1# SPDX-License-Identifier: GPL-2.0-only 2config 64BIT 3 bool "64-bit kernel" if "$(ARCH)" = "sparc" 4 default "$(ARCH)" = "sparc64" 5 help 6 SPARC is a family of RISC microprocessors designed and marketed by 7 Sun Microsystems, incorporated. They are very widely found in Sun 8 workstations and clones. 9 10 Say yes to build a 64-bit kernel - formerly known as sparc64 11 Say no to build a 32-bit kernel - formerly known as sparc 12 13config SPARC 14 bool 15 default y 16 select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI 17 select ARCH_MIGHT_HAVE_PC_SERIO 18 select OF 19 select OF_PROMTREE 20 select HAVE_ASM_MODVERSIONS 21 select HAVE_IDE 22 select HAVE_OPROFILE 23 select HAVE_ARCH_KGDB if !SMP || SPARC64 24 select HAVE_ARCH_TRACEHOOK 25 select HAVE_EXIT_THREAD 26 select HAVE_PCI 27 select SYSCTL_EXCEPTION_TRACE 28 select RTC_CLASS 29 select RTC_DRV_M48T59 30 select RTC_SYSTOHC 31 select HAVE_ARCH_JUMP_LABEL if SPARC64 32 select HAVE_FAST_GUP if SPARC64 33 select GENERIC_IRQ_SHOW 34 select ARCH_WANT_IPC_PARSE_VERSION 35 select GENERIC_PCI_IOMAP 36 select HAVE_NMI_WATCHDOG if SPARC64 37 select HAVE_CBPF_JIT if SPARC32 38 select HAVE_EBPF_JIT if SPARC64 39 select HAVE_DEBUG_BUGVERBOSE 40 select GENERIC_SMP_IDLE_THREAD 41 select GENERIC_CLOCKEVENTS 42 select GENERIC_STRNCPY_FROM_USER 43 select GENERIC_STRNLEN_USER 44 select MODULES_USE_ELF_RELA 45 select PCI_SYSCALL if PCI 46 select ODD_RT_SIGACTION 47 select OLD_SIGSUSPEND 48 select CPU_NO_EFFICIENT_FFS 49 select LOCKDEP_SMALL if LOCKDEP 50 select NEED_DMA_MAP_STATE 51 select NEED_SG_DMA_LENGTH 52 53config SPARC32 54 def_bool !64BIT 55 select ARCH_32BIT_OFF_T 56 select ARCH_HAS_SYNC_DMA_FOR_CPU 57 select GENERIC_ATOMIC64 58 select CLZ_TAB 59 select HAVE_UID16 60 select OLD_SIGACTION 61 62config SPARC64 63 def_bool 64BIT 64 select HAVE_FUNCTION_TRACER 65 select HAVE_FUNCTION_GRAPH_TRACER 66 select HAVE_KRETPROBES 67 select HAVE_KPROBES 68 select HAVE_RCU_TABLE_FREE if SMP 69 select HAVE_RCU_TABLE_NO_INVALIDATE if HAVE_RCU_TABLE_FREE 70 select HAVE_MEMBLOCK_NODE_MAP 71 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 72 select HAVE_DYNAMIC_FTRACE 73 select HAVE_FTRACE_MCOUNT_RECORD 74 select HAVE_SYSCALL_TRACEPOINTS 75 select HAVE_CONTEXT_TRACKING 76 select HAVE_DEBUG_KMEMLEAK 77 select IOMMU_HELPER 78 select SPARSE_IRQ 79 select RTC_DRV_CMOS 80 select RTC_DRV_BQ4802 81 select RTC_DRV_SUN4V 82 select RTC_DRV_STARFIRE 83 select HAVE_PERF_EVENTS 84 select PERF_USE_VMALLOC 85 select IRQ_PREFLOW_FASTEOI 86 select ARCH_HAVE_NMI_SAFE_CMPXCHG 87 select HAVE_C_RECORDMCOUNT 88 select HAVE_ARCH_AUDITSYSCALL 89 select ARCH_SUPPORTS_ATOMIC_RMW 90 select HAVE_NMI 91 select HAVE_REGS_AND_STACK_ACCESS_API 92 select ARCH_USE_QUEUED_RWLOCKS 93 select ARCH_USE_QUEUED_SPINLOCKS 94 select GENERIC_TIME_VSYSCALL 95 select ARCH_CLOCKSOURCE_DATA 96 select ARCH_HAS_PTE_SPECIAL 97 select PCI_DOMAINS if PCI 98 select ARCH_HAS_GIGANTIC_PAGE 99 100config ARCH_DEFCONFIG 101 string 102 default "arch/sparc/configs/sparc32_defconfig" if SPARC32 103 default "arch/sparc/configs/sparc64_defconfig" if SPARC64 104 105config ARCH_PROC_KCORE_TEXT 106 def_bool y 107 108config CPU_BIG_ENDIAN 109 def_bool y 110 111config ARCH_ATU 112 bool 113 default y if SPARC64 114 115config STACKTRACE_SUPPORT 116 bool 117 default y if SPARC64 118 119config LOCKDEP_SUPPORT 120 bool 121 default y if SPARC64 122 123config ARCH_HIBERNATION_POSSIBLE 124 def_bool y if SPARC64 125 126config AUDIT_ARCH 127 bool 128 default y 129 130config HAVE_SETUP_PER_CPU_AREA 131 def_bool y if SPARC64 132 133config NEED_PER_CPU_EMBED_FIRST_CHUNK 134 def_bool y if SPARC64 135 136config NEED_PER_CPU_PAGE_FIRST_CHUNK 137 def_bool y if SPARC64 138 139config MMU 140 bool 141 default y 142 143config HIGHMEM 144 bool 145 default y if SPARC32 146 147config ZONE_DMA 148 bool 149 default y if SPARC32 150 151config GENERIC_ISA_DMA 152 bool 153 default y if SPARC32 154 155config ARCH_SUPPORTS_DEBUG_PAGEALLOC 156 def_bool y if SPARC64 157 158config PGTABLE_LEVELS 159 default 4 if 64BIT 160 default 3 161 162config ARCH_SUPPORTS_UPROBES 163 def_bool y if SPARC64 164 165menu "Processor type and features" 166 167config SMP 168 bool "Symmetric multi-processing support" 169 ---help--- 170 This enables support for systems with more than one CPU. If you have 171 a system with only one CPU, say N. If you have a system with more 172 than one CPU, say Y. 173 174 If you say N here, the kernel will run on uni- and multiprocessor 175 machines, but will use only one CPU of a multiprocessor machine. If 176 you say Y here, the kernel will run on many, but not all, 177 uniprocessor machines. On a uniprocessor machine, the kernel 178 will run faster if you say N here. 179 180 People using multiprocessor machines who say Y here should also say 181 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 182 Management" code will be disabled if you say Y here. 183 184 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 185 available at <http://www.tldp.org/docs.html#howto>. 186 187 If you don't know what to do here, say N. 188 189config NR_CPUS 190 int "Maximum number of CPUs" 191 depends on SMP 192 range 2 32 if SPARC32 193 range 2 4096 if SPARC64 194 default 32 if SPARC32 195 default 4096 if SPARC64 196 197source "kernel/Kconfig.hz" 198 199config GENERIC_HWEIGHT 200 bool 201 default y 202 203config GENERIC_CALIBRATE_DELAY 204 bool 205 default y 206 207config ARCH_MAY_HAVE_PC_FDC 208 bool 209 default y 210 211config EMULATED_CMPXCHG 212 bool 213 default y if SPARC32 214 help 215 Sparc32 does not have a CAS instruction like sparc64. cmpxchg() 216 is emulated, and therefore it is not completely atomic. 217 218# Makefile helpers 219config SPARC32_SMP 220 bool 221 default y 222 depends on SPARC32 && SMP 223 224config SPARC64_SMP 225 bool 226 default y 227 depends on SPARC64 && SMP 228 229config EARLYFB 230 bool "Support for early boot text console" 231 default y 232 depends on SPARC64 233 help 234 Say Y here to enable a faster early framebuffer boot console. 235 236config SECCOMP 237 bool "Enable seccomp to safely compute untrusted bytecode" 238 depends on SPARC64 && PROC_FS 239 default y 240 help 241 This kernel feature is useful for number crunching applications 242 that may need to compute untrusted bytecode during their 243 execution. By using pipes or other transports made available to 244 the process as file descriptors supporting the read/write 245 syscalls, it's possible to isolate those applications in 246 their own address space using seccomp. Once seccomp is 247 enabled via /proc/<pid>/seccomp, it cannot be disabled 248 and the task is only allowed to execute a few safe syscalls 249 defined by each seccomp mode. 250 251 If unsure, say Y. Only embedded should say N here. 252 253config HOTPLUG_CPU 254 bool "Support for hot-pluggable CPUs" 255 depends on SPARC64 && SMP 256 help 257 Say Y here to experiment with turning CPUs off and on. CPUs 258 can be controlled through /sys/devices/system/cpu/cpu#. 259 Say N if you want to disable CPU hotplug. 260 261if SPARC64 262source "drivers/cpufreq/Kconfig" 263endif 264 265config US3_MC 266 tristate "UltraSPARC-III Memory Controller driver" 267 depends on SPARC64 268 default y 269 help 270 This adds a driver for the UltraSPARC-III memory controller. 271 Loading this driver allows exact mnemonic strings to be 272 printed in the event of a memory error, so that the faulty DIMM 273 on the motherboard can be matched to the error. 274 275 If in doubt, say Y, as this information can be very useful. 276 277# Global things across all Sun machines. 278config GENERIC_LOCKBREAK 279 bool 280 default y 281 depends on SPARC64 && SMP && PREEMPT 282 283config NUMA 284 bool "NUMA support" 285 depends on SPARC64 && SMP 286 287config NODES_SHIFT 288 int "Maximum NUMA Nodes (as a power of 2)" 289 range 4 5 if SPARC64 290 default "5" 291 depends on NEED_MULTIPLE_NODES 292 help 293 Specify the maximum number of NUMA Nodes available on the target 294 system. Increases memory reserved to accommodate various tables. 295 296# Some NUMA nodes have memory ranges that span 297# other nodes. Even though a pfn is valid and 298# between a node's start and end pfns, it may not 299# reside on that node. See memmap_init_zone() 300# for details. 301config NODES_SPAN_OTHER_NODES 302 def_bool y 303 depends on NEED_MULTIPLE_NODES 304 305config ARCH_SPARSEMEM_ENABLE 306 def_bool y if SPARC64 307 select SPARSEMEM_VMEMMAP_ENABLE 308 309config ARCH_SPARSEMEM_DEFAULT 310 def_bool y if SPARC64 311 312config FORCE_MAX_ZONEORDER 313 int "Maximum zone order" 314 default "13" 315 help 316 The kernel memory allocator divides physically contiguous memory 317 blocks into "zones", where each zone is a power of two number of 318 pages. This option selects the largest power of two that the kernel 319 keeps in the memory allocator. If you need to allocate very large 320 blocks of physically contiguous memory, then you may need to 321 increase this value. 322 323 This config option is actually maximum order plus one. For example, 324 a value of 13 means that the largest free memory block is 2^12 pages. 325 326if SPARC64 327source "kernel/power/Kconfig" 328endif 329 330config SCHED_SMT 331 bool "SMT (Hyperthreading) scheduler support" 332 depends on SPARC64 && SMP 333 default y 334 help 335 SMT scheduler support improves the CPU scheduler's decision making 336 when dealing with SPARC cpus at a cost of slightly increased overhead 337 in some places. If unsure say N here. 338 339config SCHED_MC 340 bool "Multi-core scheduler support" 341 depends on SPARC64 && SMP 342 default y 343 help 344 Multi-core scheduler support improves the CPU scheduler's decision 345 making when dealing with multi-core CPU chips at a cost of slightly 346 increased overhead in some places. If unsure say N here. 347 348config CMDLINE_BOOL 349 bool "Default bootloader kernel arguments" 350 depends on SPARC64 351 352config CMDLINE 353 string "Initial kernel command string" 354 depends on CMDLINE_BOOL 355 default "console=ttyS0,9600 root=/dev/sda1" 356 help 357 Say Y here if you want to be able to pass default arguments to 358 the kernel. This will be overridden by the bootloader, if you 359 use one (such as SILO). This is most useful if you want to boot 360 a kernel from TFTP, and want default options to be available 361 with having them passed on the command line. 362 363 NOTE: This option WILL override the PROM bootargs setting! 364 365config SUN_PM 366 bool 367 default y if SPARC32 368 help 369 Enable power management and CPU standby features on supported 370 SPARC platforms. 371 372config SPARC_LED 373 tristate "Sun4m LED driver" 374 depends on SPARC32 375 help 376 This driver toggles the front-panel LED on sun4m systems 377 in a user-specifiable manner. Its state can be probed 378 by reading /proc/led and its blinking mode can be changed 379 via writes to /proc/led 380 381config SERIAL_CONSOLE 382 bool 383 depends on SPARC32 384 default y 385 ---help--- 386 If you say Y here, it will be possible to use a serial port as the 387 system console (the system console is the device which receives all 388 kernel messages and warnings and which allows logins in single user 389 mode). This could be useful if some terminal or printer is connected 390 to that serial port. 391 392 Even if you say Y here, the currently visible virtual console 393 (/dev/tty0) will still be used as the system console by default, but 394 you can alter that using a kernel command line option such as 395 "console=ttyS1". (Try "man bootparam" or see the documentation of 396 your boot loader (silo) about how to pass options to the kernel at 397 boot time.) 398 399 If you don't have a graphics card installed and you say Y here, the 400 kernel will automatically use the first serial line, /dev/ttyS0, as 401 system console. 402 403 If unsure, say N. 404 405config SPARC_LEON 406 bool "Sparc Leon processor family" 407 depends on SPARC32 408 select USB_EHCI_BIG_ENDIAN_MMIO 409 select USB_EHCI_BIG_ENDIAN_DESC 410 select USB_UHCI_BIG_ENDIAN_MMIO 411 select USB_UHCI_BIG_ENDIAN_DESC 412 ---help--- 413 If you say Y here if you are running on a SPARC-LEON processor. 414 The LEON processor is a synthesizable VHDL model of the 415 SPARC-v8 standard. LEON is part of the GRLIB collection of 416 IP cores that are distributed under GPL. GRLIB can be downloaded 417 from www.gaisler.com. You can download a sparc-linux cross-compilation 418 toolchain at www.gaisler.com. 419 420if SPARC_LEON 421menu "U-Boot options" 422 423config UBOOT_LOAD_ADDR 424 hex "uImage Load Address" 425 default 0x40004000 426 ---help--- 427 U-Boot kernel load address, the address in physical address space 428 where u-boot will place the Linux kernel before booting it. 429 This address is normally the base address of main memory + 0x4000. 430 431config UBOOT_FLASH_ADDR 432 hex "uImage.o Load Address" 433 default 0x00080000 434 ---help--- 435 Optional setting only affecting the uImage.o ELF-image used to 436 download the uImage file to the target using a ELF-loader other than 437 U-Boot. It may for example be used to download an uImage to FLASH with 438 the GRMON utility before even starting u-boot. 439 440config UBOOT_ENTRY_ADDR 441 hex "uImage Entry Address" 442 default 0xf0004000 443 ---help--- 444 Do not change this unless you know what you're doing. This is 445 hardcoded by the SPARC32 and LEON port. 446 447 This is the virtual address u-boot jumps to when booting the Linux 448 Kernel. 449 450endmenu 451endif 452 453endmenu 454 455menu "Bus options (PCI etc.)" 456config SBUS 457 bool 458 default y 459 460config SBUSCHAR 461 bool 462 default y 463 464config SUN_LDOMS 465 bool "Sun Logical Domains support" 466 depends on SPARC64 467 help 468 Say Y here is you want to support virtual devices via 469 Logical Domains. 470 471config PCIC_PCI 472 bool 473 depends on PCI && SPARC32 && !SPARC_LEON 474 default y 475 476config LEON_PCI 477 bool 478 depends on PCI && SPARC_LEON 479 default y 480 481config SPARC_GRPCI1 482 bool "GRPCI Host Bridge Support" 483 depends on LEON_PCI 484 default y 485 help 486 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI 487 PCI host controller is typically found in GRLIB SPARC32/LEON 488 systems. The driver has one property (all_pci_errors) controlled 489 from the bootloader that makes the GRPCI to generate interrupts 490 on detected PCI Parity and System errors. 491 492config SPARC_GRPCI2 493 bool "GRPCI2 Host Bridge Support" 494 depends on LEON_PCI 495 default y 496 help 497 Say Y here to include the GRPCI2 Host Bridge Driver. 498 499config SUN_OPENPROMFS 500 tristate "Openprom tree appears in /proc/openprom" 501 help 502 If you say Y, the OpenPROM device tree will be available as a 503 virtual file system, which you can mount to /proc/openprom by "mount 504 -t openpromfs none /proc/openprom". 505 506 To compile the /proc/openprom support as a module, choose M here: the 507 module will be called openpromfs. 508 509 Only choose N if you know in advance that you will not need to modify 510 OpenPROM settings on the running system. 511 512# Makefile helpers 513config SPARC64_PCI 514 bool 515 default y 516 depends on SPARC64 && PCI 517 518config SPARC64_PCI_MSI 519 bool 520 default y 521 depends on SPARC64_PCI && PCI_MSI 522 523endmenu 524 525config COMPAT 526 bool 527 depends on SPARC64 528 default y 529 select COMPAT_BINFMT_ELF 530 select HAVE_UID16 531 select ARCH_WANT_OLD_COMPAT_IPC 532 select COMPAT_OLD_SIGACTION 533 534config SYSVIPC_COMPAT 535 bool 536 depends on COMPAT && SYSVIPC 537 default y 538 539source "drivers/sbus/char/Kconfig" 540