patch-2.4.22 linux-2.4.22/drivers/acpi/executer/exfield.c
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- Lines: 724
- Date:
2003-08-25 04:44:41.000000000 -0700
- Orig file:
linux-2.4.21/drivers/acpi/executer/exfield.c
- Orig date:
2001-09-23 09:42:32.000000000 -0700
diff -urN linux-2.4.21/drivers/acpi/executer/exfield.c linux-2.4.22/drivers/acpi/executer/exfield.c
@@ -1,69 +1,85 @@
/******************************************************************************
*
* Module Name: exfield - ACPI AML (p-code) execution - field manipulation
- * $Revision: 95 $
*
*****************************************************************************/
/*
- * Copyright (C) 2000, 2001 R. Byron Moore
+ * Copyright (C) 2000 - 2003, R. Byron Moore
+ * All rights reserved.
*
- * 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
+ * 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.h"
-#include "acdispat.h"
-#include "acinterp.h"
-#include "amlcode.h"
-#include "acnamesp.h"
-#include "achware.h"
-#include "acevents.h"
+#include <acpi/acpi.h>
+#include <acpi/acdispat.h>
+#include <acpi/acinterp.h>
#define _COMPONENT ACPI_EXECUTER
- MODULE_NAME ("exfield")
+ ACPI_MODULE_NAME ("exfield")
/*******************************************************************************
*
- * FUNCTION: Acpi_ex_read_data_from_field
+ * FUNCTION: acpi_ex_read_data_from_field
*
- * PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
- * *Field_node - Parent node for field to be accessed
- * *Buffer - Value(s) to be read or written
- * Buffer_length - Number of bytes to transfer
+ * PARAMETERS: walk_state - Current execution state
+ * obj_desc - The named field
+ * ret_buffer_desc - Where the return data object is stored
*
- * RETURN: Status3
+ * RETURN: Status
*
- * DESCRIPTION: Read or write a named field
+ * DESCRIPTION: Read from a named field. Returns either an Integer or a
+ * Buffer, depending on the size of the field.
*
******************************************************************************/
acpi_status
acpi_ex_read_data_from_field (
- acpi_operand_object *obj_desc,
- acpi_operand_object **ret_buffer_desc)
+ struct acpi_walk_state *walk_state,
+ union acpi_operand_object *obj_desc,
+ union acpi_operand_object **ret_buffer_desc)
{
- acpi_status status;
- acpi_operand_object *buffer_desc;
- u32 length;
- void *buffer;
+ acpi_status status;
+ union acpi_operand_object *buffer_desc;
+ acpi_size length;
+ void *buffer;
+ u8 locked;
- FUNCTION_TRACE_PTR ("Ex_read_data_from_field", obj_desc);
+ ACPI_FUNCTION_TRACE_PTR ("ex_read_data_from_field", obj_desc);
/* Parameter validation */
@@ -72,6 +88,44 @@
return_ACPI_STATUS (AE_AML_NO_OPERAND);
}
+ if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_BUFFER_FIELD) {
+ /*
+ * If the buffer_field arguments have not been previously evaluated,
+ * evaluate them now and save the results.
+ */
+ if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
+ status = acpi_ds_get_buffer_field_arguments (obj_desc);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+ }
+ }
+ else if ((ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_LOCAL_REGION_FIELD) &&
+ (obj_desc->field.region_obj->region.space_id == ACPI_ADR_SPACE_SMBUS)) {
+ /*
+ * This is an SMBus read. We must create a buffer to hold the data
+ * and directly access the region handler.
+ */
+ buffer_desc = acpi_ut_create_buffer_object (ACPI_SMBUS_BUFFER_SIZE);
+ if (!buffer_desc) {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ /* Lock entire transaction if requested */
+
+ locked = acpi_ex_acquire_global_lock (obj_desc->common_field.field_flags);
+
+ /*
+ * Perform the read.
+ * Note: Smbus protocol value is passed in upper 16-bits of Function
+ */
+ status = acpi_ex_access_region (obj_desc, 0,
+ ACPI_CAST_PTR (acpi_integer, buffer_desc->buffer.pointer),
+ ACPI_READ | (obj_desc->field.attribute << 16));
+ acpi_ex_release_global_lock (locked);
+ goto exit;
+ }
+
/*
* Allocate a buffer for the contents of the field.
*
@@ -82,28 +136,16 @@
*
* Note: Field.length is in bits.
*/
- length = ROUND_BITS_UP_TO_BYTES (obj_desc->field.bit_length);
-
- if (length > sizeof (acpi_integer)) {
+ length = (acpi_size) ACPI_ROUND_BITS_UP_TO_BYTES (obj_desc->field.bit_length);
+ if (length > acpi_gbl_integer_byte_width) {
/* Field is too large for an Integer, create a Buffer instead */
- buffer_desc = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER);
+ buffer_desc = acpi_ut_create_buffer_object (length);
if (!buffer_desc) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
-
- /* Create the actual read buffer */
-
- buffer_desc->buffer.pointer = ACPI_MEM_CALLOCATE (length);
- if (!buffer_desc->buffer.pointer) {
- acpi_ut_remove_reference (buffer_desc);
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
-
- buffer_desc->buffer.length = length;
buffer = buffer_desc->buffer.pointer;
}
-
else {
/* Field will fit within an Integer (normal case) */
@@ -112,39 +154,34 @@
return_ACPI_STATUS (AE_NO_MEMORY);
}
- length = sizeof (buffer_desc->integer.value);
+ length = acpi_gbl_integer_byte_width;
+ buffer_desc->integer.value = 0;
buffer = &buffer_desc->integer.value;
}
+ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
+ "Obj=%p Type=%X Buf=%p Len=%X\n",
+ obj_desc, ACPI_GET_OBJECT_TYPE (obj_desc), buffer, (u32) length));
+ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
+ "field_write: bit_len=%X bit_off=%X byte_off=%X\n",
+ obj_desc->common_field.bit_length,
+ obj_desc->common_field.start_field_bit_offset,
+ obj_desc->common_field.base_byte_offset));
- /* Read from the appropriate field */
-
- switch (obj_desc->common.type) {
- case ACPI_TYPE_BUFFER_FIELD:
- status = acpi_ex_access_buffer_field (ACPI_READ, obj_desc, buffer, length);
- break;
-
- case INTERNAL_TYPE_REGION_FIELD:
- status = acpi_ex_access_region_field (ACPI_READ, obj_desc, buffer, length);
- break;
+ /* Lock entire transaction if requested */
- case INTERNAL_TYPE_BANK_FIELD:
- status = acpi_ex_access_bank_field (ACPI_READ, obj_desc, buffer, length);
- break;
+ locked = acpi_ex_acquire_global_lock (obj_desc->common_field.field_flags);
- case INTERNAL_TYPE_INDEX_FIELD:
- status = acpi_ex_access_index_field (ACPI_READ, obj_desc, buffer, length);
- break;
+ /* Read from the field */
- default:
- status = AE_AML_INTERNAL;
- }
+ status = acpi_ex_extract_from_field (obj_desc, buffer, (u32) length);
+ acpi_ex_release_global_lock (locked);
+exit:
if (ACPI_FAILURE (status)) {
acpi_ut_remove_reference (buffer_desc);
}
-
else if (ret_buffer_desc) {
*ret_buffer_desc = buffer_desc;
}
@@ -155,31 +192,33 @@
/*******************************************************************************
*
- * FUNCTION: Acpi_ex_write_data_to_field
+ * FUNCTION: acpi_ex_write_data_to_field
*
- * PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
- * *Field_node - Parent node for field to be accessed
- * *Buffer - Value(s) to be read or written
- * Buffer_length - Number of bytes to transfer
+ * PARAMETERS: source_desc - Contains data to write
+ * obj_desc - The named field
*
* RETURN: Status
*
- * DESCRIPTION: Read or write a named field
+ * DESCRIPTION: Write to a named field
*
******************************************************************************/
-
acpi_status
acpi_ex_write_data_to_field (
- acpi_operand_object *source_desc,
- acpi_operand_object *obj_desc)
+ union acpi_operand_object *source_desc,
+ union acpi_operand_object *obj_desc,
+ union acpi_operand_object **result_desc)
{
- acpi_status status;
- u32 length;
- void *buffer;
+ acpi_status status;
+ u32 length;
+ u32 required_length;
+ void *buffer;
+ void *new_buffer;
+ u8 locked;
+ union acpi_operand_object *buffer_desc;
- FUNCTION_TRACE_PTR ("Ex_write_data_to_field", obj_desc);
+ ACPI_FUNCTION_TRACE_PTR ("ex_write_data_to_field", obj_desc);
/* Parameter validation */
@@ -188,11 +227,67 @@
return_ACPI_STATUS (AE_AML_NO_OPERAND);
}
+ if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_BUFFER_FIELD) {
+ /*
+ * If the buffer_field arguments have not been previously evaluated,
+ * evaluate them now and save the results.
+ */
+ if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
+ status = acpi_ds_get_buffer_field_arguments (obj_desc);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+ }
+ }
+ else if ((ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_LOCAL_REGION_FIELD) &&
+ (obj_desc->field.region_obj->region.space_id == ACPI_ADR_SPACE_SMBUS)) {
+ /*
+ * This is an SMBus write. We will bypass the entire field mechanism
+ * and handoff the buffer directly to the handler.
+ *
+ * Source must be a buffer of sufficient size (ACPI_SMBUS_BUFFER_SIZE).
+ */
+ if (ACPI_GET_OBJECT_TYPE (source_desc) != ACPI_TYPE_BUFFER) {
+ ACPI_REPORT_ERROR (("SMBus write requires Buffer, found type %s\n",
+ acpi_ut_get_object_type_name (source_desc)));
+ return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+ }
+
+ if (source_desc->buffer.length < ACPI_SMBUS_BUFFER_SIZE) {
+ ACPI_REPORT_ERROR (("SMBus write requires Buffer of length %X, found length %X\n",
+ ACPI_SMBUS_BUFFER_SIZE, source_desc->buffer.length));
+ return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
+ }
+
+ buffer_desc = acpi_ut_create_buffer_object (ACPI_SMBUS_BUFFER_SIZE);
+ if (!buffer_desc) {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ buffer = buffer_desc->buffer.pointer;
+ ACPI_MEMCPY (buffer, source_desc->buffer.pointer, ACPI_SMBUS_BUFFER_SIZE);
+
+ /* Lock entire transaction if requested */
+
+ locked = acpi_ex_acquire_global_lock (obj_desc->common_field.field_flags);
+
+ /*
+ * Perform the write (returns status and perhaps data in the same buffer)
+ * Note: SMBus protocol type is passed in upper 16-bits of Function.
+ */
+ status = acpi_ex_access_region (obj_desc, 0,
+ (acpi_integer *) buffer,
+ ACPI_WRITE | (obj_desc->field.attribute << 16));
+ acpi_ex_release_global_lock (locked);
+
+ *result_desc = buffer_desc;
+ return_ACPI_STATUS (status);
+ }
/*
* Get a pointer to the data to be written
*/
- switch (source_desc->common.type) {
+ switch (ACPI_GET_OBJECT_TYPE (source_desc)) {
case ACPI_TYPE_INTEGER:
buffer = &source_desc->integer.value;
length = sizeof (source_desc->integer.value);
@@ -212,315 +307,58 @@
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
-
/*
- * Decode the type of field to be written
+ * We must have a buffer that is at least as long as the field
+ * we are writing to. This is because individual fields are
+ * indivisible and partial writes are not supported -- as per
+ * the ACPI specification.
*/
- switch (obj_desc->common.type) {
- case ACPI_TYPE_BUFFER_FIELD:
- status = acpi_ex_access_buffer_field (ACPI_WRITE, obj_desc, buffer, length);
- break;
-
- case INTERNAL_TYPE_REGION_FIELD:
- status = acpi_ex_access_region_field (ACPI_WRITE, obj_desc, buffer, length);
- break;
-
- case INTERNAL_TYPE_BANK_FIELD:
- status = acpi_ex_access_bank_field (ACPI_WRITE, obj_desc, buffer, length);
- break;
-
- case INTERNAL_TYPE_INDEX_FIELD:
- status = acpi_ex_access_index_field (ACPI_WRITE, obj_desc, buffer, length);
- break;
-
- default:
- return_ACPI_STATUS (AE_AML_INTERNAL);
- }
-
-
- return_ACPI_STATUS (status);
-}
+ new_buffer = NULL;
+ required_length = ACPI_ROUND_BITS_UP_TO_BYTES (obj_desc->common_field.bit_length);
+ if (length < required_length) {
+ /* We need to create a new buffer */
-/*******************************************************************************
- *
- * FUNCTION: Acpi_ex_access_buffer_field
- *
- * PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
- * *Field_node - Parent node for field to be accessed
- * *Buffer - Value(s) to be read or written
- * Buffer_length - Number of bytes to transfer
- *
- * RETURN: Status
- *
- * DESCRIPTION: Read or write a named field
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ex_access_buffer_field (
- u32 mode,
- acpi_operand_object *obj_desc,
- void *buffer,
- u32 buffer_length)
-{
- acpi_status status;
-
-
- FUNCTION_TRACE_PTR ("Ex_access_buffer_field", obj_desc);
-
-
- /*
- * If the Buffer_field arguments have not been previously evaluated,
- * evaluate them now and save the results.
- */
- if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
- status = acpi_ds_get_buffer_field_arguments (obj_desc);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
+ new_buffer = ACPI_MEM_CALLOCATE (required_length);
+ if (!new_buffer) {
+ return_ACPI_STATUS (AE_NO_MEMORY);
}
- }
-
-
- status = acpi_ex_common_access_field (mode, obj_desc, buffer, buffer_length);
-
- return_ACPI_STATUS (status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: Acpi_ex_access_region_field
- *
- * PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
- * *Field_node - Parent node for field to be accessed
- * *Buffer - Value(s) to be read or written
- * Buffer_length - Number of bytes to transfer
- *
- * RETURN: Status
- *
- * DESCRIPTION: Read or write a named field
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ex_access_region_field (
- u32 mode,
- acpi_operand_object *obj_desc,
- void *buffer,
- u32 buffer_length)
-{
- acpi_status status;
- u8 locked;
-
-
- FUNCTION_TRACE_PTR ("Ex_access_region_field", obj_desc);
-
-
- /*
- * Get the global lock if needed
- */
- locked = acpi_ex_acquire_global_lock (obj_desc->field.lock_rule);
-
- status = acpi_ex_common_access_field (mode, obj_desc, buffer, buffer_length);
-
- /*
- * Release global lock if we acquired it earlier
- */
- acpi_ex_release_global_lock (locked);
-
- return_ACPI_STATUS (status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: Acpi_ex_access_bank_field
- *
- * PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
- * *Field_node - Parent node for field to be accessed
- * *Buffer - Value(s) to be read or written
- * Buffer_length - Number of bytes to transfer
- *
- * RETURN: Status
- *
- * DESCRIPTION: Read or write a Bank Field
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ex_access_bank_field (
- u32 mode,
- acpi_operand_object *obj_desc,
- void *buffer,
- u32 buffer_length)
-{
- acpi_status status;
- u8 locked;
-
-
- FUNCTION_TRACE_PTR ("Ex_access_bank_field", obj_desc);
-
-
- /*
- * Get the global lock if needed
- */
- locked = acpi_ex_acquire_global_lock (obj_desc->bank_field.lock_rule);
-
-
- /*
- * Write the Bank_value to the Bank_register to select the bank.
- * The Bank_value for this Bank_field is specified in the
- * Bank_field ASL declaration. The Bank_register is always a Field in
- * an operation region.
- */
- status = acpi_ex_common_access_field (ACPI_WRITE,
- obj_desc->bank_field.bank_register_obj,
- &obj_desc->bank_field.value,
- sizeof (obj_desc->bank_field.value));
- if (ACPI_FAILURE (status)) {
- goto cleanup;
- }
-
- /*
- * The bank was successfully selected, now read or write the actual
- * data.
- */
- status = acpi_ex_common_access_field (mode, obj_desc, buffer, buffer_length);
-
-
-cleanup:
- /*
- * Release global lock if we acquired it earlier
- */
- acpi_ex_release_global_lock (locked);
-
- return_ACPI_STATUS (status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: Acpi_ex_access_index_field
- *
- * PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
- * *Field_node - Parent node for field to be accessed
- * *Buffer - Value(s) to be read or written
- * Buffer_length - Number of bytes to transfer
- *
- * RETURN: Status
- *
- * DESCRIPTION: Read or write a Index Field
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ex_access_index_field (
- u32 mode,
- acpi_operand_object *obj_desc,
- void *buffer,
- u32 buffer_length)
-{
- acpi_status status;
- u8 locked;
-
-
- FUNCTION_TRACE_PTR ("Ex_access_index_field", obj_desc);
-
-
- /*
- * Get the global lock if needed
- */
- locked = acpi_ex_acquire_global_lock (obj_desc->index_field.lock_rule);
-
-
- /*
- * Set Index value to select proper Data register
- */
- status = acpi_ex_common_access_field (ACPI_WRITE,
- obj_desc->index_field.index_obj,
- &obj_desc->index_field.value,
- sizeof (obj_desc->index_field.value));
- if (ACPI_FAILURE (status)) {
- goto cleanup;
- }
-
- /* Now read/write the data register */
-
- status = acpi_ex_common_access_field (mode, obj_desc->index_field.data_obj,
- buffer, buffer_length);
-
-cleanup:
- /*
- * Release global lock if we acquired it earlier
- */
- acpi_ex_release_global_lock (locked);
-
- return_ACPI_STATUS (status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: Acpi_ex_common_access_field
- *
- * PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
- * *Field_node - Parent node for field to be accessed
- * *Buffer - Value(s) to be read or written
- * Buffer_length - Size of buffer, in bytes. Must be large
- * enough for all bits of the field.
- *
- * RETURN: Status
- *
- * DESCRIPTION: Read or write a named field
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ex_common_access_field (
- u32 mode,
- acpi_operand_object *obj_desc,
- void *buffer,
- u32 buffer_length)
-{
- acpi_status status;
-
-
- FUNCTION_TRACE_PTR ("Ex_common_access_field", obj_desc);
-
-
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Obj=%p Type=%X Buf=%p Len=%X\n",
- obj_desc, obj_desc->common.type, buffer, buffer_length));
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode=%d Bit_len=%X Bit_off=%X Byte_off=%X\n",
- mode, obj_desc->common_field.bit_length,
+ /*
+ * Copy the original data to the new buffer, starting
+ * at Byte zero. All unused (upper) bytes of the
+ * buffer will be 0.
+ */
+ ACPI_MEMCPY ((char *) new_buffer, (char *) buffer, length);
+ buffer = new_buffer;
+ length = required_length;
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
+ "Obj=%p Type=%X Buf=%p Len=%X\n",
+ obj_desc, ACPI_GET_OBJECT_TYPE (obj_desc), buffer, length));
+ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
+ "field_read: bit_len=%X bit_off=%X byte_off=%X\n",
+ obj_desc->common_field.bit_length,
obj_desc->common_field.start_field_bit_offset,
obj_desc->common_field.base_byte_offset));
+ /* Lock entire transaction if requested */
- /* Perform the actual read or write of the field */
+ locked = acpi_ex_acquire_global_lock (obj_desc->common_field.field_flags);
- switch (mode) {
- case ACPI_READ:
-
- status = acpi_ex_extract_from_field (obj_desc, buffer, buffer_length);
- break;
-
-
- case ACPI_WRITE:
-
- status = acpi_ex_insert_into_field (obj_desc, buffer, buffer_length);
- break;
+ /* Write to the field */
+ status = acpi_ex_insert_into_field (obj_desc, buffer, length);
+ acpi_ex_release_global_lock (locked);
- default:
+ /* Free temporary buffer if we used one */
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown I/O Mode: %X\n", mode));
- status = AE_BAD_PARAMETER;
- break;
+ if (new_buffer) {
+ ACPI_MEM_FREE (new_buffer);
}
-
return_ACPI_STATUS (status);
}
+
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