Kconfig 22 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902
  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 ARCH_WANT_OPTIONAL_GPIOLIB
  86. select HAVE_IDE
  87. select HAVE_IOREMAP_PROT
  88. select HAVE_EFFICIENT_UNALIGNED_ACCESS
  89. select HAVE_KPROBES
  90. select HAVE_ARCH_KGDB
  91. select HAVE_KRETPROBES
  92. select HAVE_ARCH_TRACEHOOK
  93. select HAVE_LMB
  94. select HAVE_DMA_ATTRS if PPC64
  95. select USE_GENERIC_SMP_HELPERS if SMP
  96. select HAVE_OPROFILE
  97. select HAVE_SYSCALL_WRAPPERS if PPC64
  98. config EARLY_PRINTK
  99. bool
  100. default y
  101. config COMPAT
  102. bool
  103. default y if PPC64
  104. select COMPAT_BINFMT_ELF
  105. config SYSVIPC_COMPAT
  106. bool
  107. depends on COMPAT && SYSVIPC
  108. default y
  109. # All PPC32s use generic nvram driver through ppc_md
  110. config GENERIC_NVRAM
  111. bool
  112. default y if PPC32
  113. config SCHED_OMIT_FRAME_POINTER
  114. bool
  115. default y
  116. config ARCH_MAY_HAVE_PC_FDC
  117. bool
  118. default !PPC_PSERIES || PCI
  119. config PPC_OF
  120. def_bool y
  121. config OF
  122. def_bool y
  123. config PPC_UDBG_16550
  124. bool
  125. default n
  126. config GENERIC_TBSYNC
  127. bool
  128. default y if PPC32 && SMP
  129. default n
  130. config AUDIT_ARCH
  131. bool
  132. default y
  133. config GENERIC_BUG
  134. bool
  135. default y
  136. depends on BUG
  137. config SYS_SUPPORTS_APM_EMULATION
  138. default y if PMAC_APM_EMU
  139. bool
  140. config DEFAULT_UIMAGE
  141. bool
  142. help
  143. Used to allow a board to specify it wants a uImage built by default
  144. default n
  145. config REDBOOT
  146. bool
  147. config HIBERNATE_32
  148. bool
  149. depends on (PPC_PMAC && !SMP) || BROKEN
  150. default y
  151. config HIBERNATE_64
  152. bool
  153. depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
  154. default y
  155. config ARCH_HIBERNATION_POSSIBLE
  156. bool
  157. depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
  158. default y
  159. config ARCH_SUSPEND_POSSIBLE
  160. def_bool y
  161. depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
  162. config PPC_DCR_NATIVE
  163. bool
  164. default n
  165. config PPC_DCR_MMIO
  166. bool
  167. default n
  168. config PPC_DCR
  169. bool
  170. depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
  171. default y
  172. config PPC_OF_PLATFORM_PCI
  173. bool
  174. depends on PCI
  175. depends on PPC64 # not supported on 32 bits yet
  176. default n
  177. source "init/Kconfig"
  178. source "kernel/Kconfig.freezer"
  179. source "arch/powerpc/sysdev/Kconfig"
  180. source "arch/powerpc/platforms/Kconfig"
  181. menu "Kernel options"
  182. config HIGHMEM
  183. bool "High memory support"
  184. depends on PPC32
  185. source kernel/time/Kconfig
  186. source kernel/Kconfig.hz
  187. source kernel/Kconfig.preempt
  188. source "fs/Kconfig.binfmt"
  189. config HUGETLB_PAGE_SIZE_VARIABLE
  190. bool
  191. depends on HUGETLB_PAGE
  192. default y
  193. config MATH_EMULATION
  194. bool "Math emulation"
  195. depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
  196. ---help---
  197. Some PowerPC chips designed for embedded applications do not have
  198. a floating-point unit and therefore do not implement the
  199. floating-point instructions in the PowerPC instruction set. If you
  200. say Y here, the kernel will include code to emulate a floating-point
  201. unit, which will allow programs that use floating-point
  202. instructions to run.
  203. config 8XX_MINIMAL_FPEMU
  204. bool "Minimal math emulation for 8xx"
  205. depends on 8xx && !MATH_EMULATION
  206. help
  207. Older arch/ppc kernels still emulated a few floating point
  208. instructions such as load and store, even when full math
  209. emulation is disabled. Say "Y" here if you want to preserve
  210. this behavior.
  211. It is recommended that you build a soft-float userspace instead.
  212. config IOMMU_VMERGE
  213. bool "Enable IOMMU virtual merging"
  214. depends on PPC64
  215. default y
  216. help
  217. Cause IO segments sent to a device for DMA to be merged virtually
  218. by the IOMMU when they happen to have been allocated contiguously.
  219. This doesn't add pressure to the IOMMU allocator. However, some
  220. drivers don't support getting large merged segments coming back
  221. from *_map_sg().
  222. Most drivers don't have this problem; it is safe to say Y here.
  223. config IOMMU_HELPER
  224. def_bool PPC64
  225. config PPC_NEED_DMA_SYNC_OPS
  226. def_bool y
  227. depends on NOT_COHERENT_CACHE
  228. config HOTPLUG_CPU
  229. bool "Support for enabling/disabling CPUs"
  230. depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
  231. ---help---
  232. Say Y here to be able to disable and re-enable individual
  233. CPUs at runtime on SMP machines.
  234. Say N if you are unsure.
  235. config ARCH_ENABLE_MEMORY_HOTPLUG
  236. def_bool y
  237. config ARCH_HAS_WALK_MEMORY
  238. def_bool y
  239. config ARCH_ENABLE_MEMORY_HOTREMOVE
  240. def_bool y
  241. config KEXEC
  242. bool "kexec system call (EXPERIMENTAL)"
  243. depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
  244. help
  245. kexec is a system call that implements the ability to shutdown your
  246. current kernel, and to start another kernel. It is like a reboot
  247. but it is independent of the system firmware. And like a reboot
  248. you can start any kernel with it, not just Linux.
  249. The name comes from the similarity to the exec system call.
  250. It is an ongoing process to be certain the hardware in a machine
  251. is properly shutdown, so do not be surprised if this code does not
  252. initially work for you. It may help to enable device hotplugging
  253. support. As of this writing the exact hardware interface is
  254. strongly in flux, so no good recommendation can be made.
  255. config CRASH_DUMP
  256. bool "Build a kdump crash kernel"
  257. depends on PPC64 || 6xx
  258. select RELOCATABLE if PPC64
  259. help
  260. Build a kernel suitable for use as a kdump capture kernel.
  261. The same kernel binary can be used as production kernel and dump
  262. capture kernel.
  263. config PHYP_DUMP
  264. bool "Hypervisor-assisted dump (EXPERIMENTAL)"
  265. depends on PPC_PSERIES && EXPERIMENTAL
  266. help
  267. Hypervisor-assisted dump is meant to be a kdump replacement
  268. offering robustness and speed not possible without system
  269. hypervisor assistence.
  270. If unsure, say "N"
  271. config PPCBUG_NVRAM
  272. bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
  273. default y if PPC_PREP
  274. config IRQ_ALL_CPUS
  275. bool "Distribute interrupts on all CPUs by default"
  276. depends on SMP && !MV64360
  277. help
  278. This option gives the kernel permission to distribute IRQs across
  279. multiple CPUs. Saying N here will route all IRQs to the first
  280. CPU. Generally saying Y is safe, although some problems have been
  281. reported with SMP Power Macintoshes with this option enabled.
  282. config NUMA
  283. bool "NUMA support"
  284. depends on PPC64
  285. default y if SMP && PPC_PSERIES
  286. config NODES_SHIFT
  287. int
  288. default "4"
  289. depends on NEED_MULTIPLE_NODES
  290. config ARCH_SELECT_MEMORY_MODEL
  291. def_bool y
  292. depends on PPC64
  293. config ARCH_FLATMEM_ENABLE
  294. def_bool y
  295. depends on (PPC64 && !NUMA) || PPC32
  296. config ARCH_SPARSEMEM_ENABLE
  297. def_bool y
  298. depends on PPC64
  299. select SPARSEMEM_VMEMMAP_ENABLE
  300. config ARCH_SPARSEMEM_DEFAULT
  301. def_bool y
  302. depends on (SMP && PPC_PSERIES) || PPC_PS3
  303. config ARCH_POPULATES_NODE_MAP
  304. def_bool y
  305. source "mm/Kconfig"
  306. config ARCH_MEMORY_PROBE
  307. def_bool y
  308. depends on MEMORY_HOTPLUG
  309. # Some NUMA nodes have memory ranges that span
  310. # other nodes. Even though a pfn is valid and
  311. # between a node's start and end pfns, it may not
  312. # reside on that node. See memmap_init_zone()
  313. # for details.
  314. config NODES_SPAN_OTHER_NODES
  315. def_bool y
  316. depends on NEED_MULTIPLE_NODES
  317. config PPC_HAS_HASH_64K
  318. bool
  319. depends on PPC64
  320. default n
  321. choice
  322. prompt "Page size"
  323. default PPC_4K_PAGES
  324. help
  325. Select the kernel logical page size. Increasing the page size
  326. will reduce software overhead at each page boundary, allow
  327. hardware prefetch mechanisms to be more effective, and allow
  328. larger dma transfers increasing IO efficiency and reducing
  329. overhead. However the utilization of memory will increase.
  330. For example, each cached file will using a multiple of the
  331. page size to hold its contents and the difference between the
  332. end of file and the end of page is wasted.
  333. Some dedicated systems, such as software raid serving with
  334. accelerated calculations, have shown significant increases.
  335. If you configure a 64 bit kernel for 64k pages but the
  336. processor does not support them, then the kernel will simulate
  337. them with 4k pages, loading them on demand, but with the
  338. reduced software overhead and larger internal fragmentation.
  339. For the 32 bit kernel, a large page option will not be offered
  340. unless it is supported by the configured processor.
  341. If unsure, choose 4K_PAGES.
  342. config PPC_4K_PAGES
  343. bool "4k page size"
  344. config PPC_16K_PAGES
  345. bool "16k page size" if 44x
  346. config PPC_64K_PAGES
  347. bool "64k page size" if 44x || PPC_STD_MMU_64
  348. select PPC_HAS_HASH_64K if PPC_STD_MMU_64
  349. endchoice
  350. config FORCE_MAX_ZONEORDER
  351. int "Maximum zone order"
  352. range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
  353. default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
  354. range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
  355. default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
  356. range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
  357. default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
  358. range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
  359. default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
  360. range 11 64
  361. default "11"
  362. help
  363. The kernel memory allocator divides physically contiguous memory
  364. blocks into "zones", where each zone is a power of two number of
  365. pages. This option selects the largest power of two that the kernel
  366. keeps in the memory allocator. If you need to allocate very large
  367. blocks of physically contiguous memory, then you may need to
  368. increase this value.
  369. This config option is actually maximum order plus one. For example,
  370. a value of 11 means that the largest free memory block is 2^10 pages.
  371. The page size is not necessarily 4KB. For example, on 64-bit
  372. systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
  373. this in mind when choosing a value for this option.
  374. config PPC_SUBPAGE_PROT
  375. bool "Support setting protections for 4k subpages"
  376. depends on PPC_STD_MMU_64 && PPC_64K_PAGES
  377. help
  378. This option adds support for a system call to allow user programs
  379. to set access permissions (read/write, readonly, or no access)
  380. on the 4k subpages of each 64k page.
  381. config SCHED_SMT
  382. bool "SMT (Hyperthreading) scheduler support"
  383. depends on PPC64 && SMP
  384. help
  385. SMT scheduler support improves the CPU scheduler's decision making
  386. when dealing with POWER5 cpus at a cost of slightly increased
  387. overhead in some places. If unsure say N here.
  388. config PROC_DEVICETREE
  389. bool "Support for device tree in /proc"
  390. depends on PROC_FS
  391. help
  392. This option adds a device-tree directory under /proc which contains
  393. an image of the device tree that the kernel copies from Open
  394. Firmware or other boot firmware. If unsure, say Y here.
  395. config CMDLINE_BOOL
  396. bool "Default bootloader kernel arguments"
  397. config CMDLINE
  398. string "Initial kernel command string"
  399. depends on CMDLINE_BOOL
  400. default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
  401. help
  402. On some platforms, there is currently no way for the boot loader to
  403. pass arguments to the kernel. For these platforms, you can supply
  404. some command-line options at build time by entering them here. In
  405. most cases you will need to specify the root device here.
  406. config EXTRA_TARGETS
  407. string "Additional default image types"
  408. help
  409. List additional targets to be built by the bootwrapper here (separated
  410. by spaces). This is useful for targets that depend of device tree
  411. files in the .dts directory.
  412. Targets in this list will be build as part of the default build
  413. target, or when the user does a 'make zImage' or a
  414. 'make zImage.initrd'.
  415. If unsure, leave blank
  416. if !44x || BROKEN
  417. config ARCH_WANTS_FREEZER_CONTROL
  418. def_bool y
  419. depends on ADB_PMU
  420. source kernel/power/Kconfig
  421. endif
  422. config SECCOMP
  423. bool "Enable seccomp to safely compute untrusted bytecode"
  424. depends on PROC_FS
  425. default y
  426. help
  427. This kernel feature is useful for number crunching applications
  428. that may need to compute untrusted bytecode during their
  429. execution. By using pipes or other transports made available to
  430. the process as file descriptors supporting the read/write
  431. syscalls, it's possible to isolate those applications in
  432. their own address space using seccomp. Once seccomp is
  433. enabled via /proc/<pid>/seccomp, it cannot be disabled
  434. and the task is only allowed to execute a few safe syscalls
  435. defined by each seccomp mode.
  436. If unsure, say Y. Only embedded should say N here.
  437. endmenu
  438. config ISA_DMA_API
  439. bool
  440. default !PPC_ISERIES || PCI
  441. menu "Bus options"
  442. config ISA
  443. bool "Support for ISA-bus hardware"
  444. depends on PPC_PREP || PPC_CHRP
  445. select PPC_I8259
  446. help
  447. Find out whether you have ISA slots on your motherboard. ISA is the
  448. name of a bus system, i.e. the way the CPU talks to the other stuff
  449. inside your box. If you have an Apple machine, say N here; if you
  450. have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
  451. you have an embedded board, consult your board documentation.
  452. config ZONE_DMA
  453. bool
  454. default y
  455. config GENERIC_ISA_DMA
  456. bool
  457. depends on PPC64 || POWER4 || 6xx && !CPM2
  458. default y
  459. config PPC_INDIRECT_PCI
  460. bool
  461. depends on PCI
  462. default y if 40x || 44x
  463. default n
  464. config EISA
  465. bool
  466. config SBUS
  467. bool
  468. config FSL_SOC
  469. bool
  470. config FSL_PCI
  471. bool
  472. select PPC_INDIRECT_PCI
  473. config 4xx_SOC
  474. bool
  475. config FSL_LBC
  476. bool
  477. help
  478. Freescale Localbus support
  479. config FSL_GTM
  480. bool
  481. depends on PPC_83xx || QUICC_ENGINE || CPM2
  482. help
  483. Freescale General-purpose Timers support
  484. # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
  485. config MCA
  486. bool
  487. # Platforms that what PCI turned unconditionally just do select PCI
  488. # in their config node. Platforms that want to choose at config
  489. # time should select PPC_PCI_CHOICE
  490. config PPC_PCI_CHOICE
  491. bool
  492. config PCI
  493. bool "PCI support" if PPC_PCI_CHOICE
  494. default y if !40x && !CPM2 && !8xx && !PPC_83xx \
  495. && !PPC_85xx && !PPC_86xx
  496. default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
  497. default PCI_QSPAN if !4xx && !CPM2 && 8xx
  498. select ARCH_SUPPORTS_MSI
  499. help
  500. Find out whether your system includes a PCI bus. PCI is the name of
  501. a bus system, i.e. the way the CPU talks to the other stuff inside
  502. your box. If you say Y here, the kernel will include drivers and
  503. infrastructure code to support PCI bus devices.
  504. config PCI_DOMAINS
  505. def_bool PCI
  506. config PCI_SYSCALL
  507. def_bool PCI
  508. config PCI_QSPAN
  509. bool "QSpan PCI"
  510. depends on !4xx && !CPM2 && 8xx
  511. select PPC_I8259
  512. help
  513. Say Y here if you have a system based on a Motorola 8xx-series
  514. embedded processor with a QSPAN PCI interface, otherwise say N.
  515. config PCI_8260
  516. bool
  517. depends on PCI && 8260
  518. select PPC_INDIRECT_PCI
  519. default y
  520. config 8260_PCI9
  521. bool "Enable workaround for MPC826x erratum PCI 9"
  522. depends on PCI_8260 && !8272
  523. default y
  524. choice
  525. prompt "IDMA channel for PCI 9 workaround"
  526. depends on 8260_PCI9
  527. config 8260_PCI9_IDMA1
  528. bool "IDMA1"
  529. config 8260_PCI9_IDMA2
  530. bool "IDMA2"
  531. config 8260_PCI9_IDMA3
  532. bool "IDMA3"
  533. config 8260_PCI9_IDMA4
  534. bool "IDMA4"
  535. endchoice
  536. source "drivers/pci/pcie/Kconfig"
  537. source "drivers/pci/Kconfig"
  538. source "drivers/pcmcia/Kconfig"
  539. source "drivers/pci/hotplug/Kconfig"
  540. config HAS_RAPIDIO
  541. bool
  542. default n
  543. config RAPIDIO
  544. bool "RapidIO support"
  545. depends on HAS_RAPIDIO
  546. help
  547. If you say Y here, the kernel will include drivers and
  548. infrastructure code to support RapidIO interconnect devices.
  549. source "drivers/rapidio/Kconfig"
  550. endmenu
  551. menu "Advanced setup"
  552. depends on PPC32
  553. config ADVANCED_OPTIONS
  554. bool "Prompt for advanced kernel configuration options"
  555. help
  556. This option will enable prompting for a variety of advanced kernel
  557. configuration options. These options can cause the kernel to not
  558. work if they are set incorrectly, but can be used to optimize certain
  559. aspects of kernel memory management.
  560. Unless you know what you are doing, say N here.
  561. comment "Default settings for advanced configuration options are used"
  562. depends on !ADVANCED_OPTIONS
  563. config LOWMEM_SIZE_BOOL
  564. bool "Set maximum low memory"
  565. depends on ADVANCED_OPTIONS
  566. help
  567. This option allows you to set the maximum amount of memory which
  568. will be used as "low memory", that is, memory which the kernel can
  569. access directly, without having to set up a kernel virtual mapping.
  570. This can be useful in optimizing the layout of kernel virtual
  571. memory.
  572. Say N here unless you know what you are doing.
  573. config LOWMEM_SIZE
  574. hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
  575. default "0x30000000"
  576. config RELOCATABLE
  577. bool "Build a relocatable kernel (EXPERIMENTAL)"
  578. depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  579. help
  580. This builds a kernel image that is capable of running at the
  581. location the kernel is loaded at (some alignment restrictions may
  582. exist).
  583. One use is for the kexec on panic case where the recovery kernel
  584. must live at a different physical address than the primary
  585. kernel.
  586. Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
  587. it has been loaded at and the compile time physical addresses
  588. CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
  589. setting can still be useful to bootwrappers that need to know the
  590. load location of the kernel (eg. u-boot/mkimage).
  591. config PAGE_OFFSET_BOOL
  592. bool "Set custom page offset address"
  593. depends on ADVANCED_OPTIONS
  594. help
  595. This option allows you to set the kernel virtual address at which
  596. the kernel will map low memory. This can be useful in optimizing
  597. the virtual memory layout of the system.
  598. Say N here unless you know what you are doing.
  599. config PAGE_OFFSET
  600. hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
  601. default "0xc0000000"
  602. config KERNEL_START_BOOL
  603. bool "Set custom kernel base address"
  604. depends on ADVANCED_OPTIONS
  605. help
  606. This option allows you to set the kernel virtual address at which
  607. the kernel will be loaded. Normally this should match PAGE_OFFSET
  608. however there are times (like kdump) that one might not want them
  609. to be the same.
  610. Say N here unless you know what you are doing.
  611. config KERNEL_START
  612. hex "Virtual address of kernel base" if KERNEL_START_BOOL
  613. default PAGE_OFFSET if PAGE_OFFSET_BOOL
  614. default "0xc2000000" if CRASH_DUMP
  615. default "0xc0000000"
  616. config PHYSICAL_START_BOOL
  617. bool "Set physical address where the kernel is loaded"
  618. depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  619. help
  620. This gives the physical address where the kernel is loaded.
  621. Say N here unless you know what you are doing.
  622. config PHYSICAL_START
  623. hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
  624. default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
  625. default "0x00000000"
  626. config PHYSICAL_ALIGN
  627. hex
  628. default "0x10000000" if FSL_BOOKE
  629. help
  630. This value puts the alignment restrictions on physical address
  631. where kernel is loaded and run from. Kernel is compiled for an
  632. address which meets above alignment restriction.
  633. config TASK_SIZE_BOOL
  634. bool "Set custom user task size"
  635. depends on ADVANCED_OPTIONS
  636. help
  637. This option allows you to set the amount of virtual address space
  638. allocated to user tasks. This can be useful in optimizing the
  639. virtual memory layout of the system.
  640. Say N here unless you know what you are doing.
  641. config TASK_SIZE
  642. hex "Size of user task space" if TASK_SIZE_BOOL
  643. default "0x80000000" if PPC_PREP || PPC_8xx
  644. default "0xc0000000"
  645. config CONSISTENT_START_BOOL
  646. bool "Set custom consistent memory pool address"
  647. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  648. help
  649. This option allows you to set the base virtual address
  650. of the consistent memory pool. This pool of virtual
  651. memory is used to make consistent memory allocations.
  652. config CONSISTENT_START
  653. hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
  654. default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
  655. default "0xff100000" if NOT_COHERENT_CACHE
  656. config CONSISTENT_SIZE_BOOL
  657. bool "Set custom consistent memory pool size"
  658. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  659. help
  660. This option allows you to set the size of the
  661. consistent memory pool. This pool of virtual memory
  662. is used to make consistent memory allocations.
  663. config CONSISTENT_SIZE
  664. hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
  665. default "0x00200000" if NOT_COHERENT_CACHE
  666. config PIN_TLB
  667. bool "Pinned Kernel TLBs (860 ONLY)"
  668. depends on ADVANCED_OPTIONS && 8xx
  669. endmenu
  670. if PPC64
  671. config RELOCATABLE
  672. bool "Build a relocatable kernel"
  673. help
  674. This builds a kernel image that is capable of running anywhere
  675. in the RMA (real memory area) at any 16k-aligned base address.
  676. The kernel is linked as a position-independent executable (PIE)
  677. and contains dynamic relocations which are processed early
  678. in the bootup process.
  679. One use is for the kexec on panic case where the recovery kernel
  680. must live at a different physical address than the primary
  681. kernel.
  682. config PAGE_OFFSET
  683. hex
  684. default "0xc000000000000000"
  685. config KERNEL_START
  686. hex
  687. default "0xc000000000000000"
  688. config PHYSICAL_START
  689. hex
  690. default "0x00000000"
  691. endif
  692. source "net/Kconfig"
  693. source "drivers/Kconfig"
  694. source "fs/Kconfig"
  695. source "arch/powerpc/sysdev/qe_lib/Kconfig"
  696. source "lib/Kconfig"
  697. source "arch/powerpc/Kconfig.debug"
  698. source "security/Kconfig"
  699. config KEYS_COMPAT
  700. bool
  701. depends on COMPAT && KEYS
  702. default y
  703. source "crypto/Kconfig"
  704. config PPC_CLOCK
  705. bool
  706. default n
  707. select HAVE_CLK
  708. config PPC_LIB_RHEAP
  709. bool
  710. source "arch/powerpc/kvm/Kconfig"