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_BOOTMEM 56 depends on DEBUG_KERNEL 57 bool "Debug BOOTMEM initialization" 58 59config DEBUG_STACKOVERFLOW 60 bool "Check for stack overflows" 61 depends on DEBUG_KERNEL 62 help 63 This option will cause messages to be printed if free stack space 64 drops below a certain limit. 65 66config DEBUG_STACK_USAGE 67 bool "Stack utilization instrumentation" 68 depends on DEBUG_KERNEL 69 help 70 Enables the display of the minimum amount of free stack which each 71 task has ever had available in the sysrq-T and sysrq-P debug output. 72 73 This option will slow down process creation somewhat. 74 75config 4KSTACKS 76 bool "Use 4Kb for kernel stacks instead of 8Kb" 77 depends on DEBUG_KERNEL 78 help 79 If you say Y here the kernel will use a 4Kb stacksize for the 80 kernel stack attached to each process/thread. This facilitates 81 running more threads on a system and also reduces the pressure 82 on the VM subsystem for higher order allocations. This option 83 will also use IRQ stacks to compensate for the reduced stackspace. 84 85config SH_KGDB 86 bool "Include KGDB kernel debugger" 87 select FRAME_POINTER 88 select DEBUG_INFO 89 depends on CPU_SH3 || CPU_SH4 90 help 91 Include in-kernel hooks for kgdb, the Linux kernel source level 92 debugger. See <http://kgdb.sourceforge.net/> for more information. 93 Unless you are intending to debug the kernel, say N here. 94 95menu "KGDB configuration options" 96 depends on SH_KGDB 97 98config MORE_COMPILE_OPTIONS 99 bool "Add any additional compile options" 100 help 101 If you want to add additional CFLAGS to the kernel build, enable this 102 option and then enter what you would like to add in the next question. 103 Note however that -g is already appended with the selection of KGDB. 104 105config COMPILE_OPTIONS 106 string "Additional compile arguments" 107 depends on MORE_COMPILE_OPTIONS 108 109config KGDB_NMI 110 bool "Enter KGDB on NMI" 111 default n 112 113config SH_KGDB_CONSOLE 114 bool "Console messages through GDB" 115 depends on !SERIAL_SH_SCI_CONSOLE 116 select SERIAL_CORE_CONSOLE 117 default n 118 119config KGDB_SYSRQ 120 bool "Allow SysRq 'G' to enter KGDB" 121 default y 122 123comment "Serial port setup" 124 125config KGDB_DEFPORT 126 int "Port number (ttySCn)" 127 default "1" 128 129config KGDB_DEFBAUD 130 int "Baud rate" 131 default "115200" 132 133choice 134 prompt "Parity" 135 depends on SH_KGDB 136 default KGDB_DEFPARITY_N 137 138config KGDB_DEFPARITY_N 139 bool "None" 140 141config KGDB_DEFPARITY_E 142 bool "Even" 143 144config KGDB_DEFPARITY_O 145 bool "Odd" 146 147endchoice 148 149choice 150 prompt "Data bits" 151 depends on SH_KGDB 152 default KGDB_DEFBITS_8 153 154config KGDB_DEFBITS_8 155 bool "8" 156 157config KGDB_DEFBITS_7 158 bool "7" 159 160endchoice 161 162endmenu 163 164endmenu 165