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_NMI_WATCHDOG 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_SYNC_DMA_FOR_CPU 56 select CLZ_TAB 57 select DMA_DIRECT_REMAP 58 select GENERIC_ATOMIC64 59 select HAVE_UID16 60 select OLD_SIGACTION 61 select ZONE_DMA 62 63config SPARC64 64 def_bool 64BIT 65 select ALTERNATE_USER_ADDRESS_SPACE 66 select HAVE_FUNCTION_TRACER 67 select HAVE_FUNCTION_GRAPH_TRACER 68 select HAVE_KRETPROBES 69 select HAVE_KPROBES 70 select MMU_GATHER_RCU_TABLE_FREE if SMP 71 select MMU_GATHER_MERGE_VMAS 72 select MMU_GATHER_NO_FLUSH_CACHE 73 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 74 select HAVE_DYNAMIC_FTRACE 75 select HAVE_FTRACE_MCOUNT_RECORD 76 select HAVE_SYSCALL_TRACEPOINTS 77 select HAVE_CONTEXT_TRACKING_USER 78 select HAVE_TIF_NOHZ 79 select HAVE_DEBUG_KMEMLEAK 80 select IOMMU_HELPER 81 select SPARSE_IRQ 82 select RTC_DRV_CMOS 83 select RTC_DRV_BQ4802 84 select RTC_DRV_SUN4V 85 select RTC_DRV_STARFIRE 86 select HAVE_PERF_EVENTS 87 select PERF_USE_VMALLOC 88 select ARCH_HAVE_NMI_SAFE_CMPXCHG 89 select HAVE_C_RECORDMCOUNT 90 select HAVE_ARCH_AUDITSYSCALL 91 select ARCH_SUPPORTS_ATOMIC_RMW 92 select ARCH_SUPPORTS_DEBUG_PAGEALLOC 93 select HAVE_NMI 94 select HAVE_REGS_AND_STACK_ACCESS_API 95 select ARCH_USE_QUEUED_RWLOCKS 96 select ARCH_USE_QUEUED_SPINLOCKS 97 select GENERIC_TIME_VSYSCALL 98 select ARCH_CLOCKSOURCE_DATA 99 select ARCH_HAS_PTE_SPECIAL 100 select PCI_DOMAINS if PCI 101 select ARCH_HAS_GIGANTIC_PAGE 102 select HAVE_SOFTIRQ_ON_OWN_STACK 103 select HAVE_SETUP_PER_CPU_AREA 104 select NEED_PER_CPU_EMBED_FIRST_CHUNK 105 select NEED_PER_CPU_PAGE_FIRST_CHUNK 106 107config ARCH_PROC_KCORE_TEXT 108 def_bool y 109 110config CPU_BIG_ENDIAN 111 def_bool y 112 113config ARCH_ATU 114 bool 115 default y if SPARC64 116 117config STACKTRACE_SUPPORT 118 bool 119 default y if SPARC64 120 121config LOCKDEP_SUPPORT 122 bool 123 default y if SPARC64 124 125config ARCH_HIBERNATION_POSSIBLE 126 def_bool y if SPARC64 127 128config AUDIT_ARCH 129 bool 130 default y 131 132config MMU 133 bool 134 default y 135 136config HIGHMEM 137 bool 138 default y if SPARC32 139 select KMAP_LOCAL 140 141config GENERIC_ISA_DMA 142 bool 143 default y if SPARC32 144 145config PGTABLE_LEVELS 146 default 4 if 64BIT 147 default 3 148 149config ARCH_SUPPORTS_UPROBES 150 def_bool y if SPARC64 151 152menu "Processor type and features" 153 154config SMP 155 bool "Symmetric multi-processing support" 156 help 157 This enables support for systems with more than one CPU. If you have 158 a system with only one CPU, say N. If you have a system with more 159 than one CPU, say Y. 160 161 If you say N here, the kernel will run on uni- and multiprocessor 162 machines, but will use only one CPU of a multiprocessor machine. If 163 you say Y here, the kernel will run on many, but not all, 164 uniprocessor machines. On a uniprocessor machine, the kernel 165 will run faster if you say N here. 166 167 People using multiprocessor machines who say Y here should also say 168 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 169 Management" code will be disabled if you say Y here. 170 171 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 172 available at <https://www.tldp.org/docs.html#howto>. 173 174 If you don't know what to do here, say N. 175 176config NR_CPUS 177 int "Maximum number of CPUs" 178 depends on SMP 179 range 2 32 if SPARC32 180 range 2 4096 if SPARC64 181 default 32 if SPARC32 182 default 4096 if SPARC64 183 184source "kernel/Kconfig.hz" 185 186config GENERIC_HWEIGHT 187 bool 188 default y 189 190config GENERIC_CALIBRATE_DELAY 191 bool 192 default y 193 194config ARCH_MAY_HAVE_PC_FDC 195 bool 196 default y 197 198config EMULATED_CMPXCHG 199 bool 200 default y if SPARC32 201 help 202 Sparc32 does not have a CAS instruction like sparc64. cmpxchg() 203 is emulated, and therefore it is not completely atomic. 204 205# Makefile helpers 206config SPARC32_SMP 207 bool 208 default y 209 depends on SPARC32 && SMP 210 211config SPARC64_SMP 212 bool 213 default y 214 depends on SPARC64 && SMP 215 216config EARLYFB 217 bool "Support for early boot text console" 218 default y 219 depends on SPARC64 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_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