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Diffstat (limited to 'arch/blackfin/Kconfig.debug')
-rw-r--r-- | arch/blackfin/Kconfig.debug | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/arch/blackfin/Kconfig.debug b/arch/blackfin/Kconfig.debug new file mode 100644 index 000000000000..59b87a483c68 --- /dev/null +++ b/arch/blackfin/Kconfig.debug | |||
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1 | menu "Kernel hacking" | ||
2 | |||
3 | source "lib/Kconfig.debug" | ||
4 | |||
5 | config DEBUG_MMRS | ||
6 | bool "Generate Blackfin MMR tree" | ||
7 | select DEBUG_FS | ||
8 | help | ||
9 | Create a tree of Blackfin MMRs via the debugfs tree. If | ||
10 | you enable this, you will find all MMRs laid out in the | ||
11 | /sys/kernel/debug/blackfin/ directory where you can read/write | ||
12 | MMRs directly from userspace. This is obviously just a debug | ||
13 | feature. | ||
14 | |||
15 | config DEBUG_HWERR | ||
16 | bool "Hardware error interrupt debugging" | ||
17 | depends on DEBUG_KERNEL | ||
18 | help | ||
19 | When enabled, the hardware error interrupt is never disabled, and | ||
20 | will happen immediately when an error condition occurs. This comes | ||
21 | at a slight cost in code size, but is necessary if you are getting | ||
22 | hardware error interrupts and need to know where they are coming | ||
23 | from. | ||
24 | |||
25 | config DEBUG_ICACHE_CHECK | ||
26 | bool "Check Instruction cache coherency" | ||
27 | depends on DEBUG_KERNEL | ||
28 | depends on DEBUG_HWERR | ||
29 | help | ||
30 | Say Y here if you are getting weird unexplained errors. This will | ||
31 | ensure that icache is what SDRAM says it should be by doing a | ||
32 | byte wise comparison between SDRAM and instruction cache. This | ||
33 | also relocates the irq_panic() function to L1 memory, (which is | ||
34 | un-cached). | ||
35 | |||
36 | config DEBUG_HUNT_FOR_ZERO | ||
37 | bool "Catch NULL pointer reads/writes" | ||
38 | default y | ||
39 | help | ||
40 | Say Y here to catch reads/writes to anywhere in the memory range | ||
41 | from 0x0000 - 0x0FFF (the first 4k) of memory. This is useful in | ||
42 | catching common programming errors such as NULL pointer dereferences. | ||
43 | |||
44 | Misbehaving applications will be killed (generate a SEGV) while the | ||
45 | kernel will trigger a panic. | ||
46 | |||
47 | Enabling this option will take up an extra entry in CPLB table. | ||
48 | Otherwise, there is no extra overhead. | ||
49 | |||
50 | config DEBUG_BFIN_HWTRACE_ON | ||
51 | bool "Turn on Blackfin's Hardware Trace" | ||
52 | default y | ||
53 | help | ||
54 | All Blackfins include a Trace Unit which stores a history of the last | ||
55 | 16 changes in program flow taken by the program sequencer. The history | ||
56 | allows the user to recreate the program sequencer’s recent path. This | ||
57 | can be handy when an application dies - we print out the execution | ||
58 | path of how it got to the offending instruction. | ||
59 | |||
60 | By turning this off, you may save a tiny amount of power. | ||
61 | |||
62 | choice | ||
63 | prompt "Omit loop Tracing" | ||
64 | default DEBUG_BFIN_HWTRACE_COMPRESSION_OFF | ||
65 | depends on DEBUG_BFIN_HWTRACE_ON | ||
66 | help | ||
67 | The trace buffer can be configured to omit recording of changes in | ||
68 | program flow that match either the last entry or one of the last | ||
69 | two entries. Omitting one of these entries from the record prevents | ||
70 | the trace buffer from overflowing because of any sort of loop (for, do | ||
71 | while, etc) in the program. | ||
72 | |||
73 | Because zero-overhead Hardware loops are not recorded in the trace buffer, | ||
74 | this feature can be used to prevent trace overflow from loops that | ||
75 | are nested four deep. | ||
76 | |||
77 | config DEBUG_BFIN_HWTRACE_COMPRESSION_OFF | ||
78 | bool "Trace all Loops" | ||
79 | help | ||
80 | The trace buffer records all changes of flow | ||
81 | |||
82 | config DEBUG_BFIN_HWTRACE_COMPRESSION_ONE | ||
83 | bool "Compress single-level loops" | ||
84 | help | ||
85 | The trace buffer does not record single loops - helpful if trace | ||
86 | is spinning on a while or do loop. | ||
87 | |||
88 | config DEBUG_BFIN_HWTRACE_COMPRESSION_TWO | ||
89 | bool "Compress two-level loops" | ||
90 | help | ||
91 | The trace buffer does not record loops two levels deep. Helpful if | ||
92 | the trace is spinning in a nested loop | ||
93 | |||
94 | endchoice | ||
95 | |||
96 | config DEBUG_BFIN_HWTRACE_COMPRESSION | ||
97 | int | ||
98 | depends on DEBUG_BFIN_HWTRACE_ON | ||
99 | default 0 if DEBUG_BFIN_HWTRACE_COMPRESSION_OFF | ||
100 | default 1 if DEBUG_BFIN_HWTRACE_COMPRESSION_ONE | ||
101 | default 2 if DEBUG_BFIN_HWTRACE_COMPRESSION_TWO | ||
102 | |||
103 | |||
104 | config DEBUG_BFIN_HWTRACE_EXPAND | ||
105 | bool "Expand Trace Buffer greater than 16 entries" | ||
106 | depends on DEBUG_BFIN_HWTRACE_ON | ||
107 | default n | ||
108 | help | ||
109 | By selecting this option, every time the 16 hardware entries in | ||
110 | the Blackfin's HW Trace buffer are full, the kernel will move them | ||
111 | into a software buffer, for dumping when there is an issue. This | ||
112 | has a great impact on performance, (an interrupt every 16 change of | ||
113 | flows) and should normally be turned off, except in those nasty | ||
114 | debugging sessions | ||
115 | |||
116 | config DEBUG_BFIN_HWTRACE_EXPAND_LEN | ||
117 | int "Size of Trace buffer (in power of 2k)" | ||
118 | range 0 4 | ||
119 | depends on DEBUG_BFIN_HWTRACE_EXPAND | ||
120 | default 1 | ||
121 | help | ||
122 | This sets the size of the software buffer that the trace information | ||
123 | is kept in. | ||
124 | 0 for (2^0) 1k, or 256 entries, | ||
125 | 1 for (2^1) 2k, or 512 entries, | ||
126 | 2 for (2^2) 4k, or 1024 entries, | ||
127 | 3 for (2^3) 8k, or 2048 entries, | ||
128 | 4 for (2^4) 16k, or 4096 entries | ||
129 | |||
130 | config DEBUG_BFIN_NO_KERN_HWTRACE | ||
131 | bool "Trace user apps (turn off hwtrace in kernel)" | ||
132 | depends on DEBUG_BFIN_HWTRACE_ON | ||
133 | default n | ||
134 | help | ||
135 | Some pieces of the kernel contain a lot of flow changes which can | ||
136 | quickly fill up the hardware trace buffer. When debugging crashes, | ||
137 | the hardware trace may indicate that the problem lies in kernel | ||
138 | space when in reality an application is buggy. | ||
139 | |||
140 | Say Y here to disable hardware tracing in some known "jumpy" pieces | ||
141 | of code so that the trace buffer will extend further back. | ||
142 | |||
143 | config EARLY_PRINTK | ||
144 | bool "Early printk" | ||
145 | default n | ||
146 | help | ||
147 | This option enables special console drivers which allow the kernel | ||
148 | to print messages very early in the bootup process. | ||
149 | |||
150 | This is useful for kernel debugging when your machine crashes very | ||
151 | early before the console code is initialized. After enabling this | ||
152 | feature, you must add "earlyprintk=serial,uart0,57600" to the | ||
153 | command line (bootargs). It is safe to say Y here in all cases, as | ||
154 | all of this lives in the init section and is thrown away after the | ||
155 | kernel boots completely. | ||
156 | |||
157 | config DUAL_CORE_TEST_MODULE | ||
158 | tristate "Dual Core Test Module" | ||
159 | depends on (BF561) | ||
160 | default n | ||
161 | help | ||
162 | Say Y here to build-in dual core test module for dual core test. | ||
163 | |||
164 | config CPLB_INFO | ||
165 | bool "Display the CPLB information" | ||
166 | help | ||
167 | Display the CPLB information. | ||
168 | |||
169 | config ACCESS_CHECK | ||
170 | bool "Check the user pointer address" | ||
171 | default y | ||
172 | help | ||
173 | Usually the pointer transfer from user space is checked to see if its | ||
174 | address is in the kernel space. | ||
175 | |||
176 | Say N here to disable that check to improve the performance. | ||
177 | |||
178 | endmenu | ||