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