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_STACKOVERFLOW
71    bool "Check for stack overflows"
72    depends on DEBUG_KERNEL
73    help
74      This option will cause messages to be printed if free stack space
75      drops below a certain limit(2GB on MIPS). The debugging option
76      provides another way to check stack overflow happened on kernel mode
77      stack usually caused by nested interruption.
78
79config DEBUG_STACK_USAGE
80    bool "Enable stack utilization instrumentation"
81    depends on DEBUG_KERNEL
82    help
83      Enables the display of the minimum amount of free stack which each
84      task has ever had available in the sysrq-T and sysrq-P debug output.
85
86      This option will slow down process creation somewhat.
87
88config SMTC_IDLE_HOOK_DEBUG
89    bool "Enable additional debug checks before going into CPU idle loop"
90    depends on DEBUG_KERNEL && MIPS_MT_SMTC
91    help
92      This option enables Enable additional debug checks before going into
93      CPU idle loop. For details on these checks, see
94      arch/mips/kernel/smtc.c. This debugging option result in significant
95      overhead so should be disabled in production kernels.
96
97config SB1XXX_CORELIS
98    bool "Corelis Debugger"
99    depends on SIBYTE_SB1xxx_SOC
100    select DEBUG_INFO
101    help
102      Select compile flags that produce code that can be processed by the
103      Corelis mksym utility and UDB Emulator.
104
105config RUNTIME_DEBUG
106    bool "Enable run-time debugging"
107    depends on DEBUG_KERNEL
108    help
109      If you say Y here, some debugging macros will do run-time checking.
110      If you say N here, those macros will mostly turn to no-ops. See
111      arch/mips/include/asm/debug.h for debugging macros.
112      If unsure, say N.
113
114config DEBUG_ZBOOT
115    bool "Enable compressed kernel support debugging"
116    depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
117    default n
118    help
119      If you want to add compressed kernel support to a new board, and the
120      board supports uart16550 compatible serial port, please select
121      SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
122      debug it.
123
124      If your board doesn't support uart16550 compatible serial port, you
125      can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
126      debug it. for example, add a new serial port support just as
127      arch/mips/boot/compressed/uart-16550.c does.
128
129      After the compressed kernel support works, please disable this option
130      to reduce the kernel image size and speed up the booting procedure a
131      little.
132
133config SPINLOCK_TEST
134    bool "Enable spinlock timing tests in debugfs"
135    depends on DEBUG_FS
136    default n
137    help
138      Add several files to the debugfs to test spinlock speed.
139
140endmenu
141

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