3 config TRACE_IRQFLAGS_SUPPORT
6 source "lib/Kconfig.debug"
8 config SH_STANDARD_BIOS
9 bool "Use LinuxSH standard BIOS"
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).
22 config EARLY_SCIF_CONSOLE
23 bool "Use early SCIF console"
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
30 config EARLY_SCIF_CONSOLE_PORT
32 depends on EARLY_SCIF_CONSOLE
33 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 || \
39 CPU_SUBTYPE_SH7722 || CPU_SUBTYPE_SH7366 || \
41 default "0xffe80000" if CPU_SH4
42 default "0xffea0000" if CPU_SUBTYPE_SH7785
43 default "0xfffe8000" if CPU_SUBTYPE_SH7203
44 default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263
48 bool "Early printk support"
49 depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE
51 Say Y here to redirect kernel printk messages to the serial port
52 used by the SH-IPL bootloader, starting very early in the boot
53 process and ending when the kernel's serial console is initialised.
54 This option is only useful porting the kernel to a new machine,
55 when the kernel may crash or hang before the serial console is
56 initialised. If unsure, say N.
58 On devices that are running SH-IPL and want to keep the port
59 initialization consistent while not using the BIOS callbacks,
60 select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using
61 the kernel command line option to toggle back and forth.
64 depends on DEBUG_KERNEL
65 bool "Debug BOOTMEM initialization"
67 config DEBUG_STACKOVERFLOW
68 bool "Check for stack overflows"
69 depends on DEBUG_KERNEL && SUPERH32
71 This option will cause messages to be printed if free stack space
72 drops below a certain limit.
74 config DEBUG_STACK_USAGE
75 bool "Stack utilization instrumentation"
76 depends on DEBUG_KERNEL
78 Enables the display of the minimum amount of free stack which each
79 task has ever had available in the sysrq-T and sysrq-P debug output.
81 This option will slow down process creation somewhat.
84 bool "Use 4Kb for kernel stacks instead of 8Kb"
85 depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
87 If you say Y here the kernel will use a 4Kb stacksize for the
88 kernel stack attached to each process/thread. This facilitates
89 running more threads on a system and also reduces the pressure
90 on the VM subsystem for higher order allocations. This option
91 will also use IRQ stacks to compensate for the reduced stackspace.
94 bool "Use separate kernel stacks when processing interrupts"
95 depends on DEBUG_KERNEL && SUPERH32
97 If you say Y here the kernel will use separate kernel stacks
98 for handling hard and soft interrupts. This can help avoid
99 overflowing the process kernel stacks.
102 bool "Show disassembly of nearby code in register dumps"
103 depends on DEBUG_KERNEL && SUPERH32
104 default y if DEBUG_BUGVERBOSE
107 This prints out a code trace of the instructions leading up to
108 the faulting instruction as a debugging aid. As this does grow
109 the kernel in size a bit, most users will want to say N here.
111 Those looking for more verbose debugging output should say Y.
113 config SH_NO_BSS_INIT
114 bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
115 depends on DEBUG_KERNEL
118 If running in painfully slow environments, such as an RTL
119 simulation or from remote memory via SHdebug, where the memory
120 can already be gauranteed to ber zeroed on boot, say Y.
122 For all other cases, say N. If this option seems perplexing, or
123 you aren't sure, say N.
125 config MORE_COMPILE_OPTIONS
126 bool "Add any additional compile options"
128 If you want to add additional CFLAGS to the kernel build, enable this
129 option and then enter what you would like to add in the next question.
130 Note however that -g is already appended with the selection of KGDB.
132 config COMPILE_OPTIONS
133 string "Additional compile arguments"
134 depends on MORE_COMPILE_OPTIONS
137 bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
140 config POOR_MANS_STRACE
141 bool "Debug: enable rudimentary strace facility"
144 This option allows system calls to be traced to the console. It also
145 aids in detecting kernel stack underflow. It is useful for debugging
146 early-userland problems (e.g. init incurring fatal exceptions.)