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 "Order of maximal physically contiguous allocations" 274 default "12" 275 help 276 The kernel page allocator limits the size of maximal physically 277 contiguous allocations. The limit is called MAX_ORDER and it 278 defines the maximal power of two of number of pages that can be 279 allocated as a single contiguous block. This option allows 280 overriding the default setting when ability to allocate very 281 large blocks of physically contiguous memory is required. 282 283 Don't change if unsure. 284 285if SPARC64 || COMPILE_TEST 286source "kernel/power/Kconfig" 287endif 288 289config SCHED_SMT 290 bool "SMT (Hyperthreading) scheduler support" 291 depends on SPARC64 && SMP 292 default y 293 help 294 SMT scheduler support improves the CPU scheduler's decision making 295 when dealing with SPARC cpus at a cost of slightly increased overhead 296 in some places. If unsure say N here. 297 298config SCHED_MC 299 bool "Multi-core scheduler support" 300 depends on SPARC64 && SMP 301 default y 302 help 303 Multi-core scheduler support improves the CPU scheduler's decision 304 making when dealing with multi-core CPU chips at a cost of slightly 305 increased overhead in some places. If unsure say N here. 306 307config CMDLINE_BOOL 308 bool "Default bootloader kernel arguments" 309 depends on SPARC64 310 311config CMDLINE 312 string "Initial kernel command string" 313 depends on CMDLINE_BOOL 314 default "console=ttyS0,9600 root=/dev/sda1" 315 help 316 Say Y here if you want to be able to pass default arguments to 317 the kernel. This will be overridden by the bootloader, if you 318 use one (such as SILO). This is most useful if you want to boot 319 a kernel from TFTP, and want default options to be available 320 with having them passed on the command line. 321 322 NOTE: This option WILL override the PROM bootargs setting! 323 324config SUN_PM 325 bool 326 default y if SPARC32 327 help 328 Enable power management and CPU standby features on supported 329 SPARC platforms. 330 331config SPARC_LED 332 tristate "Sun4m LED driver" 333 depends on SPARC32 334 help 335 This driver toggles the front-panel LED on sun4m systems 336 in a user-specifiable manner. Its state can be probed 337 by reading /proc/led and its blinking mode can be changed 338 via writes to /proc/led 339 340config SERIAL_CONSOLE 341 bool 342 depends on SPARC32 343 default y 344 help 345 If you say Y here, it will be possible to use a serial port as the 346 system console (the system console is the device which receives all 347 kernel messages and warnings and which allows logins in single user 348 mode). This could be useful if some terminal or printer is connected 349 to that serial port. 350 351 Even if you say Y here, the currently visible virtual console 352 (/dev/tty0) will still be used as the system console by default, but 353 you can alter that using a kernel command line option such as 354 "console=ttyS1". (Try "man bootparam" or see the documentation of 355 your boot loader (silo) about how to pass options to the kernel at 356 boot time.) 357 358 If you don't have a graphics card installed and you say Y here, the 359 kernel will automatically use the first serial line, /dev/ttyS0, as 360 system console. 361 362 If unsure, say N. 363 364config SPARC_LEON 365 bool "Sparc Leon processor family" 366 depends on SPARC32 367 select USB_EHCI_BIG_ENDIAN_MMIO 368 select USB_EHCI_BIG_ENDIAN_DESC 369 select USB_UHCI_BIG_ENDIAN_MMIO 370 select USB_UHCI_BIG_ENDIAN_DESC 371 help 372 If you say Y here if you are running on a SPARC-LEON processor. 373 The LEON processor is a synthesizable VHDL model of the 374 SPARC-v8 standard. LEON is part of the GRLIB collection of 375 IP cores that are distributed under GPL. GRLIB can be downloaded 376 from www.gaisler.com. You can download a sparc-linux cross-compilation 377 toolchain at www.gaisler.com. 378 379if SPARC_LEON 380menu "U-Boot options" 381 382config UBOOT_LOAD_ADDR 383 hex "uImage Load Address" 384 default 0x40004000 385 help 386 U-Boot kernel load address, the address in physical address space 387 where u-boot will place the Linux kernel before booting it. 388 This address is normally the base address of main memory + 0x4000. 389 390config UBOOT_FLASH_ADDR 391 hex "uImage.o Load Address" 392 default 0x00080000 393 help 394 Optional setting only affecting the uImage.o ELF-image used to 395 download the uImage file to the target using a ELF-loader other than 396 U-Boot. It may for example be used to download an uImage to FLASH with 397 the GRMON utility before even starting u-boot. 398 399config UBOOT_ENTRY_ADDR 400 hex "uImage Entry Address" 401 default 0xf0004000 402 help 403 Do not change this unless you know what you're doing. This is 404 hardcoded by the SPARC32 and LEON port. 405 406 This is the virtual address u-boot jumps to when booting the Linux 407 Kernel. 408 409endmenu 410endif 411 412endmenu 413 414menu "Bus options (PCI etc.)" 415config SBUS 416 bool 417 default y 418 419config SBUSCHAR 420 bool 421 default y 422 423config SUN_LDOMS 424 bool "Sun Logical Domains support" 425 depends on SPARC64 426 help 427 Say Y here is you want to support virtual devices via 428 Logical Domains. 429 430config PCIC_PCI 431 bool 432 depends on PCI && SPARC32 && !SPARC_LEON 433 default y 434 435config LEON_PCI 436 bool 437 depends on PCI && SPARC_LEON 438 default y 439 440config SPARC_GRPCI1 441 bool "GRPCI Host Bridge Support" 442 depends on LEON_PCI 443 default y 444 help 445 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI 446 PCI host controller is typically found in GRLIB SPARC32/LEON 447 systems. The driver has one property (all_pci_errors) controlled 448 from the bootloader that makes the GRPCI to generate interrupts 449 on detected PCI Parity and System errors. 450 451config SPARC_GRPCI2 452 bool "GRPCI2 Host Bridge Support" 453 depends on LEON_PCI 454 default y 455 help 456 Say Y here to include the GRPCI2 Host Bridge Driver. 457 458config SUN_OPENPROMFS 459 tristate "Openprom tree appears in /proc/openprom" 460 help 461 If you say Y, the OpenPROM device tree will be available as a 462 virtual file system, which you can mount to /proc/openprom by "mount 463 -t openpromfs none /proc/openprom". 464 465 To compile the /proc/openprom support as a module, choose M here: the 466 module will be called openpromfs. 467 468 Only choose N if you know in advance that you will not need to modify 469 OpenPROM settings on the running system. 470 471# Makefile helpers 472config SPARC64_PCI 473 bool 474 default y 475 depends on SPARC64 && PCI 476 477config SPARC64_PCI_MSI 478 bool 479 default y 480 depends on SPARC64_PCI && PCI_MSI 481 482endmenu 483 484config COMPAT 485 bool 486 depends on SPARC64 487 default y 488 select HAVE_UID16 489 select ARCH_WANT_OLD_COMPAT_IPC 490 select COMPAT_OLD_SIGACTION 491 492source "drivers/sbus/char/Kconfig" 493