1 What: /sys/kernel/debug/dcc/.../read
2 Date: December 2022
3 Contact: Souradeep Chowdhury <quic_schow
4 Description:
5 This file is used to check the
6 hardware if it's ready to rece
7 A 'Y' here indicates dcc is re
8
9 What: /sys/kernel/debug/dcc/.../trig
10 Date: December 2022
11 Contact: Souradeep Chowdhury <quic_schow
12 Description:
13 This is the debugfs interface
14 triggers. The trigger can be i
15 to the file.
16
17 What: /sys/kernel/debug/dcc/.../conf
18 Date: December 2022
19 Contact: Souradeep Chowdhury <quic_schow
20 Description:
21 This file is used to reset the
22 a dcc driver to the default co
23 is written to the file, all th
24 stored in the driver gets remo
25 reconfigure addresses again.
26
27 What: /sys/kernel/debug/dcc/.../[lis
28 Date: December 2022
29 Contact: Souradeep Chowdhury <quic_schow
30 Description:
31 This stores the addresses of t
32 can be read in case of a hardw
33 software triggers. The input a
34 can be one of following dcc in
35 write, read-write, and loop ty
36 be configured sequentially and
37 manner; e.g. users can jump to
38 list y is configured and enabl
39 each type is as follows:
40
41 i) Read instruction
42
43 ::
44
45 echo R <addr> <n> <bus> >
46
47 where:
48
49 <addr>
50 The address to be read
51
52 <n>
53 The addresses word cou
54 Each word is 32 bits (
55 to 1.
56
57 <bus type>
58 The bus type, which ca
59 The default is 'ahb' i
60
61 ii) Write instruction
62
63 ::
64
65 echo W <addr> <n> <bus t
66
67 where:
68
69 <addr>
70 The address to be writ
71
72 <n>
73 The value to be writte
74
75 <bus type>
76 The bus type, which ca
77
78 iii) Read-write instruction
79
80 ::
81
82 echo RW <addr> <n> <mas
83
84 where:
85
86 <addr>
87 The address to be read
88
89 <n>
90 The value to be writte
91
92 <mask>
93 The value mask.
94
95 iv) Loop instruction
96
97 ::
98
99 echo L <loop count> <add
100
101 where:
102
103 <loop count>
104 Number of iterations
105
106 <address count>
107 total number of addres
108
109 <address>
110 Space-separated list o
111
112 What: /sys/kernel/debug/dcc/.../[lis
113 Date: December 2022
114 Contact: Souradeep Chowdhury <quic_schow
115 Description:
116 This debugfs interface is used
117 the dcc hardware. A file named
118 directory list number where us
119 the specific list by writing b
120 file.
121
122 On enabling the dcc, all the a
123 by the user for the correspond
124 into dcc sram which is read by
125 on manual or crash induced tri
126 be configured and enabled sequ
127 2 can only be enabled when lis
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