v4.19.13 snapshot.
diff --git a/drivers/acpi/acpica/psutils.c b/drivers/acpi/acpica/psutils.c
new file mode 100644
index 0000000..ef8a580
--- /dev/null
+++ b/drivers/acpi/acpica/psutils.c
@@ -0,0 +1,214 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: psutils - Parser miscellaneous utilities (Parser only)
+ *
+ * Copyright (C) 2000 - 2018, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acparser.h"
+#include "amlcode.h"
+#include "acconvert.h"
+
+#define _COMPONENT ACPI_PARSER
+ACPI_MODULE_NAME("psutils")
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_create_scope_op
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: A new Scope object, null on failure
+ *
+ * DESCRIPTION: Create a Scope and associated namepath op with the root name
+ *
+ ******************************************************************************/
+union acpi_parse_object *acpi_ps_create_scope_op(u8 *aml)
+{
+ union acpi_parse_object *scope_op;
+
+ scope_op = acpi_ps_alloc_op(AML_SCOPE_OP, aml);
+ if (!scope_op) {
+ return (NULL);
+ }
+
+ scope_op->named.name = ACPI_ROOT_NAME;
+ return (scope_op);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_init_op
+ *
+ * PARAMETERS: op - A newly allocated Op object
+ * opcode - Opcode to store in the Op
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Initialize a parse (Op) object
+ *
+ ******************************************************************************/
+
+void acpi_ps_init_op(union acpi_parse_object *op, u16 opcode)
+{
+ ACPI_FUNCTION_ENTRY();
+
+ op->common.descriptor_type = ACPI_DESC_TYPE_PARSER;
+ op->common.aml_opcode = opcode;
+
+ ACPI_DISASM_ONLY_MEMBERS(acpi_ut_safe_strncpy(op->common.aml_op_name,
+ (acpi_ps_get_opcode_info
+ (opcode))->name,
+ sizeof(op->common.
+ aml_op_name)));
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_alloc_op
+ *
+ * PARAMETERS: opcode - Opcode that will be stored in the new Op
+ * aml - Address of the opcode
+ *
+ * RETURN: Pointer to the new Op, null on failure
+ *
+ * DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on
+ * opcode. A cache of opcodes is available for the pure
+ * GENERIC_OP, since this is by far the most commonly used.
+ *
+ ******************************************************************************/
+
+union acpi_parse_object *acpi_ps_alloc_op(u16 opcode, u8 *aml)
+{
+ union acpi_parse_object *op;
+ const struct acpi_opcode_info *op_info;
+ u8 flags = ACPI_PARSEOP_GENERIC;
+
+ ACPI_FUNCTION_ENTRY();
+
+ op_info = acpi_ps_get_opcode_info(opcode);
+
+ /* Determine type of parse_op required */
+
+ if (op_info->flags & AML_DEFER) {
+ flags = ACPI_PARSEOP_DEFERRED;
+ } else if (op_info->flags & AML_NAMED) {
+ flags = ACPI_PARSEOP_NAMED_OBJECT;
+ } else if (opcode == AML_INT_BYTELIST_OP) {
+ flags = ACPI_PARSEOP_BYTELIST;
+ }
+
+ /* Allocate the minimum required size object */
+
+ if (flags == ACPI_PARSEOP_GENERIC) {
+
+ /* The generic op (default) is by far the most common (16 to 1) */
+
+ op = acpi_os_acquire_object(acpi_gbl_ps_node_cache);
+ } else {
+ /* Extended parseop */
+
+ op = acpi_os_acquire_object(acpi_gbl_ps_node_ext_cache);
+ }
+
+ /* Initialize the Op */
+
+ if (op) {
+ acpi_ps_init_op(op, opcode);
+ op->common.aml = aml;
+ op->common.flags = flags;
+ ASL_CV_CLEAR_OP_COMMENTS(op);
+
+ if (opcode == AML_SCOPE_OP) {
+ acpi_gbl_current_scope = op;
+ }
+
+ if (acpi_gbl_capture_comments) {
+ ASL_CV_TRANSFER_COMMENTS(op);
+ }
+ }
+
+ return (op);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ps_free_op
+ *
+ * PARAMETERS: op - Op to be freed
+ *
+ * RETURN: None.
+ *
+ * DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list
+ * or actually free it.
+ *
+ ******************************************************************************/
+
+void acpi_ps_free_op(union acpi_parse_object *op)
+{
+ ACPI_FUNCTION_NAME(ps_free_op);
+
+ ASL_CV_CLEAR_OP_COMMENTS(op);
+ if (op->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
+ "Free retval op: %p\n", op));
+ }
+
+ if (op->common.flags & ACPI_PARSEOP_GENERIC) {
+ (void)acpi_os_release_object(acpi_gbl_ps_node_cache, op);
+ } else {
+ (void)acpi_os_release_object(acpi_gbl_ps_node_ext_cache, op);
+ }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: Utility functions
+ *
+ * DESCRIPTION: Low level character and object functions
+ *
+ ******************************************************************************/
+
+/*
+ * Is "c" a namestring lead character?
+ */
+u8 acpi_ps_is_leading_char(u32 c)
+{
+ return ((u8) (c == '_' || (c >= 'A' && c <= 'Z')));
+}
+
+/*
+ * Get op's name (4-byte name segment) or 0 if unnamed
+ */
+u32 acpi_ps_get_name(union acpi_parse_object * op)
+{
+
+ /* The "generic" object has no name associated with it */
+
+ if (op->common.flags & ACPI_PARSEOP_GENERIC) {
+ return (0);
+ }
+
+ /* Only the "Extended" parse objects have a name */
+
+ return (op->named.name);
+}
+
+/*
+ * Set op's name
+ */
+void acpi_ps_set_name(union acpi_parse_object *op, u32 name)
+{
+
+ /* The "generic" object has no name associated with it */
+
+ if (op->common.flags & ACPI_PARSEOP_GENERIC) {
+ return;
+ }
+
+ op->named.name = name;
+}