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_HAS_DMA_OPS 18 select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI 19 select ARCH_MIGHT_HAVE_PC_SERIO 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 GENERIC_LIB_CMPDI2 62 select GENERIC_LIB_UCMPDI2 63 select HAVE_UID16 64 select HAVE_PAGE_SIZE_4KB 65 select LOCK_MM_AND_FIND_VMA 66 select OLD_SIGACTION 67 select ZONE_DMA 68 69config SPARC64 70 def_bool 64BIT 71 select ALTERNATE_USER_ADDRESS_SPACE 72 select HAVE_FUNCTION_TRACER 73 select HAVE_FUNCTION_GRAPH_TRACER 74 select HAVE_KRETPROBES 75 select HAVE_KPROBES 76 select MMU_GATHER_RCU_TABLE_FREE if SMP 77 select MMU_GATHER_MERGE_VMAS 78 select MMU_GATHER_NO_FLUSH_CACHE 79 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 80 select HAVE_DYNAMIC_FTRACE 81 select HAVE_FTRACE_MCOUNT_RECORD 82 select HAVE_PAGE_SIZE_8KB 83 select HAVE_SYSCALL_TRACEPOINTS 84 select HAVE_CONTEXT_TRACKING_USER 85 select HAVE_TIF_NOHZ 86 select HAVE_DEBUG_KMEMLEAK 87 select IOMMU_HELPER 88 select SPARSE_IRQ 89 select RTC_DRV_CMOS 90 select RTC_DRV_BQ4802 91 select RTC_DRV_SUN4V 92 select RTC_DRV_STARFIRE 93 select HAVE_PERF_EVENTS 94 select PERF_USE_VMALLOC 95 select ARCH_HAVE_NMI_SAFE_CMPXCHG 96 select HAVE_C_RECORDMCOUNT 97 select HAVE_ARCH_AUDITSYSCALL 98 select ARCH_SUPPORTS_ATOMIC_RMW 99 select ARCH_SUPPORTS_DEBUG_PAGEALLOC 100 select HAVE_NMI 101 select HAVE_REGS_AND_STACK_ACCESS_API 102 select ARCH_USE_QUEUED_RWLOCKS 103 select ARCH_USE_QUEUED_SPINLOCKS 104 select GENERIC_TIME_VSYSCALL 105 select ARCH_CLOCKSOURCE_DATA 106 select ARCH_HAS_PTE_SPECIAL 107 select PCI_DOMAINS if PCI 108 select ARCH_HAS_GIGANTIC_PAGE 109 select HAVE_SOFTIRQ_ON_OWN_STACK 110 select HAVE_SETUP_PER_CPU_AREA 111 select NEED_PER_CPU_EMBED_FIRST_CHUNK 112 select NEED_PER_CPU_PAGE_FIRST_CHUNK 113 114config ARCH_PROC_KCORE_TEXT 115 def_bool y 116 117config CPU_BIG_ENDIAN 118 def_bool y 119 120config STACKTRACE_SUPPORT 121 bool 122 default y if SPARC64 123 124config LOCKDEP_SUPPORT 125 bool 126 default y if SPARC64 127 128config ARCH_HIBERNATION_POSSIBLE 129 def_bool y if SPARC64 130 131config AUDIT_ARCH 132 bool 133 default y 134 135config MMU 136 bool 137 default y 138 139config HIGHMEM 140 bool 141 default y if SPARC32 142 select KMAP_LOCAL 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 select FONT_SUN8x16 220 select FONT_SUPPORT 221 help 222 Say Y here to enable a faster early framebuffer boot console. 223 224config HOTPLUG_CPU 225 bool "Support for hot-pluggable CPUs" 226 depends on SPARC64 && SMP 227 help 228 Say Y here to experiment with turning CPUs off and on. CPUs 229 can be controlled through /sys/devices/system/cpu/cpu#. 230 Say N if you want to disable CPU hotplug. 231 232if SPARC64 233source "drivers/cpufreq/Kconfig" 234endif 235 236config US3_MC 237 tristate "UltraSPARC-III Memory Controller driver" 238 depends on SPARC64 239 default y 240 help 241 This adds a driver for the UltraSPARC-III memory controller. 242 Loading this driver allows exact mnemonic strings to be 243 printed in the event of a memory error, so that the faulty DIMM 244 on the motherboard can be matched to the error. 245 246 If in doubt, say Y, as this information can be very useful. 247 248# Global things across all Sun machines. 249config GENERIC_LOCKBREAK 250 bool 251 default y 252 depends on SPARC64 && SMP && PREEMPTION 253 254config NUMA 255 bool "NUMA support" 256 depends on SPARC64 && SMP 257 258config NODES_SHIFT 259 int "Maximum NUMA Nodes (as a power of 2)" 260 range 4 5 if SPARC64 261 default "5" 262 depends on NUMA 263 help 264 Specify the maximum number of NUMA Nodes available on the target 265 system. Increases memory reserved to accommodate various tables. 266 267config ARCH_SPARSEMEM_ENABLE 268 def_bool y if SPARC64 269 select SPARSEMEM_VMEMMAP_ENABLE 270 271config ARCH_SPARSEMEM_DEFAULT 272 def_bool y if SPARC64 273 274config ARCH_FORCE_MAX_ORDER 275 int "Order of maximal physically contiguous allocations" 276 default "12" 277 help 278 The kernel page allocator limits the size of maximal physically 279 contiguous allocations. The limit is called MAX_PAGE_ORDER and it 280 defines the maximal power of two of number of pages that can be 281 allocated as a single contiguous block. This option allows 282 overriding the default setting when ability to allocate very 283 large blocks of physically contiguous memory is required. 284 285 Don't change if unsure. 286 287if SPARC64 || COMPILE_TEST 288source "kernel/power/Kconfig" 289endif 290 291config SCHED_SMT 292 bool "SMT (Hyperthreading) scheduler support" 293 depends on SPARC64 && SMP 294 default y 295 help 296 SMT scheduler support improves the CPU scheduler's decision making 297 when dealing with SPARC cpus at a cost of slightly increased overhead 298 in some places. If unsure say N here. 299 300config SCHED_MC 301 bool "Multi-core scheduler support" 302 depends on SPARC64 && SMP 303 default y 304 help 305 Multi-core scheduler support improves the CPU scheduler's decision 306 making when dealing with multi-core CPU chips at a cost of slightly 307 increased overhead in some places. If unsure say N here. 308 309config CMDLINE_BOOL 310 bool "Default bootloader kernel arguments" 311 depends on SPARC64 312 313config CMDLINE 314 string "Initial kernel command string" 315 depends on CMDLINE_BOOL 316 default "console=ttyS0,9600 root=/dev/sda1" 317 help 318 Say Y here if you want to be able to pass default arguments to 319 the kernel. This will be overridden by the bootloader, if you 320 use one (such as SILO). This is most useful if you want to boot 321 a kernel from TFTP, and want default options to be available 322 with having them passed on the command line. 323 324 NOTE: This option WILL override the PROM bootargs setting! 325 326config SUN_PM 327 bool 328 default y if SPARC32 329 help 330 Enable power management and CPU standby features on supported 331 SPARC platforms. 332 333config SPARC_LED 334 tristate "Sun4m LED driver" 335 depends on SPARC32 336 help 337 This driver toggles the front-panel LED on sun4m systems 338 in a user-specifiable manner. Its state can be probed 339 by reading /proc/led and its blinking mode can be changed 340 via writes to /proc/led 341 342config SERIAL_CONSOLE 343 bool 344 depends on SPARC32 345 default y 346 help 347 If you say Y here, it will be possible to use a serial port as the 348 system console (the system console is the device which receives all 349 kernel messages and warnings and which allows logins in single user 350 mode). This could be useful if some terminal or printer is connected 351 to that serial port. 352 353 Even if you say Y here, the currently visible virtual console 354 (/dev/tty0) will still be used as the system console by default, but 355 you can alter that using a kernel command line option such as 356 "console=ttyS1". (Try "man bootparam" or see the documentation of 357 your boot loader (silo) about how to pass options to the kernel at 358 boot time.) 359 360 If you don't have a graphics card installed and you say Y here, the 361 kernel will automatically use the first serial line, /dev/ttyS0, as 362 system console. 363 364 If unsure, say N. 365 366config SPARC_LEON 367 bool "Sparc Leon processor family" 368 depends on SPARC32 369 select USB_EHCI_BIG_ENDIAN_MMIO 370 select USB_EHCI_BIG_ENDIAN_DESC 371 select USB_UHCI_BIG_ENDIAN_MMIO 372 select USB_UHCI_BIG_ENDIAN_DESC 373 help 374 If you say Y here if you are running on a SPARC-LEON processor. 375 The LEON processor is a synthesizable VHDL model of the 376 SPARC-v8 standard. LEON is part of the GRLIB collection of 377 IP cores that are distributed under GPL. GRLIB can be downloaded 378 from www.gaisler.com. You can download a sparc-linux cross-compilation 379 toolchain at www.gaisler.com. 380 381if SPARC_LEON 382menu "U-Boot options" 383 384config UBOOT_LOAD_ADDR 385 hex "uImage Load Address" 386 default 0x40004000 387 help 388 U-Boot kernel load address, the address in physical address space 389 where u-boot will place the Linux kernel before booting it. 390 This address is normally the base address of main memory + 0x4000. 391 392config UBOOT_FLASH_ADDR 393 hex "uImage.o Load Address" 394 default 0x00080000 395 help 396 Optional setting only affecting the uImage.o ELF-image used to 397 download the uImage file to the target using a ELF-loader other than 398 U-Boot. It may for example be used to download an uImage to FLASH with 399 the GRMON utility before even starting u-boot. 400 401config UBOOT_ENTRY_ADDR 402 hex "uImage Entry Address" 403 default 0xf0004000 404 help 405 Do not change this unless you know what you're doing. This is 406 hardcoded by the SPARC32 and LEON port. 407 408 This is the virtual address u-boot jumps to when booting the Linux 409 Kernel. 410 411endmenu 412endif 413 414endmenu 415 416menu "Bus options (PCI etc.)" 417config SBUS 418 bool 419 default y 420 421config SBUSCHAR 422 bool 423 default y 424 425config SUN_LDOMS 426 bool "Sun Logical Domains support" 427 depends on SPARC64 428 help 429 Say Y here is you want to support virtual devices via 430 Logical Domains. 431 432config PCIC_PCI 433 bool 434 depends on PCI && SPARC32 && !SPARC_LEON 435 default y 436 437config LEON_PCI 438 bool 439 depends on PCI && SPARC_LEON 440 default y 441 442config SPARC_GRPCI1 443 bool "GRPCI Host Bridge Support" 444 depends on LEON_PCI 445 default y 446 help 447 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI 448 PCI host controller is typically found in GRLIB SPARC32/LEON 449 systems. The driver has one property (all_pci_errors) controlled 450 from the bootloader that makes the GRPCI to generate interrupts 451 on detected PCI Parity and System errors. 452 453config SPARC_GRPCI2 454 bool "GRPCI2 Host Bridge Support" 455 depends on LEON_PCI 456 default y 457 help 458 Say Y here to include the GRPCI2 Host Bridge Driver. 459 460config SUN_OPENPROMFS 461 tristate "Openprom tree appears in /proc/openprom" 462 help 463 If you say Y, the OpenPROM device tree will be available as a 464 virtual file system, which you can mount to /proc/openprom by "mount 465 -t openpromfs none /proc/openprom". 466 467 To compile the /proc/openprom support as a module, choose M here: the 468 module will be called openpromfs. 469 470 Only choose N if you know in advance that you will not need to modify 471 OpenPROM settings on the running system. 472 473# Makefile helpers 474config SPARC64_PCI 475 bool 476 default y 477 depends on SPARC64 && PCI 478 479config SPARC64_PCI_MSI 480 bool 481 default y 482 depends on SPARC64_PCI && PCI_MSI 483 484endmenu 485 486config COMPAT 487 bool 488 depends on SPARC64 489 default y 490 select HAVE_UID16 491 select ARCH_WANT_OLD_COMPAT_IPC 492 select COMPAT_OLD_SIGACTION 493 494source "drivers/sbus/char/Kconfig" 495