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