xref: /linux/arch/sh/Kconfig.debug (revision f7511d5f66f01fc451747b24e79f3ada7a3af9af) 
1menu "Kernel hacking"
2
3config TRACE_IRQFLAGS_SUPPORT
4	def_bool y
5
6source "lib/Kconfig.debug"
7
8config SH_STANDARD_BIOS
9	bool "Use LinuxSH standard BIOS"
10	help
11	  Say Y here if your target has the gdb-sh-stub
12	  package from www.m17n.org (or any conforming standard LinuxSH BIOS)
13	  in FLASH or EPROM.  The kernel will use standard BIOS calls during
14	  boot for various housekeeping tasks (including calls to read and
15	  write characters to a system console, get a MAC address from an
16	  on-board Ethernet interface, and shut down the hardware).  Note this
17	  does not work with machines with an existing operating system in
18	  mask ROM and no flash (WindowsCE machines fall in this category).
19	  If unsure, say N.
20
21config EARLY_SCIF_CONSOLE
22	bool "Use early SCIF console"
23	help
24	  This enables an early console using a fixed SCIF port. This can
25	  be used by platforms that are either not running the SH
26	  standard BIOS, or do not wish to use the BIOS callbacks for the
27	  serial I/O.
28
29config EARLY_SCIF_CONSOLE_PORT
30	hex
31	depends on EARLY_SCIF_CONSOLE
32	default "0xa4400000" if CPU_SUBTYPE_SH7712 || CPU_SUBTYPE_SH7705
33	default "0xa4430000" if CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721
34	default "0xf8420000" if CPU_SUBTYPE_SH7619
35	default "0xff804000" if CPU_SUBTYPE_MXG
36	default "0xffc30000" if CPU_SUBTYPE_SHX3
37	default "0xffe00000" if CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7763 || \
38				CPU_SUBTYPE_SH7722 || CPU_SUBTYPE_SH7366
39	default "0xffe80000" if CPU_SH4
40	default "0xffea0000" if CPU_SUBTYPE_SH7785
41	default "0xfffe8000" if CPU_SUBTYPE_SH7203
42	default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263
43	default "0x00000000"
44
45config EARLY_PRINTK
46	bool "Early printk support"
47	depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE
48	help
49	  Say Y here to redirect kernel printk messages to the serial port
50	  used by the SH-IPL bootloader, starting very early in the boot
51	  process and ending when the kernel's serial console is initialised.
52	  This option is only useful porting the kernel to a new machine,
53	  when the kernel may crash or hang before the serial console is
54	  initialised. If unsure, say N.
55
56	  On devices that are running SH-IPL and want to keep the port
57	  initialization consistent while not using the BIOS callbacks,
58	  select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using
59	  the kernel command line option to toggle back and forth.
60
61config DEBUG_BOOTMEM
62	depends on DEBUG_KERNEL
63	bool "Debug BOOTMEM initialization"
64
65config DEBUG_STACKOVERFLOW
66	bool "Check for stack overflows"
67	depends on DEBUG_KERNEL && SUPERH32
68	help
69	  This option will cause messages to be printed if free stack space
70	  drops below a certain limit.
71
72config DEBUG_STACK_USAGE
73	bool "Stack utilization instrumentation"
74	depends on DEBUG_KERNEL
75	help
76	  Enables the display of the minimum amount of free stack which each
77	  task has ever had available in the sysrq-T and sysrq-P debug output.
78
79	  This option will slow down process creation somewhat.
80
81config 4KSTACKS
82	bool "Use 4Kb for kernel stacks instead of 8Kb"
83	depends on DEBUG_KERNEL
84	help
85	  If you say Y here the kernel will use a 4Kb stacksize for the
86	  kernel stack attached to each process/thread. This facilitates
87	  running more threads on a system and also reduces the pressure
88	  on the VM subsystem for higher order allocations. This option
89	  will also use IRQ stacks to compensate for the reduced stackspace.
90
91config IRQSTACKS
92	bool "Use separate kernel stacks when processing interrupts"
93	depends on DEBUG_KERNEL && SUPERH32
94	help
95	  If you say Y here the kernel will use separate kernel stacks
96	  for handling hard and soft interrupts.  This can help avoid
97	  overflowing the process kernel stacks.
98
99config SH_KGDB
100	bool "Include KGDB kernel debugger"
101	select FRAME_POINTER
102	select DEBUG_INFO
103	depends on CPU_SH3 || CPU_SH4
104	help
105	  Include in-kernel hooks for kgdb, the Linux kernel source level
106	  debugger.  See <http://kgdb.sourceforge.net/> for more information.
107	  Unless you are intending to debug the kernel, say N here.
108
109menu "KGDB configuration options"
110	depends on SH_KGDB
111
112config MORE_COMPILE_OPTIONS
113	bool "Add any additional compile options"
114	help
115	  If you want to add additional CFLAGS to the kernel build, enable this
116	  option and then enter what you would like to add in the next question.
117	  Note however that -g is already appended with the selection of KGDB.
118
119config COMPILE_OPTIONS
120	string "Additional compile arguments"
121	depends on MORE_COMPILE_OPTIONS
122
123config KGDB_NMI
124	def_bool n
125	prompt "Enter KGDB on NMI"
126
127config SH_KGDB_CONSOLE
128	def_bool n
129	prompt "Console messages through GDB"
130	depends on !SERIAL_SH_SCI_CONSOLE && SERIAL_SH_SCI=y
131	select SERIAL_CORE_CONSOLE
132
133config KGDB_SYSRQ
134	def_bool y
135	prompt "Allow SysRq 'G' to enter KGDB"
136	depends on MAGIC_SYSRQ
137
138comment "Serial port setup"
139
140config KGDB_DEFPORT
141	int "Port number (ttySCn)"
142	default "1"
143
144config KGDB_DEFBAUD
145	int "Baud rate"
146	default "115200"
147
148choice
149	prompt "Parity"
150	depends on SH_KGDB
151	default KGDB_DEFPARITY_N
152
153config KGDB_DEFPARITY_N
154	bool "None"
155
156config KGDB_DEFPARITY_E
157	bool "Even"
158
159config KGDB_DEFPARITY_O
160	bool "Odd"
161
162endchoice
163
164choice
165	prompt "Data bits"
166	depends on SH_KGDB
167	default KGDB_DEFBITS_8
168
169config KGDB_DEFBITS_8
170	bool "8"
171
172config KGDB_DEFBITS_7
173	bool "7"
174
175endchoice
176
177endmenu
178
179if SUPERH64
180
181config SH64_PROC_ASIDS
182	bool "Debug: report ASIDs through /proc/asids"
183	depends on PROC_FS
184
185config SH64_SR_WATCH
186	bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
187
188config POOR_MANS_STRACE
189	bool "Debug: enable rudimentary strace facility"
190	help
191	  This option allows system calls to be traced to the console.  It also
192	  aids in detecting kernel stack underflow.  It is useful for debugging
193	  early-userland problems (e.g. init incurring fatal exceptions.)
194
195config SH_ALPHANUMERIC
196	bool "Enable debug outputs to on-board alphanumeric display"
197	depends on SH_CAYMAN
198
199config SH_NO_BSS_INIT
200	bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
201
202endif
203
204endmenu
205