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_HAS_CPU_CACHE_ALIASING 17 select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI 18 select ARCH_MIGHT_HAVE_PC_SERIO 19 select DMA_OPS 20 select OF 21 select OF_PROMTREE 22 select HAVE_ASM_MODVERSIONS 23 select HAVE_ARCH_KGDB if !SMP || SPARC64 24 select HAVE_ARCH_TRACEHOOK 25 select HAVE_ARCH_SECCOMP if SPARC64 26 select HAVE_EXIT_THREAD 27 select HAVE_PCI 28 select SYSCTL_EXCEPTION_TRACE 29 select RTC_CLASS 30 select RTC_DRV_M48T59 31 select RTC_SYSTOHC 32 select HAVE_ARCH_JUMP_LABEL if SPARC64 33 select GENERIC_IRQ_SHOW 34 select ARCH_WANT_IPC_PARSE_VERSION 35 select GENERIC_PCI_IOMAP 36 select HAS_IOPORT 37 select HAVE_HARDLOCKUP_DETECTOR_SPARC64 if SPARC64 38 select HAVE_CBPF_JIT if SPARC32 39 select HAVE_EBPF_JIT if SPARC64 40 select HAVE_DEBUG_BUGVERBOSE 41 select GENERIC_SMP_IDLE_THREAD 42 select MODULES_USE_ELF_RELA 43 select PCI_SYSCALL if PCI 44 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI 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 select TRACE_IRQFLAGS_SUPPORT 52 53config SPARC32 54 def_bool !64BIT 55 select ARCH_32BIT_OFF_T 56 select ARCH_HAS_CPU_FINALIZE_INIT if !SMP 57 select ARCH_HAS_SYNC_DMA_FOR_CPU 58 select CLZ_TAB 59 select DMA_DIRECT_REMAP 60 select GENERIC_ATOMIC64 61 select HAVE_UID16 62 select HAVE_PAGE_SIZE_4KB 63 select LOCK_MM_AND_FIND_VMA 64 select OLD_SIGACTION 65 select ZONE_DMA 66 67config SPARC64 68 def_bool 64BIT 69 select ALTERNATE_USER_ADDRESS_SPACE 70 select HAVE_FUNCTION_TRACER 71 select HAVE_FUNCTION_GRAPH_TRACER 72 select HAVE_KRETPROBES 73 select HAVE_KPROBES 74 select MMU_GATHER_RCU_TABLE_FREE if SMP 75 select MMU_GATHER_MERGE_VMAS 76 select MMU_GATHER_NO_FLUSH_CACHE 77 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 78 select HAVE_DYNAMIC_FTRACE 79 select HAVE_FTRACE_MCOUNT_RECORD 80 select HAVE_PAGE_SIZE_8KB 81 select HAVE_SYSCALL_TRACEPOINTS 82 select HAVE_CONTEXT_TRACKING_USER 83 select HAVE_TIF_NOHZ 84 select HAVE_DEBUG_KMEMLEAK 85 select IOMMU_HELPER 86 select SPARSE_IRQ 87 select RTC_DRV_CMOS 88 select RTC_DRV_BQ4802 89 select RTC_DRV_SUN4V 90 select RTC_DRV_STARFIRE 91 select HAVE_PERF_EVENTS 92 select PERF_USE_VMALLOC 93 select ARCH_HAVE_NMI_SAFE_CMPXCHG 94 select HAVE_C_RECORDMCOUNT 95 select HAVE_ARCH_AUDITSYSCALL 96 select ARCH_SUPPORTS_ATOMIC_RMW 97 select ARCH_SUPPORTS_DEBUG_PAGEALLOC 98 select HAVE_NMI 99 select HAVE_REGS_AND_STACK_ACCESS_API 100 select ARCH_USE_QUEUED_RWLOCKS 101 select ARCH_USE_QUEUED_SPINLOCKS 102 select GENERIC_TIME_VSYSCALL 103 select ARCH_CLOCKSOURCE_DATA 104 select ARCH_HAS_PTE_SPECIAL 105 select PCI_DOMAINS if PCI 106 select ARCH_HAS_GIGANTIC_PAGE 107 select HAVE_SOFTIRQ_ON_OWN_STACK 108 select HAVE_SETUP_PER_CPU_AREA 109 select NEED_PER_CPU_EMBED_FIRST_CHUNK 110 select NEED_PER_CPU_PAGE_FIRST_CHUNK 111 112config ARCH_PROC_KCORE_TEXT 113 def_bool y 114 115config CPU_BIG_ENDIAN 116 def_bool y 117 118config ARCH_ATU 119 bool 120 default y if SPARC64 121 122config STACKTRACE_SUPPORT 123 bool 124 default y if SPARC64 125 126config LOCKDEP_SUPPORT 127 bool 128 default y if SPARC64 129 130config ARCH_HIBERNATION_POSSIBLE 131 def_bool y if SPARC64 132 133config AUDIT_ARCH 134 bool 135 default y 136 137config MMU 138 bool 139 default y 140 141config HIGHMEM 142 bool 143 default y if SPARC32 144 select KMAP_LOCAL 145 146config GENERIC_ISA_DMA 147 bool 148 default y if SPARC32 149 150config PGTABLE_LEVELS 151 default 4 if 64BIT 152 default 3 153 154config ARCH_SUPPORTS_UPROBES 155 def_bool y if SPARC64 156 157menu "Processor type and features" 158 159config SMP 160 bool "Symmetric multi-processing support" 161 help 162 This enables support for systems with more than one CPU. If you have 163 a system with only one CPU, say N. If you have a system with more 164 than one CPU, say Y. 165 166 If you say N here, the kernel will run on uni- and multiprocessor 167 machines, but will use only one CPU of a multiprocessor machine. If 168 you say Y here, the kernel will run on many, but not all, 169 uniprocessor machines. On a uniprocessor machine, the kernel 170 will run faster if you say N here. 171 172 People using multiprocessor machines who say Y here should also say 173 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 174 Management" code will be disabled if you say Y here. 175 176 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 177 available at <https://www.tldp.org/docs.html#howto>. 178 179 If you don't know what to do here, say N. 180 181config NR_CPUS 182 int "Maximum number of CPUs" 183 depends on SMP 184 range 2 32 if SPARC32 185 range 2 4096 if SPARC64 186 default 32 if SPARC32 187 default 4096 if SPARC64 188 189source "kernel/Kconfig.hz" 190 191config GENERIC_HWEIGHT 192 bool 193 default y 194 195config GENERIC_CALIBRATE_DELAY 196 bool 197 default y 198 199config ARCH_MAY_HAVE_PC_FDC 200 bool 201 default y 202 203config EMULATED_CMPXCHG 204 bool 205 default y if SPARC32 206 help 207 Sparc32 does not have a CAS instruction like sparc64. cmpxchg() 208 is emulated, and therefore it is not completely atomic. 209 210# Makefile helpers 211config SPARC32_SMP 212 bool 213 default y 214 depends on SPARC32 && SMP 215 216config SPARC64_SMP 217 bool 218 default y 219 depends on SPARC64 && SMP 220 221config EARLYFB 222 bool "Support for early boot text console" 223 default y 224 depends on SPARC64 225 help 226 Say Y here to enable a faster early framebuffer boot console. 227 228config HOTPLUG_CPU 229 bool "Support for hot-pluggable CPUs" 230 depends on SPARC64 && SMP 231 help 232 Say Y here to experiment with turning CPUs off and on. CPUs 233 can be controlled through /sys/devices/system/cpu/cpu#. 234 Say N if you want to disable CPU hotplug. 235 236if SPARC64 237source "drivers/cpufreq/Kconfig" 238endif 239 240config US3_MC 241 tristate "UltraSPARC-III Memory Controller driver" 242 depends on SPARC64 243 default y 244 help 245 This adds a driver for the UltraSPARC-III memory controller. 246 Loading this driver allows exact mnemonic strings to be 247 printed in the event of a memory error, so that the faulty DIMM 248 on the motherboard can be matched to the error. 249 250 If in doubt, say Y, as this information can be very useful. 251 252# Global things across all Sun machines. 253config GENERIC_LOCKBREAK 254 bool 255 default y 256 depends on SPARC64 && SMP && PREEMPTION 257 258config NUMA 259 bool "NUMA support" 260 depends on SPARC64 && SMP 261 262config NODES_SHIFT 263 int "Maximum NUMA Nodes (as a power of 2)" 264 range 4 5 if SPARC64 265 default "5" 266 depends on NUMA 267 help 268 Specify the maximum number of NUMA Nodes available on the target 269 system. Increases memory reserved to accommodate various tables. 270 271config ARCH_SPARSEMEM_ENABLE 272 def_bool y if SPARC64 273 select SPARSEMEM_VMEMMAP_ENABLE 274 275config ARCH_SPARSEMEM_DEFAULT 276 def_bool y if SPARC64 277 278config ARCH_FORCE_MAX_ORDER 279 int "Order of maximal physically contiguous allocations" 280 default "12" 281 help 282 The kernel page allocator limits the size of maximal physically 283 contiguous allocations. The limit is called MAX_PAGE_ORDER and it 284 defines the maximal power of two of number of pages that can be 285 allocated as a single contiguous block. This option allows 286 overriding the default setting when ability to allocate very 287 large blocks of physically contiguous memory is required. 288 289 Don't change if unsure. 290 291if SPARC64 || COMPILE_TEST 292source "kernel/power/Kconfig" 293endif 294 295config SCHED_SMT 296 bool "SMT (Hyperthreading) scheduler support" 297 depends on SPARC64 && SMP 298 default y 299 help 300 SMT scheduler support improves the CPU scheduler's decision making 301 when dealing with SPARC cpus at a cost of slightly increased overhead 302 in some places. If unsure say N here. 303 304config SCHED_MC 305 bool "Multi-core scheduler support" 306 depends on SPARC64 && SMP 307 default y 308 help 309 Multi-core scheduler support improves the CPU scheduler's decision 310 making when dealing with multi-core CPU chips at a cost of slightly 311 increased overhead in some places. If unsure say N here. 312 313config CMDLINE_BOOL 314 bool "Default bootloader kernel arguments" 315 depends on SPARC64 316 317config CMDLINE 318 string "Initial kernel command string" 319 depends on CMDLINE_BOOL 320 default "console=ttyS0,9600 root=/dev/sda1" 321 help 322 Say Y here if you want to be able to pass default arguments to 323 the kernel. This will be overridden by the bootloader, if you 324 use one (such as SILO). This is most useful if you want to boot 325 a kernel from TFTP, and want default options to be available 326 with having them passed on the command line. 327 328 NOTE: This option WILL override the PROM bootargs setting! 329 330config SUN_PM 331 bool 332 default y if SPARC32 333 help 334 Enable power management and CPU standby features on supported 335 SPARC platforms. 336 337config SPARC_LED 338 tristate "Sun4m LED driver" 339 depends on SPARC32 340 help 341 This driver toggles the front-panel LED on sun4m systems 342 in a user-specifiable manner. Its state can be probed 343 by reading /proc/led and its blinking mode can be changed 344 via writes to /proc/led 345 346config SERIAL_CONSOLE 347 bool 348 depends on SPARC32 349 default y 350 help 351 If you say Y here, it will be possible to use a serial port as the 352 system console (the system console is the device which receives all 353 kernel messages and warnings and which allows logins in single user 354 mode). This could be useful if some terminal or printer is connected 355 to that serial port. 356 357 Even if you say Y here, the currently visible virtual console 358 (/dev/tty0) will still be used as the system console by default, but 359 you can alter that using a kernel command line option such as 360 "console=ttyS1". (Try "man bootparam" or see the documentation of 361 your boot loader (silo) about how to pass options to the kernel at 362 boot time.) 363 364 If you don't have a graphics card installed and you say Y here, the 365 kernel will automatically use the first serial line, /dev/ttyS0, as 366 system console. 367 368 If unsure, say N. 369 370config SPARC_LEON 371 bool "Sparc Leon processor family" 372 depends on SPARC32 373 select USB_EHCI_BIG_ENDIAN_MMIO 374 select USB_EHCI_BIG_ENDIAN_DESC 375 select USB_UHCI_BIG_ENDIAN_MMIO 376 select USB_UHCI_BIG_ENDIAN_DESC 377 help 378 If you say Y here if you are running on a SPARC-LEON processor. 379 The LEON processor is a synthesizable VHDL model of the 380 SPARC-v8 standard. LEON is part of the GRLIB collection of 381 IP cores that are distributed under GPL. GRLIB can be downloaded 382 from www.gaisler.com. You can download a sparc-linux cross-compilation 383 toolchain at www.gaisler.com. 384 385if SPARC_LEON 386menu "U-Boot options" 387 388config UBOOT_LOAD_ADDR 389 hex "uImage Load Address" 390 default 0x40004000 391 help 392 U-Boot kernel load address, the address in physical address space 393 where u-boot will place the Linux kernel before booting it. 394 This address is normally the base address of main memory + 0x4000. 395 396config UBOOT_FLASH_ADDR 397 hex "uImage.o Load Address" 398 default 0x00080000 399 help 400 Optional setting only affecting the uImage.o ELF-image used to 401 download the uImage file to the target using a ELF-loader other than 402 U-Boot. It may for example be used to download an uImage to FLASH with 403 the GRMON utility before even starting u-boot. 404 405config UBOOT_ENTRY_ADDR 406 hex "uImage Entry Address" 407 default 0xf0004000 408 help 409 Do not change this unless you know what you're doing. This is 410 hardcoded by the SPARC32 and LEON port. 411 412 This is the virtual address u-boot jumps to when booting the Linux 413 Kernel. 414 415endmenu 416endif 417 418endmenu 419 420menu "Bus options (PCI etc.)" 421config SBUS 422 bool 423 default y 424 425config SBUSCHAR 426 bool 427 default y 428 429config SUN_LDOMS 430 bool "Sun Logical Domains support" 431 depends on SPARC64 432 help 433 Say Y here is you want to support virtual devices via 434 Logical Domains. 435 436config PCIC_PCI 437 bool 438 depends on PCI && SPARC32 && !SPARC_LEON 439 default y 440 441config LEON_PCI 442 bool 443 depends on PCI && SPARC_LEON 444 default y 445 446config SPARC_GRPCI1 447 bool "GRPCI Host Bridge Support" 448 depends on LEON_PCI 449 default y 450 help 451 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI 452 PCI host controller is typically found in GRLIB SPARC32/LEON 453 systems. The driver has one property (all_pci_errors) controlled 454 from the bootloader that makes the GRPCI to generate interrupts 455 on detected PCI Parity and System errors. 456 457config SPARC_GRPCI2 458 bool "GRPCI2 Host Bridge Support" 459 depends on LEON_PCI 460 default y 461 help 462 Say Y here to include the GRPCI2 Host Bridge Driver. 463 464config SUN_OPENPROMFS 465 tristate "Openprom tree appears in /proc/openprom" 466 help 467 If you say Y, the OpenPROM device tree will be available as a 468 virtual file system, which you can mount to /proc/openprom by "mount 469 -t openpromfs none /proc/openprom". 470 471 To compile the /proc/openprom support as a module, choose M here: the 472 module will be called openpromfs. 473 474 Only choose N if you know in advance that you will not need to modify 475 OpenPROM settings on the running system. 476 477# Makefile helpers 478config SPARC64_PCI 479 bool 480 default y 481 depends on SPARC64 && PCI 482 483config SPARC64_PCI_MSI 484 bool 485 default y 486 depends on SPARC64_PCI && PCI_MSI 487 488endmenu 489 490config COMPAT 491 bool 492 depends on SPARC64 493 default y 494 select HAVE_UID16 495 select ARCH_WANT_OLD_COMPAT_IPC 496 select COMPAT_OLD_SIGACTION 497 498source "drivers/sbus/char/Kconfig" 499