[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / acpica / dsargs.c

/******************************************************************************
 *
 * Module Name: dsargs - Support for execution of dynamic arguments for static
 *                       objects (regions, fields, buffer fields, etc.)
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2011, 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 "acparser.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acnamesp.h"

#define _COMPONENT          ACPI_DISPATCHER
ACPI_MODULE_NAME("dsargs")

/* Local prototypes */
static acpi_status
acpi_ds_execute_arguments(struct acpi_namespace_node *node,
			  struct acpi_namespace_node *scope_node,
			  u32 aml_length, u8 *aml_start);

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_execute_arguments
 *
 * PARAMETERS:  Node                - Object NS node
 *              scope_node          - Parent NS node
 *              aml_length          - Length of executable AML
 *              aml_start           - Pointer to the AML
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Late (deferred) execution of region or field arguments
 *
 ******************************************************************************/

static acpi_status
acpi_ds_execute_arguments(struct acpi_namespace_node *node,
			  struct acpi_namespace_node *scope_node,
			  u32 aml_length, u8 *aml_start)
{
	acpi_status status;
	union acpi_parse_object *op;
	struct acpi_walk_state *walk_state;

	ACPI_FUNCTION_TRACE(ds_execute_arguments);

	/* Allocate a new parser op to be the root of the parsed tree */

	op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
	if (!op) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	/* Save the Node for use in acpi_ps_parse_aml */

	op->common.node = scope_node;

	/* Create and initialize a new parser state */

	walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
	if (!walk_state) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
				       aml_length, NULL, ACPI_IMODE_LOAD_PASS1);
	if (ACPI_FAILURE(status)) {
		acpi_ds_delete_walk_state(walk_state);
		goto cleanup;
	}

	/* Mark this parse as a deferred opcode */

	walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP;
	walk_state->deferred_node = node;

	/* Pass1: Parse the entire declaration */

	status = acpi_ps_parse_aml(walk_state);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	/* Get and init the Op created above */

	op->common.node = node;
	acpi_ps_delete_parse_tree(op);

	/* Evaluate the deferred arguments */

	op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
	if (!op) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	op->common.node = scope_node;

	/* Create and initialize a new parser state */

	walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
	if (!walk_state) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/* Execute the opcode and arguments */

	status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
				       aml_length, NULL, ACPI_IMODE_EXECUTE);
	if (ACPI_FAILURE(status)) {
		acpi_ds_delete_walk_state(walk_state);
		goto cleanup;
	}

	/* Mark this execution as a deferred opcode */

	walk_state->deferred_node = node;
	status = acpi_ps_parse_aml(walk_state);

      cleanup:
	acpi_ps_delete_parse_tree(op);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_get_buffer_field_arguments
 *
 * PARAMETERS:  obj_desc        - A valid buffer_field object
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late
 *              evaluation of these field attributes.
 *
 ******************************************************************************/

acpi_status
acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc)
{
	union acpi_operand_object *extra_desc;
	struct acpi_namespace_node *node;
	acpi_status status;

	ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments, obj_desc);

	if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
		return_ACPI_STATUS(AE_OK);
	}

	/* Get the AML pointer (method object) and buffer_field node */

	extra_desc = acpi_ns_get_secondary_object(obj_desc);
	node = obj_desc->buffer_field.node;

	ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_BUFFER_FIELD,
						      node, NULL));

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n",
			  acpi_ut_get_node_name(node)));

	/* Execute the AML code for the term_arg arguments */

	status = acpi_ds_execute_arguments(node, node->parent,
					   extra_desc->extra.aml_length,
					   extra_desc->extra.aml_start);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_get_bank_field_arguments
 *
 * PARAMETERS:  obj_desc        - A valid bank_field object
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Get bank_field bank_value. This implements the late
 *              evaluation of these field attributes.
 *
 ******************************************************************************/

acpi_status
acpi_ds_get_bank_field_arguments(union acpi_operand_object *obj_desc)
{
	union acpi_operand_object *extra_desc;
	struct acpi_namespace_node *node;
	acpi_status status;

	ACPI_FUNCTION_TRACE_PTR(ds_get_bank_field_arguments, obj_desc);

	if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
		return_ACPI_STATUS(AE_OK);
	}

	/* Get the AML pointer (method object) and bank_field node */

	extra_desc = acpi_ns_get_secondary_object(obj_desc);
	node = obj_desc->bank_field.node;

	ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
			(ACPI_TYPE_LOCAL_BANK_FIELD, node, NULL));

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BankField Arg Init\n",
			  acpi_ut_get_node_name(node)));

	/* Execute the AML code for the term_arg arguments */

	status = acpi_ds_execute_arguments(node, node->parent,
					   extra_desc->extra.aml_length,
					   extra_desc->extra.aml_start);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_get_buffer_arguments
 *
 * PARAMETERS:  obj_desc        - A valid Buffer object
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Get Buffer length and initializer byte list. This implements
 *              the late evaluation of these attributes.
 *
 ******************************************************************************/

acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc)
{
	struct acpi_namespace_node *node;
	acpi_status status;

	ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments, obj_desc);

	if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
		return_ACPI_STATUS(AE_OK);
	}

	/* Get the Buffer node */

	node = obj_desc->buffer.node;
	if (!node) {
		ACPI_ERROR((AE_INFO,
			    "No pointer back to namespace node in buffer object %p",
			    obj_desc));
		return_ACPI_STATUS(AE_AML_INTERNAL);
	}

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n"));

	/* Execute the AML code for the term_arg arguments */

	status = acpi_ds_execute_arguments(node, node,
					   obj_desc->buffer.aml_length,
					   obj_desc->buffer.aml_start);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_get_package_arguments
 *
 * PARAMETERS:  obj_desc        - A valid Package object
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Get Package length and initializer byte list. This implements
 *              the late evaluation of these attributes.
 *
 ******************************************************************************/

acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc)
{
	struct acpi_namespace_node *node;
	acpi_status status;

	ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments, obj_desc);

	if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
		return_ACPI_STATUS(AE_OK);
	}

	/* Get the Package node */

	node = obj_desc->package.node;
	if (!node) {
		ACPI_ERROR((AE_INFO,
			    "No pointer back to namespace node in package %p",
			    obj_desc));
		return_ACPI_STATUS(AE_AML_INTERNAL);
	}

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Arg Init\n"));

	/* Execute the AML code for the term_arg arguments */

	status = acpi_ds_execute_arguments(node, node,
					   obj_desc->package.aml_length,
					   obj_desc->package.aml_start);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_get_region_arguments
 *
 * PARAMETERS:  obj_desc        - A valid region object
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Get region address and length. This implements the late
 *              evaluation of these region attributes.
 *
 ******************************************************************************/

acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc)
{
	struct acpi_namespace_node *node;
	acpi_status status;
	union acpi_operand_object *extra_desc;

	ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments, obj_desc);

	if (obj_desc->region.flags & AOPOBJ_DATA_VALID) {
		return_ACPI_STATUS(AE_OK);
	}

	extra_desc = acpi_ns_get_secondary_object(obj_desc);
	if (!extra_desc) {
		return_ACPI_STATUS(AE_NOT_EXIST);
	}

	/* Get the Region node */

	node = obj_desc->region.node;

	ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
			(ACPI_TYPE_REGION, node, NULL));

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] OpRegion Arg Init at AML %p\n",
			  acpi_ut_get_node_name(node),
			  extra_desc->extra.aml_start));

	/* Execute the argument AML */

	status = acpi_ds_execute_arguments(node, node->parent,
					   extra_desc->extra.aml_length,
					   extra_desc->extra.aml_start);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Validate the region address/length via the host OS */

	status = acpi_os_validate_address(obj_desc->region.space_id,
					  obj_desc->region.address,
					  (acpi_size) obj_desc->region.length,
					  acpi_ut_get_node_name(node));

	if (ACPI_FAILURE(status)) {
		/*
		 * Invalid address/length. We will emit an error message and mark
		 * the region as invalid, so that it will cause an additional error if
		 * it is ever used. Then return AE_OK.
		 */
		ACPI_EXCEPTION((AE_INFO, status,
				"During address validation of OpRegion [%4.4s]",
				node->name.ascii));
		obj_desc->common.flags |= AOPOBJ_INVALID;
		status = AE_OK;
	}

	return_ACPI_STATUS(status);
}
Commit	Line	Data
9ad19ac4 BM	1	/******************************************************************************
	2	*
	3	* Module Name: dsargs - Support for execution of dynamic arguments for static
	4	* objects (regions, fields, buffer fields, etc.)
	5	*
	6	*****************************************************************************/
	7
	8	/*
	9	* Copyright (C) 2000 - 2011, Intel Corp.
	10	* All rights reserved.
	11	*
	12	* Redistribution and use in source and binary forms, with or without
	13	* modification, are permitted provided that the following conditions
	14	* are met:
	15	* 1. Redistributions of source code must retain the above copyright
	16	* notice, this list of conditions, and the following disclaimer,
	17	* without modification.
	18	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	19	* substantially similar to the "NO WARRANTY" disclaimer below
	20	* ("Disclaimer") and any redistribution must be conditioned upon
	21	* including a substantially similar Disclaimer requirement for further
	22	* binary redistribution.
	23	* 3. Neither the names of the above-listed copyright holders nor the names
	24	* of any contributors may be used to endorse or promote products derived
	25	* from this software without specific prior written permission.
	26	*
	27	* Alternatively, this software may be distributed under the terms of the
	28	* GNU General Public License ("GPL") version 2 as published by the Free
	29	* Software Foundation.
	30	*
	31	* NO WARRANTY
	32	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	33	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	34	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	35	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	36	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	37	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	38	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	39	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	40	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	41	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	42	* POSSIBILITY OF SUCH DAMAGES.
	43	*/
	44
	45	#include <acpi/acpi.h>
	46	#include "accommon.h"
	47	#include "acparser.h"
	48	#include "amlcode.h"
	49	#include "acdispat.h"
	50	#include "acnamesp.h"
	51
	52	#define _COMPONENT ACPI_DISPATCHER
	53	ACPI_MODULE_NAME("dsargs")
	54
	55	/* Local prototypes */
	56	static acpi_status
	57	acpi_ds_execute_arguments(struct acpi_namespace_node *node,
	58	struct acpi_namespace_node *scope_node,
	59	u32 aml_length, u8 *aml_start);
	60
	61	/*******************************************************************************
	62	*
	63	* FUNCTION: acpi_ds_execute_arguments
	64	*
65	* PARAMETERS: Node - Object NS node
66	* scope_node - Parent NS node
67	* aml_length - Length of executable AML
68	* aml_start - Pointer to the AML
69	*
70	* RETURN: Status.
71	*
72	* DESCRIPTION: Late (deferred) execution of region or field arguments
73	*
74	******************************************************************************/
75
76	static acpi_status
77	acpi_ds_execute_arguments(struct acpi_namespace_node *node,
78	struct acpi_namespace_node *scope_node,
79	u32 aml_length, u8 *aml_start)
80	{
81	acpi_status status;
82	union acpi_parse_object *op;
83	struct acpi_walk_state *walk_state;
84
85	ACPI_FUNCTION_TRACE(ds_execute_arguments);
86
87	/* Allocate a new parser op to be the root of the parsed tree */
88
89	op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
90	if (!op) {
91	return_ACPI_STATUS(AE_NO_MEMORY);
92	}
93
94	/* Save the Node for use in acpi_ps_parse_aml */
95
96	op->common.node = scope_node;
97
98	/* Create and initialize a new parser state */
99
100	walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
101	if (!walk_state) {
102	status = AE_NO_MEMORY;
103	goto cleanup;
104	}
105
106	status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
107	aml_length, NULL, ACPI_IMODE_LOAD_PASS1);
108	if (ACPI_FAILURE(status)) {
109	acpi_ds_delete_walk_state(walk_state);
110	goto cleanup;
111	}
112
113	/* Mark this parse as a deferred opcode */
114
115	walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP;
116	walk_state->deferred_node = node;
117
118	/* Pass1: Parse the entire declaration */
119
120	status = acpi_ps_parse_aml(walk_state);
121	if (ACPI_FAILURE(status)) {
122	goto cleanup;
123	}
124
125	/* Get and init the Op created above */
126
127	op->common.node = node;
128	acpi_ps_delete_parse_tree(op);
129
130	/* Evaluate the deferred arguments */
131
132	op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
133	if (!op) {
134	return_ACPI_STATUS(AE_NO_MEMORY);
135	}
136
137	op->common.node = scope_node;
138
139	/* Create and initialize a new parser state */
140
141	walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
142	if (!walk_state) {
143	status = AE_NO_MEMORY;
144	goto cleanup;
145	}
146
147	/* Execute the opcode and arguments */
148
149	status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
150	aml_length, NULL, ACPI_IMODE_EXECUTE);
151	if (ACPI_FAILURE(status)) {
152	acpi_ds_delete_walk_state(walk_state);
153	goto cleanup;
154	}
155
156	/* Mark this execution as a deferred opcode */
157
158	walk_state->deferred_node = node;
159	status = acpi_ps_parse_aml(walk_state);
160
161	cleanup:
162	acpi_ps_delete_parse_tree(op);
163	return_ACPI_STATUS(status);
164	}
165
166	/*******************************************************************************
167	*
168	* FUNCTION: acpi_ds_get_buffer_field_arguments
169	*
170	* PARAMETERS: obj_desc - A valid buffer_field object
171	*
172	* RETURN: Status.
173	*
174	* DESCRIPTION: Get buffer_field Buffer and Index. This implements the late
175	* evaluation of these field attributes.
176	*
177	******************************************************************************/
178
179	acpi_status
180	acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc)
181	{
182	union acpi_operand_object *extra_desc;
183	struct acpi_namespace_node *node;
184	acpi_status status;
185
186	ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments, obj_desc);
187
188	if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
189	return_ACPI_STATUS(AE_OK);
190	}
191
192	/* Get the AML pointer (method object) and buffer_field node */
193
194	extra_desc = acpi_ns_get_secondary_object(obj_desc);
195	node = obj_desc->buffer_field.node;
196
197	ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_BUFFER_FIELD,
198	node, NULL));
199
200	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n",
201	acpi_ut_get_node_name(node)));
202
203	/* Execute the AML code for the term_arg arguments */
204
205	status = acpi_ds_execute_arguments(node, node->parent,
206	extra_desc->extra.aml_length,
207	extra_desc->extra.aml_start);
208	return_ACPI_STATUS(status);
209	}
210
211	/*******************************************************************************
212	*
213	* FUNCTION: acpi_ds_get_bank_field_arguments
214	*
215	* PARAMETERS: obj_desc - A valid bank_field object
216	*
217	* RETURN: Status.
218	*
219	* DESCRIPTION: Get bank_field bank_value. This implements the late
220	* evaluation of these field attributes.
221	*
222	******************************************************************************/
223
224	acpi_status
225	acpi_ds_get_bank_field_arguments(union acpi_operand_object *obj_desc)
226	{
227	union acpi_operand_object *extra_desc;
228	struct acpi_namespace_node *node;
229	acpi_status status;
230
231	ACPI_FUNCTION_TRACE_PTR(ds_get_bank_field_arguments, obj_desc);
232
233	if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
234	return_ACPI_STATUS(AE_OK);
235	}
236
237	/* Get the AML pointer (method object) and bank_field node */
238
239	extra_desc = acpi_ns_get_secondary_object(obj_desc);
240	node = obj_desc->bank_field.node;
241
242	ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
243	(ACPI_TYPE_LOCAL_BANK_FIELD, node, NULL));
244
245	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BankField Arg Init\n",
246	acpi_ut_get_node_name(node)));
247
248	/* Execute the AML code for the term_arg arguments */
249
250	status = acpi_ds_execute_arguments(node, node->parent,
251	extra_desc->extra.aml_length,
252	extra_desc->extra.aml_start);
253	return_ACPI_STATUS(status);
254	}
255
256	/*******************************************************************************
257	*
258	* FUNCTION: acpi_ds_get_buffer_arguments
259	*
260	* PARAMETERS: obj_desc - A valid Buffer object
261	*
262	* RETURN: Status.
263	*
264	* DESCRIPTION: Get Buffer length and initializer byte list. This implements
265	* the late evaluation of these attributes.
266	*
267	******************************************************************************/
268
269	acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc)
270	{
271	struct acpi_namespace_node *node;
272	acpi_status status;
273
274	ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments, obj_desc);
275
276	if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
277	return_ACPI_STATUS(AE_OK);
278	}
279
280	/* Get the Buffer node */
281
282	node = obj_desc->buffer.node;
283	if (!node) {
284	ACPI_ERROR((AE_INFO,
285	"No pointer back to namespace node in buffer object %p",
286	obj_desc));
287	return_ACPI_STATUS(AE_AML_INTERNAL);
288	}
289
290	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n"));
291
292	/* Execute the AML code for the term_arg arguments */
293
294	status = acpi_ds_execute_arguments(node, node,
295	obj_desc->buffer.aml_length,
296	obj_desc->buffer.aml_start);
297	return_ACPI_STATUS(status);
298	}
299
300	/*******************************************************************************
301	*
302	* FUNCTION: acpi_ds_get_package_arguments
303	*
304	* PARAMETERS: obj_desc - A valid Package object
305	*
306	* RETURN: Status.
307	*
308	* DESCRIPTION: Get Package length and initializer byte list. This implements
309	* the late evaluation of these attributes.
310	*
311	******************************************************************************/
312
313	acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc)
314	{
315	struct acpi_namespace_node *node;
316	acpi_status status;
317
318	ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments, obj_desc);
319
320	if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
321	return_ACPI_STATUS(AE_OK);
322	}
323
324	/* Get the Package node */
325
326	node = obj_desc->package.node;
327	if (!node) {
328	ACPI_ERROR((AE_INFO,
329	"No pointer back to namespace node in package %p",
330	obj_desc));
331	return_ACPI_STATUS(AE_AML_INTERNAL);
332	}
333
334	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Arg Init\n"));
335
336	/* Execute the AML code for the term_arg arguments */
337
338	status = acpi_ds_execute_arguments(node, node,
339	obj_desc->package.aml_length,
340	obj_desc->package.aml_start);
341	return_ACPI_STATUS(status);
342	}
343
344	/*******************************************************************************
345	*
346	* FUNCTION: acpi_ds_get_region_arguments
347	*
348	* PARAMETERS: obj_desc - A valid region object
349	*
350	* RETURN: Status.
351	*
352	* DESCRIPTION: Get region address and length. This implements the late
353	* evaluation of these region attributes.
354	*
355	******************************************************************************/
356
357	acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc)
358	{
359	struct acpi_namespace_node *node;
360	acpi_status status;
361	union acpi_operand_object *extra_desc;
362
363	ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments, obj_desc);
364
365	if (obj_desc->region.flags & AOPOBJ_DATA_VALID) {
366	return_ACPI_STATUS(AE_OK);
367	}
368
369	extra_desc = acpi_ns_get_secondary_object(obj_desc);
370	if (!extra_desc) {
371	return_ACPI_STATUS(AE_NOT_EXIST);
372	}
373
374	/* Get the Region node */
375
376	node = obj_desc->region.node;
377
378	ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
379	(ACPI_TYPE_REGION, node, NULL));
380
381	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] OpRegion Arg Init at AML %p\n",
382	acpi_ut_get_node_name(node),
383	extra_desc->extra.aml_start));
384
385	/* Execute the argument AML */
386
387	status = acpi_ds_execute_arguments(node, node->parent,
388	extra_desc->extra.aml_length,
389	extra_desc->extra.aml_start);
da4d8b28 LM	390	if (ACPI_FAILURE(status)) {
	391	return_ACPI_STATUS(status);
	392	}
	393
	394	/* Validate the region address/length via the host OS */
	395
	396	status = acpi_os_validate_address(obj_desc->region.space_id,
	397	obj_desc->region.address,
	398	(acpi_size) obj_desc->region.length,
	399	acpi_ut_get_node_name(node));
	400
	401	if (ACPI_FAILURE(status)) {
	402	/*
	403	* Invalid address/length. We will emit an error message and mark
	404	* the region as invalid, so that it will cause an additional error if
	405	* it is ever used. Then return AE_OK.
	406	*/
	407	ACPI_EXCEPTION((AE_INFO, status,
	408	"During address validation of OpRegion [%4.4s]",
	409	node->name.ascii));
	410	obj_desc->common.flags \|= AOPOBJ_INVALID;
	411	status = AE_OK;
	412	}
	413
9ad19ac4 BM	414	return_ACPI_STATUS(status);
9ad19ac4 BM	415	}