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