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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 18:10:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 18:10:13 -0800
commit0d51ce9ca1116e8f4dc87cb51db8dd250327e9bb (patch)
treef845ff44f40f102c5143f94d3c9734e65544712d /drivers/acpi/acpica/dbtest.c
parent41ecf1404b34d9975eb97f5005d9e4274eaeb76a (diff)
parent1ab68460b1d0671968b35e04f21efcf1ce051916 (diff)
downloadtalos-op-linux-0d51ce9ca1116e8f4dc87cb51db8dd250327e9bb.tar.gz
talos-op-linux-0d51ce9ca1116e8f4dc87cb51db8dd250327e9bb.zip
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 ...
Diffstat (limited to 'drivers/acpi/acpica/dbtest.c')
-rw-r--r--drivers/acpi/acpica/dbtest.c1057
1 files changed, 1057 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/dbtest.c b/drivers/acpi/acpica/dbtest.c
new file mode 100644
index 000000000000..10ea8bf9b810
--- /dev/null
+++ b/drivers/acpi/acpica/dbtest.c
@@ -0,0 +1,1057 @@
+/*******************************************************************************
+ *
+ * Module Name: dbtest - Various debug-related tests
+ *
+ ******************************************************************************/
+
+/*
+ * 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 "acdebug.h"
+#include "acnamesp.h"
+#include "acpredef.h"
+
+#define _COMPONENT ACPI_CA_DEBUGGER
+ACPI_MODULE_NAME("dbtest")
+
+/* Local prototypes */
+static void acpi_db_test_all_objects(void);
+
+static acpi_status
+acpi_db_test_one_object(acpi_handle obj_handle,
+ u32 nesting_level, void *context, void **return_value);
+
+static acpi_status
+acpi_db_test_integer_type(struct acpi_namespace_node *node, u32 bit_length);
+
+static acpi_status
+acpi_db_test_buffer_type(struct acpi_namespace_node *node, u32 bit_length);
+
+static acpi_status
+acpi_db_test_string_type(struct acpi_namespace_node *node, u32 byte_length);
+
+static acpi_status
+acpi_db_read_from_object(struct acpi_namespace_node *node,
+ acpi_object_type expected_type,
+ union acpi_object **value);
+
+static acpi_status
+acpi_db_write_to_object(struct acpi_namespace_node *node,
+ union acpi_object *value);
+
+static void acpi_db_evaluate_all_predefined_names(char *count_arg);
+
+static acpi_status
+acpi_db_evaluate_one_predefined_name(acpi_handle obj_handle,
+ u32 nesting_level,
+ void *context, void **return_value);
+
+/*
+ * Test subcommands
+ */
+static struct acpi_db_argument_info acpi_db_test_types[] = {
+ {"OBJECTS"},
+ {"PREDEFINED"},
+ {NULL} /* Must be null terminated */
+};
+
+#define CMD_TEST_OBJECTS 0
+#define CMD_TEST_PREDEFINED 1
+
+#define BUFFER_FILL_VALUE 0xFF
+
+/*
+ * Support for the special debugger read/write control methods.
+ * These methods are installed into the current namespace and are
+ * used to read and write the various namespace objects. The point
+ * is to force the AML interpreter do all of the work.
+ */
+#define ACPI_DB_READ_METHOD "\\_T98"
+#define ACPI_DB_WRITE_METHOD "\\_T99"
+
+static acpi_handle read_handle = NULL;
+static acpi_handle write_handle = NULL;
+
+/* ASL Definitions of the debugger read/write control methods */
+
+#if 0
+definition_block("ssdt.aml", "SSDT", 2, "Intel", "DEBUG", 0x00000001)
+{
+ method(_T98, 1, not_serialized) { /* Read */
+ return (de_ref_of(arg0))
+ }
+}
+
+definition_block("ssdt2.aml", "SSDT", 2, "Intel", "DEBUG", 0x00000001)
+{
+ method(_T99, 2, not_serialized) { /* Write */
+ store(arg1, arg0)
+ }
+}
+#endif
+
+static unsigned char read_method_code[] = {
+ 0x53, 0x53, 0x44, 0x54, 0x2E, 0x00, 0x00, 0x00, /* 00000000 "SSDT...." */
+ 0x02, 0xC9, 0x49, 0x6E, 0x74, 0x65, 0x6C, 0x00, /* 00000008 "..Intel." */
+ 0x44, 0x45, 0x42, 0x55, 0x47, 0x00, 0x00, 0x00, /* 00000010 "DEBUG..." */
+ 0x01, 0x00, 0x00, 0x00, 0x49, 0x4E, 0x54, 0x4C, /* 00000018 "....INTL" */
+ 0x18, 0x12, 0x13, 0x20, 0x14, 0x09, 0x5F, 0x54, /* 00000020 "... .._T" */
+ 0x39, 0x38, 0x01, 0xA4, 0x83, 0x68 /* 00000028 "98...h" */
+};
+
+static unsigned char write_method_code[] = {
+ 0x53, 0x53, 0x44, 0x54, 0x2E, 0x00, 0x00, 0x00, /* 00000000 "SSDT...." */
+ 0x02, 0x15, 0x49, 0x6E, 0x74, 0x65, 0x6C, 0x00, /* 00000008 "..Intel." */
+ 0x44, 0x45, 0x42, 0x55, 0x47, 0x00, 0x00, 0x00, /* 00000010 "DEBUG..." */
+ 0x01, 0x00, 0x00, 0x00, 0x49, 0x4E, 0x54, 0x4C, /* 00000018 "....INTL" */
+ 0x18, 0x12, 0x13, 0x20, 0x14, 0x09, 0x5F, 0x54, /* 00000020 "... .._T" */
+ 0x39, 0x39, 0x02, 0x70, 0x69, 0x68 /* 00000028 "99.pih" */
+};
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_db_execute_test
+ *
+ * PARAMETERS: type_arg - Subcommand
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Execute various debug tests.
+ *
+ * Note: Code is prepared for future expansion of the TEST command.
+ *
+ ******************************************************************************/
+
+void acpi_db_execute_test(char *type_arg)
+{
+ u32 temp;
+
+ acpi_ut_strupr(type_arg);
+ temp = acpi_db_match_argument(type_arg, acpi_db_test_types);
+ if (temp == ACPI_TYPE_NOT_FOUND) {
+ acpi_os_printf("Invalid or unsupported argument\n");
+ return;
+ }
+
+ switch (temp) {
+ case CMD_TEST_OBJECTS:
+
+ acpi_db_test_all_objects();
+ break;
+
+ case CMD_TEST_PREDEFINED:
+
+ acpi_db_evaluate_all_predefined_names(NULL);
+ break;
+
+ default:
+ break;
+ }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_db_test_all_objects
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: This test implements the OBJECTS subcommand. It exercises the
+ * namespace by reading/writing/comparing all data objects such
+ * as integers, strings, buffers, fields, buffer fields, etc.
+ *
+ ******************************************************************************/
+
+static void acpi_db_test_all_objects(void)
+{
+ acpi_status status;
+
+ /* Install the debugger read-object control method if necessary */
+
+ if (!read_handle) {
+ status = acpi_install_method(read_method_code);
+ if (ACPI_FAILURE(status)) {
+ acpi_os_printf
+ ("%s, Could not install debugger read method\n",
+ acpi_format_exception(status));
+ return;
+ }
+
+ status =
+ acpi_get_handle(NULL, ACPI_DB_READ_METHOD, &read_handle);
+ if (ACPI_FAILURE(status)) {
+ acpi_os_printf
+ ("Could not obtain handle for debug method %s\n",
+ ACPI_DB_READ_METHOD);
+ return;
+ }
+ }
+
+ /* Install the debugger write-object control method if necessary */
+
+ if (!write_handle) {
+ status = acpi_install_method(write_method_code);
+ if (ACPI_FAILURE(status)) {
+ acpi_os_printf
+ ("%s, Could not install debugger write method\n",
+ acpi_format_exception(status));
+ return;
+ }
+
+ status =
+ acpi_get_handle(NULL, ACPI_DB_WRITE_METHOD, &write_handle);
+ if (ACPI_FAILURE(status)) {
+ acpi_os_printf
+ ("Could not obtain handle for debug method %s\n",
+ ACPI_DB_WRITE_METHOD);
+ return;
+ }
+ }
+
+ /* Walk the entire namespace, testing each supported named data object */
+
+ (void)acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX, acpi_db_test_one_object,
+ NULL, NULL, NULL);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_db_test_one_object
+ *
+ * PARAMETERS: acpi_walk_callback
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Test one namespace object. Supported types are Integer,
+ * String, Buffer, buffer_field, and field_unit. All other object
+ * types are simply ignored.
+ *
+ * Note: Support for Packages is not implemented.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_db_test_one_object(acpi_handle obj_handle,
+ u32 nesting_level, void *context, void **return_value)
+{
+ struct acpi_namespace_node *node;
+ union acpi_operand_object *obj_desc;
+ union acpi_operand_object *region_obj;
+ acpi_object_type local_type;
+ u32 bit_length = 0;
+ u32 byte_length = 0;
+ acpi_status status = AE_OK;
+
+ node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
+ obj_desc = node->object;
+
+ /*
+ * For the supported types, get the actual bit length or
+ * byte length. Map the type to one of Integer/String/Buffer.
+ */
+ switch (node->type) {
+ case ACPI_TYPE_INTEGER:
+
+ /* Integer width is either 32 or 64 */
+
+ local_type = ACPI_TYPE_INTEGER;
+ bit_length = acpi_gbl_integer_bit_width;
+ break;
+
+ case ACPI_TYPE_STRING:
+
+ local_type = ACPI_TYPE_STRING;
+ byte_length = obj_desc->string.length;
+ break;
+
+ case ACPI_TYPE_BUFFER:
+
+ local_type = ACPI_TYPE_BUFFER;
+ byte_length = obj_desc->buffer.length;
+ bit_length = byte_length * 8;
+ break;
+
+ case ACPI_TYPE_FIELD_UNIT:
+ case ACPI_TYPE_BUFFER_FIELD:
+ case ACPI_TYPE_LOCAL_REGION_FIELD:
+ case ACPI_TYPE_LOCAL_INDEX_FIELD:
+ case ACPI_TYPE_LOCAL_BANK_FIELD:
+
+ local_type = ACPI_TYPE_INTEGER;
+ if (obj_desc) {
+ /*
+ * Returned object will be a Buffer if the field length
+ * is larger than the size of an Integer (32 or 64 bits
+ * depending on the DSDT version).
+ */
+ bit_length = obj_desc->common_field.bit_length;
+ byte_length = ACPI_ROUND_BITS_UP_TO_BYTES(bit_length);
+ if (bit_length > acpi_gbl_integer_bit_width) {
+ local_type = ACPI_TYPE_BUFFER;
+ }
+ }
+ break;
+
+ default:
+
+ /* Ignore all other types */
+
+ return (AE_OK);
+ }
+
+ /* Emit the common prefix: Type:Name */
+
+ acpi_os_printf("%14s: %4.4s",
+ acpi_ut_get_type_name(node->type), node->name.ascii);
+ if (!obj_desc) {
+ acpi_os_printf(" Ignoring, no attached object\n");
+ return (AE_OK);
+ }
+
+ /*
+ * Check for unsupported region types. Note: acpi_exec simulates
+ * access to system_memory, system_IO, PCI_Config, and EC.
+ */
+ switch (node->type) {
+ case ACPI_TYPE_LOCAL_REGION_FIELD:
+
+ region_obj = obj_desc->field.region_obj;
+ switch (region_obj->region.space_id) {
+ case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+ case ACPI_ADR_SPACE_SYSTEM_IO:
+ case ACPI_ADR_SPACE_PCI_CONFIG:
+ case ACPI_ADR_SPACE_EC:
+
+ break;
+
+ default:
+
+ acpi_os_printf
+ (" %s space is not supported [%4.4s]\n",
+ acpi_ut_get_region_name(region_obj->region.
+ space_id),
+ region_obj->region.node->name.ascii);
+ return (AE_OK);
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ /* At this point, we have resolved the object to one of the major types */
+
+ switch (local_type) {
+ case ACPI_TYPE_INTEGER:
+
+ status = acpi_db_test_integer_type(node, bit_length);
+ break;
+
+ case ACPI_TYPE_STRING:
+
+ status = acpi_db_test_string_type(node, byte_length);
+ break;
+
+ case ACPI_TYPE_BUFFER:
+
+ status = acpi_db_test_buffer_type(node, bit_length);
+ break;
+
+ default:
+
+ acpi_os_printf(" Ignoring, type not implemented (%2.2X)",
+ local_type);
+ break;
+ }
+
+ switch (node->type) {
+ case ACPI_TYPE_LOCAL_REGION_FIELD:
+
+ region_obj = obj_desc->field.region_obj;
+ acpi_os_printf(" (%s)",
+ acpi_ut_get_region_name(region_obj->region.
+ space_id));
+ break;
+
+ default:
+ break;
+ }
+
+ acpi_os_printf("\n");
+ return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_db_test_integer_type
+ *
+ * PARAMETERS: node - Parent NS node for the object
+ * bit_length - Actual length of the object. Used for
+ * support of arbitrary length field_unit
+ * and buffer_field objects.
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Test read/write for an Integer-valued object. Performs a
+ * write/read/compare of an arbitrary new value, then performs
+ * a write/read/compare of the original value.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_db_test_integer_type(struct acpi_namespace_node *node, u32 bit_length)
+{
+ union acpi_object *temp1 = NULL;
+ union acpi_object *temp2 = NULL;
+ union acpi_object *temp3 = NULL;
+ union acpi_object write_value;
+ u64 value_to_write;
+ acpi_status status;
+
+ if (bit_length > 64) {
+ acpi_os_printf(" Invalid length for an Integer: %u",
+ bit_length);
+ return (AE_OK);
+ }
+
+ /* Read the original value */
+
+ status = acpi_db_read_from_object(node, ACPI_TYPE_INTEGER, &temp1);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ acpi_os_printf(" (%4.4X/%3.3X) %8.8X%8.8X",
+ bit_length, ACPI_ROUND_BITS_UP_TO_BYTES(bit_length),
+ ACPI_FORMAT_UINT64(temp1->integer.value));
+
+ value_to_write = ACPI_UINT64_MAX >> (64 - bit_length);
+ if (temp1->integer.value == value_to_write) {
+ value_to_write = 0;
+ }
+
+ /* Write a new value */
+
+ write_value.type = ACPI_TYPE_INTEGER;
+ write_value.integer.value = value_to_write;
+ status = acpi_db_write_to_object(node, &write_value);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ /* Ensure that we can read back the new value */
+
+ status = acpi_db_read_from_object(node, ACPI_TYPE_INTEGER, &temp2);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ if (temp2->integer.value != value_to_write) {
+ acpi_os_printf(" MISMATCH 2: %8.8X%8.8X, expecting %8.8X%8.8X",
+ ACPI_FORMAT_UINT64(temp2->integer.value),
+ ACPI_FORMAT_UINT64(value_to_write));
+ }
+
+ /* Write back the original value */
+
+ write_value.integer.value = temp1->integer.value;
+ status = acpi_db_write_to_object(node, &write_value);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ /* Ensure that we can read back the original value */
+
+ status = acpi_db_read_from_object(node, ACPI_TYPE_INTEGER, &temp3);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ if (temp3->integer.value != temp1->integer.value) {
+ acpi_os_printf(" MISMATCH 3: %8.8X%8.8X, expecting %8.8X%8.8X",
+ ACPI_FORMAT_UINT64(temp3->integer.value),
+ ACPI_FORMAT_UINT64(temp1->integer.value));
+ }
+
+exit:
+ if (temp1) {
+ acpi_os_free(temp1);
+ }
+ if (temp2) {
+ acpi_os_free(temp2);
+ }
+ if (temp3) {
+ acpi_os_free(temp3);
+ }
+ return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_db_test_buffer_type
+ *
+ * PARAMETERS: node - Parent NS node for the object
+ * bit_length - Actual length of the object.
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Test read/write for an Buffer-valued object. Performs a
+ * write/read/compare of an arbitrary new value, then performs
+ * a write/read/compare of the original value.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_db_test_buffer_type(struct acpi_namespace_node *node, u32 bit_length)
+{
+ union acpi_object *temp1 = NULL;
+ union acpi_object *temp2 = NULL;
+ union acpi_object *temp3 = NULL;
+ u8 *buffer;
+ union acpi_object write_value;
+ acpi_status status;
+ u32 byte_length;
+ u32 i;
+ u8 extra_bits;
+
+ byte_length = ACPI_ROUND_BITS_UP_TO_BYTES(bit_length);
+ if (byte_length == 0) {
+ acpi_os_printf(" Ignoring zero length buffer");
+ return (AE_OK);
+ }
+
+ /* Allocate a local buffer */
+
+ buffer = ACPI_ALLOCATE_ZEROED(byte_length);
+ if (!buffer) {
+ return (AE_NO_MEMORY);
+ }
+
+ /* Read the original value */
+
+ status = acpi_db_read_from_object(node, ACPI_TYPE_BUFFER, &temp1);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ /* Emit a few bytes of the buffer */
+
+ acpi_os_printf(" (%4.4X/%3.3X)", bit_length, temp1->buffer.length);
+ for (i = 0; ((i < 4) && (i < byte_length)); i++) {
+ acpi_os_printf(" %2.2X", temp1->buffer.pointer[i]);
+ }
+ acpi_os_printf("... ");
+
+ /*
+ * Write a new value.
+ *
+ * Handle possible extra bits at the end of the buffer. Can
+ * happen for field_units larger than an integer, but the bit
+ * count is not an integral number of bytes. Zero out the
+ * unused bits.
+ */
+ memset(buffer, BUFFER_FILL_VALUE, byte_length);
+ extra_bits = bit_length % 8;
+ if (extra_bits) {
+ buffer[byte_length - 1] = ACPI_MASK_BITS_ABOVE(extra_bits);
+ }
+
+ write_value.type = ACPI_TYPE_BUFFER;
+ write_value.buffer.length = byte_length;
+ write_value.buffer.pointer = buffer;
+
+ status = acpi_db_write_to_object(node, &write_value);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ /* Ensure that we can read back the new value */
+
+ status = acpi_db_read_from_object(node, ACPI_TYPE_BUFFER, &temp2);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ if (memcmp(temp2->buffer.pointer, buffer, byte_length)) {
+ acpi_os_printf(" MISMATCH 2: New buffer value");
+ }
+
+ /* Write back the original value */
+
+ write_value.buffer.length = byte_length;
+ write_value.buffer.pointer = temp1->buffer.pointer;
+
+ status = acpi_db_write_to_object(node, &write_value);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ /* Ensure that we can read back the original value */
+
+ status = acpi_db_read_from_object(node, ACPI_TYPE_BUFFER, &temp3);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ if (memcmp(temp1->buffer.pointer, temp3->buffer.pointer, byte_length)) {
+ acpi_os_printf(" MISMATCH 3: While restoring original buffer");
+ }
+
+exit:
+ ACPI_FREE(buffer);
+ if (temp1) {
+ acpi_os_free(temp1);
+ }
+ if (temp2) {
+ acpi_os_free(temp2);
+ }
+ if (temp3) {
+ acpi_os_free(temp3);
+ }
+ return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_db_test_string_type
+ *
+ * PARAMETERS: node - Parent NS node for the object
+ * byte_length - Actual length of the object.
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Test read/write for an String-valued object. Performs a
+ * write/read/compare of an arbitrary new value, then performs
+ * a write/read/compare of the original value.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_db_test_string_type(struct acpi_namespace_node *node, u32 byte_length)
+{
+ union acpi_object *temp1 = NULL;
+ union acpi_object *temp2 = NULL;
+ union acpi_object *temp3 = NULL;
+ char *value_to_write = "Test String from AML Debugger";
+ union acpi_object write_value;
+ acpi_status status;
+
+ /* Read the original value */
+
+ status = acpi_db_read_from_object(node, ACPI_TYPE_STRING, &temp1);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ acpi_os_printf(" (%4.4X/%3.3X) \"%s\"", (temp1->string.length * 8),
+ temp1->string.length, temp1->string.pointer);
+
+ /* Write a new value */
+
+ write_value.type = ACPI_TYPE_STRING;
+ write_value.string.length = strlen(value_to_write);
+ write_value.string.pointer = value_to_write;
+
+ status = acpi_db_write_to_object(node, &write_value);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ /* Ensure that we can read back the new value */
+
+ status = acpi_db_read_from_object(node, ACPI_TYPE_STRING, &temp2);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ if (strcmp(temp2->string.pointer, value_to_write)) {
+ acpi_os_printf(" MISMATCH 2: %s, expecting %s",
+ temp2->string.pointer, value_to_write);
+ }
+
+ /* Write back the original value */
+
+ write_value.string.length = strlen(temp1->string.pointer);
+ write_value.string.pointer = temp1->string.pointer;
+
+ status = acpi_db_write_to_object(node, &write_value);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ /* Ensure that we can read back the original value */
+
+ status = acpi_db_read_from_object(node, ACPI_TYPE_STRING, &temp3);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ if (strcmp(temp1->string.pointer, temp3->string.pointer)) {
+ acpi_os_printf(" MISMATCH 3: %s, expecting %s",
+ temp3->string.pointer, temp1->string.pointer);
+ }
+
+exit:
+ if (temp1) {
+ acpi_os_free(temp1);
+ }
+ if (temp2) {
+ acpi_os_free(temp2);
+ }
+ if (temp3) {
+ acpi_os_free(temp3);
+ }
+ return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_db_read_from_object
+ *
+ * PARAMETERS: node - Parent NS node for the object
+ * expected_type - Object type expected from the read
+ * value - Where the value read is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Performs a read from the specified object by invoking the
+ * special debugger control method that reads the object. Thus,
+ * the AML interpreter is doing all of the work, increasing the
+ * validity of the test.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_db_read_from_object(struct acpi_namespace_node *node,
+ acpi_object_type expected_type,
+ union acpi_object **value)
+{
+ union acpi_object *ret_value;
+ struct acpi_object_list param_objects;
+ union acpi_object params[2];
+ struct acpi_buffer return_obj;
+ acpi_status status;
+
+ params[0].type = ACPI_TYPE_LOCAL_REFERENCE;
+ params[0].reference.actual_type = node->type;
+ params[0].reference.handle = ACPI_CAST_PTR(acpi_handle, node);
+
+ param_objects.count = 1;
+ param_objects.pointer = params;
+
+ return_obj.length = ACPI_ALLOCATE_BUFFER;
+
+ acpi_gbl_method_executing = TRUE;
+ status = acpi_evaluate_object(read_handle, NULL,
+ &param_objects, &return_obj);
+ acpi_gbl_method_executing = FALSE;
+
+ if (ACPI_FAILURE(status)) {
+ acpi_os_printf("Could not read from object, %s",
+ acpi_format_exception(status));
+ return (status);
+ }
+
+ ret_value = (union acpi_object *)return_obj.pointer;
+
+ switch (ret_value->type) {
+ case ACPI_TYPE_INTEGER:
+ case ACPI_TYPE_BUFFER:
+ case ACPI_TYPE_STRING:
+ /*
+ * Did we receive the type we wanted? Most important for the
+ * Integer/Buffer case (when a field is larger than an Integer,
+ * it should return a Buffer).
+ */
+ if (ret_value->type != expected_type) {
+ acpi_os_printf
+ (" Type mismatch: Expected %s, Received %s",
+ acpi_ut_get_type_name(expected_type),
+ acpi_ut_get_type_name(ret_value->type));
+
+ return (AE_TYPE);
+ }
+
+ *value = ret_value;
+ break;
+
+ default:
+
+ acpi_os_printf(" Unsupported return object type, %s",
+ acpi_ut_get_type_name(ret_value->type));
+
+ acpi_os_free(return_obj.pointer);
+ return (AE_TYPE);
+ }
+
+ return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_db_write_to_object
+ *
+ * PARAMETERS: node - Parent NS node for the object
+ * value - Value to be written
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Performs a write to the specified object by invoking the
+ * special debugger control method that writes the object. Thus,
+ * the AML interpreter is doing all of the work, increasing the
+ * validity of the test.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_db_write_to_object(struct acpi_namespace_node *node,
+ union acpi_object *value)
+{
+ struct acpi_object_list param_objects;
+ union acpi_object params[2];
+ acpi_status status;
+
+ params[0].type = ACPI_TYPE_LOCAL_REFERENCE;
+ params[0].reference.actual_type = node->type;
+ params[0].reference.handle = ACPI_CAST_PTR(acpi_handle, node);
+
+ /* Copy the incoming user parameter */
+
+ memcpy(&params[1], value, sizeof(union acpi_object));
+
+ param_objects.count = 2;
+ param_objects.pointer = params;
+
+ acpi_gbl_method_executing = TRUE;
+ status = acpi_evaluate_object(write_handle, NULL, &param_objects, NULL);
+ acpi_gbl_method_executing = FALSE;
+
+ if (ACPI_FAILURE(status)) {
+ acpi_os_printf("Could not write to object, %s",
+ acpi_format_exception(status));
+ }
+
+ return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_db_evaluate_all_predefined_names
+ *
+ * PARAMETERS: count_arg - Max number of methods to execute
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Namespace batch execution. Execute predefined names in the
+ * namespace, up to the max count, if specified.
+ *
+ ******************************************************************************/
+
+static void acpi_db_evaluate_all_predefined_names(char *count_arg)
+{
+ struct acpi_db_execute_walk info;
+
+ info.count = 0;
+ info.max_count = ACPI_UINT32_MAX;
+
+ if (count_arg) {
+ info.max_count = strtoul(count_arg, NULL, 0);
+ }
+
+ /* Search all nodes in namespace */
+
+ (void)acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX,
+ acpi_db_evaluate_one_predefined_name, NULL,
+ (void *)&info, NULL);
+
+ acpi_os_printf("Evaluated %u predefined names in the namespace\n",
+ info.count);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_db_evaluate_one_predefined_name
+ *
+ * PARAMETERS: Callback from walk_namespace
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Batch execution module. Currently only executes predefined
+ * ACPI names.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_db_evaluate_one_predefined_name(acpi_handle obj_handle,
+ u32 nesting_level,
+ void *context, void **return_value)
+{
+ struct acpi_namespace_node *node =
+ (struct acpi_namespace_node *)obj_handle;
+ struct acpi_db_execute_walk *info =
+ (struct acpi_db_execute_walk *)context;
+ char *pathname;
+ const union acpi_predefined_info *predefined;
+ struct acpi_device_info *obj_info;
+ struct acpi_object_list param_objects;
+ union acpi_object params[ACPI_METHOD_NUM_ARGS];
+ union acpi_object *this_param;
+ struct acpi_buffer return_obj;
+ acpi_status status;
+ u16 arg_type_list;
+ u8 arg_count;
+ u8 arg_type;
+ u32 i;
+
+ /* The name must be a predefined ACPI name */
+
+ predefined = acpi_ut_match_predefined_method(node->name.ascii);
+ if (!predefined) {
+ return (AE_OK);
+ }
+
+ if (node->type == ACPI_TYPE_LOCAL_SCOPE) {
+ return (AE_OK);
+ }
+
+ pathname = acpi_ns_get_external_pathname(node);
+ if (!pathname) {
+ return (AE_OK);
+ }
+
+ /* Get the object info for number of method parameters */
+
+ status = acpi_get_object_info(obj_handle, &obj_info);
+ if (ACPI_FAILURE(status)) {
+ ACPI_FREE(pathname);
+ return (status);
+ }
+
+ param_objects.count = 0;
+ param_objects.pointer = NULL;
+
+ if (obj_info->type == ACPI_TYPE_METHOD) {
+
+ /* Setup default parameters (with proper types) */
+
+ arg_type_list = predefined->info.argument_list;
+ arg_count = METHOD_GET_ARG_COUNT(arg_type_list);
+
+ /*
+ * Setup the ACPI-required number of arguments, regardless of what
+ * the actual method defines. If there is a difference, then the
+ * method is wrong and a warning will be issued during execution.
+ */
+ this_param = params;
+ for (i = 0; i < arg_count; i++) {
+ arg_type = METHOD_GET_NEXT_TYPE(arg_type_list);
+ this_param->type = arg_type;
+
+ switch (arg_type) {
+ case ACPI_TYPE_INTEGER:
+
+ this_param->integer.value = 1;
+ break;
+
+ case ACPI_TYPE_STRING:
+
+ this_param->string.pointer =
+ "This is the default argument string";
+ this_param->string.length =
+ strlen(this_param->string.pointer);
+ break;
+
+ case ACPI_TYPE_BUFFER:
+
+ this_param->buffer.pointer = (u8 *)params; /* just a garbage buffer */
+ this_param->buffer.length = 48;
+ break;
+
+ case ACPI_TYPE_PACKAGE:
+
+ this_param->package.elements = NULL;
+ this_param->package.count = 0;
+ break;
+
+ default:
+
+ acpi_os_printf
+ ("%s: Unsupported argument type: %u\n",
+ pathname, arg_type);
+ break;
+ }
+
+ this_param++;
+ }
+
+ param_objects.count = arg_count;
+ param_objects.pointer = params;
+ }
+
+ ACPI_FREE(obj_info);
+ return_obj.pointer = NULL;
+ return_obj.length = ACPI_ALLOCATE_BUFFER;
+
+ /* Do the actual method execution */
+
+ acpi_gbl_method_executing = TRUE;
+
+ status = acpi_evaluate_object(node, NULL, &param_objects, &return_obj);
+
+ acpi_os_printf("%-32s returned %s\n",
+ pathname, acpi_format_exception(status));
+ acpi_gbl_method_executing = FALSE;
+ ACPI_FREE(pathname);
+
+ /* Ignore status from method execution */
+
+ status = AE_OK;
+
+ /* Update count, check if we have executed enough methods */
+
+ info->count++;
+ if (info->count >= info->max_count) {
+ status = AE_CTRL_TERMINATE;
+ }
+
+ return (status);
+}
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