1 files changed, 209 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/exstorob.c b/drivers/acpi/acpica/exstorob.c
new file mode 100644
index 000000000000..a48d580d71c2
--- /dev/null
+++ b/drivers/acpi/acpica/exstorob.c
@@ -0,0 +1,209 @@
+
+/******************************************************************************
+ *
+ * Module Name: exstorob - AML Interpreter object store support, store to object
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acinterp.h>
+
+#define _COMPONENT          ACPI_EXECUTER
+ACPI_MODULE_NAME("exstorob")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_store_buffer_to_buffer
+ *
+ * PARAMETERS:  source_desc         - Source object to copy
+ *              target_desc         - Destination object of the copy
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Copy a buffer object to another buffer object.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ex_store_buffer_to_buffer(union acpi_operand_object *source_desc,
+                               union acpi_operand_object *target_desc)
+{
+        u32 length;
+        u8 *buffer;
+
+        ACPI_FUNCTION_TRACE_PTR(ex_store_buffer_to_buffer, source_desc);
+
+        /* We know that source_desc is a buffer by now */
+
+        buffer = ACPI_CAST_PTR(u8, source_desc->buffer.pointer);
+        length = source_desc->buffer.length;
+
+        /*
+         * If target is a buffer of length zero or is a static buffer,
+         * allocate a new buffer of the proper length
+         */
+        if ((target_desc->buffer.length == 0) ||
+            (target_desc->common.flags & AOPOBJ_STATIC_POINTER)) {
+                target_desc->buffer.pointer = ACPI_ALLOCATE(length);
+                if (!target_desc->buffer.pointer) {
+                        return_ACPI_STATUS(AE_NO_MEMORY);
+                }
+
+                target_desc->buffer.length = length;
+        }
+
+        /* Copy source buffer to target buffer */
+
+        if (length <= target_desc->buffer.length) {
+
+                /* Clear existing buffer and copy in the new one */
+
+                ACPI_MEMSET(target_desc->buffer.pointer, 0,
+                            target_desc->buffer.length);
+                ACPI_MEMCPY(target_desc->buffer.pointer, buffer, length);
+
+#ifdef ACPI_OBSOLETE_BEHAVIOR
+                /*
+                 * NOTE: ACPI versions up to 3.0 specified that the buffer must be
+                 * truncated if the string is smaller than the buffer.  However, "other"
+                 * implementations of ACPI never did this and thus became the defacto
+                 * standard. ACPI 3.0_a changes this behavior such that the buffer
+                 * is no longer truncated.
+                 */
+
+                /*
+                 * OBSOLETE BEHAVIOR:
+                 * If the original source was a string, we must truncate the buffer,
+                 * according to the ACPI spec.  Integer-to-Buffer and Buffer-to-Buffer
+                 * copy must not truncate the original buffer.
+                 */
+                if (original_src_type == ACPI_TYPE_STRING) {
+
+                        /* Set the new length of the target */
+
+                        target_desc->buffer.length = length;
+                }
+#endif
+        } else {
+                /* Truncate the source, copy only what will fit */
+
+                ACPI_MEMCPY(target_desc->buffer.pointer, buffer,
+                            target_desc->buffer.length);
+
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                                  "Truncating source buffer from %X to %X\n",
+                                  length, target_desc->buffer.length));
+        }
+
+        /* Copy flags */
+
+        target_desc->buffer.flags = source_desc->buffer.flags;
+        target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
+        return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_store_string_to_string
+ *
+ * PARAMETERS:  source_desc         - Source object to copy
+ *              target_desc         - Destination object of the copy
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Copy a String object to another String object
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_store_string_to_string(union acpi_operand_object *source_desc,
+                               union acpi_operand_object *target_desc)
+{
+        u32 length;
+        u8 *buffer;
+
+        ACPI_FUNCTION_TRACE_PTR(ex_store_string_to_string, source_desc);
+
+        /* We know that source_desc is a string by now */
+
+        buffer = ACPI_CAST_PTR(u8, source_desc->string.pointer);
+        length = source_desc->string.length;
+
+        /*
+         * Replace existing string value if it will fit and the string
+         * pointer is not a static pointer (part of an ACPI table)
+         */
+        if ((length < target_desc->string.length) &&
+            (!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) {
+                /*
+                 * String will fit in existing non-static buffer.
+                 * Clear old string and copy in the new one
+                 */
+                ACPI_MEMSET(target_desc->string.pointer, 0,
+                            (acpi_size) target_desc->string.length + 1);
+                ACPI_MEMCPY(target_desc->string.pointer, buffer, length);
+        } else {
+                /*
+                 * Free the current buffer, then allocate a new buffer
+                 * large enough to hold the value
+                 */
+                if (target_desc->string.pointer &&
+                    (!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) {
+
+                        /* Only free if not a pointer into the DSDT */
+
+                        ACPI_FREE(target_desc->string.pointer);
+                }
+
+                target_desc->string.pointer = ACPI_ALLOCATE_ZEROED((acpi_size)
+                                                                   length + 1);
+                if (!target_desc->string.pointer) {
+                        return_ACPI_STATUS(AE_NO_MEMORY);
+                }
+
+                target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
+                ACPI_MEMCPY(target_desc->string.pointer, buffer, length);
+        }
+
+        /* Set the new target length */
+
+        target_desc->string.length = length;
+        return_ACPI_STATUS(AE_OK);
+}