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