Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-4.19 / f3cffe4d1a20208da9bf2c9cc0a973bf091eb160 / . / Documentation / hwmon / coretemp
blob: 25568f844804d7d5cc43560898251c85eca2c912 [file] [log] [blame]
Rudolf Marekd58ee052007-05-08 17:22:02 +0200[diff] [blame]1Kernel driver coretemp
2======================
3
4Supported chips:
5 * All Intel Core family
6 Prefix: 'coretemp'
Rudolf Marekeccfed42009-09-23 22:59:42 +0200[diff] [blame]7 CPUID: family 0x6, models 0xe (Pentium M DC), 0xf (Core 2 DC 65nm),
8 0x16 (Core 2 SC 65nm), 0x17 (Penryn 45nm),
Huaxu Wanfa08acd2009-09-23 22:59:43 +0200[diff] [blame]9 0x1a (Nehalem), 0x1c (Atom), 0x1e (Lynnfield)
Rudolf Marekd58ee052007-05-08 17:22:02 +0200[diff] [blame]10 Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual
11 Volume 3A: System Programming Guide
Rudolf Marekae770152008-01-18 00:50:04 +0100[diff] [blame]12 http://softwarecommunity.intel.com/Wiki/Mobility/720.htm
Rudolf Marekd58ee052007-05-08 17:22:02 +0200[diff] [blame]13
14Author: Rudolf Marek
15
16Description
17-----------
18
19This driver permits reading temperature sensor embedded inside Intel Core CPU.
20Temperature is measured in degrees Celsius and measurement resolution is
211 degree C. Valid temperatures are from 0 to TjMax degrees C, because
22the actual value of temperature register is in fact a delta from TjMax.
23
Chen Gongf3cffe42010-08-09 17:21:10 -0700[diff] [blame^]24Temperature known as TjMax is the maximum junction temperature of processor,
25which depends on the CPU model. See table below. At this temperature, protection
Rudolf Marekd58ee052007-05-08 17:22:02 +0200[diff] [blame]26mechanism will perform actions to forcibly cool down the processor. Alarm
27may be raised, if the temperature grows enough (more than TjMax) to trigger
28the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
29
30temp1_input - Core temperature (in millidegrees Celsius).
Rudolf Marek6369a2882008-01-18 00:42:54 +0100[diff] [blame]31temp1_max - All cooling devices should be turned on (on Core2).
32temp1_crit - Maximum junction temperature (in millidegrees Celsius).
Rudolf Marekd58ee052007-05-08 17:22:02 +0200[diff] [blame]33temp1_crit_alarm - Set when Out-of-spec bit is set, never clears.
34 Correct CPU operation is no longer guaranteed.
35temp1_label - Contains string "Core X", where X is processor
36 number.
37
38The TjMax temperature is set to 85 degrees C if undocumented model specific
39register (UMSR) 0xee has bit 30 set. If not the TjMax is 100 degrees C as
40(sometimes) documented in processor datasheet.
Chen Gongf3cffe42010-08-09 17:21:10 -0700[diff] [blame^]41
42Appendix A. Known TjMax lists (TBD):
43Some information comes from ark.intel.com
44
45Process Processor TjMax(C)
46
4732nm Core i3/i5/i7 Processors
48 i7 660UM/640/620, 640LM/620, 620M, 610E 105
49 i5 540UM/520/430, 540M/520/450/430 105
50 i3 330E, 370M/350/330 90 rPGA, 105 BGA
51 i3 330UM 105
52
5332nm Core i7 Extreme Processors
54 980X 100
55
5632nm Celeron Processors
57 U3400 105
58 P4505/P4500 90
59
6045nm Xeon Processors 5400 Quad-Core
61 X5492, X5482, X5472, X5470, X5460, X5450 85
62 E5472, E5462, E5450/40/30/20/10/05 85
63 L5408 95
64 L5430, L5420, L5410 70
65
6645nm Xeon Processors 5200 Dual-Core
67 X5282, X5272, X5270, X5260 90
68 E5240 90
69 E5205, E5220 70, 90
70 L5240 70
71 L5238, L5215 95
72
7345nm Atom Processors
74 D525/510/425/410 100
75 Z560/550/540/530P/530/520PT/520/515/510PT/510P 90
76 Z510/500 90
77 N475/470/455/450 100
78 N280/270 90
79 330/230 125
80
8145nm Core2 Processors
82 Solo ULV SU3500/3300 100
83 T9900/9800/9600/9550/9500/9400/9300/8300/8100 105
84 T6670/6500/6400 105
85 T6600 90
86 SU9600/9400/9300 105
87 SP9600/9400 105
88 SL9600/9400/9380/9300 105
89 P9700/9600/9500/8800/8700/8600/8400/7570 105
90 P7550/7450 90
91
9245nm Core2 Quad Processors
93 Q9100/9000 100
94
9545nm Core2 Extreme Processors
96 X9100/9000 105
97 QX9300 100
98
9945nm Core i3/i5/i7 Processors
100 i7 940XM/920 100
101 i7 840QM/820/740/720 100
102
10345nm Celeron Processors
104 SU2300 100
105 900 105
106
10765nm Core2 Duo Processors
108 Solo U2200, U2100 100
109 U7700/7600/7500 100
110 T7800/7700/7600/7500/7400/7300/7250/7200/7100 100
111 T5870/5670/5600/5550/5500/5470/5450/5300/5270 100
112 T5250 100
113 T5800/5750/5200 85
114 L7700/7500/7400/7300/7200 100
115
11665nm Core2 Extreme Processors
117 X7900/7800 100
118
11965nm Core Duo Processors
120 U2500/2400 100
121 T2700/2600/2450/2400/2350/2300E/2300/2250/2050 100
122 L2500/2400/2300 100
123
12465nm Core Solo Processors
125 U1500/1400/1300 100
126 T1400/1350/1300/1250 100
127
12865nm Xeon Processors 5000 Quad-Core
129 X5000 90-95
130 E5000 80
131 L5000 70
132 L5318 95
133
13465nm Xeon Processors 5000 Dual-Core
135 5080, 5063, 5060, 5050, 5030 80-90
136 5160, 5150, 5148, 5140, 5130, 5120, 5110 80
137 L5138 100
138
13965nm Celeron Processors
140 T1700/1600 100
141 560/550/540/530 100