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 "0xfe4c0000" if CPU_SUBTYPE_SH7757
42 default "0xffeb0000" if CPU_SUBTYPE_SH7785
43 default "0xffeb0000" if CPU_SUBTYPE_SH7786
44 default "0xfffe8000" if CPU_SUBTYPE_SH7203
45 default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263
46 default "0xffe80000" if CPU_SH4
47 default "0xa4000150" if CPU_SH3
51 bool "Early printk support"
52 depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE
54 Say Y here to redirect kernel printk messages to the serial port
55 used by the SH-IPL bootloader, starting very early in the boot
56 process and ending when the kernel's serial console is initialised.
57 This option is only useful porting the kernel to a new machine,
58 when the kernel may crash or hang before the serial console is
59 initialised. If unsure, say N.
61 On devices that are running SH-IPL and want to keep the port
62 initialization consistent while not using the BIOS callbacks,
63 select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using
64 the kernel command line option to toggle back and forth.
67 bool "Check for stack overflows"
68 depends on DEBUG_KERNEL && SUPERH32
70 This option will cause messages to be printed if free stack space
71 drops below a certain limit. Saying Y here will add overhead to
72 every function call and will therefore incur a major
73 performance hit. Most users should say N.
75 config DEBUG_STACK_USAGE
76 bool "Stack utilization instrumentation"
77 depends on DEBUG_KERNEL
79 Enables the display of the minimum amount of free stack which each
80 task has ever had available in the sysrq-T and sysrq-P debug output.
82 This option will slow down process creation somewhat.
85 bool "Use 4Kb for kernel stacks instead of 8Kb"
86 depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
88 If you say Y here the kernel will use a 4Kb stacksize for the
89 kernel stack attached to each process/thread. This facilitates
90 running more threads on a system and also reduces the pressure
91 on the VM subsystem for higher order allocations. This option
92 will also use IRQ stacks to compensate for the reduced stackspace.
95 bool "Use separate kernel stacks when processing interrupts"
96 depends on DEBUG_KERNEL && SUPERH32 && BROKEN
98 If you say Y here the kernel will use separate kernel stacks
99 for handling hard and soft interrupts. This can help avoid
100 overflowing the process kernel stacks.
103 bool "Show disassembly of nearby code in register dumps"
104 depends on DEBUG_KERNEL && SUPERH32
105 default y if DEBUG_BUGVERBOSE
108 This prints out a code trace of the instructions leading up to
109 the faulting instruction as a debugging aid. As this does grow
110 the kernel in size a bit, most users will want to say N here.
112 Those looking for more verbose debugging output should say Y.
114 config DWARF_UNWINDER
115 bool "Enable the DWARF unwinder for stacktraces"
119 Enabling this option will make stacktraces more accurate, at
120 the cost of an increase in overall kernel size.
122 config SH_NO_BSS_INIT
123 bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
124 depends on DEBUG_KERNEL
127 If running in painfully slow environments, such as an RTL
128 simulation or from remote memory via SHdebug, where the memory
129 can already be gauranteed to ber zeroed on boot, say Y.
131 For all other cases, say N. If this option seems perplexing, or
132 you aren't sure, say N.
135 bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
141 depends on STACK_DEBUG || FUNCTION_TRACER