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
21 select HAVE_ASM_MODVERSIONS
24 select HAVE_ARCH_KGDB if !SMP || SPARC64
25 select HAVE_ARCH_TRACEHOOK
26 select HAVE_EXIT_THREAD
28 select SYSCTL_EXCEPTION_TRACE
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 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 GENERIC_CLOCKEVENTS
42 select GENERIC_STRNCPY_FROM_USER
43 select GENERIC_STRNLEN_USER
44 select MODULES_USE_ELF_RELA
45 select PCI_SYSCALL if PCI
46 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
47 select ODD_RT_SIGACTION
49 select CPU_NO_EFFICIENT_FFS
50 select LOCKDEP_SMALL if LOCKDEP
51 select NEED_DMA_MAP_STATE
52 select NEED_SG_DMA_LENGTH
56 select ARCH_32BIT_OFF_T
57 select ARCH_HAS_SYNC_DMA_FOR_CPU
58 select GENERIC_ATOMIC64
65 select HAVE_FUNCTION_TRACER
66 select HAVE_FUNCTION_GRAPH_TRACER
67 select HAVE_KRETPROBES
69 select MMU_GATHER_RCU_TABLE_FREE if SMP
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
76 select HAVE_DEBUG_KMEMLEAK
82 select RTC_DRV_STARFIRE
83 select HAVE_PERF_EVENTS
84 select PERF_USE_VMALLOC
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
99 config ARCH_PROC_KCORE_TEXT
102 config CPU_BIG_ENDIAN
109 config STACKTRACE_SUPPORT
113 config LOCKDEP_SUPPORT
117 config ARCH_HIBERNATION_POSSIBLE
118 def_bool y if SPARC64
124 config HAVE_SETUP_PER_CPU_AREA
125 def_bool y if SPARC64
127 config NEED_PER_CPU_EMBED_FIRST_CHUNK
128 def_bool y if SPARC64
130 config NEED_PER_CPU_PAGE_FIRST_CHUNK
131 def_bool y if SPARC64
145 config GENERIC_ISA_DMA
149 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
150 def_bool y if SPARC64
152 config PGTABLE_LEVELS
156 config ARCH_SUPPORTS_UPROBES
157 def_bool y if SPARC64
159 menu "Processor type and features"
162 bool "Symmetric multi-processing support"
164 This enables support for systems with more than one CPU. If you have
165 a system with only one CPU, say N. If you have a system with more
168 If you say N here, the kernel will run on uni- and multiprocessor
169 machines, but will use only one CPU of a multiprocessor machine. If
170 you say Y here, the kernel will run on many, but not all,
171 uniprocessor machines. On a uniprocessor machine, the kernel
172 will run faster if you say N here.
174 People using multiprocessor machines who say Y here should also say
175 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
176 Management" code will be disabled if you say Y here.
178 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
179 available at <http://www.tldp.org/docs.html#howto>.
181 If you don't know what to do here, say N.
184 int "Maximum number of CPUs"
186 range 2 32 if SPARC32
187 range 2 4096 if SPARC64
188 default 32 if SPARC32
189 default 4096 if SPARC64
191 source "kernel/Kconfig.hz"
193 config GENERIC_HWEIGHT
197 config GENERIC_CALIBRATE_DELAY
201 config ARCH_MAY_HAVE_PC_FDC
205 config EMULATED_CMPXCHG
209 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
210 is emulated, and therefore it is not completely atomic.
216 depends on SPARC32 && SMP
221 depends on SPARC64 && SMP
224 bool "Support for early boot text console"
228 Say Y here to enable a faster early framebuffer boot console.
231 bool "Enable seccomp to safely compute untrusted bytecode"
232 depends on SPARC64 && PROC_FS
235 This kernel feature is useful for number crunching applications
236 that may need to compute untrusted bytecode during their
237 execution. By using pipes or other transports made available to
238 the process as file descriptors supporting the read/write
239 syscalls, it's possible to isolate those applications in
240 their own address space using seccomp. Once seccomp is
241 enabled via /proc/<pid>/seccomp, it cannot be disabled
242 and the task is only allowed to execute a few safe syscalls
243 defined by each seccomp mode.
245 If unsure, say Y. Only embedded should say N here.
248 bool "Support for hot-pluggable CPUs"
249 depends on SPARC64 && SMP
251 Say Y here to experiment with turning CPUs off and on. CPUs
252 can be controlled through /sys/devices/system/cpu/cpu#.
253 Say N if you want to disable CPU hotplug.
256 source "drivers/cpufreq/Kconfig"
260 tristate "UltraSPARC-III Memory Controller driver"
264 This adds a driver for the UltraSPARC-III memory controller.
265 Loading this driver allows exact mnemonic strings to be
266 printed in the event of a memory error, so that the faulty DIMM
267 on the motherboard can be matched to the error.
269 If in doubt, say Y, as this information can be very useful.
271 # Global things across all Sun machines.
272 config GENERIC_LOCKBREAK
275 depends on SPARC64 && SMP && PREEMPTION
279 depends on SPARC64 && SMP
282 int "Maximum NUMA Nodes (as a power of 2)"
285 depends on NEED_MULTIPLE_NODES
287 Specify the maximum number of NUMA Nodes available on the target
288 system. Increases memory reserved to accommodate various tables.
290 config ARCH_SPARSEMEM_ENABLE
291 def_bool y if SPARC64
292 select SPARSEMEM_VMEMMAP_ENABLE
294 config ARCH_SPARSEMEM_DEFAULT
295 def_bool y if SPARC64
297 config FORCE_MAX_ZONEORDER
298 int "Maximum zone order"
301 The kernel memory allocator divides physically contiguous memory
302 blocks into "zones", where each zone is a power of two number of
303 pages. This option selects the largest power of two that the kernel
304 keeps in the memory allocator. If you need to allocate very large
305 blocks of physically contiguous memory, then you may need to
308 This config option is actually maximum order plus one. For example,
309 a value of 13 means that the largest free memory block is 2^12 pages.
312 source "kernel/power/Kconfig"
316 bool "SMT (Hyperthreading) scheduler support"
317 depends on SPARC64 && SMP
320 SMT scheduler support improves the CPU scheduler's decision making
321 when dealing with SPARC cpus at a cost of slightly increased overhead
322 in some places. If unsure say N here.
325 bool "Multi-core scheduler support"
326 depends on SPARC64 && SMP
329 Multi-core scheduler support improves the CPU scheduler's decision
330 making when dealing with multi-core CPU chips at a cost of slightly
331 increased overhead in some places. If unsure say N here.
334 bool "Default bootloader kernel arguments"
338 string "Initial kernel command string"
339 depends on CMDLINE_BOOL
340 default "console=ttyS0,9600 root=/dev/sda1"
342 Say Y here if you want to be able to pass default arguments to
343 the kernel. This will be overridden by the bootloader, if you
344 use one (such as SILO). This is most useful if you want to boot
345 a kernel from TFTP, and want default options to be available
346 with having them passed on the command line.
348 NOTE: This option WILL override the PROM bootargs setting!
354 Enable power management and CPU standby features on supported
358 tristate "Sun4m LED driver"
361 This driver toggles the front-panel LED on sun4m systems
362 in a user-specifiable manner. Its state can be probed
363 by reading /proc/led and its blinking mode can be changed
364 via writes to /proc/led
366 config SERIAL_CONSOLE
371 If you say Y here, it will be possible to use a serial port as the
372 system console (the system console is the device which receives all
373 kernel messages and warnings and which allows logins in single user
374 mode). This could be useful if some terminal or printer is connected
377 Even if you say Y here, the currently visible virtual console
378 (/dev/tty0) will still be used as the system console by default, but
379 you can alter that using a kernel command line option such as
380 "console=ttyS1". (Try "man bootparam" or see the documentation of
381 your boot loader (silo) about how to pass options to the kernel at
384 If you don't have a graphics card installed and you say Y here, the
385 kernel will automatically use the first serial line, /dev/ttyS0, as
391 bool "Sparc Leon processor family"
393 select USB_EHCI_BIG_ENDIAN_MMIO
394 select USB_EHCI_BIG_ENDIAN_DESC
395 select USB_UHCI_BIG_ENDIAN_MMIO
396 select USB_UHCI_BIG_ENDIAN_DESC
398 If you say Y here if you are running on a SPARC-LEON processor.
399 The LEON processor is a synthesizable VHDL model of the
400 SPARC-v8 standard. LEON is part of the GRLIB collection of
401 IP cores that are distributed under GPL. GRLIB can be downloaded
402 from www.gaisler.com. You can download a sparc-linux cross-compilation
403 toolchain at www.gaisler.com.
406 menu "U-Boot options"
408 config UBOOT_LOAD_ADDR
409 hex "uImage Load Address"
412 U-Boot kernel load address, the address in physical address space
413 where u-boot will place the Linux kernel before booting it.
414 This address is normally the base address of main memory + 0x4000.
416 config UBOOT_FLASH_ADDR
417 hex "uImage.o Load Address"
420 Optional setting only affecting the uImage.o ELF-image used to
421 download the uImage file to the target using a ELF-loader other than
422 U-Boot. It may for example be used to download an uImage to FLASH with
423 the GRMON utility before even starting u-boot.
425 config UBOOT_ENTRY_ADDR
426 hex "uImage Entry Address"
429 Do not change this unless you know what you're doing. This is
430 hardcoded by the SPARC32 and LEON port.
432 This is the virtual address u-boot jumps to when booting the Linux
440 menu "Bus options (PCI etc.)"
450 bool "Sun Logical Domains support"
453 Say Y here is you want to support virtual devices via
458 depends on PCI && SPARC32 && !SPARC_LEON
463 depends on PCI && SPARC_LEON
467 bool "GRPCI Host Bridge Support"
471 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
472 PCI host controller is typically found in GRLIB SPARC32/LEON
473 systems. The driver has one property (all_pci_errors) controlled
474 from the bootloader that makes the GRPCI to generate interrupts
475 on detected PCI Parity and System errors.
478 bool "GRPCI2 Host Bridge Support"
482 Say Y here to include the GRPCI2 Host Bridge Driver.
484 config SUN_OPENPROMFS
485 tristate "Openprom tree appears in /proc/openprom"
487 If you say Y, the OpenPROM device tree will be available as a
488 virtual file system, which you can mount to /proc/openprom by "mount
489 -t openpromfs none /proc/openprom".
491 To compile the /proc/openprom support as a module, choose M here: the
492 module will be called openpromfs.
494 Only choose N if you know in advance that you will not need to modify
495 OpenPROM settings on the running system.
501 depends on SPARC64 && PCI
503 config SPARC64_PCI_MSI
506 depends on SPARC64_PCI && PCI_MSI
514 select COMPAT_BINFMT_ELF
516 select ARCH_WANT_OLD_COMPAT_IPC
517 select COMPAT_OLD_SIGACTION
519 config SYSVIPC_COMPAT
521 depends on COMPAT && SYSVIPC
524 source "drivers/sbus/char/Kconfig"