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 32 depends on EARLY_SCIF_CONSOLE 33 default "0xffe00000" if CPU_SUBTYPE_SH7780 34 default "0xffea0000" if CPU_SUBTYPE_SH7785 35 default "0xfffe9800" if CPU_SUBTYPE_SH7206 36 default "0xf8420000" if CPU_SUBTYPE_SH7619 37 default "0xa4400000" if CPU_SUBTYPE_SH7712 || CPU_SUBTYPE_SH7705 38 default "0xa4430000" if CPU_SUBTYPE_SH7720 39 default "0xffc30000" if CPU_SUBTYPE_SHX3 40 default "0xffe80000" if CPU_SH4 41 default "0x00000000" 42 43config EARLY_PRINTK 44 bool "Early printk support" 45 depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE 46 help 47 Say Y here to redirect kernel printk messages to the serial port 48 used by the SH-IPL bootloader, starting very early in the boot 49 process and ending when the kernel's serial console is initialised. 50 This option is only useful porting the kernel to a new machine, 51 when the kernel may crash or hang before the serial console is 52 initialised. If unsure, say N. 53 54 On devices that are running SH-IPL and want to keep the port 55 initialization consistent while not using the BIOS callbacks, 56 select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using 57 the kernel command line option to toggle back and forth. 58 59config DEBUG_BOOTMEM 60 depends on DEBUG_KERNEL 61 bool "Debug BOOTMEM initialization" 62 63config DEBUG_STACKOVERFLOW 64 bool "Check for stack overflows" 65 depends on DEBUG_KERNEL 66 help 67 This option will cause messages to be printed if free stack space 68 drops below a certain limit. 69 70config DEBUG_STACK_USAGE 71 bool "Stack utilization instrumentation" 72 depends on DEBUG_KERNEL 73 help 74 Enables the display of the minimum amount of free stack which each 75 task has ever had available in the sysrq-T and sysrq-P debug output. 76 77 This option will slow down process creation somewhat. 78 79config 4KSTACKS 80 bool "Use 4Kb for kernel stacks instead of 8Kb" 81 depends on DEBUG_KERNEL 82 help 83 If you say Y here the kernel will use a 4Kb stacksize for the 84 kernel stack attached to each process/thread. This facilitates 85 running more threads on a system and also reduces the pressure 86 on the VM subsystem for higher order allocations. This option 87 will also use IRQ stacks to compensate for the reduced stackspace. 88 89config IRQSTACKS 90 bool "Use separate kernel stacks when processing interrupts" 91 depends on DEBUG_KERNEL 92 help 93 If you say Y here the kernel will use separate kernel stacks 94 for handling hard and soft interrupts. This can help avoid 95 overflowing the process kernel stacks. 96 97config SH_KGDB 98 bool "Include KGDB kernel debugger" 99 select FRAME_POINTER 100 select DEBUG_INFO 101 depends on CPU_SH3 || CPU_SH4 102 help 103 Include in-kernel hooks for kgdb, the Linux kernel source level 104 debugger. See <http://kgdb.sourceforge.net/> for more information. 105 Unless you are intending to debug the kernel, say N here. 106 107menu "KGDB configuration options" 108 depends on SH_KGDB 109 110config MORE_COMPILE_OPTIONS 111 bool "Add any additional compile options" 112 help 113 If you want to add additional CFLAGS to the kernel build, enable this 114 option and then enter what you would like to add in the next question. 115 Note however that -g is already appended with the selection of KGDB. 116 117config COMPILE_OPTIONS 118 string "Additional compile arguments" 119 depends on MORE_COMPILE_OPTIONS 120 121config KGDB_NMI 122 bool "Enter KGDB on NMI" 123 default n 124 125config SH_KGDB_CONSOLE 126 bool "Console messages through GDB" 127 depends on !SERIAL_SH_SCI_CONSOLE && SERIAL_SH_SCI=y 128 select SERIAL_CORE_CONSOLE 129 default n 130 131config KGDB_SYSRQ 132 bool "Allow SysRq 'G' to enter KGDB" 133 depends on MAGIC_SYSRQ 134 default y 135 136comment "Serial port setup" 137 138config KGDB_DEFPORT 139 int "Port number (ttySCn)" 140 default "1" 141 142config KGDB_DEFBAUD 143 int "Baud rate" 144 default "115200" 145 146choice 147 prompt "Parity" 148 depends on SH_KGDB 149 default KGDB_DEFPARITY_N 150 151config KGDB_DEFPARITY_N 152 bool "None" 153 154config KGDB_DEFPARITY_E 155 bool "Even" 156 157config KGDB_DEFPARITY_O 158 bool "Odd" 159 160endchoice 161 162choice 163 prompt "Data bits" 164 depends on SH_KGDB 165 default KGDB_DEFBITS_8 166 167config KGDB_DEFBITS_8 168 bool "8" 169 170config KGDB_DEFBITS_7 171 bool "7" 172 173endchoice 174 175endmenu 176 177endmenu 178