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
25	depends on EARLY_PRINTK && USE_GENERIC_EARLY_PRINTK_8250
26	default y
27	help
28	  "8250/16550 and compatible serial early printk driver"
29	  If you say Y here, it will be possible to use a 8250/16550 serial
30	  port as the boot console.
31
32config USE_GENERIC_EARLY_PRINTK_8250
33	bool
34
35config CMDLINE_BOOL
36	bool "Built-in kernel command line"
37	default n
38	help
39	  For most systems, it is firmware or second stage bootloader that
40	  by default specifies the kernel command line options.  However,
41	  it might be necessary or advantageous to either override the
42	  default kernel command line or add a few extra options to it.
43	  For such cases, this option allows you to hardcode your own
44	  command line options directly into the kernel.  For that, you
45	  should choose 'Y' here, and fill in the extra boot arguments
46	  in CONFIG_CMDLINE.
47
48	  The built-in options will be concatenated to the default command
49	  line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
50	  command line will be ignored and replaced by the built-in string.
51
52	  Most MIPS systems will normally expect 'N' here and rely upon
53	  the command line from the firmware or the second-stage bootloader.
54
55config CMDLINE
56	string "Default kernel command string"
57	depends on CMDLINE_BOOL
58	default ""
59	help
60	  On some platforms, there is currently no way for the boot loader to
61	  pass arguments to the kernel.  For these platforms, and for the cases
62	  when you want to add some extra options to the command line or ignore
63	  the default command line, you can supply some command-line options at
64	  build time by entering them here.  In other cases you can specify
65	  kernel args so that you don't have to set them up in board prom
66	  initialization routines.
67
68	  For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE
69	  options.
70
71config CMDLINE_OVERRIDE
72	bool "Built-in command line overrides firmware arguments"
73	default n
74	depends on CMDLINE_BOOL
75	help
76	  By setting this option to 'Y' you will have your kernel ignore
77	  command line arguments from firmware or second stage bootloader.
78	  Instead, the built-in command line will be used exclusively.
79
80	  Normally, you will choose 'N' here.
81
82config SB1XXX_CORELIS
83	bool "Corelis Debugger"
84	depends on SIBYTE_SB1xxx_SOC
85	select DEBUG_INFO
86	help
87	  Select compile flags that produce code that can be processed by the
88	  Corelis mksym utility and UDB Emulator.
89
90config RUNTIME_DEBUG
91	bool "Enable run-time debugging"
92	depends on DEBUG_KERNEL
93	help
94	  If you say Y here, some debugging macros will do run-time checking.
95	  If you say N here, those macros will mostly turn to no-ops.  See
96	  arch/mips/include/asm/debug.h for debugging macros.
97	  If unsure, say N.
98
99config DEBUG_ZBOOT
100	bool "Enable compressed kernel support debugging"
101	depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
102	default n
103	help
104	  If you want to add compressed kernel support to a new board, and the
105	  board supports uart16550 compatible serial port, please select
106	  SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
107	  debug it.
108
109	  If your board doesn't support uart16550 compatible serial port, you
110	  can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
111	  debug it. for example, add a new serial port support just as
112	  arch/mips/boot/compressed/uart-16550.c does.
113
114	  After the compressed kernel support works, please disable this option
115	  to reduce the kernel image size and speed up the booting procedure a
116	  little.
117
118config SPINLOCK_TEST
119	bool "Enable spinlock timing tests in debugfs"
120	depends on DEBUG_FS
121	default n
122	help
123	  Add several files to the debugfs to test spinlock speed.
124
125endmenu
126