Root/arch/mips/Kconfig.debug

1menu "Kernel hacking"
2
3config TRACE_IRQFLAGS_SUPPORT
4    bool
5    default y
6
7source "lib/Kconfig.debug"
8
9config EARLY_PRINTK
10    bool "Early printk" if EMBEDDED
11    depends on SYS_HAS_EARLY_PRINTK
12    default y
13    help
14      This option enables special console drivers which allow the kernel
15      to print messages very early in the bootup process.
16
17      This is useful for kernel debugging when your machine crashes very
18      early before the console code is initialized. For normal operation,
19      it is not recommended because it looks ugly on some machines and
20      doesn't cooperate with an X server. You should normally say N here,
21      unless you want to debug such a crash.
22
23config CMDLINE_BOOL
24    bool "Built-in kernel command line"
25    default n
26    help
27      For most systems, it is firmware or second stage bootloader that
28      by default specifies the kernel command line options. However,
29      it might be necessary or advantageous to either override the
30      default kernel command line or add a few extra options to it.
31      For such cases, this option allows you to hardcode your own
32      command line options directly into the kernel. For that, you
33      should choose 'Y' here, and fill in the extra boot arguments
34      in CONFIG_CMDLINE.
35
36      The built-in options will be concatenated to the default command
37      line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
38      command line will be ignored and replaced by the built-in string.
39
40      Most MIPS systems will normally expect 'N' here and rely upon
41      the command line from the firmware or the second-stage bootloader.
42
43config CMDLINE
44    string "Default kernel command string"
45    depends on CMDLINE_BOOL
46    default ""
47    help
48      On some platforms, there is currently no way for the boot loader to
49      pass arguments to the kernel. For these platforms, and for the cases
50      when you want to add some extra options to the command line or ignore
51      the default command line, you can supply some command-line options at
52      build time by entering them here. In other cases you can specify
53      kernel args so that you don't have to set them up in board prom
54      initialization routines.
55
56      For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE
57      options.
58
59config CMDLINE_OVERRIDE
60    bool "Built-in command line overrides firware arguments"
61    default n
62    depends on CMDLINE_BOOL
63    help
64      By setting this option to 'Y' you will have your kernel ignore
65      command line arguments from firmware or second stage bootloader.
66      Instead, the built-in command line will be used exclusively.
67
68      Normally, you will choose 'N' here.
69
70config DEBUG_STACK_USAGE
71    bool "Enable stack utilization instrumentation"
72    depends on DEBUG_KERNEL
73    help
74      Enables the display of the minimum amount of free stack which each
75      task has ever had available in the sysrq-T and sysrq-P debug output.
76
77      This option will slow down process creation somewhat.
78
79config SMTC_IDLE_HOOK_DEBUG
80    bool "Enable additional debug checks before going into CPU idle loop"
81    depends on DEBUG_KERNEL && MIPS_MT_SMTC
82    help
83      This option enables Enable additional debug checks before going into
84      CPU idle loop. For details on these checks, see
85      arch/mips/kernel/smtc.c. This debugging option result in significant
86      overhead so should be disabled in production kernels.
87
88config SB1XXX_CORELIS
89    bool "Corelis Debugger"
90    depends on SIBYTE_SB1xxx_SOC
91    select DEBUG_INFO
92    help
93      Select compile flags that produce code that can be processed by the
94      Corelis mksym utility and UDB Emulator.
95
96config RUNTIME_DEBUG
97    bool "Enable run-time debugging"
98    depends on DEBUG_KERNEL
99    help
100      If you say Y here, some debugging macros will do run-time checking.
101      If you say N here, those macros will mostly turn to no-ops. See
102      arch/mips/include/asm/debug.h for debugging macros.
103      If unsure, say N.
104
105config DEBUG_ZBOOT
106    bool "Enable compressed kernel support debugging"
107    depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
108    default n
109    help
110      If you want to add compressed kernel support to a new board, and the
111      board supports uart16550 compatible serial port, please select
112      SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
113      debug it.
114
115      If your board doesn't support uart16550 compatible serial port, you
116      can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
117      debug it. for example, add a new serial port support just as
118      arch/mips/boot/compressed/uart-16550.c does.
119
120      After the compressed kernel support works, please disable this option
121      to reduce the kernel image size and speed up the booting procedure a
122      little.
123
124config SPINLOCK_TEST
125    bool "Enable spinlock timing tests in debugfs"
126    depends on DEBUG_FS
127    default n
128    help
129      Add several files to the debugfs to test spinlock speed.
130
131endmenu
132

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