ACPI_MODULE_NAME ("psparse")
-static u32 acpi_gbl_depth = 0;
-
-/* Local prototypes */
-
-static acpi_status
-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
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));
*
******************************************************************************/
-static acpi_status
+acpi_status
acpi_ps_complete_this_op (
struct acpi_walk_state *walk_state,
union acpi_parse_object *op)
*
******************************************************************************/
-static acpi_status
+acpi_status
acpi_ps_next_parse_state (
struct acpi_walk_state *walk_state,
union acpi_parse_object *op,
}
-/*******************************************************************************
- *
- * 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;
- 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);
-
- 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 */
-
- if (walk_state->pass_number <= ACPI_IMODE_LOAD_PASS1) {
- switch (op->common.aml_opcode) {
- case AML_IF_OP:
- case AML_ELSE_OP:
- case AML_WHILE_OP:
-
- /* Skip body of if/else/while in pass 1 */
-
- parser_state->aml = parser_state->pkg_end;
- walk_state->arg_count = 0;
- break;
-
- default:
- break;
- }
- }
-
- 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;
-
- 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--;
-
- /* Finished with pre_op */
-
- if (pre_op) {
- acpi_ps_free_op (pre_op);
- pre_op = NULL;
- }
-
- /* Close this Op (will result in parse subtree deletion) */
-
- status2 = acpi_ps_complete_this_op (walk_state, op);
- if (ACPI_FAILURE (status2)) {
- return_ACPI_STATUS (status2);
- }
- 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);
-
- 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_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);
-
- 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;
-
- /* Clean up */
- do {
- if (op) {
- status2 = acpi_ps_complete_this_op (walk_state, op);
- if (ACPI_FAILURE (status2)) {
- return_ACPI_STATUS (status2);
- }
- }
- 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) {
- status2 = acpi_ps_complete_this_op (walk_state, op);
- if (ACPI_FAILURE (status2)) {
- return_ACPI_STATUS (status2);
- }
- }
- 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) {
- status2 = acpi_ps_complete_this_op (walk_state, op);
- if (ACPI_FAILURE (status2)) {
- return_ACPI_STATUS (status2);
- }
- }
-
- 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)) {
- /* First error is most important */
-
- (void) acpi_ps_complete_this_op (walk_state, op);
- return_ACPI_STATUS (status);
- }
- }
-
- status2 = acpi_ps_complete_this_op (walk_state, op);
- if (ACPI_FAILURE (status2)) {
- return_ACPI_STATUS (status2);
- }
- }
-
- 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
projects / powerpc.git / blobdiff