diff options
Diffstat (limited to 'drivers/acpi/parser/psloop.c')
| -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 @@ */ /* - * Parse the AML and build an operation tree as most interpreters, - * like Perl, do. Parsing is done by hand rather than with a YACC - * generated parser to tightly constrain stack and dynamic memory - * usage. At the same time, parsing is kept flexible and the code - * fairly compact by parsing based on a list of AML opcode - * templates in aml_op_info[] + * Parse the AML and build an operation tree as most interpreters, (such as + * Perl) do. Parsing is done by hand rather than with a YACC generated parser + * to tightly constrain stack and dynamic memory usage. Parsing is kept + * flexible and the code fairly compact by parsing based on a list of AML + * opcode templates in aml_op_info[]. */ #include <acpi/acpi.h> @@ -60,766 +59,679 @@ ACPI_MODULE_NAME("psloop") static u32 acpi_gbl_depth = 0; +/* Local prototypes */ + +static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state); + +static acpi_status +acpi_ps_build_named_op(struct acpi_walk_state *walk_state, + u8 * aml_op_start, + union acpi_parse_object *unnamed_op, + union acpi_parse_object **op); + +static acpi_status +acpi_ps_create_op(struct acpi_walk_state *walk_state, + u8 * aml_op_start, union acpi_parse_object **new_op); + +static acpi_status +acpi_ps_get_arguments(struct acpi_walk_state *walk_state, + u8 * aml_op_start, union acpi_parse_object *op); + +static acpi_status +acpi_ps_complete_op(struct acpi_walk_state *walk_state, + union acpi_parse_object **op, acpi_status status); + +static acpi_status +acpi_ps_complete_final_op(struct acpi_walk_state *walk_state, + union acpi_parse_object *op, acpi_status status); + /******************************************************************************* * - * FUNCTION: acpi_ps_parse_loop + * FUNCTION: acpi_ps_get_aml_opcode * * PARAMETERS: walk_state - Current state * * RETURN: Status * - * DESCRIPTION: Parse AML (pointed to by the current parser state) and return - * a tree of ops. + * DESCRIPTION: Extract the next AML opcode from the input stream. * ******************************************************************************/ -acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) +static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state) { - acpi_status status = AE_OK; - acpi_status status2; - 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); + ACPI_FUNCTION_TRACE_PTR(ps_get_aml_opcode, walk_state); - if (walk_state->descending_callback == NULL) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } + walk_state->aml_offset = + (u32) ACPI_PTR_DIFF(walk_state->parser_state.aml, + walk_state->parser_state.aml_start); + walk_state->opcode = acpi_ps_peek_opcode(&(walk_state->parser_state)); - parser_state = &walk_state->parser_state; - walk_state->arg_types = 0; + /* + * 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); -#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) + 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; - if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) { + case AML_CLASS_UNKNOWN: - /* We are restarting a preempted control method */ + /* The opcode is unrecognized. Just skip unknown opcodes */ - 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_EXCEPTION((AE_INFO, status, - "Invoked method did not return a value")); + ACPI_ERROR((AE_INFO, + "Found unknown opcode %X at AML address %p offset %X, ignoring", + walk_state->opcode, walk_state->parser_state.aml, + walk_state->aml_offset)); - } - ACPI_EXCEPTION((AE_INFO, status, - "GetPredicate Failed")); - return_ACPI_STATUS(status); - } + ACPI_DUMP_BUFFER(walk_state->parser_state.aml, 128); - status = - acpi_ps_next_parse_state(walk_state, op, - status); - } + /* Assume one-byte bad opcode */ - 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) { + walk_state->parser_state.aml++; + return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); - /* We were in the middle of an op */ + default: - op = walk_state->prev_op; - walk_state->arg_types = walk_state->prev_arg_types; - } + /* Found opcode info, this is a normal opcode */ + + walk_state->parser_state.aml += + acpi_ps_get_opcode_size(walk_state->opcode); + walk_state->arg_types = walk_state->op_info->parse_args; + break; } -#endif - /* Iterative parsing loop, while there is more AML to process: */ + return_ACPI_STATUS(AE_OK); +} - while ((parser_state->aml < parser_state->aml_end) || (op)) { - aml_op_start = parser_state->aml; - if (!op) { +/******************************************************************************* + * + * FUNCTION: acpi_ps_build_named_op + * + * PARAMETERS: walk_state - Current state + * aml_op_start - Begin of named Op in AML + * unnamed_op - Early Op (not a named Op) + * Op - Returned Op + * + * RETURN: Status + * + * DESCRIPTION: Parse a named Op + * + ******************************************************************************/ - /* Get the next opcode from the AML stream */ +static acpi_status +acpi_ps_build_named_op(struct acpi_walk_state *walk_state, + u8 * aml_op_start, + union acpi_parse_object *unnamed_op, + union acpi_parse_object **op) +{ + acpi_status status = AE_OK; + union acpi_parse_object *arg = NULL; - walk_state->aml_offset = - (u32) ACPI_PTR_DIFF(parser_state->aml, - parser_state->aml_start); - walk_state->opcode = acpi_ps_peek_opcode(parser_state); + ACPI_FUNCTION_TRACE_PTR(ps_build_named_op, walk_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; + unnamed_op->common.value.arg = NULL; + unnamed_op->common.aml_opcode = walk_state->opcode; - case AML_CLASS_UNKNOWN: + /* + * 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, + &(walk_state->parser_state), + GET_CURRENT_ARG_TYPE(walk_state-> + arg_types), &arg); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } - /* The opcode is unrecognized. Just skip unknown opcodes */ + acpi_ps_append_arg(unnamed_op, arg); + INCREMENT_ARG_LIST(walk_state->arg_types); + } - ACPI_ERROR((AE_INFO, - "Found unknown opcode %X at AML address %p offset %X, ignoring", - walk_state->opcode, - parser_state->aml, - walk_state->aml_offset)); + /* + * Make sure that we found a NAME and didn't run out of arguments + */ + if (!GET_CURRENT_ARG_TYPE(walk_state->arg_types)) { + return_ACPI_STATUS(AE_AML_NO_OPERAND); + } - ACPI_DUMP_BUFFER(parser_state->aml, 128); + /* We know that this arg is a name, move to next arg */ - /* Assume one-byte bad opcode */ + INCREMENT_ARG_LIST(walk_state->arg_types); - parser_state->aml++; - continue; + /* + * Find the object. This will either insert the object into + * the namespace or simply look it up + */ + walk_state->op = NULL; - default: + status = walk_state->descending_callback(walk_state, op); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, "During name lookup/catalog")); + return_ACPI_STATUS(status); + } - /* Found opcode info, this is a normal opcode */ + if (!op) { + return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); + } - parser_state->aml += - acpi_ps_get_opcode_size(walk_state->opcode); - walk_state->arg_types = - walk_state->op_info->parse_args; - break; - } + status = acpi_ps_next_parse_state(walk_state, *op, status); + if (ACPI_FAILURE(status)) { + if (status == AE_CTRL_PENDING) { + return_ACPI_STATUS(AE_CTRL_PARSE_PENDING); + } + return_ACPI_STATUS(status); + } - /* Create Op structure and append to parent's argument list */ + acpi_ps_append_arg(*op, unnamed_op->common.value.arg); + acpi_gbl_depth++; - if (walk_state->op_info->flags & AML_NAMED) { + 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; + } - /* Allocate a new pre_op if necessary */ + return_ACPI_STATUS(AE_OK); +} - if (!pre_op) { - pre_op = - acpi_ps_alloc_op(walk_state-> - opcode); - if (!pre_op) { - status = AE_NO_MEMORY; - goto close_this_op; - } - } +/******************************************************************************* + * + * FUNCTION: acpi_ps_create_op + * + * PARAMETERS: walk_state - Current state + * aml_op_start - Op start in AML + * new_op - Returned Op + * + * RETURN: Status + * + * DESCRIPTION: Get Op from AML + * + ******************************************************************************/ - pre_op->common.value.arg = NULL; - pre_op->common.aml_opcode = walk_state->opcode; +static acpi_status +acpi_ps_create_op(struct acpi_walk_state *walk_state, + u8 * aml_op_start, union acpi_parse_object **new_op) +{ + acpi_status status = AE_OK; + union acpi_parse_object *op; + union acpi_parse_object *named_op = NULL; - /* - * 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_FUNCTION_TRACE_PTR(ps_create_op, walk_state); - acpi_ps_append_arg(pre_op, arg); - INCREMENT_ARG_LIST(walk_state-> - arg_types); - } + status = acpi_ps_get_aml_opcode(walk_state); + if (status == AE_CTRL_PARSE_CONTINUE) { + return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); + } - /* - * 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; - } + /* Create Op structure and append to parent's argument list */ - /* We know that this arg is a name, move to next arg */ + walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode); + op = acpi_ps_alloc_op(walk_state->opcode); + if (!op) { + return_ACPI_STATUS(AE_NO_MEMORY); + } - INCREMENT_ARG_LIST(walk_state->arg_types); + if (walk_state->op_info->flags & AML_NAMED) { + status = + acpi_ps_build_named_op(walk_state, aml_op_start, op, + &named_op); + acpi_ps_free_op(op); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } - /* - * Find the object. This will either insert the object into - * the namespace or simply look it up - */ - walk_state->op = NULL; + *new_op = named_op; + return_ACPI_STATUS(AE_OK); + } - status = - walk_state->descending_callback(walk_state, - &op); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "During name lookup/catalog")); - goto close_this_op; - } + /* Not a named opcode, just allocate Op and append to parent */ - if (!op) { - continue; - } + 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; + } - status = - acpi_ps_next_parse_state(walk_state, op, - status); - if (status == AE_CTRL_PENDING) { - status = AE_OK; - goto close_this_op; - } + acpi_ps_append_arg(acpi_ps_get_parent_scope + (&(walk_state->parser_state)), op); - if (ACPI_FAILURE(status)) { - goto close_this_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 = *new_op = 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 */ + 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_CTRL_PARSE_PENDING; + } + } - 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; - } + return_ACPI_STATUS(status); +} - 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; - } +/******************************************************************************* + * + * FUNCTION: acpi_ps_get_arguments + * + * PARAMETERS: walk_state - Current state + * aml_op_start - Op start in AML + * Op - Current Op + * + * RETURN: Status + * + * DESCRIPTION: Get arguments for passed Op. + * + ******************************************************************************/ - acpi_ps_append_arg(acpi_ps_get_parent_scope - (parser_state), op); +static acpi_status +acpi_ps_get_arguments(struct acpi_walk_state *walk_state, + u8 * aml_op_start, union acpi_parse_object *op) +{ + acpi_status status = AE_OK; + union acpi_parse_object *arg = NULL; - 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; + ACPI_FUNCTION_TRACE_PTR(ps_get_arguments, walk_state); - 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; - } + 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 */ - if (ACPI_FAILURE(status)) { - goto close_this_op; - } - } - } + /* Fill in constant or string argument directly */ - op->common.aml_offset = walk_state->aml_offset; + acpi_ps_get_next_simple_arg(&(walk_state->parser_state), + GET_CURRENT_ARG_TYPE(walk_state-> + arg_types), + op); + break; - if (walk_state->op_info) { - ACPI_DEBUG_PRINT((ACPI_DB_PARSE, - "Opcode %4.4X [%s] Op %p Aml %p AmlOffset %5.5X\n", - (u32) op->common.aml_opcode, - walk_state->op_info->name, op, - parser_state->aml, - op->common.aml_offset)); - } + case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ + + status = + acpi_ps_get_next_namepath(walk_state, + &(walk_state->parser_state), op, + 1); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); } + walk_state->arg_types = 0; + break; + + default: /* - * Start arg_count at zero because we don't know if there are - * any args yet + * Op is not a constant or string, append each argument to the Op */ - 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; + while (GET_CURRENT_ARG_TYPE(walk_state->arg_types) + && !walk_state->arg_count) { + walk_state->aml_offset = + (u32) ACPI_PTR_DIFF(walk_state->parser_state.aml, + walk_state->parser_state. + aml_start); - 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, + &(walk_state->parser_state), + GET_CURRENT_ARG_TYPE + (walk_state->arg_types), &arg); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } - 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); + } - if (arg) { - arg->common.aml_offset = - walk_state->aml_offset; - acpi_ps_append_arg(op, arg); - } - INCREMENT_ARG_LIST(walk_state-> - arg_types); - } + INCREMENT_ARG_LIST(walk_state->arg_types); + } - /* Special processing for certain opcodes */ + /* Special processing for certain opcodes */ - /* TBD (remove): Temporary mechanism to disable this code if needed */ + /* TBD (remove): Temporary mechanism to disable this code if needed */ #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE - if ((walk_state->pass_number <= - ACPI_IMODE_LOAD_PASS1) - && - ((walk_state-> - parse_flags & ACPI_PARSE_DISASSEMBLE) == - 0)) { - /* - * We want to skip If/Else/While constructs during Pass1 - * because we want to actually conditionally execute the - * code during Pass2. - * - * Except for disassembly, where we always want to - * walk the If/Else/While packages - */ - switch (op->common.aml_opcode) { - case AML_IF_OP: - case AML_ELSE_OP: - case AML_WHILE_OP: - - ACPI_DEBUG_PRINT((ACPI_DB_PARSE, - "Pass1: Skipping an If/Else/While body\n")); - - /* Skip body of if/else/while in pass 1 */ - - parser_state->aml = - parser_state->pkg_end; - walk_state->arg_count = 0; - break; - - default: - break; - } - } -#endif - 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->pass_number <= - ACPI_IMODE_LOAD_PASS2)) { - /* - * 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; + if ((walk_state->pass_number <= ACPI_IMODE_LOAD_PASS1) && + ((walk_state->parse_flags & ACPI_PARSE_DISASSEMBLE) == 0)) { + /* + * We want to skip If/Else/While constructs during Pass1 because we + * want to actually conditionally execute the code during Pass2. + * + * Except for disassembly, where we always want to walk the + * If/Else/While packages + */ + switch (op->common.aml_opcode) { + case AML_IF_OP: + case AML_ELSE_OP: + case AML_WHILE_OP: - case AML_WHILE_OP: + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, + "Pass1: Skipping an If/Else/While body\n")); - if (walk_state->control_state) { - walk_state->control_state-> - control.package_end = - parser_state->pkg_end; - } - break; + /* Skip body of if/else/while in pass 1 */ - default: + walk_state->parser_state.aml = + walk_state->parser_state.pkg_end; + walk_state->arg_count = 0; + break; - /* No action for all other opcodes */ - break; - } + default: break; } } +#endif - /* Check for arguments that need to be processed */ - - if (walk_state->arg_count) { + switch (op->common.aml_opcode) { + case AML_METHOD_OP: /* - * There are arguments (complex ones), push Op and - * prepare for argument + * 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 */ - 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; - } + op->named.data = walk_state->parser_state.aml; + op->named.length = (u32) + (walk_state->parser_state.pkg_end - + walk_state->parser_state.aml); - /* - * 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--; - } + /* Skip body of method */ - if (op->common.aml_opcode == AML_REGION_OP) { + walk_state->parser_state.aml = + walk_state->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->pass_number <= + ACPI_IMODE_LOAD_PASS2)) { /* - * 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. + * Skip parsing of Buffers and Packages because we don't have + * enough info in the first pass to parse them correctly. */ - op->named.length = - (u32) (parser_state->aml - op->named.data); - } - } + op->named.data = aml_op_start; + op->named.length = (u32) + (walk_state->parser_state.pkg_end - + aml_op_start); - 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); - } + /* Skip body */ - /* This op complete, notify the dispatcher */ + walk_state->parser_state.aml = + walk_state->parser_state.pkg_end; + walk_state->arg_count = 0; + } + break; - if (walk_state->ascending_callback != NULL) { - walk_state->op = op; - walk_state->opcode = op->common.aml_opcode; + case AML_WHILE_OP: - 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 (walk_state->control_state) { + walk_state->control_state->control.package_end = + walk_state->parser_state.pkg_end; } - } - - close_this_op: - /* - * Finished one argument of the containing scope - */ - parser_state->scope->parse_scope.arg_count--; + break; - /* Finished with pre_op */ + default: - if (pre_op) { - acpi_ps_free_op(pre_op); - pre_op = NULL; + /* No action for all other opcodes */ + break; } - /* Close this Op (will result in parse subtree deletion) */ + break; + } - status2 = acpi_ps_complete_this_op(walk_state, op); - if (ACPI_FAILURE(status2)) { - return_ACPI_STATUS(status2); - } - op = NULL; + return_ACPI_STATUS(AE_OK); +} - switch (status) { - case AE_OK: - break; +/******************************************************************************* + * + * FUNCTION: acpi_ps_complete_op + * + * PARAMETERS: walk_state - Current state + * Op - Returned Op + * Status - Parse status before complete Op + * + * RETURN: Status + * + * DESCRIPTION: Complete Op + * + ******************************************************************************/ - case AE_CTRL_TRANSFER: +static acpi_status +acpi_ps_complete_op(struct acpi_walk_state *walk_state, + union acpi_parse_object **op, acpi_status status) +{ + acpi_status status2; - /* We are about to transfer to a called method. */ + ACPI_FUNCTION_TRACE_PTR(ps_complete_op, walk_state); - walk_state->prev_op = op; - walk_state->prev_arg_types = walk_state->arg_types; - return_ACPI_STATUS(status); + /* + * Finished one argument of the containing scope + */ + walk_state->parser_state.scope->parse_scope.arg_count--; - case AE_CTRL_END: + /* Close this Op (will result in parse subtree deletion) */ - acpi_ps_pop_scope(parser_state, &op, - &walk_state->arg_types, - &walk_state->arg_count); + status2 = acpi_ps_complete_this_op(walk_state, *op); + if (ACPI_FAILURE(status2)) { + return_ACPI_STATUS(status2); + } - 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; + *op = NULL; - status = - walk_state->ascending_callback(walk_state); - status = - acpi_ps_next_parse_state(walk_state, op, - status); + switch (status) { + case AE_OK: + break; - status2 = - acpi_ps_complete_this_op(walk_state, op); - if (ACPI_FAILURE(status2)) { - return_ACPI_STATUS(status2); - } - op = NULL; - } - status = AE_OK; - break; + case AE_CTRL_TRANSFER: - case AE_CTRL_BREAK: - case AE_CTRL_CONTINUE: + /* We are about to transfer to a called method */ - /* Pop off scopes until we find the While */ + walk_state->prev_op = NULL; + walk_state->prev_arg_types = walk_state->arg_types; + return_ACPI_STATUS(status); - while (!op || (op->common.aml_opcode != AML_WHILE_OP)) { - acpi_ps_pop_scope(parser_state, &op, - &walk_state->arg_types, - &walk_state->arg_count); + case AE_CTRL_END: - if (op->common.aml_opcode != AML_WHILE_OP) { - status2 = - acpi_ds_result_stack_pop - (walk_state); - if (ACPI_FAILURE(status2)) { - return_ACPI_STATUS(status2); - } - } - } - - /* Close this iteration of the While loop */ + acpi_ps_pop_scope(&(walk_state->parser_state), op, + &walk_state->arg_types, + &walk_state->arg_count); - walk_state->op = op; + 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; + 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_next_parse_state(walk_state, *op, status); - status2 = acpi_ps_complete_this_op(walk_state, op); + status2 = acpi_ps_complete_this_op(walk_state, *op); if (ACPI_FAILURE(status2)) { return_ACPI_STATUS(status2); } - op = NULL; - - status = AE_OK; - break; + } - case AE_CTRL_TERMINATE: + status = AE_OK; + break; - status = AE_OK; + case AE_CTRL_BREAK: + case AE_CTRL_CONTINUE: - /* Clean up */ - do { - if (op) { - status2 = - acpi_ps_complete_this_op(walk_state, - op); - if (ACPI_FAILURE(status2)) { - return_ACPI_STATUS(status2); - } + /* Pop off scopes until we find the While */ - status2 = - acpi_ds_result_stack_pop - (walk_state); - if (ACPI_FAILURE(status2)) { - return_ACPI_STATUS(status2); - } + while (!(*op) || ((*op)->common.aml_opcode != AML_WHILE_OP)) { + acpi_ps_pop_scope(&(walk_state->parser_state), op, + &walk_state->arg_types, + &walk_state->arg_count); - acpi_ut_delete_generic_state - (acpi_ut_pop_generic_state - (&walk_state->control_state)); + if ((*op)->common.aml_opcode != AML_WHILE_OP) { + status2 = acpi_ds_result_stack_pop(walk_state); + if (ACPI_FAILURE(status2)) { + return_ACPI_STATUS(status2); } + } + } - acpi_ps_pop_scope(parser_state, &op, - &walk_state->arg_types, - &walk_state->arg_count); + /* Close this iteration of the While loop */ - } while (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; - return_ACPI_STATUS(status); + status = walk_state->ascending_callback(walk_state); + status = acpi_ps_next_parse_state(walk_state, *op, status); - default: /* All other non-AE_OK status */ + status2 = acpi_ps_complete_this_op(walk_state, *op); + if (ACPI_FAILURE(status2)) { + return_ACPI_STATUS(status2); + } - do { - if (op) { - status2 = - acpi_ps_complete_this_op(walk_state, - op); - if (ACPI_FAILURE(status2)) { - return_ACPI_STATUS(status2); - } + status = AE_OK; + break; + + case AE_CTRL_TERMINATE: + + /* Clean up */ + do { + if (*op) { + status2 = + acpi_ps_complete_this_op(walk_state, *op); + if (ACPI_FAILURE(status2)) { + return_ACPI_STATUS(status2); + } + status2 = acpi_ds_result_stack_pop(walk_state); + if (ACPI_FAILURE(status2)) { + return_ACPI_STATUS(status2); } - acpi_ps_pop_scope(parser_state, &op, - &walk_state->arg_types, - &walk_state->arg_count); + acpi_ut_delete_generic_state + (acpi_ut_pop_generic_state + (&walk_state->control_state)); + } - } while (op); + acpi_ps_pop_scope(&(walk_state->parser_state), op, + &walk_state->arg_types, + &walk_state->arg_count); - /* - * 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); + } while (*op); + + return_ACPI_STATUS(AE_OK); + + default: /* All other non-AE_OK status */ + + do { + if (*op) { + status2 = + acpi_ps_complete_this_op(walk_state, *op); + if (ACPI_FAILURE(status2)) { + return_ACPI_STATUS(status2); + } } -#endif - walk_state->prev_op = op; - walk_state->prev_arg_types = walk_state->arg_types; - return_ACPI_STATUS(status); - } - /* This scope complete? */ + acpi_ps_pop_scope(&(walk_state->parser_state), op, + &walk_state->arg_types, + &walk_state->arg_count); - if (acpi_ps_has_completed_scope(parser_state)) { - acpi_ps_pop_scope(parser_state, &op, + } while (*op); + +#if 0 + /* + * TBD: Cleanup parse ops on error + */ + if (*op == NULL) { + 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; } +#endif + walk_state->prev_op = NULL; + walk_state->prev_arg_types = walk_state->arg_types; + return_ACPI_STATUS(status); + } - } /* while parser_state->Aml */ + /* This scope complete? */ + + if (acpi_ps_has_completed_scope(&(walk_state->parser_state))) { + acpi_ps_pop_scope(&(walk_state->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; + } + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ps_complete_final_op + * + * PARAMETERS: walk_state - Current state + * Op - Current Op + * Status - Current parse status before complete last + * Op + * + * RETURN: Status + * + * DESCRIPTION: Complete last Op. + * + ******************************************************************************/ + +static acpi_status +acpi_ps_complete_final_op(struct acpi_walk_state *walk_state, + union acpi_parse_object *op, acpi_status status) +{ + acpi_status status2; + + ACPI_FUNCTION_TRACE_PTR(ps_complete_final_op, walk_state); /* * 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. + * sequential closing braces). We want to terminate each one cleanly. */ ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "AML package complete at Op %p\n", op)); @@ -838,8 +750,12 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) acpi_ps_next_parse_state(walk_state, op, status); if (status == AE_CTRL_PENDING) { - status = AE_OK; - goto close_this_op; + status = + acpi_ps_complete_op(walk_state, &op, + AE_OK); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } } if (status == AE_CTRL_TERMINATE) { @@ -858,7 +774,9 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) } } - acpi_ps_pop_scope(parser_state, + acpi_ps_pop_scope(& + (walk_state-> + parser_state), &op, &walk_state-> arg_types, @@ -887,10 +805,252 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) } } - acpi_ps_pop_scope(parser_state, &op, &walk_state->arg_types, + acpi_ps_pop_scope(&(walk_state->parser_state), &op, + &walk_state->arg_types, &walk_state->arg_count); } while (op); return_ACPI_STATUS(status); } + +/******************************************************************************* + * + * 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. + * + ******************************************************************************/ + +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 */ + 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_EXCEPTION((AE_INFO, status, + "Invoked method did not return a value")); + + } + + ACPI_EXCEPTION((AE_INFO, status, + "GetPredicate Failed")); + 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) { + status = + acpi_ps_create_op(walk_state, aml_op_start, &op); + if (ACPI_FAILURE(status)) { + if (status == AE_CTRL_PARSE_CONTINUE) { + continue; + } + + if (status == AE_CTRL_PARSE_PENDING) { + status = AE_OK; + } + + status = + acpi_ps_complete_op(walk_state, &op, + status); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + continue; + } + + 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 AmlOffset %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 */ + + status = + acpi_ps_get_arguments(walk_state, aml_op_start, op); + if (ACPI_FAILURE(status)) { + status = + acpi_ps_complete_op(walk_state, &op, + status); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + continue; + } + } + + /* 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)) { + status = + acpi_ps_complete_op(walk_state, &op, + status); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + continue; + } + + 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; + } + } + + status = acpi_ps_complete_op(walk_state, &op, status); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + } /* while parser_state->Aml */ + + status = acpi_ps_complete_final_op(walk_state, op, status); + return_ACPI_STATUS(status); +} |
