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1config 64BIT
2 bool "64-bit kernel" if ARCH = "sparc"
3 default ARCH = "sparc64"
4 help
5 SPARC is a family of RISC microprocessors designed and marketed by
6 Sun Microsystems, incorporated. They are very widely found in Sun
7 workstations and clones.
8
9 Say yes to build a 64-bit kernel - formerly known as sparc64
10 Say no to build a 32-bit kernel - formerly known as sparc
11
12config SPARC
13 bool
14 default y
15 select OF
16 select OF_PROMTREE
17 select HAVE_IDE
18 select HAVE_OPROFILE
19 select HAVE_ARCH_KGDB if !SMP || SPARC64
20 select HAVE_ARCH_TRACEHOOK
21 select ARCH_WANT_OPTIONAL_GPIOLIB
22 select RTC_CLASS
23 select RTC_DRV_M48T59
24 select HAVE_IRQ_WORK
25 select HAVE_DMA_ATTRS
26 select HAVE_DMA_API_DEBUG
27 select HAVE_ARCH_JUMP_LABEL
28 select HAVE_GENERIC_HARDIRQS
29 select GENERIC_IRQ_SHOW
30 select USE_GENERIC_SMP_HELPERS if SMP
31
32config SPARC32
33 def_bool !64BIT
34
35config SPARC64
36 def_bool 64BIT
37 select ARCH_SUPPORTS_MSI
38 select HAVE_FUNCTION_TRACER
39 select HAVE_FUNCTION_GRAPH_TRACER
40 select HAVE_FUNCTION_GRAPH_FP_TEST
41 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
42 select HAVE_KRETPROBES
43 select HAVE_KPROBES
44 select HAVE_RCU_TABLE_FREE if SMP
45 select HAVE_MEMBLOCK
46 select HAVE_SYSCALL_WRAPPERS
47 select HAVE_DYNAMIC_FTRACE
48 select HAVE_FTRACE_MCOUNT_RECORD
49 select HAVE_SYSCALL_TRACEPOINTS
50 select RTC_DRV_CMOS
51 select RTC_DRV_BQ4802
52 select RTC_DRV_SUN4V
53 select RTC_DRV_STARFIRE
54 select HAVE_PERF_EVENTS
55 select PERF_USE_VMALLOC
56 select IRQ_PREFLOW_FASTEOI
57 select ARCH_HAVE_NMI_SAFE_CMPXCHG
58 select HAVE_C_RECORDMCOUNT
59
60config ARCH_DEFCONFIG
61 string
62 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
63 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
64
65# CONFIG_BITS can be used at source level to get 32/64 bits
66config BITS
67 int
68 default 32 if SPARC32
69 default 64 if SPARC64
70
71config ARCH_USES_GETTIMEOFFSET
72 bool
73 default y if SPARC32
74
75config GENERIC_CMOS_UPDATE
76 bool
77 default y
78
79config GENERIC_CLOCKEVENTS
80 bool
81 default y if SPARC64
82
83config IOMMU_HELPER
84 bool
85 default y if SPARC64
86
87config STACKTRACE_SUPPORT
88 bool
89 default y if SPARC64
90
91config LOCKDEP_SUPPORT
92 bool
93 default y if SPARC64
94
95config HAVE_LATENCYTOP_SUPPORT
96 bool
97 default y if SPARC64
98
99config AUDIT_ARCH
100 bool
101 default y
102
103config HAVE_SETUP_PER_CPU_AREA
104 def_bool y if SPARC64
105
106config NEED_PER_CPU_EMBED_FIRST_CHUNK
107 def_bool y if SPARC64
108
109config NEED_PER_CPU_PAGE_FIRST_CHUNK
110 def_bool y if SPARC64
111
112config MMU
113 bool
114 default y
115
116config HIGHMEM
117 bool
118 default y if SPARC32
119
120config ZONE_DMA
121 bool
122 default y if SPARC32
123
124config NEED_DMA_MAP_STATE
125 def_bool y
126
127config NEED_SG_DMA_LENGTH
128 def_bool y
129
130config GENERIC_ISA_DMA
131 bool
132 default y if SPARC32
133
134config GENERIC_GPIO
135 bool
136 help
137 Generic GPIO API support
138
139config ARCH_NO_VIRT_TO_BUS
140 def_bool y
141
142config ARCH_SUPPORTS_DEBUG_PAGEALLOC
143 def_bool y if SPARC64
144
145source "init/Kconfig"
146
147source "kernel/Kconfig.freezer"
148
149menu "Processor type and features"
150
151config SMP
152 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
153 ---help---
154 This enables support for systems with more than one CPU. If you have
155 a system with only one CPU, say N. If you have a system with more
156 than one CPU, say Y.
157
158 If you say N here, the kernel will run on single and multiprocessor
159 machines, but will use only one CPU of a multiprocessor machine. If
160 you say Y here, the kernel will run on many, but not all,
161 singleprocessor machines. On a singleprocessor machine, the kernel
162 will run faster if you say N here.
163
164 People using multiprocessor machines who say Y here should also say
165 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
166 Management" code will be disabled if you say Y here.
167
168 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
169 available at <http://www.tldp.org/docs.html#howto>.
170
171 If you don't know what to do here, say N.
172
173config NR_CPUS
174 int "Maximum number of CPUs"
175 depends on SMP
176 range 2 32 if SPARC32
177 range 2 1024 if SPARC64
178 default 32 if SPARC32
179 default 64 if SPARC64
180
181source kernel/Kconfig.hz
182
183config RWSEM_GENERIC_SPINLOCK
184 bool
185 default y if SPARC32
186
187config RWSEM_XCHGADD_ALGORITHM
188 bool
189 default y if SPARC64
190
191config GENERIC_HWEIGHT
192 bool
193 default y if !ULTRA_HAS_POPULATION_COUNT
194
195config GENERIC_CALIBRATE_DELAY
196 bool
197 default y
198
199config ARCH_MAY_HAVE_PC_FDC
200 bool
201 default y
202
203config EMULATED_CMPXCHG
204 bool
205 default y if SPARC32
206 help
207 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
208 is emulated, and therefore it is not completely atomic.
209
210# Makefile helpers
211config SPARC32_SMP
212 bool
213 default y
214 depends on SPARC32 && SMP
215
216config SPARC64_SMP
217 bool
218 default y
219 depends on SPARC64 && SMP
220
221config EARLYFB
222 bool "Support for early boot text console"
223 default y
224 depends on SPARC64
225 help
226 Say Y here to enable a faster early framebuffer boot console.
227
228choice
229 prompt "Kernel page size" if SPARC64
230 default SPARC64_PAGE_SIZE_8KB
231
232config SPARC64_PAGE_SIZE_8KB
233 bool "8KB"
234 help
235 This lets you select the page size of the kernel.
236
237 8KB and 64KB work quite well, since SPARC ELF sections
238 provide for up to 64KB alignment.
239
240 If you don't know what to do, choose 8KB.
241
242config SPARC64_PAGE_SIZE_64KB
243 bool "64KB"
244
245endchoice
246
247config SECCOMP
248 bool "Enable seccomp to safely compute untrusted bytecode"
249 depends on SPARC64 && PROC_FS
250 default y
251 help
252 This kernel feature is useful for number crunching applications
253 that may need to compute untrusted bytecode during their
254 execution. By using pipes or other transports made available to
255 the process as file descriptors supporting the read/write
256 syscalls, it's possible to isolate those applications in
257 their own address space using seccomp. Once seccomp is
258 enabled via /proc/<pid>/seccomp, it cannot be disabled
259 and the task is only allowed to execute a few safe syscalls
260 defined by each seccomp mode.
261
262 If unsure, say Y. Only embedded should say N here.
263
264config HOTPLUG_CPU
265 bool "Support for hot-pluggable CPUs"
266 depends on SPARC64 && SMP
267 select HOTPLUG
268 help
269 Say Y here to experiment with turning CPUs off and on. CPUs
270 can be controlled through /sys/devices/system/cpu/cpu#.
271 Say N if you want to disable CPU hotplug.
272
273source "kernel/time/Kconfig"
274
275if SPARC64
276source "drivers/cpufreq/Kconfig"
277
278config US3_FREQ
279 tristate "UltraSPARC-III CPU Frequency driver"
280 depends on CPU_FREQ
281 select CPU_FREQ_TABLE
282 help
283 This adds the CPUFreq driver for UltraSPARC-III processors.
284
285 For details, take a look at <file:Documentation/cpu-freq>.
286
287 If in doubt, say N.
288
289config US2E_FREQ
290 tristate "UltraSPARC-IIe CPU Frequency driver"
291 depends on CPU_FREQ
292 select CPU_FREQ_TABLE
293 help
294 This adds the CPUFreq driver for UltraSPARC-IIe processors.
295
296 For details, take a look at <file:Documentation/cpu-freq>.
297
298 If in doubt, say N.
299
300endif
301
302config US3_MC
303 tristate "UltraSPARC-III Memory Controller driver"
304 depends on SPARC64
305 default y
306 help
307 This adds a driver for the UltraSPARC-III memory controller.
308 Loading this driver allows exact mnemonic strings to be
309 printed in the event of a memory error, so that the faulty DIMM
310 on the motherboard can be matched to the error.
311
312 If in doubt, say Y, as this information can be very useful.
313
314# Global things across all Sun machines.
315config GENERIC_LOCKBREAK
316 bool
317 default y
318 depends on SPARC64 && SMP && PREEMPT
319
320choice
321 prompt "SPARC64 Huge TLB Page Size"
322 depends on SPARC64 && HUGETLB_PAGE
323 default HUGETLB_PAGE_SIZE_4MB
324
325config HUGETLB_PAGE_SIZE_4MB
326 bool "4MB"
327
328config HUGETLB_PAGE_SIZE_512K
329 bool "512K"
330
331config HUGETLB_PAGE_SIZE_64K
332 depends on !SPARC64_PAGE_SIZE_64KB
333 bool "64K"
334
335endchoice
336
337config NUMA
338 bool "NUMA support"
339 depends on SPARC64 && SMP
340
341config NODES_SHIFT
342 int
343 default "4"
344 depends on NEED_MULTIPLE_NODES
345
346# Some NUMA nodes have memory ranges that span
347# other nodes. Even though a pfn is valid and
348# between a node's start and end pfns, it may not
349# reside on that node. See memmap_init_zone()
350# for details.
351config NODES_SPAN_OTHER_NODES
352 def_bool y
353 depends on NEED_MULTIPLE_NODES
354
355config ARCH_POPULATES_NODE_MAP
356 def_bool y if SPARC64
357
358config ARCH_SELECT_MEMORY_MODEL
359 def_bool y if SPARC64
360
361config ARCH_SPARSEMEM_ENABLE
362 def_bool y if SPARC64
363 select SPARSEMEM_VMEMMAP_ENABLE
364
365config ARCH_SPARSEMEM_DEFAULT
366 def_bool y if SPARC64
367
368source "mm/Kconfig"
369
370config SCHED_SMT
371 bool "SMT (Hyperthreading) scheduler support"
372 depends on SPARC64 && SMP
373 default y
374 help
375 SMT scheduler support improves the CPU scheduler's decision making
376 when dealing with SPARC cpus at a cost of slightly increased overhead
377 in some places. If unsure say N here.
378
379config SCHED_MC
380 bool "Multi-core scheduler support"
381 depends on SPARC64 && SMP
382 default y
383 help
384 Multi-core scheduler support improves the CPU scheduler's decision
385 making when dealing with multi-core CPU chips at a cost of slightly
386 increased overhead in some places. If unsure say N here.
387
388if SPARC64
389source "kernel/Kconfig.preempt"
390endif
391
392config CMDLINE_BOOL
393 bool "Default bootloader kernel arguments"
394 depends on SPARC64
395
396config CMDLINE
397 string "Initial kernel command string"
398 depends on CMDLINE_BOOL
399 default "console=ttyS0,9600 root=/dev/sda1"
400 help
401 Say Y here if you want to be able to pass default arguments to
402 the kernel. This will be overridden by the bootloader, if you
403 use one (such as SILO). This is most useful if you want to boot
404 a kernel from TFTP, and want default options to be available
405 with having them passed on the command line.
406
407 NOTE: This option WILL override the PROM bootargs setting!
408
409config SUN_PM
410 bool
411 default y if SPARC32
412 help
413 Enable power management and CPU standby features on supported
414 SPARC platforms.
415
416config SPARC_LED
417 tristate "Sun4m LED driver"
418 depends on SPARC32
419 help
420 This driver toggles the front-panel LED on sun4m systems
421 in a user-specifiable manner. Its state can be probed
422 by reading /proc/led and its blinking mode can be changed
423 via writes to /proc/led
424
425config SERIAL_CONSOLE
426 bool
427 depends on SPARC32
428 default y
429 ---help---
430 If you say Y here, it will be possible to use a serial port as the
431 system console (the system console is the device which receives all
432 kernel messages and warnings and which allows logins in single user
433 mode). This could be useful if some terminal or printer is connected
434 to that serial port.
435
436 Even if you say Y here, the currently visible virtual console
437 (/dev/tty0) will still be used as the system console by default, but
438 you can alter that using a kernel command line option such as
439 "console=ttyS1". (Try "man bootparam" or see the documentation of
440 your boot loader (silo) about how to pass options to the kernel at
441 boot time.)
442
443 If you don't have a graphics card installed and you say Y here, the
444 kernel will automatically use the first serial line, /dev/ttyS0, as
445 system console.
446
447 If unsure, say N.
448
449config SPARC_LEON
450 bool "Sparc Leon processor family"
451 depends on SPARC32
452 ---help---
453 If you say Y here if you are running on a SPARC-LEON processor.
454 The LEON processor is a synthesizable VHDL model of the
455 SPARC-v8 standard. LEON is part of the GRLIB collection of
456 IP cores that are distributed under GPL. GRLIB can be downloaded
457 from www.gaisler.com. You can download a sparc-linux cross-compilation
458 toolchain at www.gaisler.com.
459
460if SPARC_LEON
461menu "U-Boot options"
462
463config UBOOT_LOAD_ADDR
464 hex "uImage Load Address"
465 default 0x40004000
466 ---help---
467 U-Boot kernel load address, the address in physical address space
468 where u-boot will place the Linux kernel before booting it.
469 This address is normally the base address of main memory + 0x4000.
470
471config UBOOT_FLASH_ADDR
472 hex "uImage.o Load Address"
473 default 0x00080000
474 ---help---
475 Optional setting only affecting the uImage.o ELF-image used to
476 download the uImage file to the target using a ELF-loader other than
477 U-Boot. It may for example be used to download an uImage to FLASH with
478 the GRMON utility before even starting u-boot.
479
480config UBOOT_ENTRY_ADDR
481 hex "uImage Entry Address"
482 default 0xf0004000
483 ---help---
484 Do not change this unless you know what you're doing. This is
485 hardcoded by the SPARC32 and LEON port.
486
487 This is the virtual address u-boot jumps to when booting the Linux
488 Kernel.
489
490endmenu
491endif
492
493endmenu
494
495menu "Bus options (PCI etc.)"
496config SBUS
497 bool
498 default y
499
500config SBUSCHAR
501 bool
502 default y
503
504config SUN_LDOMS
505 bool "Sun Logical Domains support"
506 depends on SPARC64
507 help
508 Say Y here is you want to support virtual devices via
509 Logical Domains.
510
511config PCI
512 bool "Support for PCI and PS/2 keyboard/mouse"
513 help
514 Find out whether your system includes a PCI bus. PCI is the name of
515 a bus system, i.e. the way the CPU talks to the other stuff inside
516 your box. If you say Y here, the kernel will include drivers and
517 infrastructure code to support PCI bus devices.
518
519 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
520 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
521 All of these platforms are extremely obscure, so say N if unsure.
522
523config PCI_DOMAINS
524 def_bool PCI if SPARC64
525
526config PCI_SYSCALL
527 def_bool PCI
528
529config PCIC_PCI
530 bool
531 depends on PCI && SPARC32 && !SPARC_LEON
532 default y
533
534config LEON_PCI
535 bool
536 depends on PCI && SPARC_LEON
537 default y
538
539config GRPCI2
540 bool "GRPCI2 Host Bridge Support"
541 depends on LEON_PCI
542 default y
543 help
544 Say Y here to include the GRPCI2 Host Bridge Driver.
545
546source "drivers/pci/Kconfig"
547
548source "drivers/pcmcia/Kconfig"
549
550config SUN_OPENPROMFS
551 tristate "Openprom tree appears in /proc/openprom"
552 help
553 If you say Y, the OpenPROM device tree will be available as a
554 virtual file system, which you can mount to /proc/openprom by "mount
555 -t openpromfs none /proc/openprom".
556
557 To compile the /proc/openprom support as a module, choose M here: the
558 module will be called openpromfs.
559
560 Only choose N if you know in advance that you will not need to modify
561 OpenPROM settings on the running system.
562
563# Makefile helpers
564config SPARC32_PCI
565 bool
566 default y
567 depends on SPARC32 && PCI
568
569config SPARC64_PCI
570 bool
571 default y
572 depends on SPARC64 && PCI
573
574endmenu
575
576menu "Executable file formats"
577
578source "fs/Kconfig.binfmt"
579
580config COMPAT
581 bool
582 depends on SPARC64
583 default y
584 select COMPAT_BINFMT_ELF
585
586config SYSVIPC_COMPAT
587 bool
588 depends on COMPAT && SYSVIPC
589 default y
590
591endmenu
592
593source "net/Kconfig"
594
595source "drivers/Kconfig"
596
597source "drivers/sbus/char/Kconfig"
598
599source "fs/Kconfig"
600
601source "arch/sparc/Kconfig.debug"
602
603source "security/Kconfig"
604
605source "crypto/Kconfig"
606
607source "lib/Kconfig"
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_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
17 select ARCH_MIGHT_HAVE_PC_SERIO
18 select DMA_OPS
19 select OF
20 select OF_PROMTREE
21 select HAVE_ASM_MODVERSIONS
22 select HAVE_ARCH_KGDB if !SMP || SPARC64
23 select HAVE_ARCH_TRACEHOOK
24 select HAVE_ARCH_SECCOMP if SPARC64
25 select HAVE_EXIT_THREAD
26 select HAVE_PCI
27 select SYSCTL_EXCEPTION_TRACE
28 select RTC_CLASS
29 select RTC_DRV_M48T59
30 select RTC_SYSTOHC
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_STRNCPY_FROM_USER
41 select GENERIC_STRNLEN_USER
42 select MODULES_USE_ELF_RELA
43 select PCI_SYSCALL if PCI
44 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
45 select ODD_RT_SIGACTION
46 select OLD_SIGSUSPEND
47 select CPU_NO_EFFICIENT_FFS
48 select LOCKDEP_SMALL if LOCKDEP
49 select NEED_DMA_MAP_STATE
50 select NEED_SG_DMA_LENGTH
51 select SET_FS
52
53config SPARC32
54 def_bool !64BIT
55 select ARCH_32BIT_OFF_T
56 select ARCH_HAS_SYNC_DMA_FOR_CPU
57 select GENERIC_ATOMIC64
58 select CLZ_TAB
59 select HAVE_UID16
60 select OLD_SIGACTION
61 select ZONE_DMA
62
63config SPARC64
64 def_bool 64BIT
65 select HAVE_FUNCTION_TRACER
66 select HAVE_FUNCTION_GRAPH_TRACER
67 select HAVE_KRETPROBES
68 select HAVE_KPROBES
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
75 select HAVE_TIF_NOHZ
76 select HAVE_DEBUG_KMEMLEAK
77 select IOMMU_HELPER
78 select SPARSE_IRQ
79 select RTC_DRV_CMOS
80 select RTC_DRV_BQ4802
81 select RTC_DRV_SUN4V
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
89 select ARCH_SUPPORTS_DEBUG_PAGEALLOC
90 select HAVE_NMI
91 select HAVE_REGS_AND_STACK_ACCESS_API
92 select ARCH_USE_QUEUED_RWLOCKS
93 select ARCH_USE_QUEUED_SPINLOCKS
94 select GENERIC_TIME_VSYSCALL
95 select ARCH_CLOCKSOURCE_DATA
96 select ARCH_HAS_PTE_SPECIAL
97 select PCI_DOMAINS if PCI
98 select ARCH_HAS_GIGANTIC_PAGE
99 select HAVE_SOFTIRQ_ON_OWN_STACK
100
101config ARCH_PROC_KCORE_TEXT
102 def_bool y
103
104config CPU_BIG_ENDIAN
105 def_bool y
106
107config ARCH_ATU
108 bool
109 default y if SPARC64
110
111config STACKTRACE_SUPPORT
112 bool
113 default y if SPARC64
114
115config LOCKDEP_SUPPORT
116 bool
117 default y if SPARC64
118
119config ARCH_HIBERNATION_POSSIBLE
120 def_bool y if SPARC64
121
122config AUDIT_ARCH
123 bool
124 default y
125
126config HAVE_SETUP_PER_CPU_AREA
127 def_bool y if SPARC64
128
129config NEED_PER_CPU_EMBED_FIRST_CHUNK
130 def_bool y if SPARC64
131
132config NEED_PER_CPU_PAGE_FIRST_CHUNK
133 def_bool y if SPARC64
134
135config MMU
136 bool
137 default y
138
139config HIGHMEM
140 bool
141 default y if SPARC32
142 select KMAP_LOCAL
143
144config GENERIC_ISA_DMA
145 bool
146 default y if SPARC32
147
148config PGTABLE_LEVELS
149 default 4 if 64BIT
150 default 3
151
152config ARCH_SUPPORTS_UPROBES
153 def_bool y if SPARC64
154
155menu "Processor type and features"
156
157config SMP
158 bool "Symmetric multi-processing support"
159 help
160 This enables support for systems with more than one CPU. If you have
161 a system with only one CPU, say N. If you have a system with more
162 than one CPU, say Y.
163
164 If you say N here, the kernel will run on uni- and multiprocessor
165 machines, but will use only one CPU of a multiprocessor machine. If
166 you say Y here, the kernel will run on many, but not all,
167 uniprocessor machines. On a uniprocessor machine, the kernel
168 will run faster if you say N here.
169
170 People using multiprocessor machines who say Y here should also say
171 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
172 Management" code will be disabled if you say Y here.
173
174 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
175 available at <https://www.tldp.org/docs.html#howto>.
176
177 If you don't know what to do here, say N.
178
179config NR_CPUS
180 int "Maximum number of CPUs"
181 depends on SMP
182 range 2 32 if SPARC32
183 range 2 4096 if SPARC64
184 default 32 if SPARC32
185 default 4096 if SPARC64
186
187source "kernel/Kconfig.hz"
188
189config GENERIC_HWEIGHT
190 bool
191 default y
192
193config GENERIC_CALIBRATE_DELAY
194 bool
195 default y
196
197config ARCH_MAY_HAVE_PC_FDC
198 bool
199 default y
200
201config EMULATED_CMPXCHG
202 bool
203 default y if SPARC32
204 help
205 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
206 is emulated, and therefore it is not completely atomic.
207
208# Makefile helpers
209config SPARC32_SMP
210 bool
211 default y
212 depends on SPARC32 && SMP
213
214config SPARC64_SMP
215 bool
216 default y
217 depends on SPARC64 && SMP
218
219config EARLYFB
220 bool "Support for early boot text console"
221 default y
222 depends on SPARC64
223 help
224 Say Y here to enable a faster early framebuffer boot console.
225
226config HOTPLUG_CPU
227 bool "Support for hot-pluggable CPUs"
228 depends on SPARC64 && SMP
229 help
230 Say Y here to experiment with turning CPUs off and on. CPUs
231 can be controlled through /sys/devices/system/cpu/cpu#.
232 Say N if you want to disable CPU hotplug.
233
234if SPARC64
235source "drivers/cpufreq/Kconfig"
236endif
237
238config US3_MC
239 tristate "UltraSPARC-III Memory Controller driver"
240 depends on SPARC64
241 default y
242 help
243 This adds a driver for the UltraSPARC-III memory controller.
244 Loading this driver allows exact mnemonic strings to be
245 printed in the event of a memory error, so that the faulty DIMM
246 on the motherboard can be matched to the error.
247
248 If in doubt, say Y, as this information can be very useful.
249
250# Global things across all Sun machines.
251config GENERIC_LOCKBREAK
252 bool
253 default y
254 depends on SPARC64 && SMP && PREEMPTION
255
256config NUMA
257 bool "NUMA support"
258 depends on SPARC64 && SMP
259
260config NODES_SHIFT
261 int "Maximum NUMA Nodes (as a power of 2)"
262 range 4 5 if SPARC64
263 default "5"
264 depends on NUMA
265 help
266 Specify the maximum number of NUMA Nodes available on the target
267 system. Increases memory reserved to accommodate various tables.
268
269config ARCH_SPARSEMEM_ENABLE
270 def_bool y if SPARC64
271 select SPARSEMEM_VMEMMAP_ENABLE
272
273config ARCH_SPARSEMEM_DEFAULT
274 def_bool y if SPARC64
275
276config FORCE_MAX_ZONEORDER
277 int "Maximum zone order"
278 default "13"
279 help
280 The kernel memory allocator divides physically contiguous memory
281 blocks into "zones", where each zone is a power of two number of
282 pages. This option selects the largest power of two that the kernel
283 keeps in the memory allocator. If you need to allocate very large
284 blocks of physically contiguous memory, then you may need to
285 increase this value.
286
287 This config option is actually maximum order plus one. For example,
288 a value of 13 means that the largest free memory block is 2^12 pages.
289
290if SPARC64
291source "kernel/power/Kconfig"
292endif
293
294config SCHED_SMT
295 bool "SMT (Hyperthreading) scheduler support"
296 depends on SPARC64 && SMP
297 default y
298 help
299 SMT scheduler support improves the CPU scheduler's decision making
300 when dealing with SPARC cpus at a cost of slightly increased overhead
301 in some places. If unsure say N here.
302
303config SCHED_MC
304 bool "Multi-core scheduler support"
305 depends on SPARC64 && SMP
306 default y
307 help
308 Multi-core scheduler support improves the CPU scheduler's decision
309 making when dealing with multi-core CPU chips at a cost of slightly
310 increased overhead in some places. If unsure say N here.
311
312config CMDLINE_BOOL
313 bool "Default bootloader kernel arguments"
314 depends on SPARC64
315
316config CMDLINE
317 string "Initial kernel command string"
318 depends on CMDLINE_BOOL
319 default "console=ttyS0,9600 root=/dev/sda1"
320 help
321 Say Y here if you want to be able to pass default arguments to
322 the kernel. This will be overridden by the bootloader, if you
323 use one (such as SILO). This is most useful if you want to boot
324 a kernel from TFTP, and want default options to be available
325 with having them passed on the command line.
326
327 NOTE: This option WILL override the PROM bootargs setting!
328
329config SUN_PM
330 bool
331 default y if SPARC32
332 help
333 Enable power management and CPU standby features on supported
334 SPARC platforms.
335
336config SPARC_LED
337 tristate "Sun4m LED driver"
338 depends on SPARC32
339 help
340 This driver toggles the front-panel LED on sun4m systems
341 in a user-specifiable manner. Its state can be probed
342 by reading /proc/led and its blinking mode can be changed
343 via writes to /proc/led
344
345config SERIAL_CONSOLE
346 bool
347 depends on SPARC32
348 default y
349 help
350 If you say Y here, it will be possible to use a serial port as the
351 system console (the system console is the device which receives all
352 kernel messages and warnings and which allows logins in single user
353 mode). This could be useful if some terminal or printer is connected
354 to that serial port.
355
356 Even if you say Y here, the currently visible virtual console
357 (/dev/tty0) will still be used as the system console by default, but
358 you can alter that using a kernel command line option such as
359 "console=ttyS1". (Try "man bootparam" or see the documentation of
360 your boot loader (silo) about how to pass options to the kernel at
361 boot time.)
362
363 If you don't have a graphics card installed and you say Y here, the
364 kernel will automatically use the first serial line, /dev/ttyS0, as
365 system console.
366
367 If unsure, say N.
368
369config SPARC_LEON
370 bool "Sparc Leon processor family"
371 depends on SPARC32
372 select USB_EHCI_BIG_ENDIAN_MMIO
373 select USB_EHCI_BIG_ENDIAN_DESC
374 select USB_UHCI_BIG_ENDIAN_MMIO
375 select USB_UHCI_BIG_ENDIAN_DESC
376 help
377 If you say Y here if you are running on a SPARC-LEON processor.
378 The LEON processor is a synthesizable VHDL model of the
379 SPARC-v8 standard. LEON is part of the GRLIB collection of
380 IP cores that are distributed under GPL. GRLIB can be downloaded
381 from www.gaisler.com. You can download a sparc-linux cross-compilation
382 toolchain at www.gaisler.com.
383
384if SPARC_LEON
385menu "U-Boot options"
386
387config UBOOT_LOAD_ADDR
388 hex "uImage Load Address"
389 default 0x40004000
390 help
391 U-Boot kernel load address, the address in physical address space
392 where u-boot will place the Linux kernel before booting it.
393 This address is normally the base address of main memory + 0x4000.
394
395config UBOOT_FLASH_ADDR
396 hex "uImage.o Load Address"
397 default 0x00080000
398 help
399 Optional setting only affecting the uImage.o ELF-image used to
400 download the uImage file to the target using a ELF-loader other than
401 U-Boot. It may for example be used to download an uImage to FLASH with
402 the GRMON utility before even starting u-boot.
403
404config UBOOT_ENTRY_ADDR
405 hex "uImage Entry Address"
406 default 0xf0004000
407 help
408 Do not change this unless you know what you're doing. This is
409 hardcoded by the SPARC32 and LEON port.
410
411 This is the virtual address u-boot jumps to when booting the Linux
412 Kernel.
413
414endmenu
415endif
416
417endmenu
418
419menu "Bus options (PCI etc.)"
420config SBUS
421 bool
422 default y
423
424config SBUSCHAR
425 bool
426 default y
427
428config SUN_LDOMS
429 bool "Sun Logical Domains support"
430 depends on SPARC64
431 help
432 Say Y here is you want to support virtual devices via
433 Logical Domains.
434
435config PCIC_PCI
436 bool
437 depends on PCI && SPARC32 && !SPARC_LEON
438 default y
439
440config LEON_PCI
441 bool
442 depends on PCI && SPARC_LEON
443 default y
444
445config SPARC_GRPCI1
446 bool "GRPCI Host Bridge Support"
447 depends on LEON_PCI
448 default y
449 help
450 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
451 PCI host controller is typically found in GRLIB SPARC32/LEON
452 systems. The driver has one property (all_pci_errors) controlled
453 from the bootloader that makes the GRPCI to generate interrupts
454 on detected PCI Parity and System errors.
455
456config SPARC_GRPCI2
457 bool "GRPCI2 Host Bridge Support"
458 depends on LEON_PCI
459 default y
460 help
461 Say Y here to include the GRPCI2 Host Bridge Driver.
462
463config SUN_OPENPROMFS
464 tristate "Openprom tree appears in /proc/openprom"
465 help
466 If you say Y, the OpenPROM device tree will be available as a
467 virtual file system, which you can mount to /proc/openprom by "mount
468 -t openpromfs none /proc/openprom".
469
470 To compile the /proc/openprom support as a module, choose M here: the
471 module will be called openpromfs.
472
473 Only choose N if you know in advance that you will not need to modify
474 OpenPROM settings on the running system.
475
476# Makefile helpers
477config SPARC64_PCI
478 bool
479 default y
480 depends on SPARC64 && PCI
481
482config SPARC64_PCI_MSI
483 bool
484 default y
485 depends on SPARC64_PCI && PCI_MSI
486
487endmenu
488
489config COMPAT
490 bool
491 depends on SPARC64
492 default y
493 select HAVE_UID16
494 select ARCH_WANT_OLD_COMPAT_IPC
495 select COMPAT_OLD_SIGACTION
496
497config SYSVIPC_COMPAT
498 bool
499 depends on COMPAT && SYSVIPC
500 default y
501
502source "drivers/sbus/char/Kconfig"