patch-2.4.6 linux/drivers/acpi/executer/excreate.c

• Lines: 707
• Date: Wed Jun 20 17:47:40 2001
• Orig file: v2.4.5/linux/drivers/acpi/executer/excreate.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/executer/excreate.c linux/drivers/acpi/executer/excreate.c
@@ -0,0 +1,706 @@
+/******************************************************************************
+ *
+ * Module Name: excreate - Named object creation
+ *              $Revision: 63 $
+ *
+ *****************************************************************************/
+
+/*
+ *  Copyright (C) 2000, 2001 R. Byron Moore
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include "acpi.h"
+#include "acparser.h"
+#include "acinterp.h"
+#include "amlcode.h"
+#include "acnamesp.h"
+#include "acevents.h"
+#include "acdispat.h"
+
+
+#define _COMPONENT          ACPI_EXECUTER
+	 MODULE_NAME         ("excreate")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_create_buffer_field
+ *
+ * PARAMETERS:  Opcode              - The opcode to be executed
+ *              Operands            - List of operands for the opcode
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute Create_field operators: Create_bit_field_op,
+ *              Create_byte_field_op, Create_word_field_op, Create_dWord_field_op,
+ *              Create_field_op (which define fields in buffers)
+ *
+ * ALLOCATION:  Deletes Create_field_op's count operand descriptor
+ *
+ *
+ *  ACPI SPECIFICATION REFERENCES:
+ *  Def_create_bit_field := Create_bit_field_op Src_buf Bit_idx   Name_string
+ *  Def_create_byte_field := Create_byte_field_op Src_buf Byte_idx Name_string
+ *  Def_create_dWord_field := Create_dWord_field_op Src_buf Byte_idx Name_string
+ *  Def_create_field    :=  Create_field_op     Src_buf Bit_idx   Num_bits    Name_string
+ *  Def_create_word_field := Create_word_field_op Src_buf Byte_idx Name_string
+ *  Bit_index           :=  Term_arg=>Integer
+ *  Byte_index          :=  Term_arg=>Integer
+ *  Num_bits            :=  Term_arg=>Integer
+ *  Source_buff         :=  Term_arg=>Buffer
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_ex_create_buffer_field (
+	u8                      *aml_ptr,
+	u32                     aml_length,
+	ACPI_NAMESPACE_NODE     *node,
+	ACPI_WALK_STATE         *walk_state)
+{
+	ACPI_STATUS             status;
+	ACPI_OPERAND_OBJECT     *obj_desc;
+	ACPI_OPERAND_OBJECT     *tmp_desc;
+
+
+	/* Create the descriptor */
+
+	obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER_FIELD);
+	if (!obj_desc) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+
+	/*
+	 * Allocate a method object for this field unit
+	 */
+
+	obj_desc->buffer_field.extra = acpi_ut_create_internal_object (
+			   INTERNAL_TYPE_EXTRA);
+	if (!obj_desc->buffer_field.extra) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	/*
+	 * Remember location in AML stream of the field unit
+	 * opcode and operands -- since the buffer and index
+	 * operands must be evaluated.
+	 */
+
+	obj_desc->buffer_field.extra->extra.pcode     = aml_ptr;
+	obj_desc->buffer_field.extra->extra.pcode_length = aml_length;
+	obj_desc->buffer_field.node = node;
+
+
+	/*
+	 * This operation is supposed to cause the destination Name to refer
+	 * to the defined Buffer_field -- it must not store the constructed
+	 * Buffer_field object (or its current value) in some location that the
+	 * Name may already be pointing to.  So, if the Name currently contains
+	 * a reference which would cause Acpi_ex_store() to perform an indirect
+	 * store rather than setting the value of the Name itself, clobber that
+	 * reference before calling Acpi_ex_store().
+	 */
+
+	/* Type of Name's existing value */
+
+	switch (acpi_ns_get_type (node)) {
+
+	case ACPI_TYPE_BUFFER_FIELD:
+	case INTERNAL_TYPE_ALIAS:
+	case INTERNAL_TYPE_REGION_FIELD:
+	case INTERNAL_TYPE_BANK_FIELD:
+	case INTERNAL_TYPE_INDEX_FIELD:
+
+		tmp_desc = acpi_ns_get_attached_object (node);
+		if (tmp_desc) {
+			/*
+			 * There is an existing object here;  delete it and zero out the
+			 * object field within the Node
+			 */
+
+			acpi_ut_remove_reference (tmp_desc);
+			acpi_ns_attach_object ((ACPI_NAMESPACE_NODE *) node, NULL,
+					 ACPI_TYPE_ANY);
+		}
+
+		/* Set the type to ANY (or the store below will fail) */
+
+		((ACPI_NAMESPACE_NODE *) node)->type = ACPI_TYPE_ANY;
+
+		break;
+
+
+	default:
+
+		break;
+	}
+
+
+	/* Store constructed field descriptor in result location */
+
+	status = acpi_ex_store (obj_desc, (ACPI_OPERAND_OBJECT *) node,
+			  walk_state);
+
+	/*
+	 * If the field descriptor was not physically stored (or if a failure
+	 * above), we must delete it
+	 */
+	if (obj_desc->common.reference_count <= 1) {
+		acpi_ut_remove_reference (obj_desc);
+	}
+
+
+	return (AE_OK);
+
+
+cleanup:
+
+	/* Delete region object and method subobject */
+
+	if (obj_desc) {
+		/* Remove deletes both objects! */
+
+		acpi_ut_remove_reference (obj_desc);
+		obj_desc = NULL;
+	}
+
+	return (status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_create_alias
+ *
+ * PARAMETERS:  Walk_state           - Current state, contains List of
+ *                                      operands for the opcode
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Create a new named alias
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+acpi_ex_create_alias (
+	ACPI_WALK_STATE         *walk_state)
+{
+	ACPI_NAMESPACE_NODE     *source_node;
+	ACPI_NAMESPACE_NODE     *alias_node;
+	ACPI_STATUS             status;
+
+
+	/* Get the source/alias operands (both namespace nodes) */
+
+	status = acpi_ds_obj_stack_pop_object ((ACPI_OPERAND_OBJECT **) &source_node,
+			 walk_state);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	/*
+	 * Don't pop it, it gets removed in the calling routine
+	 */
+	alias_node = acpi_ds_obj_stack_get_value (0, walk_state);
+
+	/* Add an additional reference to the object */
+
+	acpi_ut_add_reference (source_node->object);
+
+	/*
+	 * Attach the original source Node to the new Alias Node.
+	 */
+	status = acpi_ns_attach_object (alias_node, source_node->object,
+			   source_node->type);
+
+
+	/*
+	 * The new alias assumes the type of the source, but it points
+	 * to the same object.  The reference count of the object has two
+	 * additional references to prevent deletion out from under either the
+	 * source or the alias Node
+	 */
+
+	/* Since both operands are Nodes, we don't need to delete them */
+
+	return (status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_create_event
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Create a new event object
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+acpi_ex_create_event (
+	ACPI_WALK_STATE         *walk_state)
+{
+	ACPI_STATUS             status;
+	ACPI_OPERAND_OBJECT     *obj_desc;
+
+
+ BREAKPOINT3;
+
+	obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_EVENT);
+	if (!obj_desc) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	/* Create the actual OS semaphore */
+
+	/* TBD: [Investigate] should be created with 0 or 1 units? */
+
+	status = acpi_os_create_semaphore (ACPI_NO_UNIT_LIMIT, 1,
+			   &obj_desc->event.semaphore);
+	if (ACPI_FAILURE (status)) {
+		acpi_ut_remove_reference (obj_desc);
+		goto cleanup;
+	}
+
+	/* Attach object to the Node */
+
+	status = acpi_ns_attach_object (acpi_ds_obj_stack_get_value (0, walk_state),
+			   obj_desc, (u8) ACPI_TYPE_EVENT);
+	if (ACPI_FAILURE (status)) {
+		acpi_os_delete_semaphore (obj_desc->event.semaphore);
+		acpi_ut_remove_reference (obj_desc);
+		goto cleanup;
+	}
+
+
+cleanup:
+
+	return (status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_create_mutex
+ *
+ * PARAMETERS:  Interpreter_mode    - Current running mode (load1/Load2/Exec)
+ *              Operands            - List of operands for the opcode
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Create a new mutex object
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+acpi_ex_create_mutex (
+	ACPI_WALK_STATE         *walk_state)
+{
+	ACPI_STATUS             status = AE_OK;
+	ACPI_OPERAND_OBJECT     *sync_desc;
+	ACPI_OPERAND_OBJECT     *obj_desc;
+
+
+	/* Get the operand */
+
+	status = acpi_ds_obj_stack_pop_object (&sync_desc, walk_state);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	/* Attempt to allocate a new object */
+
+	obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_MUTEX);
+	if (!obj_desc) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	/* Create the actual OS semaphore */
+
+	status = acpi_os_create_semaphore (1, 1, &obj_desc->mutex.semaphore);
+	if (ACPI_FAILURE (status)) {
+		acpi_ut_remove_reference (obj_desc);
+		goto cleanup;
+	}
+
+	obj_desc->mutex.sync_level = (u8) sync_desc->integer.value;
+
+	/* Obj_desc was on the stack top, and the name is below it */
+
+	status = acpi_ns_attach_object (acpi_ds_obj_stack_get_value (0, walk_state),
+			  obj_desc, (u8) ACPI_TYPE_MUTEX);
+	if (ACPI_FAILURE (status)) {
+		acpi_os_delete_semaphore (obj_desc->mutex.semaphore);
+		acpi_ut_remove_reference (obj_desc);
+		goto cleanup;
+	}
+
+
+cleanup:
+
+	/* Always delete the operand */
+
+	acpi_ut_remove_reference (sync_desc);
+
+	return (status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_create_region
+ *
+ * PARAMETERS:  Aml_ptr             - Pointer to the region declaration AML
+ *              Aml_length          - Max length of the declaration AML
+ *              Operands            - List of operands for the opcode
+ *              Interpreter_mode    - Load1/Load2/Execute
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Create a new operation region object
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+acpi_ex_create_region (
+	u8                      *aml_ptr,
+	u32                     aml_length,
+	u8                      region_space,
+	ACPI_WALK_STATE         *walk_state)
+{
+	ACPI_STATUS             status;
+	ACPI_OPERAND_OBJECT     *obj_desc;
+	ACPI_NAMESPACE_NODE     *node;
+
+
+	/*
+	 * Space ID must be one of the predefined IDs, or in the user-defined
+	 * range
+	 */
+	if ((region_space >= NUM_REGION_TYPES) &&
+		(region_space < USER_REGION_BEGIN)) {
+		REPORT_ERROR (("Invalid Address_space type %X\n", region_space));
+		return (AE_AML_INVALID_SPACE_ID);
+	}
+
+
+	/* Get the Node from the object stack  */
+
+	node = (ACPI_NAMESPACE_NODE *) acpi_ds_obj_stack_get_value (0, walk_state);
+
+	/* Create the region descriptor */
+
+	obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_REGION);
+	if (!obj_desc) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	/*
+	 * Allocate a method object for this region.
+	 */
+
+	obj_desc->region.extra = acpi_ut_create_internal_object (
+			 INTERNAL_TYPE_EXTRA);
+	if (!obj_desc->region.extra) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	/*
+	 * Remember location in AML stream of address & length
+	 * operands since they need to be evaluated at run time.
+	 */
+
+	obj_desc->region.extra->extra.pcode      = aml_ptr;
+	obj_desc->region.extra->extra.pcode_length = aml_length;
+
+	/* Init the region from the operands */
+
+	obj_desc->region.space_id     = region_space;
+	obj_desc->region.address      = 0;
+	obj_desc->region.length       = 0;
+
+
+	/* Install the new region object in the parent Node */
+
+	obj_desc->region.node = node;
+
+	status = acpi_ns_attach_object (node, obj_desc,
+			  (u8) ACPI_TYPE_REGION);
+
+	if (ACPI_FAILURE (status)) {
+		goto cleanup;
+	}
+
+	/*
+	 * If we have a valid region, initialize it
+	 * Namespace is NOT locked at this point.
+	 */
+
+	status = acpi_ev_initialize_region (obj_desc, FALSE);
+
+	if (ACPI_FAILURE (status)) {
+		/*
+		 *  If AE_NOT_EXIST is returned, it is not fatal
+		 *  because many regions get created before a handler
+		 *  is installed for said region.
+		 */
+		if (AE_NOT_EXIST == status) {
+			status = AE_OK;
+		}
+	}
+
+cleanup:
+
+	if (ACPI_FAILURE (status)) {
+		/* Delete region object and method subobject */
+
+		if (obj_desc) {
+			/* Remove deletes both objects! */
+
+			acpi_ut_remove_reference (obj_desc);
+			obj_desc = NULL;
+		}
+	}
+
+	return (status);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_create_processor
+ *
+ * PARAMETERS:  Op              - Op containing the Processor definition and
+ *                                args
+ *              Processor_node  - Parent Node for the processor object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Create a new processor object and populate the fields
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+acpi_ex_create_processor (
+	ACPI_PARSE_OBJECT       *op,
+	ACPI_NAMESPACE_NODE     *processor_node)
+{
+	ACPI_STATUS             status;
+	ACPI_PARSE_OBJECT       *arg;
+	ACPI_OPERAND_OBJECT     *obj_desc;
+
+
+	obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_PROCESSOR);
+	if (!obj_desc) {
+		return (AE_NO_MEMORY);
+	}
+
+	/* Install the new processor object in the parent Node */
+
+	status = acpi_ns_attach_object (processor_node, obj_desc,
+			   (u8) ACPI_TYPE_PROCESSOR);
+	if (ACPI_FAILURE (status)) {
+		acpi_ut_delete_object_desc (obj_desc);
+		return (status);
+	}
+
+	/* Get first arg and verify existence */
+
+	arg = op->value.arg;
+	if (!arg) {
+		return (AE_AML_NO_OPERAND);
+	}
+
+	/* First arg is the Processor ID */
+
+	obj_desc->processor.proc_id = (u8) arg->value.integer;
+
+	/* Get second arg and verify existence */
+
+	arg = arg->next;
+	if (!arg) {
+		return (AE_AML_NO_OPERAND);
+	}
+
+	/* Second arg is the PBlock Address */
+
+	obj_desc->processor.address = (ACPI_IO_ADDRESS) arg->value.integer;
+
+	/* Get third arg and verify existence */
+
+	arg = arg->next;
+	if (!arg) {
+		return (AE_AML_NO_OPERAND);
+	}
+
+	/* Third arg is the PBlock Length */
+
+	obj_desc->processor.length = (u8) arg->value.integer;
+	return (AE_OK);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_create_power_resource
+ *
+ * PARAMETERS:  Op              - Op containing the Power_resource definition
+ *                                and args
+ *              Power_node      - Parent Node for the power object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Create a new Power_resource object and populate the fields
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+acpi_ex_create_power_resource (
+	ACPI_PARSE_OBJECT       *op,
+	ACPI_NAMESPACE_NODE     *power_node)
+{
+	ACPI_STATUS             status;
+	ACPI_PARSE_OBJECT       *arg;
+	ACPI_OPERAND_OBJECT     *obj_desc;
+
+
+	obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_POWER);
+	if (!obj_desc) {
+		return (AE_NO_MEMORY);
+	}
+
+	/* Install the new power resource object in the parent Node */
+
+	status = acpi_ns_attach_object (power_node, obj_desc,
+			  (u8) ACPI_TYPE_POWER);
+	if (ACPI_FAILURE (status)) {
+		return(status);
+	}
+
+
+	/* Get first arg and verify existence */
+
+	arg = op->value.arg;
+	if (!arg) {
+		return (AE_AML_NO_OPERAND);
+	}
+
+	/* First arg is the System_level */
+
+	obj_desc->power_resource.system_level = (u8) arg->value.integer;
+
+	/* Get second arg and check existence */
+
+	arg = arg->next;
+	if (!arg) {
+		return (AE_AML_NO_OPERAND);
+	}
+
+	/* Second arg is the PBlock Address */
+
+	obj_desc->power_resource.resource_order = (u16) arg->value.integer;
+
+	return (AE_OK);
+}
+
+
+/*****************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_create_method
+ *
+ * PARAMETERS:  Aml_ptr         - First byte of the method's AML
+ *              Aml_length      - AML byte count for this method
+ *              Method_flags    - AML method flag byte
+ *              Method          - Method Node
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Create a new method object
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+acpi_ex_create_method (
+	u8                      *aml_ptr,
+	u32                     aml_length,
+	u32                     method_flags,
+	ACPI_NAMESPACE_NODE     *method)
+{
+	ACPI_OPERAND_OBJECT     *obj_desc;
+	ACPI_STATUS             status;
+
+
+	/* Create a new method object */
+
+	obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_METHOD);
+	if (!obj_desc) {
+	   return (AE_NO_MEMORY);
+	}
+
+	/* Get the method's AML pointer/length from the Op */
+
+	obj_desc->method.pcode      = aml_ptr;
+	obj_desc->method.pcode_length = aml_length;
+
+	/*
+	 * First argument is the Method Flags (contains parameter count for the
+	 * method)
+	 */
+
+	obj_desc->method.method_flags = (u8) method_flags;
+	obj_desc->method.param_count = (u8) (method_flags &
+			  METHOD_FLAGS_ARG_COUNT);
+
+	/*
+	 * Get the concurrency count.  If required, a semaphore will be
+	 * created for this method when it is parsed.
+	 */
+	if (method_flags & METHOD_FLAGS_SERIALIZED) {
+		/*
+		 * ACPI 1.0: Concurrency = 1
+		 * ACPI 2.0: Concurrency = (Sync_level (in method declaration) + 1)
+		 */
+		obj_desc->method.concurrency = (u8)
+				  (((method_flags & METHOD_FLAGS_SYNCH_LEVEL) >> 4) + 1);
+	}
+
+	else {
+		obj_desc->method.concurrency = INFINITE_CONCURRENCY;
+	}
+
+	/* Attach the new object to the method Node */
+
+	status = acpi_ns_attach_object (method, obj_desc, (u8) ACPI_TYPE_METHOD);
+	if (ACPI_FAILURE (status)) {
+		acpi_ut_delete_object_desc (obj_desc);
+	}
+
+	return (status);
+}
+
+