1    /*
2     * Some or all of this work - Copyright (c) 2006 - 2021, Intel Corp.
3     * All rights reserved.
4     *
5     * Redistribution and use in source and binary forms, with or without modification,
6     * are permitted provided that the following conditions are met:
7     *
8     * Redistributions of source code must retain the above copyright notice,
9     * this list of conditions and the following disclaimer.
10     * Redistributions in binary form must reproduce the above copyright notice,
11     * this list of conditions and the following disclaimer in the documentation
12     * and/or other materials provided with the distribution.
13     * Neither the name of Intel Corporation nor the names of its contributors
14     * may be used to endorse or promote products derived from this software
15     * without specific prior written permission.
16     *
17     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18     * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20     * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
21     * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23     * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
25     * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
26     * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27     */
28    /*
29     * Bug 283:
30     *
31     * SUMMARY: When the Object parameter of Load is a Field the checksum
32     *          of the supplied SSDT should be verified
33     */
34    Device (D283)
35    {
36        Name (BUF0, Buffer (0x34)
37        {
38            /* 0000 */  0x53, 0x53, 0x44, 0x54, 0x34, 0x00, 0x00, 0x00,  // SSDT4...
39            /* 0008 */  0x02, 0xEB, 0x49, 0x6E, 0x74, 0x65, 0x6C, 0x00,  // ..Intel.
40            /* 0010 */  0x4D, 0x61, 0x6E, 0x79, 0x00, 0x00, 0x00, 0x00,  // Many....
41            /* 0018 */  0x01, 0x00, 0x00, 0x00, 0x49, 0x4E, 0x54, 0x4C,  // ....INTL
42            /* 0020 */  0x08, 0x12, 0x06, 0x20, 0x14, 0x0F, 0x5C, 0x53,  // ... ..\S
43            /* 0028 */  0x53, 0x30, 0x30, 0x00, 0xA4, 0x0D, 0x5C, 0x53,  // S00...\S
44            /* 0030 */  0x53, 0x30, 0x30, 0x00                           // S00.
45        })
46        OperationRegion (IST0, SystemMemory, 0x00, 0x34)
47        Field (IST0, ByteAcc, NoLock, Preserve)
48        {
49            RFU0,   416
50        }
51
52        Field (IST0, ByteAcc, NoLock, Preserve)
53        {
54            SIG,    32,
55            LENG,   32,
56            REV,    8,
57            SUM,    8
58        }
59
60        Method (TST0, 0, Serialized)
61        {
62            Name (HI0, 0x00)
63            RFU0 = BUF0 /* \D283.BUF0 */
64            /* Spoil the CheckSum */
65
66            Store ((SUM + 0x01), SUM) /* \D283.SUM_ */
67            /* "Incorrect checksum" ACPI warning is expected */
68
69            Load (RFU0, HI0) /* \D283.TST0.HI0_ */
70            CH03 (__METHOD__, 0x00, __LINE__, 0x00, 0x00)
71            Unload (HI0)
72            CH03 (__METHOD__, 0x00, __LINE__, 0x00, 0x00)
73        }
74    }
75
76    Method (M283, 0, NotSerialized)
77    {
78        \D283.TST0 ()
79    }
80