1 files changed, 309 insertions, 0 deletions

diff --git a/drivers/acpi/parser/psutils.c b/drivers/acpi/parser/psutils.c
new file mode 100644
index 000000000000..b3597cb19f88
--- /dev/null
+++ b/drivers/acpi/parser/psutils.c
@@ -0,0 +1,309 @@
+/******************************************************************************
+ *
+ * Module Name: psutils - Parser miscellaneous utilities (Parser only)
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/acparser.h>
+#include <acpi/amlcode.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT          ACPI_PARSER
+         ACPI_MODULE_NAME    ("psutils")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_create_scope_op
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      scope_op
+ *
+ * DESCRIPTION: Create a Scope and associated namepath op with the root name
+ *
+ ******************************************************************************/
+
+union acpi_parse_object *
+acpi_ps_create_scope_op (
+        void)
+{
+        union acpi_parse_object         *scope_op;
+
+
+        scope_op = acpi_ps_alloc_op (AML_SCOPE_OP);
+        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:      Status
+ *
+ * DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on
+ *              opcode
+ *
+ ******************************************************************************/
+
+void
+acpi_ps_init_op (
+        union acpi_parse_object         *op,
+        u16                             opcode)
+{
+        ACPI_FUNCTION_ENTRY ();
+
+
+        op->common.data_type = ACPI_DESC_TYPE_PARSER;
+        op->common.aml_opcode = opcode;
+
+        ACPI_DISASM_ONLY_MEMBERS (ACPI_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
+ *
+ * RETURN:      Pointer to the new Op.
+ *
+ * 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)
+{
+        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;
+        }
+        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_ut_acquire_from_cache (ACPI_MEM_LIST_PSNODE);
+        }
+        else {
+                /* Extended parseop */
+
+                op = acpi_ut_acquire_from_cache (ACPI_MEM_LIST_PSNODE_EXT);
+        }
+
+        /* Initialize the Op */
+
+        if (op) {
+                acpi_ps_init_op (op, opcode);
+                op->common.flags = flags;
+        }
+
+        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");
+
+
+        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) {
+                acpi_ut_release_to_cache (ACPI_MEM_LIST_PSNODE, op);
+        }
+        else {
+                acpi_ut_release_to_cache (ACPI_MEM_LIST_PSNODE_EXT, op);
+        }
+}
+
+
+#ifdef ACPI_ENABLE_OBJECT_CACHE
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_delete_parse_cache
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Free all objects that are on the parse cache list.
+ *
+ ******************************************************************************/
+
+void
+acpi_ps_delete_parse_cache (
+        void)
+{
+        ACPI_FUNCTION_TRACE ("ps_delete_parse_cache");
+
+
+        acpi_ut_delete_generic_cache (ACPI_MEM_LIST_PSNODE);
+        acpi_ut_delete_generic_cache (ACPI_MEM_LIST_PSNODE_EXT);
+        return_VOID;
+}
+#endif
+
+
+/*******************************************************************************
+ *
+ * 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')));
+}
+
+
+/*
+ * Is "c" a namestring prefix character?
+ */
+u8
+acpi_ps_is_prefix_char (
+        u32                             c)
+{
+        return ((u8) (c == '\\' || c == '^'));
+}
+
+
+/*
+ * Get op's name (4-byte name segment) or 0 if unnamed
+ */
+#ifdef ACPI_FUTURE_USAGE
+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);
+}
+#endif  /*  ACPI_FUTURE_USAGE  */
+
+
+/*
+ * 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;
+}
+