# For a description of the syntax of this configuration file, # see Documentation/kbuild/kconfig-language.txt. # mainmenu "Linux/PowerPC Kernel Configuration" config PPC64 bool "64-bit kernel" default n help This option selects whether a 32-bit or a 64-bit kernel will be built. config PPC32 bool default y if !PPC64 config 64BIT bool default y if PPC64 config PPC_MERGE def_bool y config MMU bool default y config UID16 bool config GENERIC_HARDIRQS bool default y config RWSEM_GENERIC_SPINLOCK bool config RWSEM_XCHGADD_ALGORITHM bool default y config GENERIC_CALIBRATE_DELAY bool default y config PPC bool default y config EARLY_PRINTK bool default y if PPC64 config COMPAT bool default y if PPC64 config SYSVIPC_COMPAT bool depends on COMPAT && SYSVIPC default y # All PPC32s use generic nvram driver through ppc_md config GENERIC_NVRAM bool default y if PPC32 config SCHED_NO_NO_OMIT_FRAME_POINTER bool default y config ARCH_MAY_HAVE_PC_FDC bool default y menu "Processor support" choice prompt "Processor Type" depends on PPC32 default 6xx config 6xx bool "6xx/7xx/74xx" select PPC_FPU help There are four families of PowerPC chips supported. The more common types (601, 603, 604, 740, 750, 7400), the Motorola embedded versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC embedded versions (403 and 405) and the high end 64 bit Power processors (POWER 3, POWER4, and IBM PPC970 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. config PPC_52xx bool "Freescale 52xx" config PPC_82xx bool "Freescale 82xx" config PPC_83xx bool "Freescale 83xx" config 40x bool "AMCC 40x" config 44x bool "AMCC 44x" config 8xx bool "Freescale 8xx" config E200 bool "Freescale e200" config E500 bool "Freescale e500" endchoice config POWER4_ONLY bool "Optimize for POWER4" depends on PPC64 default n ---help--- Cause the compiler to optimize for POWER4/POWER5/PPC970 processors. The resulting binary will not work on POWER3 or RS64 processors when compiled with binutils 2.15 or later. config POWER3 bool depends on PPC64 default y if !POWER4_ONLY config POWER4 depends on PPC64 def_bool y config PPC_FPU bool default y if PPC64 config BOOKE bool depends on E200 || E500 default y config FSL_BOOKE bool depends on E200 || E500 default y config PTE_64BIT bool depends on 44x || E500 default y if 44x default y if E500 && PHYS_64BIT config PHYS_64BIT bool 'Large physical address support' if E500 depends on 44x || E500 default y if 44x ---help--- This option enables kernel support for larger than 32-bit physical addresses. This features is not be available on all e500 cores. If in doubt, say N here. config ALTIVEC bool "AltiVec Support" depends on 6xx || POWER4 ---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 SPE bool "SPE Support" depends on E200 || E500 ---help--- This option enables kernel support for the Signal Processing Extensions (SPE) to the PowerPC processor. The kernel currently supports saving and restoring SPE registers, and turning on the 'spe enable' bit so user processes can execute SPE instructions. This option is only useful if you have a processor that supports SPE (e500, otherwise known as 85xx series), but does not have any effect on a non-spe cpu (it does, however add code to the kernel). If in doubt, say Y here. config PPC_STD_MMU bool depends on 6xx || POWER3 || POWER4 || PPC64 default y config PPC_STD_MMU_32 def_bool y depends on PPC_STD_MMU && PPC32 config SMP depends on PPC_STD_MMU 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 NR_CPUS int "Maximum number of CPUs (2-128)" range 2 128 depends on SMP default "32" if PPC64 default "4" config NOT_COHERENT_CACHE bool depends on 4xx || 8xx || E200 default y endmenu source "init/Kconfig" menu "Platform support" depends on PPC64 || 6xx choice prompt "Machine type" default PPC_MULTIPLATFORM config PPC_MULTIPLATFORM bool "Generic desktop/server/laptop" help Select this option if configuring for an IBM pSeries or RS/6000 machine, an Apple machine, or a PReP, CHRP, Maple or Cell-based machine. config PPC_ISERIES bool "IBM Legacy iSeries" depends on PPC64 config EMBEDDED6xx bool "Embedded 6xx/7xx/7xxx-based board" depends on PPC32 && BROKEN config APUS bool "Amiga-APUS" depends on PPC32 && BROKEN help Select APUS if configuring for a PowerUP Amiga. More information is available at: . endchoice config PPC_PSERIES depends on PPC_MULTIPLATFORM && PPC64 bool " IBM pSeries & new (POWER5-based) iSeries" select PPC_I8259 select PPC_RTAS select RTAS_ERROR_LOGGING default y config PPC_CHRP bool " Common Hardware Reference Platform (CHRP) based machines" depends on PPC_MULTIPLATFORM && PPC32 select PPC_I8259 select PPC_INDIRECT_PCI select PPC_RTAS select PPC_MPC106 default y config PPC_PMAC bool " Apple PowerMac based machines" depends on PPC_MULTIPLATFORM select PPC_INDIRECT_PCI if PPC32 select PPC_MPC106 if PPC32 default y config PPC_PMAC64 bool depends on PPC_PMAC && POWER4 select U3_DART select GENERIC_TBSYNC default y config PPC_PREP bool " PowerPC Reference Platform (PReP) based machines" depends on PPC_MULTIPLATFORM && PPC32 && BROKEN select PPC_I8259 select PPC_INDIRECT_PCI default y config PPC_MAPLE depends on PPC_MULTIPLATFORM && PPC64 bool " Maple 970FX Evaluation Board" select U3_DART select MPIC_BROKEN_U3 select GENERIC_TBSYNC default n help This option enables support for the Maple 970FX Evaluation Board. For more informations, refer to config PPC_CELL bool " Cell Broadband Processor Architecture" depends on PPC_MULTIPLATFORM && PPC64 select PPC_RTAS select MMIO_NVRAM config PPC_OF bool depends on PPC_MULTIPLATFORM # for now default y config XICS depends on PPC_PSERIES bool default y config U3_DART bool depends on PPC_MULTIPLATFORM && PPC64 default n config MPIC depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE || PPC_CHRP bool default y config PPC_RTAS bool default n config RTAS_ERROR_LOGGING bool depends on PPC_RTAS default n config RTAS_PROC bool "Proc interface to RTAS" depends on PPC_RTAS default y config RTAS_FLASH tristate "Firmware flash interface" depends on PPC64 && RTAS_PROC config MMIO_NVRAM bool default n config MPIC_BROKEN_U3 bool depends on PPC_MAPLE default y config CELL_IIC depends on PPC_CELL bool default y config IBMVIO depends on PPC_PSERIES || PPC_ISERIES bool default y config IBMEBUS depends on PPC_PSERIES bool "Support for GX bus based adapters" default y help Bus device driver for GX bus based adapters. config PPC_MPC106 bool default n config GENERIC_TBSYNC bool default y if CONFIG_PPC32 && CONFIG_SMP default n source "drivers/cpufreq/Kconfig" config CPU_FREQ_PMAC bool "Support for Apple PowerBooks" depends on CPU_FREQ && ADB_PMU && PPC32 select CPU_FREQ_TABLE help This adds support for frequency switching on Apple PowerBooks, this currently includes some models of iBook & Titanium PowerBook. config CPU_FREQ_PMAC64 bool "Support for some Apple G5s" depends on CPU_FREQ && PMAC_SMU && PPC64 select CPU_FREQ_TABLE help This adds support for frequency switching on Apple iMac G5, and some of the more recent desktop G5 machines as well. 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. config TAU bool "Thermal Management Support" depends on 6xx 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. endmenu source arch/powerpc/platforms/embedded6xx/Kconfig source arch/powerpc/platforms/4xx/Kconfig source arch/powerpc/platforms/85xx/Kconfig source arch/powerpc/platforms/8xx/Kconfig source arch/powerpc/platforms/cell/Kconfig menu "Kernel options" config HIGHMEM bool "High memory support" depends on PPC32 source kernel/Kconfig.hz source kernel/Kconfig.preempt source "fs/Kconfig.binfmt" # We optimistically allocate largepages from the VM, so make the limit # large enough (16MB). This badly named config option is actually # max order + 1 config FORCE_MAX_ZONEORDER int depends on PPC64 default "9" if PPC_64K_PAGES default "13" config MATH_EMULATION bool "Math emulation" depends on 4xx || 8xx || E200 || E500 ---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. config IOMMU_VMERGE bool "Enable IOMMU virtual merging (EXPERIMENTAL)" depends on EXPERIMENTAL && PPC64 default n help Cause IO segments sent to a device for DMA to be merged virtually by the IOMMU when they happen to have been allocated contiguously. This doesn't add pressure to the IOMMU allocator. However, some drivers don't support getting large merged segments coming back from *_map_sg(). Say Y if you know the drivers you are using are properly handling this case. config HOTPLUG_CPU bool "Support for enabling/disabling CPUs" depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) ---help--- Say Y here to be able to disable and re-enable individual CPUs at runtime on SMP machines. Say N if you are unsure. config KEXEC bool "kexec system call (EXPERIMENTAL)" depends on PPC_MULTIPLATFORM && EXPERIMENTAL help kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot but it is indepedent of the system firmware. And like a reboot you can start any kernel with it, not just Linux. The name comes from the similiarity to the exec system call. It is an ongoing process to be certain the hardware in a machine is properly shutdown, so do not be surprised if this code does not initially work for you. It may help to enable device hotplugging support. As of this writing the exact hardware interface is strongly in flux, so no good recommendation can be made. config EMBEDDEDBOOT bool depends on 8xx || 8260 default y config PC_KEYBOARD bool "PC PS/2 style Keyboard" depends on 4xx || CPM2 config PPCBUG_NVRAM bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC default y if PPC_PREP config IRQ_ALL_CPUS bool "Distribute interrupts on all CPUs by default" depends on SMP && !MV64360 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. source "arch/powerpc/platforms/pseries/Kconfig" config NUMA bool "NUMA support" depends on PPC64 default y if SMP && PPC_PSERIES config ARCH_SELECT_MEMORY_MODEL def_bool y depends on PPC64 config ARCH_FLATMEM_ENABLE def_bool y depends on PPC64 && !NUMA config ARCH_SPARSEMEM_ENABLE def_bool y config ARCH_SPARSEMEM_DEFAULT def_bool y depends on SMP && PPC_PSERIES source "mm/Kconfig" config HAVE_ARCH_EARLY_PFN_TO_NID def_bool y depends on NEED_MULTIPLE_NODES config ARCH_MEMORY_PROBE def_bool y depends on MEMORY_HOTPLUG config PPC_64K_PAGES bool "64k page size" depends on PPC64 help This option changes the kernel logical page size to 64k. On machines without processor support for 64k pages, the kernel will simulate them by loading each individual 4k page on demand transparently, while on hardware with such support, it will be used to map normal application pages. config SCHED_SMT bool "SMT (Hyperthreading) scheduler support" depends on PPC64 && SMP default off help SMT scheduler support improves the CPU scheduler's decision making when dealing with POWER5 cpus at a cost of slightly increased overhead in some places. If unsure say N here. config PROC_DEVICETREE bool "Support for device tree in /proc" depends on 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 or other boot firmware. If unsure, say Y here. source "arch/powerpc/platforms/prep/Kconfig" config CMDLINE_BOOL bool "Default bootloader kernel arguments" depends on !PPC_ISERIES 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. if !44x || BROKEN source kernel/power/Kconfig endif config SECCOMP bool "Enable seccomp to safely compute untrusted bytecode" depends on PROC_FS default y help This kernel feature is useful for number crunching applications that may need to compute untrusted bytecode during their execution. By using pipes or other transports made available to the process as file descriptors supporting the read/write syscalls, it's possible to isolate those applications in their own address space using seccomp. Once seccomp is enabled via /proc//seccomp, it cannot be disabled and the task is only allowed to execute a few safe syscalls defined by each seccomp mode. If unsure, say Y. Only embedded should say N here. endmenu config ISA_DMA_API bool default y menu "Bus options" config ISA bool "Support for ISA-bus hardware" depends on PPC_PREP || PPC_CHRP select PPC_I8259 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 PPC64 || POWER4 || 6xx && !CPM2 default y config PPC_I8259 bool default y if 85xx default n config PPC_INDIRECT_PCI bool depends on PCI default y if 40x || 44x || 85xx || 83xx default n config EISA bool 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 || CPM2 || 83xx || 85xx || PPC_MPC52xx || (EMBEDDED && PPC_ISERIES) default y if !40x && !CPM2 && !8xx && !APUS && !83xx && !85xx default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS default PCI_QSPAN if !4xx && !CPM2 && 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 MPC83xx_PCI2 bool " Supprt for 2nd PCI host controller" depends on PCI && MPC834x default y if MPC834x_SYS config PCI_QSPAN bool "QSpan PCI" depends on !4xx && !CPM2 && 8xx select PPC_I8259 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_8260 bool depends on PCI && 8260 select PPC_INDIRECT_PCI default y config 8260_PCI9 bool " Enable workaround for MPC826x erratum PCI 9" depends on PCI_8260 && !ADS8272 default y choice prompt " IDMA channel for PCI 9 workaround" depends on 8260_PCI9 config 8260_PCI9_IDMA1 bool "IDMA1" config 8260_PCI9_IDMA2 bool "IDMA2" config 8260_PCI9_IDMA3 bool "IDMA3" config 8260_PCI9_IDMA4 bool "IDMA4" endchoice source "drivers/pci/Kconfig" source "drivers/pcmcia/Kconfig" source "drivers/pci/hotplug/Kconfig" endmenu menu "Advanced setup" depends on PPC32 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 CONSISTENT_START_BOOL bool "Set custom consistent memory pool address" depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE help This option allows you to set the base virtual address of the the consistent memory pool. This pool of virtual memory is used to make consistent memory allocations. config CONSISTENT_START hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL default "0xff100000" if NOT_COHERENT_CACHE config CONSISTENT_SIZE_BOOL bool "Set custom consistent memory pool size" depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE help This option allows you to set the size of the the consistent memory pool. This pool of virtual memory is used to make consistent memory allocations. config CONSISTENT_SIZE hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL default "0x00200000" if NOT_COHERENT_CACHE 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 if PPC64 config KERNEL_START hex default "0xc000000000000000" endif source "net/Kconfig" source "drivers/Kconfig" source "fs/Kconfig" # XXX source "arch/ppc/8xx_io/Kconfig" # XXX source "arch/ppc/8260_io/Kconfig" source "arch/powerpc/platforms/iseries/Kconfig" source "lib/Kconfig" menu "Instrumentation Support" depends on EXPERIMENTAL source "arch/powerpc/oprofile/Kconfig" config KPROBES bool "Kprobes (EXPERIMENTAL)" depends on PPC64 help Kprobes allows you to trap at almost any kernel address and execute a callback function. register_kprobe() establishes a probepoint and specifies the callback. Kprobes is useful for kernel debugging, non-intrusive instrumentation and testing. If in doubt, say "N". endmenu source "arch/powerpc/Kconfig.debug" source "security/Kconfig" config KEYS_COMPAT bool depends on COMPAT && KEYS default y source "crypto/Kconfig"