1 files changed, 265 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/psscope.c b/drivers/acpi/acpica/psscope.c
new file mode 100644
index 000000000000..22929ca1ffe4
--- /dev/null
+++ b/drivers/acpi/acpica/psscope.c
@@ -0,0 +1,265 @@
+/******************************************************************************
+ *
+ * Module Name: psscope - Parser scope stack management routines
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, Intel Corp.
+ * 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/accommon.h>
+#include <acpi/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;
+}