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 SPARC 8 bool 9 default y 10 select HAVE_IDE 11 select HAVE_OPROFILE 12 select HAVE_ARCH_KGDB if !SMP || SPARC64 13 select HAVE_ARCH_TRACEHOOK 14 select ARCH_WANT_OPTIONAL_GPIOLIB 15 select RTC_CLASS 16 select RTC_DRV_M48T59 17 18# Identify this as a Sparc32 build 19config SPARC32 20 bool 21 default y if ARCH = "sparc" 22 help 23 SPARC is a family of RISC microprocessors designed and marketed by 24 Sun Microsystems, incorporated. They are very widely found in Sun 25 workstations and clones. This port covers the original 32-bit SPARC; 26 it is old and stable and usually considered one of the "big three" 27 along with the Intel and Alpha ports. The UltraLinux project 28 maintains both the SPARC32 and SPARC64 ports; its web page is 29 available at <http://www.ultralinux.org/>. 30 31config SPARC64 32 bool 33 default y if ARCH = "sparc64" 34 select HAVE_FUNCTION_TRACER 35 select HAVE_KRETPROBES 36 select HAVE_KPROBES 37 select HAVE_LMB 38 select USE_GENERIC_SMP_HELPERS if SMP 39 select RTC_DRV_CMOS 40 select RTC_DRV_BQ4802 41 select RTC_DRV_SUN4V 42 select RTC_DRV_STARFIRE 43 44config 64BIT 45 def_bool y if SPARC64 46 47config GENERIC_TIME 48 bool 49 default y if SPARC64 50 51config GENERIC_CMOS_UPDATE 52 bool 53 default y if SPARC64 54 55config GENERIC_CLOCKEVENTS 56 bool 57 default y if SPARC64 58 59config IOMMU_HELPER 60 bool 61 default y if SPARC64 62 63config QUICKLIST 64 bool 65 default y if SPARC64 66 67config STACKTRACE_SUPPORT 68 bool 69 default y if SPARC64 70 71config LOCKDEP_SUPPORT 72 bool 73 default y if SPARC64 74 75config HAVE_LATENCYTOP_SUPPORT 76 bool 77 default y if SPARC64 78 79config AUDIT_ARCH 80 bool 81 default y if SPARC64 82 83config HAVE_SETUP_PER_CPU_AREA 84 def_bool y if SPARC64 85 86config GENERIC_HARDIRQS_NO__DO_IRQ 87 bool 88 def_bool y if SPARC64 89 90config MMU 91 bool 92 default y 93 94config HIGHMEM 95 bool 96 default y if SPARC32 97 98config ZONE_DMA 99 bool 100 default y if SPARC32 101 102config GENERIC_ISA_DMA 103 bool 104 default y if SPARC32 105 106config GENERIC_GPIO 107 bool 108 help 109 Generic GPIO API support 110 111config ARCH_NO_VIRT_TO_BUS 112 def_bool y 113 114config OF 115 def_bool y 116 117source "init/Kconfig" 118 119source "kernel/Kconfig.freezer" 120 121menu "Processor type and features" 122 123config SMP 124 bool "Symmetric multi-processing support (does not work on sun4/sun4c)" 125 ---help--- 126 This enables support for systems with more than one CPU. If you have 127 a system with only one CPU, say N. If you have a system with more 128 than one CPU, say Y. 129 130 If you say N here, the kernel will run on single and multiprocessor 131 machines, but will use only one CPU of a multiprocessor machine. If 132 you say Y here, the kernel will run on many, but not all, 133 singleprocessor machines. On a singleprocessor machine, the kernel 134 will run faster if you say N here. 135 136 People using multiprocessor machines who say Y here should also say 137 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 138 Management" code will be disabled if you say Y here. 139 140 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 141 available at <http://www.tldp.org/docs.html#howto>. 142 143 If you don't know what to do here, say N. 144 145config NR_CPUS 146 int "Maximum number of CPUs" 147 depends on SMP 148 range 2 32 if SPARC32 149 range 2 1024 if SPARC64 150 default 32 if SPARC32 151 default 64 if SPARC64 152 153source kernel/Kconfig.hz 154 155config RWSEM_GENERIC_SPINLOCK 156 bool 157 default y if SPARC32 158 159config RWSEM_XCHGADD_ALGORITHM 160 bool 161 default y if SPARC64 162 163config GENERIC_FIND_NEXT_BIT 164 bool 165 default y 166 167config GENERIC_HWEIGHT 168 bool 169 default y if !ULTRA_HAS_POPULATION_COUNT 170 171config GENERIC_CALIBRATE_DELAY 172 bool 173 default y 174 175config ARCH_MAY_HAVE_PC_FDC 176 bool 177 default y 178 179config ARCH_HAS_ILOG2_U32 180 bool 181 default n 182 183config ARCH_HAS_ILOG2_U64 184 bool 185 default n 186 187config EMULATED_CMPXCHG 188 bool 189 default y if SPARC32 190 help 191 Sparc32 does not have a CAS instruction like sparc64. cmpxchg() 192 is emulated, and therefore it is not completely atomic. 193 194choice 195 prompt "Kernel page size" if SPARC64 196 default SPARC64_PAGE_SIZE_8KB 197 198config SPARC64_PAGE_SIZE_8KB 199 bool "8KB" 200 help 201 This lets you select the page size of the kernel. 202 203 8KB and 64KB work quite well, since SPARC ELF sections 204 provide for up to 64KB alignment. 205 206 If you don't know what to do, choose 8KB. 207 208config SPARC64_PAGE_SIZE_64KB 209 bool "64KB" 210 211endchoice 212 213config SECCOMP 214 bool "Enable seccomp to safely compute untrusted bytecode" 215 depends on SPARC64 && PROC_FS 216 default y 217 help 218 This kernel feature is useful for number crunching applications 219 that may need to compute untrusted bytecode during their 220 execution. By using pipes or other transports made available to 221 the process as file descriptors supporting the read/write 222 syscalls, it's possible to isolate those applications in 223 their own address space using seccomp. Once seccomp is 224 enabled via /proc/<pid>/seccomp, it cannot be disabled 225 and the task is only allowed to execute a few safe syscalls 226 defined by each seccomp mode. 227 228 If unsure, say Y. Only embedded should say N here. 229 230config HOTPLUG_CPU 231 bool "Support for hot-pluggable CPUs" 232 depends on SPARC64 && SMP 233 select HOTPLUG 234 help 235 Say Y here to experiment with turning CPUs off and on. CPUs 236 can be controlled through /sys/devices/system/cpu/cpu#. 237 Say N if you want to disable CPU hotplug. 238 239config GENERIC_HARDIRQS 240 bool 241 default y if SPARC64 242 243source "kernel/time/Kconfig" 244 245if SPARC64 246source "drivers/cpufreq/Kconfig" 247 248config US3_FREQ 249 tristate "UltraSPARC-III CPU Frequency driver" 250 depends on CPU_FREQ 251 select CPU_FREQ_TABLE 252 help 253 This adds the CPUFreq driver for UltraSPARC-III processors. 254 255 For details, take a look at <file:Documentation/cpu-freq>. 256 257 If in doubt, say N. 258 259config US2E_FREQ 260 tristate "UltraSPARC-IIe CPU Frequency driver" 261 depends on CPU_FREQ 262 select CPU_FREQ_TABLE 263 help 264 This adds the CPUFreq driver for UltraSPARC-IIe processors. 265 266 For details, take a look at <file:Documentation/cpu-freq>. 267 268 If in doubt, say N. 269 270endif 271 272config US3_MC 273 tristate "UltraSPARC-III Memory Controller driver" 274 depends on SPARC64 275 default y 276 help 277 This adds a driver for the UltraSPARC-III memory controller. 278 Loading this driver allows exact mnemonic strings to be 279 printed in the event of a memory error, so that the faulty DIMM 280 on the motherboard can be matched to the error. 281 282 If in doubt, say Y, as this information can be very useful. 283 284# Global things across all Sun machines. 285config GENERIC_LOCKBREAK 286 bool 287 default y 288 depends on SPARC64 && SMP && PREEMPT 289 290choice 291 prompt "SPARC64 Huge TLB Page Size" 292 depends on SPARC64 && HUGETLB_PAGE 293 default HUGETLB_PAGE_SIZE_4MB 294 295config HUGETLB_PAGE_SIZE_4MB 296 bool "4MB" 297 298config HUGETLB_PAGE_SIZE_512K 299 bool "512K" 300 301config HUGETLB_PAGE_SIZE_64K 302 depends on !SPARC64_PAGE_SIZE_64KB 303 bool "64K" 304 305endchoice 306 307config NUMA 308 bool "NUMA support" 309 depends on SPARC64 && SMP 310 311config NODES_SHIFT 312 int 313 default "4" 314 depends on NEED_MULTIPLE_NODES 315 316# Some NUMA nodes have memory ranges that span 317# other nodes. Even though a pfn is valid and 318# between a node's start and end pfns, it may not 319# reside on that node. See memmap_init_zone() 320# for details. 321config NODES_SPAN_OTHER_NODES 322 def_bool y 323 depends on NEED_MULTIPLE_NODES 324 325config ARCH_POPULATES_NODE_MAP 326 def_bool y if SPARC64 327 328config ARCH_SELECT_MEMORY_MODEL 329 def_bool y if SPARC64 330 331config ARCH_SPARSEMEM_ENABLE 332 def_bool y if SPARC64 333 select SPARSEMEM_VMEMMAP_ENABLE 334 335config ARCH_SPARSEMEM_DEFAULT 336 def_bool y if SPARC64 337 338source "mm/Kconfig" 339 340config SCHED_SMT 341 bool "SMT (Hyperthreading) scheduler support" 342 depends on SPARC64 && SMP 343 default y 344 help 345 SMT scheduler support improves the CPU scheduler's decision making 346 when dealing with SPARC cpus at a cost of slightly increased overhead 347 in some places. If unsure say N here. 348 349config SCHED_MC 350 bool "Multi-core scheduler support" 351 depends on SPARC64 && SMP 352 default y 353 help 354 Multi-core scheduler support improves the CPU scheduler's decision 355 making when dealing with multi-core CPU chips at a cost of slightly 356 increased overhead in some places. If unsure say N here. 357 358if SPARC64 359source "kernel/Kconfig.preempt" 360endif 361 362config CMDLINE_BOOL 363 bool "Default bootloader kernel arguments" 364 depends on SPARC64 365 366config CMDLINE 367 string "Initial kernel command string" 368 depends on CMDLINE_BOOL 369 default "console=ttyS0,9600 root=/dev/sda1" 370 help 371 Say Y here if you want to be able to pass default arguments to 372 the kernel. This will be overridden by the bootloader, if you 373 use one (such as SILO). This is most useful if you want to boot 374 a kernel from TFTP, and want default options to be available 375 with having them passed on the command line. 376 377 NOTE: This option WILL override the PROM bootargs setting! 378 379config SUN_PM 380 bool 381 default y if SPARC32 382 help 383 Enable power management and CPU standby features on supported 384 SPARC platforms. 385 386config SPARC_LED 387 tristate "Sun4m LED driver" 388 depends on SPARC32 389 help 390 This driver toggles the front-panel LED on sun4m systems 391 in a user-specifiable manner. Its state can be probed 392 by reading /proc/led and its blinking mode can be changed 393 via writes to /proc/led 394 395config SERIAL_CONSOLE 396 bool 397 depends on SPARC32 398 default y 399 ---help--- 400 If you say Y here, it will be possible to use a serial port as the 401 system console (the system console is the device which receives all 402 kernel messages and warnings and which allows logins in single user 403 mode). This could be useful if some terminal or printer is connected 404 to that serial port. 405 406 Even if you say Y here, the currently visible virtual console 407 (/dev/tty0) will still be used as the system console by default, but 408 you can alter that using a kernel command line option such as 409 "console=ttyS1". (Try "man bootparam" or see the documentation of 410 your boot loader (silo) about how to pass options to the kernel at 411 boot time.) 412 413 If you don't have a graphics card installed and you say Y here, the 414 kernel will automatically use the first serial line, /dev/ttyS0, as 415 system console. 416 417 If unsure, say N. 418 419endmenu 420 421menu "Bus options (PCI etc.)" 422config ISA 423 bool 424 help 425 ISA is found on Espresso only and is not supported currently. 426 427config ISAPNP 428 bool 429 help 430 ISAPNP is not supported 431 432config EISA 433 bool 434 help 435 EISA is not supported. 436 437config MCA 438 bool 439 help 440 MCA is not supported. 441 442config SBUS 443 bool 444 default y 445 446config SBUSCHAR 447 bool 448 default y 449 450config SUN_AUXIO 451 bool 452 default y 453 454config SUN_IO 455 bool 456 default y 457 458config SUN_LDOMS 459 bool "Sun Logical Domains support" 460 depends on SPARC64 461 help 462 Say Y here is you want to support virtual devices via 463 Logical Domains. 464 465config PCI 466 bool "Support for PCI and PS/2 keyboard/mouse" 467 select ARCH_SUPPORTS_MSI if SPARC64 468 help 469 Find out whether your system includes a PCI bus. PCI is the name of 470 a bus system, i.e. the way the CPU talks to the other stuff inside 471 your box. If you say Y here, the kernel will include drivers and 472 infrastructure code to support PCI bus devices. 473 474 CONFIG_PCI is needed for all JavaStation's (including MrCoffee), 475 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC. 476 All of these platforms are extremely obscure, so say N if unsure. 477 478config PCI_DOMAINS 479 def_bool PCI if SPARC64 480 481config PCI_SYSCALL 482 def_bool PCI 483 484source "drivers/pci/Kconfig" 485 486source "drivers/pcmcia/Kconfig" 487 488config SUN_OPENPROMFS 489 tristate "Openprom tree appears in /proc/openprom" 490 help 491 If you say Y, the OpenPROM device tree will be available as a 492 virtual file system, which you can mount to /proc/openprom by "mount 493 -t openpromfs none /proc/openprom". 494 495 To compile the /proc/openprom support as a module, choose M here: the 496 module will be called openpromfs. 497 498 Only choose N if you know in advance that you will not need to modify 499 OpenPROM settings on the running system. 500 501 502endmenu 503 504menu "Executable file formats" 505 506source "fs/Kconfig.binfmt" 507 508config COMPAT 509 bool 510 depends on SPARC64 511 default y 512 select COMPAT_BINFMT_ELF 513 514config SYSVIPC_COMPAT 515 bool 516 depends on COMPAT && SYSVIPC 517 default y 518 519endmenu 520 521source "net/Kconfig" 522 523source "drivers/Kconfig" 524 525source "drivers/sbus/char/Kconfig" 526 527source "fs/Kconfig" 528 529source "arch/sparc/Kconfig.debug" 530 531source "security/Kconfig" 532 533source "crypto/Kconfig" 534 535source "lib/Kconfig" 536