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-rw-r--r--libacpica/psxface.c340
1 files changed, 340 insertions, 0 deletions
diff --git a/libacpica/psxface.c b/libacpica/psxface.c
new file mode 100644
index 00000000..0460cc52
--- /dev/null
+++ b/libacpica/psxface.c
@@ -0,0 +1,340 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: psxface - Parser external interfaces
+ *
+ * Copyright (C) 2000 - 2021, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acparser.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "actables.h"
+#include "acnamesp.h"
+
+#define _COMPONENT ACPI_PARSER
+ACPI_MODULE_NAME("psxface")
+/* Local Prototypes */
+static void
+acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_debug_trace
+ *
+ * PARAMETERS: method_name - Valid ACPI name string
+ * debug_level - Optional level mask. 0 to use default
+ * debug_layer - Optional layer mask. 0 to use default
+ * flags - bit 1: one shot(1) or persistent(0)
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: External interface to enable debug tracing during control
+ * method execution
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_debug_trace(const char *name, u32 debug_level, u32 debug_layer, u32 flags)
+{
+ acpi_status status;
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ acpi_gbl_trace_method_name = name;
+ acpi_gbl_trace_flags = flags;
+ acpi_gbl_trace_dbg_level = debug_level;
+ acpi_gbl_trace_dbg_layer = debug_layer;
+ status = AE_OK;
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+ return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_execute_method
+ *
+ * PARAMETERS: info - Method info block, contains:
+ * node - Method Node to execute
+ * obj_desc - Method object
+ * parameters - List of parameters to pass to the method,
+ * terminated by NULL. Params itself may be
+ * NULL if no parameters are being passed.
+ * return_object - Where to put method's return value (if
+ * any). If NULL, no value is returned.
+ * parameter_type - Type of Parameter list
+ * return_object - Where to put method's return value (if
+ * any). If NULL, no value is returned.
+ * pass_number - Parse or execute pass
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Execute a control method
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
+{
+ acpi_status status;
+ union acpi_parse_object *op;
+ struct acpi_walk_state *walk_state;
+
+ ACPI_FUNCTION_TRACE(ps_execute_method);
+
+ /* Quick validation of DSDT header */
+
+ acpi_tb_check_dsdt_header();
+
+ /* Validate the Info and method Node */
+
+ if (!info || !info->node) {
+ return_ACPI_STATUS(AE_NULL_ENTRY);
+ }
+
+ /* Init for new method, wait on concurrency semaphore */
+
+ status =
+ acpi_ds_begin_method_execution(info->node, info->obj_desc, NULL);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * The caller "owns" the parameters, so give each one an extra reference
+ */
+ acpi_ps_update_parameter_list(info, REF_INCREMENT);
+
+ /*
+ * Execute the method. Performs parse simultaneously
+ */
+ ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
+ "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
+ info->node->name.ascii, info->node, info->obj_desc));
+
+ /* Create and init a Root Node */
+
+ op = acpi_ps_create_scope_op(info->obj_desc->method.aml_start);
+ if (!op) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /* Create and initialize a new walk state */
+
+ info->pass_number = ACPI_IMODE_EXECUTE;
+ walk_state =
+ acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
+ NULL, NULL);
+ if (!walk_state) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ status = acpi_ds_init_aml_walk(walk_state, op, info->node,
+ info->obj_desc->method.aml_start,
+ info->obj_desc->method.aml_length, info,
+ info->pass_number);
+ if (ACPI_FAILURE(status)) {
+ acpi_ds_delete_walk_state(walk_state);
+ goto cleanup;
+ }
+
+ walk_state->method_pathname = info->full_pathname;
+ walk_state->method_is_nested = FALSE;
+
+ if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) {
+ walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
+ }
+
+ /* Invoke an internal method if necessary */
+
+ if (info->obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) {
+ status =
+ info->obj_desc->method.dispatch.implementation(walk_state);
+ info->return_object = walk_state->return_desc;
+
+ /* Cleanup states */
+
+ acpi_ds_scope_stack_clear(walk_state);
+ acpi_ps_cleanup_scope(&walk_state->parser_state);
+ acpi_ds_terminate_control_method(walk_state->method_desc,
+ walk_state);
+ acpi_ds_delete_walk_state(walk_state);
+ goto cleanup;
+ }
+
+ /*
+ * Start method evaluation with an implicit return of zero.
+ * This is done for Windows compatibility.
+ */
+ if (acpi_gbl_enable_interpreter_slack) {
+ walk_state->implicit_return_obj =
+ acpi_ut_create_integer_object((u64)0);
+ if (!walk_state->implicit_return_obj) {
+ status = AE_NO_MEMORY;
+ acpi_ds_delete_walk_state(walk_state);
+ goto cleanup;
+ }
+ }
+
+ /* Parse the AML */
+
+ status = acpi_ps_parse_aml(walk_state);
+
+ /* walk_state was deleted by parse_aml */
+
+cleanup:
+ acpi_ps_delete_parse_tree(op);
+
+ /* Take away the extra reference that we gave the parameters above */
+
+ acpi_ps_update_parameter_list(info, REF_DECREMENT);
+
+ /* Exit now if error above */
+
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * If the method has returned an object, signal this to the caller with
+ * a control exception code
+ */
+ if (info->return_object) {
+ ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
+ info->return_object));
+ ACPI_DUMP_STACK_ENTRY(info->return_object);
+
+ status = AE_CTRL_RETURN_VALUE;
+ }
+
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_execute_table
+ *
+ * PARAMETERS: info - Method info block, contains:
+ * node - Node to where the is entered into the
+ * namespace
+ * obj_desc - Pseudo method object describing the AML
+ * code of the entire table
+ * pass_number - Parse or execute pass
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Execute a table
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ps_execute_table(struct acpi_evaluate_info *info)
+{
+ acpi_status status;
+ union acpi_parse_object *op = NULL;
+ struct acpi_walk_state *walk_state = NULL;
+
+ ACPI_FUNCTION_TRACE(ps_execute_table);
+
+ /* Create and init a Root Node */
+
+ op = acpi_ps_create_scope_op(info->obj_desc->method.aml_start);
+ if (!op) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /* Create and initialize a new walk state */
+
+ walk_state =
+ acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
+ NULL, NULL);
+ if (!walk_state) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ status = acpi_ds_init_aml_walk(walk_state, op, info->node,
+ info->obj_desc->method.aml_start,
+ info->obj_desc->method.aml_length, info,
+ info->pass_number);
+ if (ACPI_FAILURE(status)) {
+ goto cleanup;
+ }
+
+ walk_state->method_pathname = info->full_pathname;
+ walk_state->method_is_nested = FALSE;
+
+ if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) {
+ walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
+ }
+
+ /* Info->Node is the default location to load the table */
+
+ if (info->node && info->node != acpi_gbl_root_node) {
+ status =
+ acpi_ds_scope_stack_push(info->node, ACPI_TYPE_METHOD,
+ walk_state);
+ if (ACPI_FAILURE(status)) {
+ goto cleanup;
+ }
+ }
+
+ /*
+ * Parse the AML, walk_state will be deleted by parse_aml
+ */
+ acpi_ex_enter_interpreter();
+ status = acpi_ps_parse_aml(walk_state);
+ acpi_ex_exit_interpreter();
+ walk_state = NULL;
+
+cleanup:
+ if (walk_state) {
+ acpi_ds_delete_walk_state(walk_state);
+ }
+ if (op) {
+ acpi_ps_delete_parse_tree(op);
+ }
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_update_parameter_list
+ *
+ * PARAMETERS: info - See struct acpi_evaluate_info
+ * (Used: parameter_type and Parameters)
+ * action - Add or Remove reference
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Update reference count on all method parameter objects
+ *
+ ******************************************************************************/
+
+static void
+acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action)
+{
+ u32 i;
+
+ if (info->parameters) {
+
+ /* Update reference count for each parameter */
+
+ for (i = 0; info->parameters[i]; i++) {
+
+ /* Ignore errors, just do them all */
+
+ (void)acpi_ut_update_object_reference(info->
+ parameters[i],
+ action);
+ }
+ }
+}
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