1 # SPDX-License-Identifier: GPL-2.0-only
3 bool "64-bit kernel" if "$(ARCH)" = "sparc"
4 default "$(ARCH)" = "sparc64"
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.
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
16 select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
17 select ARCH_MIGHT_HAVE_PC_SERIO
20 select HAVE_ASM_MODVERSIONS
23 select HAVE_ARCH_KGDB if !SMP || SPARC64
24 select HAVE_ARCH_TRACEHOOK
25 select HAVE_EXIT_THREAD
27 select SYSCTL_EXCEPTION_TRACE
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 GENERIC_CLOCKEVENTS
41 select GENERIC_STRNCPY_FROM_USER
42 select GENERIC_STRNLEN_USER
43 select MODULES_USE_ELF_RELA
44 select PCI_SYSCALL if PCI
45 select ODD_RT_SIGACTION
47 select CPU_NO_EFFICIENT_FFS
48 select LOCKDEP_SMALL if LOCKDEP
49 select NEED_DMA_MAP_STATE
50 select NEED_SG_DMA_LENGTH
54 select ARCH_32BIT_OFF_T
55 select ARCH_HAS_SYNC_DMA_FOR_CPU
56 select GENERIC_ATOMIC64
63 select HAVE_FUNCTION_TRACER
64 select HAVE_FUNCTION_GRAPH_TRACER
65 select HAVE_KRETPROBES
67 select MMU_GATHER_RCU_TABLE_FREE if SMP
68 select HAVE_MEMBLOCK_NODE_MAP
69 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
70 select HAVE_DYNAMIC_FTRACE
71 select HAVE_FTRACE_MCOUNT_RECORD
72 select HAVE_SYSCALL_TRACEPOINTS
73 select HAVE_CONTEXT_TRACKING
74 select HAVE_DEBUG_KMEMLEAK
80 select RTC_DRV_STARFIRE
81 select HAVE_PERF_EVENTS
82 select PERF_USE_VMALLOC
83 select IRQ_PREFLOW_FASTEOI
84 select ARCH_HAVE_NMI_SAFE_CMPXCHG
85 select HAVE_C_RECORDMCOUNT
86 select HAVE_ARCH_AUDITSYSCALL
87 select ARCH_SUPPORTS_ATOMIC_RMW
89 select HAVE_REGS_AND_STACK_ACCESS_API
90 select ARCH_USE_QUEUED_RWLOCKS
91 select ARCH_USE_QUEUED_SPINLOCKS
92 select GENERIC_TIME_VSYSCALL
93 select ARCH_CLOCKSOURCE_DATA
94 select ARCH_HAS_PTE_SPECIAL
95 select PCI_DOMAINS if PCI
96 select ARCH_HAS_GIGANTIC_PAGE
100 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
101 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
103 config ARCH_PROC_KCORE_TEXT
106 config CPU_BIG_ENDIAN
113 config STACKTRACE_SUPPORT
117 config LOCKDEP_SUPPORT
121 config ARCH_HIBERNATION_POSSIBLE
122 def_bool y if SPARC64
128 config HAVE_SETUP_PER_CPU_AREA
129 def_bool y if SPARC64
131 config NEED_PER_CPU_EMBED_FIRST_CHUNK
132 def_bool y if SPARC64
134 config NEED_PER_CPU_PAGE_FIRST_CHUNK
135 def_bool y if SPARC64
149 config GENERIC_ISA_DMA
153 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
154 def_bool y if SPARC64
156 config PGTABLE_LEVELS
160 config ARCH_SUPPORTS_UPROBES
161 def_bool y if SPARC64
163 menu "Processor type and features"
166 bool "Symmetric multi-processing support"
168 This enables support for systems with more than one CPU. If you have
169 a system with only one CPU, say N. If you have a system with more
172 If you say N here, the kernel will run on uni- and multiprocessor
173 machines, but will use only one CPU of a multiprocessor machine. If
174 you say Y here, the kernel will run on many, but not all,
175 uniprocessor machines. On a uniprocessor machine, the kernel
176 will run faster if you say N here.
178 People using multiprocessor machines who say Y here should also say
179 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
180 Management" code will be disabled if you say Y here.
182 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
183 available at <http://www.tldp.org/docs.html#howto>.
185 If you don't know what to do here, say N.
188 int "Maximum number of CPUs"
190 range 2 32 if SPARC32
191 range 2 4096 if SPARC64
192 default 32 if SPARC32
193 default 4096 if SPARC64
195 source "kernel/Kconfig.hz"
197 config GENERIC_HWEIGHT
201 config GENERIC_CALIBRATE_DELAY
205 config ARCH_MAY_HAVE_PC_FDC
209 config EMULATED_CMPXCHG
213 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
214 is emulated, and therefore it is not completely atomic.
220 depends on SPARC32 && SMP
225 depends on SPARC64 && SMP
228 bool "Support for early boot text console"
232 Say Y here to enable a faster early framebuffer boot console.
235 bool "Enable seccomp to safely compute untrusted bytecode"
236 depends on SPARC64 && PROC_FS
239 This kernel feature is useful for number crunching applications
240 that may need to compute untrusted bytecode during their
241 execution. By using pipes or other transports made available to
242 the process as file descriptors supporting the read/write
243 syscalls, it's possible to isolate those applications in
244 their own address space using seccomp. Once seccomp is
245 enabled via /proc/<pid>/seccomp, it cannot be disabled
246 and the task is only allowed to execute a few safe syscalls
247 defined by each seccomp mode.
249 If unsure, say Y. Only embedded should say N here.
252 bool "Support for hot-pluggable CPUs"
253 depends on SPARC64 && SMP
255 Say Y here to experiment with turning CPUs off and on. CPUs
256 can be controlled through /sys/devices/system/cpu/cpu#.
257 Say N if you want to disable CPU hotplug.
260 source "drivers/cpufreq/Kconfig"
264 tristate "UltraSPARC-III Memory Controller driver"
268 This adds a driver for the UltraSPARC-III memory controller.
269 Loading this driver allows exact mnemonic strings to be
270 printed in the event of a memory error, so that the faulty DIMM
271 on the motherboard can be matched to the error.
273 If in doubt, say Y, as this information can be very useful.
275 # Global things across all Sun machines.
276 config GENERIC_LOCKBREAK
279 depends on SPARC64 && SMP && PREEMPTION
283 depends on SPARC64 && SMP
286 int "Maximum NUMA Nodes (as a power of 2)"
289 depends on NEED_MULTIPLE_NODES
291 Specify the maximum number of NUMA Nodes available on the target
292 system. Increases memory reserved to accommodate various tables.
294 # Some NUMA nodes have memory ranges that span
295 # other nodes. Even though a pfn is valid and
296 # between a node's start and end pfns, it may not
297 # reside on that node. See memmap_init_zone()
299 config NODES_SPAN_OTHER_NODES
301 depends on NEED_MULTIPLE_NODES
303 config ARCH_SPARSEMEM_ENABLE
304 def_bool y if SPARC64
305 select SPARSEMEM_VMEMMAP_ENABLE
307 config ARCH_SPARSEMEM_DEFAULT
308 def_bool y if SPARC64
310 config FORCE_MAX_ZONEORDER
311 int "Maximum zone order"
314 The kernel memory allocator divides physically contiguous memory
315 blocks into "zones", where each zone is a power of two number of
316 pages. This option selects the largest power of two that the kernel
317 keeps in the memory allocator. If you need to allocate very large
318 blocks of physically contiguous memory, then you may need to
321 This config option is actually maximum order plus one. For example,
322 a value of 13 means that the largest free memory block is 2^12 pages.
325 source "kernel/power/Kconfig"
329 bool "SMT (Hyperthreading) scheduler support"
330 depends on SPARC64 && SMP
333 SMT scheduler support improves the CPU scheduler's decision making
334 when dealing with SPARC cpus at a cost of slightly increased overhead
335 in some places. If unsure say N here.
338 bool "Multi-core scheduler support"
339 depends on SPARC64 && SMP
342 Multi-core scheduler support improves the CPU scheduler's decision
343 making when dealing with multi-core CPU chips at a cost of slightly
344 increased overhead in some places. If unsure say N here.
347 bool "Default bootloader kernel arguments"
351 string "Initial kernel command string"
352 depends on CMDLINE_BOOL
353 default "console=ttyS0,9600 root=/dev/sda1"
355 Say Y here if you want to be able to pass default arguments to
356 the kernel. This will be overridden by the bootloader, if you
357 use one (such as SILO). This is most useful if you want to boot
358 a kernel from TFTP, and want default options to be available
359 with having them passed on the command line.
361 NOTE: This option WILL override the PROM bootargs setting!
367 Enable power management and CPU standby features on supported
371 tristate "Sun4m LED driver"
374 This driver toggles the front-panel LED on sun4m systems
375 in a user-specifiable manner. Its state can be probed
376 by reading /proc/led and its blinking mode can be changed
377 via writes to /proc/led
379 config SERIAL_CONSOLE
384 If you say Y here, it will be possible to use a serial port as the
385 system console (the system console is the device which receives all
386 kernel messages and warnings and which allows logins in single user
387 mode). This could be useful if some terminal or printer is connected
390 Even if you say Y here, the currently visible virtual console
391 (/dev/tty0) will still be used as the system console by default, but
392 you can alter that using a kernel command line option such as
393 "console=ttyS1". (Try "man bootparam" or see the documentation of
394 your boot loader (silo) about how to pass options to the kernel at
397 If you don't have a graphics card installed and you say Y here, the
398 kernel will automatically use the first serial line, /dev/ttyS0, as
404 bool "Sparc Leon processor family"
406 select USB_EHCI_BIG_ENDIAN_MMIO
407 select USB_EHCI_BIG_ENDIAN_DESC
408 select USB_UHCI_BIG_ENDIAN_MMIO
409 select USB_UHCI_BIG_ENDIAN_DESC
411 If you say Y here if you are running on a SPARC-LEON processor.
412 The LEON processor is a synthesizable VHDL model of the
413 SPARC-v8 standard. LEON is part of the GRLIB collection of
414 IP cores that are distributed under GPL. GRLIB can be downloaded
415 from www.gaisler.com. You can download a sparc-linux cross-compilation
416 toolchain at www.gaisler.com.
419 menu "U-Boot options"
421 config UBOOT_LOAD_ADDR
422 hex "uImage Load Address"
425 U-Boot kernel load address, the address in physical address space
426 where u-boot will place the Linux kernel before booting it.
427 This address is normally the base address of main memory + 0x4000.
429 config UBOOT_FLASH_ADDR
430 hex "uImage.o Load Address"
433 Optional setting only affecting the uImage.o ELF-image used to
434 download the uImage file to the target using a ELF-loader other than
435 U-Boot. It may for example be used to download an uImage to FLASH with
436 the GRMON utility before even starting u-boot.
438 config UBOOT_ENTRY_ADDR
439 hex "uImage Entry Address"
442 Do not change this unless you know what you're doing. This is
443 hardcoded by the SPARC32 and LEON port.
445 This is the virtual address u-boot jumps to when booting the Linux
453 menu "Bus options (PCI etc.)"
463 bool "Sun Logical Domains support"
466 Say Y here is you want to support virtual devices via
471 depends on PCI && SPARC32 && !SPARC_LEON
476 depends on PCI && SPARC_LEON
480 bool "GRPCI Host Bridge Support"
484 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
485 PCI host controller is typically found in GRLIB SPARC32/LEON
486 systems. The driver has one property (all_pci_errors) controlled
487 from the bootloader that makes the GRPCI to generate interrupts
488 on detected PCI Parity and System errors.
491 bool "GRPCI2 Host Bridge Support"
495 Say Y here to include the GRPCI2 Host Bridge Driver.
497 config SUN_OPENPROMFS
498 tristate "Openprom tree appears in /proc/openprom"
500 If you say Y, the OpenPROM device tree will be available as a
501 virtual file system, which you can mount to /proc/openprom by "mount
502 -t openpromfs none /proc/openprom".
504 To compile the /proc/openprom support as a module, choose M here: the
505 module will be called openpromfs.
507 Only choose N if you know in advance that you will not need to modify
508 OpenPROM settings on the running system.
514 depends on SPARC64 && PCI
516 config SPARC64_PCI_MSI
519 depends on SPARC64_PCI && PCI_MSI
527 select COMPAT_BINFMT_ELF
529 select ARCH_WANT_OLD_COMPAT_IPC
530 select COMPAT_OLD_SIGACTION
532 config SYSVIPC_COMPAT
534 depends on COMPAT && SYSVIPC
537 source "drivers/sbus/char/Kconfig"