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 MODULES_USE_ELF_RELA
41	select PCI_SYSCALL if PCI
42	select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
43	select ODD_RT_SIGACTION
44	select OLD_SIGSUSPEND
45	select CPU_NO_EFFICIENT_FFS
46	select LOCKDEP_SMALL if LOCKDEP
47	select NEED_DMA_MAP_STATE
48	select NEED_SG_DMA_LENGTH
49	select TRACE_IRQFLAGS_SUPPORT
50
51config SPARC32
52	def_bool !64BIT
53	select ARCH_32BIT_OFF_T
54	select ARCH_HAS_SYNC_DMA_FOR_CPU
55	select CLZ_TAB
56	select DMA_DIRECT_REMAP
57	select GENERIC_ATOMIC64
58	select HAVE_UID16
59	select OLD_SIGACTION
60	select ZONE_DMA
61
62config SPARC64
63	def_bool 64BIT
64	select ALTERNATE_USER_ADDRESS_SPACE
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 MMU_GATHER_MERGE_VMAS
71	select MMU_GATHER_NO_FLUSH_CACHE
72	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
73	select HAVE_DYNAMIC_FTRACE
74	select HAVE_FTRACE_MCOUNT_RECORD
75	select HAVE_SYSCALL_TRACEPOINTS
76	select HAVE_CONTEXT_TRACKING_USER
77	select HAVE_TIF_NOHZ
78	select HAVE_DEBUG_KMEMLEAK
79	select IOMMU_HELPER
80	select SPARSE_IRQ
81	select RTC_DRV_CMOS
82	select RTC_DRV_BQ4802
83	select RTC_DRV_SUN4V
84	select RTC_DRV_STARFIRE
85	select HAVE_PERF_EVENTS
86	select PERF_USE_VMALLOC
87	select ARCH_HAVE_NMI_SAFE_CMPXCHG
88	select HAVE_C_RECORDMCOUNT
89	select HAVE_ARCH_AUDITSYSCALL
90	select ARCH_SUPPORTS_ATOMIC_RMW
91	select ARCH_SUPPORTS_DEBUG_PAGEALLOC
92	select HAVE_NMI
93	select HAVE_REGS_AND_STACK_ACCESS_API
94	select ARCH_USE_QUEUED_RWLOCKS
95	select ARCH_USE_QUEUED_SPINLOCKS
96	select GENERIC_TIME_VSYSCALL
97	select ARCH_CLOCKSOURCE_DATA
98	select ARCH_HAS_PTE_SPECIAL
99	select PCI_DOMAINS if PCI
100	select ARCH_HAS_GIGANTIC_PAGE
101	select HAVE_SOFTIRQ_ON_OWN_STACK
102	select HAVE_SETUP_PER_CPU_AREA
103	select NEED_PER_CPU_EMBED_FIRST_CHUNK
104	select NEED_PER_CPU_PAGE_FIRST_CHUNK
105
106config ARCH_PROC_KCORE_TEXT
107	def_bool y
108
109config CPU_BIG_ENDIAN
110	def_bool y
111
112config ARCH_ATU
113	bool
114	default y if SPARC64
115
116config STACKTRACE_SUPPORT
117	bool
118	default y if SPARC64
119
120config LOCKDEP_SUPPORT
121	bool
122	default y if SPARC64
123
124config ARCH_HIBERNATION_POSSIBLE
125	def_bool y if SPARC64
126
127config AUDIT_ARCH
128	bool
129	default y
130
131config MMU
132	bool
133	default y
134
135config HIGHMEM
136	bool
137	default y if SPARC32
138	select KMAP_LOCAL
139
140config GENERIC_ISA_DMA
141	bool
142	default y if SPARC32
143
144config PGTABLE_LEVELS
145	default 4 if 64BIT
146	default 3
147
148config ARCH_SUPPORTS_UPROBES
149	def_bool y if SPARC64
150
151menu "Processor type and features"
152
153config SMP
154	bool "Symmetric multi-processing support"
155	help
156	  This enables support for systems with more than one CPU. If you have
157	  a system with only one CPU, say N. If you have a system with more
158	  than one CPU, say Y.
159
160	  If you say N here, the kernel will run on uni- and multiprocessor
161	  machines, but will use only one CPU of a multiprocessor machine. If
162	  you say Y here, the kernel will run on many, but not all,
163	  uniprocessor machines. On a uniprocessor machine, the kernel
164	  will run faster if you say N here.
165
166	  People using multiprocessor machines who say Y here should also say
167	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
168	  Management" code will be disabled if you say Y here.
169
170	  See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
171	  available at <https://www.tldp.org/docs.html#howto>.
172
173	  If you don't know what to do here, say N.
174
175config NR_CPUS
176	int "Maximum number of CPUs"
177	depends on SMP
178	range 2 32 if SPARC32
179	range 2 4096 if SPARC64
180	default 32 if SPARC32
181	default 4096 if SPARC64
182
183source "kernel/Kconfig.hz"
184
185config GENERIC_HWEIGHT
186	bool
187	default y
188
189config GENERIC_CALIBRATE_DELAY
190	bool
191	default y
192
193config ARCH_MAY_HAVE_PC_FDC
194	bool
195	default y
196
197config EMULATED_CMPXCHG
198	bool
199	default y if SPARC32
200	help
201	  Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
202	  is emulated, and therefore it is not completely atomic.
203
204# Makefile helpers
205config SPARC32_SMP
206	bool
207	default y
208	depends on SPARC32 && SMP
209
210config SPARC64_SMP
211	bool
212	default y
213	depends on SPARC64 && SMP
214
215config EARLYFB
216	bool "Support for early boot text console"
217	default y
218	depends on SPARC64
219	help
220	  Say Y here to enable a faster early framebuffer boot console.
221
222config HOTPLUG_CPU
223	bool "Support for hot-pluggable CPUs"
224	depends on SPARC64 && SMP
225	help
226	  Say Y here to experiment with turning CPUs off and on.  CPUs
227	  can be controlled through /sys/devices/system/cpu/cpu#.
228	  Say N if you want to disable CPU hotplug.
229
230if SPARC64
231source "drivers/cpufreq/Kconfig"
232endif
233
234config US3_MC
235	tristate "UltraSPARC-III Memory Controller driver"
236	depends on SPARC64
237	default y
238	help
239	  This adds a driver for the UltraSPARC-III memory controller.
240	  Loading this driver allows exact mnemonic strings to be
241	  printed in the event of a memory error, so that the faulty DIMM
242	  on the motherboard can be matched to the error.
243
244	  If in doubt, say Y, as this information can be very useful.
245
246# Global things across all Sun machines.
247config GENERIC_LOCKBREAK
248	bool
249	default y
250	depends on SPARC64 && SMP && PREEMPTION
251
252config NUMA
253	bool "NUMA support"
254	depends on SPARC64 && SMP
255
256config NODES_SHIFT
257	int "Maximum NUMA Nodes (as a power of 2)"
258	range 4 5 if SPARC64
259	default "5"
260	depends on NUMA
261	help
262	  Specify the maximum number of NUMA Nodes available on the target
263	  system.  Increases memory reserved to accommodate various tables.
264
265config ARCH_SPARSEMEM_ENABLE
266	def_bool y if SPARC64
267	select SPARSEMEM_VMEMMAP_ENABLE
268
269config ARCH_SPARSEMEM_DEFAULT
270	def_bool y if SPARC64
271
272config ARCH_FORCE_MAX_ORDER
273	int "Maximum zone order"
274	default "13"
275	help
276	  The kernel memory allocator divides physically contiguous memory
277	  blocks into "zones", where each zone is a power of two number of
278	  pages.  This option selects the largest power of two that the kernel
279	  keeps in the memory allocator.  If you need to allocate very large
280	  blocks of physically contiguous memory, then you may need to
281	  increase this value.
282
283	  This config option is actually maximum order plus one. For example,
284	  a value of 13 means that the largest free memory block is 2^12 pages.
285
286if SPARC64 || COMPILE_TEST
287source "kernel/power/Kconfig"
288endif
289
290config SCHED_SMT
291	bool "SMT (Hyperthreading) scheduler support"
292	depends on SPARC64 && SMP
293	default y
294	help
295	  SMT scheduler support improves the CPU scheduler's decision making
296	  when dealing with SPARC cpus at a cost of slightly increased overhead
297	  in some places. If unsure say N here.
298
299config SCHED_MC
300	bool "Multi-core scheduler support"
301	depends on SPARC64 && SMP
302	default y
303	help
304	  Multi-core scheduler support improves the CPU scheduler's decision
305	  making when dealing with multi-core CPU chips at a cost of slightly
306	  increased overhead in some places. If unsure say N here.
307
308config CMDLINE_BOOL
309	bool "Default bootloader kernel arguments"
310	depends on SPARC64
311
312config CMDLINE
313	string "Initial kernel command string"
314	depends on CMDLINE_BOOL
315	default "console=ttyS0,9600 root=/dev/sda1"
316	help
317	  Say Y here if you want to be able to pass default arguments to
318	  the kernel. This will be overridden by the bootloader, if you
319	  use one (such as SILO). This is most useful if you want to boot
320	  a kernel from TFTP, and want default options to be available
321	  with having them passed on the command line.
322
323	  NOTE: This option WILL override the PROM bootargs setting!
324
325config SUN_PM
326	bool
327	default y if SPARC32
328	help
329	  Enable power management and CPU standby features on supported
330	  SPARC platforms.
331
332config SPARC_LED
333	tristate "Sun4m LED driver"
334	depends on SPARC32
335	help
336	  This driver toggles the front-panel LED on sun4m systems
337	  in a user-specifiable manner.  Its state can be probed
338	  by reading /proc/led and its blinking mode can be changed
339	  via writes to /proc/led
340
341config SERIAL_CONSOLE
342	bool
343	depends on SPARC32
344	default y
345	help
346	  If you say Y here, it will be possible to use a serial port as the
347	  system console (the system console is the device which receives all
348	  kernel messages and warnings and which allows logins in single user
349	  mode). This could be useful if some terminal or printer is connected
350	  to that serial port.
351
352	  Even if you say Y here, the currently visible virtual console
353	  (/dev/tty0) will still be used as the system console by default, but
354	  you can alter that using a kernel command line option such as
355	  "console=ttyS1". (Try "man bootparam" or see the documentation of
356	  your boot loader (silo) about how to pass options to the kernel at
357	  boot time.)
358
359	  If you don't have a graphics card installed and you say Y here, the
360	  kernel will automatically use the first serial line, /dev/ttyS0, as
361	  system console.
362
363	  If unsure, say N.
364
365config SPARC_LEON
366	bool "Sparc Leon processor family"
367	depends on SPARC32
368	select USB_EHCI_BIG_ENDIAN_MMIO
369	select USB_EHCI_BIG_ENDIAN_DESC
370	select USB_UHCI_BIG_ENDIAN_MMIO
371	select USB_UHCI_BIG_ENDIAN_DESC
372	help
373	  If you say Y here if you are running on a SPARC-LEON processor.
374	  The LEON processor is a synthesizable VHDL model of the
375	  SPARC-v8 standard. LEON is  part of the GRLIB collection of
376	  IP cores that are distributed under GPL. GRLIB can be downloaded
377	  from www.gaisler.com. You can download a sparc-linux cross-compilation
378	  toolchain at www.gaisler.com.
379
380if SPARC_LEON
381menu "U-Boot options"
382
383config UBOOT_LOAD_ADDR
384	hex "uImage Load Address"
385	default 0x40004000
386	help
387	 U-Boot kernel load address, the address in physical address space
388	 where u-boot will place the Linux kernel before booting it.
389	 This address is normally the base address of main memory + 0x4000.
390
391config UBOOT_FLASH_ADDR
392	hex "uImage.o Load Address"
393	default 0x00080000
394	help
395	 Optional setting only affecting the uImage.o ELF-image used to
396	 download the uImage file to the target using a ELF-loader other than
397	 U-Boot. It may for example be used to download an uImage to FLASH with
398	 the GRMON utility before even starting u-boot.
399
400config UBOOT_ENTRY_ADDR
401	hex "uImage Entry Address"
402	default 0xf0004000
403	help
404	 Do not change this unless you know what you're doing. This is
405	 hardcoded by the SPARC32 and LEON port.
406
407	 This is the virtual address u-boot jumps to when booting the Linux
408	 Kernel.
409
410endmenu
411endif
412
413endmenu
414
415menu "Bus options (PCI etc.)"
416config SBUS
417	bool
418	default y
419
420config SBUSCHAR
421	bool
422	default y
423
424config SUN_LDOMS
425	bool "Sun Logical Domains support"
426	depends on SPARC64
427	help
428	  Say Y here is you want to support virtual devices via
429	  Logical Domains.
430
431config PCIC_PCI
432	bool
433	depends on PCI && SPARC32 && !SPARC_LEON
434	default y
435
436config LEON_PCI
437	bool
438	depends on PCI && SPARC_LEON
439	default y
440
441config SPARC_GRPCI1
442	bool "GRPCI Host Bridge Support"
443	depends on LEON_PCI
444	default y
445	help
446	  Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
447	  PCI host controller is typically found in GRLIB SPARC32/LEON
448	  systems. The driver has one property (all_pci_errors) controlled
449	  from the bootloader that makes the GRPCI to generate interrupts
450	  on detected PCI Parity and System errors.
451
452config SPARC_GRPCI2
453	bool "GRPCI2 Host Bridge Support"
454	depends on LEON_PCI
455	default y
456	help
457	  Say Y here to include the GRPCI2 Host Bridge Driver.
458
459config SUN_OPENPROMFS
460	tristate "Openprom tree appears in /proc/openprom"
461	help
462	  If you say Y, the OpenPROM device tree will be available as a
463	  virtual file system, which you can mount to /proc/openprom by "mount
464	  -t openpromfs none /proc/openprom".
465
466	  To compile the /proc/openprom support as a module, choose M here: the
467	  module will be called openpromfs.
468
469	  Only choose N if you know in advance that you will not need to modify
470	  OpenPROM settings on the running system.
471
472# Makefile helpers
473config SPARC64_PCI
474	bool
475	default y
476	depends on SPARC64 && PCI
477
478config SPARC64_PCI_MSI
479	bool
480	default y
481	depends on SPARC64_PCI && PCI_MSI
482
483endmenu
484
485config COMPAT
486	bool
487	depends on SPARC64
488	default y
489	select HAVE_UID16
490	select ARCH_WANT_OLD_COMPAT_IPC
491	select COMPAT_OLD_SIGACTION
492
493source "drivers/sbus/char/Kconfig"
494