| GuanXuetao | 790edb6 | 2011-02-26 18:24:56 +0800 | [diff] [blame] | 1 | menu "Kernel hacking" |
| 2 | |
| 3 | source "lib/Kconfig.debug" |
| 4 | |
| 5 | config STRICT_DEVMEM |
| 6 | bool "Filter access to /dev/mem" |
| 7 | depends on MMU |
| 8 | ---help--- |
| 9 | If this option is disabled, you allow userspace (root) access to all |
| 10 | of memory, including kernel and userspace memory. Accidental |
| 11 | access to this is obviously disastrous, but specific access can |
| 12 | be used by people debugging the kernel. |
| 13 | |
| 14 | If this option is switched on, the /dev/mem file only allows |
| 15 | userspace access to memory mapped peripherals. |
| 16 | |
| 17 | If in doubt, say Y. |
| 18 | |
| 19 | config EARLY_PRINTK |
| 20 | def_bool DEBUG_OCD |
| 21 | help |
| 22 | Write kernel log output directly into the ocd or to a serial port. |
| 23 | |
| 24 | This is useful for kernel debugging when your machine crashes very |
| 25 | early before the console code is initialized. For normal operation |
| 26 | it is not recommended because it looks ugly and doesn't cooperate |
| 27 | with klogd/syslogd or the X server. You should normally N here, |
| 28 | unless you want to debug such a crash. |
| 29 | |
| 30 | config DEBUG_STACK_USAGE |
| 31 | bool "Enable stack utilization instrumentation" |
| 32 | depends on DEBUG_KERNEL |
| 33 | help |
| 34 | Enables the display of the minimum amount of free stack which each |
| 35 | task has ever had available in the sysrq-T output. |
| 36 | |
| 37 | # These options are only for real kernel hackers who want to get their hands dirty. |
| 38 | config DEBUG_LL |
| 39 | bool "Kernel low-level debugging functions" |
| 40 | depends on DEBUG_KERNEL |
| 41 | help |
| 42 | Say Y here to include definitions of printascii, printch, printhex |
| 43 | in the kernel. This is helpful if you are debugging code that |
| 44 | executes before the console is initialized. |
| 45 | |
| 46 | config DEBUG_OCD |
| 47 | bool "Kernel low-level debugging via On-Chip-Debugger" |
| 48 | depends on DEBUG_LL |
| 49 | default y |
| 50 | help |
| 51 | Say Y here if you want the debug print routines to direct their |
| 52 | output to the UniCore On-Chip-Debugger channel using CP #1. |
| 53 | |
| 54 | config DEBUG_OCD_BREAKPOINT |
| 55 | bool "Breakpoint support via On-Chip-Debugger" |
| 56 | depends on DEBUG_OCD |
| 57 | |
| 58 | config DEBUG_UART |
| 59 | int "Kernel low-level debugging messages via serial port" |
| 60 | depends on DEBUG_LL |
| 61 | range 0 1 |
| 62 | default "0" |
| 63 | help |
| 64 | Choice for UART for kernel low-level using PKUnity UARTS, |
| 65 | should be between zero and one. The port must have been |
| 66 | initialised by the boot-loader before use. |
| 67 | |
| 68 | endmenu |