diff options
Diffstat (limited to 'drivers/acpi/parser/psparse.c')
| -rw-r--r-- | drivers/acpi/parser/psparse.c | 723 |
1 files changed, 30 insertions, 693 deletions
diff --git a/drivers/acpi/parser/psparse.c b/drivers/acpi/parser/psparse.c index bbfdc1a58c27..16b84a3d0436 100644 --- a/drivers/acpi/parser/psparse.c +++ b/drivers/acpi/parser/psparse.c @@ -62,26 +62,6 @@ ACPI_MODULE_NAME ("psparse") -static u32 acpi_gbl_depth = 0; - -/* Local prototypes */ - -static void -acpi_ps_complete_this_op ( - struct acpi_walk_state *walk_state, - union acpi_parse_object *op); - -static acpi_status -acpi_ps_next_parse_state ( - struct acpi_walk_state *walk_state, - union acpi_parse_object *op, - acpi_status callback_status); - -static acpi_status -acpi_ps_parse_loop ( - struct acpi_walk_state *walk_state); - - /******************************************************************************* * * FUNCTION: acpi_ps_get_opcode_size @@ -134,8 +114,8 @@ acpi_ps_peek_opcode ( aml = parser_state->aml; opcode = (u16) ACPI_GET8 (aml); - if (opcode == AML_EXTOP) { - /* Extended opcode */ + if (opcode == AML_EXTENDED_OP_PREFIX) { + /* Extended opcode, get the second opcode byte */ aml++; opcode = (u16) ((opcode << 8) | ACPI_GET8 (aml)); @@ -152,13 +132,13 @@ acpi_ps_peek_opcode ( * PARAMETERS: walk_state - Current State * Op - Op to complete * - * RETURN: None. + * RETURN: Status * * DESCRIPTION: Perform any cleanup at the completion of an Op. * ******************************************************************************/ -static void +acpi_status acpi_ps_complete_this_op ( struct acpi_walk_state *walk_state, union acpi_parse_object *op) @@ -175,19 +155,26 @@ acpi_ps_complete_this_op ( /* Check for null Op, can happen if AML code is corrupt */ if (!op) { - return_VOID; + 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_VOID; + return_ACPI_STATUS (AE_OK); } /* Make sure that we only delete this subtree */ if (op->common.parent) { + prev = op->common.parent->common.value.arg; + if (!prev) { + /* Nothing more to do */ + + goto cleanup; + } + /* * Check if we need to replace the operator and its subtree * with a return value op (placeholder op) @@ -206,7 +193,7 @@ acpi_ps_complete_this_op ( */ replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP); if (!replacement_op) { - goto cleanup; + goto allocate_error; } break; @@ -223,18 +210,17 @@ acpi_ps_complete_this_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 cleanup; + goto allocate_error; } } - - if ((op->common.parent->common.aml_opcode == AML_NAME_OP) && - (walk_state->descending_callback != acpi_ds_exec_begin_op)) { + 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 cleanup; + goto allocate_error; } replacement_op->named.data = op->named.data; @@ -244,15 +230,15 @@ acpi_ps_complete_this_op ( break; default: + replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP); if (!replacement_op) { - goto cleanup; + goto allocate_error; } } /* We must unlink this op from the parent tree */ - prev = op->common.parent->common.value.arg; if (prev == op) { /* This op is the first in the list */ @@ -298,7 +284,15 @@ cleanup: /* Now we can actually delete the subtree rooted at Op */ acpi_ps_delete_parse_tree (op); - return_VOID; + return_ACPI_STATUS (AE_OK); + + +allocate_error: + + /* Always delete the subtree, even on error */ + + acpi_ps_delete_parse_tree (op); + return_ACPI_STATUS (AE_NO_MEMORY); } @@ -317,7 +311,7 @@ cleanup: * ******************************************************************************/ -static acpi_status +acpi_status acpi_ps_next_parse_state ( struct acpi_walk_state *walk_state, union acpi_parse_object *op, @@ -427,663 +421,6 @@ acpi_ps_next_parse_state ( /******************************************************************************* * - * FUNCTION: acpi_ps_parse_loop - * - * PARAMETERS: walk_state - Current state - * - * RETURN: Status - * - * DESCRIPTION: Parse AML (pointed to by the current parser state) and return - * a tree of ops. - * - ******************************************************************************/ - -static acpi_status -acpi_ps_parse_loop ( - struct acpi_walk_state *walk_state) -{ - acpi_status status = AE_OK; - union acpi_parse_object *op = NULL; /* current op */ - union acpi_parse_object *arg = NULL; - union acpi_parse_object *pre_op = NULL; - struct acpi_parse_state *parser_state; - u8 *aml_op_start = NULL; - - - ACPI_FUNCTION_TRACE_PTR ("ps_parse_loop", walk_state); - - if (walk_state->descending_callback == NULL) { - return_ACPI_STATUS (AE_BAD_PARAMETER); - } - - parser_state = &walk_state->parser_state; - walk_state->arg_types = 0; - -#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) - - if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) { - /* We are restarting a preempted control method */ - - if (acpi_ps_has_completed_scope (parser_state)) { - /* - * We must check if a predicate to an IF or WHILE statement - * was just completed - */ - if ((parser_state->scope->parse_scope.op) && - ((parser_state->scope->parse_scope.op->common.aml_opcode == AML_IF_OP) || - (parser_state->scope->parse_scope.op->common.aml_opcode == AML_WHILE_OP)) && - (walk_state->control_state) && - (walk_state->control_state->common.state == - ACPI_CONTROL_PREDICATE_EXECUTING)) { - /* - * A predicate was just completed, get the value of the - * predicate and branch based on that value - */ - walk_state->op = NULL; - status = acpi_ds_get_predicate_value (walk_state, ACPI_TO_POINTER (TRUE)); - if (ACPI_FAILURE (status) && - ((status & AE_CODE_MASK) != AE_CODE_CONTROL)) { - if (status == AE_AML_NO_RETURN_VALUE) { - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "Invoked method did not return a value, %s\n", - acpi_format_exception (status))); - - } - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "get_predicate Failed, %s\n", - acpi_format_exception (status))); - return_ACPI_STATUS (status); - } - - status = acpi_ps_next_parse_state (walk_state, op, status); - } - - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op)); - } - else if (walk_state->prev_op) { - /* We were in the middle of an op */ - - op = walk_state->prev_op; - walk_state->arg_types = walk_state->prev_arg_types; - } - } -#endif - - /* Iterative parsing loop, while there is more AML to process: */ - - while ((parser_state->aml < parser_state->aml_end) || (op)) { - aml_op_start = parser_state->aml; - if (!op) { - /* Get the next opcode from the AML stream */ - - walk_state->aml_offset = (u32) ACPI_PTR_DIFF (parser_state->aml, - parser_state->aml_start); - walk_state->opcode = acpi_ps_peek_opcode (parser_state); - - /* - * First cut to determine what we have found: - * 1) A valid AML opcode - * 2) A name string - * 3) An unknown/invalid opcode - */ - walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode); - switch (walk_state->op_info->class) { - case AML_CLASS_ASCII: - case AML_CLASS_PREFIX: - /* - * Starts with a valid prefix or ASCII char, this is a name - * string. Convert the bare name string to a namepath. - */ - walk_state->opcode = AML_INT_NAMEPATH_OP; - walk_state->arg_types = ARGP_NAMESTRING; - break; - - case AML_CLASS_UNKNOWN: - - /* The opcode is unrecognized. Just skip unknown opcodes */ - - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "Found unknown opcode %X at AML address %p offset %X, ignoring\n", - walk_state->opcode, parser_state->aml, walk_state->aml_offset)); - - ACPI_DUMP_BUFFER (parser_state->aml, 128); - - /* Assume one-byte bad opcode */ - - parser_state->aml++; - continue; - - default: - - /* Found opcode info, this is a normal opcode */ - - parser_state->aml += acpi_ps_get_opcode_size (walk_state->opcode); - walk_state->arg_types = walk_state->op_info->parse_args; - break; - } - - /* Create Op structure and append to parent's argument list */ - - if (walk_state->op_info->flags & AML_NAMED) { - /* Allocate a new pre_op if necessary */ - - if (!pre_op) { - pre_op = acpi_ps_alloc_op (walk_state->opcode); - if (!pre_op) { - status = AE_NO_MEMORY; - goto close_this_op; - } - } - - pre_op->common.value.arg = NULL; - pre_op->common.aml_opcode = walk_state->opcode; - - /* - * Get and append arguments until we find the node that contains - * the name (the type ARGP_NAME). - */ - while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) && - (GET_CURRENT_ARG_TYPE (walk_state->arg_types) != ARGP_NAME)) { - status = acpi_ps_get_next_arg (walk_state, parser_state, - GET_CURRENT_ARG_TYPE (walk_state->arg_types), &arg); - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - - acpi_ps_append_arg (pre_op, arg); - INCREMENT_ARG_LIST (walk_state->arg_types); - } - - /* - * Make sure that we found a NAME and didn't run out of - * arguments - */ - if (!GET_CURRENT_ARG_TYPE (walk_state->arg_types)) { - status = AE_AML_NO_OPERAND; - goto close_this_op; - } - - /* We know that this arg is a name, move to next arg */ - - INCREMENT_ARG_LIST (walk_state->arg_types); - - /* - * Find the object. This will either insert the object into - * the namespace or simply look it up - */ - walk_state->op = NULL; - - status = walk_state->descending_callback (walk_state, &op); - if (ACPI_FAILURE (status)) { - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "During name lookup/catalog, %s\n", - acpi_format_exception (status))); - goto close_this_op; - } - - if (!op) { - continue; - } - - status = acpi_ps_next_parse_state (walk_state, op, status); - if (status == AE_CTRL_PENDING) { - status = AE_OK; - goto close_this_op; - } - - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - - acpi_ps_append_arg (op, pre_op->common.value.arg); - acpi_gbl_depth++; - - if (op->common.aml_opcode == AML_REGION_OP) { - /* - * Defer final parsing of an operation_region body, - * because we don't have enough info in the first pass - * to parse it correctly (i.e., there may be method - * calls within the term_arg elements of the body.) - * - * However, we must continue parsing because - * the opregion is not a standalone package -- - * we don't know where the end is at this point. - * - * (Length is unknown until parse of the body complete) - */ - op->named.data = aml_op_start; - op->named.length = 0; - } - } - else { - /* Not a named opcode, just allocate Op and append to parent */ - - walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode); - op = acpi_ps_alloc_op (walk_state->opcode); - if (!op) { - status = AE_NO_MEMORY; - goto close_this_op; - } - - if (walk_state->op_info->flags & AML_CREATE) { - /* - * Backup to beginning of create_xXXfield declaration - * body_length is unknown until we parse the body - */ - op->named.data = aml_op_start; - op->named.length = 0; - } - - acpi_ps_append_arg (acpi_ps_get_parent_scope (parser_state), op); - - if ((walk_state->descending_callback != NULL)) { - /* - * Find the object. This will either insert the object into - * the namespace or simply look it up - */ - walk_state->op = op; - - status = walk_state->descending_callback (walk_state, &op); - status = acpi_ps_next_parse_state (walk_state, op, status); - if (status == AE_CTRL_PENDING) { - status = AE_OK; - goto close_this_op; - } - - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - } - } - - op->common.aml_offset = walk_state->aml_offset; - - if (walk_state->op_info) { - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "Opcode %4.4X [%s] Op %p Aml %p aml_offset %5.5X\n", - (u32) op->common.aml_opcode, walk_state->op_info->name, - op, parser_state->aml, op->common.aml_offset)); - } - } - - - /* - * Start arg_count at zero because we don't know if there are - * any args yet - */ - walk_state->arg_count = 0; - - /* Are there any arguments that must be processed? */ - - if (walk_state->arg_types) { - /* Get arguments */ - - switch (op->common.aml_opcode) { - case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ - case AML_WORD_OP: /* AML_WORDDATA_ARG */ - case AML_DWORD_OP: /* AML_DWORDATA_ARG */ - case AML_QWORD_OP: /* AML_QWORDATA_ARG */ - case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ - - /* Fill in constant or string argument directly */ - - acpi_ps_get_next_simple_arg (parser_state, - GET_CURRENT_ARG_TYPE (walk_state->arg_types), op); - break; - - case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ - - status = acpi_ps_get_next_namepath (walk_state, parser_state, op, 1); - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - - walk_state->arg_types = 0; - break; - - default: - - /* - * Op is not a constant or string, append each argument - * to the Op - */ - while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) && - !walk_state->arg_count) { - walk_state->aml_offset = (u32) - ACPI_PTR_DIFF (parser_state->aml, parser_state->aml_start); - - status = acpi_ps_get_next_arg (walk_state, parser_state, - GET_CURRENT_ARG_TYPE (walk_state->arg_types), - &arg); - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - - if (arg) { - arg->common.aml_offset = walk_state->aml_offset; - acpi_ps_append_arg (op, arg); - } - INCREMENT_ARG_LIST (walk_state->arg_types); - } - - /* Special processing for certain opcodes */ - - switch (op->common.aml_opcode) { - case AML_METHOD_OP: - - /* - * Skip parsing of control method - * because we don't have enough info in the first pass - * to parse it correctly. - * - * Save the length and address of the body - */ - op->named.data = parser_state->aml; - op->named.length = (u32) (parser_state->pkg_end - - parser_state->aml); - - /* Skip body of method */ - - parser_state->aml = parser_state->pkg_end; - walk_state->arg_count = 0; - break; - - case AML_BUFFER_OP: - case AML_PACKAGE_OP: - case AML_VAR_PACKAGE_OP: - - if ((op->common.parent) && - (op->common.parent->common.aml_opcode == AML_NAME_OP) && - (walk_state->descending_callback != acpi_ds_exec_begin_op)) { - /* - * Skip parsing of Buffers and Packages - * because we don't have enough info in the first pass - * to parse them correctly. - */ - op->named.data = aml_op_start; - op->named.length = (u32) (parser_state->pkg_end - - aml_op_start); - - /* Skip body */ - - parser_state->aml = parser_state->pkg_end; - walk_state->arg_count = 0; - } - break; - - case AML_WHILE_OP: - - if (walk_state->control_state) { - walk_state->control_state->control.package_end = - parser_state->pkg_end; - } - break; - - default: - - /* No action for all other opcodes */ - break; - } - break; - } - } - - /* Check for arguments that need to be processed */ - - if (walk_state->arg_count) { - /* - * There are arguments (complex ones), push Op and - * prepare for argument - */ - status = acpi_ps_push_scope (parser_state, op, - walk_state->arg_types, walk_state->arg_count); - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - op = NULL; - continue; - } - - /* - * All arguments have been processed -- Op is complete, - * prepare for next - */ - walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode); - if (walk_state->op_info->flags & AML_NAMED) { - if (acpi_gbl_depth) { - acpi_gbl_depth--; - } - - if (op->common.aml_opcode == AML_REGION_OP) { - /* - * Skip parsing of control method or opregion body, - * because we don't have enough info in the first pass - * to parse them correctly. - * - * Completed parsing an op_region declaration, we now - * know the length. - */ - op->named.length = (u32) (parser_state->aml - op->named.data); - } - } - - if (walk_state->op_info->flags & AML_CREATE) { - /* - * Backup to beginning of create_xXXfield declaration (1 for - * Opcode) - * - * body_length is unknown until we parse the body - */ - op->named.length = (u32) (parser_state->aml - op->named.data); - } - - /* This op complete, notify the dispatcher */ - - if (walk_state->ascending_callback != NULL) { - walk_state->op = op; - walk_state->opcode = op->common.aml_opcode; - - status = walk_state->ascending_callback (walk_state); - status = acpi_ps_next_parse_state (walk_state, op, status); - if (status == AE_CTRL_PENDING) { - status = AE_OK; - goto close_this_op; - } - } - - -close_this_op: - /* - * Finished one argument of the containing scope - */ - parser_state->scope->parse_scope.arg_count--; - - /* Close this Op (will result in parse subtree deletion) */ - - acpi_ps_complete_this_op (walk_state, op); - op = NULL; - if (pre_op) { - acpi_ps_free_op (pre_op); - pre_op = NULL; - } - - switch (status) { - case AE_OK: - break; - - - case AE_CTRL_TRANSFER: - - /* We are about to transfer to a called method. */ - - walk_state->prev_op = op; - walk_state->prev_arg_types = walk_state->arg_types; - return_ACPI_STATUS (status); - - - case AE_CTRL_END: - - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - - if (op) { - walk_state->op = op; - walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode); - walk_state->opcode = op->common.aml_opcode; - - status = walk_state->ascending_callback (walk_state); - status = acpi_ps_next_parse_state (walk_state, op, status); - - acpi_ps_complete_this_op (walk_state, op); - op = NULL; - } - status = AE_OK; - break; - - - case AE_CTRL_BREAK: - case AE_CTRL_CONTINUE: - - /* Pop off scopes until we find the While */ - - while (!op || (op->common.aml_opcode != AML_WHILE_OP)) { - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - } - - /* Close this iteration of the While loop */ - - walk_state->op = op; - walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode); - walk_state->opcode = op->common.aml_opcode; - - status = walk_state->ascending_callback (walk_state); - status = acpi_ps_next_parse_state (walk_state, op, status); - - acpi_ps_complete_this_op (walk_state, op); - op = NULL; - - status = AE_OK; - break; - - - case AE_CTRL_TERMINATE: - - status = AE_OK; - - /* Clean up */ - do { - if (op) { - acpi_ps_complete_this_op (walk_state, op); - } - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - - } while (op); - - return_ACPI_STATUS (status); - - - default: /* All other non-AE_OK status */ - - do { - if (op) { - acpi_ps_complete_this_op (walk_state, op); - } - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - - } while (op); - - - /* - * TBD: Cleanup parse ops on error - */ -#if 0 - if (op == NULL) { - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - } -#endif - walk_state->prev_op = op; - walk_state->prev_arg_types = walk_state->arg_types; - return_ACPI_STATUS (status); - } - - /* This scope complete? */ - - if (acpi_ps_has_completed_scope (parser_state)) { - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op)); - } - else { - op = NULL; - } - - } /* while parser_state->Aml */ - - - /* - * Complete the last Op (if not completed), and clear the scope stack. - * It is easily possible to end an AML "package" with an unbounded number - * of open scopes (such as when several ASL blocks are closed with - * sequential closing braces). We want to terminate each one cleanly. - */ - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "AML package complete at Op %p\n", op)); - do { - if (op) { - if (walk_state->ascending_callback != NULL) { - walk_state->op = op; - walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode); - walk_state->opcode = op->common.aml_opcode; - - status = walk_state->ascending_callback (walk_state); - status = acpi_ps_next_parse_state (walk_state, op, status); - if (status == AE_CTRL_PENDING) { - status = AE_OK; - goto close_this_op; - } - - if (status == AE_CTRL_TERMINATE) { - status = AE_OK; - - /* Clean up */ - do { - if (op) { - acpi_ps_complete_this_op (walk_state, op); - } - - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - - } while (op); - - return_ACPI_STATUS (status); - } - - else if (ACPI_FAILURE (status)) { - acpi_ps_complete_this_op (walk_state, op); - return_ACPI_STATUS (status); - } - } - - acpi_ps_complete_this_op (walk_state, op); - } - - acpi_ps_pop_scope (parser_state, &op, &walk_state->arg_types, - &walk_state->arg_count); - - } while (op); - - return_ACPI_STATUS (status); -} - - -/******************************************************************************* - * * FUNCTION: acpi_ps_parse_aml * * PARAMETERS: walk_state - Current state |