11da177e4SLinus Torvaldsmenu "Kernel hacking" 21da177e4SLinus Torvalds 3afbfb52eSPaul Mundtconfig TRACE_IRQFLAGS_SUPPORT 4afbfb52eSPaul Mundt bool 5afbfb52eSPaul Mundt default y 6afbfb52eSPaul Mundt 71da177e4SLinus Torvaldssource "lib/Kconfig.debug" 81da177e4SLinus Torvalds 91da177e4SLinus Torvaldsconfig SH_STANDARD_BIOS 101da177e4SLinus Torvalds bool "Use LinuxSH standard BIOS" 111da177e4SLinus Torvalds help 121da177e4SLinus Torvalds Say Y here if your target has the gdb-sh-stub 131da177e4SLinus Torvalds package from www.m17n.org (or any conforming standard LinuxSH BIOS) 141da177e4SLinus Torvalds in FLASH or EPROM. The kernel will use standard BIOS calls during 151da177e4SLinus Torvalds boot for various housekeeping tasks (including calls to read and 161da177e4SLinus Torvalds write characters to a system console, get a MAC address from an 171da177e4SLinus Torvalds on-board Ethernet interface, and shut down the hardware). Note this 181da177e4SLinus Torvalds does not work with machines with an existing operating system in 191da177e4SLinus Torvalds mask ROM and no flash (WindowsCE machines fall in this category). 201da177e4SLinus Torvalds If unsure, say N. 211da177e4SLinus Torvalds 221da177e4SLinus Torvaldsconfig EARLY_SCIF_CONSOLE 231da177e4SLinus Torvalds bool "Use early SCIF console" 246fc21b82SPaul Mundt help 256fc21b82SPaul Mundt This enables an early console using a fixed SCIF port. This can 266fc21b82SPaul Mundt be used by platforms that are either not running the SH 276fc21b82SPaul Mundt standard BIOS, or do not wish to use the BIOS callbacks for the 286fc21b82SPaul Mundt serial I/O. 296fc21b82SPaul Mundt 306fc21b82SPaul Mundtconfig EARLY_SCIF_CONSOLE_PORT 318d797cd1SPaul Mundt hex 326fc21b82SPaul Mundt depends on EARLY_SCIF_CONSOLE 336fc21b82SPaul Mundt default "0xffe00000" if CPU_SUBTYPE_SH7780 345cbc3af5SMagnus Damm default "0xffea0000" if CPU_SUBTYPE_SH7785 356d01f510SPaul Mundt default "0xfffe8000" if CPU_SUBTYPE_SH7203 36a8f67f4bSPaul Mundt default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263 3711cbb70eSYoshinori Sato default "0xf8420000" if CPU_SUBTYPE_SH7619 382a8ff459SNobuhiro Iwamatsu default "0xa4400000" if CPU_SUBTYPE_SH7712 || CPU_SUBTYPE_SH7705 393ea6bc3dSMarkus Brunner default "0xa4430000" if CPU_SUBTYPE_SH7720 408d797cd1SPaul Mundt default "0xffc30000" if CPU_SUBTYPE_SHX3 416fc21b82SPaul Mundt default "0xffe80000" if CPU_SH4 428d797cd1SPaul Mundt default "0x00000000" 431da177e4SLinus Torvalds 441da177e4SLinus Torvaldsconfig EARLY_PRINTK 451da177e4SLinus Torvalds bool "Early printk support" 461da177e4SLinus Torvalds depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE 471da177e4SLinus Torvalds help 481da177e4SLinus Torvalds Say Y here to redirect kernel printk messages to the serial port 491da177e4SLinus Torvalds used by the SH-IPL bootloader, starting very early in the boot 501da177e4SLinus Torvalds process and ending when the kernel's serial console is initialised. 511da177e4SLinus Torvalds This option is only useful porting the kernel to a new machine, 521da177e4SLinus Torvalds when the kernel may crash or hang before the serial console is 531da177e4SLinus Torvalds initialised. If unsure, say N. 541da177e4SLinus Torvalds 556fc21b82SPaul Mundt On devices that are running SH-IPL and want to keep the port 566fc21b82SPaul Mundt initialization consistent while not using the BIOS callbacks, 576fc21b82SPaul Mundt select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using 586fc21b82SPaul Mundt the kernel command line option to toggle back and forth. 596fc21b82SPaul Mundt 6091e656aaSPaul Mundtconfig DEBUG_BOOTMEM 6191e656aaSPaul Mundt depends on DEBUG_KERNEL 6291e656aaSPaul Mundt bool "Debug BOOTMEM initialization" 6391e656aaSPaul Mundt 64d153ea88SPaul Mundtconfig DEBUG_STACKOVERFLOW 65d153ea88SPaul Mundt bool "Check for stack overflows" 665db141a9SPaul Mundt depends on DEBUG_KERNEL && SUPERH32 67d153ea88SPaul Mundt help 68d153ea88SPaul Mundt This option will cause messages to be printed if free stack space 69d153ea88SPaul Mundt drops below a certain limit. 70d153ea88SPaul Mundt 71d153ea88SPaul Mundtconfig DEBUG_STACK_USAGE 72d153ea88SPaul Mundt bool "Stack utilization instrumentation" 73d153ea88SPaul Mundt depends on DEBUG_KERNEL 74d153ea88SPaul Mundt help 75d153ea88SPaul Mundt Enables the display of the minimum amount of free stack which each 76d153ea88SPaul Mundt task has ever had available in the sysrq-T and sysrq-P debug output. 77d153ea88SPaul Mundt 78d153ea88SPaul Mundt This option will slow down process creation somewhat. 79d153ea88SPaul Mundt 80a6a31139SPaul Mundtconfig 4KSTACKS 81a6a31139SPaul Mundt bool "Use 4Kb for kernel stacks instead of 8Kb" 82a6a31139SPaul Mundt depends on DEBUG_KERNEL 83a6a31139SPaul Mundt help 84a6a31139SPaul Mundt If you say Y here the kernel will use a 4Kb stacksize for the 85a6a31139SPaul Mundt kernel stack attached to each process/thread. This facilitates 86a6a31139SPaul Mundt running more threads on a system and also reduces the pressure 87a6a31139SPaul Mundt on the VM subsystem for higher order allocations. This option 88a6a31139SPaul Mundt will also use IRQ stacks to compensate for the reduced stackspace. 89a6a31139SPaul Mundt 90110ed282SPaul Mundtconfig IRQSTACKS 91110ed282SPaul Mundt bool "Use separate kernel stacks when processing interrupts" 925db141a9SPaul Mundt depends on DEBUG_KERNEL && SUPERH32 93110ed282SPaul Mundt help 94110ed282SPaul Mundt If you say Y here the kernel will use separate kernel stacks 95110ed282SPaul Mundt for handling hard and soft interrupts. This can help avoid 96110ed282SPaul Mundt overflowing the process kernel stacks. 97110ed282SPaul Mundt 98fa5da2f7SPaul Mundtconfig SH_KGDB 991da177e4SLinus Torvalds bool "Include KGDB kernel debugger" 1002549b322SPaul Mundt select FRAME_POINTER 101fa5da2f7SPaul Mundt select DEBUG_INFO 102357d5946SPaul Mundt depends on CPU_SH3 || CPU_SH4 1031da177e4SLinus Torvalds help 1041da177e4SLinus Torvalds Include in-kernel hooks for kgdb, the Linux kernel source level 1051da177e4SLinus Torvalds debugger. See <http://kgdb.sourceforge.net/> for more information. 1061da177e4SLinus Torvalds Unless you are intending to debug the kernel, say N here. 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvaldsmenu "KGDB configuration options" 109fa5da2f7SPaul Mundt depends on SH_KGDB 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvaldsconfig MORE_COMPILE_OPTIONS 1121da177e4SLinus Torvalds bool "Add any additional compile options" 1131da177e4SLinus Torvalds help 1141da177e4SLinus Torvalds If you want to add additional CFLAGS to the kernel build, enable this 1151da177e4SLinus Torvalds option and then enter what you would like to add in the next question. 1161da177e4SLinus Torvalds Note however that -g is already appended with the selection of KGDB. 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvaldsconfig COMPILE_OPTIONS 1191da177e4SLinus Torvalds string "Additional compile arguments" 1201da177e4SLinus Torvalds depends on MORE_COMPILE_OPTIONS 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvaldsconfig KGDB_NMI 1231da177e4SLinus Torvalds bool "Enter KGDB on NMI" 1241da177e4SLinus Torvalds default n 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvaldsconfig SH_KGDB_CONSOLE 1271da177e4SLinus Torvalds bool "Console messages through GDB" 128808bde25SPaul Mundt depends on !SERIAL_SH_SCI_CONSOLE && SERIAL_SH_SCI=y 129fa5da2f7SPaul Mundt select SERIAL_CORE_CONSOLE 1301da177e4SLinus Torvalds default n 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvaldsconfig KGDB_SYSRQ 1331da177e4SLinus Torvalds bool "Allow SysRq 'G' to enter KGDB" 1340acc729eSPaul Mundt depends on MAGIC_SYSRQ 1351da177e4SLinus Torvalds default y 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvaldscomment "Serial port setup" 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvaldsconfig KGDB_DEFPORT 1401da177e4SLinus Torvalds int "Port number (ttySCn)" 1411da177e4SLinus Torvalds default "1" 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvaldsconfig KGDB_DEFBAUD 1441da177e4SLinus Torvalds int "Baud rate" 1451da177e4SLinus Torvalds default "115200" 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvaldschoice 1481da177e4SLinus Torvalds prompt "Parity" 149fa5da2f7SPaul Mundt depends on SH_KGDB 1501da177e4SLinus Torvalds default KGDB_DEFPARITY_N 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvaldsconfig KGDB_DEFPARITY_N 1531da177e4SLinus Torvalds bool "None" 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvaldsconfig KGDB_DEFPARITY_E 1561da177e4SLinus Torvalds bool "Even" 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvaldsconfig KGDB_DEFPARITY_O 1591da177e4SLinus Torvalds bool "Odd" 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvaldsendchoice 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvaldschoice 1641da177e4SLinus Torvalds prompt "Data bits" 165fa5da2f7SPaul Mundt depends on SH_KGDB 1661da177e4SLinus Torvalds default KGDB_DEFBITS_8 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvaldsconfig KGDB_DEFBITS_8 1691da177e4SLinus Torvalds bool "8" 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvaldsconfig KGDB_DEFBITS_7 1721da177e4SLinus Torvalds bool "7" 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvaldsendchoice 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvaldsendmenu 1771da177e4SLinus Torvalds 1788214d52aSPaul Mundtif SUPERH64 1798214d52aSPaul Mundt 1808214d52aSPaul Mundtconfig SH64_PROC_ASIDS 1818214d52aSPaul Mundt bool "Debug: report ASIDs through /proc/asids" 1828214d52aSPaul Mundt depends on PROC_FS 1838214d52aSPaul Mundt 1848214d52aSPaul Mundtconfig SH64_SR_WATCH 1858214d52aSPaul Mundt bool "Debug: set SR.WATCH to enable hardware watchpoints and trace" 1868214d52aSPaul Mundt 1878214d52aSPaul Mundtconfig POOR_MANS_STRACE 1888214d52aSPaul Mundt bool "Debug: enable rudimentary strace facility" 1898214d52aSPaul Mundt help 1908214d52aSPaul Mundt This option allows system calls to be traced to the console. It also 1918214d52aSPaul Mundt aids in detecting kernel stack underflow. It is useful for debugging 1928214d52aSPaul Mundt early-userland problems (e.g. init incurring fatal exceptions.) 1938214d52aSPaul Mundt 1948214d52aSPaul Mundtconfig SH_ALPHANUMERIC 1958214d52aSPaul Mundt bool "Enable debug outputs to on-board alphanumeric display" 1968214d52aSPaul Mundt depends on SH_CAYMAN 1978214d52aSPaul Mundt 1988214d52aSPaul Mundtconfig SH_NO_BSS_INIT 1998214d52aSPaul Mundt bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)" 2008214d52aSPaul Mundt 2018214d52aSPaul Mundtendif 2028214d52aSPaul Mundt 2031da177e4SLinus Torvaldsendmenu 204