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 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. config STDBINUTILS
  322. bool "Using standard binutils settings"
  323. depends on 44x
  324. default y
  325. help
  326. Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
  327. Note, that kernel will be able to run only those applications,
  328. which had been compiled using binutils later than 2.17.50.0.3 with
  329. '-zmax-page-size' set to 256K (the default is 64K). Or, if using
  330. the older binutils, you can patch them with a trivial patch, which
  331. changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
  332. choice
  333. prompt "Page size"
  334. default PPC_4K_PAGES
  335. help
  336. Select the kernel logical page size. Increasing the page size
  337. will reduce software overhead at each page boundary, allow
  338. hardware prefetch mechanisms to be more effective, and allow
  339. larger dma transfers increasing IO efficiency and reducing
  340. overhead. However the utilization of memory will increase.
  341. For example, each cached file will using a multiple of the
  342. page size to hold its contents and the difference between the
  343. end of file and the end of page is wasted.
  344. Some dedicated systems, such as software raid serving with
  345. accelerated calculations, have shown significant increases.
  346. If you configure a 64 bit kernel for 64k pages but the
  347. processor does not support them, then the kernel will simulate
  348. them with 4k pages, loading them on demand, but with the
  349. reduced software overhead and larger internal fragmentation.
  350. For the 32 bit kernel, a large page option will not be offered
  351. unless it is supported by the configured processor.
  352. If unsure, choose 4K_PAGES.
  353. config PPC_4K_PAGES
  354. bool "4k page size"
  355. config PPC_16K_PAGES
  356. bool "16k page size" if 44x
  357. config PPC_64K_PAGES
  358. bool "64k page size" if 44x || PPC_STD_MMU_64
  359. select PPC_HAS_HASH_64K if PPC_STD_MMU_64
  360. config PPC_256K_PAGES
  361. bool "256k page size" if 44x
  362. depends on !STDBINUTILS && (!SHMEM || BROKEN)
  363. help
  364. Make the page size 256k.
  365. As the ELF standard only requires alignment to support page
  366. sizes up to 64k, you will need to compile all of your user
  367. space applications with a non-standard binutils settings
  368. (see the STDBINUTILS description for details).
  369. Say N unless you know what you are doing.
  370. endchoice
  371. config FORCE_MAX_ZONEORDER
  372. int "Maximum zone order"
  373. range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
  374. default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
  375. range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
  376. default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
  377. range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
  378. default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
  379. range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
  380. default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
  381. range 5 64 if PPC_STD_MMU_32 && PPC_256K_PAGES
  382. default "5" if PPC_STD_MMU_32 && PPC_256K_PAGES
  383. range 11 64
  384. default "11"
  385. help
  386. The kernel memory allocator divides physically contiguous memory
  387. blocks into "zones", where each zone is a power of two number of
  388. pages. This option selects the largest power of two that the kernel
  389. keeps in the memory allocator. If you need to allocate very large
  390. blocks of physically contiguous memory, then you may need to
  391. increase this value.
  392. This config option is actually maximum order plus one. For example,
  393. a value of 11 means that the largest free memory block is 2^10 pages.
  394. The page size is not necessarily 4KB. For example, on 64-bit
  395. systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
  396. this in mind when choosing a value for this option.
  397. config PPC_SUBPAGE_PROT
  398. bool "Support setting protections for 4k subpages"
  399. depends on PPC_STD_MMU_64 && PPC_64K_PAGES
  400. help
  401. This option adds support for a system call to allow user programs
  402. to set access permissions (read/write, readonly, or no access)
  403. on the 4k subpages of each 64k page.
  404. config SCHED_SMT
  405. bool "SMT (Hyperthreading) scheduler support"
  406. depends on PPC64 && SMP
  407. help
  408. SMT scheduler support improves the CPU scheduler's decision making
  409. when dealing with POWER5 cpus at a cost of slightly increased
  410. overhead in some places. If unsure say N here.
  411. config PROC_DEVICETREE
  412. bool "Support for device tree in /proc"
  413. depends on PROC_FS
  414. help
  415. This option adds a device-tree directory under /proc which contains
  416. an image of the device tree that the kernel copies from Open
  417. Firmware or other boot firmware. If unsure, say Y here.
  418. config CMDLINE_BOOL
  419. bool "Default bootloader kernel arguments"
  420. config CMDLINE
  421. string "Initial kernel command string"
  422. depends on CMDLINE_BOOL
  423. default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
  424. help
  425. On some platforms, there is currently no way for the boot loader to
  426. pass arguments to the kernel. For these platforms, you can supply
  427. some command-line options at build time by entering them here. In
  428. most cases you will need to specify the root device here.
  429. config EXTRA_TARGETS
  430. string "Additional default image types"
  431. help
  432. List additional targets to be built by the bootwrapper here (separated
  433. by spaces). This is useful for targets that depend of device tree
  434. files in the .dts directory.
  435. Targets in this list will be build as part of the default build
  436. target, or when the user does a 'make zImage' or a
  437. 'make zImage.initrd'.
  438. If unsure, leave blank
  439. if !44x || BROKEN
  440. config ARCH_WANTS_FREEZER_CONTROL
  441. def_bool y
  442. depends on ADB_PMU
  443. source kernel/power/Kconfig
  444. endif
  445. config SECCOMP
  446. bool "Enable seccomp to safely compute untrusted bytecode"
  447. depends on PROC_FS
  448. default y
  449. help
  450. This kernel feature is useful for number crunching applications
  451. that may need to compute untrusted bytecode during their
  452. execution. By using pipes or other transports made available to
  453. the process as file descriptors supporting the read/write
  454. syscalls, it's possible to isolate those applications in
  455. their own address space using seccomp. Once seccomp is
  456. enabled via /proc/<pid>/seccomp, it cannot be disabled
  457. and the task is only allowed to execute a few safe syscalls
  458. defined by each seccomp mode.
  459. If unsure, say Y. Only embedded should say N here.
  460. endmenu
  461. config ISA_DMA_API
  462. bool
  463. default !PPC_ISERIES || PCI
  464. menu "Bus options"
  465. config ISA
  466. bool "Support for ISA-bus hardware"
  467. depends on PPC_PREP || PPC_CHRP
  468. select PPC_I8259
  469. help
  470. Find out whether you have ISA slots on your motherboard. ISA is the
  471. name of a bus system, i.e. the way the CPU talks to the other stuff
  472. inside your box. If you have an Apple machine, say N here; if you
  473. have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
  474. you have an embedded board, consult your board documentation.
  475. config ZONE_DMA
  476. bool
  477. default y
  478. config GENERIC_ISA_DMA
  479. bool
  480. depends on PPC64 || POWER4 || 6xx && !CPM2
  481. default y
  482. config PPC_INDIRECT_PCI
  483. bool
  484. depends on PCI
  485. default y if 40x || 44x
  486. default n
  487. config EISA
  488. bool
  489. config SBUS
  490. bool
  491. config FSL_SOC
  492. bool
  493. config FSL_PCI
  494. bool
  495. select PPC_INDIRECT_PCI
  496. select PCI_QUIRKS
  497. config 4xx_SOC
  498. bool
  499. config FSL_LBC
  500. bool
  501. help
  502. Freescale Localbus support
  503. config FSL_GTM
  504. bool
  505. depends on PPC_83xx || QUICC_ENGINE || CPM2
  506. help
  507. Freescale General-purpose Timers support
  508. # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
  509. config MCA
  510. bool
  511. # Platforms that what PCI turned unconditionally just do select PCI
  512. # in their config node. Platforms that want to choose at config
  513. # time should select PPC_PCI_CHOICE
  514. config PPC_PCI_CHOICE
  515. bool
  516. config PCI
  517. bool "PCI support" if PPC_PCI_CHOICE
  518. default y if !40x && !CPM2 && !8xx && !PPC_83xx \
  519. && !PPC_85xx && !PPC_86xx
  520. default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
  521. default PCI_QSPAN if !4xx && !CPM2 && 8xx
  522. select ARCH_SUPPORTS_MSI
  523. help
  524. Find out whether your system includes a PCI bus. PCI is the name of
  525. a bus system, i.e. the way the CPU talks to the other stuff inside
  526. your box. If you say Y here, the kernel will include drivers and
  527. infrastructure code to support PCI bus devices.
  528. config PCI_DOMAINS
  529. def_bool PCI
  530. config PCI_SYSCALL
  531. def_bool PCI
  532. config PCI_QSPAN
  533. bool "QSpan PCI"
  534. depends on !4xx && !CPM2 && 8xx
  535. select PPC_I8259
  536. help
  537. Say Y here if you have a system based on a Motorola 8xx-series
  538. embedded processor with a QSPAN PCI interface, otherwise say N.
  539. config PCI_8260
  540. bool
  541. depends on PCI && 8260
  542. select PPC_INDIRECT_PCI
  543. default y
  544. config 8260_PCI9
  545. bool "Enable workaround for MPC826x erratum PCI 9"
  546. depends on PCI_8260 && !8272
  547. default y
  548. choice
  549. prompt "IDMA channel for PCI 9 workaround"
  550. depends on 8260_PCI9
  551. config 8260_PCI9_IDMA1
  552. bool "IDMA1"
  553. config 8260_PCI9_IDMA2
  554. bool "IDMA2"
  555. config 8260_PCI9_IDMA3
  556. bool "IDMA3"
  557. config 8260_PCI9_IDMA4
  558. bool "IDMA4"
  559. endchoice
  560. source "drivers/pci/pcie/Kconfig"
  561. source "drivers/pci/Kconfig"
  562. source "drivers/pcmcia/Kconfig"
  563. source "drivers/pci/hotplug/Kconfig"
  564. config HAS_RAPIDIO
  565. bool
  566. default n
  567. config RAPIDIO
  568. bool "RapidIO support"
  569. depends on HAS_RAPIDIO
  570. help
  571. If you say Y here, the kernel will include drivers and
  572. infrastructure code to support RapidIO interconnect devices.
  573. source "drivers/rapidio/Kconfig"
  574. endmenu
  575. menu "Advanced setup"
  576. depends on PPC32
  577. config ADVANCED_OPTIONS
  578. bool "Prompt for advanced kernel configuration options"
  579. help
  580. This option will enable prompting for a variety of advanced kernel
  581. configuration options. These options can cause the kernel to not
  582. work if they are set incorrectly, but can be used to optimize certain
  583. aspects of kernel memory management.
  584. Unless you know what you are doing, say N here.
  585. comment "Default settings for advanced configuration options are used"
  586. depends on !ADVANCED_OPTIONS
  587. config LOWMEM_SIZE_BOOL
  588. bool "Set maximum low memory"
  589. depends on ADVANCED_OPTIONS
  590. help
  591. This option allows you to set the maximum amount of memory which
  592. will be used as "low memory", that is, memory which the kernel can
  593. access directly, without having to set up a kernel virtual mapping.
  594. This can be useful in optimizing the layout of kernel virtual
  595. memory.
  596. Say N here unless you know what you are doing.
  597. config LOWMEM_SIZE
  598. hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
  599. default "0x30000000"
  600. config LOWMEM_CAM_NUM_BOOL
  601. bool "Set number of CAMs to use to map low memory"
  602. depends on ADVANCED_OPTIONS && FSL_BOOKE
  603. help
  604. This option allows you to set the maximum number of CAM slots that
  605. will be used to map low memory. There are a limited number of slots
  606. available and even more limited number that will fit in the L1 MMU.
  607. However, using more entries will allow mapping more low memory. This
  608. can be useful in optimizing the layout of kernel virtual memory.
  609. Say N here unless you know what you are doing.
  610. config LOWMEM_CAM_NUM
  611. int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
  612. default 3
  613. config RELOCATABLE
  614. bool "Build a relocatable kernel (EXPERIMENTAL)"
  615. depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  616. help
  617. This builds a kernel image that is capable of running at the
  618. location the kernel is loaded at (some alignment restrictions may
  619. exist).
  620. One use is for the kexec on panic case where the recovery kernel
  621. must live at a different physical address than the primary
  622. kernel.
  623. Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
  624. it has been loaded at and the compile time physical addresses
  625. CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
  626. setting can still be useful to bootwrappers that need to know the
  627. load location of the kernel (eg. u-boot/mkimage).
  628. config PAGE_OFFSET_BOOL
  629. bool "Set custom page offset address"
  630. depends on ADVANCED_OPTIONS
  631. help
  632. This option allows you to set the kernel virtual address at which
  633. the kernel will map low memory. This can be useful in optimizing
  634. the virtual memory layout of the system.
  635. Say N here unless you know what you are doing.
  636. config PAGE_OFFSET
  637. hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
  638. default "0xc0000000"
  639. config KERNEL_START_BOOL
  640. bool "Set custom kernel base address"
  641. depends on ADVANCED_OPTIONS
  642. help
  643. This option allows you to set the kernel virtual address at which
  644. the kernel will be loaded. Normally this should match PAGE_OFFSET
  645. however there are times (like kdump) that one might not want them
  646. to be the same.
  647. Say N here unless you know what you are doing.
  648. config KERNEL_START
  649. hex "Virtual address of kernel base" if KERNEL_START_BOOL
  650. default PAGE_OFFSET if PAGE_OFFSET_BOOL
  651. default "0xc2000000" if CRASH_DUMP
  652. default "0xc0000000"
  653. config PHYSICAL_START_BOOL
  654. bool "Set physical address where the kernel is loaded"
  655. depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  656. help
  657. This gives the physical address where the kernel is loaded.
  658. Say N here unless you know what you are doing.
  659. config PHYSICAL_START
  660. hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
  661. default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
  662. default "0x00000000"
  663. config PHYSICAL_ALIGN
  664. hex
  665. default "0x04000000" if FSL_BOOKE
  666. help
  667. This value puts the alignment restrictions on physical address
  668. where kernel is loaded and run from. Kernel is compiled for an
  669. address which meets above alignment restriction.
  670. config TASK_SIZE_BOOL
  671. bool "Set custom user task size"
  672. depends on ADVANCED_OPTIONS
  673. help
  674. This option allows you to set the amount of virtual address space
  675. allocated to user tasks. This can be useful in optimizing the
  676. virtual memory layout of the system.
  677. Say N here unless you know what you are doing.
  678. config TASK_SIZE
  679. hex "Size of user task space" if TASK_SIZE_BOOL
  680. default "0x80000000" if PPC_PREP || PPC_8xx
  681. default "0xc0000000"
  682. config CONSISTENT_START_BOOL
  683. bool "Set custom consistent memory pool address"
  684. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  685. help
  686. This option allows you to set the base virtual address
  687. of the consistent memory pool. This pool of virtual
  688. memory is used to make consistent memory allocations.
  689. config CONSISTENT_START
  690. hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
  691. default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
  692. default "0xff100000" if NOT_COHERENT_CACHE
  693. config CONSISTENT_SIZE_BOOL
  694. bool "Set custom consistent memory pool size"
  695. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  696. help
  697. This option allows you to set the size of the
  698. consistent memory pool. This pool of virtual memory
  699. is used to make consistent memory allocations.
  700. config CONSISTENT_SIZE
  701. hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
  702. default "0x00200000" if NOT_COHERENT_CACHE
  703. config PIN_TLB
  704. bool "Pinned Kernel TLBs (860 ONLY)"
  705. depends on ADVANCED_OPTIONS && 8xx
  706. endmenu
  707. if PPC64
  708. config RELOCATABLE
  709. bool "Build a relocatable kernel"
  710. help
  711. This builds a kernel image that is capable of running anywhere
  712. in the RMA (real memory area) at any 16k-aligned base address.
  713. The kernel is linked as a position-independent executable (PIE)
  714. and contains dynamic relocations which are processed early
  715. in the bootup process.
  716. One use is for the kexec on panic case where the recovery kernel
  717. must live at a different physical address than the primary
  718. kernel.
  719. config PAGE_OFFSET
  720. hex
  721. default "0xc000000000000000"
  722. config KERNEL_START
  723. hex
  724. default "0xc000000000000000"
  725. config PHYSICAL_START
  726. hex
  727. default "0x00000000"
  728. endif
  729. source "net/Kconfig"
  730. source "drivers/Kconfig"
  731. source "fs/Kconfig"
  732. source "arch/powerpc/sysdev/qe_lib/Kconfig"
  733. source "lib/Kconfig"
  734. source "arch/powerpc/Kconfig.debug"
  735. source "security/Kconfig"
  736. config KEYS_COMPAT
  737. bool
  738. depends on COMPAT && KEYS
  739. default y
  740. source "crypto/Kconfig"
  741. config PPC_CLOCK
  742. bool
  743. default n
  744. select HAVE_CLK
  745. config PPC_LIB_RHEAP
  746. bool
  747. source "arch/powerpc/kvm/Kconfig"