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_PAGE_SIZE_8KB 82 select HAVE_SYSCALL_TRACEPOINTS 83 select HAVE_CONTEXT_TRACKING_USER 84 select HAVE_TIF_NOHZ 85 select HAVE_DEBUG_KMEMLEAK 86 select IOMMU_HELPER 87 select SPARSE_IRQ 88 select RTC_DRV_CMOS 89 select RTC_DRV_BQ4802 90 select RTC_DRV_SUN4V 91 select RTC_DRV_STARFIRE 92 select HAVE_PERF_EVENTS 93 select PERF_USE_VMALLOC 94 select ARCH_HAVE_NMI_SAFE_CMPXCHG 95 select HAVE_C_RECORDMCOUNT 96 select HAVE_ARCH_AUDITSYSCALL 97 select ARCH_SUPPORTS_ATOMIC_RMW 98 select ARCH_SUPPORTS_DEBUG_PAGEALLOC 99 select HAVE_NMI 100 select HAVE_REGS_AND_STACK_ACCESS_API 101 select ARCH_USE_QUEUED_RWLOCKS 102 select ARCH_USE_QUEUED_SPINLOCKS 103 select GENERIC_TIME_VSYSCALL 104 select ARCH_CLOCKSOURCE_DATA 105 select ARCH_HAS_PTE_SPECIAL 106 select PCI_DOMAINS if PCI 107 select ARCH_HAS_GIGANTIC_PAGE 108 select HAVE_SOFTIRQ_ON_OWN_STACK 109 select HAVE_SETUP_PER_CPU_AREA 110 select NEED_PER_CPU_EMBED_FIRST_CHUNK 111 select NEED_PER_CPU_PAGE_FIRST_CHUNK 112 113config ARCH_PROC_KCORE_TEXT 114 def_bool y 115 116config CPU_BIG_ENDIAN 117 def_bool y 118 119config STACKTRACE_SUPPORT 120 bool 121 default y if SPARC64 122 123config LOCKDEP_SUPPORT 124 bool 125 default y if SPARC64 126 127config ARCH_HIBERNATION_POSSIBLE 128 def_bool y if SPARC64 129 130config AUDIT_ARCH 131 bool 132 default y 133 134config MMU 135 bool 136 default y 137 138config HIGHMEM 139 bool 140 default y if SPARC32 141 select KMAP_LOCAL 142 143config PGTABLE_LEVELS 144 default 4 if 64BIT 145 default 3 146 147config ARCH_SUPPORTS_UPROBES 148 def_bool y if SPARC64 149 150menu "Processor type and features" 151 152config SMP 153 bool "Symmetric multi-processing support" 154 help 155 This enables support for systems with more than one CPU. If you have 156 a system with only one CPU, say N. If you have a system with more 157 than one CPU, say Y. 158 159 If you say N here, the kernel will run on uni- and multiprocessor 160 machines, but will use only one CPU of a multiprocessor machine. If 161 you say Y here, the kernel will run on many, but not all, 162 uniprocessor machines. On a uniprocessor machine, the kernel 163 will run faster if you say N here. 164 165 People using multiprocessor machines who say Y here should also say 166 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 167 Management" code will be disabled if you say Y here. 168 169 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 170 available at <https://www.tldp.org/docs.html#howto>. 171 172 If you don't know what to do here, say N. 173 174config NR_CPUS 175 int "Maximum number of CPUs" 176 depends on SMP 177 range 2 32 if SPARC32 178 range 2 4096 if SPARC64 179 default 32 if SPARC32 180 default 4096 if SPARC64 181 182source "kernel/Kconfig.hz" 183 184config GENERIC_HWEIGHT 185 bool 186 default y 187 188config GENERIC_CALIBRATE_DELAY 189 bool 190 default y 191 192config ARCH_MAY_HAVE_PC_FDC 193 bool 194 default y 195 196config EMULATED_CMPXCHG 197 bool 198 default y if SPARC32 199 help 200 Sparc32 does not have a CAS instruction like sparc64. cmpxchg() 201 is emulated, and therefore it is not completely atomic. 202 203# Makefile helpers 204config SPARC32_SMP 205 bool 206 default y 207 depends on SPARC32 && SMP 208 209config SPARC64_SMP 210 bool 211 default y 212 depends on SPARC64 && SMP 213 214config EARLYFB 215 bool "Support for early boot text console" 216 default y 217 depends on SPARC64 218 select FONT_SUN8x16 219 select FONT_SUPPORT 220 help 221 Say Y here to enable a faster early framebuffer boot console. 222 223config HOTPLUG_CPU 224 bool "Support for hot-pluggable CPUs" 225 depends on SPARC64 && SMP 226 help 227 Say Y here to experiment with turning CPUs off and on. CPUs 228 can be controlled through /sys/devices/system/cpu/cpu#. 229 Say N if you want to disable CPU hotplug. 230 231if SPARC64 232source "drivers/cpufreq/Kconfig" 233endif 234 235config US3_MC 236 tristate "UltraSPARC-III Memory Controller driver" 237 depends on SPARC64 238 default y 239 help 240 This adds a driver for the UltraSPARC-III memory controller. 241 Loading this driver allows exact mnemonic strings to be 242 printed in the event of a memory error, so that the faulty DIMM 243 on the motherboard can be matched to the error. 244 245 If in doubt, say Y, as this information can be very useful. 246 247# Global things across all Sun machines. 248config GENERIC_LOCKBREAK 249 bool 250 default y 251 depends on SPARC64 && SMP && PREEMPTION 252 253config NUMA 254 bool "NUMA support" 255 depends on SPARC64 && SMP 256 257config NODES_SHIFT 258 int "Maximum NUMA Nodes (as a power of 2)" 259 range 4 5 if SPARC64 260 default "5" 261 depends on NUMA 262 help 263 Specify the maximum number of NUMA Nodes available on the target 264 system. Increases memory reserved to accommodate various tables. 265 266config ARCH_SPARSEMEM_ENABLE 267 def_bool y if SPARC64 268 select SPARSEMEM_VMEMMAP_ENABLE 269 270config ARCH_SPARSEMEM_DEFAULT 271 def_bool y if SPARC64 272 273config ARCH_FORCE_MAX_ORDER 274 int "Order of maximal physically contiguous allocations" 275 default "12" 276 help 277 The kernel page allocator limits the size of maximal physically 278 contiguous allocations. The limit is called MAX_PAGE_ORDER and it 279 defines the maximal power of two of number of pages that can be 280 allocated as a single contiguous block. This option allows 281 overriding the default setting when ability to allocate very 282 large blocks of physically contiguous memory is required. 283 284 Don't change if unsure. 285 286if SPARC64 || COMPILE_TEST 287source "kernel/power/Kconfig" 288endif 289 290config SCHED_SMT 291 bool "SMT (Hyperthreading) scheduler support" 292 depends on SPARC64 && SMP 293 default y 294 help 295 SMT scheduler support improves the CPU scheduler's decision making 296 when dealing with SPARC cpus at a cost of slightly increased overhead 297 in some places. If unsure say N here. 298 299config SCHED_MC 300 bool "Multi-core scheduler support" 301 depends on SPARC64 && SMP 302 default y 303 help 304 Multi-core scheduler support improves the CPU scheduler's decision 305 making when dealing with multi-core CPU chips at a cost of slightly 306 increased overhead in some places. If unsure say N here. 307 308config CMDLINE_BOOL 309 bool "Default bootloader kernel arguments" 310 depends on SPARC64 311 312config CMDLINE 313 string "Initial kernel command string" 314 depends on CMDLINE_BOOL 315 default "console=ttyS0,9600 root=/dev/sda1" 316 help 317 Say Y here if you want to be able to pass default arguments to 318 the kernel. This will be overridden by the bootloader, if you 319 use one (such as SILO). This is most useful if you want to boot 320 a kernel from TFTP, and want default options to be available 321 with having them passed on the command line. 322 323 NOTE: This option WILL override the PROM bootargs setting! 324 325config SUN_PM 326 bool 327 default y if SPARC32 328 help 329 Enable power management and CPU standby features on supported 330 SPARC platforms. 331 332config SPARC_LED 333 tristate "Sun4m LED driver" 334 depends on SPARC32 335 help 336 This driver toggles the front-panel LED on sun4m systems 337 in a user-specifiable manner. Its state can be probed 338 by reading /proc/led and its blinking mode can be changed 339 via writes to /proc/led 340 341config SERIAL_CONSOLE 342 bool 343 depends on SPARC32 344 default y 345 help 346 If you say Y here, it will be possible to use a serial port as the 347 system console (the system console is the device which receives all 348 kernel messages and warnings and which allows logins in single user 349 mode). This could be useful if some terminal or printer is connected 350 to that serial port. 351 352 Even if you say Y here, the currently visible virtual console 353 (/dev/tty0) will still be used as the system console by default, but 354 you can alter that using a kernel command line option such as 355 "console=ttyS1". (Try "man bootparam" or see the documentation of 356 your boot loader (silo) about how to pass options to the kernel at 357 boot time.) 358 359 If you don't have a graphics card installed and you say Y here, the 360 kernel will automatically use the first serial line, /dev/ttyS0, as 361 system console. 362 363 If unsure, say N. 364 365config SPARC_LEON 366 bool "Sparc Leon processor family" 367 depends on SPARC32 368 select USB_EHCI_BIG_ENDIAN_MMIO 369 select USB_EHCI_BIG_ENDIAN_DESC 370 select USB_UHCI_BIG_ENDIAN_MMIO 371 select USB_UHCI_BIG_ENDIAN_DESC 372 help 373 If you say Y here if you are running on a SPARC-LEON processor. 374 The LEON processor is a synthesizable VHDL model of the 375 SPARC-v8 standard. LEON is part of the GRLIB collection of 376 IP cores that are distributed under GPL. GRLIB can be downloaded 377 from www.gaisler.com. You can download a sparc-linux cross-compilation 378 toolchain at www.gaisler.com. 379 380if SPARC_LEON 381menu "U-Boot options" 382 383config UBOOT_LOAD_ADDR 384 hex "uImage Load Address" 385 default 0x40004000 386 help 387 U-Boot kernel load address, the address in physical address space 388 where u-boot will place the Linux kernel before booting it. 389 This address is normally the base address of main memory + 0x4000. 390 391config UBOOT_FLASH_ADDR 392 hex "uImage.o Load Address" 393 default 0x00080000 394 help 395 Optional setting only affecting the uImage.o ELF-image used to 396 download the uImage file to the target using a ELF-loader other than 397 U-Boot. It may for example be used to download an uImage to FLASH with 398 the GRMON utility before even starting u-boot. 399 400config UBOOT_ENTRY_ADDR 401 hex "uImage Entry Address" 402 default 0xf0004000 403 help 404 Do not change this unless you know what you're doing. This is 405 hardcoded by the SPARC32 and LEON port. 406 407 This is the virtual address u-boot jumps to when booting the Linux 408 Kernel. 409 410endmenu 411endif 412 413endmenu 414 415menu "Bus options (PCI etc.)" 416config SBUS 417 bool 418 default y 419 420config SBUSCHAR 421 bool 422 default y 423 424config SUN_LDOMS 425 bool "Sun Logical Domains support" 426 depends on SPARC64 427 help 428 Say Y here is you want to support virtual devices via 429 Logical Domains. 430 431config PCIC_PCI 432 bool 433 depends on PCI && SPARC32 && !SPARC_LEON 434 default y 435 436config LEON_PCI 437 bool 438 depends on PCI && SPARC_LEON 439 default y 440 441config SPARC_GRPCI1 442 bool "GRPCI Host Bridge Support" 443 depends on LEON_PCI 444 default y 445 help 446 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI 447 PCI host controller is typically found in GRLIB SPARC32/LEON 448 systems. The driver has one property (all_pci_errors) controlled 449 from the bootloader that makes the GRPCI to generate interrupts 450 on detected PCI Parity and System errors. 451 452config SPARC_GRPCI2 453 bool "GRPCI2 Host Bridge Support" 454 depends on LEON_PCI 455 default y 456 help 457 Say Y here to include the GRPCI2 Host Bridge Driver. 458 459config SUN_OPENPROMFS 460 tristate "Openprom tree appears in /proc/openprom" 461 help 462 If you say Y, the OpenPROM device tree will be available as a 463 virtual file system, which you can mount to /proc/openprom by "mount 464 -t openpromfs none /proc/openprom". 465 466 To compile the /proc/openprom support as a module, choose M here: the 467 module will be called openpromfs. 468 469 Only choose N if you know in advance that you will not need to modify 470 OpenPROM settings on the running system. 471 472# Makefile helpers 473config SPARC64_PCI 474 bool 475 default y 476 depends on SPARC64 && PCI 477 478config SPARC64_PCI_MSI 479 bool 480 default y 481 depends on SPARC64_PCI && PCI_MSI 482 483endmenu 484 485config COMPAT 486 bool 487 depends on SPARC64 488 default y 489 select HAVE_UID16 490 select ARCH_WANT_OLD_COMPAT_IPC 491 select COMPAT_OLD_SIGACTION 492 493source "drivers/sbus/char/Kconfig" 494