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_ARCH_TRANSPARENT_HUGEPAGE
69 select HAVE_DYNAMIC_FTRACE
70 select HAVE_FTRACE_MCOUNT_RECORD
71 select HAVE_SYSCALL_TRACEPOINTS
72 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
98 config ARCH_PROC_KCORE_TEXT
101 config CPU_BIG_ENDIAN
108 config STACKTRACE_SUPPORT
112 config LOCKDEP_SUPPORT
116 config ARCH_HIBERNATION_POSSIBLE
117 def_bool y if SPARC64
123 config HAVE_SETUP_PER_CPU_AREA
124 def_bool y if SPARC64
126 config NEED_PER_CPU_EMBED_FIRST_CHUNK
127 def_bool y if SPARC64
129 config NEED_PER_CPU_PAGE_FIRST_CHUNK
130 def_bool y if SPARC64
144 config GENERIC_ISA_DMA
148 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
149 def_bool y if SPARC64
151 config PGTABLE_LEVELS
155 config ARCH_SUPPORTS_UPROBES
156 def_bool y if SPARC64
158 menu "Processor type and features"
161 bool "Symmetric multi-processing support"
163 This enables support for systems with more than one CPU. If you have
164 a system with only one CPU, say N. If you have a system with more
167 If you say N here, the kernel will run on uni- and multiprocessor
168 machines, but will use only one CPU of a multiprocessor machine. If
169 you say Y here, the kernel will run on many, but not all,
170 uniprocessor machines. On a uniprocessor machine, the kernel
171 will run faster if you say N here.
173 People using multiprocessor machines who say Y here should also say
174 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
175 Management" code will be disabled if you say Y here.
177 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
178 available at <http://www.tldp.org/docs.html#howto>.
180 If you don't know what to do here, say N.
183 int "Maximum number of CPUs"
185 range 2 32 if SPARC32
186 range 2 4096 if SPARC64
187 default 32 if SPARC32
188 default 4096 if SPARC64
190 source "kernel/Kconfig.hz"
192 config GENERIC_HWEIGHT
196 config GENERIC_CALIBRATE_DELAY
200 config ARCH_MAY_HAVE_PC_FDC
204 config EMULATED_CMPXCHG
208 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
209 is emulated, and therefore it is not completely atomic.
215 depends on SPARC32 && SMP
220 depends on SPARC64 && SMP
223 bool "Support for early boot text console"
227 Say Y here to enable a faster early framebuffer boot console.
230 bool "Enable seccomp to safely compute untrusted bytecode"
231 depends on SPARC64 && PROC_FS
234 This kernel feature is useful for number crunching applications
235 that may need to compute untrusted bytecode during their
236 execution. By using pipes or other transports made available to
237 the process as file descriptors supporting the read/write
238 syscalls, it's possible to isolate those applications in
239 their own address space using seccomp. Once seccomp is
240 enabled via /proc/<pid>/seccomp, it cannot be disabled
241 and the task is only allowed to execute a few safe syscalls
242 defined by each seccomp mode.
244 If unsure, say Y. Only embedded should say N here.
247 bool "Support for hot-pluggable CPUs"
248 depends on SPARC64 && SMP
250 Say Y here to experiment with turning CPUs off and on. CPUs
251 can be controlled through /sys/devices/system/cpu/cpu#.
252 Say N if you want to disable CPU hotplug.
255 source "drivers/cpufreq/Kconfig"
259 tristate "UltraSPARC-III Memory Controller driver"
263 This adds a driver for the UltraSPARC-III memory controller.
264 Loading this driver allows exact mnemonic strings to be
265 printed in the event of a memory error, so that the faulty DIMM
266 on the motherboard can be matched to the error.
268 If in doubt, say Y, as this information can be very useful.
270 # Global things across all Sun machines.
271 config GENERIC_LOCKBREAK
274 depends on SPARC64 && SMP && PREEMPTION
278 depends on SPARC64 && SMP
281 int "Maximum NUMA Nodes (as a power of 2)"
284 depends on NEED_MULTIPLE_NODES
286 Specify the maximum number of NUMA Nodes available on the target
287 system. Increases memory reserved to accommodate various tables.
289 config ARCH_SPARSEMEM_ENABLE
290 def_bool y if SPARC64
291 select SPARSEMEM_VMEMMAP_ENABLE
293 config ARCH_SPARSEMEM_DEFAULT
294 def_bool y if SPARC64
296 config FORCE_MAX_ZONEORDER
297 int "Maximum zone order"
300 The kernel memory allocator divides physically contiguous memory
301 blocks into "zones", where each zone is a power of two number of
302 pages. This option selects the largest power of two that the kernel
303 keeps in the memory allocator. If you need to allocate very large
304 blocks of physically contiguous memory, then you may need to
307 This config option is actually maximum order plus one. For example,
308 a value of 13 means that the largest free memory block is 2^12 pages.
311 source "kernel/power/Kconfig"
315 bool "SMT (Hyperthreading) scheduler support"
316 depends on SPARC64 && SMP
319 SMT scheduler support improves the CPU scheduler's decision making
320 when dealing with SPARC cpus at a cost of slightly increased overhead
321 in some places. If unsure say N here.
324 bool "Multi-core scheduler support"
325 depends on SPARC64 && SMP
328 Multi-core scheduler support improves the CPU scheduler's decision
329 making when dealing with multi-core CPU chips at a cost of slightly
330 increased overhead in some places. If unsure say N here.
333 bool "Default bootloader kernel arguments"
337 string "Initial kernel command string"
338 depends on CMDLINE_BOOL
339 default "console=ttyS0,9600 root=/dev/sda1"
341 Say Y here if you want to be able to pass default arguments to
342 the kernel. This will be overridden by the bootloader, if you
343 use one (such as SILO). This is most useful if you want to boot
344 a kernel from TFTP, and want default options to be available
345 with having them passed on the command line.
347 NOTE: This option WILL override the PROM bootargs setting!
353 Enable power management and CPU standby features on supported
357 tristate "Sun4m LED driver"
360 This driver toggles the front-panel LED on sun4m systems
361 in a user-specifiable manner. Its state can be probed
362 by reading /proc/led and its blinking mode can be changed
363 via writes to /proc/led
365 config SERIAL_CONSOLE
370 If you say Y here, it will be possible to use a serial port as the
371 system console (the system console is the device which receives all
372 kernel messages and warnings and which allows logins in single user
373 mode). This could be useful if some terminal or printer is connected
376 Even if you say Y here, the currently visible virtual console
377 (/dev/tty0) will still be used as the system console by default, but
378 you can alter that using a kernel command line option such as
379 "console=ttyS1". (Try "man bootparam" or see the documentation of
380 your boot loader (silo) about how to pass options to the kernel at
383 If you don't have a graphics card installed and you say Y here, the
384 kernel will automatically use the first serial line, /dev/ttyS0, as
390 bool "Sparc Leon processor family"
392 select USB_EHCI_BIG_ENDIAN_MMIO
393 select USB_EHCI_BIG_ENDIAN_DESC
394 select USB_UHCI_BIG_ENDIAN_MMIO
395 select USB_UHCI_BIG_ENDIAN_DESC
397 If you say Y here if you are running on a SPARC-LEON processor.
398 The LEON processor is a synthesizable VHDL model of the
399 SPARC-v8 standard. LEON is part of the GRLIB collection of
400 IP cores that are distributed under GPL. GRLIB can be downloaded
401 from www.gaisler.com. You can download a sparc-linux cross-compilation
402 toolchain at www.gaisler.com.
405 menu "U-Boot options"
407 config UBOOT_LOAD_ADDR
408 hex "uImage Load Address"
411 U-Boot kernel load address, the address in physical address space
412 where u-boot will place the Linux kernel before booting it.
413 This address is normally the base address of main memory + 0x4000.
415 config UBOOT_FLASH_ADDR
416 hex "uImage.o Load Address"
419 Optional setting only affecting the uImage.o ELF-image used to
420 download the uImage file to the target using a ELF-loader other than
421 U-Boot. It may for example be used to download an uImage to FLASH with
422 the GRMON utility before even starting u-boot.
424 config UBOOT_ENTRY_ADDR
425 hex "uImage Entry Address"
428 Do not change this unless you know what you're doing. This is
429 hardcoded by the SPARC32 and LEON port.
431 This is the virtual address u-boot jumps to when booting the Linux
439 menu "Bus options (PCI etc.)"
449 bool "Sun Logical Domains support"
452 Say Y here is you want to support virtual devices via
457 depends on PCI && SPARC32 && !SPARC_LEON
462 depends on PCI && SPARC_LEON
466 bool "GRPCI Host Bridge Support"
470 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
471 PCI host controller is typically found in GRLIB SPARC32/LEON
472 systems. The driver has one property (all_pci_errors) controlled
473 from the bootloader that makes the GRPCI to generate interrupts
474 on detected PCI Parity and System errors.
477 bool "GRPCI2 Host Bridge Support"
481 Say Y here to include the GRPCI2 Host Bridge Driver.
483 config SUN_OPENPROMFS
484 tristate "Openprom tree appears in /proc/openprom"
486 If you say Y, the OpenPROM device tree will be available as a
487 virtual file system, which you can mount to /proc/openprom by "mount
488 -t openpromfs none /proc/openprom".
490 To compile the /proc/openprom support as a module, choose M here: the
491 module will be called openpromfs.
493 Only choose N if you know in advance that you will not need to modify
494 OpenPROM settings on the running system.
500 depends on SPARC64 && PCI
502 config SPARC64_PCI_MSI
505 depends on SPARC64_PCI && PCI_MSI
513 select COMPAT_BINFMT_ELF
515 select ARCH_WANT_OLD_COMPAT_IPC
516 select COMPAT_OLD_SIGACTION
518 config SYSVIPC_COMPAT
520 depends on COMPAT && SYSVIPC
523 source "drivers/sbus/char/Kconfig"