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Linus Torvalds1da177e2005-04-16 15:20:36 -07001menu "Kernel hacking"
2
Paul Mundtafbfb522006-12-04 18:17:28 +09003config TRACE_IRQFLAGS_SUPPORT
Harvey Harrisond7ef4fb2007-12-11 13:49:35 +09004 def_bool y
Paul Mundtafbfb522006-12-04 18:17:28 +09005
Linus Torvalds1da177e2005-04-16 15:20:36 -07006source "lib/Kconfig.debug"
7
8config SH_STANDARD_BIOS
9 bool "Use LinuxSH standard BIOS"
Paul Mundt1a013e22008-04-25 11:54:06 +090010 depends on SUPERH32
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 help
12 Say Y here if your target has the gdb-sh-stub
13 package from www.m17n.org (or any conforming standard LinuxSH BIOS)
14 in FLASH or EPROM. The kernel will use standard BIOS calls during
15 boot for various housekeeping tasks (including calls to read and
16 write characters to a system console, get a MAC address from an
17 on-board Ethernet interface, and shut down the hardware). Note this
18 does not work with machines with an existing operating system in
19 mask ROM and no flash (WindowsCE machines fall in this category).
20 If unsure, say N.
21
Paul Mundt9f14b842009-07-11 20:05:34 +090022config STACK_DEBUG
Paul Mundtd153ea82006-09-27 18:20:16 +090023 bool "Check for stack overflows"
Paul Mundt5db141a2007-11-21 17:47:15 +090024 depends on DEBUG_KERNEL && SUPERH32
Paul Mundtd153ea82006-09-27 18:20:16 +090025 help
26 This option will cause messages to be printed if free stack space
Paul Mundt9f14b842009-07-11 20:05:34 +090027 drops below a certain limit. Saying Y here will add overhead to
28 every function call and will therefore incur a major
29 performance hit. Most users should say N.
Paul Mundtd153ea82006-09-27 18:20:16 +090030
Paul Mundta6a311392006-09-27 18:22:14 +090031config 4KSTACKS
32 bool "Use 4Kb for kernel stacks instead of 8Kb"
Paul Mundtb817f7e2008-09-20 20:16:35 +090033 depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
Paul Mundta6a311392006-09-27 18:22:14 +090034 help
35 If you say Y here the kernel will use a 4Kb stacksize for the
36 kernel stack attached to each process/thread. This facilitates
37 running more threads on a system and also reduces the pressure
38 on the VM subsystem for higher order allocations. This option
39 will also use IRQ stacks to compensate for the reduced stackspace.
40
Paul Mundt110ed282007-11-02 12:16:51 +090041config IRQSTACKS
42 bool "Use separate kernel stacks when processing interrupts"
Paul Mundt40c8bca2009-05-07 15:24:36 +090043 depends on DEBUG_KERNEL && SUPERH32 && BROKEN
Paul Mundt110ed282007-11-02 12:16:51 +090044 help
45 If you say Y here the kernel will use separate kernel stacks
46 for handling hard and soft interrupts. This can help avoid
47 overflowing the process kernel stacks.
48
Paul Mundt5d2685d2008-12-17 15:56:06 +090049config DUMP_CODE
50 bool "Show disassembly of nearby code in register dumps"
51 depends on DEBUG_KERNEL && SUPERH32
52 default y if DEBUG_BUGVERBOSE
53 default n
54 help
55 This prints out a code trace of the instructions leading up to
56 the faulting instruction as a debugging aid. As this does grow
57 the kernel in size a bit, most users will want to say N here.
58
59 Those looking for more verbose debugging output should say Y.
60
Matt Flemingbd353862009-08-14 01:58:43 +090061config DWARF_UNWINDER
62 bool "Enable the DWARF unwinder for stacktraces"
63 select FRAME_POINTER
64 default n
65 help
66 Enabling this option will make stacktraces more accurate, at
67 the cost of an increase in overall kernel size.
68
Paul Mundt740a3e62008-12-17 15:33:43 +090069config SH_NO_BSS_INIT
70 bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
71 depends on DEBUG_KERNEL
72 default n
73 help
74 If running in painfully slow environments, such as an RTL
75 simulation or from remote memory via SHdebug, where the memory
Lucas De Marchi25985ed2011-03-30 22:57:33 -030076 can already be guaranteed to ber zeroed on boot, say Y.
Paul Mundt740a3e62008-12-17 15:33:43 +090077
78 For all other cases, say N. If this option seems perplexing, or
79 you aren't sure, say N.
80
Paul Mundt8214d522007-11-21 16:58:56 +090081config SH64_SR_WATCH
82 bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
Paul Mundtfe58cac2008-12-17 15:36:50 +090083 depends on SUPERH64
Paul Mundt8214d522007-11-21 16:58:56 +090084
Paul Mundt473d1cf2009-07-11 19:56:58 +090085config MCOUNT
86 def_bool y
87 depends on SUPERH32
88 depends on STACK_DEBUG || FUNCTION_TRACER
89
Linus Torvalds1da177e2005-04-16 15:20:36 -070090endmenu