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
  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. config STDBINUTILS
  323. bool "Using standard binutils settings"
  324. depends on 44x
  325. default y
  326. help
  327. Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
  328. Note, that kernel will be able to run only those applications,
  329. which had been compiled using binutils later than 2.17.50.0.3 with
  330. '-zmax-page-size' set to 256K (the default is 64K). Or, if using
  331. the older binutils, you can patch them with a trivial patch, which
  332. changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
  333. choice
  334. prompt "Page size"
  335. default PPC_4K_PAGES
  336. help
  337. Select the kernel logical page size. Increasing the page size
  338. will reduce software overhead at each page boundary, allow
  339. hardware prefetch mechanisms to be more effective, and allow
  340. larger dma transfers increasing IO efficiency and reducing
  341. overhead. However the utilization of memory will increase.
  342. For example, each cached file will using a multiple of the
  343. page size to hold its contents and the difference between the
  344. end of file and the end of page is wasted.
  345. Some dedicated systems, such as software raid serving with
  346. accelerated calculations, have shown significant increases.
  347. If you configure a 64 bit kernel for 64k pages but the
  348. processor does not support them, then the kernel will simulate
  349. them with 4k pages, loading them on demand, but with the
  350. reduced software overhead and larger internal fragmentation.
  351. For the 32 bit kernel, a large page option will not be offered
  352. unless it is supported by the configured processor.
  353. If unsure, choose 4K_PAGES.
  354. config PPC_4K_PAGES
  355. bool "4k page size"
  356. config PPC_16K_PAGES
  357. bool "16k page size" if 44x
  358. config PPC_64K_PAGES
  359. bool "64k page size" if 44x || PPC_STD_MMU_64
  360. select PPC_HAS_HASH_64K if PPC_STD_MMU_64
  361. config PPC_256K_PAGES
  362. bool "256k page size" if 44x
  363. depends on !STDBINUTILS && (!SHMEM || BROKEN)
  364. help
  365. Make the page size 256k.
  366. As the ELF standard only requires alignment to support page
  367. sizes up to 64k, you will need to compile all of your user
  368. space applications with a non-standard binutils settings
  369. (see the STDBINUTILS description for details).
  370. Say N unless you know what you are doing.
  371. endchoice
  372. config FORCE_MAX_ZONEORDER
  373. int "Maximum zone order"
  374. range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
  375. default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
  376. range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
  377. default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
  378. range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
  379. default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
  380. range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
  381. default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
  382. range 5 64 if PPC_STD_MMU_32 && PPC_256K_PAGES
  383. default "5" if PPC_STD_MMU_32 && PPC_256K_PAGES
  384. range 11 64
  385. default "11"
  386. help
  387. The kernel memory allocator divides physically contiguous memory
  388. blocks into "zones", where each zone is a power of two number of
  389. pages. This option selects the largest power of two that the kernel
  390. keeps in the memory allocator. If you need to allocate very large
  391. blocks of physically contiguous memory, then you may need to
  392. increase this value.
  393. This config option is actually maximum order plus one. For example,
  394. a value of 11 means that the largest free memory block is 2^10 pages.
  395. The page size is not necessarily 4KB. For example, on 64-bit
  396. systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
  397. this in mind when choosing a value for this option.
  398. config PPC_SUBPAGE_PROT
  399. bool "Support setting protections for 4k subpages"
  400. depends on PPC_STD_MMU_64 && PPC_64K_PAGES
  401. help
  402. This option adds support for a system call to allow user programs
  403. to set access permissions (read/write, readonly, or no access)
  404. on the 4k subpages of each 64k page.
  405. config SCHED_SMT
  406. bool "SMT (Hyperthreading) scheduler support"
  407. depends on PPC64 && SMP
  408. help
  409. SMT scheduler support improves the CPU scheduler's decision making
  410. when dealing with POWER5 cpus at a cost of slightly increased
  411. overhead in some places. If unsure say N here.
  412. config PROC_DEVICETREE
  413. bool "Support for device tree in /proc"
  414. depends on PROC_FS
  415. help
  416. This option adds a device-tree directory under /proc which contains
  417. an image of the device tree that the kernel copies from Open
  418. Firmware or other boot firmware. If unsure, say Y here.
  419. config CMDLINE_BOOL
  420. bool "Default bootloader kernel arguments"
  421. config CMDLINE
  422. string "Initial kernel command string"
  423. depends on CMDLINE_BOOL
  424. default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
  425. help
  426. On some platforms, there is currently no way for the boot loader to
  427. pass arguments to the kernel. For these platforms, you can supply
  428. some command-line options at build time by entering them here. In
  429. most cases you will need to specify the root device here.
  430. config EXTRA_TARGETS
  431. string "Additional default image types"
  432. help
  433. List additional targets to be built by the bootwrapper here (separated
  434. by spaces). This is useful for targets that depend of device tree
  435. files in the .dts directory.
  436. Targets in this list will be build as part of the default build
  437. target, or when the user does a 'make zImage' or a
  438. 'make zImage.initrd'.
  439. If unsure, leave blank
  440. if !44x || BROKEN
  441. config ARCH_WANTS_FREEZER_CONTROL
  442. def_bool y
  443. depends on ADB_PMU
  444. source kernel/power/Kconfig
  445. endif
  446. config SECCOMP
  447. bool "Enable seccomp to safely compute untrusted bytecode"
  448. depends on PROC_FS
  449. default y
  450. help
  451. This kernel feature is useful for number crunching applications
  452. that may need to compute untrusted bytecode during their
  453. execution. By using pipes or other transports made available to
  454. the process as file descriptors supporting the read/write
  455. syscalls, it's possible to isolate those applications in
  456. their own address space using seccomp. Once seccomp is
  457. enabled via /proc/<pid>/seccomp, it cannot be disabled
  458. and the task is only allowed to execute a few safe syscalls
  459. defined by each seccomp mode.
  460. If unsure, say Y. Only embedded should say N here.
  461. endmenu
  462. config ISA_DMA_API
  463. bool
  464. default !PPC_ISERIES || PCI
  465. menu "Bus options"
  466. config ISA
  467. bool "Support for ISA-bus hardware"
  468. depends on PPC_PREP || PPC_CHRP
  469. select PPC_I8259
  470. help
  471. Find out whether you have ISA slots on your motherboard. ISA is the
  472. name of a bus system, i.e. the way the CPU talks to the other stuff
  473. inside your box. If you have an Apple machine, say N here; if you
  474. have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
  475. you have an embedded board, consult your board documentation.
  476. config ZONE_DMA
  477. bool
  478. default y
  479. config GENERIC_ISA_DMA
  480. bool
  481. depends on PPC64 || POWER4 || 6xx && !CPM2
  482. default y
  483. config PPC_INDIRECT_PCI
  484. bool
  485. depends on PCI
  486. default y if 40x || 44x
  487. default n
  488. config EISA
  489. bool
  490. config SBUS
  491. bool
  492. config FSL_SOC
  493. bool
  494. config FSL_PCI
  495. bool
  496. select PPC_INDIRECT_PCI
  497. select PCI_QUIRKS
  498. config 4xx_SOC
  499. bool
  500. config FSL_LBC
  501. bool
  502. help
  503. Freescale Localbus support
  504. config FSL_GTM
  505. bool
  506. depends on PPC_83xx || QUICC_ENGINE || CPM2
  507. help
  508. Freescale General-purpose Timers support
  509. # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
  510. config MCA
  511. bool
  512. # Platforms that what PCI turned unconditionally just do select PCI
  513. # in their config node. Platforms that want to choose at config
  514. # time should select PPC_PCI_CHOICE
  515. config PPC_PCI_CHOICE
  516. bool
  517. config PCI
  518. bool "PCI support" if PPC_PCI_CHOICE
  519. default y if !40x && !CPM2 && !8xx && !PPC_83xx \
  520. && !PPC_85xx && !PPC_86xx
  521. default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
  522. default PCI_QSPAN if !4xx && !CPM2 && 8xx
  523. select ARCH_SUPPORTS_MSI
  524. help
  525. Find out whether your system includes a PCI bus. PCI is the name of
  526. a bus system, i.e. the way the CPU talks to the other stuff inside
  527. your box. If you say Y here, the kernel will include drivers and
  528. infrastructure code to support PCI bus devices.
  529. config PCI_DOMAINS
  530. def_bool PCI
  531. config PCI_SYSCALL
  532. def_bool PCI
  533. config PCI_QSPAN
  534. bool "QSpan PCI"
  535. depends on !4xx && !CPM2 && 8xx
  536. select PPC_I8259
  537. help
  538. Say Y here if you have a system based on a Motorola 8xx-series
  539. embedded processor with a QSPAN PCI interface, otherwise say N.
  540. config PCI_8260
  541. bool
  542. depends on PCI && 8260
  543. select PPC_INDIRECT_PCI
  544. default y
  545. config 8260_PCI9
  546. bool "Enable workaround for MPC826x erratum PCI 9"
  547. depends on PCI_8260 && !8272
  548. default y
  549. choice
  550. prompt "IDMA channel for PCI 9 workaround"
  551. depends on 8260_PCI9
  552. config 8260_PCI9_IDMA1
  553. bool "IDMA1"
  554. config 8260_PCI9_IDMA2
  555. bool "IDMA2"
  556. config 8260_PCI9_IDMA3
  557. bool "IDMA3"
  558. config 8260_PCI9_IDMA4
  559. bool "IDMA4"
  560. endchoice
  561. source "drivers/pci/pcie/Kconfig"
  562. source "drivers/pci/Kconfig"
  563. source "drivers/pcmcia/Kconfig"
  564. source "drivers/pci/hotplug/Kconfig"
  565. config HAS_RAPIDIO
  566. bool
  567. default n
  568. config RAPIDIO
  569. bool "RapidIO support"
  570. depends on HAS_RAPIDIO
  571. help
  572. If you say Y here, the kernel will include drivers and
  573. infrastructure code to support RapidIO interconnect devices.
  574. source "drivers/rapidio/Kconfig"
  575. endmenu
  576. menu "Advanced setup"
  577. depends on PPC32
  578. config ADVANCED_OPTIONS
  579. bool "Prompt for advanced kernel configuration options"
  580. help
  581. This option will enable prompting for a variety of advanced kernel
  582. configuration options. These options can cause the kernel to not
  583. work if they are set incorrectly, but can be used to optimize certain
  584. aspects of kernel memory management.
  585. Unless you know what you are doing, say N here.
  586. comment "Default settings for advanced configuration options are used"
  587. depends on !ADVANCED_OPTIONS
  588. config LOWMEM_SIZE_BOOL
  589. bool "Set maximum low memory"
  590. depends on ADVANCED_OPTIONS
  591. help
  592. This option allows you to set the maximum amount of memory which
  593. will be used as "low memory", that is, memory which the kernel can
  594. access directly, without having to set up a kernel virtual mapping.
  595. This can be useful in optimizing the layout of kernel virtual
  596. memory.
  597. Say N here unless you know what you are doing.
  598. config LOWMEM_SIZE
  599. hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
  600. default "0x30000000"
  601. config LOWMEM_CAM_NUM_BOOL
  602. bool "Set number of CAMs to use to map low memory"
  603. depends on ADVANCED_OPTIONS && FSL_BOOKE
  604. help
  605. This option allows you to set the maximum number of CAM slots that
  606. will be used to map low memory. There are a limited number of slots
  607. available and even more limited number that will fit in the L1 MMU.
  608. However, using more entries will allow mapping more low memory. This
  609. can be useful in optimizing the layout of kernel virtual memory.
  610. Say N here unless you know what you are doing.
  611. config LOWMEM_CAM_NUM
  612. int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
  613. default 3
  614. config RELOCATABLE
  615. bool "Build a relocatable kernel (EXPERIMENTAL)"
  616. depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  617. help
  618. This builds a kernel image that is capable of running at the
  619. location the kernel is loaded at (some alignment restrictions may
  620. exist).
  621. One use is for the kexec on panic case where the recovery kernel
  622. must live at a different physical address than the primary
  623. kernel.
  624. Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
  625. it has been loaded at and the compile time physical addresses
  626. CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
  627. setting can still be useful to bootwrappers that need to know the
  628. load location of the kernel (eg. u-boot/mkimage).
  629. config PAGE_OFFSET_BOOL
  630. bool "Set custom page offset address"
  631. depends on ADVANCED_OPTIONS
  632. help
  633. This option allows you to set the kernel virtual address at which
  634. the kernel will map low memory. This can be useful in optimizing
  635. the virtual memory layout of the system.
  636. Say N here unless you know what you are doing.
  637. config PAGE_OFFSET
  638. hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
  639. default "0xc0000000"
  640. config KERNEL_START_BOOL
  641. bool "Set custom kernel base address"
  642. depends on ADVANCED_OPTIONS
  643. help
  644. This option allows you to set the kernel virtual address at which
  645. the kernel will be loaded. Normally this should match PAGE_OFFSET
  646. however there are times (like kdump) that one might not want them
  647. to be the same.
  648. Say N here unless you know what you are doing.
  649. config KERNEL_START
  650. hex "Virtual address of kernel base" if KERNEL_START_BOOL
  651. default PAGE_OFFSET if PAGE_OFFSET_BOOL
  652. default "0xc2000000" if CRASH_DUMP
  653. default "0xc0000000"
  654. config PHYSICAL_START_BOOL
  655. bool "Set physical address where the kernel is loaded"
  656. depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  657. help
  658. This gives the physical address where the kernel is loaded.
  659. Say N here unless you know what you are doing.
  660. config PHYSICAL_START
  661. hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
  662. default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
  663. default "0x00000000"
  664. config PHYSICAL_ALIGN
  665. hex
  666. default "0x04000000" if FSL_BOOKE
  667. help
  668. This value puts the alignment restrictions on physical address
  669. where kernel is loaded and run from. Kernel is compiled for an
  670. address which meets above alignment restriction.
  671. config TASK_SIZE_BOOL
  672. bool "Set custom user task size"
  673. depends on ADVANCED_OPTIONS
  674. help
  675. This option allows you to set the amount of virtual address space
  676. allocated to user tasks. This can be useful in optimizing the
  677. virtual memory layout of the system.
  678. Say N here unless you know what you are doing.
  679. config TASK_SIZE
  680. hex "Size of user task space" if TASK_SIZE_BOOL
  681. default "0x80000000" if PPC_PREP || PPC_8xx
  682. default "0xc0000000"
  683. config PIN_TLB
  684. bool "Pinned Kernel TLBs (860 ONLY)"
  685. depends on ADVANCED_OPTIONS && 8xx
  686. endmenu
  687. if PPC64
  688. config RELOCATABLE
  689. bool "Build a relocatable kernel"
  690. help
  691. This builds a kernel image that is capable of running anywhere
  692. in the RMA (real memory area) at any 16k-aligned base address.
  693. The kernel is linked as a position-independent executable (PIE)
  694. and contains dynamic relocations which are processed early
  695. in the bootup process.
  696. One use is for the kexec on panic case where the recovery kernel
  697. must live at a different physical address than the primary
  698. kernel.
  699. config PAGE_OFFSET
  700. hex
  701. default "0xc000000000000000"
  702. config KERNEL_START
  703. hex
  704. default "0xc000000000000000"
  705. config PHYSICAL_START
  706. hex
  707. default "0x00000000"
  708. endif
  709. source "net/Kconfig"
  710. source "drivers/Kconfig"
  711. source "fs/Kconfig"
  712. source "arch/powerpc/sysdev/qe_lib/Kconfig"
  713. source "lib/Kconfig"
  714. source "arch/powerpc/Kconfig.debug"
  715. source "security/Kconfig"
  716. config KEYS_COMPAT
  717. bool
  718. depends on COMPAT && KEYS
  719. default y
  720. source "crypto/Kconfig"
  721. config PPC_CLOCK
  722. bool
  723. default n
  724. select HAVE_CLK
  725. config PPC_LIB_RHEAP
  726. bool
  727. source "arch/powerpc/kvm/Kconfig"