| menu "Kernel hacking" | |
| config TRACE_IRQFLAGS_SUPPORT | |
| bool | |
| default y | |
| source "lib/Kconfig.debug" | |
| config EARLY_PRINTK | |
| bool "Early printk" if EXPERT | |
| depends on SYS_HAS_EARLY_PRINTK | |
| default y | |
| help | |
| This option enables special console drivers which allow the kernel | |
| to print messages very early in the bootup process. | |
| This is useful for kernel debugging when your machine crashes very | |
| early before the console code is initialized. For normal operation, | |
| it is not recommended because it looks ugly on some machines and | |
| doesn't cooperate with an X server. You should normally say N here, | |
| unless you want to debug such a crash. | |
| config CMDLINE_BOOL | |
| bool "Built-in kernel command line" | |
| default n | |
| help | |
| For most systems, it is firmware or second stage bootloader that | |
| by default specifies the kernel command line options. However, | |
| it might be necessary or advantageous to either override the | |
| default kernel command line or add a few extra options to it. | |
| For such cases, this option allows you to hardcode your own | |
| command line options directly into the kernel. For that, you | |
| should choose 'Y' here, and fill in the extra boot arguments | |
| in CONFIG_CMDLINE. | |
| The built-in options will be concatenated to the default command | |
| line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default | |
| command line will be ignored and replaced by the built-in string. | |
| Most MIPS systems will normally expect 'N' here and rely upon | |
| the command line from the firmware or the second-stage bootloader. | |
| config CMDLINE | |
| string "Default kernel command string" | |
| depends on CMDLINE_BOOL | |
| default "" | |
| help | |
| On some platforms, there is currently no way for the boot loader to | |
| pass arguments to the kernel. For these platforms, and for the cases | |
| when you want to add some extra options to the command line or ignore | |
| the default command line, you can supply some command-line options at | |
| build time by entering them here. In other cases you can specify | |
| kernel args so that you don't have to set them up in board prom | |
| initialization routines. | |
| For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE | |
| options. | |
| config CMDLINE_OVERRIDE | |
| bool "Built-in command line overrides firware arguments" | |
| default n | |
| depends on CMDLINE_BOOL | |
| help | |
| By setting this option to 'Y' you will have your kernel ignore | |
| command line arguments from firmware or second stage bootloader. | |
| Instead, the built-in command line will be used exclusively. | |
| Normally, you will choose 'N' here. | |
| config DEBUG_STACKOVERFLOW | |
| bool "Check for stack overflows" | |
| depends on DEBUG_KERNEL | |
| help | |
| This option will cause messages to be printed if free stack space | |
| drops below a certain limit(2GB on MIPS). The debugging option | |
| provides another way to check stack overflow happened on kernel mode | |
| stack usually caused by nested interruption. | |
| config DEBUG_STACK_USAGE | |
| bool "Enable stack utilization instrumentation" | |
| depends on DEBUG_KERNEL | |
| help | |
| Enables the display of the minimum amount of free stack which each | |
| task has ever had available in the sysrq-T and sysrq-P debug output. | |
| This option will slow down process creation somewhat. | |
| config SMTC_IDLE_HOOK_DEBUG | |
| bool "Enable additional debug checks before going into CPU idle loop" | |
| depends on DEBUG_KERNEL && MIPS_MT_SMTC | |
| help | |
| This option enables Enable additional debug checks before going into | |
| CPU idle loop. For details on these checks, see | |
| arch/mips/kernel/smtc.c. This debugging option result in significant | |
| overhead so should be disabled in production kernels. | |
| config SB1XXX_CORELIS | |
| bool "Corelis Debugger" | |
| depends on SIBYTE_SB1xxx_SOC | |
| select DEBUG_INFO | |
| help | |
| Select compile flags that produce code that can be processed by the | |
| Corelis mksym utility and UDB Emulator. | |
| config RUNTIME_DEBUG | |
| bool "Enable run-time debugging" | |
| depends on DEBUG_KERNEL | |
| help | |
| If you say Y here, some debugging macros will do run-time checking. | |
| If you say N here, those macros will mostly turn to no-ops. See | |
| arch/mips/include/asm/debug.h for debugging macros. | |
| If unsure, say N. | |
| config DEBUG_ZBOOT | |
| bool "Enable compressed kernel support debugging" | |
| depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT | |
| default n | |
| help | |
| If you want to add compressed kernel support to a new board, and the | |
| board supports uart16550 compatible serial port, please select | |
| SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to | |
| debug it. | |
| If your board doesn't support uart16550 compatible serial port, you | |
| can try to select SYS_SUPPORTS_ZBOOT and use the other methods to | |
| debug it. for example, add a new serial port support just as | |
| arch/mips/boot/compressed/uart-16550.c does. | |
| After the compressed kernel support works, please disable this option | |
| to reduce the kernel image size and speed up the booting procedure a | |
| little. | |
| config SPINLOCK_TEST | |
| bool "Enable spinlock timing tests in debugfs" | |
| depends on DEBUG_FS | |
| default n | |
| help | |
| Add several files to the debugfs to test spinlock speed. | |
| endmenu |