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ubuntu-linux-kernel/drivers/acpi/acpica/dbtest.c

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2024-04-01 15:06:58 +00:00
/*******************************************************************************
*
* Module Name: dbtest - Various debug-related tests
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2017, 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_normalized_pathname(node, TRUE);
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);
}