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 HAS_IOPORT 36 select HAVE_HARDLOCKUP_DETECTOR_SPARC64 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 MODULES_USE_ELF_RELA 42 select PCI_SYSCALL if PCI 43 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI 44 select ODD_RT_SIGACTION 45 select OLD_SIGSUSPEND 46 select CPU_NO_EFFICIENT_FFS 47 select LOCKDEP_SMALL if LOCKDEP 48 select NEED_DMA_MAP_STATE 49 select NEED_SG_DMA_LENGTH 50 select TRACE_IRQFLAGS_SUPPORT 51 52config SPARC32 53 def_bool !64BIT 54 select ARCH_32BIT_OFF_T 55 select ARCH_HAS_CPU_FINALIZE_INIT if !SMP 56 select ARCH_HAS_SYNC_DMA_FOR_CPU 57 select CLZ_TAB 58 select DMA_DIRECT_REMAP 59 select GENERIC_ATOMIC64 60 select HAVE_UID16 61 select HAVE_PAGE_SIZE_4KB 62 select LOCK_MM_AND_FIND_VMA 63 select OLD_SIGACTION 64 select ZONE_DMA 65 66config SPARC64 67 def_bool 64BIT 68 select ALTERNATE_USER_ADDRESS_SPACE 69 select HAVE_FUNCTION_TRACER 70 select HAVE_FUNCTION_GRAPH_TRACER 71 select HAVE_KRETPROBES 72 select HAVE_KPROBES 73 select MMU_GATHER_RCU_TABLE_FREE if SMP 74 select MMU_GATHER_MERGE_VMAS 75 select MMU_GATHER_NO_FLUSH_CACHE 76 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 77 select HAVE_DYNAMIC_FTRACE 78 select HAVE_FTRACE_MCOUNT_RECORD 79 select HAVE_PAGE_SIZE_8KB 80 select HAVE_SYSCALL_TRACEPOINTS 81 select HAVE_CONTEXT_TRACKING_USER 82 select HAVE_TIF_NOHZ 83 select HAVE_DEBUG_KMEMLEAK 84 select IOMMU_HELPER 85 select SPARSE_IRQ 86 select RTC_DRV_CMOS 87 select RTC_DRV_BQ4802 88 select RTC_DRV_SUN4V 89 select RTC_DRV_STARFIRE 90 select HAVE_PERF_EVENTS 91 select PERF_USE_VMALLOC 92 select ARCH_HAVE_NMI_SAFE_CMPXCHG 93 select HAVE_C_RECORDMCOUNT 94 select HAVE_ARCH_AUDITSYSCALL 95 select ARCH_SUPPORTS_ATOMIC_RMW 96 select ARCH_SUPPORTS_DEBUG_PAGEALLOC 97 select HAVE_NMI 98 select HAVE_REGS_AND_STACK_ACCESS_API 99 select ARCH_USE_QUEUED_RWLOCKS 100 select ARCH_USE_QUEUED_SPINLOCKS 101 select GENERIC_TIME_VSYSCALL 102 select ARCH_CLOCKSOURCE_DATA 103 select ARCH_HAS_PTE_SPECIAL 104 select PCI_DOMAINS if PCI 105 select ARCH_HAS_GIGANTIC_PAGE 106 select HAVE_SOFTIRQ_ON_OWN_STACK 107 select HAVE_SETUP_PER_CPU_AREA 108 select NEED_PER_CPU_EMBED_FIRST_CHUNK 109 select NEED_PER_CPU_PAGE_FIRST_CHUNK 110 111config ARCH_PROC_KCORE_TEXT 112 def_bool y 113 114config CPU_BIG_ENDIAN 115 def_bool y 116 117config ARCH_ATU 118 bool 119 default y if SPARC64 120 121config STACKTRACE_SUPPORT 122 bool 123 default y if SPARC64 124 125config LOCKDEP_SUPPORT 126 bool 127 default y if SPARC64 128 129config ARCH_HIBERNATION_POSSIBLE 130 def_bool y if SPARC64 131 132config AUDIT_ARCH 133 bool 134 default y 135 136config MMU 137 bool 138 default y 139 140config HIGHMEM 141 bool 142 default y if SPARC32 143 select KMAP_LOCAL 144 145config GENERIC_ISA_DMA 146 bool 147 default y if SPARC32 148 149config PGTABLE_LEVELS 150 default 4 if 64BIT 151 default 3 152 153config ARCH_SUPPORTS_UPROBES 154 def_bool y if SPARC64 155 156menu "Processor type and features" 157 158config SMP 159 bool "Symmetric multi-processing support" 160 help 161 This enables support for systems with more than one CPU. If you have 162 a system with only one CPU, say N. If you have a system with more 163 than one CPU, say Y. 164 165 If you say N here, the kernel will run on uni- and multiprocessor 166 machines, but will use only one CPU of a multiprocessor machine. If 167 you say Y here, the kernel will run on many, but not all, 168 uniprocessor machines. On a uniprocessor machine, the kernel 169 will run faster if you say N here. 170 171 People using multiprocessor machines who say Y here should also say 172 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 173 Management" code will be disabled if you say Y here. 174 175 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 176 available at <https://www.tldp.org/docs.html#howto>. 177 178 If you don't know what to do here, say N. 179 180config NR_CPUS 181 int "Maximum number of CPUs" 182 depends on SMP 183 range 2 32 if SPARC32 184 range 2 4096 if SPARC64 185 default 32 if SPARC32 186 default 4096 if SPARC64 187 188source "kernel/Kconfig.hz" 189 190config GENERIC_HWEIGHT 191 bool 192 default y 193 194config GENERIC_CALIBRATE_DELAY 195 bool 196 default y 197 198config ARCH_MAY_HAVE_PC_FDC 199 bool 200 default y 201 202config EMULATED_CMPXCHG 203 bool 204 default y if SPARC32 205 help 206 Sparc32 does not have a CAS instruction like sparc64. cmpxchg() 207 is emulated, and therefore it is not completely atomic. 208 209# Makefile helpers 210config SPARC32_SMP 211 bool 212 default y 213 depends on SPARC32 && SMP 214 215config SPARC64_SMP 216 bool 217 default y 218 depends on SPARC64 && SMP 219 220config EARLYFB 221 bool "Support for early boot text console" 222 default y 223 depends on SPARC64 224 help 225 Say Y here to enable a faster early framebuffer boot console. 226 227config HOTPLUG_CPU 228 bool "Support for hot-pluggable CPUs" 229 depends on SPARC64 && SMP 230 help 231 Say Y here to experiment with turning CPUs off and on. CPUs 232 can be controlled through /sys/devices/system/cpu/cpu#. 233 Say N if you want to disable CPU hotplug. 234 235if SPARC64 236source "drivers/cpufreq/Kconfig" 237endif 238 239config US3_MC 240 tristate "UltraSPARC-III Memory Controller driver" 241 depends on SPARC64 242 default y 243 help 244 This adds a driver for the UltraSPARC-III memory controller. 245 Loading this driver allows exact mnemonic strings to be 246 printed in the event of a memory error, so that the faulty DIMM 247 on the motherboard can be matched to the error. 248 249 If in doubt, say Y, as this information can be very useful. 250 251# Global things across all Sun machines. 252config GENERIC_LOCKBREAK 253 bool 254 default y 255 depends on SPARC64 && SMP && PREEMPTION 256 257config NUMA 258 bool "NUMA support" 259 depends on SPARC64 && SMP 260 261config NODES_SHIFT 262 int "Maximum NUMA Nodes (as a power of 2)" 263 range 4 5 if SPARC64 264 default "5" 265 depends on NUMA 266 help 267 Specify the maximum number of NUMA Nodes available on the target 268 system. Increases memory reserved to accommodate various tables. 269 270config ARCH_SPARSEMEM_ENABLE 271 def_bool y if SPARC64 272 select SPARSEMEM_VMEMMAP_ENABLE 273 274config ARCH_SPARSEMEM_DEFAULT 275 def_bool y if SPARC64 276 277config ARCH_FORCE_MAX_ORDER 278 int "Order of maximal physically contiguous allocations" 279 default "12" 280 help 281 The kernel page allocator limits the size of maximal physically 282 contiguous allocations. The limit is called MAX_PAGE_ORDER and it 283 defines the maximal power of two of number of pages that can be 284 allocated as a single contiguous block. This option allows 285 overriding the default setting when ability to allocate very 286 large blocks of physically contiguous memory is required. 287 288 Don't change if unsure. 289 290if SPARC64 || COMPILE_TEST 291source "kernel/power/Kconfig" 292endif 293 294config SCHED_SMT 295 bool "SMT (Hyperthreading) scheduler support" 296 depends on SPARC64 && SMP 297 default y 298 help 299 SMT scheduler support improves the CPU scheduler's decision making 300 when dealing with SPARC cpus at a cost of slightly increased overhead 301 in some places. If unsure say N here. 302 303config SCHED_MC 304 bool "Multi-core scheduler support" 305 depends on SPARC64 && SMP 306 default y 307 help 308 Multi-core scheduler support improves the CPU scheduler's decision 309 making when dealing with multi-core CPU chips at a cost of slightly 310 increased overhead in some places. If unsure say N here. 311 312config CMDLINE_BOOL 313 bool "Default bootloader kernel arguments" 314 depends on SPARC64 315 316config CMDLINE 317 string "Initial kernel command string" 318 depends on CMDLINE_BOOL 319 default "console=ttyS0,9600 root=/dev/sda1" 320 help 321 Say Y here if you want to be able to pass default arguments to 322 the kernel. This will be overridden by the bootloader, if you 323 use one (such as SILO). This is most useful if you want to boot 324 a kernel from TFTP, and want default options to be available 325 with having them passed on the command line. 326 327 NOTE: This option WILL override the PROM bootargs setting! 328 329config SUN_PM 330 bool 331 default y if SPARC32 332 help 333 Enable power management and CPU standby features on supported 334 SPARC platforms. 335 336config SPARC_LED 337 tristate "Sun4m LED driver" 338 depends on SPARC32 339 help 340 This driver toggles the front-panel LED on sun4m systems 341 in a user-specifiable manner. Its state can be probed 342 by reading /proc/led and its blinking mode can be changed 343 via writes to /proc/led 344 345config SERIAL_CONSOLE 346 bool 347 depends on SPARC32 348 default y 349 help 350 If you say Y here, it will be possible to use a serial port as the 351 system console (the system console is the device which receives all 352 kernel messages and warnings and which allows logins in single user 353 mode). This could be useful if some terminal or printer is connected 354 to that serial port. 355 356 Even if you say Y here, the currently visible virtual console 357 (/dev/tty0) will still be used as the system console by default, but 358 you can alter that using a kernel command line option such as 359 "console=ttyS1". (Try "man bootparam" or see the documentation of 360 your boot loader (silo) about how to pass options to the kernel at 361 boot time.) 362 363 If you don't have a graphics card installed and you say Y here, the 364 kernel will automatically use the first serial line, /dev/ttyS0, as 365 system console. 366 367 If unsure, say N. 368 369config SPARC_LEON 370 bool "Sparc Leon processor family" 371 depends on SPARC32 372 select USB_EHCI_BIG_ENDIAN_MMIO 373 select USB_EHCI_BIG_ENDIAN_DESC 374 select USB_UHCI_BIG_ENDIAN_MMIO 375 select USB_UHCI_BIG_ENDIAN_DESC 376 help 377 If you say Y here if you are running on a SPARC-LEON processor. 378 The LEON processor is a synthesizable VHDL model of the 379 SPARC-v8 standard. LEON is part of the GRLIB collection of 380 IP cores that are distributed under GPL. GRLIB can be downloaded 381 from www.gaisler.com. You can download a sparc-linux cross-compilation 382 toolchain at www.gaisler.com. 383 384if SPARC_LEON 385menu "U-Boot options" 386 387config UBOOT_LOAD_ADDR 388 hex "uImage Load Address" 389 default 0x40004000 390 help 391 U-Boot kernel load address, the address in physical address space 392 where u-boot will place the Linux kernel before booting it. 393 This address is normally the base address of main memory + 0x4000. 394 395config UBOOT_FLASH_ADDR 396 hex "uImage.o Load Address" 397 default 0x00080000 398 help 399 Optional setting only affecting the uImage.o ELF-image used to 400 download the uImage file to the target using a ELF-loader other than 401 U-Boot. It may for example be used to download an uImage to FLASH with 402 the GRMON utility before even starting u-boot. 403 404config UBOOT_ENTRY_ADDR 405 hex "uImage Entry Address" 406 default 0xf0004000 407 help 408 Do not change this unless you know what you're doing. This is 409 hardcoded by the SPARC32 and LEON port. 410 411 This is the virtual address u-boot jumps to when booting the Linux 412 Kernel. 413 414endmenu 415endif 416 417endmenu 418 419menu "Bus options (PCI etc.)" 420config SBUS 421 bool 422 default y 423 424config SBUSCHAR 425 bool 426 default y 427 428config SUN_LDOMS 429 bool "Sun Logical Domains support" 430 depends on SPARC64 431 help 432 Say Y here is you want to support virtual devices via 433 Logical Domains. 434 435config PCIC_PCI 436 bool 437 depends on PCI && SPARC32 && !SPARC_LEON 438 default y 439 440config LEON_PCI 441 bool 442 depends on PCI && SPARC_LEON 443 default y 444 445config SPARC_GRPCI1 446 bool "GRPCI Host Bridge Support" 447 depends on LEON_PCI 448 default y 449 help 450 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI 451 PCI host controller is typically found in GRLIB SPARC32/LEON 452 systems. The driver has one property (all_pci_errors) controlled 453 from the bootloader that makes the GRPCI to generate interrupts 454 on detected PCI Parity and System errors. 455 456config SPARC_GRPCI2 457 bool "GRPCI2 Host Bridge Support" 458 depends on LEON_PCI 459 default y 460 help 461 Say Y here to include the GRPCI2 Host Bridge Driver. 462 463config SUN_OPENPROMFS 464 tristate "Openprom tree appears in /proc/openprom" 465 help 466 If you say Y, the OpenPROM device tree will be available as a 467 virtual file system, which you can mount to /proc/openprom by "mount 468 -t openpromfs none /proc/openprom". 469 470 To compile the /proc/openprom support as a module, choose M here: the 471 module will be called openpromfs. 472 473 Only choose N if you know in advance that you will not need to modify 474 OpenPROM settings on the running system. 475 476# Makefile helpers 477config SPARC64_PCI 478 bool 479 default y 480 depends on SPARC64 && PCI 481 482config SPARC64_PCI_MSI 483 bool 484 default y 485 depends on SPARC64_PCI && PCI_MSI 486 487endmenu 488 489config COMPAT 490 bool 491 depends on SPARC64 492 default y 493 select HAVE_UID16 494 select ARCH_WANT_OLD_COMPAT_IPC 495 select COMPAT_OLD_SIGACTION 496 497source "drivers/sbus/char/Kconfig" 498