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 "0xffea0000" if CPU_SUBTYPE_SH7785
42 default "0xffeb0000" if CPU_SUBTYPE_SH7786
43 default "0xfffe8000" if CPU_SUBTYPE_SH7203
44 default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263
45 default "0xffe80000" if CPU_SH4
49 bool "Early printk support"
50 depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE
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.
59 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.
64 config DEBUG_STACKOVERFLOW
65 bool "Check for stack overflows"
66 depends on DEBUG_KERNEL && SUPERH32
68 This option will cause messages to be printed if free stack space
69 drops below a certain limit.
71 config DEBUG_STACK_USAGE
72 bool "Stack utilization instrumentation"
73 depends on DEBUG_KERNEL
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.
78 This option will slow down process creation somewhat.
81 bool "Use 4Kb for kernel stacks instead of 8Kb"
82 depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
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.
91 bool "Use separate kernel stacks when processing interrupts"
92 depends on DEBUG_KERNEL && SUPERH32 && BROKEN
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.
99 bool "Show disassembly of nearby code in register dumps"
100 depends on DEBUG_KERNEL && SUPERH32
101 default y if DEBUG_BUGVERBOSE
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.
108 Those looking for more verbose debugging output should say Y.
110 config SH_NO_BSS_INIT
111 bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
112 depends on DEBUG_KERNEL
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.
119 For all other cases, say N. If this option seems perplexing, or
120 you aren't sure, say N.
123 bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"