3 source "lib/Kconfig.debug"
5 # RMK wants arm kernels compiled with frame pointers so hardwire this to y.
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 ;).
13 If you say N here, the resulting kernel will be slightly smaller and
14 faster. However, when a problem occurs with the kernel, the
15 information that is reported is severely limited. Most people
19 bool "Verbose user fault messages"
21 When a user program crashes due to an exception, the kernel can
22 print a brief message explaining what the problem was. This is
23 sometimes helpful for debugging but serves no purpose on a
24 production system. Most people should say N here.
26 In addition, you need to pass user_debug=N on the kernel command
27 line to enable this feature. N consists of the sum of:
29 1 - undefined instruction events
31 4 - invalid data aborts
36 bool "Verbose kernel error messages"
37 depends on DEBUG_KERNEL
39 This option controls verbose debugging information which can be
40 printed when the kernel detects an internal error. This debugging
41 information is useful to kernel hackers when tracking down problems,
42 but mostly meaningless to other people. It's safe to say Y unless
43 you are concerned with the code size or don't want to see these
46 config DEBUG_STACK_USAGE
47 bool "Enable stack utilization instrumentation"
48 depends on DEBUG_KERNEL
50 Enables the display of the minimum amount of free stack which each
51 task has ever had available in the sysrq-T output.
53 # These options are only for real kernel hackers who want to get their hands dirty.
55 bool "Kernel low-level debugging functions"
56 depends on DEBUG_KERNEL
58 Say Y here to include definitions of printascii, printch, printhex
59 in the kernel. This is helpful if you are debugging code that
60 executes before the console is initialized.
63 bool "Kernel low-level debugging via EmbeddedICE DCC channel"
66 Say Y here if you want the debug print routines to direct their
67 output to the EmbeddedICE macrocell's DCC channel using
68 co-processor 14. This is known to work on the ARM9 style ICE
71 It does include a timeout to ensure that the system does not
72 totally freeze when there is nothing connected to read.
74 config DEBUG_DC21285_PORT
75 bool "Kernel low-level debugging messages via footbridge serial port"
76 depends on DEBUG_LL && FOOTBRIDGE
78 Say Y here if you want the debug print routines to direct their
79 output to the serial port in the DC21285 (Footbridge). Saying N
80 will cause the debug messages to appear on the first 16550
83 config DEBUG_CLPS711X_UART2
84 bool "Kernel low-level debugging messages via UART2"
85 depends on DEBUG_LL && ARCH_CLPS711X
87 Say Y here if you want the debug print routines to direct their
88 output to the second serial port on these devices. Saying N will
89 cause the debug messages to appear on the first serial port.
92 depends on DEBUG_LL && PLAT_S3C
93 bool "Kernel low-level debugging messages via S3C UART"
95 Say Y here if you want debug print routines to go to one of the
96 S3C internal UARTs. The chosen UART must have been configured
101 int "S3C UART to use for low-level debug"
104 Choice for UART for kernel low-level using S3C UARTS,
105 should be between zero and two. The port must have been
106 initialised by the boot-loader before use.
108 The uncompressor code port configuration is now handled
109 by CONFIG_S3C_LOWLEVEL_UART_PORT.