diff options
Diffstat (limited to 'drivers/acpi')
-rw-r--r-- | drivers/acpi/parser/psloop.c | 1406 |
1 files changed, 783 insertions, 623 deletions
diff --git a/drivers/acpi/parser/psloop.c b/drivers/acpi/parser/psloop.c index e1541db3753a..a83be5201856 100644 --- a/drivers/acpi/parser/psloop.c +++ b/drivers/acpi/parser/psloop.c | |||
@@ -42,12 +42,11 @@ | |||
42 | */ | 42 | */ |
43 | 43 | ||
44 | /* | 44 | /* |
45 | * Parse the AML and build an operation tree as most interpreters, | 45 | * Parse the AML and build an operation tree as most interpreters, (such as |
46 | * like Perl, do. Parsing is done by hand rather than with a YACC | 46 | * Perl) do. Parsing is done by hand rather than with a YACC generated parser |
47 | * generated parser to tightly constrain stack and dynamic memory | 47 | * to tightly constrain stack and dynamic memory usage. Parsing is kept |
48 | * usage. At the same time, parsing is kept flexible and the code | 48 | * flexible and the code fairly compact by parsing based on a list of AML |
49 | * fairly compact by parsing based on a list of AML opcode | 49 | * opcode templates in aml_op_info[]. |
50 | * templates in aml_op_info[] | ||
51 | */ | 50 | */ |
52 | 51 | ||
53 | #include <acpi/acpi.h> | 52 | #include <acpi/acpi.h> |
@@ -60,766 +59,679 @@ ACPI_MODULE_NAME("psloop") | |||
60 | 59 | ||
61 | static u32 acpi_gbl_depth = 0; | 60 | static u32 acpi_gbl_depth = 0; |
62 | 61 | ||
62 | /* Local prototypes */ | ||
63 | |||
64 | static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state); | ||
65 | |||
66 | static acpi_status | ||
67 | acpi_ps_build_named_op(struct acpi_walk_state *walk_state, | ||
68 | u8 * aml_op_start, | ||
69 | union acpi_parse_object *unnamed_op, | ||
70 | union acpi_parse_object **op); | ||
71 | |||
72 | static acpi_status | ||
73 | acpi_ps_create_op(struct acpi_walk_state *walk_state, | ||
74 | u8 * aml_op_start, union acpi_parse_object **new_op); | ||
75 | |||
76 | static acpi_status | ||
77 | acpi_ps_get_arguments(struct acpi_walk_state *walk_state, | ||
78 | u8 * aml_op_start, union acpi_parse_object *op); | ||
79 | |||
80 | static acpi_status | ||
81 | acpi_ps_complete_op(struct acpi_walk_state *walk_state, | ||
82 | union acpi_parse_object **op, acpi_status status); | ||
83 | |||
84 | static acpi_status | ||
85 | acpi_ps_complete_final_op(struct acpi_walk_state *walk_state, | ||
86 | union acpi_parse_object *op, acpi_status status); | ||
87 | |||
63 | /******************************************************************************* | 88 | /******************************************************************************* |
64 | * | 89 | * |
65 | * FUNCTION: acpi_ps_parse_loop | 90 | * FUNCTION: acpi_ps_get_aml_opcode |
66 | * | 91 | * |
67 | * PARAMETERS: walk_state - Current state | 92 | * PARAMETERS: walk_state - Current state |
68 | * | 93 | * |
69 | * RETURN: Status | 94 | * RETURN: Status |
70 | * | 95 | * |
71 | * DESCRIPTION: Parse AML (pointed to by the current parser state) and return | 96 | * DESCRIPTION: Extract the next AML opcode from the input stream. |
72 | * a tree of ops. | ||
73 | * | 97 | * |
74 | ******************************************************************************/ | 98 | ******************************************************************************/ |
75 | 99 | ||
76 | acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) | 100 | static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state) |
77 | { | 101 | { |
78 | acpi_status status = AE_OK; | ||
79 | acpi_status status2; | ||
80 | union acpi_parse_object *op = NULL; /* current op */ | ||
81 | union acpi_parse_object *arg = NULL; | ||
82 | union acpi_parse_object *pre_op = NULL; | ||
83 | struct acpi_parse_state *parser_state; | ||
84 | u8 *aml_op_start = NULL; | ||
85 | 102 | ||
86 | ACPI_FUNCTION_TRACE_PTR(ps_parse_loop, walk_state); | 103 | ACPI_FUNCTION_TRACE_PTR(ps_get_aml_opcode, walk_state); |
87 | 104 | ||
88 | if (walk_state->descending_callback == NULL) { | 105 | walk_state->aml_offset = |
89 | return_ACPI_STATUS(AE_BAD_PARAMETER); | 106 | (u32) ACPI_PTR_DIFF(walk_state->parser_state.aml, |
90 | } | 107 | walk_state->parser_state.aml_start); |
108 | walk_state->opcode = acpi_ps_peek_opcode(&(walk_state->parser_state)); | ||
91 | 109 | ||
92 | parser_state = &walk_state->parser_state; | 110 | /* |
93 | walk_state->arg_types = 0; | 111 | * First cut to determine what we have found: |
112 | * 1) A valid AML opcode | ||
113 | * 2) A name string | ||
114 | * 3) An unknown/invalid opcode | ||
115 | */ | ||
116 | walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode); | ||
94 | 117 | ||
95 | #if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) | 118 | switch (walk_state->op_info->class) { |
119 | case AML_CLASS_ASCII: | ||
120 | case AML_CLASS_PREFIX: | ||
121 | /* | ||
122 | * Starts with a valid prefix or ASCII char, this is a name | ||
123 | * string. Convert the bare name string to a namepath. | ||
124 | */ | ||
125 | walk_state->opcode = AML_INT_NAMEPATH_OP; | ||
126 | walk_state->arg_types = ARGP_NAMESTRING; | ||
127 | break; | ||
96 | 128 | ||
97 | if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) { | 129 | case AML_CLASS_UNKNOWN: |
98 | 130 | ||
99 | /* We are restarting a preempted control method */ | 131 | /* The opcode is unrecognized. Just skip unknown opcodes */ |
100 | 132 | ||
101 | if (acpi_ps_has_completed_scope(parser_state)) { | 133 | ACPI_ERROR((AE_INFO, |
102 | /* | 134 | "Found unknown opcode %X at AML address %p offset %X, ignoring", |
103 | * We must check if a predicate to an IF or WHILE statement | 135 | walk_state->opcode, walk_state->parser_state.aml, |
104 | * was just completed | 136 | walk_state->aml_offset)); |
105 | */ | ||
106 | if ((parser_state->scope->parse_scope.op) && | ||
107 | ((parser_state->scope->parse_scope.op->common. | ||
108 | aml_opcode == AML_IF_OP) | ||
109 | || (parser_state->scope->parse_scope.op->common. | ||
110 | aml_opcode == AML_WHILE_OP)) | ||
111 | && (walk_state->control_state) | ||
112 | && (walk_state->control_state->common.state == | ||
113 | ACPI_CONTROL_PREDICATE_EXECUTING)) { | ||
114 | /* | ||
115 | * A predicate was just completed, get the value of the | ||
116 | * predicate and branch based on that value | ||
117 | */ | ||
118 | walk_state->op = NULL; | ||
119 | status = | ||
120 | acpi_ds_get_predicate_value(walk_state, | ||
121 | ACPI_TO_POINTER | ||
122 | (TRUE)); | ||
123 | if (ACPI_FAILURE(status) | ||
124 | && ((status & AE_CODE_MASK) != | ||
125 | AE_CODE_CONTROL)) { | ||
126 | if (status == AE_AML_NO_RETURN_VALUE) { | ||
127 | ACPI_EXCEPTION((AE_INFO, status, | ||
128 | "Invoked method did not return a value")); | ||
129 | 137 | ||
130 | } | 138 | ACPI_DUMP_BUFFER(walk_state->parser_state.aml, 128); |
131 | ACPI_EXCEPTION((AE_INFO, status, | ||
132 | "GetPredicate Failed")); | ||
133 | return_ACPI_STATUS(status); | ||
134 | } | ||
135 | 139 | ||
136 | status = | 140 | /* Assume one-byte bad opcode */ |
137 | acpi_ps_next_parse_state(walk_state, op, | ||
138 | status); | ||
139 | } | ||
140 | 141 | ||
141 | acpi_ps_pop_scope(parser_state, &op, | 142 | walk_state->parser_state.aml++; |
142 | &walk_state->arg_types, | 143 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); |
143 | &walk_state->arg_count); | ||
144 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | ||
145 | "Popped scope, Op=%p\n", op)); | ||
146 | } else if (walk_state->prev_op) { | ||
147 | 144 | ||
148 | /* We were in the middle of an op */ | 145 | default: |
149 | 146 | ||
150 | op = walk_state->prev_op; | 147 | /* Found opcode info, this is a normal opcode */ |
151 | walk_state->arg_types = walk_state->prev_arg_types; | 148 | |
152 | } | 149 | walk_state->parser_state.aml += |
150 | acpi_ps_get_opcode_size(walk_state->opcode); | ||
151 | walk_state->arg_types = walk_state->op_info->parse_args; | ||
152 | break; | ||
153 | } | 153 | } |
154 | #endif | ||
155 | 154 | ||
156 | /* Iterative parsing loop, while there is more AML to process: */ | 155 | return_ACPI_STATUS(AE_OK); |
156 | } | ||
157 | 157 | ||
158 | while ((parser_state->aml < parser_state->aml_end) || (op)) { | 158 | /******************************************************************************* |
159 | aml_op_start = parser_state->aml; | 159 | * |
160 | if (!op) { | 160 | * FUNCTION: acpi_ps_build_named_op |
161 | * | ||
162 | * PARAMETERS: walk_state - Current state | ||
163 | * aml_op_start - Begin of named Op in AML | ||
164 | * unnamed_op - Early Op (not a named Op) | ||
165 | * Op - Returned Op | ||
166 | * | ||
167 | * RETURN: Status | ||
168 | * | ||
169 | * DESCRIPTION: Parse a named Op | ||
170 | * | ||
171 | ******************************************************************************/ | ||
161 | 172 | ||
162 | /* Get the next opcode from the AML stream */ | 173 | static acpi_status |
174 | acpi_ps_build_named_op(struct acpi_walk_state *walk_state, | ||
175 | u8 * aml_op_start, | ||
176 | union acpi_parse_object *unnamed_op, | ||
177 | union acpi_parse_object **op) | ||
178 | { | ||
179 | acpi_status status = AE_OK; | ||
180 | union acpi_parse_object *arg = NULL; | ||
163 | 181 | ||
164 | walk_state->aml_offset = | 182 | ACPI_FUNCTION_TRACE_PTR(ps_build_named_op, walk_state); |
165 | (u32) ACPI_PTR_DIFF(parser_state->aml, | ||
166 | parser_state->aml_start); | ||
167 | walk_state->opcode = acpi_ps_peek_opcode(parser_state); | ||
168 | 183 | ||
169 | /* | 184 | unnamed_op->common.value.arg = NULL; |
170 | * First cut to determine what we have found: | 185 | unnamed_op->common.aml_opcode = walk_state->opcode; |
171 | * 1) A valid AML opcode | ||
172 | * 2) A name string | ||
173 | * 3) An unknown/invalid opcode | ||
174 | */ | ||
175 | walk_state->op_info = | ||
176 | acpi_ps_get_opcode_info(walk_state->opcode); | ||
177 | switch (walk_state->op_info->class) { | ||
178 | case AML_CLASS_ASCII: | ||
179 | case AML_CLASS_PREFIX: | ||
180 | /* | ||
181 | * Starts with a valid prefix or ASCII char, this is a name | ||
182 | * string. Convert the bare name string to a namepath. | ||
183 | */ | ||
184 | walk_state->opcode = AML_INT_NAMEPATH_OP; | ||
185 | walk_state->arg_types = ARGP_NAMESTRING; | ||
186 | break; | ||
187 | 186 | ||
188 | case AML_CLASS_UNKNOWN: | 187 | /* |
188 | * Get and append arguments until we find the node that contains | ||
189 | * the name (the type ARGP_NAME). | ||
190 | */ | ||
191 | while (GET_CURRENT_ARG_TYPE(walk_state->arg_types) && | ||
192 | (GET_CURRENT_ARG_TYPE(walk_state->arg_types) != ARGP_NAME)) { | ||
193 | status = | ||
194 | acpi_ps_get_next_arg(walk_state, | ||
195 | &(walk_state->parser_state), | ||
196 | GET_CURRENT_ARG_TYPE(walk_state-> | ||
197 | arg_types), &arg); | ||
198 | if (ACPI_FAILURE(status)) { | ||
199 | return_ACPI_STATUS(status); | ||
200 | } | ||
189 | 201 | ||
190 | /* The opcode is unrecognized. Just skip unknown opcodes */ | 202 | acpi_ps_append_arg(unnamed_op, arg); |
203 | INCREMENT_ARG_LIST(walk_state->arg_types); | ||
204 | } | ||
191 | 205 | ||
192 | ACPI_ERROR((AE_INFO, | 206 | /* |
193 | "Found unknown opcode %X at AML address %p offset %X, ignoring", | 207 | * Make sure that we found a NAME and didn't run out of arguments |
194 | walk_state->opcode, | 208 | */ |
195 | parser_state->aml, | 209 | if (!GET_CURRENT_ARG_TYPE(walk_state->arg_types)) { |
196 | walk_state->aml_offset)); | 210 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
211 | } | ||
197 | 212 | ||
198 | ACPI_DUMP_BUFFER(parser_state->aml, 128); | 213 | /* We know that this arg is a name, move to next arg */ |
199 | 214 | ||
200 | /* Assume one-byte bad opcode */ | 215 | INCREMENT_ARG_LIST(walk_state->arg_types); |
201 | 216 | ||
202 | parser_state->aml++; | 217 | /* |
203 | continue; | 218 | * Find the object. This will either insert the object into |
219 | * the namespace or simply look it up | ||
220 | */ | ||
221 | walk_state->op = NULL; | ||
204 | 222 | ||
205 | default: | 223 | status = walk_state->descending_callback(walk_state, op); |
224 | if (ACPI_FAILURE(status)) { | ||
225 | ACPI_EXCEPTION((AE_INFO, status, "During name lookup/catalog")); | ||
226 | return_ACPI_STATUS(status); | ||
227 | } | ||
206 | 228 | ||
207 | /* Found opcode info, this is a normal opcode */ | 229 | if (!op) { |
230 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); | ||
231 | } | ||
208 | 232 | ||
209 | parser_state->aml += | 233 | status = acpi_ps_next_parse_state(walk_state, *op, status); |
210 | acpi_ps_get_opcode_size(walk_state->opcode); | 234 | if (ACPI_FAILURE(status)) { |
211 | walk_state->arg_types = | 235 | if (status == AE_CTRL_PENDING) { |
212 | walk_state->op_info->parse_args; | 236 | return_ACPI_STATUS(AE_CTRL_PARSE_PENDING); |
213 | break; | 237 | } |
214 | } | 238 | return_ACPI_STATUS(status); |
239 | } | ||
215 | 240 | ||
216 | /* Create Op structure and append to parent's argument list */ | 241 | acpi_ps_append_arg(*op, unnamed_op->common.value.arg); |
242 | acpi_gbl_depth++; | ||
217 | 243 | ||
218 | if (walk_state->op_info->flags & AML_NAMED) { | 244 | if ((*op)->common.aml_opcode == AML_REGION_OP) { |
245 | /* | ||
246 | * Defer final parsing of an operation_region body, because we don't | ||
247 | * have enough info in the first pass to parse it correctly (i.e., | ||
248 | * there may be method calls within the term_arg elements of the body.) | ||
249 | * | ||
250 | * However, we must continue parsing because the opregion is not a | ||
251 | * standalone package -- we don't know where the end is at this point. | ||
252 | * | ||
253 | * (Length is unknown until parse of the body complete) | ||
254 | */ | ||
255 | (*op)->named.data = aml_op_start; | ||
256 | (*op)->named.length = 0; | ||
257 | } | ||
219 | 258 | ||
220 | /* Allocate a new pre_op if necessary */ | 259 | return_ACPI_STATUS(AE_OK); |
260 | } | ||
221 | 261 | ||
222 | if (!pre_op) { | 262 | /******************************************************************************* |
223 | pre_op = | 263 | * |
224 | acpi_ps_alloc_op(walk_state-> | 264 | * FUNCTION: acpi_ps_create_op |
225 | opcode); | 265 | * |
226 | if (!pre_op) { | 266 | * PARAMETERS: walk_state - Current state |
227 | status = AE_NO_MEMORY; | 267 | * aml_op_start - Op start in AML |
228 | goto close_this_op; | 268 | * new_op - Returned Op |
229 | } | 269 | * |
230 | } | 270 | * RETURN: Status |
271 | * | ||
272 | * DESCRIPTION: Get Op from AML | ||
273 | * | ||
274 | ******************************************************************************/ | ||
231 | 275 | ||
232 | pre_op->common.value.arg = NULL; | 276 | static acpi_status |
233 | pre_op->common.aml_opcode = walk_state->opcode; | 277 | acpi_ps_create_op(struct acpi_walk_state *walk_state, |
278 | u8 * aml_op_start, union acpi_parse_object **new_op) | ||
279 | { | ||
280 | acpi_status status = AE_OK; | ||
281 | union acpi_parse_object *op; | ||
282 | union acpi_parse_object *named_op = NULL; | ||
234 | 283 | ||
235 | /* | 284 | ACPI_FUNCTION_TRACE_PTR(ps_create_op, walk_state); |
236 | * Get and append arguments until we find the node that contains | ||
237 | * the name (the type ARGP_NAME). | ||
238 | */ | ||
239 | while (GET_CURRENT_ARG_TYPE | ||
240 | (walk_state->arg_types) | ||
241 | && | ||
242 | (GET_CURRENT_ARG_TYPE | ||
243 | (walk_state->arg_types) != ARGP_NAME)) { | ||
244 | status = | ||
245 | acpi_ps_get_next_arg(walk_state, | ||
246 | parser_state, | ||
247 | GET_CURRENT_ARG_TYPE | ||
248 | (walk_state-> | ||
249 | arg_types), | ||
250 | &arg); | ||
251 | if (ACPI_FAILURE(status)) { | ||
252 | goto close_this_op; | ||
253 | } | ||
254 | 285 | ||
255 | acpi_ps_append_arg(pre_op, arg); | 286 | status = acpi_ps_get_aml_opcode(walk_state); |
256 | INCREMENT_ARG_LIST(walk_state-> | 287 | if (status == AE_CTRL_PARSE_CONTINUE) { |
257 | arg_types); | 288 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); |
258 | } | 289 | } |
259 | 290 | ||
260 | /* | 291 | /* Create Op structure and append to parent's argument list */ |
261 | * Make sure that we found a NAME and didn't run out of | ||
262 | * arguments | ||
263 | */ | ||
264 | if (!GET_CURRENT_ARG_TYPE | ||
265 | (walk_state->arg_types)) { | ||
266 | status = AE_AML_NO_OPERAND; | ||
267 | goto close_this_op; | ||
268 | } | ||
269 | 292 | ||
270 | /* We know that this arg is a name, move to next arg */ | 293 | walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode); |
294 | op = acpi_ps_alloc_op(walk_state->opcode); | ||
295 | if (!op) { | ||
296 | return_ACPI_STATUS(AE_NO_MEMORY); | ||
297 | } | ||
271 | 298 | ||
272 | INCREMENT_ARG_LIST(walk_state->arg_types); | 299 | if (walk_state->op_info->flags & AML_NAMED) { |
300 | status = | ||
301 | acpi_ps_build_named_op(walk_state, aml_op_start, op, | ||
302 | &named_op); | ||
303 | acpi_ps_free_op(op); | ||
304 | if (ACPI_FAILURE(status)) { | ||
305 | return_ACPI_STATUS(status); | ||
306 | } | ||
273 | 307 | ||
274 | /* | 308 | *new_op = named_op; |
275 | * Find the object. This will either insert the object into | 309 | return_ACPI_STATUS(AE_OK); |
276 | * the namespace or simply look it up | 310 | } |
277 | */ | ||
278 | walk_state->op = NULL; | ||
279 | 311 | ||
280 | status = | 312 | /* Not a named opcode, just allocate Op and append to parent */ |
281 | walk_state->descending_callback(walk_state, | ||
282 | &op); | ||
283 | if (ACPI_FAILURE(status)) { | ||
284 | ACPI_EXCEPTION((AE_INFO, status, | ||
285 | "During name lookup/catalog")); | ||
286 | goto close_this_op; | ||
287 | } | ||
288 | 313 | ||
289 | if (!op) { | 314 | if (walk_state->op_info->flags & AML_CREATE) { |
290 | continue; | 315 | /* |
291 | } | 316 | * Backup to beginning of create_xXXfield declaration |
317 | * body_length is unknown until we parse the body | ||
318 | */ | ||
319 | op->named.data = aml_op_start; | ||
320 | op->named.length = 0; | ||
321 | } | ||
292 | 322 | ||
293 | status = | 323 | acpi_ps_append_arg(acpi_ps_get_parent_scope |
294 | acpi_ps_next_parse_state(walk_state, op, | 324 | (&(walk_state->parser_state)), op); |
295 | status); | ||
296 | if (status == AE_CTRL_PENDING) { | ||
297 | status = AE_OK; | ||
298 | goto close_this_op; | ||
299 | } | ||
300 | 325 | ||
301 | if (ACPI_FAILURE(status)) { | 326 | if (walk_state->descending_callback != NULL) { |
302 | goto close_this_op; | 327 | /* |
303 | } | 328 | * Find the object. This will either insert the object into |
329 | * the namespace or simply look it up | ||
330 | */ | ||
331 | walk_state->op = *new_op = op; | ||
304 | 332 | ||
305 | acpi_ps_append_arg(op, | 333 | status = walk_state->descending_callback(walk_state, &op); |
306 | pre_op->common.value.arg); | 334 | status = acpi_ps_next_parse_state(walk_state, op, status); |
307 | acpi_gbl_depth++; | 335 | if (status == AE_CTRL_PENDING) { |
308 | 336 | status = AE_CTRL_PARSE_PENDING; | |
309 | if (op->common.aml_opcode == AML_REGION_OP) { | 337 | } |
310 | /* | 338 | } |
311 | * Defer final parsing of an operation_region body, | ||
312 | * because we don't have enough info in the first pass | ||
313 | * to parse it correctly (i.e., there may be method | ||
314 | * calls within the term_arg elements of the body.) | ||
315 | * | ||
316 | * However, we must continue parsing because | ||
317 | * the opregion is not a standalone package -- | ||
318 | * we don't know where the end is at this point. | ||
319 | * | ||
320 | * (Length is unknown until parse of the body complete) | ||
321 | */ | ||
322 | op->named.data = aml_op_start; | ||
323 | op->named.length = 0; | ||
324 | } | ||
325 | } else { | ||
326 | /* Not a named opcode, just allocate Op and append to parent */ | ||
327 | 339 | ||
328 | walk_state->op_info = | 340 | return_ACPI_STATUS(status); |
329 | acpi_ps_get_opcode_info(walk_state->opcode); | 341 | } |
330 | op = acpi_ps_alloc_op(walk_state->opcode); | ||
331 | if (!op) { | ||
332 | status = AE_NO_MEMORY; | ||
333 | goto close_this_op; | ||
334 | } | ||
335 | 342 | ||
336 | if (walk_state->op_info->flags & AML_CREATE) { | 343 | /******************************************************************************* |
337 | /* | 344 | * |
338 | * Backup to beginning of create_xXXfield declaration | 345 | * FUNCTION: acpi_ps_get_arguments |
339 | * body_length is unknown until we parse the body | 346 | * |
340 | */ | 347 | * PARAMETERS: walk_state - Current state |
341 | op->named.data = aml_op_start; | 348 | * aml_op_start - Op start in AML |
342 | op->named.length = 0; | 349 | * Op - Current Op |
343 | } | 350 | * |
351 | * RETURN: Status | ||
352 | * | ||
353 | * DESCRIPTION: Get arguments for passed Op. | ||
354 | * | ||
355 | ******************************************************************************/ | ||
344 | 356 | ||
345 | acpi_ps_append_arg(acpi_ps_get_parent_scope | 357 | static acpi_status |
346 | (parser_state), op); | 358 | acpi_ps_get_arguments(struct acpi_walk_state *walk_state, |
359 | u8 * aml_op_start, union acpi_parse_object *op) | ||
360 | { | ||
361 | acpi_status status = AE_OK; | ||
362 | union acpi_parse_object *arg = NULL; | ||
347 | 363 | ||
348 | if ((walk_state->descending_callback != NULL)) { | 364 | ACPI_FUNCTION_TRACE_PTR(ps_get_arguments, walk_state); |
349 | /* | ||
350 | * Find the object. This will either insert the object into | ||
351 | * the namespace or simply look it up | ||
352 | */ | ||
353 | walk_state->op = op; | ||
354 | 365 | ||
355 | status = | 366 | switch (op->common.aml_opcode) { |
356 | walk_state-> | 367 | case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ |
357 | descending_callback(walk_state, | 368 | case AML_WORD_OP: /* AML_WORDDATA_ARG */ |
358 | &op); | 369 | case AML_DWORD_OP: /* AML_DWORDATA_ARG */ |
359 | status = | 370 | case AML_QWORD_OP: /* AML_QWORDATA_ARG */ |
360 | acpi_ps_next_parse_state(walk_state, | 371 | case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ |
361 | op, | ||
362 | status); | ||
363 | if (status == AE_CTRL_PENDING) { | ||
364 | status = AE_OK; | ||
365 | goto close_this_op; | ||
366 | } | ||
367 | 372 | ||
368 | if (ACPI_FAILURE(status)) { | 373 | /* Fill in constant or string argument directly */ |
369 | goto close_this_op; | ||
370 | } | ||
371 | } | ||
372 | } | ||
373 | 374 | ||
374 | op->common.aml_offset = walk_state->aml_offset; | 375 | acpi_ps_get_next_simple_arg(&(walk_state->parser_state), |
376 | GET_CURRENT_ARG_TYPE(walk_state-> | ||
377 | arg_types), | ||
378 | op); | ||
379 | break; | ||
375 | 380 | ||
376 | if (walk_state->op_info) { | 381 | case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ |
377 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | 382 | |
378 | "Opcode %4.4X [%s] Op %p Aml %p AmlOffset %5.5X\n", | 383 | status = |
379 | (u32) op->common.aml_opcode, | 384 | acpi_ps_get_next_namepath(walk_state, |
380 | walk_state->op_info->name, op, | 385 | &(walk_state->parser_state), op, |
381 | parser_state->aml, | 386 | 1); |
382 | op->common.aml_offset)); | 387 | if (ACPI_FAILURE(status)) { |
383 | } | 388 | return_ACPI_STATUS(status); |
384 | } | 389 | } |
385 | 390 | ||
391 | walk_state->arg_types = 0; | ||
392 | break; | ||
393 | |||
394 | default: | ||
386 | /* | 395 | /* |
387 | * Start arg_count at zero because we don't know if there are | 396 | * Op is not a constant or string, append each argument to the Op |
388 | * any args yet | ||
389 | */ | 397 | */ |
390 | walk_state->arg_count = 0; | 398 | while (GET_CURRENT_ARG_TYPE(walk_state->arg_types) |
391 | 399 | && !walk_state->arg_count) { | |
392 | /* Are there any arguments that must be processed? */ | 400 | walk_state->aml_offset = |
393 | 401 | (u32) ACPI_PTR_DIFF(walk_state->parser_state.aml, | |
394 | if (walk_state->arg_types) { | 402 | walk_state->parser_state. |
395 | 403 | aml_start); | |
396 | /* Get arguments */ | ||
397 | |||
398 | switch (op->common.aml_opcode) { | ||
399 | case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ | ||
400 | case AML_WORD_OP: /* AML_WORDDATA_ARG */ | ||
401 | case AML_DWORD_OP: /* AML_DWORDATA_ARG */ | ||
402 | case AML_QWORD_OP: /* AML_QWORDATA_ARG */ | ||
403 | case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ | ||
404 | |||
405 | /* Fill in constant or string argument directly */ | ||
406 | |||
407 | acpi_ps_get_next_simple_arg(parser_state, | ||
408 | GET_CURRENT_ARG_TYPE | ||
409 | (walk_state-> | ||
410 | arg_types), op); | ||
411 | break; | ||
412 | |||
413 | case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ | ||
414 | |||
415 | status = | ||
416 | acpi_ps_get_next_namepath(walk_state, | ||
417 | parser_state, op, | ||
418 | 1); | ||
419 | if (ACPI_FAILURE(status)) { | ||
420 | goto close_this_op; | ||
421 | } | ||
422 | |||
423 | walk_state->arg_types = 0; | ||
424 | break; | ||
425 | 404 | ||
426 | default: | 405 | status = |
427 | /* | 406 | acpi_ps_get_next_arg(walk_state, |
428 | * Op is not a constant or string, append each argument | 407 | &(walk_state->parser_state), |
429 | * to the Op | 408 | GET_CURRENT_ARG_TYPE |
430 | */ | 409 | (walk_state->arg_types), &arg); |
431 | while (GET_CURRENT_ARG_TYPE | 410 | if (ACPI_FAILURE(status)) { |
432 | (walk_state->arg_types) | 411 | return_ACPI_STATUS(status); |
433 | && !walk_state->arg_count) { | 412 | } |
434 | walk_state->aml_offset = (u32) | ||
435 | ACPI_PTR_DIFF(parser_state->aml, | ||
436 | parser_state-> | ||
437 | aml_start); | ||
438 | 413 | ||
439 | status = | 414 | if (arg) { |
440 | acpi_ps_get_next_arg(walk_state, | 415 | arg->common.aml_offset = walk_state->aml_offset; |
441 | parser_state, | 416 | acpi_ps_append_arg(op, arg); |
442 | GET_CURRENT_ARG_TYPE | 417 | } |
443 | (walk_state-> | ||
444 | arg_types), | ||
445 | &arg); | ||
446 | if (ACPI_FAILURE(status)) { | ||
447 | goto close_this_op; | ||
448 | } | ||
449 | 418 | ||
450 | if (arg) { | 419 | INCREMENT_ARG_LIST(walk_state->arg_types); |
451 | arg->common.aml_offset = | 420 | } |
452 | walk_state->aml_offset; | ||
453 | acpi_ps_append_arg(op, arg); | ||
454 | } | ||
455 | INCREMENT_ARG_LIST(walk_state-> | ||
456 | arg_types); | ||
457 | } | ||
458 | 421 | ||
459 | /* Special processing for certain opcodes */ | 422 | /* Special processing for certain opcodes */ |
460 | 423 | ||
461 | /* TBD (remove): Temporary mechanism to disable this code if needed */ | 424 | /* TBD (remove): Temporary mechanism to disable this code if needed */ |
462 | 425 | ||
463 | #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE | 426 | #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE |
464 | 427 | ||
465 | if ((walk_state->pass_number <= | 428 | if ((walk_state->pass_number <= ACPI_IMODE_LOAD_PASS1) && |
466 | ACPI_IMODE_LOAD_PASS1) | 429 | ((walk_state->parse_flags & ACPI_PARSE_DISASSEMBLE) == 0)) { |
467 | && | 430 | /* |
468 | ((walk_state-> | 431 | * We want to skip If/Else/While constructs during Pass1 because we |
469 | parse_flags & ACPI_PARSE_DISASSEMBLE) == | 432 | * want to actually conditionally execute the code during Pass2. |
470 | 0)) { | 433 | * |
471 | /* | 434 | * Except for disassembly, where we always want to walk the |
472 | * We want to skip If/Else/While constructs during Pass1 | 435 | * If/Else/While packages |
473 | * because we want to actually conditionally execute the | 436 | */ |
474 | * code during Pass2. | 437 | switch (op->common.aml_opcode) { |
475 | * | 438 | case AML_IF_OP: |
476 | * Except for disassembly, where we always want to | 439 | case AML_ELSE_OP: |
477 | * walk the If/Else/While packages | 440 | case AML_WHILE_OP: |
478 | */ | ||
479 | switch (op->common.aml_opcode) { | ||
480 | case AML_IF_OP: | ||
481 | case AML_ELSE_OP: | ||
482 | case AML_WHILE_OP: | ||
483 | |||
484 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | ||
485 | "Pass1: Skipping an If/Else/While body\n")); | ||
486 | |||
487 | /* Skip body of if/else/while in pass 1 */ | ||
488 | |||
489 | parser_state->aml = | ||
490 | parser_state->pkg_end; | ||
491 | walk_state->arg_count = 0; | ||
492 | break; | ||
493 | |||
494 | default: | ||
495 | break; | ||
496 | } | ||
497 | } | ||
498 | #endif | ||
499 | switch (op->common.aml_opcode) { | ||
500 | case AML_METHOD_OP: | ||
501 | |||
502 | /* | ||
503 | * Skip parsing of control method | ||
504 | * because we don't have enough info in the first pass | ||
505 | * to parse it correctly. | ||
506 | * | ||
507 | * Save the length and address of the body | ||
508 | */ | ||
509 | op->named.data = parser_state->aml; | ||
510 | op->named.length = | ||
511 | (u32) (parser_state->pkg_end - | ||
512 | parser_state->aml); | ||
513 | |||
514 | /* Skip body of method */ | ||
515 | |||
516 | parser_state->aml = | ||
517 | parser_state->pkg_end; | ||
518 | walk_state->arg_count = 0; | ||
519 | break; | ||
520 | |||
521 | case AML_BUFFER_OP: | ||
522 | case AML_PACKAGE_OP: | ||
523 | case AML_VAR_PACKAGE_OP: | ||
524 | |||
525 | if ((op->common.parent) && | ||
526 | (op->common.parent->common. | ||
527 | aml_opcode == AML_NAME_OP) | ||
528 | && (walk_state->pass_number <= | ||
529 | ACPI_IMODE_LOAD_PASS2)) { | ||
530 | /* | ||
531 | * Skip parsing of Buffers and Packages | ||
532 | * because we don't have enough info in the first pass | ||
533 | * to parse them correctly. | ||
534 | */ | ||
535 | op->named.data = aml_op_start; | ||
536 | op->named.length = | ||
537 | (u32) (parser_state-> | ||
538 | pkg_end - | ||
539 | aml_op_start); | ||
540 | |||
541 | /* Skip body */ | ||
542 | |||
543 | parser_state->aml = | ||
544 | parser_state->pkg_end; | ||
545 | walk_state->arg_count = 0; | ||
546 | } | ||
547 | break; | ||
548 | 441 | ||
549 | case AML_WHILE_OP: | 442 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
443 | "Pass1: Skipping an If/Else/While body\n")); | ||
550 | 444 | ||
551 | if (walk_state->control_state) { | 445 | /* Skip body of if/else/while in pass 1 */ |
552 | walk_state->control_state-> | ||
553 | control.package_end = | ||
554 | parser_state->pkg_end; | ||
555 | } | ||
556 | break; | ||
557 | 446 | ||
558 | default: | 447 | walk_state->parser_state.aml = |
448 | walk_state->parser_state.pkg_end; | ||
449 | walk_state->arg_count = 0; | ||
450 | break; | ||
559 | 451 | ||
560 | /* No action for all other opcodes */ | 452 | default: |
561 | break; | ||
562 | } | ||
563 | break; | 453 | break; |
564 | } | 454 | } |
565 | } | 455 | } |
456 | #endif | ||
566 | 457 | ||
567 | /* Check for arguments that need to be processed */ | 458 | switch (op->common.aml_opcode) { |
568 | 459 | case AML_METHOD_OP: | |
569 | if (walk_state->arg_count) { | ||
570 | /* | 460 | /* |
571 | * There are arguments (complex ones), push Op and | 461 | * Skip parsing of control method because we don't have enough |
572 | * prepare for argument | 462 | * info in the first pass to parse it correctly. |
463 | * | ||
464 | * Save the length and address of the body | ||
573 | */ | 465 | */ |
574 | status = acpi_ps_push_scope(parser_state, op, | 466 | op->named.data = walk_state->parser_state.aml; |
575 | walk_state->arg_types, | 467 | op->named.length = (u32) |
576 | walk_state->arg_count); | 468 | (walk_state->parser_state.pkg_end - |
577 | if (ACPI_FAILURE(status)) { | 469 | walk_state->parser_state.aml); |
578 | goto close_this_op; | ||
579 | } | ||
580 | op = NULL; | ||
581 | continue; | ||
582 | } | ||
583 | 470 | ||
584 | /* | 471 | /* Skip body of method */ |
585 | * All arguments have been processed -- Op is complete, | ||
586 | * prepare for next | ||
587 | */ | ||
588 | walk_state->op_info = | ||
589 | acpi_ps_get_opcode_info(op->common.aml_opcode); | ||
590 | if (walk_state->op_info->flags & AML_NAMED) { | ||
591 | if (acpi_gbl_depth) { | ||
592 | acpi_gbl_depth--; | ||
593 | } | ||
594 | 472 | ||
595 | if (op->common.aml_opcode == AML_REGION_OP) { | 473 | walk_state->parser_state.aml = |
474 | walk_state->parser_state.pkg_end; | ||
475 | walk_state->arg_count = 0; | ||
476 | break; | ||
477 | |||
478 | case AML_BUFFER_OP: | ||
479 | case AML_PACKAGE_OP: | ||
480 | case AML_VAR_PACKAGE_OP: | ||
481 | |||
482 | if ((op->common.parent) && | ||
483 | (op->common.parent->common.aml_opcode == | ||
484 | AML_NAME_OP) | ||
485 | && (walk_state->pass_number <= | ||
486 | ACPI_IMODE_LOAD_PASS2)) { | ||
596 | /* | 487 | /* |
597 | * Skip parsing of control method or opregion body, | 488 | * Skip parsing of Buffers and Packages because we don't have |
598 | * because we don't have enough info in the first pass | 489 | * enough info in the first pass to parse them correctly. |
599 | * to parse them correctly. | ||
600 | * | ||
601 | * Completed parsing an op_region declaration, we now | ||
602 | * know the length. | ||
603 | */ | 490 | */ |
604 | op->named.length = | 491 | op->named.data = aml_op_start; |
605 | (u32) (parser_state->aml - op->named.data); | 492 | op->named.length = (u32) |
606 | } | 493 | (walk_state->parser_state.pkg_end - |
607 | } | 494 | aml_op_start); |
608 | 495 | ||
609 | if (walk_state->op_info->flags & AML_CREATE) { | 496 | /* Skip body */ |
610 | /* | ||
611 | * Backup to beginning of create_xXXfield declaration (1 for | ||
612 | * Opcode) | ||
613 | * | ||
614 | * body_length is unknown until we parse the body | ||
615 | */ | ||
616 | op->named.length = | ||
617 | (u32) (parser_state->aml - op->named.data); | ||
618 | } | ||
619 | 497 | ||
620 | /* This op complete, notify the dispatcher */ | 498 | walk_state->parser_state.aml = |
499 | walk_state->parser_state.pkg_end; | ||
500 | walk_state->arg_count = 0; | ||
501 | } | ||
502 | break; | ||
621 | 503 | ||
622 | if (walk_state->ascending_callback != NULL) { | 504 | case AML_WHILE_OP: |
623 | walk_state->op = op; | ||
624 | walk_state->opcode = op->common.aml_opcode; | ||
625 | 505 | ||
626 | status = walk_state->ascending_callback(walk_state); | 506 | if (walk_state->control_state) { |
627 | status = | 507 | walk_state->control_state->control.package_end = |
628 | acpi_ps_next_parse_state(walk_state, op, status); | 508 | walk_state->parser_state.pkg_end; |
629 | if (status == AE_CTRL_PENDING) { | ||
630 | status = AE_OK; | ||
631 | goto close_this_op; | ||
632 | } | 509 | } |
633 | } | 510 | break; |
634 | |||
635 | close_this_op: | ||
636 | /* | ||
637 | * Finished one argument of the containing scope | ||
638 | */ | ||
639 | parser_state->scope->parse_scope.arg_count--; | ||
640 | 511 | ||
641 | /* Finished with pre_op */ | 512 | default: |
642 | 513 | ||
643 | if (pre_op) { | 514 | /* No action for all other opcodes */ |
644 | acpi_ps_free_op(pre_op); | 515 | break; |
645 | pre_op = NULL; | ||
646 | } | 516 | } |
647 | 517 | ||
648 | /* Close this Op (will result in parse subtree deletion) */ | 518 | break; |
519 | } | ||
649 | 520 | ||
650 | status2 = acpi_ps_complete_this_op(walk_state, op); | 521 | return_ACPI_STATUS(AE_OK); |
651 | if (ACPI_FAILURE(status2)) { | 522 | } |
652 | return_ACPI_STATUS(status2); | ||
653 | } | ||
654 | op = NULL; | ||
655 | 523 | ||
656 | switch (status) { | 524 | /******************************************************************************* |
657 | case AE_OK: | 525 | * |
658 | break; | 526 | * FUNCTION: acpi_ps_complete_op |
527 | * | ||
528 | * PARAMETERS: walk_state - Current state | ||
529 | * Op - Returned Op | ||
530 | * Status - Parse status before complete Op | ||
531 | * | ||
532 | * RETURN: Status | ||
533 | * | ||
534 | * DESCRIPTION: Complete Op | ||
535 | * | ||
536 | ******************************************************************************/ | ||
659 | 537 | ||
660 | case AE_CTRL_TRANSFER: | 538 | static acpi_status |
539 | acpi_ps_complete_op(struct acpi_walk_state *walk_state, | ||
540 | union acpi_parse_object **op, acpi_status status) | ||
541 | { | ||
542 | acpi_status status2; | ||
661 | 543 | ||
662 | /* We are about to transfer to a called method. */ | 544 | ACPI_FUNCTION_TRACE_PTR(ps_complete_op, walk_state); |
663 | 545 | ||
664 | walk_state->prev_op = op; | 546 | /* |
665 | walk_state->prev_arg_types = walk_state->arg_types; | 547 | * Finished one argument of the containing scope |
666 | return_ACPI_STATUS(status); | 548 | */ |
549 | walk_state->parser_state.scope->parse_scope.arg_count--; | ||
667 | 550 | ||
668 | case AE_CTRL_END: | 551 | /* Close this Op (will result in parse subtree deletion) */ |
669 | 552 | ||
670 | acpi_ps_pop_scope(parser_state, &op, | 553 | status2 = acpi_ps_complete_this_op(walk_state, *op); |
671 | &walk_state->arg_types, | 554 | if (ACPI_FAILURE(status2)) { |
672 | &walk_state->arg_count); | 555 | return_ACPI_STATUS(status2); |
556 | } | ||
673 | 557 | ||
674 | if (op) { | 558 | *op = NULL; |
675 | walk_state->op = op; | ||
676 | walk_state->op_info = | ||
677 | acpi_ps_get_opcode_info(op->common. | ||
678 | aml_opcode); | ||
679 | walk_state->opcode = op->common.aml_opcode; | ||
680 | 559 | ||
681 | status = | 560 | switch (status) { |
682 | walk_state->ascending_callback(walk_state); | 561 | case AE_OK: |
683 | status = | 562 | break; |
684 | acpi_ps_next_parse_state(walk_state, op, | ||
685 | status); | ||
686 | 563 | ||
687 | status2 = | 564 | case AE_CTRL_TRANSFER: |
688 | acpi_ps_complete_this_op(walk_state, op); | ||
689 | if (ACPI_FAILURE(status2)) { | ||
690 | return_ACPI_STATUS(status2); | ||
691 | } | ||
692 | op = NULL; | ||
693 | } | ||
694 | status = AE_OK; | ||
695 | break; | ||
696 | 565 | ||
697 | case AE_CTRL_BREAK: | 566 | /* We are about to transfer to a called method */ |
698 | case AE_CTRL_CONTINUE: | ||
699 | 567 | ||
700 | /* Pop off scopes until we find the While */ | 568 | walk_state->prev_op = NULL; |
569 | walk_state->prev_arg_types = walk_state->arg_types; | ||
570 | return_ACPI_STATUS(status); | ||
701 | 571 | ||
702 | while (!op || (op->common.aml_opcode != AML_WHILE_OP)) { | 572 | case AE_CTRL_END: |
703 | acpi_ps_pop_scope(parser_state, &op, | ||
704 | &walk_state->arg_types, | ||
705 | &walk_state->arg_count); | ||
706 | 573 | ||
707 | if (op->common.aml_opcode != AML_WHILE_OP) { | 574 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
708 | status2 = | 575 | &walk_state->arg_types, |
709 | acpi_ds_result_stack_pop | 576 | &walk_state->arg_count); |
710 | (walk_state); | ||
711 | if (ACPI_FAILURE(status2)) { | ||
712 | return_ACPI_STATUS(status2); | ||
713 | } | ||
714 | } | ||
715 | } | ||
716 | |||
717 | /* Close this iteration of the While loop */ | ||
718 | 577 | ||
719 | walk_state->op = op; | 578 | if (*op) { |
579 | walk_state->op = *op; | ||
720 | walk_state->op_info = | 580 | walk_state->op_info = |
721 | acpi_ps_get_opcode_info(op->common.aml_opcode); | 581 | acpi_ps_get_opcode_info((*op)->common.aml_opcode); |
722 | walk_state->opcode = op->common.aml_opcode; | 582 | walk_state->opcode = (*op)->common.aml_opcode; |
723 | 583 | ||
724 | status = walk_state->ascending_callback(walk_state); | 584 | status = walk_state->ascending_callback(walk_state); |
725 | status = | 585 | status = |
726 | acpi_ps_next_parse_state(walk_state, op, status); | 586 | acpi_ps_next_parse_state(walk_state, *op, status); |
727 | 587 | ||
728 | status2 = acpi_ps_complete_this_op(walk_state, op); | 588 | status2 = acpi_ps_complete_this_op(walk_state, *op); |
729 | if (ACPI_FAILURE(status2)) { | 589 | if (ACPI_FAILURE(status2)) { |
730 | return_ACPI_STATUS(status2); | 590 | return_ACPI_STATUS(status2); |
731 | } | 591 | } |
732 | op = NULL; | 592 | } |
733 | |||
734 | status = AE_OK; | ||
735 | break; | ||
736 | 593 | ||
737 | case AE_CTRL_TERMINATE: | 594 | status = AE_OK; |
595 | break; | ||
738 | 596 | ||
739 | status = AE_OK; | 597 | case AE_CTRL_BREAK: |
598 | case AE_CTRL_CONTINUE: | ||
740 | 599 | ||
741 | /* Clean up */ | 600 | /* Pop off scopes until we find the While */ |
742 | do { | ||
743 | if (op) { | ||
744 | status2 = | ||
745 | acpi_ps_complete_this_op(walk_state, | ||
746 | op); | ||
747 | if (ACPI_FAILURE(status2)) { | ||
748 | return_ACPI_STATUS(status2); | ||
749 | } | ||
750 | 601 | ||
751 | status2 = | 602 | while (!(*op) || ((*op)->common.aml_opcode != AML_WHILE_OP)) { |
752 | acpi_ds_result_stack_pop | 603 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
753 | (walk_state); | 604 | &walk_state->arg_types, |
754 | if (ACPI_FAILURE(status2)) { | 605 | &walk_state->arg_count); |
755 | return_ACPI_STATUS(status2); | ||
756 | } | ||
757 | 606 | ||
758 | acpi_ut_delete_generic_state | 607 | if ((*op)->common.aml_opcode != AML_WHILE_OP) { |
759 | (acpi_ut_pop_generic_state | 608 | status2 = acpi_ds_result_stack_pop(walk_state); |
760 | (&walk_state->control_state)); | 609 | if (ACPI_FAILURE(status2)) { |
610 | return_ACPI_STATUS(status2); | ||
761 | } | 611 | } |
612 | } | ||
613 | } | ||
762 | 614 | ||
763 | acpi_ps_pop_scope(parser_state, &op, | 615 | /* Close this iteration of the While loop */ |
764 | &walk_state->arg_types, | ||
765 | &walk_state->arg_count); | ||
766 | 616 | ||
767 | } while (op); | 617 | walk_state->op = *op; |
618 | walk_state->op_info = | ||
619 | acpi_ps_get_opcode_info((*op)->common.aml_opcode); | ||
620 | walk_state->opcode = (*op)->common.aml_opcode; | ||
768 | 621 | ||
769 | return_ACPI_STATUS(status); | 622 | status = walk_state->ascending_callback(walk_state); |
623 | status = acpi_ps_next_parse_state(walk_state, *op, status); | ||
770 | 624 | ||
771 | default: /* All other non-AE_OK status */ | 625 | status2 = acpi_ps_complete_this_op(walk_state, *op); |
626 | if (ACPI_FAILURE(status2)) { | ||
627 | return_ACPI_STATUS(status2); | ||
628 | } | ||
772 | 629 | ||
773 | do { | 630 | status = AE_OK; |
774 | if (op) { | 631 | break; |
775 | status2 = | 632 | |
776 | acpi_ps_complete_this_op(walk_state, | 633 | case AE_CTRL_TERMINATE: |
777 | op); | 634 | |
778 | if (ACPI_FAILURE(status2)) { | 635 | /* Clean up */ |
779 | return_ACPI_STATUS(status2); | 636 | do { |
780 | } | 637 | if (*op) { |
638 | status2 = | ||
639 | acpi_ps_complete_this_op(walk_state, *op); | ||
640 | if (ACPI_FAILURE(status2)) { | ||
641 | return_ACPI_STATUS(status2); | ||
642 | } | ||
643 | status2 = acpi_ds_result_stack_pop(walk_state); | ||
644 | if (ACPI_FAILURE(status2)) { | ||
645 | return_ACPI_STATUS(status2); | ||
781 | } | 646 | } |
782 | 647 | ||
783 | acpi_ps_pop_scope(parser_state, &op, | 648 | acpi_ut_delete_generic_state |
784 | &walk_state->arg_types, | 649 | (acpi_ut_pop_generic_state |
785 | &walk_state->arg_count); | 650 | (&walk_state->control_state)); |
651 | } | ||
786 | 652 | ||
787 | } while (op); | 653 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
654 | &walk_state->arg_types, | ||
655 | &walk_state->arg_count); | ||
788 | 656 | ||
789 | /* | 657 | } while (*op); |
790 | * TBD: Cleanup parse ops on error | 658 | |
791 | */ | 659 | return_ACPI_STATUS(AE_OK); |
792 | #if 0 | 660 | |
793 | if (op == NULL) { | 661 | default: /* All other non-AE_OK status */ |
794 | acpi_ps_pop_scope(parser_state, &op, | 662 | |
795 | &walk_state->arg_types, | 663 | do { |
796 | &walk_state->arg_count); | 664 | if (*op) { |
665 | status2 = | ||
666 | acpi_ps_complete_this_op(walk_state, *op); | ||
667 | if (ACPI_FAILURE(status2)) { | ||
668 | return_ACPI_STATUS(status2); | ||
669 | } | ||
797 | } | 670 | } |
798 | #endif | ||
799 | walk_state->prev_op = op; | ||
800 | walk_state->prev_arg_types = walk_state->arg_types; | ||
801 | return_ACPI_STATUS(status); | ||
802 | } | ||
803 | 671 | ||
804 | /* This scope complete? */ | 672 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
673 | &walk_state->arg_types, | ||
674 | &walk_state->arg_count); | ||
805 | 675 | ||
806 | if (acpi_ps_has_completed_scope(parser_state)) { | 676 | } while (*op); |
807 | acpi_ps_pop_scope(parser_state, &op, | 677 | |
678 | #if 0 | ||
679 | /* | ||
680 | * TBD: Cleanup parse ops on error | ||
681 | */ | ||
682 | if (*op == NULL) { | ||
683 | acpi_ps_pop_scope(parser_state, op, | ||
808 | &walk_state->arg_types, | 684 | &walk_state->arg_types, |
809 | &walk_state->arg_count); | 685 | &walk_state->arg_count); |
810 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | ||
811 | "Popped scope, Op=%p\n", op)); | ||
812 | } else { | ||
813 | op = NULL; | ||
814 | } | 686 | } |
687 | #endif | ||
688 | walk_state->prev_op = NULL; | ||
689 | walk_state->prev_arg_types = walk_state->arg_types; | ||
690 | return_ACPI_STATUS(status); | ||
691 | } | ||
815 | 692 | ||
816 | } /* while parser_state->Aml */ | 693 | /* This scope complete? */ |
694 | |||
695 | if (acpi_ps_has_completed_scope(&(walk_state->parser_state))) { | ||
696 | acpi_ps_pop_scope(&(walk_state->parser_state), op, | ||
697 | &walk_state->arg_types, | ||
698 | &walk_state->arg_count); | ||
699 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Popped scope, Op=%p\n", *op)); | ||
700 | } else { | ||
701 | *op = NULL; | ||
702 | } | ||
703 | |||
704 | return_ACPI_STATUS(AE_OK); | ||
705 | } | ||
706 | |||
707 | /******************************************************************************* | ||
708 | * | ||
709 | * FUNCTION: acpi_ps_complete_final_op | ||
710 | * | ||
711 | * PARAMETERS: walk_state - Current state | ||
712 | * Op - Current Op | ||
713 | * Status - Current parse status before complete last | ||
714 | * Op | ||
715 | * | ||
716 | * RETURN: Status | ||
717 | * | ||
718 | * DESCRIPTION: Complete last Op. | ||
719 | * | ||
720 | ******************************************************************************/ | ||
721 | |||
722 | static acpi_status | ||
723 | acpi_ps_complete_final_op(struct acpi_walk_state *walk_state, | ||
724 | union acpi_parse_object *op, acpi_status status) | ||
725 | { | ||
726 | acpi_status status2; | ||
727 | |||
728 | ACPI_FUNCTION_TRACE_PTR(ps_complete_final_op, walk_state); | ||
817 | 729 | ||
818 | /* | 730 | /* |
819 | * Complete the last Op (if not completed), and clear the scope stack. | 731 | * Complete the last Op (if not completed), and clear the scope stack. |
820 | * It is easily possible to end an AML "package" with an unbounded number | 732 | * It is easily possible to end an AML "package" with an unbounded number |
821 | * of open scopes (such as when several ASL blocks are closed with | 733 | * of open scopes (such as when several ASL blocks are closed with |
822 | * sequential closing braces). We want to terminate each one cleanly. | 734 | * sequential closing braces). We want to terminate each one cleanly. |
823 | */ | 735 | */ |
824 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "AML package complete at Op %p\n", | 736 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "AML package complete at Op %p\n", |
825 | op)); | 737 | op)); |
@@ -838,8 +750,12 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) | |||
838 | acpi_ps_next_parse_state(walk_state, op, | 750 | acpi_ps_next_parse_state(walk_state, op, |
839 | status); | 751 | status); |
840 | if (status == AE_CTRL_PENDING) { | 752 | if (status == AE_CTRL_PENDING) { |
841 | status = AE_OK; | 753 | status = |
842 | goto close_this_op; | 754 | acpi_ps_complete_op(walk_state, &op, |
755 | AE_OK); | ||
756 | if (ACPI_FAILURE(status)) { | ||
757 | return_ACPI_STATUS(status); | ||
758 | } | ||
843 | } | 759 | } |
844 | 760 | ||
845 | if (status == AE_CTRL_TERMINATE) { | 761 | if (status == AE_CTRL_TERMINATE) { |
@@ -858,7 +774,9 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) | |||
858 | } | 774 | } |
859 | } | 775 | } |
860 | 776 | ||
861 | acpi_ps_pop_scope(parser_state, | 777 | acpi_ps_pop_scope(& |
778 | (walk_state-> | ||
779 | parser_state), | ||
862 | &op, | 780 | &op, |
863 | &walk_state-> | 781 | &walk_state-> |
864 | arg_types, | 782 | arg_types, |
@@ -887,10 +805,252 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) | |||
887 | } | 805 | } |
888 | } | 806 | } |
889 | 807 | ||
890 | acpi_ps_pop_scope(parser_state, &op, &walk_state->arg_types, | 808 | acpi_ps_pop_scope(&(walk_state->parser_state), &op, |
809 | &walk_state->arg_types, | ||
891 | &walk_state->arg_count); | 810 | &walk_state->arg_count); |
892 | 811 | ||
893 | } while (op); | 812 | } while (op); |
894 | 813 | ||
895 | return_ACPI_STATUS(status); | 814 | return_ACPI_STATUS(status); |
896 | } | 815 | } |
816 | |||
817 | /******************************************************************************* | ||
818 | * | ||
819 | * FUNCTION: acpi_ps_parse_loop | ||
820 | * | ||
821 | * PARAMETERS: walk_state - Current state | ||
822 | * | ||
823 | * RETURN: Status | ||
824 | * | ||
825 | * DESCRIPTION: Parse AML (pointed to by the current parser state) and return | ||
826 | * a tree of ops. | ||
827 | * | ||
828 | ******************************************************************************/ | ||
829 | |||
830 | acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) | ||
831 | { | ||
832 | acpi_status status = AE_OK; | ||
833 | union acpi_parse_object *op = NULL; /* current op */ | ||
834 | struct acpi_parse_state *parser_state; | ||
835 | u8 *aml_op_start = NULL; | ||
836 | |||
837 | ACPI_FUNCTION_TRACE_PTR(ps_parse_loop, walk_state); | ||
838 | |||
839 | if (walk_state->descending_callback == NULL) { | ||
840 | return_ACPI_STATUS(AE_BAD_PARAMETER); | ||
841 | } | ||
842 | |||
843 | parser_state = &walk_state->parser_state; | ||
844 | walk_state->arg_types = 0; | ||
845 | |||
846 | #if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) | ||
847 | |||
848 | if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) { | ||
849 | |||
850 | /* We are restarting a preempted control method */ | ||
851 | |||
852 | if (acpi_ps_has_completed_scope(parser_state)) { | ||
853 | /* | ||
854 | * We must check if a predicate to an IF or WHILE statement | ||
855 | * was just completed | ||
856 | */ | ||
857 | if ((parser_state->scope->parse_scope.op) && | ||
858 | ((parser_state->scope->parse_scope.op->common. | ||
859 | aml_opcode == AML_IF_OP) | ||
860 | || (parser_state->scope->parse_scope.op->common. | ||
861 | aml_opcode == AML_WHILE_OP)) | ||
862 | && (walk_state->control_state) | ||
863 | && (walk_state->control_state->common.state == | ||
864 | ACPI_CONTROL_PREDICATE_EXECUTING)) { | ||
865 | /* | ||
866 | * A predicate was just completed, get the value of the | ||
867 | * predicate and branch based on that value | ||
868 | */ | ||
869 | walk_state->op = NULL; | ||
870 | status = | ||
871 | acpi_ds_get_predicate_value(walk_state, | ||
872 | ACPI_TO_POINTER | ||
873 | (TRUE)); | ||
874 | if (ACPI_FAILURE(status) | ||
875 | && ((status & AE_CODE_MASK) != | ||
876 | AE_CODE_CONTROL)) { | ||
877 | if (status == AE_AML_NO_RETURN_VALUE) { | ||
878 | ACPI_EXCEPTION((AE_INFO, status, | ||
879 | "Invoked method did not return a value")); | ||
880 | |||
881 | } | ||
882 | |||
883 | ACPI_EXCEPTION((AE_INFO, status, | ||
884 | "GetPredicate Failed")); | ||
885 | return_ACPI_STATUS(status); | ||
886 | } | ||
887 | |||
888 | status = | ||
889 | acpi_ps_next_parse_state(walk_state, op, | ||
890 | status); | ||
891 | } | ||
892 | |||
893 | acpi_ps_pop_scope(parser_state, &op, | ||
894 | &walk_state->arg_types, | ||
895 | &walk_state->arg_count); | ||
896 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | ||
897 | "Popped scope, Op=%p\n", op)); | ||
898 | } else if (walk_state->prev_op) { | ||
899 | |||
900 | /* We were in the middle of an op */ | ||
901 | |||
902 | op = walk_state->prev_op; | ||
903 | walk_state->arg_types = walk_state->prev_arg_types; | ||
904 | } | ||
905 | } | ||
906 | #endif | ||
907 | |||
908 | /* Iterative parsing loop, while there is more AML to process: */ | ||
909 | |||
910 | while ((parser_state->aml < parser_state->aml_end) || (op)) { | ||
911 | aml_op_start = parser_state->aml; | ||
912 | if (!op) { | ||
913 | status = | ||
914 | acpi_ps_create_op(walk_state, aml_op_start, &op); | ||
915 | if (ACPI_FAILURE(status)) { | ||
916 | if (status == AE_CTRL_PARSE_CONTINUE) { | ||
917 | continue; | ||
918 | } | ||
919 | |||
920 | if (status == AE_CTRL_PARSE_PENDING) { | ||
921 | status = AE_OK; | ||
922 | } | ||
923 | |||
924 | status = | ||
925 | acpi_ps_complete_op(walk_state, &op, | ||
926 | status); | ||
927 | if (ACPI_FAILURE(status)) { | ||
928 | return_ACPI_STATUS(status); | ||
929 | } | ||
930 | |||
931 | continue; | ||
932 | } | ||
933 | |||
934 | op->common.aml_offset = walk_state->aml_offset; | ||
935 | |||
936 | if (walk_state->op_info) { | ||
937 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | ||
938 | "Opcode %4.4X [%s] Op %p Aml %p AmlOffset %5.5X\n", | ||
939 | (u32) op->common.aml_opcode, | ||
940 | walk_state->op_info->name, op, | ||
941 | parser_state->aml, | ||
942 | op->common.aml_offset)); | ||
943 | } | ||
944 | } | ||
945 | |||
946 | /* | ||
947 | * Start arg_count at zero because we don't know if there are | ||
948 | * any args yet | ||
949 | */ | ||
950 | walk_state->arg_count = 0; | ||
951 | |||
952 | /* Are there any arguments that must be processed? */ | ||
953 | |||
954 | if (walk_state->arg_types) { | ||
955 | |||
956 | /* Get arguments */ | ||
957 | |||
958 | status = | ||
959 | acpi_ps_get_arguments(walk_state, aml_op_start, op); | ||
960 | if (ACPI_FAILURE(status)) { | ||
961 | status = | ||
962 | acpi_ps_complete_op(walk_state, &op, | ||
963 | status); | ||
964 | if (ACPI_FAILURE(status)) { | ||
965 | return_ACPI_STATUS(status); | ||
966 | } | ||
967 | |||
968 | continue; | ||
969 | } | ||
970 | } | ||
971 | |||
972 | /* Check for arguments that need to be processed */ | ||
973 | |||
974 | if (walk_state->arg_count) { | ||
975 | /* | ||
976 | * There are arguments (complex ones), push Op and | ||
977 | * prepare for argument | ||
978 | */ | ||
979 | status = acpi_ps_push_scope(parser_state, op, | ||
980 | walk_state->arg_types, | ||
981 | walk_state->arg_count); | ||
982 | if (ACPI_FAILURE(status)) { | ||
983 | status = | ||
984 | acpi_ps_complete_op(walk_state, &op, | ||
985 | status); | ||
986 | if (ACPI_FAILURE(status)) { | ||
987 | return_ACPI_STATUS(status); | ||
988 | } | ||
989 | |||
990 | continue; | ||
991 | } | ||
992 | |||
993 | op = NULL; | ||
994 | continue; | ||
995 | } | ||
996 | |||
997 | /* | ||
998 | * All arguments have been processed -- Op is complete, | ||
999 | * prepare for next | ||
1000 | */ | ||
1001 | walk_state->op_info = | ||
1002 | acpi_ps_get_opcode_info(op->common.aml_opcode); | ||
1003 | if (walk_state->op_info->flags & AML_NAMED) { | ||
1004 | if (acpi_gbl_depth) { | ||
1005 | acpi_gbl_depth--; | ||
1006 | } | ||
1007 | |||
1008 | if (op->common.aml_opcode == AML_REGION_OP) { | ||
1009 | /* | ||
1010 | * Skip parsing of control method or opregion body, | ||
1011 | * because we don't have enough info in the first pass | ||
1012 | * to parse them correctly. | ||
1013 | * | ||
1014 | * Completed parsing an op_region declaration, we now | ||
1015 | * know the length. | ||
1016 | */ | ||
1017 | op->named.length = | ||
1018 | (u32) (parser_state->aml - op->named.data); | ||
1019 | } | ||
1020 | } | ||
1021 | |||
1022 | if (walk_state->op_info->flags & AML_CREATE) { | ||
1023 | /* | ||
1024 | * Backup to beginning of create_xXXfield declaration (1 for | ||
1025 | * Opcode) | ||
1026 | * | ||
1027 | * body_length is unknown until we parse the body | ||
1028 | */ | ||
1029 | op->named.length = | ||
1030 | (u32) (parser_state->aml - op->named.data); | ||
1031 | } | ||
1032 | |||
1033 | /* This op complete, notify the dispatcher */ | ||
1034 | |||
1035 | if (walk_state->ascending_callback != NULL) { | ||
1036 | walk_state->op = op; | ||
1037 | walk_state->opcode = op->common.aml_opcode; | ||
1038 | |||
1039 | status = walk_state->ascending_callback(walk_state); | ||
1040 | status = | ||
1041 | acpi_ps_next_parse_state(walk_state, op, status); | ||
1042 | if (status == AE_CTRL_PENDING) { | ||
1043 | status = AE_OK; | ||
1044 | } | ||
1045 | } | ||
1046 | |||
1047 | status = acpi_ps_complete_op(walk_state, &op, status); | ||
1048 | if (ACPI_FAILURE(status)) { | ||
1049 | return_ACPI_STATUS(status); | ||
1050 | } | ||
1051 | |||
1052 | } /* while parser_state->Aml */ | ||
1053 | |||
1054 | status = acpi_ps_complete_final_op(walk_state, op, status); | ||
1055 | return_ACPI_STATUS(status); | ||
1056 | } | ||