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_SH7206 35 default "0xf8420000" if CPU_SUBTYPE_SH7619 36 default "0xa4400000" if CPU_SUBTYPE_SH7712 || CPU_SUBTYPE_SH7705 37 default "0xffe80000" if CPU_SH4 38 39config EARLY_PRINTK 40 bool "Early printk support" 41 depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE 42 help 43 Say Y here to redirect kernel printk messages to the serial port 44 used by the SH-IPL bootloader, starting very early in the boot 45 process and ending when the kernel's serial console is initialised. 46 This option is only useful porting the kernel to a new machine, 47 when the kernel may crash or hang before the serial console is 48 initialised. If unsure, say N. 49 50 On devices that are running SH-IPL and want to keep the port 51 initialization consistent while not using the BIOS callbacks, 52 select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using 53 the kernel command line option to toggle back and forth. 54 55config DEBUG_STACKOVERFLOW 56 bool "Check for stack overflows" 57 depends on DEBUG_KERNEL 58 help 59 This option will cause messages to be printed if free stack space 60 drops below a certain limit. 61 62config DEBUG_STACK_USAGE 63 bool "Stack utilization instrumentation" 64 depends on DEBUG_KERNEL 65 help 66 Enables the display of the minimum amount of free stack which each 67 task has ever had available in the sysrq-T and sysrq-P debug output. 68 69 This option will slow down process creation somewhat. 70 71config 4KSTACKS 72 bool "Use 4Kb for kernel stacks instead of 8Kb" 73 depends on DEBUG_KERNEL 74 help 75 If you say Y here the kernel will use a 4Kb stacksize for the 76 kernel stack attached to each process/thread. This facilitates 77 running more threads on a system and also reduces the pressure 78 on the VM subsystem for higher order allocations. This option 79 will also use IRQ stacks to compensate for the reduced stackspace. 80 81config SH_KGDB 82 bool "Include KGDB kernel debugger" 83 select FRAME_POINTER 84 select DEBUG_INFO 85 help 86 Include in-kernel hooks for kgdb, the Linux kernel source level 87 debugger. See <http://kgdb.sourceforge.net/> for more information. 88 Unless you are intending to debug the kernel, say N here. 89 90menu "KGDB configuration options" 91 depends on SH_KGDB 92 93config MORE_COMPILE_OPTIONS 94 bool "Add any additional compile options" 95 help 96 If you want to add additional CFLAGS to the kernel build, enable this 97 option and then enter what you would like to add in the next question. 98 Note however that -g is already appended with the selection of KGDB. 99 100config COMPILE_OPTIONS 101 string "Additional compile arguments" 102 depends on MORE_COMPILE_OPTIONS 103 104config KGDB_NMI 105 bool "Enter KGDB on NMI" 106 default n 107 108config SH_KGDB_CONSOLE 109 bool "Console messages through GDB" 110 depends on !SERIAL_SH_SCI_CONSOLE 111 select SERIAL_CORE_CONSOLE 112 default n 113 114config KGDB_SYSRQ 115 bool "Allow SysRq 'G' to enter KGDB" 116 default y 117 118comment "Serial port setup" 119 120config KGDB_DEFPORT 121 int "Port number (ttySCn)" 122 default "1" 123 124config KGDB_DEFBAUD 125 int "Baud rate" 126 default "115200" 127 128choice 129 prompt "Parity" 130 depends on SH_KGDB 131 default KGDB_DEFPARITY_N 132 133config KGDB_DEFPARITY_N 134 bool "None" 135 136config KGDB_DEFPARITY_E 137 bool "Even" 138 139config KGDB_DEFPARITY_O 140 bool "Odd" 141 142endchoice 143 144choice 145 prompt "Data bits" 146 depends on SH_KGDB 147 default KGDB_DEFBITS_8 148 149config KGDB_DEFBITS_8 150 bool "8" 151 152config KGDB_DEFBITS_7 153 bool "7" 154 155endchoice 156 157endmenu 158 159endmenu 160