properties API will now
  support a recently introduced hierarchical properties extension of the
  _DSD (Device Specific Data) ACPI device configuration object.  If the
  ACPI platform firmware uses that extension to organize device
  properties in a hierarchical way, the kernel will automatically handle
  it and make those properties available to device drivers via the
  generic device properties API.

  It also will be possible to build the ACPICA's AML interpreter
  debugger into the kernel now and use that to diagnose AML-related
  problems more efficiently.  In the future, this should make it
  possible to single-step AML execution and do similar things.
  Interesting stuff, although somewhat experimental at this point.

  Finally, the PM core gets a new mechanism that can be used by device
  drivers to distinguish between suspend-to-RAM (based on platform
  firmware support) and suspend-to-idle (or other variants of system
  suspend the platform firmware is not involved in) and possibly
  optimize their device suspend/resume handling accordingly.

  In addition to that, some existing features are re-organized quite
  substantially.

  First, the ACPI-based handling of PCI host bridges on x86 and ia64 is
  unified and the common code goes into the ACPI core (so as to reduce
  code duplication and eliminate non-essential differences between the
  two architectures in that area).

  Second, the Operating Performance Points (OPP) framework is
  reorganized to make the code easier to find and follow.

  Next, the cpufreq core's sysfs interface is reorganized to get rid of
  the "primary CPU" concept for configurations in which the same
  performance scaling settings are shared between multiple CPUs.

  Finally, some interfaces that aren't necessary any more are dropped
  from the generic power domains framework.

  On top of the above we have some minor extensions, cleanups and bug
  fixes in multiple places, as usual.

  Specifics:

   - ACPICA update to upstream revision 20150930 (Bob Moore, Lv Zheng).

     The most significant change is to allow the AML debugger to be
     built into the kernel.  On top of that there is an update related
     to the NFIT table (the ACPI persistent memory interface) and a few
     fixes and cleanups.

   - ACPI CPPC2 (Collaborative Processor Performance Control v2) support
     along with a cpufreq frontend (Ashwin Chaugule).

     This can only be enabled on ARM64 at this point.

   - New ACPI infrastructure for the early probing of IRQ chips and
     clock sources (Marc Zyngier).

   - Support for a new hierarchical properties extension of the ACPI
     _DSD (Device Specific Data) device configuration object allowing
     the kernel to handle hierarchical properties (provided by the
     platform firmware this way) automatically and make them available
     to device drivers via the generic device properties interface
     (Rafael Wysocki).

   - Generic device properties API extension to obtain an index of
     certain string value in an array of strings, along the lines of
     of_property_match_string(), but working for all of the supported
     firmware node types, and support for the "dma-names" device
     property based on it (Mika Westerberg).

   - ACPI core fix to parse the MADT (Multiple APIC Description Table)
     entries in the order expected by platform firmware (and mandated by
     the specification) to avoid confusion on systems with more than 255
     logical CPUs (Lukasz Anaczkowski).

   - Consolidation of the ACPI-based handling of PCI host bridges on x86
     and ia64 (Jiang Liu).

   - ACPI core fixes to ensure that the correct IRQ number is used to
     represent the SCI (System Control Interrupt) in the cases when it
     has been re-mapped (Chen Yu).

   - New ACPI backlight quirk for Lenovo IdeaPad S405 (Hans de Goede).

   - ACPI EC driver fixes (Lv Zheng).

   - Assorted ACPI fixes and cleanups (Dan Carpenter, Insu Yun, Jiri
     Kosina, Rami Rosen, Rasmus Villemoes).

   - New mechanism in the PM core allowing drivers to check if the
     platform firmware is going to be involved in the upcoming system
     suspend or if it has been involved in the suspend the system is
     resuming from at the moment (Rafael Wysocki).

     This should allow drivers to optimize their suspend/resume handling
     in some cases and the changes include a couple of users of it (the
     i8042 input driver, PCI PM).

   - PCI PM fix to prevent runtime-suspended devices with PME enabled
     from being resumed during system suspend even if they aren't
     configured to wake up the system from sleep (Rafael Wysocki).

   - New mechanism to report the number of a wakeup IRQ that woke up the
     system from sleep last time (Alexandra Yates).

   - Removal of unused interfaces from the generic power domains
     framework and fixes related to latency measurements in that code
     (Ulf Hansson, Daniel Lezcano).

   - cpufreq core sysfs interface rework to make it handle CPUs that
     share performance scaling settings (represented by a common cpufreq
     policy object) more symmetrically (Viresh Kumar).

     This should help to simplify the CPU offline/online handling among
     other things.

   - cpufreq core fixes and cleanups (Viresh Kumar).

   - intel_pstate fixes related to the Turbo Activation Ratio (TAR)
     mechanism on client platforms which causes the turbo P-states range
     to vary depending on platform firmware settings (Srinivas
     Pandruvada).

   - intel_pstate sysfs interface fix (Prarit Bhargava).

   - Assorted cpufreq driver (imx, tegra20, powernv, integrator) fixes
     and cleanups (Bai Ping, Bartlomiej Zolnierkiewicz, Shilpasri G
     Bhat, Luis de Bethencourt).

   - cpuidle mvebu driver cleanups (Russell King).

   - OPP (Operating Performance Points) framework code reorganization to
     make it more maintainable (Viresh Kumar).

   - Intel Broxton support for the RAPL (Running Average Power Limits)
     power capping driver (Amy Wiles).

   - Assorted power management code fixes and cleanups (Dan Carpenter,
     Geert Uytterhoeven, Geliang Tang, Luis de Bethencourt, Rasmus
     Villemoes)"

* tag 'pm+acpi-4.4-rc1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (108 commits)
  cpufreq: postfix policy directory with the first CPU in related_cpus
  cpufreq: create cpu/cpufreq/policyX directories
  cpufreq: remove cpufreq_sysfs_{create|remove}_file()
  cpufreq: create cpu/cpufreq at boot time
  cpufreq: Use cpumask_copy instead of cpumask_or to copy a mask
  cpufreq: ondemand: Drop unnecessary locks from update_sampling_rate()
  PM / Domains: Merge measurements for PM QoS device latencies
  PM / Domains: Don't measure ->start|stop() latency in system PM callbacks
  PM / clk: Fix broken build due to non-matching code and header #ifdefs
  ACPI / Documentation: add copy_dsdt to ACPI format options
  ACPI / sysfs: correctly check failing memory allocation
  ACPI / video: Add a quirk to force native backlight on Lenovo IdeaPad S405
  ACPI / CPPC: Fix potential memory leak
  ACPI / CPPC: signedness bug in register_pcc_channel()
  ACPI / PAD: power_saving_thread() is not freezable
  ACPI / PM: Fix incorrect wakeup IRQ setting during suspend-to-idle
  ACPI: Using correct irq when waiting for events
  ACPI: Use correct IRQ when uninstalling ACPI interrupt handler
  cpuidle: mvebu: disable the bind/unbind attributes and use builtin_platform_driver
  cpuidle: mvebu: clean up multiple platform drivers
  ...

1 files changed, 1108 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/dbdisply.c b/drivers/acpi/acpica/dbdisply.c
new file mode 100644
index 000000000000..672977ec7c7d
--- /dev/null
+++ b/drivers/acpi/acpica/dbdisply.c
@@ -0,0 +1,1108 @@
+/*******************************************************************************
+ *
+ * Module Name: dbdisply - debug display commands
+ *
+ ******************************************************************************/
+
+/*
+ * 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 "amlcode.h"
+#include "acdispat.h"
+#include "acnamesp.h"
+#include "acparser.h"
+#include "acinterp.h"
+#include "acdebug.h"
+
+#define _COMPONENT          ACPI_CA_DEBUGGER
+ACPI_MODULE_NAME("dbdisply")
+
+/* Local prototypes */
+static void acpi_db_dump_parser_descriptor(union acpi_parse_object *op);
+
+static void *acpi_db_get_pointer(void *target);
+
+static acpi_status
+acpi_db_display_non_root_handlers(acpi_handle obj_handle,
+				  u32 nesting_level,
+				  void *context, void **return_value);
+
+/*
+ * System handler information.
+ * Used for Handlers command, in acpi_db_display_handlers.
+ */
+#define ACPI_PREDEFINED_PREFIX          "%25s (%.2X) : "
+#define ACPI_HANDLER_NAME_STRING               "%30s : "
+#define ACPI_HANDLER_PRESENT_STRING                    "%-9s (%p)\n"
+#define ACPI_HANDLER_PRESENT_STRING2                   "%-9s (%p)"
+#define ACPI_HANDLER_NOT_PRESENT_STRING                "%-9s\n"
+
+/* All predefined Address Space IDs */
+
+static acpi_adr_space_type acpi_gbl_space_id_list[] = {
+	ACPI_ADR_SPACE_SYSTEM_MEMORY,
+	ACPI_ADR_SPACE_SYSTEM_IO,
+	ACPI_ADR_SPACE_PCI_CONFIG,
+	ACPI_ADR_SPACE_EC,
+	ACPI_ADR_SPACE_SMBUS,
+	ACPI_ADR_SPACE_CMOS,
+	ACPI_ADR_SPACE_PCI_BAR_TARGET,
+	ACPI_ADR_SPACE_IPMI,
+	ACPI_ADR_SPACE_GPIO,
+	ACPI_ADR_SPACE_GSBUS,
+	ACPI_ADR_SPACE_DATA_TABLE,
+	ACPI_ADR_SPACE_FIXED_HARDWARE
+};
+
+/* Global handler information */
+
+typedef struct acpi_handler_info {
+	void *handler;
+	char *name;
+
+} acpi_handler_info;
+
+static struct acpi_handler_info acpi_gbl_handler_list[] = {
+	{&acpi_gbl_global_notify[0].handler, "System Notifications"},
+	{&acpi_gbl_global_notify[1].handler, "Device Notifications"},
+	{&acpi_gbl_table_handler, "ACPI Table Events"},
+	{&acpi_gbl_exception_handler, "Control Method Exceptions"},
+	{&acpi_gbl_interface_handler, "OSI Invocations"}
+};
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_get_pointer
+ *
+ * PARAMETERS:  target          - Pointer to string to be converted
+ *
+ * RETURN:      Converted pointer
+ *
+ * DESCRIPTION: Convert an ascii pointer value to a real value
+ *
+ ******************************************************************************/
+
+static void *acpi_db_get_pointer(void *target)
+{
+	void *obj_ptr;
+	acpi_size address;
+
+	address = strtoul(target, NULL, 16);
+	obj_ptr = ACPI_TO_POINTER(address);
+	return (obj_ptr);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_dump_parser_descriptor
+ *
+ * PARAMETERS:  op              - A parser Op descriptor
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display a formatted parser object
+ *
+ ******************************************************************************/
+
+static void acpi_db_dump_parser_descriptor(union acpi_parse_object *op)
+{
+	const struct acpi_opcode_info *info;
+
+	info = acpi_ps_get_opcode_info(op->common.aml_opcode);
+
+	acpi_os_printf("Parser Op Descriptor:\n");
+	acpi_os_printf("%20.20s : %4.4X\n", "Opcode", op->common.aml_opcode);
+
+	ACPI_DEBUG_ONLY_MEMBERS(acpi_os_printf("%20.20s : %s\n", "Opcode Name",
+					       info->name));
+
+	acpi_os_printf("%20.20s : %p\n", "Value/ArgList", op->common.value.arg);
+	acpi_os_printf("%20.20s : %p\n", "Parent", op->common.parent);
+	acpi_os_printf("%20.20s : %p\n", "NextOp", op->common.next);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_decode_and_display_object
+ *
+ * PARAMETERS:  target          - String with object to be displayed. Names
+ *                                and hex pointers are supported.
+ *              output_type     - Byte, Word, Dword, or Qword (B|W|D|Q)
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display a formatted ACPI object
+ *
+ ******************************************************************************/
+
+void acpi_db_decode_and_display_object(char *target, char *output_type)
+{
+	void *obj_ptr;
+	struct acpi_namespace_node *node;
+	union acpi_operand_object *obj_desc;
+	u32 display = DB_BYTE_DISPLAY;
+	char buffer[80];
+	struct acpi_buffer ret_buf;
+	acpi_status status;
+	u32 size;
+
+	if (!target) {
+		return;
+	}
+
+	/* Decode the output type */
+
+	if (output_type) {
+		acpi_ut_strupr(output_type);
+		if (output_type[0] == 'W') {
+			display = DB_WORD_DISPLAY;
+		} else if (output_type[0] == 'D') {
+			display = DB_DWORD_DISPLAY;
+		} else if (output_type[0] == 'Q') {
+			display = DB_QWORD_DISPLAY;
+		}
+	}
+
+	ret_buf.length = sizeof(buffer);
+	ret_buf.pointer = buffer;
+
+	/* Differentiate between a number and a name */
+
+	if ((target[0] >= 0x30) && (target[0] <= 0x39)) {
+		obj_ptr = acpi_db_get_pointer(target);
+		if (!acpi_os_readable(obj_ptr, 16)) {
+			acpi_os_printf
+			    ("Address %p is invalid in this address space\n",
+			     obj_ptr);
+			return;
+		}
+
+		/* Decode the object type */
+
+		switch (ACPI_GET_DESCRIPTOR_TYPE(obj_ptr)) {
+		case ACPI_DESC_TYPE_NAMED:
+
+			/* This is a namespace Node */
+
+			if (!acpi_os_readable
+			    (obj_ptr, sizeof(struct acpi_namespace_node))) {
+				acpi_os_printf
+				    ("Cannot read entire Named object at address %p\n",
+				     obj_ptr);
+				return;
+			}
+
+			node = obj_ptr;
+			goto dump_node;
+
+		case ACPI_DESC_TYPE_OPERAND:
+
+			/* This is a ACPI OPERAND OBJECT */
+
+			if (!acpi_os_readable
+			    (obj_ptr, sizeof(union acpi_operand_object))) {
+				acpi_os_printf
+				    ("Cannot read entire ACPI object at address %p\n",
+				     obj_ptr);
+				return;
+			}
+
+			acpi_ut_debug_dump_buffer(obj_ptr,
+						  sizeof(union
+							 acpi_operand_object),
+						  display, ACPI_UINT32_MAX);
+			acpi_ex_dump_object_descriptor(obj_ptr, 1);
+			break;
+
+		case ACPI_DESC_TYPE_PARSER:
+
+			/* This is a Parser Op object */
+
+			if (!acpi_os_readable
+			    (obj_ptr, sizeof(union acpi_parse_object))) {
+				acpi_os_printf
+				    ("Cannot read entire Parser object at address %p\n",
+				     obj_ptr);
+				return;
+			}
+
+			acpi_ut_debug_dump_buffer(obj_ptr,
+						  sizeof(union
+							 acpi_parse_object),
+						  display, ACPI_UINT32_MAX);
+			acpi_db_dump_parser_descriptor((union acpi_parse_object
+							*)obj_ptr);
+			break;
+
+		default:
+
+			/* Is not a recognizeable object */
+
+			acpi_os_printf
+			    ("Not a known ACPI internal object, descriptor type %2.2X\n",
+			     ACPI_GET_DESCRIPTOR_TYPE(obj_ptr));
+
+			size = 16;
+			if (acpi_os_readable(obj_ptr, 64)) {
+				size = 64;
+			}
+
+			/* Just dump some memory */
+
+			acpi_ut_debug_dump_buffer(obj_ptr, size, display,
+						  ACPI_UINT32_MAX);
+			break;
+		}
+
+		return;
+	}
+
+	/* The parameter is a name string that must be resolved to a Named obj */
+
+	node = acpi_db_local_ns_lookup(target);
+	if (!node) {
+		return;
+	}
+
+dump_node:
+	/* Now dump the NS node */
+
+	status = acpi_get_name(node, ACPI_FULL_PATHNAME_NO_TRAILING, &ret_buf);
+	if (ACPI_FAILURE(status)) {
+		acpi_os_printf("Could not convert name to pathname\n");
+	}
+
+	else {
+		acpi_os_printf("Object (%p) Pathname: %s\n",
+			       node, (char *)ret_buf.pointer);
+	}
+
+	if (!acpi_os_readable(node, sizeof(struct acpi_namespace_node))) {
+		acpi_os_printf("Invalid Named object at address %p\n", node);
+		return;
+	}
+
+	acpi_ut_debug_dump_buffer((void *)node,
+				  sizeof(struct acpi_namespace_node), display,
+				  ACPI_UINT32_MAX);
+	acpi_ex_dump_namespace_node(node, 1);
+
+	obj_desc = acpi_ns_get_attached_object(node);
+	if (obj_desc) {
+		acpi_os_printf("\nAttached Object (%p):\n", obj_desc);
+		if (!acpi_os_readable
+		    (obj_desc, sizeof(union acpi_operand_object))) {
+			acpi_os_printf
+			    ("Invalid internal ACPI Object at address %p\n",
+			     obj_desc);
+			return;
+		}
+
+		acpi_ut_debug_dump_buffer((void *)obj_desc,
+					  sizeof(union acpi_operand_object),
+					  display, ACPI_UINT32_MAX);
+		acpi_ex_dump_object_descriptor(obj_desc, 1);
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_display_method_info
+ *
+ * PARAMETERS:  start_op        - Root of the control method parse tree
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display information about the current method
+ *
+ ******************************************************************************/
+
+void acpi_db_display_method_info(union acpi_parse_object *start_op)
+{
+	struct acpi_walk_state *walk_state;
+	union acpi_operand_object *obj_desc;
+	struct acpi_namespace_node *node;
+	union acpi_parse_object *root_op;
+	union acpi_parse_object *op;
+	const struct acpi_opcode_info *op_info;
+	u32 num_ops = 0;
+	u32 num_operands = 0;
+	u32 num_operators = 0;
+	u32 num_remaining_ops = 0;
+	u32 num_remaining_operands = 0;
+	u32 num_remaining_operators = 0;
+	u8 count_remaining = FALSE;
+
+	walk_state = acpi_ds_get_current_walk_state(acpi_gbl_current_walk_list);
+	if (!walk_state) {
+		acpi_os_printf("There is no method currently executing\n");
+		return;
+	}
+
+	obj_desc = walk_state->method_desc;
+	node = walk_state->method_node;
+
+	acpi_os_printf("Currently executing control method is [%4.4s]\n",
+		       acpi_ut_get_node_name(node));
+	acpi_os_printf("%X Arguments, SyncLevel = %X\n",
+		       (u32)obj_desc->method.param_count,
+		       (u32)obj_desc->method.sync_level);
+
+	root_op = start_op;
+	while (root_op->common.parent) {
+		root_op = root_op->common.parent;
+	}
+
+	op = root_op;
+
+	while (op) {
+		if (op == start_op) {
+			count_remaining = TRUE;
+		}
+
+		num_ops++;
+		if (count_remaining) {
+			num_remaining_ops++;
+		}
+
+		/* Decode the opcode */
+
+		op_info = acpi_ps_get_opcode_info(op->common.aml_opcode);
+		switch (op_info->class) {
+		case AML_CLASS_ARGUMENT:
+
+			if (count_remaining) {
+				num_remaining_operands++;
+			}
+
+			num_operands++;
+			break;
+
+		case AML_CLASS_UNKNOWN:
+
+			/* Bad opcode or ASCII character */
+
+			continue;
+
+		default:
+
+			if (count_remaining) {
+				num_remaining_operators++;
+			}
+
+			num_operators++;
+			break;
+		}
+
+		op = acpi_ps_get_depth_next(start_op, op);
+	}
+
+	acpi_os_printf
+	    ("Method contains:       %X AML Opcodes - %X Operators, %X Operands\n",
+	     num_ops, num_operators, num_operands);
+
+	acpi_os_printf
+	    ("Remaining to execute:  %X AML Opcodes - %X Operators, %X Operands\n",
+	     num_remaining_ops, num_remaining_operators,
+	     num_remaining_operands);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_display_locals
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display all locals for the currently running control method
+ *
+ ******************************************************************************/
+
+void acpi_db_display_locals(void)
+{
+	struct acpi_walk_state *walk_state;
+
+	walk_state = acpi_ds_get_current_walk_state(acpi_gbl_current_walk_list);
+	if (!walk_state) {
+		acpi_os_printf("There is no method currently executing\n");
+		return;
+	}
+
+	acpi_db_decode_locals(walk_state);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_display_arguments
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display all arguments for the currently running control method
+ *
+ ******************************************************************************/
+
+void acpi_db_display_arguments(void)
+{
+	struct acpi_walk_state *walk_state;
+
+	walk_state = acpi_ds_get_current_walk_state(acpi_gbl_current_walk_list);
+	if (!walk_state) {
+		acpi_os_printf("There is no method currently executing\n");
+		return;
+	}
+
+	acpi_db_decode_arguments(walk_state);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_display_results
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display current contents of a method result stack
+ *
+ ******************************************************************************/
+
+void acpi_db_display_results(void)
+{
+	u32 i;
+	struct acpi_walk_state *walk_state;
+	union acpi_operand_object *obj_desc;
+	u32 result_count = 0;
+	struct acpi_namespace_node *node;
+	union acpi_generic_state *frame;
+	u32 index;		/* Index onto current frame */
+
+	walk_state = acpi_ds_get_current_walk_state(acpi_gbl_current_walk_list);
+	if (!walk_state) {
+		acpi_os_printf("There is no method currently executing\n");
+		return;
+	}
+
+	obj_desc = walk_state->method_desc;
+	node = walk_state->method_node;
+
+	if (walk_state->results) {
+		result_count = walk_state->result_count;
+	}
+
+	acpi_os_printf("Method [%4.4s] has %X stacked result objects\n",
+		       acpi_ut_get_node_name(node), result_count);
+
+	/* From the top element of result stack */
+
+	frame = walk_state->results;
+	index = (result_count - 1) % ACPI_RESULTS_FRAME_OBJ_NUM;
+
+	for (i = 0; i < result_count; i++) {
+		obj_desc = frame->results.obj_desc[index];
+		acpi_os_printf("Result%u: ", i);
+		acpi_db_display_internal_object(obj_desc, walk_state);
+
+		if (index == 0) {
+			frame = frame->results.next;
+			index = ACPI_RESULTS_FRAME_OBJ_NUM;
+		}
+
+		index--;
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_display_calling_tree
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display current calling tree of nested control methods
+ *
+ ******************************************************************************/
+
+void acpi_db_display_calling_tree(void)
+{
+	struct acpi_walk_state *walk_state;
+	struct acpi_namespace_node *node;
+
+	walk_state = acpi_ds_get_current_walk_state(acpi_gbl_current_walk_list);
+	if (!walk_state) {
+		acpi_os_printf("There is no method currently executing\n");
+		return;
+	}
+
+	node = walk_state->method_node;
+	acpi_os_printf("Current Control Method Call Tree\n");
+
+	while (walk_state) {
+		node = walk_state->method_node;
+		acpi_os_printf("  [%4.4s]\n", acpi_ut_get_node_name(node));
+
+		walk_state = walk_state->next;
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_display_object_type
+ *
+ * PARAMETERS:  name            - User entered NS node handle or name
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display type of an arbitrary NS node
+ *
+ ******************************************************************************/
+
+void acpi_db_display_object_type(char *name)
+{
+	struct acpi_namespace_node *node;
+	struct acpi_device_info *info;
+	acpi_status status;
+	u32 i;
+
+	node = acpi_db_convert_to_node(name);
+	if (!node) {
+		return;
+	}
+
+	status = acpi_get_object_info(ACPI_CAST_PTR(acpi_handle, node), &info);
+	if (ACPI_FAILURE(status)) {
+		acpi_os_printf("Could not get object info, %s\n",
+			       acpi_format_exception(status));
+		return;
+	}
+
+	if (info->valid & ACPI_VALID_ADR) {
+		acpi_os_printf("ADR: %8.8X%8.8X, STA: %8.8X, Flags: %X\n",
+			       ACPI_FORMAT_UINT64(info->address),
+			       info->current_status, info->flags);
+	}
+	if (info->valid & ACPI_VALID_SXDS) {
+		acpi_os_printf("S1D-%2.2X S2D-%2.2X S3D-%2.2X S4D-%2.2X\n",
+			       info->highest_dstates[0],
+			       info->highest_dstates[1],
+			       info->highest_dstates[2],
+			       info->highest_dstates[3]);
+	}
+	if (info->valid & ACPI_VALID_SXWS) {
+		acpi_os_printf
+		    ("S0W-%2.2X S1W-%2.2X S2W-%2.2X S3W-%2.2X S4W-%2.2X\n",
+		     info->lowest_dstates[0], info->lowest_dstates[1],
+		     info->lowest_dstates[2], info->lowest_dstates[3],
+		     info->lowest_dstates[4]);
+	}
+
+	if (info->valid & ACPI_VALID_HID) {
+		acpi_os_printf("HID: %s\n", info->hardware_id.string);
+	}
+
+	if (info->valid & ACPI_VALID_UID) {
+		acpi_os_printf("UID: %s\n", info->unique_id.string);
+	}
+
+	if (info->valid & ACPI_VALID_SUB) {
+		acpi_os_printf("SUB: %s\n", info->subsystem_id.string);
+	}
+
+	if (info->valid & ACPI_VALID_CID) {
+		for (i = 0; i < info->compatible_id_list.count; i++) {
+			acpi_os_printf("CID %u: %s\n", i,
+				       info->compatible_id_list.ids[i].string);
+		}
+	}
+
+	ACPI_FREE(info);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_display_result_object
+ *
+ * PARAMETERS:  obj_desc        - Object to be displayed
+ *              walk_state      - Current walk state
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display the result of an AML opcode
+ *
+ * Note: Curently only displays the result object if we are single stepping.
+ * However, this output may be useful in other contexts and could be enabled
+ * to do so if needed.
+ *
+ ******************************************************************************/
+
+void
+acpi_db_display_result_object(union acpi_operand_object *obj_desc,
+			      struct acpi_walk_state *walk_state)
+{
+
+	/* Only display if single stepping */
+
+	if (!acpi_gbl_cm_single_step) {
+		return;
+	}
+
+	acpi_os_printf("ResultObj: ");
+	acpi_db_display_internal_object(obj_desc, walk_state);
+	acpi_os_printf("\n");
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_display_argument_object
+ *
+ * PARAMETERS:  obj_desc        - Object to be displayed
+ *              walk_state      - Current walk state
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display the result of an AML opcode
+ *
+ ******************************************************************************/
+
+void
+acpi_db_display_argument_object(union acpi_operand_object *obj_desc,
+				struct acpi_walk_state *walk_state)
+{
+
+	if (!acpi_gbl_cm_single_step) {
+		return;
+	}
+
+	acpi_os_printf("ArgObj:  ");
+	acpi_db_display_internal_object(obj_desc, walk_state);
+}
+
+#if (!ACPI_REDUCED_HARDWARE)
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_display_gpes
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display the current GPE structures
+ *
+ ******************************************************************************/
+
+void acpi_db_display_gpes(void)
+{
+	struct acpi_gpe_block_info *gpe_block;
+	struct acpi_gpe_xrupt_info *gpe_xrupt_info;
+	struct acpi_gpe_event_info *gpe_event_info;
+	struct acpi_gpe_register_info *gpe_register_info;
+	char *gpe_type;
+	struct acpi_gpe_notify_info *notify;
+	u32 gpe_index;
+	u32 block = 0;
+	u32 i;
+	u32 j;
+	u32 count;
+	char buffer[80];
+	struct acpi_buffer ret_buf;
+	acpi_status status;
+
+	ret_buf.length = sizeof(buffer);
+	ret_buf.pointer = buffer;
+
+	block = 0;
+
+	/* Walk the GPE lists */
+
+	gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
+	while (gpe_xrupt_info) {
+		gpe_block = gpe_xrupt_info->gpe_block_list_head;
+		while (gpe_block) {
+			status = acpi_get_name(gpe_block->node,
+					       ACPI_FULL_PATHNAME_NO_TRAILING,
+					       &ret_buf);
+			if (ACPI_FAILURE(status)) {
+				acpi_os_printf
+				    ("Could not convert name to pathname\n");
+			}
+
+			if (gpe_block->node == acpi_gbl_fadt_gpe_device) {
+				gpe_type = "FADT-defined GPE block";
+			} else {
+				gpe_type = "GPE Block Device";
+			}
+
+			acpi_os_printf
+			    ("\nBlock %u - Info %p  DeviceNode %p [%s] - %s\n",
+			     block, gpe_block, gpe_block->node, buffer,
+			     gpe_type);
+
+			acpi_os_printf("    Registers:    %u (%u GPEs)\n",
+				       gpe_block->register_count,
+				       gpe_block->gpe_count);
+
+			acpi_os_printf
+			    ("    GPE range:    0x%X to 0x%X on interrupt %u\n",
+			     gpe_block->block_base_number,
+			     gpe_block->block_base_number +
+			     (gpe_block->gpe_count - 1),
+			     gpe_xrupt_info->interrupt_number);
+
+			acpi_os_printf
+			    ("    RegisterInfo: %p  Status %8.8X%8.8X Enable %8.8X%8.8X\n",
+			     gpe_block->register_info,
+			     ACPI_FORMAT_UINT64(gpe_block->register_info->
+						status_address.address),
+			     ACPI_FORMAT_UINT64(gpe_block->register_info->
+						enable_address.address));
+
+			acpi_os_printf("  EventInfo:    %p\n",
+				       gpe_block->event_info);
+
+			/* Examine each GPE Register within the block */
+
+			for (i = 0; i < gpe_block->register_count; i++) {
+				gpe_register_info =
+				    &gpe_block->register_info[i];
+
+				acpi_os_printf("    Reg %u: (GPE %.2X-%.2X)  "
+					       "RunEnable %2.2X WakeEnable %2.2X"
+					       " Status %8.8X%8.8X Enable %8.8X%8.8X\n",
+					       i,
+					       gpe_register_info->
+					       base_gpe_number,
+					       gpe_register_info->
+					       base_gpe_number +
+					       (ACPI_GPE_REGISTER_WIDTH - 1),
+					       gpe_register_info->
+					       enable_for_run,
+					       gpe_register_info->
+					       enable_for_wake,
+					       ACPI_FORMAT_UINT64
+					       (gpe_register_info->
+						status_address.address),
+					       ACPI_FORMAT_UINT64
+					       (gpe_register_info->
+						enable_address.address));
+
+				/* Now look at the individual GPEs in this byte register */
+
+				for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
+					gpe_index =
+					    (i * ACPI_GPE_REGISTER_WIDTH) + j;
+					gpe_event_info =
+					    &gpe_block->event_info[gpe_index];
+
+					if (ACPI_GPE_DISPATCH_TYPE
+					    (gpe_event_info->flags) ==
+					    ACPI_GPE_DISPATCH_NONE) {
+
+						/* This GPE is not used (no method or handler), ignore it */
+
+						continue;
+					}
+
+					acpi_os_printf
+					    ("        GPE %.2X: %p  RunRefs %2.2X Flags %2.2X (",
+					     gpe_block->block_base_number +
+					     gpe_index, gpe_event_info,
+					     gpe_event_info->runtime_count,
+					     gpe_event_info->flags);
+
+					/* Decode the flags byte */
+
+					if (gpe_event_info->
+					    flags & ACPI_GPE_LEVEL_TRIGGERED) {
+						acpi_os_printf("Level, ");
+					} else {
+						acpi_os_printf("Edge, ");
+					}
+
+					if (gpe_event_info->
+					    flags & ACPI_GPE_CAN_WAKE) {
+						acpi_os_printf("CanWake, ");
+					} else {
+						acpi_os_printf("RunOnly, ");
+					}
+
+					switch (ACPI_GPE_DISPATCH_TYPE
+						(gpe_event_info->flags)) {
+					case ACPI_GPE_DISPATCH_NONE:
+
+						acpi_os_printf("NotUsed");
+						break;
+
+					case ACPI_GPE_DISPATCH_METHOD:
+
+						acpi_os_printf("Method");
+						break;
+
+					case ACPI_GPE_DISPATCH_HANDLER:
+
+						acpi_os_printf("Handler");
+						break;
+
+					case ACPI_GPE_DISPATCH_NOTIFY:
+
+						count = 0;
+						notify =
+						    gpe_event_info->dispatch.
+						    notify_list;
+						while (notify) {
+							count++;
+							notify = notify->next;
+						}
+
+						acpi_os_printf
+						    ("Implicit Notify on %u devices",
+						     count);
+						break;
+
+					case ACPI_GPE_DISPATCH_RAW_HANDLER:
+
+						acpi_os_printf("RawHandler");
+						break;
+
+					default:
+
+						acpi_os_printf("UNKNOWN: %X",
+							       ACPI_GPE_DISPATCH_TYPE
+							       (gpe_event_info->
+								flags));
+						break;
+					}
+
+					acpi_os_printf(")\n");
+				}
+			}
+
+			block++;
+			gpe_block = gpe_block->next;
+		}
+
+		gpe_xrupt_info = gpe_xrupt_info->next;
+	}
+}
+#endif				/* !ACPI_REDUCED_HARDWARE */
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_display_handlers
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Display the currently installed global handlers
+ *
+ ******************************************************************************/
+
+void acpi_db_display_handlers(void)
+{
+	union acpi_operand_object *obj_desc;
+	union acpi_operand_object *handler_obj;
+	acpi_adr_space_type space_id;
+	u32 i;
+
+	/* Operation region handlers */
+
+	acpi_os_printf("\nOperation Region Handlers at the namespace root:\n");
+
+	obj_desc = acpi_ns_get_attached_object(acpi_gbl_root_node);
+	if (obj_desc) {
+		for (i = 0; i < ACPI_ARRAY_LENGTH(acpi_gbl_space_id_list); i++) {
+			space_id = acpi_gbl_space_id_list[i];
+			handler_obj = obj_desc->device.handler;
+
+			acpi_os_printf(ACPI_PREDEFINED_PREFIX,
+				       acpi_ut_get_region_name((u8)space_id),
+				       space_id);
+
+			while (handler_obj) {
+				if (acpi_gbl_space_id_list[i] ==
+				    handler_obj->address_space.space_id) {
+					acpi_os_printf
+					    (ACPI_HANDLER_PRESENT_STRING,
+					     (handler_obj->address_space.
+					      handler_flags &
+					      ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)
+					     ? "Default" : "User",
+					     handler_obj->address_space.
+					     handler);
+
+					goto found_handler;
+				}
+
+				handler_obj = handler_obj->address_space.next;
+			}
+
+			/* There is no handler for this space_id */
+
+			acpi_os_printf("None\n");
+
+found_handler:		;
+		}
+
+		/* Find all handlers for user-defined space_IDs */
+
+		handler_obj = obj_desc->device.handler;
+		while (handler_obj) {
+			if (handler_obj->address_space.space_id >=
+			    ACPI_USER_REGION_BEGIN) {
+				acpi_os_printf(ACPI_PREDEFINED_PREFIX,
+					       "User-defined ID",
+					       handler_obj->address_space.
+					       space_id);
+				acpi_os_printf(ACPI_HANDLER_PRESENT_STRING,
+					       (handler_obj->address_space.
+						handler_flags &
+						ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)
+					       ? "Default" : "User",
+					       handler_obj->address_space.
+					       handler);
+			}
+
+			handler_obj = handler_obj->address_space.next;
+		}
+	}
+#if (!ACPI_REDUCED_HARDWARE)
+
+	/* Fixed event handlers */
+
+	acpi_os_printf("\nFixed Event Handlers:\n");
+
+	for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
+		acpi_os_printf(ACPI_PREDEFINED_PREFIX,
+			       acpi_ut_get_event_name(i), i);
+		if (acpi_gbl_fixed_event_handlers[i].handler) {
+			acpi_os_printf(ACPI_HANDLER_PRESENT_STRING, "User",
+				       acpi_gbl_fixed_event_handlers[i].
+				       handler);
+		} else {
+			acpi_os_printf(ACPI_HANDLER_NOT_PRESENT_STRING, "None");
+		}
+	}
+
+#endif				/* !ACPI_REDUCED_HARDWARE */
+
+	/* Miscellaneous global handlers */
+
+	acpi_os_printf("\nMiscellaneous Global Handlers:\n");
+
+	for (i = 0; i < ACPI_ARRAY_LENGTH(acpi_gbl_handler_list); i++) {
+		acpi_os_printf(ACPI_HANDLER_NAME_STRING,
+			       acpi_gbl_handler_list[i].name);
+
+		if (acpi_gbl_handler_list[i].handler) {
+			acpi_os_printf(ACPI_HANDLER_PRESENT_STRING, "User",
+				       acpi_gbl_handler_list[i].handler);
+		} else {
+			acpi_os_printf(ACPI_HANDLER_NOT_PRESENT_STRING, "None");
+		}
+	}
+
+	/* Other handlers that are installed throughout the namespace */
+
+	acpi_os_printf("\nOperation Region Handlers for specific devices:\n");
+
+	(void)acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+				  ACPI_UINT32_MAX,
+				  acpi_db_display_non_root_handlers, NULL, NULL,
+				  NULL);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_db_display_non_root_handlers
+ *
+ * PARAMETERS:  acpi_walk_callback
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Display information about all handlers installed for a
+ *              device object.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_db_display_non_root_handlers(acpi_handle obj_handle,
+				  u32 nesting_level,
+				  void *context, void **return_value)
+{
+	struct acpi_namespace_node *node =
+	    ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
+	union acpi_operand_object *obj_desc;
+	union acpi_operand_object *handler_obj;
+	char *pathname;
+
+	obj_desc = acpi_ns_get_attached_object(node);
+	if (!obj_desc) {
+		return (AE_OK);
+	}
+
+	pathname = acpi_ns_get_external_pathname(node);
+	if (!pathname) {
+		return (AE_OK);
+	}
+
+	/* Display all handlers associated with this device */
+
+	handler_obj = obj_desc->device.handler;
+	while (handler_obj) {
+		acpi_os_printf(ACPI_PREDEFINED_PREFIX,
+			       acpi_ut_get_region_name((u8)handler_obj->
+						       address_space.space_id),
+			       handler_obj->address_space.space_id);
+
+		acpi_os_printf(ACPI_HANDLER_PRESENT_STRING2,
+			       (handler_obj->address_space.handler_flags &
+				ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) ? "Default"
+			       : "User", handler_obj->address_space.handler);
+
+		acpi_os_printf(" Device Name: %s (%p)\n", pathname, node);
+
+		handler_obj = handler_obj->address_space.next;
+	}
+
+	ACPI_FREE(pathname);
+	return (AE_OK);
+}