1 # SPDX-License-Identifier: GPL-2.0-only 2 config 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 13 config 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 52 config 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 LOCK_MM_AND_FIND_VMA 62 select OLD_SIGACTION 63 select ZONE_DMA 64 65 config SPARC64 66 def_bool 64BIT 67 select ALTERNATE_USER_ADDRESS_SPACE 68 select HAVE_FUNCTION_TRACER 69 select HAVE_FUNCTION_GRAPH_TRACER 70 select HAVE_KRETPROBES 71 select HAVE_KPROBES 72 select MMU_GATHER_RCU_TABLE_FREE if SMP 73 select MMU_GATHER_MERGE_VMAS 74 select MMU_GATHER_NO_FLUSH_CACHE 75 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 76 select HAVE_DYNAMIC_FTRACE 77 select HAVE_FTRACE_MCOUNT_RECORD 78 select HAVE_SYSCALL_TRACEPOINTS 79 select HAVE_CONTEXT_TRACKING_USER 80 select HAVE_TIF_NOHZ 81 select HAVE_DEBUG_KMEMLEAK 82 select IOMMU_HELPER 83 select SPARSE_IRQ 84 select RTC_DRV_CMOS 85 select RTC_DRV_BQ4802 86 select RTC_DRV_SUN4V 87 select RTC_DRV_STARFIRE 88 select HAVE_PERF_EVENTS 89 select PERF_USE_VMALLOC 90 select ARCH_HAVE_NMI_SAFE_CMPXCHG 91 select HAVE_C_RECORDMCOUNT 92 select HAVE_ARCH_AUDITSYSCALL 93 select ARCH_SUPPORTS_ATOMIC_RMW 94 select ARCH_SUPPORTS_DEBUG_PAGEALLOC 95 select HAVE_NMI 96 select HAVE_REGS_AND_STACK_ACCESS_API 97 select ARCH_USE_QUEUED_RWLOCKS 98 select ARCH_USE_QUEUED_SPINLOCKS 99 select GENERIC_TIME_VSYSCALL 100 select ARCH_CLOCKSOURCE_DATA 101 select ARCH_HAS_PTE_SPECIAL 102 select PCI_DOMAINS if PCI 103 select ARCH_HAS_GIGANTIC_PAGE 104 select HAVE_SOFTIRQ_ON_OWN_STACK 105 select HAVE_SETUP_PER_CPU_AREA 106 select NEED_PER_CPU_EMBED_FIRST_CHUNK 107 select NEED_PER_CPU_PAGE_FIRST_CHUNK 108 109 config ARCH_PROC_KCORE_TEXT 110 def_bool y 111 112 config CPU_BIG_ENDIAN 113 def_bool y 114 115 config ARCH_ATU 116 bool 117 default y if SPARC64 118 119 config STACKTRACE_SUPPORT 120 bool 121 default y if SPARC64 122 123 config LOCKDEP_SUPPORT 124 bool 125 default y if SPARC64 126 127 config ARCH_HIBERNATION_POSSIBLE 128 def_bool y if SPARC64 129 130 config AUDIT_ARCH 131 bool 132 default y 133 134 config MMU 135 bool 136 default y 137 138 config HIGHMEM 139 bool 140 default y if SPARC32 141 select KMAP_LOCAL 142 143 config GENERIC_ISA_DMA 144 bool 145 default y if SPARC32 146 147 config PGTABLE_LEVELS 148 default 4 if 64BIT 149 default 3 150 151 config ARCH_SUPPORTS_UPROBES 152 def_bool y if SPARC64 153 154 menu "Processor type and features" 155 156 config SMP 157 bool "Symmetric multi-processing support" 158 help 159 This enables support for systems with more than one CPU. If you have 160 a system with only one CPU, say N. If you have a system with more 161 than one CPU, say Y. 162 163 If you say N here, the kernel will run on uni- and multiprocessor 164 machines, but will use only one CPU of a multiprocessor machine. If 165 you say Y here, the kernel will run on many, but not all, 166 uniprocessor machines. On a uniprocessor machine, the kernel 167 will run faster if you say N here. 168 169 People using multiprocessor machines who say Y here should also say 170 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 171 Management" code will be disabled if you say Y here. 172 173 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 174 available at <https://www.tldp.org/docs.html#howto>. 175 176 If you don't know what to do here, say N. 177 178 config NR_CPUS 179 int "Maximum number of CPUs" 180 depends on SMP 181 range 2 32 if SPARC32 182 range 2 4096 if SPARC64 183 default 32 if SPARC32 184 default 4096 if SPARC64 185 186 source "kernel/Kconfig.hz" 187 188 config GENERIC_HWEIGHT 189 bool 190 default y 191 192 config GENERIC_CALIBRATE_DELAY 193 bool 194 default y 195 196 config ARCH_MAY_HAVE_PC_FDC 197 bool 198 default y 199 200 config EMULATED_CMPXCHG 201 bool 202 default y if SPARC32 203 help 204 Sparc32 does not have a CAS instruction like sparc64. cmpxchg() 205 is emulated, and therefore it is not completely atomic. 206 207 # Makefile helpers 208 config SPARC32_SMP 209 bool 210 default y 211 depends on SPARC32 && SMP 212 213 config SPARC64_SMP 214 bool 215 default y 216 depends on SPARC64 && SMP 217 218 config EARLYFB 219 bool "Support for early boot text console" 220 default y 221 depends on SPARC64 222 help 223 Say Y here to enable a faster early framebuffer boot console. 224 225 config HOTPLUG_CPU 226 bool "Support for hot-pluggable CPUs" 227 depends on SPARC64 && SMP 228 help 229 Say Y here to experiment with turning CPUs off and on. CPUs 230 can be controlled through /sys/devices/system/cpu/cpu#. 231 Say N if you want to disable CPU hotplug. 232 233 if SPARC64 234 source "drivers/cpufreq/Kconfig" 235 endif 236 237 config US3_MC 238 tristate "UltraSPARC-III Memory Controller driver" 239 depends on SPARC64 240 default y 241 help 242 This adds a driver for the UltraSPARC-III memory controller. 243 Loading this driver allows exact mnemonic strings to be 244 printed in the event of a memory error, so that the faulty DIMM 245 on the motherboard can be matched to the error. 246 247 If in doubt, say Y, as this information can be very useful. 248 249 # Global things across all Sun machines. 250 config GENERIC_LOCKBREAK 251 bool 252 default y 253 depends on SPARC64 && SMP && PREEMPTION 254 255 config NUMA 256 bool "NUMA support" 257 depends on SPARC64 && SMP 258 259 config NODES_SHIFT 260 int "Maximum NUMA Nodes (as a power of 2)" 261 range 4 5 if SPARC64 262 default "5" 263 depends on NUMA 264 help 265 Specify the maximum number of NUMA Nodes available on the target 266 system. Increases memory reserved to accommodate various tables. 267 268 config ARCH_SPARSEMEM_ENABLE 269 def_bool y if SPARC64 270 select SPARSEMEM_VMEMMAP_ENABLE 271 272 config ARCH_SPARSEMEM_DEFAULT 273 def_bool y if SPARC64 274 275 config ARCH_FORCE_MAX_ORDER 276 int "Order of maximal physically contiguous allocations" 277 default "12" 278 help 279 The kernel page allocator limits the size of maximal physically 280 contiguous allocations. The limit is called MAX_ORDER and it 281 defines the maximal power of two of number of pages that can be 282 allocated as a single contiguous block. This option allows 283 overriding the default setting when ability to allocate very 284 large blocks of physically contiguous memory is required. 285 286 Don't change if unsure. 287 288 if SPARC64 || COMPILE_TEST 289 source "kernel/power/Kconfig" 290 endif 291 292 config SCHED_SMT 293 bool "SMT (Hyperthreading) scheduler support" 294 depends on SPARC64 && SMP 295 default y 296 help 297 SMT scheduler support improves the CPU scheduler's decision making 298 when dealing with SPARC cpus at a cost of slightly increased overhead 299 in some places. If unsure say N here. 300 301 config SCHED_MC 302 bool "Multi-core scheduler support" 303 depends on SPARC64 && SMP 304 default y 305 help 306 Multi-core scheduler support improves the CPU scheduler's decision 307 making when dealing with multi-core CPU chips at a cost of slightly 308 increased overhead in some places. If unsure say N here. 309 310 config CMDLINE_BOOL 311 bool "Default bootloader kernel arguments" 312 depends on SPARC64 313 314 config CMDLINE 315 string "Initial kernel command string" 316 depends on CMDLINE_BOOL 317 default "console=ttyS0,9600 root=/dev/sda1" 318 help 319 Say Y here if you want to be able to pass default arguments to 320 the kernel. This will be overridden by the bootloader, if you 321 use one (such as SILO). This is most useful if you want to boot 322 a kernel from TFTP, and want default options to be available 323 with having them passed on the command line. 324 325 NOTE: This option WILL override the PROM bootargs setting! 326 327 config SUN_PM 328 bool 329 default y if SPARC32 330 help 331 Enable power management and CPU standby features on supported 332 SPARC platforms. 333 334 config SPARC_LED 335 tristate "Sun4m LED driver" 336 depends on SPARC32 337 help 338 This driver toggles the front-panel LED on sun4m systems 339 in a user-specifiable manner. Its state can be probed 340 by reading /proc/led and its blinking mode can be changed 341 via writes to /proc/led 342 343 config SERIAL_CONSOLE 344 bool 345 depends on SPARC32 346 default y 347 help 348 If you say Y here, it will be possible to use a serial port as the 349 system console (the system console is the device which receives all 350 kernel messages and warnings and which allows logins in single user 351 mode). This could be useful if some terminal or printer is connected 352 to that serial port. 353 354 Even if you say Y here, the currently visible virtual console 355 (/dev/tty0) will still be used as the system console by default, but 356 you can alter that using a kernel command line option such as 357 "console=ttyS1". (Try "man bootparam" or see the documentation of 358 your boot loader (silo) about how to pass options to the kernel at 359 boot time.) 360 361 If you don't have a graphics card installed and you say Y here, the 362 kernel will automatically use the first serial line, /dev/ttyS0, as 363 system console. 364 365 If unsure, say N. 366 367 config SPARC_LEON 368 bool "Sparc Leon processor family" 369 depends on SPARC32 370 select USB_EHCI_BIG_ENDIAN_MMIO 371 select USB_EHCI_BIG_ENDIAN_DESC 372 select USB_UHCI_BIG_ENDIAN_MMIO 373 select USB_UHCI_BIG_ENDIAN_DESC 374 help 375 If you say Y here if you are running on a SPARC-LEON processor. 376 The LEON processor is a synthesizable VHDL model of the 377 SPARC-v8 standard. LEON is part of the GRLIB collection of 378 IP cores that are distributed under GPL. GRLIB can be downloaded 379 from www.gaisler.com. You can download a sparc-linux cross-compilation 380 toolchain at www.gaisler.com. 381 382 if SPARC_LEON 383 menu "U-Boot options" 384 385 config UBOOT_LOAD_ADDR 386 hex "uImage Load Address" 387 default 0x40004000 388 help 389 U-Boot kernel load address, the address in physical address space 390 where u-boot will place the Linux kernel before booting it. 391 This address is normally the base address of main memory + 0x4000. 392 393 config UBOOT_FLASH_ADDR 394 hex "uImage.o Load Address" 395 default 0x00080000 396 help 397 Optional setting only affecting the uImage.o ELF-image used to 398 download the uImage file to the target using a ELF-loader other than 399 U-Boot. It may for example be used to download an uImage to FLASH with 400 the GRMON utility before even starting u-boot. 401 402 config UBOOT_ENTRY_ADDR 403 hex "uImage Entry Address" 404 default 0xf0004000 405 help 406 Do not change this unless you know what you're doing. This is 407 hardcoded by the SPARC32 and LEON port. 408 409 This is the virtual address u-boot jumps to when booting the Linux 410 Kernel. 411 412 endmenu 413 endif 414 415 endmenu 416 417 menu "Bus options (PCI etc.)" 418 config SBUS 419 bool 420 default y 421 422 config SBUSCHAR 423 bool 424 default y 425 426 config SUN_LDOMS 427 bool "Sun Logical Domains support" 428 depends on SPARC64 429 help 430 Say Y here is you want to support virtual devices via 431 Logical Domains. 432 433 config PCIC_PCI 434 bool 435 depends on PCI && SPARC32 && !SPARC_LEON 436 default y 437 438 config LEON_PCI 439 bool 440 depends on PCI && SPARC_LEON 441 default y 442 443 config SPARC_GRPCI1 444 bool "GRPCI Host Bridge Support" 445 depends on LEON_PCI 446 default y 447 help 448 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI 449 PCI host controller is typically found in GRLIB SPARC32/LEON 450 systems. The driver has one property (all_pci_errors) controlled 451 from the bootloader that makes the GRPCI to generate interrupts 452 on detected PCI Parity and System errors. 453 454 config SPARC_GRPCI2 455 bool "GRPCI2 Host Bridge Support" 456 depends on LEON_PCI 457 default y 458 help 459 Say Y here to include the GRPCI2 Host Bridge Driver. 460 461 config SUN_OPENPROMFS 462 tristate "Openprom tree appears in /proc/openprom" 463 help 464 If you say Y, the OpenPROM device tree will be available as a 465 virtual file system, which you can mount to /proc/openprom by "mount 466 -t openpromfs none /proc/openprom". 467 468 To compile the /proc/openprom support as a module, choose M here: the 469 module will be called openpromfs. 470 471 Only choose N if you know in advance that you will not need to modify 472 OpenPROM settings on the running system. 473 474 # Makefile helpers 475 config SPARC64_PCI 476 bool 477 default y 478 depends on SPARC64 && PCI 479 480 config SPARC64_PCI_MSI 481 bool 482 default y 483 depends on SPARC64_PCI && PCI_MSI 484 485 endmenu 486 487 config COMPAT 488 bool 489 depends on SPARC64 490 default y 491 select HAVE_UID16 492 select ARCH_WANT_OLD_COMPAT_IPC 493 select COMPAT_OLD_SIGACTION 494 495 source "drivers/sbus/char/Kconfig" 496