Kconfig 23 KB

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  1. # For a description of the syntax of this configuration file,
  2. # see Documentation/kbuild/kconfig-language.txt.
  3. #
  4. mainmenu "Linux/PowerPC Kernel Configuration"
  5. source "arch/powerpc/platforms/Kconfig.cputype"
  6. config PPC32
  7. bool
  8. default y if !PPC64
  9. config 64BIT
  10. bool
  11. default y if PPC64
  12. config WORD_SIZE
  13. int
  14. default 64 if PPC64
  15. default 32 if !PPC64
  16. config ARCH_PHYS_ADDR_T_64BIT
  17. def_bool PPC64 || PHYS_64BIT
  18. config MMU
  19. bool
  20. default y
  21. config GENERIC_CMOS_UPDATE
  22. def_bool y
  23. config GENERIC_TIME
  24. def_bool y
  25. config GENERIC_TIME_VSYSCALL
  26. def_bool y
  27. config GENERIC_CLOCKEVENTS
  28. def_bool y
  29. config GENERIC_HARDIRQS
  30. bool
  31. default y
  32. config HAVE_SETUP_PER_CPU_AREA
  33. def_bool PPC64
  34. config IRQ_PER_CPU
  35. bool
  36. default y
  37. config STACKTRACE_SUPPORT
  38. bool
  39. default y
  40. config HAVE_LATENCYTOP_SUPPORT
  41. def_bool y
  42. config TRACE_IRQFLAGS_SUPPORT
  43. bool
  44. depends on PPC64
  45. default y
  46. config LOCKDEP_SUPPORT
  47. bool
  48. default y
  49. config RWSEM_GENERIC_SPINLOCK
  50. bool
  51. config RWSEM_XCHGADD_ALGORITHM
  52. bool
  53. default y
  54. config GENERIC_LOCKBREAK
  55. bool
  56. default y
  57. depends on SMP && PREEMPT
  58. config ARCH_HAS_ILOG2_U32
  59. bool
  60. default y
  61. config ARCH_HAS_ILOG2_U64
  62. bool
  63. default y if 64BIT
  64. config GENERIC_HWEIGHT
  65. bool
  66. default y
  67. config GENERIC_CALIBRATE_DELAY
  68. bool
  69. default y
  70. config GENERIC_FIND_NEXT_BIT
  71. bool
  72. default y
  73. config GENERIC_GPIO
  74. bool
  75. help
  76. Generic GPIO API support
  77. config ARCH_NO_VIRT_TO_BUS
  78. def_bool PPC64
  79. config PPC
  80. bool
  81. default y
  82. select HAVE_FTRACE_MCOUNT_RECORD
  83. select HAVE_DYNAMIC_FTRACE
  84. select HAVE_FUNCTION_TRACER
  85. select HAVE_FUNCTION_GRAPH_TRACER if PPC64 || !DYNAMIC_FTRACE
  86. select ARCH_WANT_OPTIONAL_GPIOLIB
  87. select HAVE_IDE
  88. select HAVE_IOREMAP_PROT
  89. select HAVE_EFFICIENT_UNALIGNED_ACCESS
  90. select HAVE_KPROBES
  91. select HAVE_ARCH_KGDB
  92. select HAVE_KRETPROBES
  93. select HAVE_ARCH_TRACEHOOK
  94. select HAVE_LMB
  95. select HAVE_DMA_ATTRS if PPC64
  96. select USE_GENERIC_SMP_HELPERS if SMP
  97. select HAVE_OPROFILE
  98. select HAVE_SYSCALL_WRAPPERS if PPC64
  99. config EARLY_PRINTK
  100. bool
  101. default y
  102. config COMPAT
  103. bool
  104. default y if PPC64
  105. select COMPAT_BINFMT_ELF
  106. config SYSVIPC_COMPAT
  107. bool
  108. depends on COMPAT && SYSVIPC
  109. default y
  110. # All PPC32s use generic nvram driver through ppc_md
  111. config GENERIC_NVRAM
  112. bool
  113. default y if PPC32
  114. config SCHED_OMIT_FRAME_POINTER
  115. bool
  116. default y
  117. config ARCH_MAY_HAVE_PC_FDC
  118. bool
  119. default !PPC_PSERIES || PCI
  120. config PPC_OF
  121. def_bool y
  122. config OF
  123. def_bool y
  124. config PPC_UDBG_16550
  125. bool
  126. default n
  127. config GENERIC_TBSYNC
  128. bool
  129. default y if PPC32 && SMP
  130. default n
  131. config AUDIT_ARCH
  132. bool
  133. default y
  134. config GENERIC_BUG
  135. bool
  136. default y
  137. depends on BUG
  138. config SYS_SUPPORTS_APM_EMULATION
  139. default y if PMAC_APM_EMU
  140. bool
  141. config DEFAULT_UIMAGE
  142. bool
  143. help
  144. Used to allow a board to specify it wants a uImage built by default
  145. default n
  146. config REDBOOT
  147. bool
  148. config HIBERNATE_32
  149. bool
  150. depends on (PPC_PMAC && !SMP) || BROKEN
  151. default y
  152. config HIBERNATE_64
  153. bool
  154. depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
  155. default y
  156. config ARCH_HIBERNATION_POSSIBLE
  157. bool
  158. depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
  159. default y
  160. config ARCH_SUSPEND_POSSIBLE
  161. def_bool y
  162. depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
  163. config PPC_DCR_NATIVE
  164. bool
  165. default n
  166. config PPC_DCR_MMIO
  167. bool
  168. default n
  169. config PPC_DCR
  170. bool
  171. depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
  172. default y
  173. config PPC_OF_PLATFORM_PCI
  174. bool
  175. depends on PCI
  176. depends on PPC64 # not supported on 32 bits yet
  177. default n
  178. source "init/Kconfig"
  179. source "kernel/Kconfig.freezer"
  180. source "arch/powerpc/sysdev/Kconfig"
  181. source "arch/powerpc/platforms/Kconfig"
  182. menu "Kernel options"
  183. config HIGHMEM
  184. bool "High memory support"
  185. depends on PPC32
  186. source kernel/time/Kconfig
  187. source kernel/Kconfig.hz
  188. source kernel/Kconfig.preempt
  189. source "fs/Kconfig.binfmt"
  190. config HUGETLB_PAGE_SIZE_VARIABLE
  191. bool
  192. depends on HUGETLB_PAGE
  193. default y
  194. config MATH_EMULATION
  195. bool "Math emulation"
  196. depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
  197. ---help---
  198. Some PowerPC chips designed for embedded applications do not have
  199. a floating-point unit and therefore do not implement the
  200. floating-point instructions in the PowerPC instruction set. If you
  201. say Y here, the kernel will include code to emulate a floating-point
  202. unit, which will allow programs that use floating-point
  203. instructions to run.
  204. config 8XX_MINIMAL_FPEMU
  205. bool "Minimal math emulation for 8xx"
  206. depends on 8xx && !MATH_EMULATION
  207. help
  208. Older arch/ppc kernels still emulated a few floating point
  209. instructions such as load and store, even when full math
  210. emulation is disabled. Say "Y" here if you want to preserve
  211. this behavior.
  212. It is recommended that you build a soft-float userspace instead.
  213. config IOMMU_VMERGE
  214. bool "Enable IOMMU virtual merging"
  215. depends on PPC64
  216. default y
  217. help
  218. Cause IO segments sent to a device for DMA to be merged virtually
  219. by the IOMMU when they happen to have been allocated contiguously.
  220. This doesn't add pressure to the IOMMU allocator. However, some
  221. drivers don't support getting large merged segments coming back
  222. from *_map_sg().
  223. Most drivers don't have this problem; it is safe to say Y here.
  224. config IOMMU_HELPER
  225. def_bool PPC64
  226. config PPC_NEED_DMA_SYNC_OPS
  227. def_bool y
  228. depends on NOT_COHERENT_CACHE
  229. config HOTPLUG_CPU
  230. bool "Support for enabling/disabling CPUs"
  231. depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
  232. ---help---
  233. Say Y here to be able to disable and re-enable individual
  234. CPUs at runtime on SMP machines.
  235. Say N if you are unsure.
  236. config ARCH_ENABLE_MEMORY_HOTPLUG
  237. def_bool y
  238. config ARCH_HAS_WALK_MEMORY
  239. def_bool y
  240. config ARCH_ENABLE_MEMORY_HOTREMOVE
  241. def_bool y
  242. config KEXEC
  243. bool "kexec system call (EXPERIMENTAL)"
  244. depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
  245. help
  246. kexec is a system call that implements the ability to shutdown your
  247. current kernel, and to start another kernel. It is like a reboot
  248. but it is independent of the system firmware. And like a reboot
  249. you can start any kernel with it, not just Linux.
  250. The name comes from the similarity to the exec system call.
  251. It is an ongoing process to be certain the hardware in a machine
  252. is properly shutdown, so do not be surprised if this code does not
  253. initially work for you. It may help to enable device hotplugging
  254. support. As of this writing the exact hardware interface is
  255. strongly in flux, so no good recommendation can be made.
  256. config CRASH_DUMP
  257. bool "Build a kdump crash kernel"
  258. depends on PPC64 || 6xx
  259. select RELOCATABLE if PPC64
  260. help
  261. Build a kernel suitable for use as a kdump capture kernel.
  262. The same kernel binary can be used as production kernel and dump
  263. capture kernel.
  264. config PHYP_DUMP
  265. bool "Hypervisor-assisted dump (EXPERIMENTAL)"
  266. depends on PPC_PSERIES && EXPERIMENTAL
  267. help
  268. Hypervisor-assisted dump is meant to be a kdump replacement
  269. offering robustness and speed not possible without system
  270. hypervisor assistence.
  271. If unsure, say "N"
  272. config PPCBUG_NVRAM
  273. bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
  274. default y if PPC_PREP
  275. config IRQ_ALL_CPUS
  276. bool "Distribute interrupts on all CPUs by default"
  277. depends on SMP && !MV64360
  278. help
  279. This option gives the kernel permission to distribute IRQs across
  280. multiple CPUs. Saying N here will route all IRQs to the first
  281. CPU. Generally saying Y is safe, although some problems have been
  282. reported with SMP Power Macintoshes with this option enabled.
  283. config NUMA
  284. bool "NUMA support"
  285. depends on PPC64
  286. default y if SMP && PPC_PSERIES
  287. config NODES_SHIFT
  288. int
  289. default "4"
  290. depends on NEED_MULTIPLE_NODES
  291. config ARCH_SELECT_MEMORY_MODEL
  292. def_bool y
  293. depends on PPC64
  294. config ARCH_FLATMEM_ENABLE
  295. def_bool y
  296. depends on (PPC64 && !NUMA) || PPC32
  297. config ARCH_SPARSEMEM_ENABLE
  298. def_bool y
  299. depends on PPC64
  300. select SPARSEMEM_VMEMMAP_ENABLE
  301. config ARCH_SPARSEMEM_DEFAULT
  302. def_bool y
  303. depends on (SMP && PPC_PSERIES) || PPC_PS3
  304. config ARCH_POPULATES_NODE_MAP
  305. def_bool y
  306. source "mm/Kconfig"
  307. config ARCH_MEMORY_PROBE
  308. def_bool y
  309. depends on MEMORY_HOTPLUG
  310. # Some NUMA nodes have memory ranges that span
  311. # other nodes. Even though a pfn is valid and
  312. # between a node's start and end pfns, it may not
  313. # reside on that node. See memmap_init_zone()
  314. # for details.
  315. config NODES_SPAN_OTHER_NODES
  316. def_bool y
  317. depends on NEED_MULTIPLE_NODES
  318. config PPC_HAS_HASH_64K
  319. bool
  320. depends on PPC64
  321. default n
  322. choice
  323. prompt "Page size"
  324. default PPC_4K_PAGES
  325. help
  326. Select the kernel logical page size. Increasing the page size
  327. will reduce software overhead at each page boundary, allow
  328. hardware prefetch mechanisms to be more effective, and allow
  329. larger dma transfers increasing IO efficiency and reducing
  330. overhead. However the utilization of memory will increase.
  331. For example, each cached file will using a multiple of the
  332. page size to hold its contents and the difference between the
  333. end of file and the end of page is wasted.
  334. Some dedicated systems, such as software raid serving with
  335. accelerated calculations, have shown significant increases.
  336. If you configure a 64 bit kernel for 64k pages but the
  337. processor does not support them, then the kernel will simulate
  338. them with 4k pages, loading them on demand, but with the
  339. reduced software overhead and larger internal fragmentation.
  340. For the 32 bit kernel, a large page option will not be offered
  341. unless it is supported by the configured processor.
  342. If unsure, choose 4K_PAGES.
  343. config PPC_4K_PAGES
  344. bool "4k page size"
  345. config PPC_16K_PAGES
  346. bool "16k page size" if 44x
  347. config PPC_64K_PAGES
  348. bool "64k page size" if 44x || PPC_STD_MMU_64
  349. select PPC_HAS_HASH_64K if PPC_STD_MMU_64
  350. endchoice
  351. config FORCE_MAX_ZONEORDER
  352. int "Maximum zone order"
  353. range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
  354. default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
  355. range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
  356. default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
  357. range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
  358. default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
  359. range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
  360. default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
  361. range 11 64
  362. default "11"
  363. help
  364. The kernel memory allocator divides physically contiguous memory
  365. blocks into "zones", where each zone is a power of two number of
  366. pages. This option selects the largest power of two that the kernel
  367. keeps in the memory allocator. If you need to allocate very large
  368. blocks of physically contiguous memory, then you may need to
  369. increase this value.
  370. This config option is actually maximum order plus one. For example,
  371. a value of 11 means that the largest free memory block is 2^10 pages.
  372. The page size is not necessarily 4KB. For example, on 64-bit
  373. systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
  374. this in mind when choosing a value for this option.
  375. config PPC_SUBPAGE_PROT
  376. bool "Support setting protections for 4k subpages"
  377. depends on PPC_STD_MMU_64 && PPC_64K_PAGES
  378. help
  379. This option adds support for a system call to allow user programs
  380. to set access permissions (read/write, readonly, or no access)
  381. on the 4k subpages of each 64k page.
  382. config SCHED_SMT
  383. bool "SMT (Hyperthreading) scheduler support"
  384. depends on PPC64 && SMP
  385. help
  386. SMT scheduler support improves the CPU scheduler's decision making
  387. when dealing with POWER5 cpus at a cost of slightly increased
  388. overhead in some places. If unsure say N here.
  389. config PROC_DEVICETREE
  390. bool "Support for device tree in /proc"
  391. depends on PROC_FS
  392. help
  393. This option adds a device-tree directory under /proc which contains
  394. an image of the device tree that the kernel copies from Open
  395. Firmware or other boot firmware. If unsure, say Y here.
  396. config CMDLINE_BOOL
  397. bool "Default bootloader kernel arguments"
  398. config CMDLINE
  399. string "Initial kernel command string"
  400. depends on CMDLINE_BOOL
  401. default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
  402. help
  403. On some platforms, there is currently no way for the boot loader to
  404. pass arguments to the kernel. For these platforms, you can supply
  405. some command-line options at build time by entering them here. In
  406. most cases you will need to specify the root device here.
  407. config EXTRA_TARGETS
  408. string "Additional default image types"
  409. help
  410. List additional targets to be built by the bootwrapper here (separated
  411. by spaces). This is useful for targets that depend of device tree
  412. files in the .dts directory.
  413. Targets in this list will be build as part of the default build
  414. target, or when the user does a 'make zImage' or a
  415. 'make zImage.initrd'.
  416. If unsure, leave blank
  417. if !44x || BROKEN
  418. config ARCH_WANTS_FREEZER_CONTROL
  419. def_bool y
  420. depends on ADB_PMU
  421. source kernel/power/Kconfig
  422. endif
  423. config SECCOMP
  424. bool "Enable seccomp to safely compute untrusted bytecode"
  425. depends on PROC_FS
  426. default y
  427. help
  428. This kernel feature is useful for number crunching applications
  429. that may need to compute untrusted bytecode during their
  430. execution. By using pipes or other transports made available to
  431. the process as file descriptors supporting the read/write
  432. syscalls, it's possible to isolate those applications in
  433. their own address space using seccomp. Once seccomp is
  434. enabled via /proc/<pid>/seccomp, it cannot be disabled
  435. and the task is only allowed to execute a few safe syscalls
  436. defined by each seccomp mode.
  437. If unsure, say Y. Only embedded should say N here.
  438. endmenu
  439. config ISA_DMA_API
  440. bool
  441. default !PPC_ISERIES || PCI
  442. menu "Bus options"
  443. config ISA
  444. bool "Support for ISA-bus hardware"
  445. depends on PPC_PREP || PPC_CHRP
  446. select PPC_I8259
  447. help
  448. Find out whether you have ISA slots on your motherboard. ISA is the
  449. name of a bus system, i.e. the way the CPU talks to the other stuff
  450. inside your box. If you have an Apple machine, say N here; if you
  451. have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
  452. you have an embedded board, consult your board documentation.
  453. config ZONE_DMA
  454. bool
  455. default y
  456. config GENERIC_ISA_DMA
  457. bool
  458. depends on PPC64 || POWER4 || 6xx && !CPM2
  459. default y
  460. config PPC_INDIRECT_PCI
  461. bool
  462. depends on PCI
  463. default y if 40x || 44x
  464. default n
  465. config EISA
  466. bool
  467. config SBUS
  468. bool
  469. config FSL_SOC
  470. bool
  471. config FSL_PCI
  472. bool
  473. select PPC_INDIRECT_PCI
  474. select PCI_QUIRKS
  475. config 4xx_SOC
  476. bool
  477. config FSL_LBC
  478. bool
  479. help
  480. Freescale Localbus support
  481. config FSL_GTM
  482. bool
  483. depends on PPC_83xx || QUICC_ENGINE || CPM2
  484. help
  485. Freescale General-purpose Timers support
  486. # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
  487. config MCA
  488. bool
  489. # Platforms that what PCI turned unconditionally just do select PCI
  490. # in their config node. Platforms that want to choose at config
  491. # time should select PPC_PCI_CHOICE
  492. config PPC_PCI_CHOICE
  493. bool
  494. config PCI
  495. bool "PCI support" if PPC_PCI_CHOICE
  496. default y if !40x && !CPM2 && !8xx && !PPC_83xx \
  497. && !PPC_85xx && !PPC_86xx
  498. default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
  499. default PCI_QSPAN if !4xx && !CPM2 && 8xx
  500. select ARCH_SUPPORTS_MSI
  501. help
  502. Find out whether your system includes a PCI bus. PCI is the name of
  503. a bus system, i.e. the way the CPU talks to the other stuff inside
  504. your box. If you say Y here, the kernel will include drivers and
  505. infrastructure code to support PCI bus devices.
  506. config PCI_DOMAINS
  507. def_bool PCI
  508. config PCI_SYSCALL
  509. def_bool PCI
  510. config PCI_QSPAN
  511. bool "QSpan PCI"
  512. depends on !4xx && !CPM2 && 8xx
  513. select PPC_I8259
  514. help
  515. Say Y here if you have a system based on a Motorola 8xx-series
  516. embedded processor with a QSPAN PCI interface, otherwise say N.
  517. config PCI_8260
  518. bool
  519. depends on PCI && 8260
  520. select PPC_INDIRECT_PCI
  521. default y
  522. config 8260_PCI9
  523. bool "Enable workaround for MPC826x erratum PCI 9"
  524. depends on PCI_8260 && !8272
  525. default y
  526. choice
  527. prompt "IDMA channel for PCI 9 workaround"
  528. depends on 8260_PCI9
  529. config 8260_PCI9_IDMA1
  530. bool "IDMA1"
  531. config 8260_PCI9_IDMA2
  532. bool "IDMA2"
  533. config 8260_PCI9_IDMA3
  534. bool "IDMA3"
  535. config 8260_PCI9_IDMA4
  536. bool "IDMA4"
  537. endchoice
  538. source "drivers/pci/pcie/Kconfig"
  539. source "drivers/pci/Kconfig"
  540. source "drivers/pcmcia/Kconfig"
  541. source "drivers/pci/hotplug/Kconfig"
  542. config HAS_RAPIDIO
  543. bool
  544. default n
  545. config RAPIDIO
  546. bool "RapidIO support"
  547. depends on HAS_RAPIDIO
  548. help
  549. If you say Y here, the kernel will include drivers and
  550. infrastructure code to support RapidIO interconnect devices.
  551. source "drivers/rapidio/Kconfig"
  552. endmenu
  553. menu "Advanced setup"
  554. depends on PPC32
  555. config ADVANCED_OPTIONS
  556. bool "Prompt for advanced kernel configuration options"
  557. help
  558. This option will enable prompting for a variety of advanced kernel
  559. configuration options. These options can cause the kernel to not
  560. work if they are set incorrectly, but can be used to optimize certain
  561. aspects of kernel memory management.
  562. Unless you know what you are doing, say N here.
  563. comment "Default settings for advanced configuration options are used"
  564. depends on !ADVANCED_OPTIONS
  565. config LOWMEM_SIZE_BOOL
  566. bool "Set maximum low memory"
  567. depends on ADVANCED_OPTIONS
  568. help
  569. This option allows you to set the maximum amount of memory which
  570. will be used as "low memory", that is, memory which the kernel can
  571. access directly, without having to set up a kernel virtual mapping.
  572. This can be useful in optimizing the layout of kernel virtual
  573. memory.
  574. Say N here unless you know what you are doing.
  575. config LOWMEM_SIZE
  576. hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
  577. default "0x30000000"
  578. config LOWMEM_CAM_NUM_BOOL
  579. bool "Set number of CAMs to use to map low memory"
  580. depends on ADVANCED_OPTIONS && FSL_BOOKE
  581. help
  582. This option allows you to set the maximum number of CAM slots that
  583. will be used to map low memory. There are a limited number of slots
  584. available and even more limited number that will fit in the L1 MMU.
  585. However, using more entries will allow mapping more low memory. This
  586. can be useful in optimizing the layout of kernel virtual memory.
  587. Say N here unless you know what you are doing.
  588. config LOWMEM_CAM_NUM
  589. int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
  590. default 3
  591. config RELOCATABLE
  592. bool "Build a relocatable kernel (EXPERIMENTAL)"
  593. depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  594. help
  595. This builds a kernel image that is capable of running at the
  596. location the kernel is loaded at (some alignment restrictions may
  597. exist).
  598. One use is for the kexec on panic case where the recovery kernel
  599. must live at a different physical address than the primary
  600. kernel.
  601. Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
  602. it has been loaded at and the compile time physical addresses
  603. CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
  604. setting can still be useful to bootwrappers that need to know the
  605. load location of the kernel (eg. u-boot/mkimage).
  606. config PAGE_OFFSET_BOOL
  607. bool "Set custom page offset address"
  608. depends on ADVANCED_OPTIONS
  609. help
  610. This option allows you to set the kernel virtual address at which
  611. the kernel will map low memory. This can be useful in optimizing
  612. the virtual memory layout of the system.
  613. Say N here unless you know what you are doing.
  614. config PAGE_OFFSET
  615. hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
  616. default "0xc0000000"
  617. config KERNEL_START_BOOL
  618. bool "Set custom kernel base address"
  619. depends on ADVANCED_OPTIONS
  620. help
  621. This option allows you to set the kernel virtual address at which
  622. the kernel will be loaded. Normally this should match PAGE_OFFSET
  623. however there are times (like kdump) that one might not want them
  624. to be the same.
  625. Say N here unless you know what you are doing.
  626. config KERNEL_START
  627. hex "Virtual address of kernel base" if KERNEL_START_BOOL
  628. default PAGE_OFFSET if PAGE_OFFSET_BOOL
  629. default "0xc2000000" if CRASH_DUMP
  630. default "0xc0000000"
  631. config PHYSICAL_START_BOOL
  632. bool "Set physical address where the kernel is loaded"
  633. depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  634. help
  635. This gives the physical address where the kernel is loaded.
  636. Say N here unless you know what you are doing.
  637. config PHYSICAL_START
  638. hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
  639. default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
  640. default "0x00000000"
  641. config PHYSICAL_ALIGN
  642. hex
  643. default "0x04000000" if FSL_BOOKE
  644. help
  645. This value puts the alignment restrictions on physical address
  646. where kernel is loaded and run from. Kernel is compiled for an
  647. address which meets above alignment restriction.
  648. config TASK_SIZE_BOOL
  649. bool "Set custom user task size"
  650. depends on ADVANCED_OPTIONS
  651. help
  652. This option allows you to set the amount of virtual address space
  653. allocated to user tasks. This can be useful in optimizing the
  654. virtual memory layout of the system.
  655. Say N here unless you know what you are doing.
  656. config TASK_SIZE
  657. hex "Size of user task space" if TASK_SIZE_BOOL
  658. default "0x80000000" if PPC_PREP || PPC_8xx
  659. default "0xc0000000"
  660. config CONSISTENT_START_BOOL
  661. bool "Set custom consistent memory pool address"
  662. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  663. help
  664. This option allows you to set the base virtual address
  665. of the consistent memory pool. This pool of virtual
  666. memory is used to make consistent memory allocations.
  667. config CONSISTENT_START
  668. hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
  669. default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
  670. default "0xff100000" if NOT_COHERENT_CACHE
  671. config CONSISTENT_SIZE_BOOL
  672. bool "Set custom consistent memory pool size"
  673. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  674. help
  675. This option allows you to set the size of the
  676. consistent memory pool. This pool of virtual memory
  677. is used to make consistent memory allocations.
  678. config CONSISTENT_SIZE
  679. hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
  680. default "0x00200000" if NOT_COHERENT_CACHE
  681. config PIN_TLB
  682. bool "Pinned Kernel TLBs (860 ONLY)"
  683. depends on ADVANCED_OPTIONS && 8xx
  684. endmenu
  685. if PPC64
  686. config RELOCATABLE
  687. bool "Build a relocatable kernel"
  688. help
  689. This builds a kernel image that is capable of running anywhere
  690. in the RMA (real memory area) at any 16k-aligned base address.
  691. The kernel is linked as a position-independent executable (PIE)
  692. and contains dynamic relocations which are processed early
  693. in the bootup process.
  694. One use is for the kexec on panic case where the recovery kernel
  695. must live at a different physical address than the primary
  696. kernel.
  697. config PAGE_OFFSET
  698. hex
  699. default "0xc000000000000000"
  700. config KERNEL_START
  701. hex
  702. default "0xc000000000000000"
  703. config PHYSICAL_START
  704. hex
  705. default "0x00000000"
  706. endif
  707. source "net/Kconfig"
  708. source "drivers/Kconfig"
  709. source "fs/Kconfig"
  710. source "arch/powerpc/sysdev/qe_lib/Kconfig"
  711. source "lib/Kconfig"
  712. source "arch/powerpc/Kconfig.debug"
  713. source "security/Kconfig"
  714. config KEYS_COMPAT
  715. bool
  716. depends on COMPAT && KEYS
  717. default y
  718. source "crypto/Kconfig"
  719. config PPC_CLOCK
  720. bool
  721. default n
  722. select HAVE_CLK
  723. config PPC_LIB_RHEAP
  724. bool
  725. source "arch/powerpc/kvm/Kconfig"