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790edb61 G |
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 | ||
790edb61 G |
30 | # These options are only for real kernel hackers who want to get their hands dirty. |
31 | config DEBUG_LL | |
32 | bool "Kernel low-level debugging functions" | |
33 | depends on DEBUG_KERNEL | |
34 | help | |
35 | Say Y here to include definitions of printascii, printch, printhex | |
36 | in the kernel. This is helpful if you are debugging code that | |
37 | executes before the console is initialized. | |
38 | ||
39 | config DEBUG_OCD | |
40 | bool "Kernel low-level debugging via On-Chip-Debugger" | |
41 | depends on DEBUG_LL | |
42 | default y | |
43 | help | |
44 | Say Y here if you want the debug print routines to direct their | |
45 | output to the UniCore On-Chip-Debugger channel using CP #1. | |
46 | ||
47 | config DEBUG_OCD_BREAKPOINT | |
48 | bool "Breakpoint support via On-Chip-Debugger" | |
49 | depends on DEBUG_OCD | |
50 | ||
51 | config DEBUG_UART | |
52 | int "Kernel low-level debugging messages via serial port" | |
53 | depends on DEBUG_LL | |
54 | range 0 1 | |
55 | default "0" | |
56 | help | |
57 | Choice for UART for kernel low-level using PKUnity UARTS, | |
58 | should be between zero and one. The port must have been | |
59 | initialised by the boot-loader before use. | |
60 | ||
61 | endmenu |