1# For a description of the syntax of this configuration file, 2# see Documentation/kbuild/kconfig-language.txt. 3# 4 5mainmenu "Linux/SPARC Kernel Configuration" 6 7config 64BIT 8 bool "64-bit kernel" if ARCH = "sparc" 9 default ARCH = "sparc64" 10 help 11 SPARC is a family of RISC microprocessors designed and marketed by 12 Sun Microsystems, incorporated. They are very widely found in Sun 13 workstations and clones. 14 15 Say yes to build a 64-bit kernel - formerly known as sparc64 16 Say no to build a 32-bit kernel - formerly known as sparc 17 18config SPARC 19 bool 20 default y 21 select HAVE_IDE 22 select HAVE_OPROFILE 23 select HAVE_ARCH_KGDB if !SMP || SPARC64 24 select HAVE_ARCH_TRACEHOOK 25 select ARCH_WANT_OPTIONAL_GPIOLIB 26 select RTC_CLASS 27 select RTC_DRV_M48T59 28 select HAVE_PERF_EVENTS 29 select HAVE_DMA_ATTRS 30 select HAVE_DMA_API_DEBUG 31 32config SPARC32 33 def_bool !64BIT 34 35config SPARC64 36 def_bool 64BIT 37 select ARCH_SUPPORTS_MSI 38 select HAVE_FUNCTION_TRACER 39 select HAVE_KRETPROBES 40 select HAVE_KPROBES 41 select HAVE_LMB 42 select HAVE_SYSCALL_WRAPPERS 43 select HAVE_DYNAMIC_FTRACE 44 select HAVE_FTRACE_MCOUNT_RECORD 45 select USE_GENERIC_SMP_HELPERS if SMP 46 select RTC_DRV_CMOS 47 select RTC_DRV_BQ4802 48 select RTC_DRV_SUN4V 49 select RTC_DRV_STARFIRE 50 select HAVE_PERF_EVENTS 51 52config ARCH_DEFCONFIG 53 string 54 default "arch/sparc/configs/sparc32_defconfig" if SPARC32 55 default "arch/sparc/configs/sparc64_defconfig" if SPARC64 56 57# CONFIG_BITS can be used at source level to get 32/64 bits 58config BITS 59 int 60 default 32 if SPARC32 61 default 64 if SPARC64 62 63config GENERIC_TIME 64 bool 65 default y if SPARC64 66 67config GENERIC_CMOS_UPDATE 68 bool 69 default y if SPARC64 70 71config GENERIC_CLOCKEVENTS 72 bool 73 default y if SPARC64 74 75config IOMMU_HELPER 76 bool 77 default y if SPARC64 78 79config QUICKLIST 80 bool 81 default y if SPARC64 82 83config STACKTRACE_SUPPORT 84 bool 85 default y if SPARC64 86 87config LOCKDEP_SUPPORT 88 bool 89 default y if SPARC64 90 91config HAVE_LATENCYTOP_SUPPORT 92 bool 93 default y if SPARC64 94 95config AUDIT_ARCH 96 bool 97 default y 98 99config HAVE_SETUP_PER_CPU_AREA 100 def_bool y if SPARC64 101 102config NEED_PER_CPU_EMBED_FIRST_CHUNK 103 def_bool y if SPARC64 104 105config NEED_PER_CPU_PAGE_FIRST_CHUNK 106 def_bool y if SPARC64 107 108config GENERIC_HARDIRQS_NO__DO_IRQ 109 bool 110 def_bool y if SPARC64 111 112config MMU 113 bool 114 default y 115 116config HIGHMEM 117 bool 118 default y if SPARC32 119 120config ZONE_DMA 121 bool 122 default y if SPARC32 123 124config GENERIC_ISA_DMA 125 bool 126 default y if SPARC32 127 128config GENERIC_GPIO 129 bool 130 help 131 Generic GPIO API support 132 133config ARCH_NO_VIRT_TO_BUS 134 def_bool y 135 136config OF 137 def_bool y 138 139config ARCH_SUPPORTS_DEBUG_PAGEALLOC 140 def_bool y if SPARC64 141 142source "init/Kconfig" 143 144source "kernel/Kconfig.freezer" 145 146menu "Processor type and features" 147 148config SMP 149 bool "Symmetric multi-processing support (does not work on sun4/sun4c)" 150 ---help--- 151 This enables support for systems with more than one CPU. If you have 152 a system with only one CPU, say N. If you have a system with more 153 than one CPU, say Y. 154 155 If you say N here, the kernel will run on single and multiprocessor 156 machines, but will use only one CPU of a multiprocessor machine. If 157 you say Y here, the kernel will run on many, but not all, 158 singleprocessor machines. On a singleprocessor machine, the kernel 159 will run faster if you say N here. 160 161 People using multiprocessor machines who say Y here should also say 162 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 163 Management" code will be disabled if you say Y here. 164 165 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 166 available at <http://www.tldp.org/docs.html#howto>. 167 168 If you don't know what to do here, say N. 169 170config NR_CPUS 171 int "Maximum number of CPUs" 172 depends on SMP 173 range 2 32 if SPARC32 174 range 2 1024 if SPARC64 175 default 32 if SPARC32 176 default 64 if SPARC64 177 178source kernel/Kconfig.hz 179 180config RWSEM_GENERIC_SPINLOCK 181 bool 182 default y if SPARC32 183 184config RWSEM_XCHGADD_ALGORITHM 185 bool 186 default y if SPARC64 187 188config GENERIC_FIND_NEXT_BIT 189 bool 190 default y 191 192config GENERIC_HWEIGHT 193 bool 194 default y if !ULTRA_HAS_POPULATION_COUNT 195 196config GENERIC_CALIBRATE_DELAY 197 bool 198 default y 199 200config ARCH_MAY_HAVE_PC_FDC 201 bool 202 default y 203 204config EMULATED_CMPXCHG 205 bool 206 default y if SPARC32 207 help 208 Sparc32 does not have a CAS instruction like sparc64. cmpxchg() 209 is emulated, and therefore it is not completely atomic. 210 211# Makefile helpers 212config SPARC32_SMP 213 bool 214 default y 215 depends on SPARC32 && SMP 216 217config SPARC64_SMP 218 bool 219 default y 220 depends on SPARC64 && SMP 221 222choice 223 prompt "Kernel page size" if SPARC64 224 default SPARC64_PAGE_SIZE_8KB 225 226config SPARC64_PAGE_SIZE_8KB 227 bool "8KB" 228 help 229 This lets you select the page size of the kernel. 230 231 8KB and 64KB work quite well, since SPARC ELF sections 232 provide for up to 64KB alignment. 233 234 If you don't know what to do, choose 8KB. 235 236config SPARC64_PAGE_SIZE_64KB 237 bool "64KB" 238 239endchoice 240 241config SECCOMP 242 bool "Enable seccomp to safely compute untrusted bytecode" 243 depends on SPARC64 && PROC_FS 244 default y 245 help 246 This kernel feature is useful for number crunching applications 247 that may need to compute untrusted bytecode during their 248 execution. By using pipes or other transports made available to 249 the process as file descriptors supporting the read/write 250 syscalls, it's possible to isolate those applications in 251 their own address space using seccomp. Once seccomp is 252 enabled via /proc/<pid>/seccomp, it cannot be disabled 253 and the task is only allowed to execute a few safe syscalls 254 defined by each seccomp mode. 255 256 If unsure, say Y. Only embedded should say N here. 257 258config HOTPLUG_CPU 259 bool "Support for hot-pluggable CPUs" 260 depends on SPARC64 && SMP 261 select HOTPLUG 262 help 263 Say Y here to experiment with turning CPUs off and on. CPUs 264 can be controlled through /sys/devices/system/cpu/cpu#. 265 Say N if you want to disable CPU hotplug. 266 267config GENERIC_HARDIRQS 268 bool 269 default y if SPARC64 270 271source "kernel/time/Kconfig" 272 273if SPARC64 274source "drivers/cpufreq/Kconfig" 275 276config US3_FREQ 277 tristate "UltraSPARC-III CPU Frequency driver" 278 depends on CPU_FREQ 279 select CPU_FREQ_TABLE 280 help 281 This adds the CPUFreq driver for UltraSPARC-III processors. 282 283 For details, take a look at <file:Documentation/cpu-freq>. 284 285 If in doubt, say N. 286 287config US2E_FREQ 288 tristate "UltraSPARC-IIe CPU Frequency driver" 289 depends on CPU_FREQ 290 select CPU_FREQ_TABLE 291 help 292 This adds the CPUFreq driver for UltraSPARC-IIe processors. 293 294 For details, take a look at <file:Documentation/cpu-freq>. 295 296 If in doubt, say N. 297 298endif 299 300config US3_MC 301 tristate "UltraSPARC-III Memory Controller driver" 302 depends on SPARC64 303 default y 304 help 305 This adds a driver for the UltraSPARC-III memory controller. 306 Loading this driver allows exact mnemonic strings to be 307 printed in the event of a memory error, so that the faulty DIMM 308 on the motherboard can be matched to the error. 309 310 If in doubt, say Y, as this information can be very useful. 311 312# Global things across all Sun machines. 313config GENERIC_LOCKBREAK 314 bool 315 default y 316 depends on SPARC64 && SMP && PREEMPT 317 318choice 319 prompt "SPARC64 Huge TLB Page Size" 320 depends on SPARC64 && HUGETLB_PAGE 321 default HUGETLB_PAGE_SIZE_4MB 322 323config HUGETLB_PAGE_SIZE_4MB 324 bool "4MB" 325 326config HUGETLB_PAGE_SIZE_512K 327 bool "512K" 328 329config HUGETLB_PAGE_SIZE_64K 330 depends on !SPARC64_PAGE_SIZE_64KB 331 bool "64K" 332 333endchoice 334 335config NUMA 336 bool "NUMA support" 337 depends on SPARC64 && SMP 338 339config NODES_SHIFT 340 int 341 default "4" 342 depends on NEED_MULTIPLE_NODES 343 344# Some NUMA nodes have memory ranges that span 345# other nodes. Even though a pfn is valid and 346# between a node's start and end pfns, it may not 347# reside on that node. See memmap_init_zone() 348# for details. 349config NODES_SPAN_OTHER_NODES 350 def_bool y 351 depends on NEED_MULTIPLE_NODES 352 353config ARCH_POPULATES_NODE_MAP 354 def_bool y if SPARC64 355 356config ARCH_SELECT_MEMORY_MODEL 357 def_bool y if SPARC64 358 359config ARCH_SPARSEMEM_ENABLE 360 def_bool y if SPARC64 361 select SPARSEMEM_VMEMMAP_ENABLE 362 363config ARCH_SPARSEMEM_DEFAULT 364 def_bool y if SPARC64 365 366source "mm/Kconfig" 367 368config SCHED_SMT 369 bool "SMT (Hyperthreading) scheduler support" 370 depends on SPARC64 && SMP 371 default y 372 help 373 SMT scheduler support improves the CPU scheduler's decision making 374 when dealing with SPARC cpus at a cost of slightly increased overhead 375 in some places. If unsure say N here. 376 377config SCHED_MC 378 bool "Multi-core scheduler support" 379 depends on SPARC64 && SMP 380 default y 381 help 382 Multi-core scheduler support improves the CPU scheduler's decision 383 making when dealing with multi-core CPU chips at a cost of slightly 384 increased overhead in some places. If unsure say N here. 385 386if SPARC64 387source "kernel/Kconfig.preempt" 388endif 389 390config CMDLINE_BOOL 391 bool "Default bootloader kernel arguments" 392 depends on SPARC64 393 394config CMDLINE 395 string "Initial kernel command string" 396 depends on CMDLINE_BOOL 397 default "console=ttyS0,9600 root=/dev/sda1" 398 help 399 Say Y here if you want to be able to pass default arguments to 400 the kernel. This will be overridden by the bootloader, if you 401 use one (such as SILO). This is most useful if you want to boot 402 a kernel from TFTP, and want default options to be available 403 with having them passed on the command line. 404 405 NOTE: This option WILL override the PROM bootargs setting! 406 407config SUN_PM 408 bool 409 default y if SPARC32 410 help 411 Enable power management and CPU standby features on supported 412 SPARC platforms. 413 414config SPARC_LED 415 tristate "Sun4m LED driver" 416 depends on SPARC32 417 help 418 This driver toggles the front-panel LED on sun4m systems 419 in a user-specifiable manner. Its state can be probed 420 by reading /proc/led and its blinking mode can be changed 421 via writes to /proc/led 422 423config SERIAL_CONSOLE 424 bool 425 depends on SPARC32 426 default y 427 ---help--- 428 If you say Y here, it will be possible to use a serial port as the 429 system console (the system console is the device which receives all 430 kernel messages and warnings and which allows logins in single user 431 mode). This could be useful if some terminal or printer is connected 432 to that serial port. 433 434 Even if you say Y here, the currently visible virtual console 435 (/dev/tty0) will still be used as the system console by default, but 436 you can alter that using a kernel command line option such as 437 "console=ttyS1". (Try "man bootparam" or see the documentation of 438 your boot loader (silo) about how to pass options to the kernel at 439 boot time.) 440 441 If you don't have a graphics card installed and you say Y here, the 442 kernel will automatically use the first serial line, /dev/ttyS0, as 443 system console. 444 445 If unsure, say N. 446 447config SPARC_LEON 448 bool "Sparc Leon processor family" 449 depends on SPARC32 450 ---help--- 451 If you say Y here if you are running on a SPARC-LEON processor. 452 The LEON processor is a synthesizable VHDL model of the 453 SPARC-v8 standard. LEON is part of the GRLIB collection of 454 IP cores that are distributed under GPL. GRLIB can be downloaded 455 from www.gaisler.com. You can download a sparc-linux cross-compilation 456 toolchain at www.gaisler.com. 457 458endmenu 459 460menu "Bus options (PCI etc.)" 461config SBUS 462 bool 463 default y 464 465config SBUSCHAR 466 bool 467 default y 468 469config SUN_LDOMS 470 bool "Sun Logical Domains support" 471 depends on SPARC64 472 help 473 Say Y here is you want to support virtual devices via 474 Logical Domains. 475 476config PCI 477 bool "Support for PCI and PS/2 keyboard/mouse" 478 help 479 Find out whether your system includes a PCI bus. PCI is the name of 480 a bus system, i.e. the way the CPU talks to the other stuff inside 481 your box. If you say Y here, the kernel will include drivers and 482 infrastructure code to support PCI bus devices. 483 484 CONFIG_PCI is needed for all JavaStation's (including MrCoffee), 485 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC. 486 All of these platforms are extremely obscure, so say N if unsure. 487 488config PCI_DOMAINS 489 def_bool PCI if SPARC64 490 491config PCI_SYSCALL 492 def_bool PCI 493 494source "drivers/pci/Kconfig" 495 496source "drivers/pcmcia/Kconfig" 497 498config SUN_OPENPROMFS 499 tristate "Openprom tree appears in /proc/openprom" 500 help 501 If you say Y, the OpenPROM device tree will be available as a 502 virtual file system, which you can mount to /proc/openprom by "mount 503 -t openpromfs none /proc/openprom". 504 505 To compile the /proc/openprom support as a module, choose M here: the 506 module will be called openpromfs. 507 508 Only choose N if you know in advance that you will not need to modify 509 OpenPROM settings on the running system. 510 511# Makefile helpers 512config SPARC32_PCI 513 bool 514 default y 515 depends on SPARC32 && PCI 516 517config SPARC64_PCI 518 bool 519 default y 520 depends on SPARC64 && PCI 521 522endmenu 523 524menu "Executable file formats" 525 526source "fs/Kconfig.binfmt" 527 528config COMPAT 529 bool 530 depends on SPARC64 531 default y 532 select COMPAT_BINFMT_ELF 533 534config SYSVIPC_COMPAT 535 bool 536 depends on COMPAT && SYSVIPC 537 default y 538 539endmenu 540 541source "net/Kconfig" 542 543source "drivers/Kconfig" 544 545source "drivers/sbus/char/Kconfig" 546 547source "fs/Kconfig" 548 549source "arch/sparc/Kconfig.debug" 550 551source "security/Kconfig" 552 553source "crypto/Kconfig" 554 555source "lib/Kconfig" 556