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/******************************************************************************
*
* Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes)
* $Revision: 44 $
*
*****************************************************************************/
/*
* 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 "actables.h"
#include "acdispat.h"
#define _COMPONENT ACPI_EXECUTER
MODULE_NAME ("exconfig")
/*****************************************************************************
*
* FUNCTION: Acpi_ex_load_table_op
*
* PARAMETERS: Rgn_desc - Op region where the table will be obtained
* Ddb_handle - Where a handle to the table will be returned
*
* RETURN: Status
*
* DESCRIPTION: Load an ACPI table
*
****************************************************************************/
acpi_status
acpi_ex_load_op (
acpi_operand_object *rgn_desc,
acpi_operand_object *ddb_handle)
{
acpi_status status;
acpi_operand_object *table_desc = NULL;
u8 *table_ptr;
u8 *table_data_ptr;
acpi_table_header table_header;
acpi_table_desc table_info;
u32 i;
FUNCTION_TRACE ("Ex_load_op");
/* TBD: [Unhandled] Object can be either a field or an opregion */
/* Get the table header */
table_header.length = 0;
for (i = 0; i < sizeof (acpi_table_header); i++) {
status = acpi_ev_address_space_dispatch (rgn_desc, ACPI_READ_ADR_SPACE,
(ACPI_PHYSICAL_ADDRESS) i, 8,
(u32 *) ((u8 *) &table_header + i));
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
/* Allocate a buffer for the entire table */
table_ptr = ACPI_MEM_ALLOCATE (table_header.length);
if (!table_ptr) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Copy the header to the buffer */
MEMCPY (table_ptr, &table_header, sizeof (acpi_table_header));
table_data_ptr = table_ptr + sizeof (acpi_table_header);
/* Get the table from the op region */
for (i = 0; i < table_header.length; i++) {
status = acpi_ev_address_space_dispatch (rgn_desc, ACPI_READ_ADR_SPACE,
(ACPI_PHYSICAL_ADDRESS) i, 8,
(u32 *) (table_data_ptr + i));
if (ACPI_FAILURE (status)) {
goto cleanup;
}
}
/* Table must be either an SSDT or a PSDT */
if ((!STRNCMP (table_header.signature,
acpi_gbl_acpi_table_data[ACPI_TABLE_PSDT].signature,
acpi_gbl_acpi_table_data[ACPI_TABLE_PSDT].sig_length)) &&
(!STRNCMP (table_header.signature,
acpi_gbl_acpi_table_data[ACPI_TABLE_SSDT].signature,
acpi_gbl_acpi_table_data[ACPI_TABLE_SSDT].sig_length))) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Table has invalid signature [%4.4s], must be SSDT or PSDT\n",
(char*)table_header.signature));
status = AE_BAD_SIGNATURE;
goto cleanup;
}
/* Create an object to be the table handle */
table_desc = acpi_ut_create_internal_object (INTERNAL_TYPE_REFERENCE);
if (!table_desc) {
status = AE_NO_MEMORY;
goto cleanup;
}
/* Install the new table into the local data structures */
table_info.pointer = (acpi_table_header *) table_ptr;
table_info.length = table_header.length;
table_info.allocation = ACPI_MEM_ALLOCATED;
table_info.base_pointer = table_ptr;
status = acpi_tb_install_table (NULL, &table_info);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
/* Add the table to the namespace */
/* TBD: [Restructure] - change to whatever new interface is appropriate */
/*
Status = Acpi_load_namespace ();
if (ACPI_FAILURE (Status))
{
*/
/* TBD: [Errors] Unload the table on failure ? */
/*
goto Cleanup;
}
*/
/* TBD: [Investigate] we need a pointer to the table desc */
/* Init the table handle */
table_desc->reference.opcode = AML_LOAD_OP;
table_desc->reference.object = table_info.installed_desc;
/* TBD: store the tabledesc into the Ddb_handle target */
/* Ddb_handle = Table_desc; */
return_ACPI_STATUS (status);
cleanup:
ACPI_MEM_FREE (table_desc);
ACPI_MEM_FREE (table_ptr);
return_ACPI_STATUS (status);
}
/*****************************************************************************
*
* FUNCTION: Acpi_ex_unload_table
*
* PARAMETERS: Ddb_handle - Handle to a previously loaded table
*
* RETURN: Status
*
* DESCRIPTION: Unload an ACPI table
*
****************************************************************************/
acpi_status
acpi_ex_unload_table (
acpi_operand_object *ddb_handle)
{
acpi_status status = AE_NOT_IMPLEMENTED;
acpi_operand_object *table_desc = ddb_handle;
acpi_table_desc *table_info;
FUNCTION_TRACE ("Ex_unload_table");
/*
* Validate the handle
* Although the handle is partially validated in Acpi_ex_reconfiguration(),
* when it calls Acpi_ex_resolve_operands(), the handle is more completely
* validated here.
*/
if ((!ddb_handle) ||
(!VALID_DESCRIPTOR_TYPE (ddb_handle, ACPI_DESC_TYPE_INTERNAL)) ||
(((acpi_operand_object *)ddb_handle)->common.type !=
INTERNAL_TYPE_REFERENCE)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Get the actual table descriptor from the Ddb_handle */
table_info = (acpi_table_desc *) table_desc->reference.object;
/*
* Delete the entire namespace under this table Node
* (Offset contains the Table_id)
*/
status = acpi_ns_delete_namespace_by_owner (table_info->table_id);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Delete the table itself */
acpi_tb_uninstall_table (table_info->installed_desc);
/* Delete the table descriptor (Ddb_handle) */
acpi_ut_remove_reference (table_desc);
return_ACPI_STATUS (status);
}
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