kconfig
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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.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.if !44x || BROKENsource kernel/power/Kconfigendifconfig 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/<pid>/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.config WANT_DEVICE_TREE bool default nconfig DEVICE_TREE string "Static device tree source file" depends on WANT_DEVICE_TREE help This specifies the device tree source (.dts) file to be compiled and included when building the bootwrapper. If a relative filename is given, then it will be relative to arch/powerpc/boot/dts. If you are not using the bootwrapper, or do not need to build a dts into the bootwrapper, this field is ignored. For example, this is required when building a cuImage target for an older U-Boot, which cannot pass a device tree itself. Such a kernel will not work with a newer U-Boot that tries to pass a device tree (unless you tell it not to). If your U-Boot does not mention a device tree in "help bootm", then use the cuImage target and specify a device tree here. Otherwise, use the uImage target and leave this field blank.endmenuconfig ISA_DMA_API bool default ymenu "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 ZONE_DMA bool default yconfig GENERIC_ISA_DMA bool depends on PPC64 || POWER4 || 6xx && !CPM2 default yconfig PPC_INDIRECT_PCI bool depends on PCI default y if 40x || 44x default nconfig EISA boolconfig SBUS boolconfig FSL_SOC boolconfig FSL_PCI bool select PPC_INDIRECT_PCI# Yes MCA RS/6000s exist but Linux-PPC does not currently support anyconfig MCA boolconfig PCI bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \ || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \ || PPC_PS3 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ && !PPC_85xx && !PPC_86xx default PCI_PERMEDIA if !4xx && !CPM2 && !8xx default PCI_QSPAN if !4xx && !CPM2 && 8xx select ARCH_SUPPORTS_MSI 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 def_bool PCIconfig PCI_SYSCALL def_bool PCIconfig 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 yconfig 8260_PCI9 bool "Enable workaround for MPC826x erratum PCI 9" depends on PCI_8260 && !8272 default ychoice prompt "IDMA channel for PCI 9 workaround" depends on 8260_PCI9config 8260_PCI9_IDMA1 bool "IDMA1"config 8260_PCI9_IDMA2 bool "IDMA2"config 8260_PCI9_IDMA3 bool "IDMA3"config 8260_PCI9_IDMA4 bool "IDMA4"endchoicesource "drivers/pci/pcie/Kconfig"source "drivers/pci/Kconfig"source "drivers/pcmcia/Kconfig"source "drivers/pci/hotplug/Kconfig"endmenumenu "Advanced setup" depends on PPC32config 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_OPTIONSconfig 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" if PPC_PREP || PPC_8xx default "0xc0000000"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 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 "0xfd000000" if (NOT_COHERENT_CACHE && 8xx) default "0xff100000" if NOT_COHERENT_CACHEconfig 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 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_CACHEconfig 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 && 8xxendmenuif PPC64config KERNEL_START hex default "0xc000000000000000"endifsource "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/sysdev/qe_lib/Kconfig"source "lib/Kconfig"source "kernel/Kconfig.instrumentation"source "arch/powerpc/Kconfig.debug"source "security/Kconfig"config KEYS_COMPAT bool depends on COMPAT && KEYS default ysource "crypto/Kconfig"config PPC_CLOCK bool default nconfig PPC_LIB_RHEAP bool
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