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_CC_CAN_LINK 17 select ARCH_HAS_CPU_CACHE_ALIASING 18 select ARCH_HAS_DMA_OPS 19 select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI 20 select ARCH_MIGHT_HAVE_PC_SERIO 21 select OF 22 select OF_PROMTREE 23 select HAVE_ASM_MODVERSIONS 24 select HAVE_ARCH_KGDB if !SMP || SPARC64 25 select HAVE_ARCH_TRACEHOOK 26 select HAVE_ARCH_SECCOMP if SPARC64 27 select HAVE_EXIT_THREAD 28 select HAVE_PCI 29 select SYSCTL_EXCEPTION_TRACE 30 select RTC_CLASS 31 select RTC_DRV_M48T59 32 select RTC_SYSTOHC 33 select HAVE_ARCH_JUMP_LABEL if SPARC64 34 select GENERIC_IRQ_SHOW 35 select ARCH_WANT_IPC_PARSE_VERSION 36 select GENERIC_PCI_IOMAP 37 select HAS_IOPORT 38 select HAVE_HARDLOCKUP_DETECTOR_SPARC64 if SPARC64 39 select HAVE_CBPF_JIT if SPARC32 40 select HAVE_EBPF_JIT if SPARC64 41 select HAVE_DEBUG_BUGVERBOSE 42 select GENERIC_SMP_IDLE_THREAD 43 select MODULES_USE_ELF_RELA 44 select PCI_SYSCALL if PCI 45 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI 46 select ODD_RT_SIGACTION 47 select OLD_SIGSUSPEND 48 select CPU_NO_EFFICIENT_FFS 49 select LOCKDEP_SMALL if LOCKDEP 50 select NEED_DMA_MAP_STATE 51 select NEED_SG_DMA_LENGTH 52 select TRACE_IRQFLAGS_SUPPORT 53 54config SPARC32 55 def_bool !64BIT 56 select ARCH_32BIT_OFF_T 57 select ARCH_HAS_CPU_FINALIZE_INIT if !SMP 58 select ARCH_HAS_SYNC_DMA_FOR_CPU 59 select CLZ_TAB 60 select DMA_DIRECT_REMAP 61 select GENERIC_ATOMIC64 62 select GENERIC_LIB_CMPDI2 63 select GENERIC_LIB_UCMPDI2 64 select HAVE_UID16 65 select HAVE_PAGE_SIZE_4KB 66 select LOCK_MM_AND_FIND_VMA 67 select OLD_SIGACTION 68 select ZONE_DMA 69 70config SPARC64 71 def_bool 64BIT 72 select ALTERNATE_USER_ADDRESS_SPACE 73 select HAVE_FUNCTION_TRACER 74 select HAVE_FUNCTION_GRAPH_TRACER 75 select HAVE_KRETPROBES 76 select HAVE_KPROBES 77 select MMU_GATHER_RCU_TABLE_FREE if SMP 78 select HAVE_ARCH_TLB_REMOVE_TABLE if SMP 79 select MMU_GATHER_MERGE_VMAS 80 select MMU_GATHER_NO_FLUSH_CACHE 81 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 82 select HAVE_DYNAMIC_FTRACE 83 select HAVE_PAGE_SIZE_8KB 84 select HAVE_SYSCALL_TRACEPOINTS 85 select HAVE_CONTEXT_TRACKING_USER 86 select HAVE_TIF_NOHZ 87 select HAVE_DEBUG_KMEMLEAK 88 select IOMMU_HELPER 89 select SPARSE_IRQ 90 select RTC_DRV_CMOS 91 select RTC_DRV_BQ4802 92 select RTC_DRV_SUN4V 93 select RTC_DRV_STARFIRE 94 select HAVE_PERF_EVENTS 95 select PERF_USE_VMALLOC 96 select ARCH_HAVE_NMI_SAFE_CMPXCHG 97 select HAVE_C_RECORDMCOUNT 98 select HAVE_ARCH_AUDITSYSCALL 99 select ARCH_SUPPORTS_ATOMIC_RMW 100 select ARCH_SUPPORTS_DEBUG_PAGEALLOC 101 select ARCH_SUPPORTS_HUGETLBFS 102 select HAVE_NMI 103 select HAVE_REGS_AND_STACK_ACCESS_API 104 select ARCH_USE_QUEUED_RWLOCKS 105 select ARCH_USE_QUEUED_SPINLOCKS 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 select ARCH_SUPPORTS_SCHED_SMT if SMP 114 select ARCH_SUPPORTS_SCHED_MC if SMP 115 select ARCH_HAS_LAZY_MMU_MODE 116 select HAVE_GENERIC_VDSO 117 select GENERIC_GETTIMEOFDAY 118 119config ARCH_PROC_KCORE_TEXT 120 def_bool y 121 122config CPU_BIG_ENDIAN 123 def_bool y 124 125config STACKTRACE_SUPPORT 126 bool 127 default y if SPARC64 128 129config LOCKDEP_SUPPORT 130 bool 131 default y if SPARC64 132 133config ARCH_HIBERNATION_POSSIBLE 134 def_bool y if SPARC64 135 136config AUDIT_ARCH 137 bool 138 default y 139 140config MMU 141 bool 142 default y 143 144config HIGHMEM 145 bool 146 default y if SPARC32 147 select KMAP_LOCAL 148 149config PGTABLE_LEVELS 150 default 4 if 64BIT 151 default 3 152 153config ARCH_SUPPORTS_UPROBES 154 def_bool y if SPARC64 155 156menu "Processor type and features" 157 158config SMP 159 bool "Symmetric multi-processing support" 160 help 161 This enables support for systems with more than one CPU. If you have 162 a system with only one CPU, say N. If you have a system with more 163 than one CPU, say Y. 164 165 If you say N here, the kernel will run on uni- and multiprocessor 166 machines, but will use only one CPU of a multiprocessor machine. If 167 you say Y here, the kernel will run on many, but not all, 168 uniprocessor machines. On a uniprocessor machine, the kernel 169 will run faster if you say N here. 170 171 People using multiprocessor machines who say Y here should also say 172 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 173 Management" code will be disabled if you say Y here. 174 175 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 176 available at <https://www.tldp.org/docs.html#howto>. 177 178 If you don't know what to do here, say N. 179 180config NR_CPUS 181 int "Maximum number of CPUs" 182 depends on SMP 183 range 2 32 if SPARC32 184 range 2 4096 if SPARC64 185 default 32 if SPARC32 186 default 4096 if SPARC64 187 188source "kernel/Kconfig.hz" 189 190config GENERIC_HWEIGHT 191 bool 192 default y 193 194config GENERIC_CALIBRATE_DELAY 195 bool 196 default y 197 198config ARCH_MAY_HAVE_PC_FDC 199 bool 200 default y 201 202config EMULATED_CMPXCHG 203 bool 204 default y if SPARC32 205 help 206 Sparc32 does not have a CAS instruction like sparc64. cmpxchg() 207 is emulated, and therefore it is not completely atomic. 208 209# Makefile helpers 210config SPARC32_SMP 211 bool 212 default y 213 depends on SPARC32 && SMP 214 215config SPARC64_SMP 216 bool 217 default y 218 depends on SPARC64 && SMP 219 220config EARLYFB 221 bool "Support for early boot text console" 222 default y 223 depends on SPARC64 224 select FONT_SUN8x16 225 select FONT_SUPPORT 226 help 227 Say Y here to enable a faster early framebuffer boot console. 228 229config HOTPLUG_CPU 230 bool "Support for hot-pluggable CPUs" 231 depends on SPARC64 && SMP 232 help 233 Say Y here to experiment with turning CPUs off and on. CPUs 234 can be controlled through /sys/devices/system/cpu/cpu#. 235 Say N if you want to disable CPU hotplug. 236 237if SPARC64 238source "drivers/cpufreq/Kconfig" 239endif 240 241config US3_MC 242 tristate "UltraSPARC-III Memory Controller driver" 243 depends on SPARC64 244 default y 245 help 246 This adds a driver for the UltraSPARC-III memory controller. 247 Loading this driver allows exact mnemonic strings to be 248 printed in the event of a memory error, so that the faulty DIMM 249 on the motherboard can be matched to the error. 250 251 If in doubt, say Y, as this information can be very useful. 252 253# Global things across all Sun machines. 254config GENERIC_LOCKBREAK 255 bool 256 default y 257 depends on SPARC64 && SMP && PREEMPTION 258 259config NUMA 260 bool "NUMA support" 261 depends on SPARC64 && SMP 262 263config NODES_SHIFT 264 int "Maximum NUMA Nodes (as a power of 2)" 265 range 4 5 if SPARC64 266 default "5" 267 depends on NUMA 268 help 269 Specify the maximum number of NUMA Nodes available on the target 270 system. Increases memory reserved to accommodate various tables. 271 272config ARCH_SPARSEMEM_ENABLE 273 def_bool y if SPARC64 274 select SPARSEMEM_VMEMMAP_ENABLE 275 276config ARCH_SPARSEMEM_DEFAULT 277 def_bool y if SPARC64 278 279config ARCH_FORCE_MAX_ORDER 280 int "Order of maximal physically contiguous allocations" 281 default "12" 282 help 283 The kernel page allocator limits the size of maximal physically 284 contiguous allocations. The limit is called MAX_PAGE_ORDER and it 285 defines the maximal power of two of number of pages that can be 286 allocated as a single contiguous block. This option allows 287 overriding the default setting when ability to allocate very 288 large blocks of physically contiguous memory is required. 289 290 Don't change if unsure. 291 292if SPARC64 || COMPILE_TEST 293source "kernel/power/Kconfig" 294endif 295 296config CMDLINE_BOOL 297 bool "Default bootloader kernel arguments" 298 depends on SPARC64 299 300config CMDLINE 301 string "Initial kernel command string" 302 depends on CMDLINE_BOOL 303 default "console=ttyS0,9600 root=/dev/sda1" 304 help 305 Say Y here if you want to be able to pass default arguments to 306 the kernel. This will be overridden by the bootloader, if you 307 use one (such as SILO). This is most useful if you want to boot 308 a kernel from TFTP, and want default options to be available 309 with having them passed on the command line. 310 311 NOTE: This option WILL override the PROM bootargs setting! 312 313config SUN_PM 314 bool 315 default y if SPARC32 316 help 317 Enable power management and CPU standby features on supported 318 SPARC platforms. 319 320config SPARC_LED 321 tristate "Sun4m LED driver" 322 depends on SPARC32 323 help 324 This driver toggles the front-panel LED on sun4m systems 325 in a user-specifiable manner. Its state can be probed 326 by reading /proc/led and its blinking mode can be changed 327 via writes to /proc/led 328 329config SPARC_LEON 330 bool "Sparc Leon processor family" 331 depends on SPARC32 332 select USB_EHCI_BIG_ENDIAN_MMIO 333 select USB_EHCI_BIG_ENDIAN_DESC 334 select USB_UHCI_BIG_ENDIAN_MMIO 335 select USB_UHCI_BIG_ENDIAN_DESC 336 help 337 If you say Y here if you are running on a SPARC-LEON processor. 338 The LEON processor is a synthesizable VHDL model of the 339 SPARC-v8 standard. LEON is part of the GRLIB collection of 340 IP cores that are distributed under GPL. GRLIB can be downloaded 341 from www.gaisler.com. You can download a sparc-linux cross-compilation 342 toolchain at www.gaisler.com. 343 344if SPARC_LEON 345menu "U-Boot options" 346 347config UBOOT_LOAD_ADDR 348 hex "uImage Load Address" 349 default 0x40004000 350 help 351 U-Boot kernel load address, the address in physical address space 352 where u-boot will place the Linux kernel before booting it. 353 This address is normally the base address of main memory + 0x4000. 354 355config UBOOT_FLASH_ADDR 356 hex "uImage.o Load Address" 357 default 0x00080000 358 help 359 Optional setting only affecting the uImage.o ELF-image used to 360 download the uImage file to the target using a ELF-loader other than 361 U-Boot. It may for example be used to download an uImage to FLASH with 362 the GRMON utility before even starting u-boot. 363 364config UBOOT_ENTRY_ADDR 365 hex "uImage Entry Address" 366 default 0xf0004000 367 help 368 Do not change this unless you know what you're doing. This is 369 hardcoded by the SPARC32 and LEON port. 370 371 This is the virtual address u-boot jumps to when booting the Linux 372 Kernel. 373 374endmenu 375endif 376 377endmenu 378 379menu "Bus options (PCI etc.)" 380config SBUS 381 bool 382 default y 383 384config SBUSCHAR 385 bool 386 default y 387 388config SUN_LDOMS 389 bool "Sun Logical Domains support" 390 depends on SPARC64 391 help 392 Say Y here is you want to support virtual devices via 393 Logical Domains. 394 395config PCIC_PCI 396 bool 397 depends on PCI && SPARC32 && !SPARC_LEON 398 default y 399 400config LEON_PCI 401 bool 402 depends on PCI && SPARC_LEON 403 default y 404 405config SPARC_GRPCI1 406 bool "GRPCI Host Bridge Support" 407 depends on LEON_PCI 408 default y 409 help 410 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI 411 PCI host controller is typically found in GRLIB SPARC32/LEON 412 systems. The driver has one property (all_pci_errors) controlled 413 from the bootloader that makes the GRPCI to generate interrupts 414 on detected PCI Parity and System errors. 415 416config SPARC_GRPCI2 417 bool "GRPCI2 Host Bridge Support" 418 depends on LEON_PCI 419 default y 420 help 421 Say Y here to include the GRPCI2 Host Bridge Driver. 422 423config SUN_OPENPROMFS 424 tristate "Openprom tree appears in /proc/openprom" 425 help 426 If you say Y, the OpenPROM device tree will be available as a 427 virtual file system, which you can mount to /proc/openprom by "mount 428 -t openpromfs none /proc/openprom". 429 430 To compile the /proc/openprom support as a module, choose M here: the 431 module will be called openpromfs. 432 433 Only choose N if you know in advance that you will not need to modify 434 OpenPROM settings on the running system. 435 436# Makefile helpers 437config SPARC64_PCI 438 bool 439 default y 440 depends on SPARC64 && PCI 441 442config SPARC64_PCI_MSI 443 bool 444 default y 445 depends on SPARC64_PCI && PCI_MSI 446 447endmenu 448 449config COMPAT 450 bool 451 depends on SPARC64 452 depends on !LD_IS_LLD 453 default y 454 select HAVE_UID16 455 select ARCH_WANT_OLD_COMPAT_IPC 456 select COMPAT_OLD_SIGACTION 457 458config ARCH_CC_CAN_LINK 459 bool 460 default $(cc_can_link_user,-m64) if 64BIT 461 default $(cc_can_link_user,-m32) 462 463config ARCH_USERFLAGS 464 string 465 default "-m64" if 64BIT 466 default "-m32" 467 468source "drivers/sbus/char/Kconfig" 469