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_CPU_FINALIZE_INIT if !SMP
56 select ARCH_HAS_SYNC_DMA_FOR_CPU
57 select GENERIC_ATOMIC64
64 select HAVE_FUNCTION_TRACER
65 select HAVE_FUNCTION_GRAPH_TRACER
66 select HAVE_KRETPROBES
68 select HAVE_RCU_TABLE_FREE if SMP
69 select HAVE_MEMBLOCK_NODE_MAP
70 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
71 select HAVE_DYNAMIC_FTRACE
72 select HAVE_FTRACE_MCOUNT_RECORD
73 select HAVE_SYSCALL_TRACEPOINTS
74 select HAVE_CONTEXT_TRACKING
75 select HAVE_DEBUG_KMEMLEAK
81 select RTC_DRV_STARFIRE
82 select HAVE_PERF_EVENTS
83 select PERF_USE_VMALLOC
84 select IRQ_PREFLOW_FASTEOI
85 select ARCH_HAVE_NMI_SAFE_CMPXCHG
86 select HAVE_C_RECORDMCOUNT
87 select HAVE_ARCH_AUDITSYSCALL
88 select ARCH_SUPPORTS_ATOMIC_RMW
90 select HAVE_REGS_AND_STACK_ACCESS_API
91 select ARCH_USE_QUEUED_RWLOCKS
92 select ARCH_USE_QUEUED_SPINLOCKS
93 select GENERIC_TIME_VSYSCALL
94 select ARCH_CLOCKSOURCE_DATA
95 select ARCH_HAS_PTE_SPECIAL
96 select PCI_DOMAINS if PCI
97 select ARCH_HAS_GIGANTIC_PAGE
101 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
102 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
104 config ARCH_PROC_KCORE_TEXT
107 config CPU_BIG_ENDIAN
114 config STACKTRACE_SUPPORT
118 config LOCKDEP_SUPPORT
122 config ARCH_HIBERNATION_POSSIBLE
123 def_bool y if SPARC64
129 config HAVE_SETUP_PER_CPU_AREA
130 def_bool y if SPARC64
132 config NEED_PER_CPU_EMBED_FIRST_CHUNK
133 def_bool y if SPARC64
135 config NEED_PER_CPU_PAGE_FIRST_CHUNK
136 def_bool y if SPARC64
150 config GENERIC_ISA_DMA
154 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
155 def_bool y if SPARC64
157 config PGTABLE_LEVELS
161 config ARCH_SUPPORTS_UPROBES
162 def_bool y if SPARC64
164 menu "Processor type and features"
167 bool "Symmetric multi-processing support"
169 This enables support for systems with more than one CPU. If you have
170 a system with only one CPU, say N. If you have a system with more
173 If you say N here, the kernel will run on uni- and multiprocessor
174 machines, but will use only one CPU of a multiprocessor machine. If
175 you say Y here, the kernel will run on many, but not all,
176 uniprocessor machines. On a uniprocessor machine, the kernel
177 will run faster if you say N here.
179 People using multiprocessor machines who say Y here should also say
180 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
181 Management" code will be disabled if you say Y here.
183 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
184 available at <http://www.tldp.org/docs.html#howto>.
186 If you don't know what to do here, say N.
189 int "Maximum number of CPUs"
191 range 2 32 if SPARC32
192 range 2 4096 if SPARC64
193 default 32 if SPARC32
194 default 4096 if SPARC64
196 source "kernel/Kconfig.hz"
198 config GENERIC_HWEIGHT
202 config GENERIC_CALIBRATE_DELAY
206 config ARCH_MAY_HAVE_PC_FDC
210 config EMULATED_CMPXCHG
214 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
215 is emulated, and therefore it is not completely atomic.
221 depends on SPARC32 && SMP
226 depends on SPARC64 && SMP
229 bool "Support for early boot text console"
233 Say Y here to enable a faster early framebuffer boot console.
236 bool "Enable seccomp to safely compute untrusted bytecode"
237 depends on SPARC64 && PROC_FS
240 This kernel feature is useful for number crunching applications
241 that may need to compute untrusted bytecode during their
242 execution. By using pipes or other transports made available to
243 the process as file descriptors supporting the read/write
244 syscalls, it's possible to isolate those applications in
245 their own address space using seccomp. Once seccomp is
246 enabled via /proc/<pid>/seccomp, it cannot be disabled
247 and the task is only allowed to execute a few safe syscalls
248 defined by each seccomp mode.
250 If unsure, say Y. Only embedded should say N here.
253 bool "Support for hot-pluggable CPUs"
254 depends on SPARC64 && SMP
256 Say Y here to experiment with turning CPUs off and on. CPUs
257 can be controlled through /sys/devices/system/cpu/cpu#.
258 Say N if you want to disable CPU hotplug.
261 source "drivers/cpufreq/Kconfig"
265 tristate "UltraSPARC-III Memory Controller driver"
269 This adds a driver for the UltraSPARC-III memory controller.
270 Loading this driver allows exact mnemonic strings to be
271 printed in the event of a memory error, so that the faulty DIMM
272 on the motherboard can be matched to the error.
274 If in doubt, say Y, as this information can be very useful.
276 # Global things across all Sun machines.
277 config GENERIC_LOCKBREAK
280 depends on SPARC64 && SMP && PREEMPT
284 depends on SPARC64 && SMP
287 int "Maximum NUMA Nodes (as a power of 2)"
290 depends on NEED_MULTIPLE_NODES
292 Specify the maximum number of NUMA Nodes available on the target
293 system. Increases memory reserved to accommodate various tables.
295 # Some NUMA nodes have memory ranges that span
296 # other nodes. Even though a pfn is valid and
297 # between a node's start and end pfns, it may not
298 # reside on that node. See memmap_init_zone()
300 config NODES_SPAN_OTHER_NODES
302 depends on NEED_MULTIPLE_NODES
304 config ARCH_SPARSEMEM_ENABLE
305 def_bool y if SPARC64
306 select SPARSEMEM_VMEMMAP_ENABLE
308 config ARCH_SPARSEMEM_DEFAULT
309 def_bool y if SPARC64
311 config FORCE_MAX_ZONEORDER
312 int "Maximum zone order"
315 The kernel memory allocator divides physically contiguous memory
316 blocks into "zones", where each zone is a power of two number of
317 pages. This option selects the largest power of two that the kernel
318 keeps in the memory allocator. If you need to allocate very large
319 blocks of physically contiguous memory, then you may need to
322 This config option is actually maximum order plus one. For example,
323 a value of 13 means that the largest free memory block is 2^12 pages.
325 if SPARC64 || COMPILE_TEST
326 source "kernel/power/Kconfig"
330 bool "SMT (Hyperthreading) scheduler support"
331 depends on SPARC64 && SMP
334 SMT scheduler support improves the CPU scheduler's decision making
335 when dealing with SPARC cpus at a cost of slightly increased overhead
336 in some places. If unsure say N here.
339 bool "Multi-core scheduler support"
340 depends on SPARC64 && SMP
343 Multi-core scheduler support improves the CPU scheduler's decision
344 making when dealing with multi-core CPU chips at a cost of slightly
345 increased overhead in some places. If unsure say N here.
348 bool "Default bootloader kernel arguments"
352 string "Initial kernel command string"
353 depends on CMDLINE_BOOL
354 default "console=ttyS0,9600 root=/dev/sda1"
356 Say Y here if you want to be able to pass default arguments to
357 the kernel. This will be overridden by the bootloader, if you
358 use one (such as SILO). This is most useful if you want to boot
359 a kernel from TFTP, and want default options to be available
360 with having them passed on the command line.
362 NOTE: This option WILL override the PROM bootargs setting!
368 Enable power management and CPU standby features on supported
372 tristate "Sun4m LED driver"
375 This driver toggles the front-panel LED on sun4m systems
376 in a user-specifiable manner. Its state can be probed
377 by reading /proc/led and its blinking mode can be changed
378 via writes to /proc/led
380 config SERIAL_CONSOLE
385 If you say Y here, it will be possible to use a serial port as the
386 system console (the system console is the device which receives all
387 kernel messages and warnings and which allows logins in single user
388 mode). This could be useful if some terminal or printer is connected
391 Even if you say Y here, the currently visible virtual console
392 (/dev/tty0) will still be used as the system console by default, but
393 you can alter that using a kernel command line option such as
394 "console=ttyS1". (Try "man bootparam" or see the documentation of
395 your boot loader (silo) about how to pass options to the kernel at
398 If you don't have a graphics card installed and you say Y here, the
399 kernel will automatically use the first serial line, /dev/ttyS0, as
405 bool "Sparc Leon processor family"
407 select USB_EHCI_BIG_ENDIAN_MMIO
408 select USB_EHCI_BIG_ENDIAN_DESC
409 select USB_UHCI_BIG_ENDIAN_MMIO
410 select USB_UHCI_BIG_ENDIAN_DESC
412 If you say Y here if you are running on a SPARC-LEON processor.
413 The LEON processor is a synthesizable VHDL model of the
414 SPARC-v8 standard. LEON is part of the GRLIB collection of
415 IP cores that are distributed under GPL. GRLIB can be downloaded
416 from www.gaisler.com. You can download a sparc-linux cross-compilation
417 toolchain at www.gaisler.com.
420 menu "U-Boot options"
422 config UBOOT_LOAD_ADDR
423 hex "uImage Load Address"
426 U-Boot kernel load address, the address in physical address space
427 where u-boot will place the Linux kernel before booting it.
428 This address is normally the base address of main memory + 0x4000.
430 config UBOOT_FLASH_ADDR
431 hex "uImage.o Load Address"
434 Optional setting only affecting the uImage.o ELF-image used to
435 download the uImage file to the target using a ELF-loader other than
436 U-Boot. It may for example be used to download an uImage to FLASH with
437 the GRMON utility before even starting u-boot.
439 config UBOOT_ENTRY_ADDR
440 hex "uImage Entry Address"
443 Do not change this unless you know what you're doing. This is
444 hardcoded by the SPARC32 and LEON port.
446 This is the virtual address u-boot jumps to when booting the Linux
454 menu "Bus options (PCI etc.)"
464 bool "Sun Logical Domains support"
467 Say Y here is you want to support virtual devices via
472 depends on PCI && SPARC32 && !SPARC_LEON
477 depends on PCI && SPARC_LEON
481 bool "GRPCI Host Bridge Support"
485 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
486 PCI host controller is typically found in GRLIB SPARC32/LEON
487 systems. The driver has one property (all_pci_errors) controlled
488 from the bootloader that makes the GRPCI to generate interrupts
489 on detected PCI Parity and System errors.
492 bool "GRPCI2 Host Bridge Support"
496 Say Y here to include the GRPCI2 Host Bridge Driver.
498 config SUN_OPENPROMFS
499 tristate "Openprom tree appears in /proc/openprom"
501 If you say Y, the OpenPROM device tree will be available as a
502 virtual file system, which you can mount to /proc/openprom by "mount
503 -t openpromfs none /proc/openprom".
505 To compile the /proc/openprom support as a module, choose M here: the
506 module will be called openpromfs.
508 Only choose N if you know in advance that you will not need to modify
509 OpenPROM settings on the running system.
515 depends on SPARC64 && PCI
517 config SPARC64_PCI_MSI
520 depends on SPARC64_PCI && PCI_MSI
528 select COMPAT_BINFMT_ELF if BINFMT_ELF
530 select ARCH_WANT_OLD_COMPAT_IPC
531 select COMPAT_OLD_SIGACTION
533 config SYSVIPC_COMPAT
535 depends on COMPAT && SYSVIPC
538 source "drivers/sbus/char/Kconfig"