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 IRQ_PER_CPU
  38. bool
  39. default y
  40. config STACKTRACE_SUPPORT
  41. bool
  42. default y
  43. config HAVE_LATENCYTOP_SUPPORT
  44. def_bool y
  45. config TRACE_IRQFLAGS_SUPPORT
  46. bool
  47. depends on PPC64
  48. default y
  49. config LOCKDEP_SUPPORT
  50. bool
  51. default y
  52. config RWSEM_GENERIC_SPINLOCK
  53. bool
  54. config RWSEM_XCHGADD_ALGORITHM
  55. bool
  56. default y
  57. config GENERIC_LOCKBREAK
  58. bool
  59. default y
  60. depends on SMP && PREEMPT
  61. config ARCH_HAS_ILOG2_U32
  62. bool
  63. default y
  64. config ARCH_HAS_ILOG2_U64
  65. bool
  66. default y if 64BIT
  67. config GENERIC_HWEIGHT
  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. select GENERIC_ATOMIC64 if PPC32
  100. select HAVE_PERF_COUNTERS
  101. config EARLY_PRINTK
  102. bool
  103. default y
  104. config COMPAT
  105. bool
  106. default y if PPC64
  107. select COMPAT_BINFMT_ELF
  108. config SYSVIPC_COMPAT
  109. bool
  110. depends on COMPAT && SYSVIPC
  111. default y
  112. # All PPC32s use generic nvram driver through ppc_md
  113. config GENERIC_NVRAM
  114. bool
  115. default y if PPC32
  116. config SCHED_OMIT_FRAME_POINTER
  117. bool
  118. default y
  119. config ARCH_MAY_HAVE_PC_FDC
  120. bool
  121. default !PPC_PSERIES || PCI
  122. config PPC_OF
  123. def_bool y
  124. config OF
  125. def_bool y
  126. config PPC_UDBG_16550
  127. bool
  128. default n
  129. config GENERIC_TBSYNC
  130. bool
  131. default y if PPC32 && SMP
  132. default n
  133. config AUDIT_ARCH
  134. bool
  135. default y
  136. config GENERIC_BUG
  137. bool
  138. default y
  139. depends on BUG
  140. config SYS_SUPPORTS_APM_EMULATION
  141. default y if PMAC_APM_EMU
  142. bool
  143. config DTC
  144. bool
  145. default y
  146. config DEFAULT_UIMAGE
  147. bool
  148. help
  149. Used to allow a board to specify it wants a uImage built by default
  150. default n
  151. config REDBOOT
  152. bool
  153. config HIBERNATE_32
  154. bool
  155. depends on (PPC_PMAC && !SMP) || BROKEN
  156. default y
  157. config HIBERNATE_64
  158. bool
  159. depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
  160. default y
  161. config ARCH_HIBERNATION_POSSIBLE
  162. bool
  163. depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
  164. default y
  165. config ARCH_SUSPEND_POSSIBLE
  166. def_bool y
  167. depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
  168. config PPC_DCR_NATIVE
  169. bool
  170. default n
  171. config PPC_DCR_MMIO
  172. bool
  173. default n
  174. config PPC_DCR
  175. bool
  176. depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
  177. default y
  178. config PPC_OF_PLATFORM_PCI
  179. bool
  180. depends on PCI
  181. depends on PPC64 # not supported on 32 bits yet
  182. default n
  183. config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  184. def_bool y
  185. source "init/Kconfig"
  186. source "kernel/Kconfig.freezer"
  187. source "arch/powerpc/sysdev/Kconfig"
  188. source "arch/powerpc/platforms/Kconfig"
  189. menu "Kernel options"
  190. config HIGHMEM
  191. bool "High memory support"
  192. depends on PPC32
  193. source kernel/time/Kconfig
  194. source kernel/Kconfig.hz
  195. source kernel/Kconfig.preempt
  196. source "fs/Kconfig.binfmt"
  197. config HUGETLB_PAGE_SIZE_VARIABLE
  198. bool
  199. depends on HUGETLB_PAGE
  200. default y
  201. config MATH_EMULATION
  202. bool "Math emulation"
  203. depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
  204. ---help---
  205. Some PowerPC chips designed for embedded applications do not have
  206. a floating-point unit and therefore do not implement the
  207. floating-point instructions in the PowerPC instruction set. If you
  208. say Y here, the kernel will include code to emulate a floating-point
  209. unit, which will allow programs that use floating-point
  210. instructions to run.
  211. config 8XX_MINIMAL_FPEMU
  212. bool "Minimal math emulation for 8xx"
  213. depends on 8xx && !MATH_EMULATION
  214. help
  215. Older arch/ppc kernels still emulated a few floating point
  216. instructions such as load and store, even when full math
  217. emulation is disabled. Say "Y" here if you want to preserve
  218. this behavior.
  219. It is recommended that you build a soft-float userspace instead.
  220. config IOMMU_VMERGE
  221. bool "Enable IOMMU virtual merging"
  222. depends on PPC64
  223. default y
  224. help
  225. Cause IO segments sent to a device for DMA to be merged virtually
  226. by the IOMMU when they happen to have been allocated contiguously.
  227. This doesn't add pressure to the IOMMU allocator. However, some
  228. drivers don't support getting large merged segments coming back
  229. from *_map_sg().
  230. Most drivers don't have this problem; it is safe to say Y here.
  231. config IOMMU_HELPER
  232. def_bool PPC64
  233. config SWIOTLB
  234. bool "SWIOTLB support"
  235. default n
  236. select IOMMU_HELPER
  237. ---help---
  238. Support for IO bounce buffering for systems without an IOMMU.
  239. This allows us to DMA to the full physical address space on
  240. platforms where the size of a physical address is larger
  241. than the bus address. Not all platforms support this.
  242. config PPC_NEED_DMA_SYNC_OPS
  243. def_bool y
  244. depends on (NOT_COHERENT_CACHE || SWIOTLB)
  245. config HOTPLUG_CPU
  246. bool "Support for enabling/disabling CPUs"
  247. depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
  248. ---help---
  249. Say Y here to be able to disable and re-enable individual
  250. CPUs at runtime on SMP machines.
  251. Say N if you are unsure.
  252. config ARCH_ENABLE_MEMORY_HOTPLUG
  253. def_bool y
  254. config ARCH_HAS_WALK_MEMORY
  255. def_bool y
  256. config ARCH_ENABLE_MEMORY_HOTREMOVE
  257. def_bool y
  258. config KEXEC
  259. bool "kexec system call (EXPERIMENTAL)"
  260. depends on PPC_BOOK3S && EXPERIMENTAL
  261. help
  262. kexec is a system call that implements the ability to shutdown your
  263. current kernel, and to start another kernel. It is like a reboot
  264. but it is independent of the system firmware. And like a reboot
  265. you can start any kernel with it, not just Linux.
  266. The name comes from the similarity to the exec system call.
  267. It is an ongoing process to be certain the hardware in a machine
  268. is properly shutdown, so do not be surprised if this code does not
  269. initially work for you. It may help to enable device hotplugging
  270. support. As of this writing the exact hardware interface is
  271. strongly in flux, so no good recommendation can be made.
  272. config CRASH_DUMP
  273. bool "Build a kdump crash kernel"
  274. depends on PPC64 || 6xx
  275. select RELOCATABLE if PPC64
  276. help
  277. Build a kernel suitable for use as a kdump capture kernel.
  278. The same kernel binary can be used as production kernel and dump
  279. capture kernel.
  280. config PHYP_DUMP
  281. bool "Hypervisor-assisted dump (EXPERIMENTAL)"
  282. depends on PPC_PSERIES && EXPERIMENTAL
  283. help
  284. Hypervisor-assisted dump is meant to be a kdump replacement
  285. offering robustness and speed not possible without system
  286. hypervisor assistance.
  287. If unsure, say "N"
  288. config PPCBUG_NVRAM
  289. bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
  290. default y if PPC_PREP
  291. config IRQ_ALL_CPUS
  292. bool "Distribute interrupts on all CPUs by default"
  293. depends on SMP && !MV64360
  294. help
  295. This option gives the kernel permission to distribute IRQs across
  296. multiple CPUs. Saying N here will route all IRQs to the first
  297. CPU. Generally saying Y is safe, although some problems have been
  298. reported with SMP Power Macintoshes with this option enabled.
  299. config NUMA
  300. bool "NUMA support"
  301. depends on PPC64
  302. default y if SMP && PPC_PSERIES
  303. config NODES_SHIFT
  304. int
  305. default "4"
  306. depends on NEED_MULTIPLE_NODES
  307. config ARCH_SELECT_MEMORY_MODEL
  308. def_bool y
  309. depends on PPC64
  310. config ARCH_FLATMEM_ENABLE
  311. def_bool y
  312. depends on (PPC64 && !NUMA) || PPC32
  313. config ARCH_SPARSEMEM_ENABLE
  314. def_bool y
  315. depends on PPC64
  316. select SPARSEMEM_VMEMMAP_ENABLE
  317. config ARCH_SPARSEMEM_DEFAULT
  318. def_bool y
  319. depends on (SMP && PPC_PSERIES) || PPC_PS3
  320. config ARCH_POPULATES_NODE_MAP
  321. def_bool y
  322. source "mm/Kconfig"
  323. config ARCH_MEMORY_PROBE
  324. def_bool y
  325. depends on MEMORY_HOTPLUG
  326. # Some NUMA nodes have memory ranges that span
  327. # other nodes. Even though a pfn is valid and
  328. # between a node's start and end pfns, it may not
  329. # reside on that node. See memmap_init_zone()
  330. # for details.
  331. config NODES_SPAN_OTHER_NODES
  332. def_bool y
  333. depends on NEED_MULTIPLE_NODES
  334. config PPC_HAS_HASH_64K
  335. bool
  336. depends on PPC64
  337. default n
  338. config STDBINUTILS
  339. bool "Using standard binutils settings"
  340. depends on 44x
  341. default y
  342. help
  343. Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
  344. Note, that kernel will be able to run only those applications,
  345. which had been compiled using binutils later than 2.17.50.0.3 with
  346. '-zmax-page-size' set to 256K (the default is 64K). Or, if using
  347. the older binutils, you can patch them with a trivial patch, which
  348. changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
  349. choice
  350. prompt "Page size"
  351. default PPC_4K_PAGES
  352. help
  353. Select the kernel logical page size. Increasing the page size
  354. will reduce software overhead at each page boundary, allow
  355. hardware prefetch mechanisms to be more effective, and allow
  356. larger dma transfers increasing IO efficiency and reducing
  357. overhead. However the utilization of memory will increase.
  358. For example, each cached file will using a multiple of the
  359. page size to hold its contents and the difference between the
  360. end of file and the end of page is wasted.
  361. Some dedicated systems, such as software raid serving with
  362. accelerated calculations, have shown significant increases.
  363. If you configure a 64 bit kernel for 64k pages but the
  364. processor does not support them, then the kernel will simulate
  365. them with 4k pages, loading them on demand, but with the
  366. reduced software overhead and larger internal fragmentation.
  367. For the 32 bit kernel, a large page option will not be offered
  368. unless it is supported by the configured processor.
  369. If unsure, choose 4K_PAGES.
  370. config PPC_4K_PAGES
  371. bool "4k page size"
  372. config PPC_16K_PAGES
  373. bool "16k page size" if 44x
  374. config PPC_64K_PAGES
  375. bool "64k page size" if 44x || PPC_STD_MMU_64
  376. select PPC_HAS_HASH_64K if PPC_STD_MMU_64
  377. config PPC_256K_PAGES
  378. bool "256k page size" if 44x
  379. depends on !STDBINUTILS
  380. help
  381. Make the page size 256k.
  382. As the ELF standard only requires alignment to support page
  383. sizes up to 64k, you will need to compile all of your user
  384. space applications with a non-standard binutils settings
  385. (see the STDBINUTILS description for details).
  386. Say N unless you know what you are doing.
  387. endchoice
  388. config FORCE_MAX_ZONEORDER
  389. int "Maximum zone order"
  390. range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
  391. default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
  392. range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
  393. default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
  394. range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
  395. default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
  396. range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
  397. default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
  398. range 5 64 if PPC_STD_MMU_32 && PPC_256K_PAGES
  399. default "5" if PPC_STD_MMU_32 && PPC_256K_PAGES
  400. range 11 64
  401. default "11"
  402. help
  403. The kernel memory allocator divides physically contiguous memory
  404. blocks into "zones", where each zone is a power of two number of
  405. pages. This option selects the largest power of two that the kernel
  406. keeps in the memory allocator. If you need to allocate very large
  407. blocks of physically contiguous memory, then you may need to
  408. increase this value.
  409. This config option is actually maximum order plus one. For example,
  410. a value of 11 means that the largest free memory block is 2^10 pages.
  411. The page size is not necessarily 4KB. For example, on 64-bit
  412. systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
  413. this in mind when choosing a value for this option.
  414. config PPC_SUBPAGE_PROT
  415. bool "Support setting protections for 4k subpages"
  416. depends on PPC_STD_MMU_64 && PPC_64K_PAGES
  417. help
  418. This option adds support for a system call to allow user programs
  419. to set access permissions (read/write, readonly, or no access)
  420. on the 4k subpages of each 64k page.
  421. config SCHED_SMT
  422. bool "SMT (Hyperthreading) scheduler support"
  423. depends on PPC64 && SMP
  424. help
  425. SMT scheduler support improves the CPU scheduler's decision making
  426. when dealing with POWER5 cpus at a cost of slightly increased
  427. overhead in some places. If unsure say N here.
  428. config PROC_DEVICETREE
  429. bool "Support for device tree in /proc"
  430. depends on PROC_FS
  431. help
  432. This option adds a device-tree directory under /proc which contains
  433. an image of the device tree that the kernel copies from Open
  434. Firmware or other boot firmware. If unsure, say Y here.
  435. config CMDLINE_BOOL
  436. bool "Default bootloader kernel arguments"
  437. config CMDLINE
  438. string "Initial kernel command string"
  439. depends on CMDLINE_BOOL
  440. default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
  441. help
  442. On some platforms, there is currently no way for the boot loader to
  443. pass arguments to the kernel. For these platforms, you can supply
  444. some command-line options at build time by entering them here. In
  445. most cases you will need to specify the root device here.
  446. config EXTRA_TARGETS
  447. string "Additional default image types"
  448. help
  449. List additional targets to be built by the bootwrapper here (separated
  450. by spaces). This is useful for targets that depend of device tree
  451. files in the .dts directory.
  452. Targets in this list will be build as part of the default build
  453. target, or when the user does a 'make zImage' or a
  454. 'make zImage.initrd'.
  455. If unsure, leave blank
  456. if !44x || BROKEN
  457. config ARCH_WANTS_FREEZER_CONTROL
  458. def_bool y
  459. depends on ADB_PMU
  460. source kernel/power/Kconfig
  461. endif
  462. config SECCOMP
  463. bool "Enable seccomp to safely compute untrusted bytecode"
  464. depends on PROC_FS
  465. default y
  466. help
  467. This kernel feature is useful for number crunching applications
  468. that may need to compute untrusted bytecode during their
  469. execution. By using pipes or other transports made available to
  470. the process as file descriptors supporting the read/write
  471. syscalls, it's possible to isolate those applications in
  472. their own address space using seccomp. Once seccomp is
  473. enabled via /proc/<pid>/seccomp, it cannot be disabled
  474. and the task is only allowed to execute a few safe syscalls
  475. defined by each seccomp mode.
  476. If unsure, say Y. Only embedded should say N here.
  477. endmenu
  478. config ISA_DMA_API
  479. bool
  480. default !PPC_ISERIES || PCI
  481. menu "Bus options"
  482. config ISA
  483. bool "Support for ISA-bus hardware"
  484. depends on PPC_PREP || PPC_CHRP
  485. select PPC_I8259
  486. help
  487. Find out whether you have ISA slots on your motherboard. ISA is the
  488. name of a bus system, i.e. the way the CPU talks to the other stuff
  489. inside your box. If you have an Apple machine, say N here; if you
  490. have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
  491. you have an embedded board, consult your board documentation.
  492. config ZONE_DMA
  493. bool
  494. default y
  495. config GENERIC_ISA_DMA
  496. bool
  497. depends on PPC64 || POWER4 || 6xx && !CPM2
  498. default y
  499. config PPC_INDIRECT_PCI
  500. bool
  501. depends on PCI
  502. default y if 40x || 44x
  503. default n
  504. config EISA
  505. bool
  506. config SBUS
  507. bool
  508. config FSL_SOC
  509. bool
  510. config FSL_PCI
  511. bool
  512. select PPC_INDIRECT_PCI
  513. select PCI_QUIRKS
  514. config 4xx_SOC
  515. bool
  516. config FSL_LBC
  517. bool
  518. help
  519. Freescale Localbus support
  520. config FSL_GTM
  521. bool
  522. depends on PPC_83xx || QUICC_ENGINE || CPM2
  523. help
  524. Freescale General-purpose Timers support
  525. # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
  526. config MCA
  527. bool
  528. # Platforms that what PCI turned unconditionally just do select PCI
  529. # in their config node. Platforms that want to choose at config
  530. # time should select PPC_PCI_CHOICE
  531. config PPC_PCI_CHOICE
  532. bool
  533. config PCI
  534. bool "PCI support" if PPC_PCI_CHOICE
  535. default y if !40x && !CPM2 && !8xx && !PPC_83xx \
  536. && !PPC_85xx && !PPC_86xx
  537. default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
  538. default PCI_QSPAN if !4xx && !CPM2 && 8xx
  539. select ARCH_SUPPORTS_MSI
  540. help
  541. Find out whether your system includes a PCI bus. PCI is the name of
  542. a bus system, i.e. the way the CPU talks to the other stuff inside
  543. your box. If you say Y here, the kernel will include drivers and
  544. infrastructure code to support PCI bus devices.
  545. config PCI_DOMAINS
  546. def_bool PCI
  547. config PCI_SYSCALL
  548. def_bool PCI
  549. config PCI_QSPAN
  550. bool "QSpan PCI"
  551. depends on !4xx && !CPM2 && 8xx
  552. select PPC_I8259
  553. help
  554. Say Y here if you have a system based on a Motorola 8xx-series
  555. embedded processor with a QSPAN PCI interface, otherwise say N.
  556. config PCI_8260
  557. bool
  558. depends on PCI && 8260
  559. select PPC_INDIRECT_PCI
  560. default y
  561. config 8260_PCI9
  562. bool "Enable workaround for MPC826x erratum PCI 9"
  563. depends on PCI_8260 && !8272
  564. default y
  565. choice
  566. prompt "IDMA channel for PCI 9 workaround"
  567. depends on 8260_PCI9
  568. config 8260_PCI9_IDMA1
  569. bool "IDMA1"
  570. config 8260_PCI9_IDMA2
  571. bool "IDMA2"
  572. config 8260_PCI9_IDMA3
  573. bool "IDMA3"
  574. config 8260_PCI9_IDMA4
  575. bool "IDMA4"
  576. endchoice
  577. source "drivers/pci/pcie/Kconfig"
  578. source "drivers/pci/Kconfig"
  579. source "drivers/pcmcia/Kconfig"
  580. source "drivers/pci/hotplug/Kconfig"
  581. config HAS_RAPIDIO
  582. bool
  583. default n
  584. config RAPIDIO
  585. bool "RapidIO support"
  586. depends on HAS_RAPIDIO
  587. help
  588. If you say Y here, the kernel will include drivers and
  589. infrastructure code to support RapidIO interconnect devices.
  590. source "drivers/rapidio/Kconfig"
  591. endmenu
  592. menu "Advanced setup"
  593. depends on PPC32
  594. config ADVANCED_OPTIONS
  595. bool "Prompt for advanced kernel configuration options"
  596. help
  597. This option will enable prompting for a variety of advanced kernel
  598. configuration options. These options can cause the kernel to not
  599. work if they are set incorrectly, but can be used to optimize certain
  600. aspects of kernel memory management.
  601. Unless you know what you are doing, say N here.
  602. comment "Default settings for advanced configuration options are used"
  603. depends on !ADVANCED_OPTIONS
  604. config LOWMEM_SIZE_BOOL
  605. bool "Set maximum low memory"
  606. depends on ADVANCED_OPTIONS
  607. help
  608. This option allows you to set the maximum amount of memory which
  609. will be used as "low memory", that is, memory which the kernel can
  610. access directly, without having to set up a kernel virtual mapping.
  611. This can be useful in optimizing the layout of kernel virtual
  612. memory.
  613. Say N here unless you know what you are doing.
  614. config LOWMEM_SIZE
  615. hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
  616. default "0x30000000"
  617. config LOWMEM_CAM_NUM_BOOL
  618. bool "Set number of CAMs to use to map low memory"
  619. depends on ADVANCED_OPTIONS && FSL_BOOKE
  620. help
  621. This option allows you to set the maximum number of CAM slots that
  622. will be used to map low memory. There are a limited number of slots
  623. available and even more limited number that will fit in the L1 MMU.
  624. However, using more entries will allow mapping more low memory. This
  625. can be useful in optimizing the layout of kernel virtual memory.
  626. Say N here unless you know what you are doing.
  627. config LOWMEM_CAM_NUM
  628. depends on FSL_BOOKE
  629. int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
  630. default 3
  631. config RELOCATABLE
  632. bool "Build a relocatable kernel (EXPERIMENTAL)"
  633. depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  634. help
  635. This builds a kernel image that is capable of running at the
  636. location the kernel is loaded at (some alignment restrictions may
  637. exist).
  638. One use is for the kexec on panic case where the recovery kernel
  639. must live at a different physical address than the primary
  640. kernel.
  641. Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
  642. it has been loaded at and the compile time physical addresses
  643. CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
  644. setting can still be useful to bootwrappers that need to know the
  645. load location of the kernel (eg. u-boot/mkimage).
  646. config PAGE_OFFSET_BOOL
  647. bool "Set custom page offset address"
  648. depends on ADVANCED_OPTIONS
  649. help
  650. This option allows you to set the kernel virtual address at which
  651. the kernel will map low memory. This can be useful in optimizing
  652. the virtual memory layout of the system.
  653. Say N here unless you know what you are doing.
  654. config PAGE_OFFSET
  655. hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
  656. default "0xc0000000"
  657. config KERNEL_START_BOOL
  658. bool "Set custom kernel base address"
  659. depends on ADVANCED_OPTIONS
  660. help
  661. This option allows you to set the kernel virtual address at which
  662. the kernel will be loaded. Normally this should match PAGE_OFFSET
  663. however there are times (like kdump) that one might not want them
  664. to be the same.
  665. Say N here unless you know what you are doing.
  666. config KERNEL_START
  667. hex "Virtual address of kernel base" if KERNEL_START_BOOL
  668. default PAGE_OFFSET if PAGE_OFFSET_BOOL
  669. default "0xc2000000" if CRASH_DUMP
  670. default "0xc0000000"
  671. config PHYSICAL_START_BOOL
  672. bool "Set physical address where the kernel is loaded"
  673. depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  674. help
  675. This gives the physical address where the kernel is loaded.
  676. Say N here unless you know what you are doing.
  677. config PHYSICAL_START
  678. hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
  679. default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
  680. default "0x00000000"
  681. config PHYSICAL_ALIGN
  682. hex
  683. default "0x04000000" if FSL_BOOKE
  684. help
  685. This value puts the alignment restrictions on physical address
  686. where kernel is loaded and run from. Kernel is compiled for an
  687. address which meets above alignment restriction.
  688. config TASK_SIZE_BOOL
  689. bool "Set custom user task size"
  690. depends on ADVANCED_OPTIONS
  691. help
  692. This option allows you to set the amount of virtual address space
  693. allocated to user tasks. This can be useful in optimizing the
  694. virtual memory layout of the system.
  695. Say N here unless you know what you are doing.
  696. config TASK_SIZE
  697. hex "Size of user task space" if TASK_SIZE_BOOL
  698. default "0x80000000" if PPC_PREP || PPC_8xx
  699. default "0xc0000000"
  700. config CONSISTENT_SIZE_BOOL
  701. bool "Set custom consistent memory pool size"
  702. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  703. help
  704. This option allows you to set the size of the
  705. consistent memory pool. This pool of virtual memory
  706. is used to make consistent memory allocations.
  707. config CONSISTENT_SIZE
  708. hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
  709. default "0x00200000" if NOT_COHERENT_CACHE
  710. config PIN_TLB
  711. bool "Pinned Kernel TLBs (860 ONLY)"
  712. depends on ADVANCED_OPTIONS && 8xx
  713. endmenu
  714. if PPC64
  715. config RELOCATABLE
  716. bool "Build a relocatable kernel"
  717. help
  718. This builds a kernel image that is capable of running anywhere
  719. in the RMA (real memory area) at any 16k-aligned base address.
  720. The kernel is linked as a position-independent executable (PIE)
  721. and contains dynamic relocations which are processed early
  722. in the bootup process.
  723. One use is for the kexec on panic case where the recovery kernel
  724. must live at a different physical address than the primary
  725. kernel.
  726. config PAGE_OFFSET
  727. hex
  728. default "0xc000000000000000"
  729. config KERNEL_START
  730. hex
  731. default "0xc000000000000000"
  732. config PHYSICAL_START
  733. hex
  734. default "0x00000000"
  735. endif
  736. source "net/Kconfig"
  737. source "drivers/Kconfig"
  738. source "fs/Kconfig"
  739. source "arch/powerpc/sysdev/qe_lib/Kconfig"
  740. source "lib/Kconfig"
  741. source "arch/powerpc/Kconfig.debug"
  742. source "security/Kconfig"
  743. config KEYS_COMPAT
  744. bool
  745. depends on COMPAT && KEYS
  746. default y
  747. source "crypto/Kconfig"
  748. config PPC_CLOCK
  749. bool
  750. default n
  751. select HAVE_CLK
  752. config PPC_LIB_RHEAP
  753. bool
  754. source "arch/powerpc/kvm/Kconfig"