1menu "Kernel hacking" 2 3config TRACE_IRQFLAGS_SUPPORT 4 bool 5 default y 6 7source "lib/Kconfig.debug" 8 9config SH_STANDARD_BIOS 10 bool "Use LinuxSH standard BIOS" 11 help 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). 20 If unsure, say N. 21 22config EARLY_SCIF_CONSOLE 23 bool "Use early SCIF console" 24 help 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 28 serial I/O. 29 30config EARLY_SCIF_CONSOLE_PORT 31 hex "SCIF port for early console" 32 depends on EARLY_SCIF_CONSOLE 33 default "0xffe00000" if CPU_SUBTYPE_SH7780 34 default "0xfffe9800" if CPU_SUBTYPE_SH72060 35 default "0xffe80000" if CPU_SH4 36 37config EARLY_PRINTK 38 bool "Early printk support" 39 depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE 40 help 41 Say Y here to redirect kernel printk messages to the serial port 42 used by the SH-IPL bootloader, starting very early in the boot 43 process and ending when the kernel's serial console is initialised. 44 This option is only useful porting the kernel to a new machine, 45 when the kernel may crash or hang before the serial console is 46 initialised. If unsure, say N. 47 48 On devices that are running SH-IPL and want to keep the port 49 initialization consistent while not using the BIOS callbacks, 50 select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using 51 the kernel command line option to toggle back and forth. 52 53config DEBUG_STACKOVERFLOW 54 bool "Check for stack overflows" 55 depends on DEBUG_KERNEL 56 help 57 This option will cause messages to be printed if free stack space 58 drops below a certain limit. 59 60config DEBUG_STACK_USAGE 61 bool "Stack utilization instrumentation" 62 depends on DEBUG_KERNEL 63 help 64 Enables the display of the minimum amount of free stack which each 65 task has ever had available in the sysrq-T and sysrq-P debug output. 66 67 This option will slow down process creation somewhat. 68 69config 4KSTACKS 70 bool "Use 4Kb for kernel stacks instead of 8Kb" 71 depends on DEBUG_KERNEL 72 help 73 If you say Y here the kernel will use a 4Kb stacksize for the 74 kernel stack attached to each process/thread. This facilitates 75 running more threads on a system and also reduces the pressure 76 on the VM subsystem for higher order allocations. This option 77 will also use IRQ stacks to compensate for the reduced stackspace. 78 79config KGDB 80 bool "Include KGDB kernel debugger" 81 select FRAME_POINTER 82 help 83 Include in-kernel hooks for kgdb, the Linux kernel source level 84 debugger. See <http://kgdb.sourceforge.net/> for more information. 85 Unless you are intending to debug the kernel, say N here. 86 87menu "KGDB configuration options" 88 depends on KGDB 89 90config MORE_COMPILE_OPTIONS 91 bool "Add any additional compile options" 92 help 93 If you want to add additional CFLAGS to the kernel build, enable this 94 option and then enter what you would like to add in the next question. 95 Note however that -g is already appended with the selection of KGDB. 96 97config COMPILE_OPTIONS 98 string "Additional compile arguments" 99 depends on MORE_COMPILE_OPTIONS 100 101config KGDB_NMI 102 bool "Enter KGDB on NMI" 103 default n 104 105config KGDB_THREAD 106 bool "Include KGDB thread support" 107 default y 108 109config SH_KGDB_CONSOLE 110 bool "Console messages through GDB" 111 default n 112 113config KGDB_SYSRQ 114 bool "Allow SysRq 'G' to enter KGDB" 115 default y 116 117config KGDB_KERNEL_ASSERTS 118 bool "Include KGDB kernel assertions" 119 default n 120 121comment "Serial port setup" 122 123config KGDB_DEFPORT 124 int "Port number (ttySCn)" 125 default "1" 126 127config KGDB_DEFBAUD 128 int "Baud rate" 129 default "115200" 130 131choice 132 prompt "Parity" 133 depends on KGDB 134 default KGDB_DEFPARITY_N 135 136config KGDB_DEFPARITY_N 137 bool "None" 138 139config KGDB_DEFPARITY_E 140 bool "Even" 141 142config KGDB_DEFPARITY_O 143 bool "Odd" 144 145endchoice 146 147choice 148 prompt "Data bits" 149 depends on KGDB 150 default KGDB_DEFBITS_8 151 152config KGDB_DEFBITS_8 153 bool "8" 154 155config KGDB_DEFBITS_7 156 bool "7" 157 158endchoice 159 160endmenu 161 162endmenu 163