Kconfig 24 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 GENERIC_HARDIRQS_NO__DO_IRQ
  33. bool
  34. default y
  35. config HAVE_SETUP_PER_CPU_AREA
  36. def_bool PPC64
  37. config NEED_PER_CPU_EMBED_FIRST_CHUNK
  38. def_bool PPC64
  39. config IRQ_PER_CPU
  40. bool
  41. default y
  42. config STACKTRACE_SUPPORT
  43. bool
  44. default y
  45. config HAVE_LATENCYTOP_SUPPORT
  46. def_bool y
  47. config TRACE_IRQFLAGS_SUPPORT
  48. bool
  49. default y
  50. config LOCKDEP_SUPPORT
  51. bool
  52. default y
  53. config RWSEM_GENERIC_SPINLOCK
  54. bool
  55. config RWSEM_XCHGADD_ALGORITHM
  56. bool
  57. default y
  58. config GENERIC_LOCKBREAK
  59. bool
  60. default y
  61. depends on SMP && PREEMPT
  62. config ARCH_HAS_ILOG2_U32
  63. bool
  64. default y
  65. config ARCH_HAS_ILOG2_U64
  66. bool
  67. default y if 64BIT
  68. config GENERIC_HWEIGHT
  69. bool
  70. default y
  71. config GENERIC_FIND_NEXT_BIT
  72. bool
  73. default y
  74. config GENERIC_GPIO
  75. bool
  76. help
  77. Generic GPIO API support
  78. config ARCH_NO_VIRT_TO_BUS
  79. def_bool PPC64
  80. config PPC
  81. bool
  82. default y
  83. select HAVE_FTRACE_MCOUNT_RECORD
  84. select HAVE_DYNAMIC_FTRACE
  85. select HAVE_FUNCTION_TRACER
  86. select HAVE_FUNCTION_GRAPH_TRACER
  87. select ARCH_WANT_OPTIONAL_GPIOLIB
  88. select HAVE_IDE
  89. select HAVE_IOREMAP_PROT
  90. select HAVE_EFFICIENT_UNALIGNED_ACCESS
  91. select HAVE_KPROBES
  92. select HAVE_ARCH_KGDB
  93. select HAVE_KRETPROBES
  94. select HAVE_ARCH_TRACEHOOK
  95. select HAVE_LMB
  96. select HAVE_DMA_ATTRS
  97. select HAVE_DMA_API_DEBUG
  98. select USE_GENERIC_SMP_HELPERS if SMP
  99. select HAVE_OPROFILE
  100. select HAVE_SYSCALL_WRAPPERS if PPC64
  101. select GENERIC_ATOMIC64 if PPC32
  102. select HAVE_PERF_EVENTS
  103. config EARLY_PRINTK
  104. bool
  105. default y
  106. config COMPAT
  107. bool
  108. default y if PPC64
  109. select COMPAT_BINFMT_ELF
  110. config SYSVIPC_COMPAT
  111. bool
  112. depends on COMPAT && SYSVIPC
  113. default y
  114. # All PPC32s use generic nvram driver through ppc_md
  115. config GENERIC_NVRAM
  116. bool
  117. default y if PPC32
  118. config SCHED_OMIT_FRAME_POINTER
  119. bool
  120. default y
  121. config ARCH_MAY_HAVE_PC_FDC
  122. bool
  123. default !PPC_PSERIES || PCI
  124. config PPC_OF
  125. def_bool y
  126. config OF
  127. def_bool y
  128. config PPC_UDBG_16550
  129. bool
  130. default n
  131. config GENERIC_TBSYNC
  132. bool
  133. default y if PPC32 && SMP
  134. default n
  135. config AUDIT_ARCH
  136. bool
  137. default y
  138. config GENERIC_BUG
  139. bool
  140. default y
  141. depends on BUG
  142. config SYS_SUPPORTS_APM_EMULATION
  143. default y if PMAC_APM_EMU
  144. bool
  145. config DTC
  146. bool
  147. default y
  148. config DEFAULT_UIMAGE
  149. bool
  150. help
  151. Used to allow a board to specify it wants a uImage built by default
  152. default n
  153. config REDBOOT
  154. bool
  155. config HIBERNATE_32
  156. bool
  157. depends on (PPC_PMAC && !SMP) || BROKEN
  158. default y
  159. config HIBERNATE_64
  160. bool
  161. depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
  162. default y
  163. config ARCH_HIBERNATION_POSSIBLE
  164. bool
  165. depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
  166. default y
  167. config ARCH_SUSPEND_POSSIBLE
  168. def_bool y
  169. depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
  170. config PPC_DCR_NATIVE
  171. bool
  172. default n
  173. config PPC_DCR_MMIO
  174. bool
  175. default n
  176. config PPC_DCR
  177. bool
  178. depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
  179. default y
  180. config PPC_OF_PLATFORM_PCI
  181. bool
  182. depends on PCI
  183. depends on PPC64 # not supported on 32 bits yet
  184. default n
  185. config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  186. def_bool y
  187. source "init/Kconfig"
  188. source "kernel/Kconfig.freezer"
  189. source "arch/powerpc/sysdev/Kconfig"
  190. source "arch/powerpc/platforms/Kconfig"
  191. menu "Kernel options"
  192. config HIGHMEM
  193. bool "High memory support"
  194. depends on PPC32
  195. source kernel/time/Kconfig
  196. source kernel/Kconfig.hz
  197. source kernel/Kconfig.preempt
  198. source "fs/Kconfig.binfmt"
  199. config HUGETLB_PAGE_SIZE_VARIABLE
  200. bool
  201. depends on HUGETLB_PAGE
  202. default y
  203. config MATH_EMULATION
  204. bool "Math emulation"
  205. depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
  206. ---help---
  207. Some PowerPC chips designed for embedded applications do not have
  208. a floating-point unit and therefore do not implement the
  209. floating-point instructions in the PowerPC instruction set. If you
  210. say Y here, the kernel will include code to emulate a floating-point
  211. unit, which will allow programs that use floating-point
  212. instructions to run.
  213. config 8XX_MINIMAL_FPEMU
  214. bool "Minimal math emulation for 8xx"
  215. depends on 8xx && !MATH_EMULATION
  216. help
  217. Older arch/ppc kernels still emulated a few floating point
  218. instructions such as load and store, even when full math
  219. emulation is disabled. Say "Y" here if you want to preserve
  220. this behavior.
  221. It is recommended that you build a soft-float userspace instead.
  222. config IOMMU_VMERGE
  223. bool "Enable IOMMU virtual merging"
  224. depends on PPC64
  225. default y
  226. help
  227. Cause IO segments sent to a device for DMA to be merged virtually
  228. by the IOMMU when they happen to have been allocated contiguously.
  229. This doesn't add pressure to the IOMMU allocator. However, some
  230. drivers don't support getting large merged segments coming back
  231. from *_map_sg().
  232. Most drivers don't have this problem; it is safe to say Y here.
  233. config IOMMU_HELPER
  234. def_bool PPC64
  235. config SWIOTLB
  236. bool "SWIOTLB support"
  237. default n
  238. select IOMMU_HELPER
  239. ---help---
  240. Support for IO bounce buffering for systems without an IOMMU.
  241. This allows us to DMA to the full physical address space on
  242. platforms where the size of a physical address is larger
  243. than the bus address. Not all platforms support this.
  244. config HOTPLUG_CPU
  245. bool "Support for enabling/disabling CPUs"
  246. depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
  247. ---help---
  248. Say Y here to be able to disable and re-enable individual
  249. CPUs at runtime on SMP machines.
  250. Say N if you are unsure.
  251. config ARCH_ENABLE_MEMORY_HOTPLUG
  252. def_bool y
  253. config ARCH_HAS_WALK_MEMORY
  254. def_bool y
  255. config ARCH_ENABLE_MEMORY_HOTREMOVE
  256. def_bool y
  257. config KEXEC
  258. bool "kexec system call (EXPERIMENTAL)"
  259. depends on PPC_BOOK3S && EXPERIMENTAL
  260. help
  261. kexec is a system call that implements the ability to shutdown your
  262. current kernel, and to start another kernel. It is like a reboot
  263. but it is independent of the system firmware. And like a reboot
  264. you can start any kernel with it, not just Linux.
  265. The name comes from the similarity to the exec system call.
  266. It is an ongoing process to be certain the hardware in a machine
  267. is properly shutdown, so do not be surprised if this code does not
  268. initially work for you. It may help to enable device hotplugging
  269. support. As of this writing the exact hardware interface is
  270. strongly in flux, so no good recommendation can be made.
  271. config CRASH_DUMP
  272. bool "Build a kdump crash kernel"
  273. depends on PPC64 || 6xx
  274. select RELOCATABLE if PPC64
  275. help
  276. Build a kernel suitable for use as a kdump capture kernel.
  277. The same kernel binary can be used as production kernel and dump
  278. capture kernel.
  279. config PHYP_DUMP
  280. bool "Hypervisor-assisted dump (EXPERIMENTAL)"
  281. depends on PPC_PSERIES && EXPERIMENTAL
  282. help
  283. Hypervisor-assisted dump is meant to be a kdump replacement
  284. offering robustness and speed not possible without system
  285. hypervisor assistance.
  286. If unsure, say "N"
  287. config PPCBUG_NVRAM
  288. bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
  289. default y if PPC_PREP
  290. config IRQ_ALL_CPUS
  291. bool "Distribute interrupts on all CPUs by default"
  292. depends on SMP && !MV64360
  293. help
  294. This option gives the kernel permission to distribute IRQs across
  295. multiple CPUs. Saying N here will route all IRQs to the first
  296. CPU. Generally saying Y is safe, although some problems have been
  297. reported with SMP Power Macintoshes with this option enabled.
  298. config NUMA
  299. bool "NUMA support"
  300. depends on PPC64
  301. default y if SMP && PPC_PSERIES
  302. config NODES_SHIFT
  303. int
  304. default "8" if PPC64
  305. default "4"
  306. depends on NEED_MULTIPLE_NODES
  307. config MAX_ACTIVE_REGIONS
  308. int
  309. default "256" if PPC64
  310. default "32"
  311. config ARCH_SELECT_MEMORY_MODEL
  312. def_bool y
  313. depends on PPC64
  314. config ARCH_FLATMEM_ENABLE
  315. def_bool y
  316. depends on (PPC64 && !NUMA) || PPC32
  317. config ARCH_SPARSEMEM_ENABLE
  318. def_bool y
  319. depends on PPC64
  320. select SPARSEMEM_VMEMMAP_ENABLE
  321. config ARCH_SPARSEMEM_DEFAULT
  322. def_bool y
  323. depends on (SMP && PPC_PSERIES) || PPC_PS3
  324. config ARCH_POPULATES_NODE_MAP
  325. def_bool y
  326. source "mm/Kconfig"
  327. config ARCH_MEMORY_PROBE
  328. def_bool y
  329. depends on MEMORY_HOTPLUG
  330. # Some NUMA nodes have memory ranges that span
  331. # other nodes. Even though a pfn is valid and
  332. # between a node's start and end pfns, it may not
  333. # reside on that node. See memmap_init_zone()
  334. # for details.
  335. config NODES_SPAN_OTHER_NODES
  336. def_bool y
  337. depends on NEED_MULTIPLE_NODES
  338. config PPC_HAS_HASH_64K
  339. bool
  340. depends on PPC64
  341. default n
  342. config STDBINUTILS
  343. bool "Using standard binutils settings"
  344. depends on 44x
  345. default y
  346. help
  347. Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
  348. Note, that kernel will be able to run only those applications,
  349. which had been compiled using binutils later than 2.17.50.0.3 with
  350. '-zmax-page-size' set to 256K (the default is 64K). Or, if using
  351. the older binutils, you can patch them with a trivial patch, which
  352. changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
  353. choice
  354. prompt "Page size"
  355. default PPC_4K_PAGES
  356. help
  357. Select the kernel logical page size. Increasing the page size
  358. will reduce software overhead at each page boundary, allow
  359. hardware prefetch mechanisms to be more effective, and allow
  360. larger dma transfers increasing IO efficiency and reducing
  361. overhead. However the utilization of memory will increase.
  362. For example, each cached file will using a multiple of the
  363. page size to hold its contents and the difference between the
  364. end of file and the end of page is wasted.
  365. Some dedicated systems, such as software raid serving with
  366. accelerated calculations, have shown significant increases.
  367. If you configure a 64 bit kernel for 64k pages but the
  368. processor does not support them, then the kernel will simulate
  369. them with 4k pages, loading them on demand, but with the
  370. reduced software overhead and larger internal fragmentation.
  371. For the 32 bit kernel, a large page option will not be offered
  372. unless it is supported by the configured processor.
  373. If unsure, choose 4K_PAGES.
  374. config PPC_4K_PAGES
  375. bool "4k page size"
  376. config PPC_16K_PAGES
  377. bool "16k page size" if 44x
  378. config PPC_64K_PAGES
  379. bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
  380. select PPC_HAS_HASH_64K if PPC_STD_MMU_64
  381. config PPC_256K_PAGES
  382. bool "256k page size" if 44x
  383. depends on !STDBINUTILS
  384. help
  385. Make the page size 256k.
  386. As the ELF standard only requires alignment to support page
  387. sizes up to 64k, you will need to compile all of your user
  388. space applications with a non-standard binutils settings
  389. (see the STDBINUTILS description for details).
  390. Say N unless you know what you are doing.
  391. endchoice
  392. config FORCE_MAX_ZONEORDER
  393. int "Maximum zone order"
  394. range 9 64 if PPC64 && PPC_64K_PAGES
  395. default "9" if PPC64 && PPC_64K_PAGES
  396. range 13 64 if PPC64 && !PPC_64K_PAGES
  397. default "13" if PPC64 && !PPC_64K_PAGES
  398. range 9 64 if PPC32 && PPC_16K_PAGES
  399. default "9" if PPC32 && PPC_16K_PAGES
  400. range 7 64 if PPC32 && PPC_64K_PAGES
  401. default "7" if PPC32 && PPC_64K_PAGES
  402. range 5 64 if PPC32 && PPC_256K_PAGES
  403. default "5" if PPC32 && PPC_256K_PAGES
  404. range 11 64
  405. default "11"
  406. help
  407. The kernel memory allocator divides physically contiguous memory
  408. blocks into "zones", where each zone is a power of two number of
  409. pages. This option selects the largest power of two that the kernel
  410. keeps in the memory allocator. If you need to allocate very large
  411. blocks of physically contiguous memory, then you may need to
  412. increase this value.
  413. This config option is actually maximum order plus one. For example,
  414. a value of 11 means that the largest free memory block is 2^10 pages.
  415. The page size is not necessarily 4KB. For example, on 64-bit
  416. systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
  417. this in mind when choosing a value for this option.
  418. config PPC_SUBPAGE_PROT
  419. bool "Support setting protections for 4k subpages"
  420. depends on PPC_STD_MMU_64 && PPC_64K_PAGES
  421. help
  422. This option adds support for a system call to allow user programs
  423. to set access permissions (read/write, readonly, or no access)
  424. on the 4k subpages of each 64k page.
  425. config SCHED_SMT
  426. bool "SMT (Hyperthreading) scheduler support"
  427. depends on PPC64 && SMP
  428. help
  429. SMT scheduler support improves the CPU scheduler's decision making
  430. when dealing with POWER5 cpus at a cost of slightly increased
  431. overhead in some places. If unsure say N here.
  432. config PROC_DEVICETREE
  433. bool "Support for device tree in /proc"
  434. depends on PROC_FS
  435. help
  436. This option adds a device-tree directory under /proc which contains
  437. an image of the device tree that the kernel copies from Open
  438. Firmware or other boot firmware. If unsure, say Y here.
  439. config CMDLINE_BOOL
  440. bool "Default bootloader kernel arguments"
  441. config CMDLINE
  442. string "Initial kernel command string"
  443. depends on CMDLINE_BOOL
  444. default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
  445. help
  446. On some platforms, there is currently no way for the boot loader to
  447. pass arguments to the kernel. For these platforms, you can supply
  448. some command-line options at build time by entering them here. In
  449. most cases you will need to specify the root device here.
  450. config EXTRA_TARGETS
  451. string "Additional default image types"
  452. help
  453. List additional targets to be built by the bootwrapper here (separated
  454. by spaces). This is useful for targets that depend of device tree
  455. files in the .dts directory.
  456. Targets in this list will be build as part of the default build
  457. target, or when the user does a 'make zImage' or a
  458. 'make zImage.initrd'.
  459. If unsure, leave blank
  460. if !44x || BROKEN
  461. config ARCH_WANTS_FREEZER_CONTROL
  462. def_bool y
  463. depends on ADB_PMU
  464. source kernel/power/Kconfig
  465. endif
  466. config SECCOMP
  467. bool "Enable seccomp to safely compute untrusted bytecode"
  468. depends on PROC_FS
  469. default y
  470. help
  471. This kernel feature is useful for number crunching applications
  472. that may need to compute untrusted bytecode during their
  473. execution. By using pipes or other transports made available to
  474. the process as file descriptors supporting the read/write
  475. syscalls, it's possible to isolate those applications in
  476. their own address space using seccomp. Once seccomp is
  477. enabled via /proc/<pid>/seccomp, it cannot be disabled
  478. and the task is only allowed to execute a few safe syscalls
  479. defined by each seccomp mode.
  480. If unsure, say Y. Only embedded should say N here.
  481. endmenu
  482. config ISA_DMA_API
  483. bool
  484. default !PPC_ISERIES || PCI
  485. menu "Bus options"
  486. config ISA
  487. bool "Support for ISA-bus hardware"
  488. depends on PPC_PREP || PPC_CHRP
  489. select PPC_I8259
  490. help
  491. Find out whether you have ISA slots on your motherboard. ISA is the
  492. name of a bus system, i.e. the way the CPU talks to the other stuff
  493. inside your box. If you have an Apple machine, say N here; if you
  494. have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
  495. you have an embedded board, consult your board documentation.
  496. config ZONE_DMA
  497. bool
  498. default y
  499. config GENERIC_ISA_DMA
  500. bool
  501. depends on PPC64 || POWER4 || 6xx && !CPM2
  502. default y
  503. config PPC_INDIRECT_PCI
  504. bool
  505. depends on PCI
  506. default y if 40x || 44x
  507. default n
  508. config EISA
  509. bool
  510. config SBUS
  511. bool
  512. config FSL_SOC
  513. bool
  514. config FSL_PCI
  515. bool
  516. select PPC_INDIRECT_PCI
  517. select PCI_QUIRKS
  518. config 4xx_SOC
  519. bool
  520. config FSL_LBC
  521. bool
  522. help
  523. Freescale Localbus support
  524. config FSL_GTM
  525. bool
  526. depends on PPC_83xx || QUICC_ENGINE || CPM2
  527. help
  528. Freescale General-purpose Timers support
  529. # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
  530. config MCA
  531. bool
  532. # Platforms that what PCI turned unconditionally just do select PCI
  533. # in their config node. Platforms that want to choose at config
  534. # time should select PPC_PCI_CHOICE
  535. config PPC_PCI_CHOICE
  536. bool
  537. config PCI
  538. bool "PCI support" if PPC_PCI_CHOICE
  539. default y if !40x && !CPM2 && !8xx && !PPC_83xx \
  540. && !PPC_85xx && !PPC_86xx
  541. default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
  542. default PCI_QSPAN if !4xx && !CPM2 && 8xx
  543. select ARCH_SUPPORTS_MSI
  544. help
  545. Find out whether your system includes a PCI bus. PCI is the name of
  546. a bus system, i.e. the way the CPU talks to the other stuff inside
  547. your box. If you say Y here, the kernel will include drivers and
  548. infrastructure code to support PCI bus devices.
  549. config PCI_DOMAINS
  550. def_bool PCI
  551. config PCI_SYSCALL
  552. def_bool PCI
  553. config PCI_QSPAN
  554. bool "QSpan PCI"
  555. depends on !4xx && !CPM2 && 8xx
  556. select PPC_I8259
  557. help
  558. Say Y here if you have a system based on a Motorola 8xx-series
  559. embedded processor with a QSPAN PCI interface, otherwise say N.
  560. config PCI_8260
  561. bool
  562. depends on PCI && 8260
  563. select PPC_INDIRECT_PCI
  564. default y
  565. config 8260_PCI9
  566. bool "Enable workaround for MPC826x erratum PCI 9"
  567. depends on PCI_8260 && !8272
  568. default y
  569. choice
  570. prompt "IDMA channel for PCI 9 workaround"
  571. depends on 8260_PCI9
  572. config 8260_PCI9_IDMA1
  573. bool "IDMA1"
  574. config 8260_PCI9_IDMA2
  575. bool "IDMA2"
  576. config 8260_PCI9_IDMA3
  577. bool "IDMA3"
  578. config 8260_PCI9_IDMA4
  579. bool "IDMA4"
  580. endchoice
  581. source "drivers/pci/pcie/Kconfig"
  582. source "drivers/pci/Kconfig"
  583. source "drivers/pcmcia/Kconfig"
  584. source "drivers/pci/hotplug/Kconfig"
  585. config HAS_RAPIDIO
  586. bool
  587. default n
  588. config RAPIDIO
  589. bool "RapidIO support"
  590. depends on HAS_RAPIDIO
  591. help
  592. If you say Y here, the kernel will include drivers and
  593. infrastructure code to support RapidIO interconnect devices.
  594. source "drivers/rapidio/Kconfig"
  595. endmenu
  596. menu "Advanced setup"
  597. depends on PPC32
  598. config ADVANCED_OPTIONS
  599. bool "Prompt for advanced kernel configuration options"
  600. help
  601. This option will enable prompting for a variety of advanced kernel
  602. configuration options. These options can cause the kernel to not
  603. work if they are set incorrectly, but can be used to optimize certain
  604. aspects of kernel memory management.
  605. Unless you know what you are doing, say N here.
  606. comment "Default settings for advanced configuration options are used"
  607. depends on !ADVANCED_OPTIONS
  608. config LOWMEM_SIZE_BOOL
  609. bool "Set maximum low memory"
  610. depends on ADVANCED_OPTIONS
  611. help
  612. This option allows you to set the maximum amount of memory which
  613. will be used as "low memory", that is, memory which the kernel can
  614. access directly, without having to set up a kernel virtual mapping.
  615. This can be useful in optimizing the layout of kernel virtual
  616. memory.
  617. Say N here unless you know what you are doing.
  618. config LOWMEM_SIZE
  619. hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
  620. default "0x30000000"
  621. config LOWMEM_CAM_NUM_BOOL
  622. bool "Set number of CAMs to use to map low memory"
  623. depends on ADVANCED_OPTIONS && FSL_BOOKE
  624. help
  625. This option allows you to set the maximum number of CAM slots that
  626. will be used to map low memory. There are a limited number of slots
  627. available and even more limited number that will fit in the L1 MMU.
  628. However, using more entries will allow mapping more low memory. This
  629. can be useful in optimizing the layout of kernel virtual memory.
  630. Say N here unless you know what you are doing.
  631. config LOWMEM_CAM_NUM
  632. depends on FSL_BOOKE
  633. int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
  634. default 3
  635. config RELOCATABLE
  636. bool "Build a relocatable kernel (EXPERIMENTAL)"
  637. depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  638. help
  639. This builds a kernel image that is capable of running at the
  640. location the kernel is loaded at (some alignment restrictions may
  641. exist).
  642. One use is for the kexec on panic case where the recovery kernel
  643. must live at a different physical address than the primary
  644. kernel.
  645. Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
  646. it has been loaded at and the compile time physical addresses
  647. CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
  648. setting can still be useful to bootwrappers that need to know the
  649. load location of the kernel (eg. u-boot/mkimage).
  650. config PAGE_OFFSET_BOOL
  651. bool "Set custom page offset address"
  652. depends on ADVANCED_OPTIONS
  653. help
  654. This option allows you to set the kernel virtual address at which
  655. the kernel will map low memory. This can be useful in optimizing
  656. the virtual memory layout of the system.
  657. Say N here unless you know what you are doing.
  658. config PAGE_OFFSET
  659. hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
  660. default "0xc0000000"
  661. config KERNEL_START_BOOL
  662. bool "Set custom kernel base address"
  663. depends on ADVANCED_OPTIONS
  664. help
  665. This option allows you to set the kernel virtual address at which
  666. the kernel will be loaded. Normally this should match PAGE_OFFSET
  667. however there are times (like kdump) that one might not want them
  668. to be the same.
  669. Say N here unless you know what you are doing.
  670. config KERNEL_START
  671. hex "Virtual address of kernel base" if KERNEL_START_BOOL
  672. default PAGE_OFFSET if PAGE_OFFSET_BOOL
  673. default "0xc2000000" if CRASH_DUMP
  674. default "0xc0000000"
  675. config PHYSICAL_START_BOOL
  676. bool "Set physical address where the kernel is loaded"
  677. depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  678. help
  679. This gives the physical address where the kernel is loaded.
  680. Say N here unless you know what you are doing.
  681. config PHYSICAL_START
  682. hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
  683. default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
  684. default "0x00000000"
  685. config PHYSICAL_ALIGN
  686. hex
  687. default "0x04000000" if FSL_BOOKE
  688. help
  689. This value puts the alignment restrictions on physical address
  690. where kernel is loaded and run from. Kernel is compiled for an
  691. address which meets above alignment restriction.
  692. config TASK_SIZE_BOOL
  693. bool "Set custom user task size"
  694. depends on ADVANCED_OPTIONS
  695. help
  696. This option allows you to set the amount of virtual address space
  697. allocated to user tasks. This can be useful in optimizing the
  698. virtual memory layout of the system.
  699. Say N here unless you know what you are doing.
  700. config TASK_SIZE
  701. hex "Size of user task space" if TASK_SIZE_BOOL
  702. default "0x80000000" if PPC_PREP || PPC_8xx
  703. default "0xc0000000"
  704. config CONSISTENT_SIZE_BOOL
  705. bool "Set custom consistent memory pool size"
  706. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  707. help
  708. This option allows you to set the size of the
  709. consistent memory pool. This pool of virtual memory
  710. is used to make consistent memory allocations.
  711. config CONSISTENT_SIZE
  712. hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
  713. default "0x00200000" if NOT_COHERENT_CACHE
  714. config PIN_TLB
  715. bool "Pinned Kernel TLBs (860 ONLY)"
  716. depends on ADVANCED_OPTIONS && 8xx
  717. endmenu
  718. if PPC64
  719. config RELOCATABLE
  720. bool "Build a relocatable kernel"
  721. help
  722. This builds a kernel image that is capable of running anywhere
  723. in the RMA (real memory area) at any 16k-aligned base address.
  724. The kernel is linked as a position-independent executable (PIE)
  725. and contains dynamic relocations which are processed early
  726. in the bootup process.
  727. One use is for the kexec on panic case where the recovery kernel
  728. must live at a different physical address than the primary
  729. kernel.
  730. config PAGE_OFFSET
  731. hex
  732. default "0xc000000000000000"
  733. config KERNEL_START
  734. hex
  735. default "0xc000000000000000"
  736. config PHYSICAL_START
  737. hex
  738. default "0x00000000"
  739. endif
  740. source "net/Kconfig"
  741. source "drivers/Kconfig"
  742. source "fs/Kconfig"
  743. source "arch/powerpc/sysdev/qe_lib/Kconfig"
  744. source "lib/Kconfig"
  745. source "arch/powerpc/Kconfig.debug"
  746. source "security/Kconfig"
  747. config KEYS_COMPAT
  748. bool
  749. depends on COMPAT && KEYS
  750. default y
  751. source "crypto/Kconfig"
  752. config PPC_CLOCK
  753. bool
  754. default n
  755. select HAVE_CLK
  756. config PPC_LIB_RHEAP
  757. bool
  758. source "arch/powerpc/kvm/Kconfig"