menu "Kernel hacking" source "lib/Kconfig.debug" config SH_STANDARD_BIOS bool "Use LinuxSH standard BIOS" help Say Y here if your target has the gdb-sh-stub package from www.m17n.org (or any conforming standard LinuxSH BIOS) in FLASH or EPROM. The kernel will use standard BIOS calls during boot for various housekeeping tasks (including calls to read and write characters to a system console, get a MAC address from an on-board Ethernet interface, and shut down the hardware). Note this does not work with machines with an existing operating system in mask ROM and no flash (WindowsCE machines fall in this category). If unsure, say N. config EARLY_SCIF_CONSOLE bool "Use early SCIF console" 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 "SCIF port for early console" depends on EARLY_SCIF_CONSOLE default "0xffe00000" if CPU_SUBTYPE_SH7780 default "0xfffe9800" if CPU_SUBTYPE_SH72060 default "0xffe80000" if CPU_SH4 config EARLY_PRINTK bool "Early printk support" depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE help Say Y here to redirect kernel printk messages to the serial port used by the SH-IPL bootloader, starting very early in the boot process and ending when the kernel's serial console is initialised. This option is only useful porting the kernel to a new machine, when the kernel may crash or hang before the serial console is initialised. If unsure, say N. 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. config DEBUG_STACKOVERFLOW bool "Check for stack overflows" depends on DEBUG_KERNEL help This option will cause messages to be printed if free stack space drops below a certain limit. 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. This option will slow down process creation somewhat. config 4KSTACKS bool "Use 4Kb for kernel stacks instead of 8Kb" depends on DEBUG_KERNEL 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 KGDB bool "Include KGDB kernel debugger" select FRAME_POINTER help Include in-kernel hooks for kgdb, the Linux kernel source level debugger. See for more information. Unless you are intending to debug the kernel, say N here. menu "KGDB configuration options" depends on KGDB 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. config COMPILE_OPTIONS string "Additional compile arguments" depends on MORE_COMPILE_OPTIONS config KGDB_NMI bool "Enter KGDB on NMI" default n config KGDB_THREAD bool "Include KGDB thread support" default y config SH_KGDB_CONSOLE bool "Console messages through GDB" default n config KGDB_SYSRQ bool "Allow SysRq 'G' to enter KGDB" default y config KGDB_KERNEL_ASSERTS bool "Include KGDB kernel assertions" default n 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" config KGDB_DEFBITS_7 bool "7" endchoice endmenu endmenu