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authorroot <root@artemis.panaceas.org>2015-12-25 04:40:36 +0000
committerroot <root@artemis.panaceas.org>2015-12-25 04:40:36 +0000
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tree6135abc790ca67dedbe07c39806591e70eda81ce /arch/powerpc/Kconfig
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+source "arch/powerpc/platforms/Kconfig.cputype"
+
+config PPC32
+ bool
+ default y if !PPC64
+
+config 32BIT
+ bool
+ default y if PPC32
+
+config 64BIT
+ bool
+ default y if PPC64
+
+config WORD_SIZE
+ int
+ default 64 if PPC64
+ default 32 if !PPC64
+
+config ARCH_PHYS_ADDR_T_64BIT
+ def_bool PPC64 || PHYS_64BIT
+
+config ARCH_DMA_ADDR_T_64BIT
+ def_bool ARCH_PHYS_ADDR_T_64BIT
+
+config MMU
+ bool
+ default y
+
+config GENERIC_CMOS_UPDATE
+ def_bool y
+
+config GENERIC_TIME_VSYSCALL
+ def_bool y
+
+config GENERIC_CLOCKEVENTS
+ def_bool y
+
+config HAVE_SETUP_PER_CPU_AREA
+ def_bool PPC64
+
+config NEED_PER_CPU_EMBED_FIRST_CHUNK
+ def_bool PPC64
+
+config NR_IRQS
+ int "Number of virtual interrupt numbers"
+ range 32 32768
+ default "512"
+ help
+ This defines the number of virtual interrupt numbers the kernel
+ can manage. Virtual interrupt numbers are what you see in
+ /proc/interrupts. If you configure your system to have too few,
+ drivers will fail to load or worse - handle with care.
+
+config STACKTRACE_SUPPORT
+ bool
+ default y
+
+config HAVE_LATENCYTOP_SUPPORT
+ def_bool y
+
+config TRACE_IRQFLAGS_SUPPORT
+ bool
+ default y
+
+config LOCKDEP_SUPPORT
+ bool
+ default y
+
+config RWSEM_GENERIC_SPINLOCK
+ bool
+
+config RWSEM_XCHGADD_ALGORITHM
+ bool
+ default y
+
+config GENERIC_LOCKBREAK
+ bool
+ default y
+ depends on SMP && PREEMPT
+
+config ARCH_HAS_ILOG2_U32
+ bool
+ default y
+
+config ARCH_HAS_ILOG2_U64
+ bool
+ default y if 64BIT
+
+config GENERIC_HWEIGHT
+ bool
+ default y
+
+config GENERIC_GPIO
+ bool
+ help
+ Generic GPIO API support
+
+config ARCH_NO_VIRT_TO_BUS
+ def_bool PPC64
+
+config PPC
+ bool
+ default y
+ select OF
+ select OF_EARLY_FLATTREE
+ select HAVE_FTRACE_MCOUNT_RECORD
+ select HAVE_DYNAMIC_FTRACE
+ select HAVE_FUNCTION_TRACER
+ select HAVE_FUNCTION_GRAPH_TRACER
+ select ARCH_WANT_OPTIONAL_GPIOLIB
+ select HAVE_IDE
+ select HAVE_IOREMAP_PROT
+ select HAVE_EFFICIENT_UNALIGNED_ACCESS
+ select HAVE_KPROBES
+ select HAVE_ARCH_KGDB
+ select HAVE_KRETPROBES
+ select HAVE_ARCH_TRACEHOOK
+ select HAVE_MEMBLOCK
+ select HAVE_DMA_ATTRS
+ select HAVE_DMA_API_DEBUG
+ select USE_GENERIC_SMP_HELPERS if SMP
+ select HAVE_OPROFILE
+ select HAVE_SYSCALL_WRAPPERS if PPC64
+ select GENERIC_ATOMIC64 if PPC32
+ select HAVE_IRQ_WORK
+ select HAVE_PERF_EVENTS
+ select HAVE_REGS_AND_STACK_ACCESS_API
+ select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
+ select HAVE_GENERIC_HARDIRQS
+ select HAVE_SPARSE_IRQ
+ select IRQ_PER_CPU
+ select GENERIC_IRQ_SHOW
+ select GENERIC_IRQ_SHOW_LEVEL
+ select HAVE_RCU_TABLE_FREE if SMP
+ select HAVE_SYSCALL_TRACEPOINTS
+
+config EARLY_PRINTK
+ bool
+ default y
+
+config COMPAT
+ bool
+ default y if PPC64
+ select COMPAT_BINFMT_ELF
+
+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_OMIT_FRAME_POINTER
+ bool
+ default y
+
+config ARCH_MAY_HAVE_PC_FDC
+ bool
+ default !PPC_PSERIES || PCI
+
+config PPC_OF
+ def_bool y
+
+config PPC_UDBG_16550
+ bool
+ default n
+
+config GENERIC_TBSYNC
+ bool
+ default y if PPC32 && SMP
+ default n
+
+config AUDIT_ARCH
+ bool
+ default y
+
+config GENERIC_BUG
+ bool
+ default y
+ depends on BUG
+
+config SYS_SUPPORTS_APM_EMULATION
+ default y if PMAC_APM_EMU
+ bool
+
+config EPAPR_BOOT
+ bool
+ help
+ Used to allow a board to specify it wants an ePAPR compliant wrapper.
+ default n
+
+config DEFAULT_UIMAGE
+ bool
+ help
+ Used to allow a board to specify it wants a uImage built by default
+ default n
+
+config REDBOOT
+ bool
+
+config ARCH_HIBERNATION_POSSIBLE
+ bool
+ default y
+
+config ARCH_SUSPEND_POSSIBLE
+ def_bool y
+ depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
+ (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x
+
+config PPC_DCR_NATIVE
+ bool
+ default n
+
+config PPC_DCR_MMIO
+ bool
+ default n
+
+config PPC_DCR
+ bool
+ depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
+ default y
+
+config PPC_OF_PLATFORM_PCI
+ bool
+ depends on PCI
+ depends on PPC64 # not supported on 32 bits yet
+ default n
+
+config ARCH_SUPPORTS_DEBUG_PAGEALLOC
+ def_bool y
+
+config PPC_ADV_DEBUG_REGS
+ bool
+ depends on 40x || BOOKE
+ default y
+
+config PPC_ADV_DEBUG_IACS
+ int
+ depends on PPC_ADV_DEBUG_REGS
+ default 4 if 44x
+ default 2
+
+config PPC_ADV_DEBUG_DACS
+ int
+ depends on PPC_ADV_DEBUG_REGS
+ default 2
+
+config PPC_ADV_DEBUG_DVCS
+ int
+ depends on PPC_ADV_DEBUG_REGS
+ default 2 if 44x
+ default 0
+
+config PPC_ADV_DEBUG_DAC_RANGE
+ bool
+ depends on PPC_ADV_DEBUG_REGS && 44x
+ default y
+
+source "init/Kconfig"
+
+source "kernel/Kconfig.freezer"
+
+source "arch/powerpc/sysdev/Kconfig"
+source "arch/powerpc/platforms/Kconfig"
+
+menu "Kernel options"
+
+config HIGHMEM
+ bool "High memory support"
+ depends on PPC32
+
+source kernel/time/Kconfig
+source kernel/Kconfig.hz
+source kernel/Kconfig.preempt
+source "fs/Kconfig.binfmt"
+
+config HUGETLB_PAGE_SIZE_VARIABLE
+ bool
+ depends on HUGETLB_PAGE
+ default y
+
+config MATH_EMULATION
+ bool "Math emulation"
+ depends on 4xx || 8xx || E200 || PPC_MPC832x || 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 8XX_MINIMAL_FPEMU
+ bool "Minimal math emulation for 8xx"
+ depends on 8xx && !MATH_EMULATION
+ help
+ Older arch/ppc kernels still emulated a few floating point
+ instructions such as load and store, even when full math
+ emulation is disabled. Say "Y" here if you want to preserve
+ this behavior.
+
+ It is recommended that you build a soft-float userspace instead.
+
+config IOMMU_HELPER
+ def_bool PPC64
+
+config SWIOTLB
+ bool "SWIOTLB support"
+ default n
+ select IOMMU_HELPER
+ ---help---
+ Support for IO bounce buffering for systems without an IOMMU.
+ This allows us to DMA to the full physical address space on
+ platforms where the size of a physical address is larger
+ than the bus address. Not all platforms support this.
+
+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 ARCH_CPU_PROBE_RELEASE
+ def_bool y
+ depends on HOTPLUG_CPU
+
+config ARCH_ENABLE_MEMORY_HOTPLUG
+ def_bool y
+
+config ARCH_HAS_WALK_MEMORY
+ def_bool y
+
+config ARCH_ENABLE_MEMORY_HOTREMOVE
+ def_bool y
+
+config KEXEC
+ bool "kexec system call (EXPERIMENTAL)"
+ depends on (PPC_BOOK3S || FSL_BOOKE) && 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 independent of the system firmware. And like a reboot
+ you can start any kernel with it, not just Linux.
+
+ The name comes from the similarity 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 CRASH_DUMP
+ bool "Build a kdump crash kernel"
+ depends on PPC64 || 6xx || FSL_BOOKE
+ select RELOCATABLE if PPC64 || FSL_BOOKE
+ help
+ Build a kernel suitable for use as a kdump capture kernel.
+ The same kernel binary can be used as production kernel and dump
+ capture kernel.
+
+config PHYP_DUMP
+ bool "Hypervisor-assisted dump (EXPERIMENTAL)"
+ depends on PPC_PSERIES && EXPERIMENTAL
+ help
+ Hypervisor-assisted dump is meant to be a kdump replacement
+ offering robustness and speed not possible without system
+ hypervisor assistance.
+
+ If unsure, say "N"
+
+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.
+
+config NUMA
+ bool "NUMA support"
+ depends on PPC64
+ default y if SMP && PPC_PSERIES
+
+config NODES_SHIFT
+ int
+ default "8" if PPC64
+ default "4"
+ depends on NEED_MULTIPLE_NODES
+
+config MAX_ACTIVE_REGIONS
+ int
+ default "256" if PPC64
+ default "32"
+
+config ARCH_SELECT_MEMORY_MODEL
+ def_bool y
+ depends on PPC64
+
+config ARCH_FLATMEM_ENABLE
+ def_bool y
+ depends on (PPC64 && !NUMA) || PPC32
+
+config ARCH_SPARSEMEM_ENABLE
+ def_bool y
+ depends on PPC64
+ select SPARSEMEM_VMEMMAP_ENABLE
+
+config ARCH_SPARSEMEM_DEFAULT
+ def_bool y
+ depends on (SMP && PPC_PSERIES) || PPC_PS3
+
+config ARCH_POPULATES_NODE_MAP
+ def_bool y
+
+config SYS_SUPPORTS_HUGETLBFS
+ def_bool y
+ depends on PPC_BOOK3S_64
+
+source "mm/Kconfig"
+
+config ARCH_MEMORY_PROBE
+ def_bool y
+ depends on MEMORY_HOTPLUG
+
+# Some NUMA nodes have memory ranges that span
+# other nodes. Even though a pfn is valid and
+# between a node's start and end pfns, it may not
+# reside on that node. See memmap_init_zone()
+# for details.
+config NODES_SPAN_OTHER_NODES
+ def_bool y
+ depends on NEED_MULTIPLE_NODES
+
+config PPC_HAS_HASH_64K
+ bool
+ depends on PPC64
+ default n
+
+config STDBINUTILS
+ bool "Using standard binutils settings"
+ depends on 44x
+ default y
+ help
+ Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
+ Note, that kernel will be able to run only those applications,
+ which had been compiled using binutils later than 2.17.50.0.3 with
+ '-zmax-page-size' set to 256K (the default is 64K). Or, if using
+ the older binutils, you can patch them with a trivial patch, which
+ changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
+
+choice
+ prompt "Page size"
+ default PPC_4K_PAGES
+ help
+ Select the kernel logical page size. Increasing the page size
+ will reduce software overhead at each page boundary, allow
+ hardware prefetch mechanisms to be more effective, and allow
+ larger dma transfers increasing IO efficiency and reducing
+ overhead. However the utilization of memory will increase.
+ For example, each cached file will using a multiple of the
+ page size to hold its contents and the difference between the
+ end of file and the end of page is wasted.
+
+ Some dedicated systems, such as software raid serving with
+ accelerated calculations, have shown significant increases.
+
+ If you configure a 64 bit kernel for 64k pages but the
+ processor does not support them, then the kernel will simulate
+ them with 4k pages, loading them on demand, but with the
+ reduced software overhead and larger internal fragmentation.
+ For the 32 bit kernel, a large page option will not be offered
+ unless it is supported by the configured processor.
+
+ If unsure, choose 4K_PAGES.
+
+config PPC_4K_PAGES
+ bool "4k page size"
+
+config PPC_16K_PAGES
+ bool "16k page size" if 44x
+
+config PPC_64K_PAGES
+ bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
+ select PPC_HAS_HASH_64K if PPC_STD_MMU_64
+
+config PPC_256K_PAGES
+ bool "256k page size" if 44x
+ depends on !STDBINUTILS
+ help
+ Make the page size 256k.
+
+ As the ELF standard only requires alignment to support page
+ sizes up to 64k, you will need to compile all of your user
+ space applications with a non-standard binutils settings
+ (see the STDBINUTILS description for details).
+
+ Say N unless you know what you are doing.
+
+endchoice
+
+config FORCE_MAX_ZONEORDER
+ int "Maximum zone order"
+ range 9 64 if PPC64 && PPC_64K_PAGES
+ default "9" if PPC64 && PPC_64K_PAGES
+ range 13 64 if PPC64 && !PPC_64K_PAGES
+ default "13" if PPC64 && !PPC_64K_PAGES
+ range 9 64 if PPC32 && PPC_16K_PAGES
+ default "9" if PPC32 && PPC_16K_PAGES
+ range 7 64 if PPC32 && PPC_64K_PAGES
+ default "7" if PPC32 && PPC_64K_PAGES
+ range 5 64 if PPC32 && PPC_256K_PAGES
+ default "5" if PPC32 && PPC_256K_PAGES
+ range 11 64
+ default "11"
+ help
+ The kernel memory allocator divides physically contiguous memory
+ blocks into "zones", where each zone is a power of two number of
+ pages. This option selects the largest power of two that the kernel
+ keeps in the memory allocator. If you need to allocate very large
+ blocks of physically contiguous memory, then you may need to
+ increase this value.
+
+ This config option is actually maximum order plus one. For example,
+ a value of 11 means that the largest free memory block is 2^10 pages.
+
+ The page size is not necessarily 4KB. For example, on 64-bit
+ systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
+ this in mind when choosing a value for this option.
+
+config PPC_SUBPAGE_PROT
+ bool "Support setting protections for 4k subpages"
+ depends on PPC_STD_MMU_64 && PPC_64K_PAGES
+ help
+ This option adds support for a system call to allow user programs
+ to set access permissions (read/write, readonly, or no access)
+ on the 4k subpages of each 64k page.
+
+config SCHED_SMT
+ bool "SMT (Hyperthreading) scheduler support"
+ depends on PPC64 && SMP
+ 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 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 EXTRA_TARGETS
+ string "Additional default image types"
+ help
+ List additional targets to be built by the bootwrapper here (separated
+ by spaces). This is useful for targets that depend of device tree
+ files in the .dts directory.
+
+ Targets in this list will be build as part of the default build
+ target, or when the user does a 'make zImage' or a
+ 'make zImage.initrd'.
+
+ If unsure, leave blank
+
+config ARCH_WANTS_FREEZER_CONTROL
+ def_bool y
+ depends on ADB_PMU
+
+source kernel/power/Kconfig
+
+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/<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.
+
+endmenu
+
+config ISA_DMA_API
+ bool
+ default !PPC_ISERIES || PCI
+
+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 ZONE_DMA
+ bool
+ default y
+
+config NEED_DMA_MAP_STATE
+ def_bool (PPC64 || NOT_COHERENT_CACHE)
+
+config NEED_SG_DMA_LENGTH
+ def_bool y
+
+config GENERIC_ISA_DMA
+ bool
+ depends on ISA_DMA_API
+ default y
+
+config PPC_INDIRECT_PCI
+ bool
+ depends on PCI
+ default y if 40x || 44x
+ default n
+
+config EISA
+ bool
+
+config SBUS
+ bool
+
+config FSL_SOC
+ bool
+
+config FSL_PCI
+ bool
+ select PPC_INDIRECT_PCI
+ select PCI_QUIRKS
+
+config FSL_PMC
+ bool
+ default y
+ depends on SUSPEND && (PPC_85xx || PPC_86xx)
+ help
+ Freescale MPC85xx/MPC86xx power management controller support
+ (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
+
+config PPC4xx_CPM
+ bool
+ default y
+ depends on SUSPEND && (44x || 40x)
+ help
+ PPC4xx Clock Power Management (CPM) support (suspend/resume).
+ It also enables support for two different idle states (idle-wait
+ and idle-doze).
+
+config 4xx_SOC
+ bool
+
+config FSL_LBC
+ bool "Freescale Local Bus support"
+ depends on FSL_SOC
+ help
+ Enables reporting of errors from the Freescale local bus
+ controller. Also contains some common code used by
+ drivers for specific local bus peripherals.
+
+config FSL_GTM
+ bool
+ depends on PPC_83xx || QUICC_ENGINE || CPM2
+ help
+ Freescale General-purpose Timers support
+
+# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
+config MCA
+ bool
+
+# Platforms that what PCI turned unconditionally just do select PCI
+# in their config node. Platforms that want to choose at config
+# time should select PPC_PCI_CHOICE
+config PPC_PCI_CHOICE
+ bool
+
+config PCI
+ bool "PCI support" if PPC_PCI_CHOICE
+ default y if !40x && !CPM2 && !8xx && !PPC_83xx \
+ && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
+ 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 PCI
+
+config PCI_SYSCALL
+ def_bool PCI
+
+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 && !8272
+ 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/pcie/Kconfig"
+
+source "drivers/pci/Kconfig"
+
+source "drivers/pcmcia/Kconfig"
+
+source "drivers/pci/hotplug/Kconfig"
+
+config HAS_RAPIDIO
+ bool
+ default n
+
+config RAPIDIO
+ bool "RapidIO support"
+ depends on HAS_RAPIDIO || PCI
+ help
+ If you say Y here, the kernel will include drivers and
+ infrastructure code to support RapidIO interconnect devices.
+
+config FSL_RIO
+ bool "Freescale Embedded SRIO Controller support"
+ depends on RAPIDIO && HAS_RAPIDIO
+ default "n"
+ ---help---
+ Include support for RapidIO controller on Freescale embedded
+ processors (MPC8548, MPC8641, etc).
+
+source "drivers/rapidio/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 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 LOWMEM_CAM_NUM_BOOL
+ bool "Set number of CAMs to use to map low memory"
+ depends on ADVANCED_OPTIONS && FSL_BOOKE
+ help
+ This option allows you to set the maximum number of CAM slots that
+ will be used to map low memory. There are a limited number of slots
+ available and even more limited number that will fit in the L1 MMU.
+ However, using more entries will allow mapping more low memory. This
+ can be useful in optimizing the layout of kernel virtual memory.
+
+ Say N here unless you know what you are doing.
+
+config LOWMEM_CAM_NUM
+ depends on FSL_BOOKE
+ int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
+ default 3
+
+config RELOCATABLE
+ bool "Build a relocatable kernel (EXPERIMENTAL)"
+ depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
+ help
+ This builds a kernel image that is capable of running at the
+ location the kernel is loaded at (some alignment restrictions may
+ exist).
+
+ One use is for the kexec on panic case where the recovery kernel
+ must live at a different physical address than the primary
+ kernel.
+
+ Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
+ it has been loaded at and the compile time physical addresses
+ CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
+ setting can still be useful to bootwrappers that need to know the
+ load location of the kernel (eg. u-boot/mkimage).
+
+config PAGE_OFFSET_BOOL
+ bool "Set custom page offset address"
+ depends on ADVANCED_OPTIONS
+ help
+ This option allows you to set the kernel virtual address at which
+ the kernel will map low memory. This can be useful in optimizing
+ the virtual memory layout of the system.
+
+ Say N here unless you know what you are doing.
+
+config PAGE_OFFSET
+ hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
+ default "0xc0000000"
+
+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 be loaded. Normally this should match PAGE_OFFSET
+ however there are times (like kdump) that one might not want them
+ to be the same.
+
+ Say N here unless you know what you are doing.
+
+config KERNEL_START
+ hex "Virtual address of kernel base" if KERNEL_START_BOOL
+ default PAGE_OFFSET if PAGE_OFFSET_BOOL
+ default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
+ default "0xc0000000"
+
+config PHYSICAL_START_BOOL
+ bool "Set physical address where the kernel is loaded"
+ depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
+ help
+ This gives the physical address where the kernel is loaded.
+
+ Say N here unless you know what you are doing.
+
+config PHYSICAL_START
+ hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
+ default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
+ default "0x00000000"
+
+config PHYSICAL_ALIGN
+ hex
+ default "0x04000000" if FSL_BOOKE
+ help
+ This value puts the alignment restrictions on physical address
+ where kernel is loaded and run from. Kernel is compiled for an
+ address which meets above alignment restriction.
+
+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_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_CACHE
+
+config PIN_TLB
+ bool "Pinned Kernel TLBs (860 ONLY)"
+ depends on ADVANCED_OPTIONS && 8xx
+endmenu
+
+if PPC64
+config RELOCATABLE
+ bool "Build a relocatable kernel"
+ help
+ This builds a kernel image that is capable of running anywhere
+ in the RMA (real memory area) at any 16k-aligned base address.
+ The kernel is linked as a position-independent executable (PIE)
+ and contains dynamic relocations which are processed early
+ in the bootup process.
+
+ One use is for the kexec on panic case where the recovery kernel
+ must live at a different physical address than the primary
+ kernel.
+
+config PAGE_OFFSET
+ hex
+ default "0xc000000000000000"
+config KERNEL_START
+ hex
+ default "0xc000000000000000"
+config PHYSICAL_START
+ hex
+ default "0x00000000"
+endif
+
+source "net/Kconfig"
+
+source "drivers/Kconfig"
+
+source "fs/Kconfig"
+
+source "arch/powerpc/sysdev/qe_lib/Kconfig"
+
+source "lib/Kconfig"
+
+source "arch/powerpc/Kconfig.debug"
+
+source "security/Kconfig"
+
+config KEYS_COMPAT
+ bool
+ depends on COMPAT && KEYS
+ default y
+
+source "crypto/Kconfig"
+
+config PPC_CLOCK
+ bool
+ default n
+ select HAVE_CLK
+
+config PPC_LIB_RHEAP
+ bool
+
+source "arch/powerpc/kvm/Kconfig"