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Paul Mackerras14cf11a2005-09-26 16:04:21 +10001menu "Kernel hacking"
2
3source "lib/Kconfig.debug"
4
Paul Mackerrasff642082005-10-10 22:15:52 +10005config DEBUG_STACKOVERFLOW
6 bool "Check for stack overflows"
7 depends on DEBUG_KERNEL && PPC64
8 help
9 This option will cause messages to be printed if free stack space
10 drops below a certain limit.
11
Paul Mackerrasff642082005-10-10 22:15:52 +100012config DEBUG_STACK_USAGE
13 bool "Stack utilization instrumentation"
14 depends on DEBUG_KERNEL && PPC64
15 help
16 Enables the display of the minimum amount of free stack which each
17 task has ever had available in the sysrq-T and sysrq-P debug output.
18
19 This option will slow down process creation somewhat.
20
21config DEBUGGER
22 bool "Enable debugger hooks"
23 depends on DEBUG_KERNEL
24 help
25 Include in-kernel hooks for kernel debuggers. Unless you are
26 intending to debug the kernel, say N here.
27
Paul Mackerras14cf11a2005-09-26 16:04:21 +100028config KGDB
29 bool "Include kgdb kernel debugger"
Paul Mackerrasff642082005-10-10 22:15:52 +100030 depends on DEBUGGER && (BROKEN || PPC_GEN550 || 4xx)
Paul Mackerras14cf11a2005-09-26 16:04:21 +100031 select DEBUG_INFO
32 help
33 Include in-kernel hooks for kgdb, the Linux kernel source level
34 debugger. See <http://kgdb.sourceforge.net/> for more information.
35 Unless you are intending to debug the kernel, say N here.
36
37choice
38 prompt "Serial Port"
39 depends on KGDB
40 default KGDB_TTYS1
41
42config KGDB_TTYS0
43 bool "ttyS0"
44
45config KGDB_TTYS1
46 bool "ttyS1"
47
48config KGDB_TTYS2
49 bool "ttyS2"
50
51config KGDB_TTYS3
52 bool "ttyS3"
53
54endchoice
55
56config KGDB_CONSOLE
57 bool "Enable serial console thru kgdb port"
58 depends on KGDB && 8xx || CPM2
59 help
60 If you enable this, all serial console messages will be sent
61 over the gdb stub.
62 If unsure, say N.
63
64config XMON
65 bool "Include xmon kernel debugger"
Paul Mackerrasff642082005-10-10 22:15:52 +100066 depends on DEBUGGER && !PPC_ISERIES
Paul Mackerras14cf11a2005-09-26 16:04:21 +100067 help
68 Include in-kernel hooks for the xmon kernel monitor/debugger.
69 Unless you are intending to debug the kernel, say N here.
Paul Mackerrasff642082005-10-10 22:15:52 +100070 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
71 nothing will appear on the screen (xmon writes directly to the
72 framebuffer memory).
73 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
74 very early during boot. 'xmon=on' will just enable the xmon
75 debugger hooks. 'xmon=off' will disable the debugger hooks
76 if CONFIG_XMON_DEFAULT is set.
77
78config XMON_DEFAULT
79 bool "Enable xmon by default"
80 depends on XMON
81 help
82 xmon is normally disabled unless booted with 'xmon=on'.
83 Use 'xmon=off' to disable xmon init during runtime.
84
85config IRQSTACKS
86 bool "Use separate kernel stacks when processing interrupts"
87 depends on PPC64
88 help
89 If you say Y here the kernel will use separate kernel stacks
90 for handling hard and soft interrupts. This can help avoid
91 overflowing the process kernel stacks.
Paul Mackerras14cf11a2005-09-26 16:04:21 +100092
93config BDI_SWITCH
94 bool "Include BDI-2000 user context switcher"
Paul Mackerrasff642082005-10-10 22:15:52 +100095 depends on DEBUG_KERNEL && PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +100096 help
97 Include in-kernel support for the Abatron BDI2000 debugger.
98 Unless you are intending to debug the kernel with one of these
99 machines, say N here.
100
101config BOOTX_TEXT
102 bool "Support for early boot text console (BootX or OpenFirmware only)"
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000103 depends PPC_OF && !PPC_ISERIES
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000104 help
105 Say Y here to see progress messages from the boot firmware in text
106 mode. Requires either BootX or Open Firmware.
107
108config SERIAL_TEXT_DEBUG
109 bool "Support for early boot texts over serial port"
110 depends on 4xx || LOPEC || MV64X60 || PPLUS || PRPMC800 || \
111 PPC_GEN550 || PPC_MPC52xx
112
Michael Ellerman296167a2006-01-11 11:54:09 +1100113choice
114 prompt "Early debugging (dangerous)"
115 bool
116 optional
117 help
118 Enable early debugging. Careful, if you enable debugging for the
119 wrong type of machine your kernel _will not boot_.
120
121config PPC_EARLY_DEBUG_LPAR
122 bool "LPAR HV Console"
123 depends on PPC_PSERIES
124 help
125 Select this to enable early debugging for a machine with a HVC
126 console on vterm 0.
127
128config PPC_EARLY_DEBUG_G5
129 bool "Apple G5"
130 depends on PPC_PMAC64
131 help
132 Select this to enable early debugging for Apple G5 machines.
133
134config PPC_EARLY_DEBUG_RTAS
135 bool "RTAS Panel"
136 depends on PPC_RTAS
137 help
138 Select this to enable early debugging via the RTAS panel.
139
140config PPC_EARLY_DEBUG_MAPLE
141 bool "Maple real mode"
142 depends on PPC_MAPLE
143 help
144 Select this to enable early debugging for Maple.
145
146config PPC_EARLY_DEBUG_ISERIES
147 bool "iSeries HV Console"
148 depends on PPC_ISERIES
149 help
150 Select this to enable early debugging for legacy iSeries. You need
151 to hit "Ctrl-x Ctrl-x" to see the messages on the console.
152
153endchoice
154
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000155endmenu