Root/arch/mips/Kconfig.debug

Source at commit 694c7fbe86b8a9c91392e505afcb9fcfc91deccc created 11 years 6 months ago.
By Maarten ter Huurne, MIPS: JZ4740: Add cpufreq support
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 EXPERT
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 EARLY_PRINTK_8250
24    bool "8250/16550 and compatible serial early printk driver"
25    depends on EARLY_PRINTK
26    default n
27    help
28      If you say Y here, it will be possible to use a 8250/16550 serial
29      port as the boot console.
30
31config CMDLINE_BOOL
32    bool "Built-in kernel command line"
33    default n
34    help
35      For most systems, it is firmware or second stage bootloader that
36      by default specifies the kernel command line options. However,
37      it might be necessary or advantageous to either override the
38      default kernel command line or add a few extra options to it.
39      For such cases, this option allows you to hardcode your own
40      command line options directly into the kernel. For that, you
41      should choose 'Y' here, and fill in the extra boot arguments
42      in CONFIG_CMDLINE.
43
44      The built-in options will be concatenated to the default command
45      line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
46      command line will be ignored and replaced by the built-in string.
47
48      Most MIPS systems will normally expect 'N' here and rely upon
49      the command line from the firmware or the second-stage bootloader.
50
51config CMDLINE
52    string "Default kernel command string"
53    depends on CMDLINE_BOOL
54    default ""
55    help
56      On some platforms, there is currently no way for the boot loader to
57      pass arguments to the kernel. For these platforms, and for the cases
58      when you want to add some extra options to the command line or ignore
59      the default command line, you can supply some command-line options at
60      build time by entering them here. In other cases you can specify
61      kernel args so that you don't have to set them up in board prom
62      initialization routines.
63
64      For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE
65      options.
66
67config CMDLINE_OVERRIDE
68    bool "Built-in command line overrides firmware arguments"
69    default n
70    depends on CMDLINE_BOOL
71    help
72      By setting this option to 'Y' you will have your kernel ignore
73      command line arguments from firmware or second stage bootloader.
74      Instead, the built-in command line will be used exclusively.
75
76      Normally, you will choose 'N' here.
77
78config SMTC_IDLE_HOOK_DEBUG
79    bool "Enable additional debug checks before going into CPU idle loop"
80    depends on DEBUG_KERNEL && MIPS_MT_SMTC
81    help
82      This option enables Enable additional debug checks before going into
83      CPU idle loop. For details on these checks, see
84      arch/mips/kernel/smtc.c. This debugging option result in significant
85      overhead so should be disabled in production kernels.
86
87config SB1XXX_CORELIS
88    bool "Corelis Debugger"
89    depends on SIBYTE_SB1xxx_SOC
90    select DEBUG_INFO
91    help
92      Select compile flags that produce code that can be processed by the
93      Corelis mksym utility and UDB Emulator.
94
95config RUNTIME_DEBUG
96    bool "Enable run-time debugging"
97    depends on DEBUG_KERNEL
98    help
99      If you say Y here, some debugging macros will do run-time checking.
100      If you say N here, those macros will mostly turn to no-ops. See
101      arch/mips/include/asm/debug.h for debugging macros.
102      If unsure, say N.
103
104config DEBUG_ZBOOT
105    bool "Enable compressed kernel support debugging"
106    depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
107    default n
108    help
109      If you want to add compressed kernel support to a new board, and the
110      board supports uart16550 compatible serial port, please select
111      SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
112      debug it.
113
114      If your board doesn't support uart16550 compatible serial port, you
115      can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
116      debug it. for example, add a new serial port support just as
117      arch/mips/boot/compressed/uart-16550.c does.
118
119      After the compressed kernel support works, please disable this option
120      to reduce the kernel image size and speed up the booting procedure a
121      little.
122
123config SPINLOCK_TEST
124    bool "Enable spinlock timing tests in debugfs"
125    depends on DEBUG_FS
126    default n
127    help
128      Add several files to the debugfs to test spinlock speed.
129
130endmenu
131

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