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-rw-r--r--drivers/acpi/acpica/psscope.c231
1 files changed, 231 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/psscope.c b/drivers/acpi/acpica/psscope.c
new file mode 100644
index 000000000..400f00163
--- /dev/null
+++ b/drivers/acpi/acpica/psscope.c
@@ -0,0 +1,231 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: psscope - Parser scope stack management routines
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acparser.h"
+
+#define _COMPONENT ACPI_PARSER
+ACPI_MODULE_NAME("psscope")
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_get_parent_scope
+ *
+ * PARAMETERS: parser_state - Current parser state object
+ *
+ * RETURN: Pointer to an Op object
+ *
+ * DESCRIPTION: Get parent of current op being parsed
+ *
+ ******************************************************************************/
+union acpi_parse_object *acpi_ps_get_parent_scope(struct acpi_parse_state
+ *parser_state)
+{
+
+ return (parser_state->scope->parse_scope.op);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_has_completed_scope
+ *
+ * PARAMETERS: parser_state - Current parser state object
+ *
+ * RETURN: Boolean, TRUE = scope completed.
+ *
+ * DESCRIPTION: Is parsing of current argument complete? Determined by
+ * 1) AML pointer is at or beyond the end of the scope
+ * 2) The scope argument count has reached zero.
+ *
+ ******************************************************************************/
+
+u8 acpi_ps_has_completed_scope(struct acpi_parse_state * parser_state)
+{
+
+ return ((u8)
+ ((parser_state->aml >= parser_state->scope->parse_scope.arg_end
+ || !parser_state->scope->parse_scope.arg_count)));
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_init_scope
+ *
+ * PARAMETERS: parser_state - Current parser state object
+ * root - the Root Node of this new scope
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Allocate and init a new scope object
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ps_init_scope(struct acpi_parse_state * parser_state,
+ union acpi_parse_object * root_op)
+{
+ union acpi_generic_state *scope;
+
+ ACPI_FUNCTION_TRACE_PTR(ps_init_scope, root_op);
+
+ scope = acpi_ut_create_generic_state();
+ if (!scope) {
+ return_ACPI_STATUS(AE_NO_MEMORY);
+ }
+
+ scope->common.descriptor_type = ACPI_DESC_TYPE_STATE_RPSCOPE;
+ scope->parse_scope.op = root_op;
+ scope->parse_scope.arg_count = ACPI_VAR_ARGS;
+ scope->parse_scope.arg_end = parser_state->aml_end;
+ scope->parse_scope.pkg_end = parser_state->aml_end;
+
+ parser_state->scope = scope;
+ parser_state->start_op = root_op;
+
+ return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_push_scope
+ *
+ * PARAMETERS: parser_state - Current parser state object
+ * op - Current op to be pushed
+ * remaining_args - List of args remaining
+ * arg_count - Fixed or variable number of args
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Push current op to begin parsing its argument
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ps_push_scope(struct acpi_parse_state *parser_state,
+ union acpi_parse_object *op,
+ u32 remaining_args, u32 arg_count)
+{
+ union acpi_generic_state *scope;
+
+ ACPI_FUNCTION_TRACE_PTR(ps_push_scope, op);
+
+ scope = acpi_ut_create_generic_state();
+ if (!scope) {
+ return_ACPI_STATUS(AE_NO_MEMORY);
+ }
+
+ scope->common.descriptor_type = ACPI_DESC_TYPE_STATE_PSCOPE;
+ scope->parse_scope.op = op;
+ scope->parse_scope.arg_list = remaining_args;
+ scope->parse_scope.arg_count = arg_count;
+ scope->parse_scope.pkg_end = parser_state->pkg_end;
+
+ /* Push onto scope stack */
+
+ acpi_ut_push_generic_state(&parser_state->scope, scope);
+
+ if (arg_count == ACPI_VAR_ARGS) {
+
+ /* Multiple arguments */
+
+ scope->parse_scope.arg_end = parser_state->pkg_end;
+ } else {
+ /* Single argument */
+
+ scope->parse_scope.arg_end = ACPI_TO_POINTER(ACPI_MAX_PTR);
+ }
+
+ return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_pop_scope
+ *
+ * PARAMETERS: parser_state - Current parser state object
+ * op - Where the popped op is returned
+ * arg_list - Where the popped "next argument" is
+ * returned
+ * arg_count - Count of objects in arg_list
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Return to parsing a previous op
+ *
+ ******************************************************************************/
+
+void
+acpi_ps_pop_scope(struct acpi_parse_state *parser_state,
+ union acpi_parse_object **op, u32 * arg_list, u32 * arg_count)
+{
+ union acpi_generic_state *scope = parser_state->scope;
+
+ ACPI_FUNCTION_TRACE(ps_pop_scope);
+
+ /* Only pop the scope if there is in fact a next scope */
+
+ if (scope->common.next) {
+ scope = acpi_ut_pop_generic_state(&parser_state->scope);
+
+ /* Return to parsing previous op */
+
+ *op = scope->parse_scope.op;
+ *arg_list = scope->parse_scope.arg_list;
+ *arg_count = scope->parse_scope.arg_count;
+ parser_state->pkg_end = scope->parse_scope.pkg_end;
+
+ /* All done with this scope state structure */
+
+ acpi_ut_delete_generic_state(scope);
+ } else {
+ /* Empty parse stack, prepare to fetch next opcode */
+
+ *op = NULL;
+ *arg_list = 0;
+ *arg_count = 0;
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
+ "Popped Op %p Args %X\n", *op, *arg_count));
+ return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_cleanup_scope
+ *
+ * PARAMETERS: parser_state - Current parser state object
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Destroy available list, remaining stack levels, and return
+ * root scope
+ *
+ ******************************************************************************/
+
+void acpi_ps_cleanup_scope(struct acpi_parse_state *parser_state)
+{
+ union acpi_generic_state *scope;
+
+ ACPI_FUNCTION_TRACE_PTR(ps_cleanup_scope, parser_state);
+
+ if (!parser_state) {
+ return_VOID;
+ }
+
+ /* Delete anything on the scope stack */
+
+ while (parser_state->scope) {
+ scope = acpi_ut_pop_generic_state(&parser_state->scope);
+ acpi_ut_delete_generic_state(scope);
+ }
+
+ return_VOID;
+}