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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001# SPDX-License-Identifier: GPL-2.0
Linus Torvalds1da177e2005-04-16 15:20:36 -07002
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 -07006config SH_STANDARD_BIOS
7 bool "Use LinuxSH standard BIOS"
Paul Mundt1a013e22008-04-25 11:54:06 +09008 depends on SUPERH32
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 help
10 Say Y here if your target has the gdb-sh-stub
11 package from www.m17n.org (or any conforming standard LinuxSH BIOS)
12 in FLASH or EPROM. The kernel will use standard BIOS calls during
13 boot for various housekeeping tasks (including calls to read and
14 write characters to a system console, get a MAC address from an
15 on-board Ethernet interface, and shut down the hardware). Note this
16 does not work with machines with an existing operating system in
17 mask ROM and no flash (WindowsCE machines fall in this category).
18 If unsure, say N.
19
Paul Mundt9f14b842009-07-11 20:05:34 +090020config STACK_DEBUG
Paul Mundtd153ea82006-09-27 18:20:16 +090021 bool "Check for stack overflows"
Paul Mundt5db141a2007-11-21 17:47:15 +090022 depends on DEBUG_KERNEL && SUPERH32
Paul Mundtd153ea82006-09-27 18:20:16 +090023 help
24 This option will cause messages to be printed if free stack space
Paul Mundt9f14b842009-07-11 20:05:34 +090025 drops below a certain limit. Saying Y here will add overhead to
26 every function call and will therefore incur a major
27 performance hit. Most users should say N.
Paul Mundtd153ea82006-09-27 18:20:16 +090028
Paul Mundta6a311392006-09-27 18:22:14 +090029config 4KSTACKS
30 bool "Use 4Kb for kernel stacks instead of 8Kb"
Paul Mundtb817f7e2008-09-20 20:16:35 +090031 depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
Paul Mundta6a311392006-09-27 18:22:14 +090032 help
33 If you say Y here the kernel will use a 4Kb stacksize for the
34 kernel stack attached to each process/thread. This facilitates
35 running more threads on a system and also reduces the pressure
36 on the VM subsystem for higher order allocations. This option
37 will also use IRQ stacks to compensate for the reduced stackspace.
38
Paul Mundt110ed282007-11-02 12:16:51 +090039config IRQSTACKS
40 bool "Use separate kernel stacks when processing interrupts"
Paul Mundt40c8bca2009-05-07 15:24:36 +090041 depends on DEBUG_KERNEL && SUPERH32 && BROKEN
Paul Mundt110ed282007-11-02 12:16:51 +090042 help
43 If you say Y here the kernel will use separate kernel stacks
44 for handling hard and soft interrupts. This can help avoid
45 overflowing the process kernel stacks.
46
Paul Mundt5d2685d2008-12-17 15:56:06 +090047config DUMP_CODE
48 bool "Show disassembly of nearby code in register dumps"
49 depends on DEBUG_KERNEL && SUPERH32
50 default y if DEBUG_BUGVERBOSE
51 default n
52 help
53 This prints out a code trace of the instructions leading up to
54 the faulting instruction as a debugging aid. As this does grow
55 the kernel in size a bit, most users will want to say N here.
56
57 Those looking for more verbose debugging output should say Y.
58
Matt Flemingbd353862009-08-14 01:58:43 +090059config DWARF_UNWINDER
60 bool "Enable the DWARF unwinder for stacktraces"
61 select FRAME_POINTER
Paul Mundtda47f4a2012-03-30 19:31:22 +090062 depends on SUPERH32
Matt Flemingbd353862009-08-14 01:58:43 +090063 default n
64 help
65 Enabling this option will make stacktraces more accurate, at
66 the cost of an increase in overall kernel size.
67
Paul Mundt740a3e62008-12-17 15:33:43 +090068config SH_NO_BSS_INIT
69 bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
70 depends on DEBUG_KERNEL
71 default n
72 help
73 If running in painfully slow environments, such as an RTL
74 simulation or from remote memory via SHdebug, where the memory
Lucas De Marchi25985ed2011-03-30 22:57:33 -030075 can already be guaranteed to ber zeroed on boot, say Y.
Paul Mundt740a3e62008-12-17 15:33:43 +090076
77 For all other cases, say N. If this option seems perplexing, or
78 you aren't sure, say N.
79
Paul Mundt8214d522007-11-21 16:58:56 +090080config SH64_SR_WATCH
81 bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
Paul Mundtfe58cac2008-12-17 15:36:50 +090082 depends on SUPERH64
Paul Mundt8214d522007-11-21 16:58:56 +090083
Paul Mundt473d1cf2009-07-11 19:56:58 +090084config MCOUNT
85 def_bool y
86 depends on SUPERH32
87 depends on STACK_DEBUG || FUNCTION_TRACER