diff options
Diffstat (limited to 'arch/mips/Kconfig.debug')
| -rw-r--r-- | arch/mips/Kconfig.debug | 135 |
1 files changed, 87 insertions, 48 deletions
diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug index fd7124c1b75..3a2b775e845 100644 --- a/arch/mips/Kconfig.debug +++ b/arch/mips/Kconfig.debug @@ -6,55 +6,78 @@ config TRACE_IRQFLAGS_SUPPORT source "lib/Kconfig.debug" -config CMDLINE - string "Default kernel command string" - default "" +config EARLY_PRINTK + bool "Early printk" if EXPERT + depends on SYS_HAS_EARLY_PRINTK + default y help - On some platforms, there is currently no way for the boot loader to - pass arguments to the kernel. For these platforms, 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. + This option enables special console drivers which allow the kernel + to print messages very early in the bootup process. -config DEBUG_STACK_USAGE - bool "Enable stack utilization instrumentation" - depends on DEBUG_KERNEL + 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 EARLY_PRINTK_8250 + bool + depends on EARLY_PRINTK && USE_GENERIC_EARLY_PRINTK_8250 + default y 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. + "8250/16550 and compatible serial early printk driver" + If you say Y here, it will be possible to use a 8250/16550 serial + port as the boot console. - This option will slow down process creation somewhat. +config USE_GENERIC_EARLY_PRINTK_8250 + bool -config SMTC_IDLE_HOOK_DEBUG - bool "Enable additional debug checks before going into CPU idle loop" - depends on DEBUG_KERNEL && MIPS_MT_SMTC +config CMDLINE_BOOL + bool "Built-in kernel command line" + default n 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 KGDB - bool "Remote GDB kernel debugging" - depends on DEBUG_KERNEL && SYS_SUPPORTS_KGDB - select DEBUG_INFO + 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 - If you say Y here, it will be possible to remotely debug the MIPS - kernel using gdb. This enlarges your kernel image disk size by - several megabytes and requires a machine with more than 16 MB, - better 32 MB RAM to avoid excessive linking time. This is only - useful for kernel hackers. If unsure, say N. + 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. -config SYS_SUPPORTS_KGDB - bool + For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE + options. -config GDB_CONSOLE - bool "Console output to GDB" - depends on KGDB +config CMDLINE_OVERRIDE + bool "Built-in command line overrides firmware arguments" + default n + depends on CMDLINE_BOOL help - If you are using GDB for remote debugging over a serial port and - would like kernel messages to be formatted into GDB $O packets so - that GDB prints them as program output, say 'Y'. + 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 SB1XXX_CORELIS bool "Corelis Debugger" @@ -70,17 +93,33 @@ config RUNTIME_DEBUG 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 - include/asm-mips/debug.h for debuging macros. + arch/mips/include/asm/debug.h for debugging macros. If unsure, say N. -config MIPS_UNCACHED - bool "Run uncached" - depends on DEBUG_KERNEL && !SMP && !SGI_IP27 +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 - If you say Y here there kernel will disable all CPU caches. This will - reduce the system's performance dramatically but can help finding - otherwise hard to track bugs. It can also useful if you're doing - hardware debugging with a logic analyzer and need to see all traffic - on the bus. + Add several files to the debugfs to test spinlock speed. endmenu |