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Commit | Line | Data |
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1da177e4 LT |
1 | menu "Kernel hacking" |
2 | ||
192ef366 RB |
3 | config TRACE_IRQFLAGS_SUPPORT |
4 | bool | |
5 | default y | |
6 | ||
1da177e4 LT |
7 | source "lib/Kconfig.debug" |
8 | ||
4dd92e15 | 9 | config EARLY_PRINTK |
6a108a14 | 10 | bool "Early printk" if EXPERT |
4dd92e15 RB |
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 | ||
7cd93b89 YY |
23 | config 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 | ||
6acc7d48 DV |
31 | config 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 | ||
1da177e4 LT |
51 | config CMDLINE |
52 | string "Default kernel command string" | |
6acc7d48 | 53 | depends on CMDLINE_BOOL |
1da177e4 LT |
54 | default "" |
55 | help | |
3e7f9b82 | 56 | On some platforms, there is currently no way for the boot loader to |
6acc7d48 DV |
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 | ||
67 | config CMDLINE_OVERRIDE | |
6b2aac42 | 68 | bool "Built-in command line overrides firmware arguments" |
6acc7d48 DV |
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. | |
1da177e4 | 77 | |
9349075a | 78 | config SMTC_IDLE_HOOK_DEBUG |
c68644d3 RB |
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 | ||
1da177e4 LT |
87 | config 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 | ||
95 | config 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 | |
00ace207 | 101 | arch/mips/include/asm/debug.h for debugging macros. |
1da177e4 LT |
102 | If unsure, say N. |
103 | ||
f86a69b1 WZ |
104 | config 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 | ||
bba90760 DD |
123 | config 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 | ||
1da177e4 | 130 | endmenu |