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 224choice 225 prompt "Kernel page size" if SPARC64 226 default SPARC64_PAGE_SIZE_8KB 227 228config SPARC64_PAGE_SIZE_8KB 229 bool "8KB" 230 help 231 This lets you select the page size of the kernel. 232 233 8KB and 64KB work quite well, since SPARC ELF sections 234 provide for up to 64KB alignment. 235 236 If you don't know what to do, choose 8KB. 237 238config SPARC64_PAGE_SIZE_64KB 239 bool "64KB" 240 241endchoice 242 243config SECCOMP 244 bool "Enable seccomp to safely compute untrusted bytecode" 245 depends on SPARC64 && PROC_FS 246 default y 247 help 248 This kernel feature is useful for number crunching applications 249 that may need to compute untrusted bytecode during their 250 execution. By using pipes or other transports made available to 251 the process as file descriptors supporting the read/write 252 syscalls, it's possible to isolate those applications in 253 their own address space using seccomp. Once seccomp is 254 enabled via /proc/<pid>/seccomp, it cannot be disabled 255 and the task is only allowed to execute a few safe syscalls 256 defined by each seccomp mode. 257 258 If unsure, say Y. Only embedded should say N here. 259 260config HOTPLUG_CPU 261 bool "Support for hot-pluggable CPUs" 262 depends on SPARC64 && SMP 263 select HOTPLUG 264 help 265 Say Y here to experiment with turning CPUs off and on. CPUs 266 can be controlled through /sys/devices/system/cpu/cpu#. 267 Say N if you want to disable CPU hotplug. 268 269config GENERIC_HARDIRQS 270 bool 271 default y if SPARC64 272 273source "kernel/time/Kconfig" 274 275if SPARC64 276source "drivers/cpufreq/Kconfig" 277 278config US3_FREQ 279 tristate "UltraSPARC-III CPU Frequency driver" 280 depends on CPU_FREQ 281 select CPU_FREQ_TABLE 282 help 283 This adds the CPUFreq driver for UltraSPARC-III processors. 284 285 For details, take a look at <file:Documentation/cpu-freq>. 286 287 If in doubt, say N. 288 289config US2E_FREQ 290 tristate "UltraSPARC-IIe CPU Frequency driver" 291 depends on CPU_FREQ 292 select CPU_FREQ_TABLE 293 help 294 This adds the CPUFreq driver for UltraSPARC-IIe processors. 295 296 For details, take a look at <file:Documentation/cpu-freq>. 297 298 If in doubt, say N. 299 300endif 301 302config US3_MC 303 tristate "UltraSPARC-III Memory Controller driver" 304 depends on SPARC64 305 default y 306 help 307 This adds a driver for the UltraSPARC-III memory controller. 308 Loading this driver allows exact mnemonic strings to be 309 printed in the event of a memory error, so that the faulty DIMM 310 on the motherboard can be matched to the error. 311 312 If in doubt, say Y, as this information can be very useful. 313 314# Global things across all Sun machines. 315config GENERIC_LOCKBREAK 316 bool 317 default y 318 depends on SPARC64 && SMP && PREEMPT 319 320choice 321 prompt "SPARC64 Huge TLB Page Size" 322 depends on SPARC64 && HUGETLB_PAGE 323 default HUGETLB_PAGE_SIZE_4MB 324 325config HUGETLB_PAGE_SIZE_4MB 326 bool "4MB" 327 328config HUGETLB_PAGE_SIZE_512K 329 bool "512K" 330 331config HUGETLB_PAGE_SIZE_64K 332 depends on !SPARC64_PAGE_SIZE_64KB 333 bool "64K" 334 335endchoice 336 337config NUMA 338 bool "NUMA support" 339 depends on SPARC64 && SMP 340 341config NODES_SHIFT 342 int 343 default "4" 344 depends on NEED_MULTIPLE_NODES 345 346# Some NUMA nodes have memory ranges that span 347# other nodes. Even though a pfn is valid and 348# between a node's start and end pfns, it may not 349# reside on that node. See memmap_init_zone() 350# for details. 351config NODES_SPAN_OTHER_NODES 352 def_bool y 353 depends on NEED_MULTIPLE_NODES 354 355config ARCH_POPULATES_NODE_MAP 356 def_bool y if SPARC64 357 358config ARCH_SELECT_MEMORY_MODEL 359 def_bool y if SPARC64 360 361config ARCH_SPARSEMEM_ENABLE 362 def_bool y if SPARC64 363 select SPARSEMEM_VMEMMAP_ENABLE 364 365config ARCH_SPARSEMEM_DEFAULT 366 def_bool y if SPARC64 367 368source "mm/Kconfig" 369 370config SCHED_SMT 371 bool "SMT (Hyperthreading) scheduler support" 372 depends on SPARC64 && SMP 373 default y 374 help 375 SMT scheduler support improves the CPU scheduler's decision making 376 when dealing with SPARC cpus at a cost of slightly increased overhead 377 in some places. If unsure say N here. 378 379config SCHED_MC 380 bool "Multi-core scheduler support" 381 depends on SPARC64 && SMP 382 default y 383 help 384 Multi-core scheduler support improves the CPU scheduler's decision 385 making when dealing with multi-core CPU chips at a cost of slightly 386 increased overhead in some places. If unsure say N here. 387 388if SPARC64 389source "kernel/Kconfig.preempt" 390endif 391 392config CMDLINE_BOOL 393 bool "Default bootloader kernel arguments" 394 depends on SPARC64 395 396config CMDLINE 397 string "Initial kernel command string" 398 depends on CMDLINE_BOOL 399 default "console=ttyS0,9600 root=/dev/sda1" 400 help 401 Say Y here if you want to be able to pass default arguments to 402 the kernel. This will be overridden by the bootloader, if you 403 use one (such as SILO). This is most useful if you want to boot 404 a kernel from TFTP, and want default options to be available 405 with having them passed on the command line. 406 407 NOTE: This option WILL override the PROM bootargs setting! 408 409config SUN_PM 410 bool 411 default y if SPARC32 412 help 413 Enable power management and CPU standby features on supported 414 SPARC platforms. 415 416config SPARC_LED 417 tristate "Sun4m LED driver" 418 depends on SPARC32 419 help 420 This driver toggles the front-panel LED on sun4m systems 421 in a user-specifiable manner. Its state can be probed 422 by reading /proc/led and its blinking mode can be changed 423 via writes to /proc/led 424 425config SERIAL_CONSOLE 426 bool 427 depends on SPARC32 428 default y 429 ---help--- 430 If you say Y here, it will be possible to use a serial port as the 431 system console (the system console is the device which receives all 432 kernel messages and warnings and which allows logins in single user 433 mode). This could be useful if some terminal or printer is connected 434 to that serial port. 435 436 Even if you say Y here, the currently visible virtual console 437 (/dev/tty0) will still be used as the system console by default, but 438 you can alter that using a kernel command line option such as 439 "console=ttyS1". (Try "man bootparam" or see the documentation of 440 your boot loader (silo) about how to pass options to the kernel at 441 boot time.) 442 443 If you don't have a graphics card installed and you say Y here, the 444 kernel will automatically use the first serial line, /dev/ttyS0, as 445 system console. 446 447 If unsure, say N. 448 449config SPARC_LEON 450 bool "Sparc Leon processor family" 451 depends on SPARC32 452 ---help--- 453 If you say Y here if you are running on a SPARC-LEON processor. 454 The LEON processor is a synthesizable VHDL model of the 455 SPARC-v8 standard. LEON is part of the GRLIB collection of 456 IP cores that are distributed under GPL. GRLIB can be downloaded 457 from www.gaisler.com. You can download a sparc-linux cross-compilation 458 toolchain at www.gaisler.com. 459 460endmenu 461 462menu "Bus options (PCI etc.)" 463config SBUS 464 bool 465 default y 466 467config SBUSCHAR 468 bool 469 default y 470 471config SUN_LDOMS 472 bool "Sun Logical Domains support" 473 depends on SPARC64 474 help 475 Say Y here is you want to support virtual devices via 476 Logical Domains. 477 478config PCI 479 bool "Support for PCI and PS/2 keyboard/mouse" 480 help 481 Find out whether your system includes a PCI bus. PCI is the name of 482 a bus system, i.e. the way the CPU talks to the other stuff inside 483 your box. If you say Y here, the kernel will include drivers and 484 infrastructure code to support PCI bus devices. 485 486 CONFIG_PCI is needed for all JavaStation's (including MrCoffee), 487 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC. 488 All of these platforms are extremely obscure, so say N if unsure. 489 490config PCI_DOMAINS 491 def_bool PCI if SPARC64 492 493config PCI_SYSCALL 494 def_bool PCI 495 496source "drivers/pci/Kconfig" 497 498source "drivers/pcmcia/Kconfig" 499 500config SUN_OPENPROMFS 501 tristate "Openprom tree appears in /proc/openprom" 502 help 503 If you say Y, the OpenPROM device tree will be available as a 504 virtual file system, which you can mount to /proc/openprom by "mount 505 -t openpromfs none /proc/openprom". 506 507 To compile the /proc/openprom support as a module, choose M here: the 508 module will be called openpromfs. 509 510 Only choose N if you know in advance that you will not need to modify 511 OpenPROM settings on the running system. 512 513# Makefile helpers 514config SPARC32_PCI 515 bool 516 default y 517 depends on SPARC32 && PCI 518 519config SPARC64_PCI 520 bool 521 default y 522 depends on SPARC64 && PCI 523 524endmenu 525 526menu "Executable file formats" 527 528source "fs/Kconfig.binfmt" 529 530config COMPAT 531 bool 532 depends on SPARC64 533 default y 534 select COMPAT_BINFMT_ELF 535 536config SYSVIPC_COMPAT 537 bool 538 depends on COMPAT && SYSVIPC 539 default y 540 541endmenu 542 543source "net/Kconfig" 544 545source "drivers/Kconfig" 546 547source "drivers/sbus/char/Kconfig" 548 549source "fs/Kconfig" 550 551source "arch/sparc/Kconfig.debug" 552 553source "security/Kconfig" 554 555source "crypto/Kconfig" 556 557source "lib/Kconfig" 558