xref: /openbmc/linux/arch/sparc/Kconfig (revision be7f8012)
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 HAS_IOPORT
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 MODULES_USE_ELF_RELA
42	select PCI_SYSCALL if PCI
43	select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
44	select ODD_RT_SIGACTION
45	select OLD_SIGSUSPEND
46	select CPU_NO_EFFICIENT_FFS
47	select LOCKDEP_SMALL if LOCKDEP
48	select NEED_DMA_MAP_STATE
49	select NEED_SG_DMA_LENGTH
50	select TRACE_IRQFLAGS_SUPPORT
51
52config SPARC32
53	def_bool !64BIT
54	select ARCH_32BIT_OFF_T
55	select ARCH_HAS_SYNC_DMA_FOR_CPU
56	select CLZ_TAB
57	select DMA_DIRECT_REMAP
58	select GENERIC_ATOMIC64
59	select HAVE_UID16
60	select OLD_SIGACTION
61	select ZONE_DMA
62
63config SPARC64
64	def_bool 64BIT
65	select ALTERNATE_USER_ADDRESS_SPACE
66	select HAVE_FUNCTION_TRACER
67	select HAVE_FUNCTION_GRAPH_TRACER
68	select HAVE_KRETPROBES
69	select HAVE_KPROBES
70	select MMU_GATHER_RCU_TABLE_FREE if SMP
71	select MMU_GATHER_MERGE_VMAS
72	select MMU_GATHER_NO_FLUSH_CACHE
73	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
74	select HAVE_DYNAMIC_FTRACE
75	select HAVE_FTRACE_MCOUNT_RECORD
76	select HAVE_SYSCALL_TRACEPOINTS
77	select HAVE_CONTEXT_TRACKING_USER
78	select HAVE_TIF_NOHZ
79	select HAVE_DEBUG_KMEMLEAK
80	select IOMMU_HELPER
81	select SPARSE_IRQ
82	select RTC_DRV_CMOS
83	select RTC_DRV_BQ4802
84	select RTC_DRV_SUN4V
85	select RTC_DRV_STARFIRE
86	select HAVE_PERF_EVENTS
87	select PERF_USE_VMALLOC
88	select ARCH_HAVE_NMI_SAFE_CMPXCHG
89	select HAVE_C_RECORDMCOUNT
90	select HAVE_ARCH_AUDITSYSCALL
91	select ARCH_SUPPORTS_ATOMIC_RMW
92	select ARCH_SUPPORTS_DEBUG_PAGEALLOC
93	select HAVE_NMI
94	select HAVE_REGS_AND_STACK_ACCESS_API
95	select ARCH_USE_QUEUED_RWLOCKS
96	select ARCH_USE_QUEUED_SPINLOCKS
97	select GENERIC_TIME_VSYSCALL
98	select ARCH_CLOCKSOURCE_DATA
99	select ARCH_HAS_PTE_SPECIAL
100	select PCI_DOMAINS if PCI
101	select ARCH_HAS_GIGANTIC_PAGE
102	select HAVE_SOFTIRQ_ON_OWN_STACK
103	select HAVE_SETUP_PER_CPU_AREA
104	select NEED_PER_CPU_EMBED_FIRST_CHUNK
105	select NEED_PER_CPU_PAGE_FIRST_CHUNK
106
107config ARCH_PROC_KCORE_TEXT
108	def_bool y
109
110config CPU_BIG_ENDIAN
111	def_bool y
112
113config ARCH_ATU
114	bool
115	default y if SPARC64
116
117config STACKTRACE_SUPPORT
118	bool
119	default y if SPARC64
120
121config LOCKDEP_SUPPORT
122	bool
123	default y if SPARC64
124
125config ARCH_HIBERNATION_POSSIBLE
126	def_bool y if SPARC64
127
128config AUDIT_ARCH
129	bool
130	default y
131
132config MMU
133	bool
134	default y
135
136config HIGHMEM
137	bool
138	default y if SPARC32
139	select KMAP_LOCAL
140
141config GENERIC_ISA_DMA
142	bool
143	default y if SPARC32
144
145config PGTABLE_LEVELS
146	default 4 if 64BIT
147	default 3
148
149config ARCH_SUPPORTS_UPROBES
150	def_bool y if SPARC64
151
152menu "Processor type and features"
153
154config SMP
155	bool "Symmetric multi-processing support"
156	help
157	  This enables support for systems with more than one CPU. If you have
158	  a system with only one CPU, say N. If you have a system with more
159	  than one CPU, say Y.
160
161	  If you say N here, the kernel will run on uni- and multiprocessor
162	  machines, but will use only one CPU of a multiprocessor machine. If
163	  you say Y here, the kernel will run on many, but not all,
164	  uniprocessor machines. On a uniprocessor machine, the kernel
165	  will run faster if you say N here.
166
167	  People using multiprocessor machines who say Y here should also say
168	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
169	  Management" code will be disabled if you say Y here.
170
171	  See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
172	  available at <https://www.tldp.org/docs.html#howto>.
173
174	  If you don't know what to do here, say N.
175
176config NR_CPUS
177	int "Maximum number of CPUs"
178	depends on SMP
179	range 2 32 if SPARC32
180	range 2 4096 if SPARC64
181	default 32 if SPARC32
182	default 4096 if SPARC64
183
184source "kernel/Kconfig.hz"
185
186config GENERIC_HWEIGHT
187	bool
188	default y
189
190config GENERIC_CALIBRATE_DELAY
191	bool
192	default y
193
194config ARCH_MAY_HAVE_PC_FDC
195	bool
196	default y
197
198config EMULATED_CMPXCHG
199	bool
200	default y if SPARC32
201	help
202	  Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
203	  is emulated, and therefore it is not completely atomic.
204
205# Makefile helpers
206config SPARC32_SMP
207	bool
208	default y
209	depends on SPARC32 && SMP
210
211config SPARC64_SMP
212	bool
213	default y
214	depends on SPARC64 && SMP
215
216config EARLYFB
217	bool "Support for early boot text console"
218	default y
219	depends on SPARC64
220	help
221	  Say Y here to enable a faster early framebuffer boot console.
222
223config HOTPLUG_CPU
224	bool "Support for hot-pluggable CPUs"
225	depends on SPARC64 && SMP
226	help
227	  Say Y here to experiment with turning CPUs off and on.  CPUs
228	  can be controlled through /sys/devices/system/cpu/cpu#.
229	  Say N if you want to disable CPU hotplug.
230
231if SPARC64
232source "drivers/cpufreq/Kconfig"
233endif
234
235config US3_MC
236	tristate "UltraSPARC-III Memory Controller driver"
237	depends on SPARC64
238	default y
239	help
240	  This adds a driver for the UltraSPARC-III memory controller.
241	  Loading this driver allows exact mnemonic strings to be
242	  printed in the event of a memory error, so that the faulty DIMM
243	  on the motherboard can be matched to the error.
244
245	  If in doubt, say Y, as this information can be very useful.
246
247# Global things across all Sun machines.
248config GENERIC_LOCKBREAK
249	bool
250	default y
251	depends on SPARC64 && SMP && PREEMPTION
252
253config NUMA
254	bool "NUMA support"
255	depends on SPARC64 && SMP
256
257config NODES_SHIFT
258	int "Maximum NUMA Nodes (as a power of 2)"
259	range 4 5 if SPARC64
260	default "5"
261	depends on NUMA
262	help
263	  Specify the maximum number of NUMA Nodes available on the target
264	  system.  Increases memory reserved to accommodate various tables.
265
266config ARCH_SPARSEMEM_ENABLE
267	def_bool y if SPARC64
268	select SPARSEMEM_VMEMMAP_ENABLE
269
270config ARCH_SPARSEMEM_DEFAULT
271	def_bool y if SPARC64
272
273config ARCH_FORCE_MAX_ORDER
274	int "Order of maximal physically contiguous allocations"
275	default "12"
276	help
277	  The kernel page allocator limits the size of maximal physically
278	  contiguous allocations. The limit is called MAX_ORDER and it
279	  defines the maximal power of two of number of pages that can be
280	  allocated as a single contiguous block. This option allows
281	  overriding the default setting when ability to allocate very
282	  large blocks of physically contiguous memory is required.
283
284	  Don't change if unsure.
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