diff options
Diffstat (limited to 'drivers/acpi/parser/psparse.c')
| -rw-r--r-- | drivers/acpi/parser/psparse.c | 362 |
1 files changed, 185 insertions, 177 deletions
diff --git a/drivers/acpi/parser/psparse.c b/drivers/acpi/parser/psparse.c index 16b84a3d0436..3248051d77ee 100644 --- a/drivers/acpi/parser/psparse.c +++ b/drivers/acpi/parser/psparse.c @@ -41,7 +41,6 @@ * POSSIBILITY OF SUCH DAMAGES. */ - /* * Parse the AML and build an operation tree as most interpreters, * like Perl, do. Parsing is done by hand rather than with a YACC @@ -59,8 +58,7 @@ #include <acpi/acinterp.h> #define _COMPONENT ACPI_PARSER - ACPI_MODULE_NAME ("psparse") - +ACPI_MODULE_NAME("psparse") /******************************************************************************* * @@ -73,10 +71,7 @@ * DESCRIPTION: Get the size of the current opcode. * ******************************************************************************/ - -u32 -acpi_ps_get_opcode_size ( - u32 opcode) +u32 acpi_ps_get_opcode_size(u32 opcode) { /* Extended (2-byte) opcode if > 255 */ @@ -90,7 +85,6 @@ acpi_ps_get_opcode_size ( return (1); } - /******************************************************************************* * * FUNCTION: acpi_ps_peek_opcode @@ -103,28 +97,24 @@ acpi_ps_get_opcode_size ( * ******************************************************************************/ -u16 -acpi_ps_peek_opcode ( - struct acpi_parse_state *parser_state) +u16 acpi_ps_peek_opcode(struct acpi_parse_state * parser_state) { - u8 *aml; - u16 opcode; - + u8 *aml; + u16 opcode; aml = parser_state->aml; - opcode = (u16) ACPI_GET8 (aml); + opcode = (u16) ACPI_GET8(aml); if (opcode == AML_EXTENDED_OP_PREFIX) { /* Extended opcode, get the second opcode byte */ aml++; - opcode = (u16) ((opcode << 8) | ACPI_GET8 (aml)); + opcode = (u16) ((opcode << 8) | ACPI_GET8(aml)); } return (opcode); } - /******************************************************************************* * * FUNCTION: acpi_ps_complete_this_op @@ -139,30 +129,28 @@ acpi_ps_peek_opcode ( ******************************************************************************/ acpi_status -acpi_ps_complete_this_op ( - struct acpi_walk_state *walk_state, - union acpi_parse_object *op) +acpi_ps_complete_this_op(struct acpi_walk_state * walk_state, + union acpi_parse_object * op) { - union acpi_parse_object *prev; - union acpi_parse_object *next; - const struct acpi_opcode_info *parent_info; - union acpi_parse_object *replacement_op = NULL; - - - ACPI_FUNCTION_TRACE_PTR ("ps_complete_this_op", op); + union acpi_parse_object *prev; + union acpi_parse_object *next; + const struct acpi_opcode_info *parent_info; + union acpi_parse_object *replacement_op = NULL; + ACPI_FUNCTION_TRACE_PTR("ps_complete_this_op", op); /* Check for null Op, can happen if AML code is corrupt */ if (!op) { - return_ACPI_STATUS (AE_OK); /* OK for now */ + return_ACPI_STATUS(AE_OK); /* OK for now */ } /* Delete this op and the subtree below it if asked to */ - if (((walk_state->parse_flags & ACPI_PARSE_TREE_MASK) != ACPI_PARSE_DELETE_TREE) || - (walk_state->op_info->class == AML_CLASS_ARGUMENT)) { - return_ACPI_STATUS (AE_OK); + if (((walk_state->parse_flags & ACPI_PARSE_TREE_MASK) != + ACPI_PARSE_DELETE_TREE) + || (walk_state->op_info->class == AML_CLASS_ARGUMENT)) { + return_ACPI_STATUS(AE_OK); } /* Make sure that we only delete this subtree */ @@ -179,7 +167,9 @@ acpi_ps_complete_this_op ( * Check if we need to replace the operator and its subtree * with a return value op (placeholder op) */ - parent_info = acpi_ps_get_opcode_info (op->common.parent->common.aml_opcode); + parent_info = + acpi_ps_get_opcode_info(op->common.parent->common. + aml_opcode); switch (parent_info->class) { case AML_CLASS_CONTROL: @@ -191,7 +181,8 @@ acpi_ps_complete_this_op ( * These opcodes contain term_arg operands. The current * op must be replaced by a placeholder return op */ - replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP); + replacement_op = + acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP); if (!replacement_op) { goto allocate_error; } @@ -203,35 +194,49 @@ acpi_ps_complete_this_op ( * These opcodes contain term_arg operands. The current * op must be replaced by a placeholder return op */ - if ((op->common.parent->common.aml_opcode == AML_REGION_OP) || - (op->common.parent->common.aml_opcode == AML_DATA_REGION_OP) || - (op->common.parent->common.aml_opcode == AML_BUFFER_OP) || - (op->common.parent->common.aml_opcode == AML_PACKAGE_OP) || - (op->common.parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) { - replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP); + if ((op->common.parent->common.aml_opcode == + AML_REGION_OP) + || (op->common.parent->common.aml_opcode == + AML_DATA_REGION_OP) + || (op->common.parent->common.aml_opcode == + AML_BUFFER_OP) + || (op->common.parent->common.aml_opcode == + AML_PACKAGE_OP) + || (op->common.parent->common.aml_opcode == + AML_VAR_PACKAGE_OP)) { + replacement_op = + acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP); if (!replacement_op) { goto allocate_error; } - } - else if ((op->common.parent->common.aml_opcode == AML_NAME_OP) && - (walk_state->pass_number <= ACPI_IMODE_LOAD_PASS2)) { - if ((op->common.aml_opcode == AML_BUFFER_OP) || - (op->common.aml_opcode == AML_PACKAGE_OP) || - (op->common.aml_opcode == AML_VAR_PACKAGE_OP)) { - replacement_op = acpi_ps_alloc_op (op->common.aml_opcode); + } else + if ((op->common.parent->common.aml_opcode == + AML_NAME_OP) + && (walk_state->pass_number <= + ACPI_IMODE_LOAD_PASS2)) { + if ((op->common.aml_opcode == AML_BUFFER_OP) + || (op->common.aml_opcode == AML_PACKAGE_OP) + || (op->common.aml_opcode == + AML_VAR_PACKAGE_OP)) { + replacement_op = + acpi_ps_alloc_op(op->common. + aml_opcode); if (!replacement_op) { goto allocate_error; } - replacement_op->named.data = op->named.data; - replacement_op->named.length = op->named.length; + replacement_op->named.data = + op->named.data; + replacement_op->named.length = + op->named.length; } } break; default: - replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP); + replacement_op = + acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP); if (!replacement_op) { goto allocate_error; } @@ -243,59 +248,64 @@ acpi_ps_complete_this_op ( /* This op is the first in the list */ if (replacement_op) { - replacement_op->common.parent = op->common.parent; - replacement_op->common.value.arg = NULL; - replacement_op->common.node = op->common.node; - op->common.parent->common.value.arg = replacement_op; - replacement_op->common.next = op->common.next; - } - else { - op->common.parent->common.value.arg = op->common.next; + replacement_op->common.parent = + op->common.parent; + replacement_op->common.value.arg = NULL; + replacement_op->common.node = op->common.node; + op->common.parent->common.value.arg = + replacement_op; + replacement_op->common.next = op->common.next; + } else { + op->common.parent->common.value.arg = + op->common.next; } } /* Search the parent list */ - else while (prev) { - /* Traverse all siblings in the parent's argument list */ - - next = prev->common.next; - if (next == op) { - if (replacement_op) { - replacement_op->common.parent = op->common.parent; - replacement_op->common.value.arg = NULL; - replacement_op->common.node = op->common.node; - prev->common.next = replacement_op; - replacement_op->common.next = op->common.next; - next = NULL; - } - else { - prev->common.next = op->common.next; - next = NULL; + else + while (prev) { + /* Traverse all siblings in the parent's argument list */ + + next = prev->common.next; + if (next == op) { + if (replacement_op) { + replacement_op->common.parent = + op->common.parent; + replacement_op->common.value. + arg = NULL; + replacement_op->common.node = + op->common.node; + prev->common.next = + replacement_op; + replacement_op->common.next = + op->common.next; + next = NULL; + } else { + prev->common.next = + op->common.next; + next = NULL; + } } + prev = next; } - prev = next; - } } - -cleanup: + cleanup: /* Now we can actually delete the subtree rooted at Op */ - acpi_ps_delete_parse_tree (op); - return_ACPI_STATUS (AE_OK); + acpi_ps_delete_parse_tree(op); + return_ACPI_STATUS(AE_OK); - -allocate_error: + allocate_error: /* Always delete the subtree, even on error */ - acpi_ps_delete_parse_tree (op); - return_ACPI_STATUS (AE_NO_MEMORY); + acpi_ps_delete_parse_tree(op); + return_ACPI_STATUS(AE_NO_MEMORY); } - /******************************************************************************* * * FUNCTION: acpi_ps_next_parse_state @@ -312,17 +322,14 @@ allocate_error: ******************************************************************************/ acpi_status -acpi_ps_next_parse_state ( - struct acpi_walk_state *walk_state, - union acpi_parse_object *op, - acpi_status callback_status) +acpi_ps_next_parse_state(struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + acpi_status callback_status) { - struct acpi_parse_state *parser_state = &walk_state->parser_state; - acpi_status status = AE_CTRL_PENDING; - - - ACPI_FUNCTION_TRACE_PTR ("ps_next_parse_state", op); + struct acpi_parse_state *parser_state = &walk_state->parser_state; + acpi_status status = AE_CTRL_PENDING; + ACPI_FUNCTION_TRACE_PTR("ps_next_parse_state", op); switch (callback_status) { case AE_CTRL_TERMINATE: @@ -335,7 +342,6 @@ acpi_ps_next_parse_state ( status = AE_CTRL_TERMINATE; break; - case AE_CTRL_BREAK: parser_state->aml = walk_state->aml_last_while; @@ -345,7 +351,6 @@ acpi_ps_next_parse_state ( case AE_CTRL_CONTINUE: - parser_state->aml = walk_state->aml_last_while; status = AE_CTRL_CONTINUE; break; @@ -369,10 +374,9 @@ acpi_ps_next_parse_state ( * Predicate of an IF was true, and we are at the matching ELSE. * Just close out this package */ - parser_state->aml = acpi_ps_get_next_package_end (parser_state); + parser_state->aml = acpi_ps_get_next_package_end(parser_state); break; - case AE_CTRL_FALSE: /* @@ -390,7 +394,6 @@ acpi_ps_next_parse_state ( status = AE_CTRL_END; break; - case AE_CTRL_TRANSFER: /* A method call (invocation) -- transfer control */ @@ -398,14 +401,15 @@ acpi_ps_next_parse_state ( status = AE_CTRL_TRANSFER; walk_state->prev_op = op; walk_state->method_call_op = op; - walk_state->method_call_node = (op->common.value.arg)->common.node; + walk_state->method_call_node = + (op->common.value.arg)->common.node; /* Will return value (if any) be used by the caller? */ - walk_state->return_used = acpi_ds_is_result_used (op, walk_state); + walk_state->return_used = + acpi_ds_is_result_used(op, walk_state); break; - default: status = callback_status; @@ -415,10 +419,9 @@ acpi_ps_next_parse_state ( break; } - return_ACPI_STATUS (status); + return_ACPI_STATUS(status); } - /******************************************************************************* * * FUNCTION: acpi_ps_parse_aml @@ -432,34 +435,30 @@ acpi_ps_next_parse_state ( * ******************************************************************************/ -acpi_status -acpi_ps_parse_aml ( - struct acpi_walk_state *walk_state) +acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state) { - acpi_status status; - acpi_status terminate_status; - struct acpi_thread_state *thread; - struct acpi_thread_state *prev_walk_list = acpi_gbl_current_walk_list; - struct acpi_walk_state *previous_walk_state; - - - ACPI_FUNCTION_TRACE ("ps_parse_aml"); + acpi_status status; + acpi_status terminate_status; + struct acpi_thread_state *thread; + struct acpi_thread_state *prev_walk_list = acpi_gbl_current_walk_list; + struct acpi_walk_state *previous_walk_state; - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "Entered with walk_state=%p Aml=%p size=%X\n", - walk_state, walk_state->parser_state.aml, - walk_state->parser_state.aml_size)); + ACPI_FUNCTION_TRACE("ps_parse_aml"); + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, + "Entered with walk_state=%p Aml=%p size=%X\n", + walk_state, walk_state->parser_state.aml, + walk_state->parser_state.aml_size)); /* Create and initialize a new thread state */ - thread = acpi_ut_create_thread_state (); + thread = acpi_ut_create_thread_state(); if (!thread) { - return_ACPI_STATUS (AE_NO_MEMORY); + return_ACPI_STATUS(AE_NO_MEMORY); } walk_state->thread = thread; - acpi_ds_push_walk_state (walk_state, thread); + acpi_ds_push_walk_state(walk_state, thread); /* * This global allows the AML debugger to get a handle to the currently @@ -471,54 +470,56 @@ acpi_ps_parse_aml ( * Execute the walk loop as long as there is a valid Walk State. This * handles nested control method invocations without recursion. */ - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "State=%p\n", walk_state)); + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "State=%p\n", walk_state)); status = AE_OK; while (walk_state) { - if (ACPI_SUCCESS (status)) { + if (ACPI_SUCCESS(status)) { /* * The parse_loop executes AML until the method terminates * or calls another method. */ - status = acpi_ps_parse_loop (walk_state); + status = acpi_ps_parse_loop(walk_state); } - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "Completed one call to walk loop, %s State=%p\n", - acpi_format_exception (status), walk_state)); + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, + "Completed one call to walk loop, %s State=%p\n", + acpi_format_exception(status), walk_state)); if (status == AE_CTRL_TRANSFER) { /* * A method call was detected. * Transfer control to the called control method */ - status = acpi_ds_call_control_method (thread, walk_state, NULL); + status = + acpi_ds_call_control_method(thread, walk_state, + NULL); /* * If the transfer to the new method method call worked, a new walk * state was created -- get it */ - walk_state = acpi_ds_get_current_walk_state (thread); + walk_state = acpi_ds_get_current_walk_state(thread); continue; - } - else if (status == AE_CTRL_TERMINATE) { + } else if (status == AE_CTRL_TERMINATE) { status = AE_OK; - } - else if ((status != AE_OK) && (walk_state->method_desc)) { - ACPI_REPORT_METHOD_ERROR ("Method execution failed", - walk_state->method_node, NULL, status); + } else if ((status != AE_OK) && (walk_state->method_desc)) { + ACPI_REPORT_METHOD_ERROR("Method execution failed", + walk_state->method_node, NULL, + status); /* Check for possible multi-thread reentrancy problem */ if ((status == AE_ALREADY_EXISTS) && - (!walk_state->method_desc->method.semaphore)) { + (!walk_state->method_desc->method.semaphore)) { /* * This method is marked not_serialized, but it tried to create * a named object, causing the second thread entrance to fail. * We will workaround this by marking the method permanently * as Serialized. */ - walk_state->method_desc->method.method_flags |= AML_METHOD_SERIALIZED; + walk_state->method_desc->method.method_flags |= + AML_METHOD_SERIALIZED; walk_state->method_desc->method.concurrency = 1; } } @@ -533,21 +534,22 @@ acpi_ps_parse_aml ( /* We are done with this walk, move on to the parent if any */ - walk_state = acpi_ds_pop_walk_state (thread); + walk_state = acpi_ds_pop_walk_state(thread); /* Reset the current scope to the beginning of scope stack */ - acpi_ds_scope_stack_clear (walk_state); + acpi_ds_scope_stack_clear(walk_state); /* * If we just returned from the execution of a control method, * there's lots of cleanup to do */ - if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == ACPI_PARSE_EXECUTE) { - terminate_status = acpi_ds_terminate_control_method (walk_state); - if (ACPI_FAILURE (terminate_status)) { - ACPI_REPORT_ERROR (( - "Could not terminate control method properly\n")); + if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == + ACPI_PARSE_EXECUTE) { + terminate_status = + acpi_ds_terminate_control_method(walk_state); + if (ACPI_FAILURE(terminate_status)) { + ACPI_REPORT_ERROR(("Could not terminate control method properly\n")); /* Ignore error and continue */ } @@ -555,46 +557,53 @@ acpi_ps_parse_aml ( /* Delete this walk state and all linked control states */ - acpi_ps_cleanup_scope (&walk_state->parser_state); + acpi_ps_cleanup_scope(&walk_state->parser_state); previous_walk_state = walk_state; - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "return_value=%p, implicit_value=%p State=%p\n", - walk_state->return_desc, walk_state->implicit_return_obj, walk_state)); + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, + "return_value=%p, implicit_value=%p State=%p\n", + walk_state->return_desc, + walk_state->implicit_return_obj, walk_state)); /* Check if we have restarted a preempted walk */ - walk_state = acpi_ds_get_current_walk_state (thread); + walk_state = acpi_ds_get_current_walk_state(thread); if (walk_state) { - if (ACPI_SUCCESS (status)) { + if (ACPI_SUCCESS(status)) { /* * There is another walk state, restart it. * If the method return value is not used by the parent, * The object is deleted */ if (!previous_walk_state->return_desc) { - status = acpi_ds_restart_control_method (walk_state, - previous_walk_state->implicit_return_obj); - } - else { + status = + acpi_ds_restart_control_method + (walk_state, + previous_walk_state-> + implicit_return_obj); + } else { /* * We have a valid return value, delete any implicit * return value. */ - acpi_ds_clear_implicit_return (previous_walk_state); + acpi_ds_clear_implicit_return + (previous_walk_state); - status = acpi_ds_restart_control_method (walk_state, - previous_walk_state->return_desc); + status = + acpi_ds_restart_control_method + (walk_state, + previous_walk_state->return_desc); } - if (ACPI_SUCCESS (status)) { - walk_state->walk_type |= ACPI_WALK_METHOD_RESTART; + if (ACPI_SUCCESS(status)) { + walk_state->walk_type |= + ACPI_WALK_METHOD_RESTART; } - } - else { + } else { /* On error, delete any return object */ - acpi_ut_remove_reference (previous_walk_state->return_desc); + acpi_ut_remove_reference(previous_walk_state-> + return_desc); } } @@ -605,37 +614,36 @@ acpi_ps_parse_aml ( else if (previous_walk_state->caller_return_desc) { if (previous_walk_state->implicit_return_obj) { *(previous_walk_state->caller_return_desc) = - previous_walk_state->implicit_return_obj; - } - else { - /* NULL if no return value */ + previous_walk_state->implicit_return_obj; + } else { + /* NULL if no return value */ *(previous_walk_state->caller_return_desc) = - previous_walk_state->return_desc; + previous_walk_state->return_desc; } - } - else { + } else { if (previous_walk_state->return_desc) { /* Caller doesn't want it, must delete it */ - acpi_ut_remove_reference (previous_walk_state->return_desc); + acpi_ut_remove_reference(previous_walk_state-> + return_desc); } if (previous_walk_state->implicit_return_obj) { /* Caller doesn't want it, must delete it */ - acpi_ut_remove_reference (previous_walk_state->implicit_return_obj); + acpi_ut_remove_reference(previous_walk_state-> + implicit_return_obj); } } - acpi_ds_delete_walk_state (previous_walk_state); + acpi_ds_delete_walk_state(previous_walk_state); } /* Normal exit */ - acpi_ex_release_all_mutexes (thread); - acpi_ut_delete_generic_state (ACPI_CAST_PTR (union acpi_generic_state, thread)); + acpi_ex_release_all_mutexes(thread); + acpi_ut_delete_generic_state(ACPI_CAST_PTR + (union acpi_generic_state, thread)); acpi_gbl_current_walk_list = prev_walk_list; - return_ACPI_STATUS (status); + return_ACPI_STATUS(status); } - - |