1menu "Kernel hacking" 2 3config TRACE_IRQFLAGS_SUPPORT 4 def_bool y 5 6source "lib/Kconfig.debug" 7 8config SH_STANDARD_BIOS 9 bool "Use LinuxSH standard BIOS" 10 help 11 Say Y here if your target has the gdb-sh-stub 12 package from www.m17n.org (or any conforming standard LinuxSH BIOS) 13 in FLASH or EPROM. The kernel will use standard BIOS calls during 14 boot for various housekeeping tasks (including calls to read and 15 write characters to a system console, get a MAC address from an 16 on-board Ethernet interface, and shut down the hardware). Note this 17 does not work with machines with an existing operating system in 18 mask ROM and no flash (WindowsCE machines fall in this category). 19 If unsure, say N. 20 21config EARLY_SCIF_CONSOLE 22 bool "Use early SCIF console" 23 help 24 This enables an early console using a fixed SCIF port. This can 25 be used by platforms that are either not running the SH 26 standard BIOS, or do not wish to use the BIOS callbacks for the 27 serial I/O. 28 29config EARLY_SCIF_CONSOLE_PORT 30 hex 31 depends on EARLY_SCIF_CONSOLE 32 default "0xffe00000" if CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7763 33 default "0xffe00000" if CPU_SUBTYPE_SH7722 || CPU_SUBTYPE_SH7366 34 default "0xffea0000" if CPU_SUBTYPE_SH7785 35 default "0xfffe8000" if CPU_SUBTYPE_SH7203 36 default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263 37 default "0xf8420000" if CPU_SUBTYPE_SH7619 38 default "0xa4400000" if CPU_SUBTYPE_SH7712 || CPU_SUBTYPE_SH7705 39 default "0xa4430000" if CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721 40 default "0xffc30000" if CPU_SUBTYPE_SHX3 41 default "0xffe80000" if CPU_SH4 42 default "0x00000000" 43 44config EARLY_PRINTK 45 bool "Early printk support" 46 depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE 47 help 48 Say Y here to redirect kernel printk messages to the serial port 49 used by the SH-IPL bootloader, starting very early in the boot 50 process and ending when the kernel's serial console is initialised. 51 This option is only useful porting the kernel to a new machine, 52 when the kernel may crash or hang before the serial console is 53 initialised. If unsure, say N. 54 55 On devices that are running SH-IPL and want to keep the port 56 initialization consistent while not using the BIOS callbacks, 57 select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using 58 the kernel command line option to toggle back and forth. 59 60config DEBUG_BOOTMEM 61 depends on DEBUG_KERNEL 62 bool "Debug BOOTMEM initialization" 63 64config DEBUG_STACKOVERFLOW 65 bool "Check for stack overflows" 66 depends on DEBUG_KERNEL && SUPERH32 67 help 68 This option will cause messages to be printed if free stack space 69 drops below a certain limit. 70 71config DEBUG_STACK_USAGE 72 bool "Stack utilization instrumentation" 73 depends on DEBUG_KERNEL 74 help 75 Enables the display of the minimum amount of free stack which each 76 task has ever had available in the sysrq-T and sysrq-P debug output. 77 78 This option will slow down process creation somewhat. 79 80config 4KSTACKS 81 bool "Use 4Kb for kernel stacks instead of 8Kb" 82 depends on DEBUG_KERNEL 83 help 84 If you say Y here the kernel will use a 4Kb stacksize for the 85 kernel stack attached to each process/thread. This facilitates 86 running more threads on a system and also reduces the pressure 87 on the VM subsystem for higher order allocations. This option 88 will also use IRQ stacks to compensate for the reduced stackspace. 89 90config IRQSTACKS 91 bool "Use separate kernel stacks when processing interrupts" 92 depends on DEBUG_KERNEL && SUPERH32 93 help 94 If you say Y here the kernel will use separate kernel stacks 95 for handling hard and soft interrupts. This can help avoid 96 overflowing the process kernel stacks. 97 98config SH_KGDB 99 bool "Include KGDB kernel debugger" 100 select FRAME_POINTER 101 select DEBUG_INFO 102 depends on CPU_SH3 || CPU_SH4 103 help 104 Include in-kernel hooks for kgdb, the Linux kernel source level 105 debugger. See <http://kgdb.sourceforge.net/> for more information. 106 Unless you are intending to debug the kernel, say N here. 107 108menu "KGDB configuration options" 109 depends on SH_KGDB 110 111config MORE_COMPILE_OPTIONS 112 bool "Add any additional compile options" 113 help 114 If you want to add additional CFLAGS to the kernel build, enable this 115 option and then enter what you would like to add in the next question. 116 Note however that -g is already appended with the selection of KGDB. 117 118config COMPILE_OPTIONS 119 string "Additional compile arguments" 120 depends on MORE_COMPILE_OPTIONS 121 122config KGDB_NMI 123 def_bool n 124 prompt "Enter KGDB on NMI" 125 126config SH_KGDB_CONSOLE 127 def_bool n 128 prompt "Console messages through GDB" 129 depends on !SERIAL_SH_SCI_CONSOLE && SERIAL_SH_SCI=y 130 select SERIAL_CORE_CONSOLE 131 132config KGDB_SYSRQ 133 def_bool y 134 prompt "Allow SysRq 'G' to enter KGDB" 135 depends on MAGIC_SYSRQ 136 137comment "Serial port setup" 138 139config KGDB_DEFPORT 140 int "Port number (ttySCn)" 141 default "1" 142 143config KGDB_DEFBAUD 144 int "Baud rate" 145 default "115200" 146 147choice 148 prompt "Parity" 149 depends on SH_KGDB 150 default KGDB_DEFPARITY_N 151 152config KGDB_DEFPARITY_N 153 bool "None" 154 155config KGDB_DEFPARITY_E 156 bool "Even" 157 158config KGDB_DEFPARITY_O 159 bool "Odd" 160 161endchoice 162 163choice 164 prompt "Data bits" 165 depends on SH_KGDB 166 default KGDB_DEFBITS_8 167 168config KGDB_DEFBITS_8 169 bool "8" 170 171config KGDB_DEFBITS_7 172 bool "7" 173 174endchoice 175 176endmenu 177 178if SUPERH64 179 180config SH64_PROC_ASIDS 181 bool "Debug: report ASIDs through /proc/asids" 182 depends on PROC_FS 183 184config SH64_SR_WATCH 185 bool "Debug: set SR.WATCH to enable hardware watchpoints and trace" 186 187config POOR_MANS_STRACE 188 bool "Debug: enable rudimentary strace facility" 189 help 190 This option allows system calls to be traced to the console. It also 191 aids in detecting kernel stack underflow. It is useful for debugging 192 early-userland problems (e.g. init incurring fatal exceptions.) 193 194config SH_ALPHANUMERIC 195 bool "Enable debug outputs to on-board alphanumeric display" 196 depends on SH_CAYMAN 197 198config SH_NO_BSS_INIT 199 bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)" 200 201endif 202 203endmenu 204