1 /******************************************************************************
3 * Module Name: amconfig - Namespace reconfiguration (Load/Unload opcodes)
6 *****************************************************************************/
9 * Copyright (C) 2000, 2001 R. Byron Moore
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
37 #define _COMPONENT ACPI_EXECUTER
38 MODULE_NAME ("amconfig")
41 /*****************************************************************************
43 * FUNCTION: Acpi_aml_exec_load_table
45 * PARAMETERS: Rgn_desc - Op region where the table will be obtained
46 * Ddb_handle - Where a handle to the table will be returned
50 * DESCRIPTION: Load an ACPI table
52 ****************************************************************************/
55 acpi_aml_exec_load_table (
56 ACPI_OPERAND_OBJECT
*rgn_desc
,
57 ACPI_HANDLE
*ddb_handle
)
60 ACPI_OPERAND_OBJECT
*table_desc
= NULL
;
63 ACPI_TABLE_HEADER table_header
;
64 ACPI_TABLE_DESC table_info
;
68 /* TBD: [Unhandled] Object can be either a field or an opregion */
71 /* Get the table header */
73 table_header
.length
= 0;
74 for (i
= 0; i
< sizeof (ACPI_TABLE_HEADER
); i
++) {
75 status
= acpi_ev_address_space_dispatch (rgn_desc
, ADDRESS_SPACE_READ
,
76 (ACPI_PHYSICAL_ADDRESS
) i
, 8,
77 (u32
*) ((u8
*) &table_header
+ i
));
78 if (ACPI_FAILURE (status
)) {
83 /* Allocate a buffer for the entire table */
85 table_ptr
= acpi_cm_allocate (table_header
.length
);
87 return (AE_NO_MEMORY
);
90 /* Copy the header to the buffer */
92 MEMCPY (table_ptr
, &table_header
, sizeof (ACPI_TABLE_HEADER
));
93 table_data_ptr
= table_ptr
+ sizeof (ACPI_TABLE_HEADER
);
96 /* Get the table from the op region */
98 for (i
= 0; i
< table_header
.length
; i
++) {
99 status
= acpi_ev_address_space_dispatch (rgn_desc
, ADDRESS_SPACE_READ
,
100 (ACPI_PHYSICAL_ADDRESS
)i
, 8,
101 (u32
*) (table_data_ptr
+ i
));
102 if (ACPI_FAILURE (status
)) {
108 /* Table must be either an SSDT or a PSDT */
110 if ((!STRNCMP (table_header
.signature
,
111 acpi_gbl_acpi_table_data
[ACPI_TABLE_PSDT
].signature
,
112 acpi_gbl_acpi_table_data
[ACPI_TABLE_PSDT
].sig_length
)) &&
113 (!STRNCMP (table_header
.signature
,
114 acpi_gbl_acpi_table_data
[ACPI_TABLE_SSDT
].signature
,
115 acpi_gbl_acpi_table_data
[ACPI_TABLE_SSDT
].sig_length
))) {
116 status
= AE_BAD_SIGNATURE
;
120 /* Create an object to be the table handle */
122 table_desc
= acpi_cm_create_internal_object (INTERNAL_TYPE_REFERENCE
);
124 status
= AE_NO_MEMORY
;
129 /* Install the new table into the local data structures */
131 table_info
.pointer
= (ACPI_TABLE_HEADER
*) table_ptr
;
132 table_info
.length
= table_header
.length
;
133 table_info
.allocation
= ACPI_MEM_ALLOCATED
;
134 table_info
.base_pointer
= table_ptr
;
136 status
= acpi_tb_install_table (NULL
, &table_info
);
137 if (ACPI_FAILURE (status
)) {
141 /* Add the table to the namespace */
143 /* TBD: [Restructure] - change to whatever new interface is appropriate */
145 Status = Acpi_load_namespace ();
146 if (ACPI_FAILURE (Status))
149 /* TBD: [Errors] Unload the table on failure ? */
156 /* TBD: [Investigate] we need a pointer to the table desc */
158 /* Init the table handle */
160 table_desc
->reference
.opcode
= AML_LOAD_OP
;
161 table_desc
->reference
.object
= table_info
.installed_desc
;
163 *ddb_handle
= table_desc
;
170 acpi_cm_free (table_desc
);
171 acpi_cm_free (table_ptr
);
177 /*****************************************************************************
179 * FUNCTION: Acpi_aml_exec_unload_table
181 * PARAMETERS: Ddb_handle - Handle to a previously loaded table
185 * DESCRIPTION: Unload an ACPI table
187 ****************************************************************************/
190 acpi_aml_exec_unload_table (
191 ACPI_HANDLE ddb_handle
)
193 ACPI_STATUS status
= AE_NOT_IMPLEMENTED
;
194 ACPI_OPERAND_OBJECT
*table_desc
= (ACPI_OPERAND_OBJECT
*) ddb_handle
;
195 ACPI_TABLE_DESC
*table_info
;
198 /* Validate the handle */
199 /* Although the handle is partially validated in Acpi_aml_exec_reconfiguration(),
200 * when it calls Acpi_aml_resolve_operands(), the handle is more completely
205 (!VALID_DESCRIPTOR_TYPE (ddb_handle
, ACPI_DESC_TYPE_INTERNAL
)) ||
206 (((ACPI_OPERAND_OBJECT
*)ddb_handle
)->common
.type
!=
207 INTERNAL_TYPE_REFERENCE
)) {
208 return (AE_BAD_PARAMETER
);
212 /* Get the actual table descriptor from the Ddb_handle */
214 table_info
= (ACPI_TABLE_DESC
*) table_desc
->reference
.object
;
217 * Delete the entire namespace under this table Node
218 * (Offset contains the Table_id)
221 status
= acpi_ns_delete_namespace_by_owner (table_info
->table_id
);
222 if (ACPI_FAILURE (status
)) {
226 /* Delete the table itself */
228 acpi_tb_uninstall_table (table_info
->installed_desc
);
230 /* Delete the table descriptor (Ddb_handle) */
232 acpi_cm_remove_reference (table_desc
);
238 /*****************************************************************************
240 * FUNCTION: Acpi_aml_exec_reconfiguration
242 * PARAMETERS: Opcode - The opcode to be executed
243 * Walk_state - Current state of the parse tree walk
247 * DESCRIPTION: Reconfiguration opcodes such as LOAD and UNLOAD
249 ****************************************************************************/
252 acpi_aml_exec_reconfiguration (
254 ACPI_WALK_STATE
*walk_state
)
257 ACPI_OPERAND_OBJECT
*region_desc
= NULL
;
258 ACPI_HANDLE
*ddb_handle
;
261 /* Resolve the operands */
263 status
= acpi_aml_resolve_operands (opcode
, WALK_OPERANDS
, walk_state
);
264 /* Get the table handle, common for both opcodes */
266 status
|= acpi_ds_obj_stack_pop_object ((ACPI_OPERAND_OBJECT
**) &ddb_handle
,
273 /* Get the region or field descriptor */
275 status
|= acpi_ds_obj_stack_pop_object (®ion_desc
, walk_state
);
276 if (ACPI_FAILURE (status
)) {
277 acpi_cm_remove_reference (region_desc
);
281 status
= acpi_aml_exec_load_table (region_desc
, ddb_handle
);
287 if (ACPI_FAILURE (status
)) {
291 status
= acpi_aml_exec_unload_table (ddb_handle
);
297 status
= AE_AML_BAD_OPCODE
;