blob: 39224b57c6efe5ae5d37a45c68d34811fbc0f047 [file] [log] [blame]
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
22config EARLY_SCIF_CONSOLE
23 bool "Use early SCIF console"
Paul Mundt6fc21b82006-11-27 12:10:23 +090024 help
25 This enables an early console using a fixed SCIF port. This can
26 be used by platforms that are either not running the SH
27 standard BIOS, or do not wish to use the BIOS callbacks for the
28 serial I/O.
29
30config EARLY_SCIF_CONSOLE_PORT
Paul Mundt8d797cd2007-08-07 18:52:29 +090031 hex
Paul Mundt6fc21b82006-11-27 12:10:23 +090032 depends on EARLY_SCIF_CONSOLE
Paul Mundt2ad69902008-03-13 12:52:44 +090033 default "0xa4400000" if CPU_SUBTYPE_SH7712 || CPU_SUBTYPE_SH7705
34 default "0xa4430000" if CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721
35 default "0xf8420000" if CPU_SUBTYPE_SH7619
36 default "0xff804000" if CPU_SUBTYPE_MXG
37 default "0xffc30000" if CPU_SUBTYPE_SHX3
38 default "0xffe00000" if CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7763 || \
Yoshihiro Shimodaa4e1d082008-07-07 21:11:51 +090039 CPU_SUBTYPE_SH7722 || CPU_SUBTYPE_SH7366 || \
40 CPU_SUBTYPE_SH7343
Magnus Damm5cbc3af2007-09-10 12:05:10 +090041 default "0xffea0000" if CPU_SUBTYPE_SH7785
Paul Mundt8b27fc62009-06-16 03:58:25 +090042 default "0xffeb0000" if CPU_SUBTYPE_SH7786
Paul Mundt6d01f512007-11-26 18:17:21 +090043 default "0xfffe8000" if CPU_SUBTYPE_SH7203
Paul Mundta8f67f42007-11-26 19:54:02 +090044 default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263
Magnus Damm5dafc912009-05-07 10:17:44 +000045 default "0xffe80000" if CPU_SH4
Paul Mundt8d797cd2007-08-07 18:52:29 +090046 default "0x00000000"
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48config EARLY_PRINTK
49 bool "Early printk support"
50 depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE
51 help
52 Say Y here to redirect kernel printk messages to the serial port
53 used by the SH-IPL bootloader, starting very early in the boot
54 process and ending when the kernel's serial console is initialised.
55 This option is only useful porting the kernel to a new machine,
56 when the kernel may crash or hang before the serial console is
57 initialised. If unsure, say N.
58
Paul Mundt6fc21b82006-11-27 12:10:23 +090059 On devices that are running SH-IPL and want to keep the port
60 initialization consistent while not using the BIOS callbacks,
61 select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using
62 the kernel command line option to toggle back and forth.
63
Paul Mundtd153ea82006-09-27 18:20:16 +090064config DEBUG_STACKOVERFLOW
65 bool "Check for stack overflows"
Paul Mundt5db141a2007-11-21 17:47:15 +090066 depends on DEBUG_KERNEL && SUPERH32
Paul Mundtd153ea82006-09-27 18:20:16 +090067 help
68 This option will cause messages to be printed if free stack space
69 drops below a certain limit.
70
71config DEBUG_STACK_USAGE
72 bool "Stack utilization instrumentation"
73 depends on DEBUG_KERNEL
74 help
75 Enables the display of the minimum amount of free stack which each
76 task has ever had available in the sysrq-T and sysrq-P debug output.
77
78 This option will slow down process creation somewhat.
79
Paul Mundta6a311392006-09-27 18:22:14 +090080config 4KSTACKS
81 bool "Use 4Kb for kernel stacks instead of 8Kb"
Paul Mundtb817f7e2008-09-20 20:16:35 +090082 depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
Paul Mundta6a311392006-09-27 18:22:14 +090083 help
84 If you say Y here the kernel will use a 4Kb stacksize for the
85 kernel stack attached to each process/thread. This facilitates
86 running more threads on a system and also reduces the pressure
87 on the VM subsystem for higher order allocations. This option
88 will also use IRQ stacks to compensate for the reduced stackspace.
89
Paul Mundt110ed282007-11-02 12:16:51 +090090config IRQSTACKS
91 bool "Use separate kernel stacks when processing interrupts"
Paul Mundt40c8bca2009-05-07 15:24:36 +090092 depends on DEBUG_KERNEL && SUPERH32 && BROKEN
Paul Mundt110ed282007-11-02 12:16:51 +090093 help
94 If you say Y here the kernel will use separate kernel stacks
95 for handling hard and soft interrupts. This can help avoid
96 overflowing the process kernel stacks.
97
Paul Mundt5d2685d2008-12-17 15:56:06 +090098config DUMP_CODE
99 bool "Show disassembly of nearby code in register dumps"
100 depends on DEBUG_KERNEL && SUPERH32
101 default y if DEBUG_BUGVERBOSE
102 default n
103 help
104 This prints out a code trace of the instructions leading up to
105 the faulting instruction as a debugging aid. As this does grow
106 the kernel in size a bit, most users will want to say N here.
107
108 Those looking for more verbose debugging output should say Y.
109
Paul Mundt740a3e62008-12-17 15:33:43 +0900110config SH_NO_BSS_INIT
111 bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
112 depends on DEBUG_KERNEL
113 default n
114 help
115 If running in painfully slow environments, such as an RTL
116 simulation or from remote memory via SHdebug, where the memory
117 can already be gauranteed to ber zeroed on boot, say Y.
118
119 For all other cases, say N. If this option seems perplexing, or
120 you aren't sure, say N.
121
Paul Mundt8214d522007-11-21 16:58:56 +0900122config SH64_SR_WATCH
123 bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
Paul Mundtfe58cac2008-12-17 15:36:50 +0900124 depends on SUPERH64
Paul Mundt8214d522007-11-21 16:58:56 +0900125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126endmenu