# For a description of the syntax of this configuration file, # see Documentation/kbuild/kconfig-language.txt. # mainmenu "Linux/PowerPC Kernel Configuration" config MMU bool default y config UID16 bool config RWSEM_GENERIC_SPINLOCK bool config RWSEM_XCHGADD_ALGORITHM bool default y config HAVE_DEC_LOCK bool default y config PPC bool default y config PPC32 bool default y # All PPCs use generic nvram driver through ppc_md config GENERIC_NVRAM bool default y source "init/Kconfig" menu "Processor" choice prompt "Processor Type" default 6xx config 6xx bool "6xx/7xx/74xx/8260" help There are four types of PowerPC chips supported. The more common types (601, 603, 604, 740, 750, 7400), the Motorola embedded versions (821, 823, 850, 855, 860, 8260), the IBM embedded versions (403 and 405) and the high end 64 bit Power processors (POWER 3, POWER4, and IBM 970 also known as G5) Unless you are building a kernel for one of the embedded processor systems, 64 bit IBM RS/6000 or an Apple G5, choose 6xx. Note that the kernel runs in 32-bit mode even on 64-bit chips. Also note that because the 82xx family has a 603e core, specific support for that chipset is asked later on. config 40x bool "40x" config 44x bool "44x" config POWER3 bool "POWER3" config POWER4 bool "POWER4 and 970 (G5)" config 8xx bool "8xx" endchoice config PTE_64BIT bool depends on 44x default y config ALTIVEC bool "AltiVec Support" depends on 6xx || POWER4 depends on !8260 ---help--- This option enables kernel support for the Altivec extensions to the PowerPC processor. The kernel currently supports saving and restoring altivec registers, and turning on the 'altivec enable' bit so user processes can execute altivec instructions. This option is only usefully if you have a processor that supports altivec (G4, otherwise known as 74xx series), but does not have any affect on a non-altivec cpu (it does, however add code to the kernel). If in doubt, say Y here. config TAU bool "Thermal Management Support" depends on 6xx && !8260 help G3 and G4 processors have an on-chip temperature sensor called the 'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die temperature within 2-4 degrees Celsius. This option shows the current on-die temperature in /proc/cpuinfo if the cpu supports it. Unfortunately, on some chip revisions, this sensor is very inaccurate and in some cases, does not work at all, so don't assume the cpu temp is actually what /proc/cpuinfo says it is. config TAU_INT bool "Interrupt driven TAU driver (DANGEROUS)" depends on TAU ---help--- The TAU supports an interrupt driven mode which causes an interrupt whenever the temperature goes out of range. This is the fastest way to get notified the temp has exceeded a range. With this option off, a timer is used to re-check the temperature periodically. However, on some cpus it appears that the TAU interrupt hardware is buggy and can cause a situation which would lead unexplained hard lockups. Unless you are extending the TAU driver, or enjoy kernel/hardware debugging, leave this option off. config TAU_AVERAGE bool "Average high and low temp" depends on TAU ---help--- The TAU hardware can compare the temperature to an upper and lower bound. The default behavior is to show both the upper and lower bound in /proc/cpuinfo. If the range is large, the temperature is either changing a lot, or the TAU hardware is broken (likely on some G4's). If the range is small (around 4 degrees), the temperature is relatively stable. If you say Y here, a single temperature value, halfway between the upper and lower bounds, will be reported in /proc/cpuinfo. If in doubt, say N here. config MATH_EMULATION bool "Math emulation" depends on 4xx || 8xx ---help--- Some PowerPC chips designed for embedded applications do not have a floating-point unit and therefore do not implement the floating-point instructions in the PowerPC instruction set. If you say Y here, the kernel will include code to emulate a floating-point unit, which will allow programs that use floating-point instructions to run. If you have an Apple machine or an IBM RS/6000 or pSeries machine, or any machine with a 6xx, 7xx or 7xxx series processor, say N here. Saying Y here will not hurt performance (on any machine) but will increase the size of the kernel. config CPU_FREQ bool "CPU Frequency scaling" help Clock scaling allows you to change the clock speed of CPUs on the fly. This is a nice method to save battery power on notebooks, because the lower the clock speed, the less power the CPU consumes. For more information, take a look at linux/Documentation/cpu-freq or at If in doubt, say N. source "drivers/cpufreq/Kconfig" config CPU_FREQ_PMAC bool "Support for Apple PowerBooks" depends on CPU_FREQ && ADB_PMU help This adds support for frequency switching on Apple PowerBooks, this currently includes some models of iBook & Titanium PowerBook. config CPU_FREQ_TABLE bool depends on CPU_FREQ_PMAC default y config PPC601_SYNC_FIX bool "Workarounds for PPC601 bugs" depends on 6xx && (PPC_PREP || PPC_PMAC) help Some versions of the PPC601 (the first PowerPC chip) have bugs which mean that extra synchronization instructions are required near certain instructions, typically those that make major changes to the CPU state. These extra instructions reduce performance slightly. If you say N here, these extra instructions will not be included, resulting in a kernel which will run faster but may not run at all on some systems with the PPC601 chip. If in doubt, say Y here. source arch/ppc/platforms/4xx/Kconfig config PPC64BRIDGE bool depends on POWER3 || POWER4 default y config PPC_STD_MMU bool depends on 6xx || POWER3 || POWER4 default y config NOT_COHERENT_CACHE bool depends on 4xx || 8xx default y endmenu menu "Platform options" choice prompt "8xx Machine Type" depends on 8xx default RPXLITE config RPXLITE bool "RPX-Lite" ---help--- Single-board computers based around the PowerPC MPC8xx chips and intended for embedded applications. The following types are supported: RPX-Lite: Embedded Planet RPX Lite. PC104 form-factor SBC based on the MPC823. RPX-Classic: Embedded Planet RPX Classic Low-fat. Credit-card-size SBC based on the MPC 860 BSE-IP: Bright Star Engineering ip-Engine. TQM823L: TQM850L: TQM855L: TQM860L: MPC8xx based family of mini modules, half credit card size, up to 64 MB of RAM, 8 MB Flash, (Fast) Ethernet, 2 x serial ports, 2 x CAN bus interface, ... Manufacturer: TQ Components, www.tq-group.de Date of Release: October (?) 1999 End of Life: not yet :-) URL: - module: - starter kit: - images: FPS850L: FingerPrint Sensor System (based on TQM850L) Manufacturer: IKENDI AG, Date of Release: November 1999 End of life: end 2000 ? URL: see TQM850L SPD823TS: MPC823 based board used in the "Tele Server" product Manufacturer: Speech Design, Date of Release: Mid 2000 (?) End of life: - URL: select "English", then "Teleteam Solutions", then "TeleServer" IVMS8: MPC860 based board used in the "Integrated Voice Mail System", Small Version (8 voice channels) Manufacturer: Speech Design, Date of Release: December 2000 (?) End of life: - URL: IVML24: MPC860 based board used in the "Integrated Voice Mail System", Large Version (24 voice channels) Manufacturer: Speech Design, Date of Release: March 2001 (?) End of life: - URL: SM850: Service Module (based on TQM850L) Manufacturer: Dependable Computer Systems, Date of Release: end 2000 (?) End of life: mid 2001 (?) URL: HERMES: Hermes-Pro ISDN/LAN router with integrated 8 x hub Manufacturer: Multidata Gesellschaft für Datentechnik und Informatik Date of Release: 2000 (?) End of life: - URL: IP860: VMEBus IP (Industry Pack) carrier board with MPC860 Manufacturer: MicroSys GmbH, Date of Release: ? End of life: - URL: PCU_E: PCU = Peripheral Controller Unit, Extended Manufacturer: Siemens AG, ICN (Information and Communication Networks) Date of Release: April 2001 End of life: August 2001 URL: n. a. config RPXCLASSIC bool "RPX-Classic" help The RPX-Classic is a single-board computer based on the Motorola MPC860. It features 16MB of DRAM and a variable amount of flash, I2C EEPROM, thermal monitoring, a PCMCIA slot, a DIP switch and two LEDs. Variants with Ethernet ports exist. Say Y here to support it directly. config BSEIP bool "BSE-IP" help Say Y here to support the Bright Star Engineering ipEngine SBC. This is a credit-card-sized device featuring a MPC823 processor, 26MB DRAM, 4MB flash, Ethernet, a 16K-gate FPGA, USB, an LCD/video controller, and two RS232 ports. config FADS bool "FADS" config TQM823L bool "TQM823L" help Say Y here to support the TQM823L, one of an MPC8xx-based family of mini SBCs (half credit-card size) from TQ Components first released in late 1999. Technical references are at , and , and an image at . config TQM850L bool "TQM850L" help Say Y here to support the TQM850L, one of an MPC8xx-based family of mini SBCs (half credit-card size) from TQ Components first released in late 1999. Technical references are at , and , and an image at . config TQM855L bool "TQM855L" help Say Y here to support the TQM855L, one of an MPC8xx-based family of mini SBCs (half credit-card size) from TQ Components first released in late 1999. Technical references are at , and , and an image at . config TQM860L bool "TQM860L" help Say Y here to support the TQM860L, one of an MPC8xx-based family of mini SBCs (half credit-card size) from TQ Components first released in late 1999. Technical references are at , and , and an image at . config FPS850L bool "FPS850L" config SPD823TS bool "SPD823TS" help Say Y here to support the Speech Design 823 Tele-Server from Speech Design, released in 2000. The manufacturer's website is at . config IVMS8 bool "IVMS8" help Say Y here to support the Integrated Voice-Mail Small 8-channel SBC from Speech Design, released March 2001. The manufacturer's website is at . config IVML24 bool "IVML24" help Say Y here to support the Integrated Voice-Mail Large 24-channel SBC from Speech Design, released March 2001. The manufacturer's website is at . config SM850 bool "SM850" help Say Y here to support the Service Module 850 from Dependable Computer Systems, an SBC based on the TQM850L module by TQ Components. This board is no longer in production. The manufacturer's website is at . config HERMES_PRO bool "HERMES" config IP860 bool "IP860" config LWMON bool "LWMON" config PCU_E bool "PCU_E" config CCM bool "CCM" config LANTEC bool "LANTEC" config MBX bool "MBX" help MBX is a line of Motorola single-board computer based around the MPC821 and MPC860 processors, and intended for embedded-controller applications. Say Y here to support these boards directly. config WINCEPT bool "WinCept" help The Wincept 100/110 is a Motorola single-board computer based on the MPC821 PowerPC, introduced in 1998 and designed to be used in thin-client machines. Say Y to support it directly. endchoice choice prompt "Machine Type" depends on 6xx || POWER3 || POWER4 default PPC_MULTIPLATFORM ---help--- Linux currently supports several different kinds of PowerPC-based machines: Apple Power Macintoshes and clones (such as the Motorola Starmax series), PReP (PowerPC Reference Platform) machines (such as the Motorola PowerStacks, Motorola cPCI/VME embedded systems, and some IBM RS/6000 systems), CHRP (Common Hardware Reference Platform) machines (including all of the recent IBM RS/6000 and pSeries machines), and several embedded PowerPC systems containing 4xx, 6xx, 7xx, 8xx, 74xx, and 82xx processors. Currently, the default option is to build a kernel which works on the first three. Select CHRP/PowerMac/PReP if configuring for an IBM RS/6000 or pSeries machine, a Power Macintosh (including iMacs, iBooks and Powerbooks), or a PReP machine. Select Gemini if configuring for a Synergy Microsystems' Gemini series Single Board Computer. More information is available at: . Select APUS if configuring for a PowerUP Amiga. More information is available at: . config PPC_MULTIPLATFORM bool "CHRP/PowerMac/PReP" config APUS bool "Amiga-APUS" help Select APUS if configuring for a PowerUP Amiga. More information is available at: . config WILLOW bool "Cogent-Willow" config PCORE bool "Force-PowerCore" config POWERPMC250 bool "Force-PowerPMC250" config EV64260 bool "Galileo-EV-64260-BP" config SPRUCE bool "IBM-Spruce" config LOPEC bool "Motorola-LoPEC" config MCPN765 bool "Motorola-MCPN765" config MVME5100 bool "Motorola-MVME5100" config PPLUS bool "Motorola-PowerPlus" config PRPMC750 bool "Motorola-PrPMC750" config PRPMC800 bool "Motorola-PrPMC800" config SANDPOINT bool "Motorola-Sandpoint" help Select SANDPOINT if configuring for a Motorola Sandpoint X3 (any flavor). config ADIR bool "SBS-Adirondack" config K2 bool "SBS-K2" config PAL4 bool "SBS-Palomar4" config GEMINI bool "Synergy-Gemini" help Select Gemini if configuring for a Synergy Microsystems' Gemini series Single Board Computer. More information is available at: . config EST8260 bool "EST8260" ---help--- The EST8260 is a single-board computer manufactured by Wind River Systems, Inc. (formerly Embedded Support Tools Corp.) and based on the MPC8260. Wind River Systems has a website at , but the EST8260 cannot be found on it and has probably been discontinued or rebadged. config SBS8260 bool "SBS8260" config RPX6 bool "RPXSUPER" config TQM8260 bool "TQM8260" ---help--- MPC8260 based module, little larger than credit card, up to 128 MB global + 64 MB local RAM, 32 MB Flash, 32 kB EEPROM, 256 kB L@ Cache, 10baseT + 100baseT Ethernet, 2 x serial ports, ... Manufacturer: TQ Components, www.tq-group.de Date of Release: June 2001 End of Life: not yet :-) URL: endchoice config TQM8xxL bool depends on 8xx && (TQM823L || TQM850L || FPS850L || TQM855L || TQM860L || SM850) default y config EMBEDDEDBOOT bool depends on 8xx || 8260 default y config 8260 bool "MPC8260 CPM Support" if WILLOW depends on 6xx default y if TQM8260 || RPXSUPER || EST8260 || SBS8260 help The MPC8260 CPM (Communications Processor Module) is a typical embedded CPU made by Motorola. Selecting this option means that you wish to build a kernel for a machine with specifically an 8260 for a CPU. config PPC_CHRP bool depends on PPC_MULTIPLATFORM default y config PPC_PMAC bool depends on PPC_MULTIPLATFORM default y config PPC_PMAC64 bool depends on PPC_PMAC && POWER4 default y config PPC_PREP bool depends on PPC_MULTIPLATFORM default y config PPC_OF bool depends on PPC_PMAC || PPC_CHRP default y config PPC_GEN550 bool depends on SANDPOINT || MCPN765 || SPRUCE || PPLUS || PCORE || PRPMC750 || K2 || PRPMC800 default y config FORCE bool depends on 6xx && (PCORE || POWERPMC250) default y config GT64260 bool depends on EV64260 default y config NONMONARCH_SUPPORT bool "Enable Non-Monarch Support" depends on PRPMC800 config HARRIER bool depends on PRPMC800 default y config EPIC_SERIAL_MODE bool depends on 6xx && (LOPEC || SANDPOINT) default y config MPC10X_BRIDGE bool depends on PCORE || POWERPMC250 || LOPEC || SANDPOINT default y config MPC10X_STORE_GATHERING bool "Enable MPC10x store gathering" depends on MPC10X_BRIDGE config CPC710_DATA_GATHERING bool "Enable CPC710 data gathering" depends on K2 config HARRIER_STORE_GATHERING bool "Enable Harrier store gathering" depends on HARRIER config MVME5100_IPMC761_PRESENT bool "MVME5100 configured with an IPMC761" depends on MVME5100 config SPRUCE_BAUD_33M bool "Spruce baud clock support" depends on SPRUCE config PC_KEYBOARD bool "PC PS/2 style Keyboard" depends on 4xx || 8260 config SERIAL_CONSOLE bool depends on 8xx || 8260 default y config SERIAL_CONSOLE_BAUD int depends on EV64260 default "115200" config PPCBUG_NVRAM bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC default y if PPC_PREP config SMP bool "Symmetric multi-processing support" ---help--- This enables support for systems with more than one CPU. If you have a system with only one CPU, say N. If you have a system with more than one CPU, say Y. Note that the kernel does not currently support SMP machines with 603/603e/603ev or PPC750 ("G3") processors since they have inadequate hardware support for multiprocessor operation. If you say N here, the kernel will run on single and multiprocessor machines, but will use only one CPU of a multiprocessor machine. If you say Y here, the kernel will run on single-processor machines. On a single-processor machine, the kernel will run faster if you say N here. If you don't know what to do here, say N. config IRQ_ALL_CPUS bool "Distribute interrupts on all CPUs by default" depends on SMP help This option gives the kernel permission to distribute IRQs across multiple CPUs. Saying N here will route all IRQs to the first CPU. Generally saying Y is safe, although some problems have been reported with SMP Power Macintoshes with this option enabled. config NR_CPUS int "Maximum number of CPUs (2-32)" range 2 32 depends on SMP default "4" config PREEMPT bool "Preemptible Kernel" help This option reduces the latency of the kernel when reacting to real-time or interactive events by allowing a low priority process to be preempted even if it is in kernel mode executing a system call. Say Y here if you are building a kernel for a desktop, embedded or real-time system. Say N if you are unsure. config HIGHMEM bool "High memory support" config KERNEL_ELF bool default y source "fs/Kconfig.binfmt" config PROC_DEVICETREE bool "Support for Open Firmware device tree in /proc" depends on PPC_OF && PROC_FS help This option adds a device-tree directory under /proc which contains an image of the device tree that the kernel copies from Open Firmware. If unsure, say Y here. config PPC_RTAS bool "Support for RTAS (RunTime Abstraction Services) in /proc" depends on PPC_OF && PROC_FS ---help--- When you use this option, you will be able to use RTAS from userspace. RTAS stands for RunTime Abstraction Services and should provide a portable way to access and set system information. This is commonly used on RS/6000 (pSeries) computers. You can access RTAS via the special proc file system entry rtas. Don't confuse this rtas entry with the one in /proc/device-tree/rtas which is readonly. If you don't know if you can use RTAS look into /proc/device-tree/rtas. If there are some entries, it is very likely that you will be able to use RTAS. You can do cool things with rtas. To print out information about various sensors in the system, just do a $ cat /proc/rtas/sensors or if you power off your machine at night but want it running when you enter your office at 7:45 am, do a # date -d 'tomorrow 7:30' +%s > /proc/rtas/poweron and shutdown. If unsure, say Y. config PREP_RESIDUAL bool "Support for PReP Residual Data" depends on PPC_PREP help Some PReP systems have residual data passed to the kernel by the firmware. This allows detection of memory size, devices present and other useful pieces of information. Sometimes this information is not present or incorrect. Unless you expect to boot on a PReP system, there is no need to select Y. config PROC_PREPRESIDUAL bool "Support for reading of PReP Residual Data in /proc" depends on PREP_RESIDUAL && PROC_FS help Enabling this option will create a /proc/residual file which allows you to get at the residual data on PReP systems. You will need a tool (lsresidual) to parse it. If you aren't on a PReP system, you don't want this. config CMDLINE_BOOL bool "Default bootloader kernel arguments" config CMDLINE string "Initial kernel command string" depends on CMDLINE_BOOL default "console=ttyS0,9600 console=tty0 root=/dev/sda2" help On some platforms, there is currently no way for the boot loader to pass arguments to the kernel. For these platforms, you can supply some command-line options at build time by entering them here. In most cases you will need to specify the root device here. config AMIGA bool depends on APUS default y help This option enables support for the Amiga series of computers. config ZORRO bool depends on APUS default y help This enables support for the Zorro bus in the Amiga. If you have expansion cards in your Amiga that conform to the Amiga AutoConfig(tm) specification, say Y, otherwise N. Note that even expansion cards that do not fit in the Zorro slots but fit in e.g. the CPU slot may fall in this category, so you have to say Y to let Linux use these. config ABSTRACT_CONSOLE bool depends on APUS default y config APUS_FAST_EXCEPT bool depends on APUS default y config AMIGA_PCMCIA bool "Amiga 1200/600 PCMCIA support" depends on APUS && EXPERIMENTAL help Include support in the kernel for pcmcia on Amiga 1200 and Amiga 600. If you intend to use pcmcia cards say Y; otherwise say N. config AMIGA_BUILTIN_SERIAL tristate "Amiga builtin serial support" depends on APUS help If you want to use your Amiga's built-in serial port in Linux, answer Y. To compile this driver as a module, choose M here. config GVPIOEXT tristate "GVP IO-Extender support" depends on APUS help If you want to use a GVP IO-Extender serial card in Linux, say Y. Otherwise, say N. config GVPIOEXT_LP tristate "GVP IO-Extender parallel printer support" depends on GVPIOEXT help Say Y to enable driving a printer from the parallel port on your GVP IO-Extender card, N otherwise. config GVPIOEXT_PLIP tristate "GVP IO-Extender PLIP support" depends on GVPIOEXT help Say Y to enable doing IP over the parallel port on your GVP IO-Extender card, N otherwise. config MULTIFACE_III_TTY tristate "Multiface Card III serial support" depends on APUS help If you want to use a Multiface III card's serial port in Linux, answer Y. To compile this driver as a module, choose M here. config A2232 tristate "Commodore A2232 serial support (EXPERIMENTAL)" depends on EXPERIMENTAL && APUS ---help--- This option supports the 2232 7-port serial card shipped with the Amiga 2000 and other Zorro-bus machines, dating from 1989. At a max of 19,200 bps, the ports are served by a 6551 ACIA UART chip each, plus a 8520 CIA, and a master 6502 CPU and buffer as well. The ports were connected with 8 pin DIN connectors on the card bracket, for which 8 pin to DB25 adapters were supplied. The card also had jumpers internally to toggle various pinning configurations. This driver can be built as a module; but then "generic_serial" will also be built as a module. This has to be loaded before "ser_a2232". If you want to do this, answer M here. config WHIPPET_SERIAL tristate "Hisoft Whippet PCMCIA serial support" depends on AMIGA_PCMCIA help HiSoft has a web page at , but there is no listing for the Whippet in their Amiga section. config APNE tristate "PCMCIA NE2000 support" depends on AMIGA_PCMCIA help If you have a PCMCIA NE2000 compatible adapter, say Y. Otherwise, say N. To compile this driver as a module, choose M here: the module will be called apne. config SERIAL_CONSOLE bool "Support for serial port console" depends on APUS && (AMIGA_BUILTIN_SERIAL=y || GVPIOEXT=y || MULTIFACE_III_TTY=y) config HEARTBEAT bool "Use power LED as a heartbeat" depends on APUS help Use the power-on LED on your machine as a load meter. The exact behavior is platform-dependent, but normally the flash frequency is a hyperbolic function of the 5-minute load average. config PROC_HARDWARE bool "/proc/hardware support" depends on APUS source "drivers/zorro/Kconfig" endmenu menu "Bus options" config ISA bool "Support for ISA-bus hardware" depends on PPC_PREP || PPC_CHRP help Find out whether you have ISA slots on your motherboard. ISA is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. If you have an Apple machine, say N here; if you have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If you have an embedded board, consult your board documentation. config GENERIC_ISA_DMA bool depends on POWER3 || POWER4 || 6xx && !8260 default y config EISA bool help The Extended Industry Standard Architecture (EISA) bus is a bus architecture used on some older intel-based PCs. config SBUS bool # Yes MCA RS/6000s exist but Linux-PPC does not currently support any config MCA bool config PCI bool "PCI support" if 40x || 8260 default y if !40x && !8260 && !8xx && !APUS default PCI_PERMEDIA if !4xx && !8260 && !8xx && APUS default PCI_QSPAN if !4xx && !8260 && 8xx help Find out whether your system includes a PCI bus. PCI is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. If you say Y here, the kernel will include drivers and infrastructure code to support PCI bus devices. config PCI_DOMAINS bool default PCI config PCI_QSPAN bool "QSpan PCI" depends on !4xx && !8260 && 8xx help Say Y here if you have a system based on a Motorola 8xx-series embedded processor with a QSPAN PCI interface, otherwise say N. config PCI_PERMEDIA bool "PCI for Permedia2" depends on !4xx && !8xx && APUS source "drivers/pci/Kconfig" source "drivers/pcmcia/Kconfig" endmenu menu "Advanced setup" config ADVANCED_OPTIONS bool "Prompt for advanced kernel configuration options" help This option will enable prompting for a variety of advanced kernel configuration options. These options can cause the kernel to not work if they are set incorrectly, but can be used to optimize certain aspects of kernel memory management. Unless you know what you are doing, say N here. comment "Default settings for advanced configuration options are used" depends on !ADVANCED_OPTIONS config HIGHMEM_START_BOOL bool "Set high memory pool address" depends on ADVANCED_OPTIONS && HIGHMEM help This option allows you to set the base address of the kernel virtual area used to map high memory pages. This can be useful in optimizing the layout of kernel virtual memory. Say N here unless you know what you are doing. config HIGHMEM_START hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL default "0xfe000000" config LOWMEM_SIZE_BOOL bool "Set maximum low memory" depends on ADVANCED_OPTIONS help This option allows you to set the maximum amount of memory which will be used as "low memory", that is, memory which the kernel can access directly, without having to set up a kernel virtual mapping. This can be useful in optimizing the layout of kernel virtual memory. Say N here unless you know what you are doing. config LOWMEM_SIZE hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL default "0x30000000" config KERNEL_START_BOOL bool "Set custom kernel base address" depends on ADVANCED_OPTIONS help This option allows you to set the kernel virtual address at which the kernel will map low memory (the kernel image will be linked at this address). This can be useful in optimizing the virtual memory layout of the system. Say N here unless you know what you are doing. config KERNEL_START hex "Virtual address of kernel base" if KERNEL_START_BOOL default "0xc0000000" config TASK_SIZE_BOOL bool "Set custom user task size" depends on ADVANCED_OPTIONS help This option allows you to set the amount of virtual address space allocated to user tasks. This can be useful in optimizing the virtual memory layout of the system. Say N here unless you know what you are doing. config TASK_SIZE hex "Size of user task space" if TASK_SIZE_BOOL default "0x80000000" config BOOT_LOAD_BOOL bool "Set the boot link/load address" depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM help This option allows you to set the initial load address of the zImage or zImage.initrd file. This can be useful if you are on a board which has a small amount of memory. Say N here unless you know what you are doing. config BOOT_LOAD hex "Link/load address for booting" if BOOT_LOAD_BOOL default "0x00400000" if 40x || 8xx || 8260 default "0x01000000" if 44x default "0x00800000" config PIN_TLB bool "Pinned Kernel TLBs (860 ONLY)" depends on ADVANCED_OPTIONS && 8xx endmenu source "drivers/Kconfig" source "fs/Kconfig" source "arch/ppc/8xx_io/Kconfig" source "arch/ppc/8260_io/Kconfig" menu "IBM 40x options" depends on 40x config SERIAL_SICC bool "SICC Serial port" depends on STB03xxx config UART1_DFLT_CONSOLE bool depends on SERIAL_SICC && UART0_TTYS1 default y config SERIAL_SICC_CONSOLE bool depends on SERIAL_SICC && UART0_TTYS1 default y endmenu source "lib/Kconfig" menu "Kernel hacking" config DEBUG_KERNEL bool "Kernel debugging" config DEBUG_SLAB bool "Debug memory allocations" depends on DEBUG_KERNEL config MAGIC_SYSRQ bool "Magic SysRq key" depends on DEBUG_KERNEL help If you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in . Don't say Y unless you really know what this hack does. config DEBUG_SPINLOCK bool "Spinlock debugging" depends on DEBUG_KERNEL help Say Y here and to CONFIG_SMP to include code to check for missing spinlock initialization and some other common spinlock errors. config DEBUG_HIGHMEM bool "Highmem debugging" depends on DEBUG_KERNEL && HIGHMEM help This options enables additional error checking for high memory systems. Disable for production systems. config DEBUG_SPINLOCK_SLEEP bool "Sleep-inside-spinlock checking" depends on DEBUG_KERNEL help If you say Y here, various routines which may sleep will become very noisy if they are called with a spinlock held. config KGDB bool "Include kgdb kernel debugger" depends on DEBUG_KERNEL select DEBUG_INFO help Include in-kernel hooks for kgdb, the Linux kernel source level debugger. See for more information. Unless you are intending to debug the kernel, say N here. choice prompt "Serial Port" depends on KGDB default KGDB_TTYS1 config KGDB_TTYS0 bool "ttyS0" config KGDB_TTYS1 bool "ttyS1" config KGDB_TTYS2 bool "ttyS2" config KGDB_TTYS3 bool "ttyS3" endchoice config KGDB_CONSOLE bool "Enable serial console thru kgdb port" depends on KGDB && 8xx || 8260 help If you enable this, all serial console messages will be sent over the gdb stub. If unsure, say N. config XMON bool "Include xmon kernel debugger" depends on DEBUG_KERNEL help Include in-kernel hooks for the xmon kernel monitor/debugger. Unless you are intending to debug the kernel, say N here. config BDI_SWITCH bool "Include BDI-2000 user context switcher" depends on DEBUG_KERNEL help Include in-kernel support for the Abatron BDI2000 debugger. Unless you are intending to debug the kernel with one of these machines, say N here. config DEBUG_INFO bool "Compile the kernel with debug info" depends on DEBUG_KERNEL help If you say Y here the resulting kernel image will include debugging info resulting in a larger kernel image. Say Y here only if you plan to use some sort of debugger to debug the kernel. If you don't debug the kernel, you can say N. config BOOTX_TEXT bool "Support for early boot text console (BootX or OpenFirmware only)" depends PPC_OF help Say Y here to see progress messages from the boot firmware in text mode. Requires either BootX or Open Firmware. config SERIAL_TEXT_DEBUG bool "Support for early boot texts over serial port" depends on 4xx || GT64260 || LOPEC || PPLUS || PRPMC800 || PPC_GEN550 config OCP bool depends on IBM_OCP default y endmenu source "security/Kconfig" source "crypto/Kconfig"