menu "Kernel hacking"
+config TRACE_IRQFLAGS_SUPPORT
+ def_bool y
+
source "lib/Kconfig.debug"
config SH_STANDARD_BIOS
bool "Use LinuxSH standard BIOS"
+ depends on SUPERH32
help
Say Y here if your target has the gdb-sh-stub
package from www.m17n.org (or any conforming standard LinuxSH BIOS)
config EARLY_SCIF_CONSOLE
bool "Use early SCIF console"
- depends on CPU_SH4
+ help
+ This enables an early console using a fixed SCIF port. This can
+ be used by platforms that are either not running the SH
+ standard BIOS, or do not wish to use the BIOS callbacks for the
+ serial I/O.
+
+config EARLY_SCIF_CONSOLE_PORT
+ hex
+ depends on EARLY_SCIF_CONSOLE
+ default "0xa4400000" if CPU_SUBTYPE_SH7712 || CPU_SUBTYPE_SH7705
+ default "0xa4430000" if CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721
+ default "0xf8420000" if CPU_SUBTYPE_SH7619
+ default "0xff804000" if CPU_SUBTYPE_MXG
+ default "0xffc30000" if CPU_SUBTYPE_SHX3
+ default "0xffe00000" if CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7763 || \
+ CPU_SUBTYPE_SH7722 || CPU_SUBTYPE_SH7366 || \
+ CPU_SUBTYPE_SH7343
+ default "0xffe80000" if CPU_SH4
+ default "0xffea0000" if CPU_SUBTYPE_SH7785
+ default "0xfffe8000" if CPU_SUBTYPE_SH7203
+ default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263
+ default "0x00000000"
config EARLY_PRINTK
bool "Early printk support"
when the kernel may crash or hang before the serial console is
initialised. If unsure, say N.
-config KGDB
- bool "Include KGDB kernel debugger"
- help
- Include in-kernel hooks for kgdb, the Linux kernel source level
- debugger. See <http://kgdb.sourceforge.net/> for more information.
- Unless you are intending to debug the kernel, say N here.
+ On devices that are running SH-IPL and want to keep the port
+ initialization consistent while not using the BIOS callbacks,
+ select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using
+ the kernel command line option to toggle back and forth.
-menu "KGDB configuration options"
- depends on KGDB
+config DEBUG_BOOTMEM
+ depends on DEBUG_KERNEL
+ bool "Debug BOOTMEM initialization"
-config MORE_COMPILE_OPTIONS
- bool "Add any additional compile options"
+config DEBUG_STACKOVERFLOW
+ bool "Check for stack overflows"
+ depends on DEBUG_KERNEL && SUPERH32
help
- If you want to add additional CFLAGS to the kernel build, enable this
- option and then enter what you would like to add in the next question.
- Note however that -g is already appended with the selection of KGDB.
+ This option will cause messages to be printed if free stack space
+ drops below a certain limit.
-config COMPILE_OPTIONS
- string "Additional compile arguments"
- depends on MORE_COMPILE_OPTIONS
-
-config KGDB_NMI
- bool "Enter KGDB on NMI"
- default n
+config DEBUG_STACK_USAGE
+ bool "Stack utilization instrumentation"
+ depends on DEBUG_KERNEL
+ help
+ Enables the display of the minimum amount of free stack which each
+ task has ever had available in the sysrq-T and sysrq-P debug output.
-config KGDB_THREAD
- bool "Include KGDB thread support"
- default y
+ This option will slow down process creation somewhat.
-config SH_KGDB_CONSOLE
- bool "Console messages through GDB"
+config 4KSTACKS
+ bool "Use 4Kb for kernel stacks instead of 8Kb"
+ depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
+ help
+ If you say Y here the kernel will use a 4Kb stacksize for the
+ kernel stack attached to each process/thread. This facilitates
+ running more threads on a system and also reduces the pressure
+ on the VM subsystem for higher order allocations. This option
+ will also use IRQ stacks to compensate for the reduced stackspace.
+
+config IRQSTACKS
+ bool "Use separate kernel stacks when processing interrupts"
+ depends on DEBUG_KERNEL && SUPERH32
+ help
+ If you say Y here the kernel will use separate kernel stacks
+ for handling hard and soft interrupts. This can help avoid
+ overflowing the process kernel stacks.
+
+config DUMP_CODE
+ bool "Show disassembly of nearby code in register dumps"
+ depends on DEBUG_KERNEL && SUPERH32
+ default y if DEBUG_BUGVERBOSE
default n
+ help
+ This prints out a code trace of the instructions leading up to
+ the faulting instruction as a debugging aid. As this does grow
+ the kernel in size a bit, most users will want to say N here.
-config KGDB_SYSRQ
- bool "Allow SysRq 'G' to enter KGDB"
- default y
+ Those looking for more verbose debugging output should say Y.
-config KGDB_KERNEL_ASSERTS
- bool "Include KGDB kernel assertions"
+config SH_NO_BSS_INIT
+ bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
+ depends on DEBUG_KERNEL
default n
+ help
+ If running in painfully slow environments, such as an RTL
+ simulation or from remote memory via SHdebug, where the memory
+ can already be gauranteed to ber zeroed on boot, say Y.
-comment "Serial port setup"
-
-config KGDB_DEFPORT
- int "Port number (ttySCn)"
- default "1"
-
-config KGDB_DEFBAUD
- int "Baud rate"
- default "115200"
-
-choice
- prompt "Parity"
- depends on KGDB
- default KGDB_DEFPARITY_N
-
-config KGDB_DEFPARITY_N
- bool "None"
-
-config KGDB_DEFPARITY_E
- bool "Even"
-
-config KGDB_DEFPARITY_O
- bool "Odd"
-
-endchoice
-
-choice
- prompt "Data bits"
- depends on KGDB
- default KGDB_DEFBITS_8
-
-config KGDB_DEFBITS_8
- bool "8"
+ For all other cases, say N. If this option seems perplexing, or
+ you aren't sure, say N.
-config KGDB_DEFBITS_7
- bool "7"
+config MORE_COMPILE_OPTIONS
+ bool "Add any additional compile options"
+ help
+ If you want to add additional CFLAGS to the kernel build, enable this
+ option and then enter what you would like to add in the next question.
+ Note however that -g is already appended with the selection of KGDB.
-endchoice
+config COMPILE_OPTIONS
+ string "Additional compile arguments"
+ depends on MORE_COMPILE_OPTIONS
-endmenu
+config SH64_SR_WATCH
+ bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
+ depends on SUPERH64
-config FRAME_POINTER
- bool "Compile the kernel with frame pointers"
- default y if KGDB
+config POOR_MANS_STRACE
+ bool "Debug: enable rudimentary strace facility"
+ depends on SUPERH64
help
- If you say Y here the resulting kernel image will be slightly larger
- and slower, but it will give very useful debugging information.
- If you don't debug the kernel, you can say N, but we may not be able
- to solve problems without frame pointers.
+ This option allows system calls to be traced to the console. It also
+ aids in detecting kernel stack underflow. It is useful for debugging
+ early-userland problems (e.g. init incurring fatal exceptions.)
endmenu
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff