Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | menu "Kernel hacking" |
2 | ||
3 | source "lib/Kconfig.debug" | |
4 | ||
adf8b37b | 5 | # RMK wants arm kernels compiled with frame pointers or stack unwinding. |
1da177e4 LT |
6 | # If you know what you are doing and are willing to live without stack |
7 | # traces, you can get a slightly smaller kernel by setting this option to | |
8 | # n, but then RMK will have to kill you ;). | |
9 | config FRAME_POINTER | |
10 | bool | |
adf8b37b | 11 | default y if !ARM_UNWIND |
1da177e4 LT |
12 | help |
13 | If you say N here, the resulting kernel will be slightly smaller and | |
adf8b37b CM |
14 | faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled, |
15 | when a problem occurs with the kernel, the information that is | |
16 | reported is severely limited. | |
17 | ||
18 | config ARM_UNWIND | |
19 | bool "Enable stack unwinding support" | |
20 | depends on AEABI && EXPERIMENTAL | |
21 | default y | |
22 | help | |
23 | This option enables stack unwinding support in the kernel | |
24 | using the information automatically generated by the | |
25 | compiler. The resulting kernel image is slightly bigger but | |
26 | the performance is not affected. Currently, this feature | |
27 | only works with EABI compilers. If unsure say Y. | |
1da177e4 LT |
28 | |
29 | config DEBUG_USER | |
30 | bool "Verbose user fault messages" | |
31 | help | |
32 | When a user program crashes due to an exception, the kernel can | |
33 | print a brief message explaining what the problem was. This is | |
34 | sometimes helpful for debugging but serves no purpose on a | |
35 | production system. Most people should say N here. | |
36 | ||
37 | In addition, you need to pass user_debug=N on the kernel command | |
38 | line to enable this feature. N consists of the sum of: | |
39 | ||
40 | 1 - undefined instruction events | |
41 | 2 - system calls | |
42 | 4 - invalid data aborts | |
43 | 8 - SIGSEGV faults | |
44 | 16 - SIGBUS faults | |
45 | ||
1da177e4 LT |
46 | config DEBUG_ERRORS |
47 | bool "Verbose kernel error messages" | |
48 | depends on DEBUG_KERNEL | |
49 | help | |
50 | This option controls verbose debugging information which can be | |
51 | printed when the kernel detects an internal error. This debugging | |
52 | information is useful to kernel hackers when tracking down problems, | |
53 | but mostly meaningless to other people. It's safe to say Y unless | |
54 | you are concerned with the code size or don't want to see these | |
55 | messages. | |
56 | ||
ddf4e42c SH |
57 | config DEBUG_STACK_USAGE |
58 | bool "Enable stack utilization instrumentation" | |
59 | depends on DEBUG_KERNEL | |
60 | help | |
61 | Enables the display of the minimum amount of free stack which each | |
62 | task has ever had available in the sysrq-T output. | |
1da177e4 LT |
63 | |
64 | # These options are only for real kernel hackers who want to get their hands dirty. | |
65 | config DEBUG_LL | |
66 | bool "Kernel low-level debugging functions" | |
67 | depends on DEBUG_KERNEL | |
68 | help | |
35efb606 | 69 | Say Y here to include definitions of printascii, printch, printhex |
1da177e4 LT |
70 | in the kernel. This is helpful if you are debugging code that |
71 | executes before the console is initialized. | |
72 | ||
73 | config DEBUG_ICEDCC | |
74 | bool "Kernel low-level debugging via EmbeddedICE DCC channel" | |
75 | depends on DEBUG_LL | |
76 | help | |
77 | Say Y here if you want the debug print routines to direct their | |
78 | output to the EmbeddedICE macrocell's DCC channel using | |
79 | co-processor 14. This is known to work on the ARM9 style ICE | |
c633c3cf | 80 | channel and on the XScale with the PEEDI. |
1da177e4 LT |
81 | |
82 | It does include a timeout to ensure that the system does not | |
83 | totally freeze when there is nothing connected to read. | |
84 | ||
85 | config DEBUG_DC21285_PORT | |
86 | bool "Kernel low-level debugging messages via footbridge serial port" | |
87 | depends on DEBUG_LL && FOOTBRIDGE | |
88 | help | |
89 | Say Y here if you want the debug print routines to direct their | |
90 | output to the serial port in the DC21285 (Footbridge). Saying N | |
91 | will cause the debug messages to appear on the first 16550 | |
92 | serial port. | |
93 | ||
94 | config DEBUG_CLPS711X_UART2 | |
95 | bool "Kernel low-level debugging messages via UART2" | |
96 | depends on DEBUG_LL && ARCH_CLPS711X | |
97 | help | |
98 | Say Y here if you want the debug print routines to direct their | |
99 | output to the second serial port on these devices. Saying N will | |
100 | cause the debug messages to appear on the first serial port. | |
101 | ||
3ec20520 BD |
102 | config DEBUG_S3C_PORT |
103 | depends on DEBUG_LL && PLAT_S3C | |
104 | bool "Kernel low-level debugging messages via S3C UART" | |
1da177e4 LT |
105 | help |
106 | Say Y here if you want debug print routines to go to one of the | |
3ec20520 | 107 | S3C internal UARTs. The chosen UART must have been configured |
1da177e4 LT |
108 | before it is used. |
109 | ||
3ec20520 BD |
110 | config DEBUG_S3C_UART |
111 | depends on PLAT_S3C | |
112 | int "S3C UART to use for low-level debug" | |
1da177e4 LT |
113 | default "0" |
114 | help | |
3ec20520 | 115 | Choice for UART for kernel low-level using S3C UARTS, |
1da177e4 | 116 | should be between zero and two. The port must have been |
c41045a4 | 117 | initialised by the boot-loader before use. |
1da177e4 LT |
118 | |
119 | The uncompressor code port configuration is now handled | |
c7657846 | 120 | by CONFIG_S3C_LOWLEVEL_UART_PORT. |
1da177e4 LT |
121 | |
122 | endmenu |