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 PERF_USE_VMALLOC 30 select HAVE_DMA_ATTRS 31 select HAVE_DMA_API_DEBUG 32 33config SPARC32 34 def_bool !64BIT 35 36config SPARC64 37 def_bool 64BIT 38 select ARCH_SUPPORTS_MSI 39 select HAVE_FUNCTION_TRACER 40 select HAVE_KRETPROBES 41 select HAVE_KPROBES 42 select HAVE_LMB 43 select HAVE_SYSCALL_WRAPPERS 44 select HAVE_DYNAMIC_FTRACE 45 select HAVE_FTRACE_MCOUNT_RECORD 46 select USE_GENERIC_SMP_HELPERS if SMP 47 select RTC_DRV_CMOS 48 select RTC_DRV_BQ4802 49 select RTC_DRV_SUN4V 50 select RTC_DRV_STARFIRE 51 select HAVE_PERF_EVENTS 52 select PERF_USE_VMALLOC 53 54config ARCH_DEFCONFIG 55 string 56 default "arch/sparc/configs/sparc32_defconfig" if SPARC32 57 default "arch/sparc/configs/sparc64_defconfig" if SPARC64 58 59# CONFIG_BITS can be used at source level to get 32/64 bits 60config BITS 61 int 62 default 32 if SPARC32 63 default 64 if SPARC64 64 65config GENERIC_TIME 66 bool 67 default y if SPARC64 68 69config GENERIC_CMOS_UPDATE 70 bool 71 default y if SPARC64 72 73config GENERIC_CLOCKEVENTS 74 bool 75 default y if SPARC64 76 77config IOMMU_HELPER 78 bool 79 default y if SPARC64 80 81config QUICKLIST 82 bool 83 default y if SPARC64 84 85config STACKTRACE_SUPPORT 86 bool 87 default y if SPARC64 88 89config LOCKDEP_SUPPORT 90 bool 91 default y if SPARC64 92 93config HAVE_LATENCYTOP_SUPPORT 94 bool 95 default y if SPARC64 96 97config AUDIT_ARCH 98 bool 99 default y 100 101config HAVE_SETUP_PER_CPU_AREA 102 def_bool y if SPARC64 103 104config NEED_PER_CPU_EMBED_FIRST_CHUNK 105 def_bool y if SPARC64 106 107config NEED_PER_CPU_PAGE_FIRST_CHUNK 108 def_bool y if SPARC64 109 110config GENERIC_HARDIRQS_NO__DO_IRQ 111 bool 112 def_bool y if SPARC64 113 114config MMU 115 bool 116 default y 117 118config HIGHMEM 119 bool 120 default y if SPARC32 121 122config ZONE_DMA 123 bool 124 default y if SPARC32 125 126config GENERIC_ISA_DMA 127 bool 128 default y if SPARC32 129 130config GENERIC_GPIO 131 bool 132 help 133 Generic GPIO API support 134 135config ARCH_NO_VIRT_TO_BUS 136 def_bool y 137 138config OF 139 def_bool y 140 141config ARCH_SUPPORTS_DEBUG_PAGEALLOC 142 def_bool y if SPARC64 143 144source "init/Kconfig" 145 146source "kernel/Kconfig.freezer" 147 148menu "Processor type and features" 149 150config SMP 151 bool "Symmetric multi-processing support (does not work on sun4/sun4c)" 152 ---help--- 153 This enables support for systems with more than one CPU. If you have 154 a system with only one CPU, say N. If you have a system with more 155 than one CPU, say Y. 156 157 If you say N here, the kernel will run on single and multiprocessor 158 machines, but will use only one CPU of a multiprocessor machine. If 159 you say Y here, the kernel will run on many, but not all, 160 singleprocessor machines. On a singleprocessor machine, the kernel 161 will run faster if you say N here. 162 163 People using multiprocessor machines who say Y here should also say 164 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 165 Management" code will be disabled if you say Y here. 166 167 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 168 available at <http://www.tldp.org/docs.html#howto>. 169 170 If you don't know what to do here, say N. 171 172config NR_CPUS 173 int "Maximum number of CPUs" 174 depends on SMP 175 range 2 32 if SPARC32 176 range 2 1024 if SPARC64 177 default 32 if SPARC32 178 default 64 if SPARC64 179 180source kernel/Kconfig.hz 181 182config RWSEM_GENERIC_SPINLOCK 183 bool 184 default y if SPARC32 185 186config RWSEM_XCHGADD_ALGORITHM 187 bool 188 default y if SPARC64 189 190config GENERIC_FIND_NEXT_BIT 191 bool 192 default y 193 194config GENERIC_HWEIGHT 195 bool 196 default y if !ULTRA_HAS_POPULATION_COUNT 197 198config GENERIC_CALIBRATE_DELAY 199 bool 200 default y 201 202config ARCH_MAY_HAVE_PC_FDC 203 bool 204 default y 205 206config EMULATED_CMPXCHG 207 bool 208 default y if SPARC32 209 help 210 Sparc32 does not have a CAS instruction like sparc64. cmpxchg() 211 is emulated, and therefore it is not completely atomic. 212 213# Makefile helpers 214config SPARC32_SMP 215 bool 216 default y 217 depends on SPARC32 && SMP 218 219config SPARC64_SMP 220 bool 221 default y 222 depends on SPARC64 && SMP 223 224config EARLYFB 225 bool "Support for early boot text console" 226 default y 227 depends on SPARC64 228 help 229 Say Y here to enable a faster early framebuffer boot console. 230 231choice 232 prompt "Kernel page size" if SPARC64 233 default SPARC64_PAGE_SIZE_8KB 234 235config SPARC64_PAGE_SIZE_8KB 236 bool "8KB" 237 help 238 This lets you select the page size of the kernel. 239 240 8KB and 64KB work quite well, since SPARC ELF sections 241 provide for up to 64KB alignment. 242 243 If you don't know what to do, choose 8KB. 244 245config SPARC64_PAGE_SIZE_64KB 246 bool "64KB" 247 248endchoice 249 250config SECCOMP 251 bool "Enable seccomp to safely compute untrusted bytecode" 252 depends on SPARC64 && PROC_FS 253 default y 254 help 255 This kernel feature is useful for number crunching applications 256 that may need to compute untrusted bytecode during their 257 execution. By using pipes or other transports made available to 258 the process as file descriptors supporting the read/write 259 syscalls, it's possible to isolate those applications in 260 their own address space using seccomp. Once seccomp is 261 enabled via /proc/<pid>/seccomp, it cannot be disabled 262 and the task is only allowed to execute a few safe syscalls 263 defined by each seccomp mode. 264 265 If unsure, say Y. Only embedded should say N here. 266 267config HOTPLUG_CPU 268 bool "Support for hot-pluggable CPUs" 269 depends on SPARC64 && SMP 270 select HOTPLUG 271 help 272 Say Y here to experiment with turning CPUs off and on. CPUs 273 can be controlled through /sys/devices/system/cpu/cpu#. 274 Say N if you want to disable CPU hotplug. 275 276config GENERIC_HARDIRQS 277 bool 278 default y if SPARC64 279 280source "kernel/time/Kconfig" 281 282if SPARC64 283source "drivers/cpufreq/Kconfig" 284 285config US3_FREQ 286 tristate "UltraSPARC-III CPU Frequency driver" 287 depends on CPU_FREQ 288 select CPU_FREQ_TABLE 289 help 290 This adds the CPUFreq driver for UltraSPARC-III processors. 291 292 For details, take a look at <file:Documentation/cpu-freq>. 293 294 If in doubt, say N. 295 296config US2E_FREQ 297 tristate "UltraSPARC-IIe CPU Frequency driver" 298 depends on CPU_FREQ 299 select CPU_FREQ_TABLE 300 help 301 This adds the CPUFreq driver for UltraSPARC-IIe processors. 302 303 For details, take a look at <file:Documentation/cpu-freq>. 304 305 If in doubt, say N. 306 307endif 308 309config US3_MC 310 tristate "UltraSPARC-III Memory Controller driver" 311 depends on SPARC64 312 default y 313 help 314 This adds a driver for the UltraSPARC-III memory controller. 315 Loading this driver allows exact mnemonic strings to be 316 printed in the event of a memory error, so that the faulty DIMM 317 on the motherboard can be matched to the error. 318 319 If in doubt, say Y, as this information can be very useful. 320 321# Global things across all Sun machines. 322config GENERIC_LOCKBREAK 323 bool 324 default y 325 depends on SPARC64 && SMP && PREEMPT 326 327choice 328 prompt "SPARC64 Huge TLB Page Size" 329 depends on SPARC64 && HUGETLB_PAGE 330 default HUGETLB_PAGE_SIZE_4MB 331 332config HUGETLB_PAGE_SIZE_4MB 333 bool "4MB" 334 335config HUGETLB_PAGE_SIZE_512K 336 bool "512K" 337 338config HUGETLB_PAGE_SIZE_64K 339 depends on !SPARC64_PAGE_SIZE_64KB 340 bool "64K" 341 342endchoice 343 344config NUMA 345 bool "NUMA support" 346 depends on SPARC64 && SMP 347 348config NODES_SHIFT 349 int 350 default "4" 351 depends on NEED_MULTIPLE_NODES 352 353# Some NUMA nodes have memory ranges that span 354# other nodes. Even though a pfn is valid and 355# between a node's start and end pfns, it may not 356# reside on that node. See memmap_init_zone() 357# for details. 358config NODES_SPAN_OTHER_NODES 359 def_bool y 360 depends on NEED_MULTIPLE_NODES 361 362config ARCH_POPULATES_NODE_MAP 363 def_bool y if SPARC64 364 365config ARCH_SELECT_MEMORY_MODEL 366 def_bool y if SPARC64 367 368config ARCH_SPARSEMEM_ENABLE 369 def_bool y if SPARC64 370 select SPARSEMEM_VMEMMAP_ENABLE 371 372config ARCH_SPARSEMEM_DEFAULT 373 def_bool y if SPARC64 374 375source "mm/Kconfig" 376 377config SCHED_SMT 378 bool "SMT (Hyperthreading) scheduler support" 379 depends on SPARC64 && SMP 380 default y 381 help 382 SMT scheduler support improves the CPU scheduler's decision making 383 when dealing with SPARC cpus at a cost of slightly increased overhead 384 in some places. If unsure say N here. 385 386config SCHED_MC 387 bool "Multi-core scheduler support" 388 depends on SPARC64 && SMP 389 default y 390 help 391 Multi-core scheduler support improves the CPU scheduler's decision 392 making when dealing with multi-core CPU chips at a cost of slightly 393 increased overhead in some places. If unsure say N here. 394 395if SPARC64 396source "kernel/Kconfig.preempt" 397endif 398 399config CMDLINE_BOOL 400 bool "Default bootloader kernel arguments" 401 depends on SPARC64 402 403config CMDLINE 404 string "Initial kernel command string" 405 depends on CMDLINE_BOOL 406 default "console=ttyS0,9600 root=/dev/sda1" 407 help 408 Say Y here if you want to be able to pass default arguments to 409 the kernel. This will be overridden by the bootloader, if you 410 use one (such as SILO). This is most useful if you want to boot 411 a kernel from TFTP, and want default options to be available 412 with having them passed on the command line. 413 414 NOTE: This option WILL override the PROM bootargs setting! 415 416config SUN_PM 417 bool 418 default y if SPARC32 419 help 420 Enable power management and CPU standby features on supported 421 SPARC platforms. 422 423config SPARC_LED 424 tristate "Sun4m LED driver" 425 depends on SPARC32 426 help 427 This driver toggles the front-panel LED on sun4m systems 428 in a user-specifiable manner. Its state can be probed 429 by reading /proc/led and its blinking mode can be changed 430 via writes to /proc/led 431 432config SERIAL_CONSOLE 433 bool 434 depends on SPARC32 435 default y 436 ---help--- 437 If you say Y here, it will be possible to use a serial port as the 438 system console (the system console is the device which receives all 439 kernel messages and warnings and which allows logins in single user 440 mode). This could be useful if some terminal or printer is connected 441 to that serial port. 442 443 Even if you say Y here, the currently visible virtual console 444 (/dev/tty0) will still be used as the system console by default, but 445 you can alter that using a kernel command line option such as 446 "console=ttyS1". (Try "man bootparam" or see the documentation of 447 your boot loader (silo) about how to pass options to the kernel at 448 boot time.) 449 450 If you don't have a graphics card installed and you say Y here, the 451 kernel will automatically use the first serial line, /dev/ttyS0, as 452 system console. 453 454 If unsure, say N. 455 456config SPARC_LEON 457 bool "Sparc Leon processor family" 458 depends on SPARC32 459 ---help--- 460 If you say Y here if you are running on a SPARC-LEON processor. 461 The LEON processor is a synthesizable VHDL model of the 462 SPARC-v8 standard. LEON is part of the GRLIB collection of 463 IP cores that are distributed under GPL. GRLIB can be downloaded 464 from www.gaisler.com. You can download a sparc-linux cross-compilation 465 toolchain at www.gaisler.com. 466 467endmenu 468 469menu "Bus options (PCI etc.)" 470config SBUS 471 bool 472 default y 473 474config SBUSCHAR 475 bool 476 default y 477 478config SUN_LDOMS 479 bool "Sun Logical Domains support" 480 depends on SPARC64 481 help 482 Say Y here is you want to support virtual devices via 483 Logical Domains. 484 485config PCI 486 bool "Support for PCI and PS/2 keyboard/mouse" 487 help 488 Find out whether your system includes a PCI bus. PCI is the name of 489 a bus system, i.e. the way the CPU talks to the other stuff inside 490 your box. If you say Y here, the kernel will include drivers and 491 infrastructure code to support PCI bus devices. 492 493 CONFIG_PCI is needed for all JavaStation's (including MrCoffee), 494 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC. 495 All of these platforms are extremely obscure, so say N if unsure. 496 497config PCI_DOMAINS 498 def_bool PCI if SPARC64 499 500config PCI_SYSCALL 501 def_bool PCI 502 503source "drivers/pci/Kconfig" 504 505source "drivers/pcmcia/Kconfig" 506 507config SUN_OPENPROMFS 508 tristate "Openprom tree appears in /proc/openprom" 509 help 510 If you say Y, the OpenPROM device tree will be available as a 511 virtual file system, which you can mount to /proc/openprom by "mount 512 -t openpromfs none /proc/openprom". 513 514 To compile the /proc/openprom support as a module, choose M here: the 515 module will be called openpromfs. 516 517 Only choose N if you know in advance that you will not need to modify 518 OpenPROM settings on the running system. 519 520# Makefile helpers 521config SPARC32_PCI 522 bool 523 default y 524 depends on SPARC32 && PCI 525 526config SPARC64_PCI 527 bool 528 default y 529 depends on SPARC64 && PCI 530 531endmenu 532 533menu "Executable file formats" 534 535source "fs/Kconfig.binfmt" 536 537config COMPAT 538 bool 539 depends on SPARC64 540 default y 541 select COMPAT_BINFMT_ELF 542 543config SYSVIPC_COMPAT 544 bool 545 depends on COMPAT && SYSVIPC 546 default y 547 548endmenu 549 550source "net/Kconfig" 551 552source "drivers/Kconfig" 553 554source "drivers/sbus/char/Kconfig" 555 556source "fs/Kconfig" 557 558source "arch/sparc/Kconfig.debug" 559 560source "security/Kconfig" 561 562source "crypto/Kconfig" 563 564source "lib/Kconfig" 565