1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Include this file into a mainboard DSDT inside the PCI device
* "Northbridge Miscellaneous Control (Northbridge function 3)" and it
* will expose the temperature sensor of the processor as a thermal
* zone.
*
* Families 10 through 14 and some family 15 CPUs are supported.
*
* If, for example, the NB Misc. Control device is on 0:18.3, include
* the following:
*
* Scope (\_SB.PCI0) {
* Device (K10M) {
* Name (_ADR, 0x00180003)
* #include <soc/amd/common/acpi/thermal_zone.asl>
* }
* }
*
* Do not include this if the board is affected by erratum 319 as the
* thermal sensor of Socket F/AM2+ processors may be unreliable.
* (Erratum 319 affects AM2+ boards, AM3 and later should be fine)
*/
#ifndef K10TEMP_HOT_OFFSET
# define K10TEMP_HOT_OFFSET 50
#endif
#define K10TEMP_KELVIN_OFFSET 2732
#define K10TEMP_TLIMIT_OFFSET 520
OperationRegion (TCFG, PCI_Config, 0x64, 0x4)
Field (TCFG, ByteAcc, NoLock, Preserve) {
HTCE, 1, /* Hardware thermal control enable */
, 15,
TLMT, 7, /* (LimitTmp - 52) / 0.5 */
, 9,
}
OperationRegion (TCTL, PCI_Config, 0xa4, 0x4)
Field (TCTL, ByteAcc, NoLock, Preserve) {
, 21,
TNOW, 11, /* CurTmp / 0.125 */
}
ThermalZone (TZ00) {
Name (_STR, Unicode ("AMD CPU Core Thermal Sensor"))
Method (_STA) {
If (HTCE == 1) {
Return (0x0F)
}
Return (0)
}
Method (_TMP) { /* Current temp in tenths degree Kelvin. */
Local0 = TNOW * 10
Local0 >>= 3
Return (Local0 + K10TEMP_KELVIN_OFFSET)
}
/*
* TLMT indicates threshold where HTC become active. That is the processor will limit
* P-State and power consumption in order to cool down.
*/
Method (_PSV) { /* Passive temp in tenths degree Kelvin. */
Local0 = TLMT * 10
Local0 >>= 1
Local0 += K10TEMP_TLIMIT_OFFSET
Return (Local0 + K10TEMP_KELVIN_OFFSET)
}
Method (_HOT) { /* Hot temp in tenths degree Kelvin. */
Return (_PSV + K10TEMP_HOT_OFFSET)
}
Method (_CRT) { /* Critical temp in tenths degree Kelvin. */
Return (_HOT + K10TEMP_HOT_OFFSET)
}
}
|
