xref: /openbmc/linux/arch/sparc/Kconfig (revision 151f4e2b)
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 ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
16	select ARCH_MIGHT_HAVE_PC_SERIO
17	select OF
18	select OF_PROMTREE
19	select HAVE_IDE
20	select HAVE_OPROFILE
21	select HAVE_ARCH_KGDB if !SMP || SPARC64
22	select HAVE_ARCH_TRACEHOOK
23	select HAVE_EXIT_THREAD
24	select HAVE_PCI
25	select SYSCTL_EXCEPTION_TRACE
26	select RTC_CLASS
27	select RTC_DRV_M48T59
28	select RTC_SYSTOHC
29	select HAVE_ARCH_JUMP_LABEL if SPARC64
30	select GENERIC_IRQ_SHOW
31	select ARCH_WANT_IPC_PARSE_VERSION
32	select GENERIC_PCI_IOMAP
33	select HAVE_NMI_WATCHDOG if SPARC64
34	select HAVE_CBPF_JIT if SPARC32
35	select HAVE_EBPF_JIT if SPARC64
36	select HAVE_DEBUG_BUGVERBOSE
37	select GENERIC_SMP_IDLE_THREAD
38	select GENERIC_CLOCKEVENTS
39	select GENERIC_STRNCPY_FROM_USER
40	select GENERIC_STRNLEN_USER
41	select MODULES_USE_ELF_RELA
42	select PCI_SYSCALL if PCI
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
50config SPARC32
51	def_bool !64BIT
52	select ARCH_32BIT_OFF_T
53	select ARCH_HAS_SYNC_DMA_FOR_CPU
54	select GENERIC_ATOMIC64
55	select CLZ_TAB
56	select HAVE_UID16
57	select OLD_SIGACTION
58
59config SPARC64
60	def_bool 64BIT
61	select HAVE_FUNCTION_TRACER
62	select HAVE_FUNCTION_GRAPH_TRACER
63	select HAVE_KRETPROBES
64	select HAVE_KPROBES
65	select HAVE_RCU_TABLE_FREE if SMP
66	select HAVE_RCU_TABLE_NO_INVALIDATE if HAVE_RCU_TABLE_FREE
67	select HAVE_MEMBLOCK_NODE_MAP
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
73	select HAVE_DEBUG_KMEMLEAK
74	select IOMMU_HELPER
75	select SPARSE_IRQ
76	select RTC_DRV_CMOS
77	select RTC_DRV_BQ4802
78	select RTC_DRV_SUN4V
79	select RTC_DRV_STARFIRE
80	select HAVE_PERF_EVENTS
81	select PERF_USE_VMALLOC
82	select IRQ_PREFLOW_FASTEOI
83	select ARCH_HAVE_NMI_SAFE_CMPXCHG
84	select HAVE_C_RECORDMCOUNT
85	select HAVE_ARCH_AUDITSYSCALL
86	select ARCH_SUPPORTS_ATOMIC_RMW
87	select HAVE_NMI
88	select HAVE_REGS_AND_STACK_ACCESS_API
89	select ARCH_USE_QUEUED_RWLOCKS
90	select ARCH_USE_QUEUED_SPINLOCKS
91	select GENERIC_TIME_VSYSCALL
92	select ARCH_CLOCKSOURCE_DATA
93	select ARCH_HAS_PTE_SPECIAL
94	select PCI_DOMAINS if PCI
95	select ARCH_HAS_GIGANTIC_PAGE
96
97config ARCH_DEFCONFIG
98	string
99	default "arch/sparc/configs/sparc32_defconfig" if SPARC32
100	default "arch/sparc/configs/sparc64_defconfig" if SPARC64
101
102config ARCH_PROC_KCORE_TEXT
103	def_bool y
104
105config CPU_BIG_ENDIAN
106	def_bool y
107
108config ARCH_ATU
109	bool
110	default y if SPARC64
111
112config STACKTRACE_SUPPORT
113	bool
114	default y if SPARC64
115
116config LOCKDEP_SUPPORT
117	bool
118	default y if SPARC64
119
120config ARCH_HIBERNATION_POSSIBLE
121	def_bool y if SPARC64
122
123config AUDIT_ARCH
124	bool
125	default y
126
127config HAVE_SETUP_PER_CPU_AREA
128	def_bool y if SPARC64
129
130config NEED_PER_CPU_EMBED_FIRST_CHUNK
131	def_bool y if SPARC64
132
133config NEED_PER_CPU_PAGE_FIRST_CHUNK
134	def_bool y if SPARC64
135
136config MMU
137	bool
138	default y
139
140config HIGHMEM
141	bool
142	default y if SPARC32
143
144config ZONE_DMA
145	bool
146	default y if SPARC32
147
148config GENERIC_ISA_DMA
149	bool
150	default y if SPARC32
151
152config ARCH_SUPPORTS_DEBUG_PAGEALLOC
153	def_bool y if SPARC64
154
155config PGTABLE_LEVELS
156	default 4 if 64BIT
157	default 3
158
159config ARCH_SUPPORTS_UPROBES
160	def_bool y if SPARC64
161
162menu "Processor type and features"
163
164config SMP
165	bool "Symmetric multi-processing support"
166	---help---
167	  This enables support for systems with more than one CPU. If you have
168	  a system with only one CPU, say N. If you have a system with more
169	  than one CPU, say Y.
170
171	  If you say N here, the kernel will run on uni- and multiprocessor
172	  machines, but will use only one CPU of a multiprocessor machine. If
173	  you say Y here, the kernel will run on many, but not all,
174	  uniprocessor machines. On a uniprocessor machine, the kernel
175	  will run faster if you say N here.
176
177	  People using multiprocessor machines who say Y here should also say
178	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
179	  Management" code will be disabled if you say Y here.
180
181	  See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO
182	  available at <http://www.tldp.org/docs.html#howto>.
183
184	  If you don't know what to do here, say N.
185
186config NR_CPUS
187	int "Maximum number of CPUs"
188	depends on SMP
189	range 2 32 if SPARC32
190	range 2 4096 if SPARC64
191	default 32 if SPARC32
192	default 4096 if SPARC64
193
194source "kernel/Kconfig.hz"
195
196config GENERIC_HWEIGHT
197	bool
198	default y
199
200config GENERIC_CALIBRATE_DELAY
201	bool
202	default y
203
204config ARCH_MAY_HAVE_PC_FDC
205	bool
206	default y
207
208config EMULATED_CMPXCHG
209	bool
210	default y if SPARC32
211	help
212	  Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
213	  is emulated, and therefore it is not completely atomic.
214
215# Makefile helpers
216config SPARC32_SMP
217	bool
218	default y
219	depends on SPARC32 && SMP
220
221config SPARC64_SMP
222	bool
223	default y
224	depends on SPARC64 && SMP
225
226config EARLYFB
227	bool "Support for early boot text console"
228	default y
229	depends on SPARC64
230	help
231	  Say Y here to enable a faster early framebuffer boot console.
232
233config SECCOMP
234	bool "Enable seccomp to safely compute untrusted bytecode"
235	depends on SPARC64 && PROC_FS
236	default y
237	help
238	  This kernel feature is useful for number crunching applications
239	  that may need to compute untrusted bytecode during their
240	  execution. By using pipes or other transports made available to
241	  the process as file descriptors supporting the read/write
242	  syscalls, it's possible to isolate those applications in
243	  their own address space using seccomp. Once seccomp is
244	  enabled via /proc/<pid>/seccomp, it cannot be disabled
245	  and the task is only allowed to execute a few safe syscalls
246	  defined by each seccomp mode.
247
248	  If unsure, say Y. Only embedded should say N here.
249
250config HOTPLUG_CPU
251	bool "Support for hot-pluggable CPUs"
252	depends on SPARC64 && SMP
253	help
254	  Say Y here to experiment with turning CPUs off and on.  CPUs
255	  can be controlled through /sys/devices/system/cpu/cpu#.
256	  Say N if you want to disable CPU hotplug.
257
258if SPARC64
259source "drivers/cpufreq/Kconfig"
260endif
261
262config US3_MC
263	tristate "UltraSPARC-III Memory Controller driver"
264	depends on SPARC64
265	default y
266	help
267	  This adds a driver for the UltraSPARC-III memory controller.
268	  Loading this driver allows exact mnemonic strings to be
269	  printed in the event of a memory error, so that the faulty DIMM
270	  on the motherboard can be matched to the error.
271
272	  If in doubt, say Y, as this information can be very useful.
273
274# Global things across all Sun machines.
275config GENERIC_LOCKBREAK
276	bool
277	default y
278	depends on SPARC64 && SMP && PREEMPT
279
280config NUMA
281	bool "NUMA support"
282	depends on SPARC64 && SMP
283
284config NODES_SHIFT
285	int "Maximum NUMA Nodes (as a power of 2)"
286	range 4 5 if SPARC64
287	default "5"
288	depends on NEED_MULTIPLE_NODES
289	help
290	  Specify the maximum number of NUMA Nodes available on the target
291	  system.  Increases memory reserved to accommodate various tables.
292
293# Some NUMA nodes have memory ranges that span
294# other nodes.  Even though a pfn is valid and
295# between a node's start and end pfns, it may not
296# reside on that node.  See memmap_init_zone()
297# for details.
298config NODES_SPAN_OTHER_NODES
299	def_bool y
300	depends on NEED_MULTIPLE_NODES
301
302config ARCH_SELECT_MEMORY_MODEL
303	def_bool y if SPARC64
304
305config ARCH_SPARSEMEM_ENABLE
306	def_bool y if SPARC64
307	select SPARSEMEM_VMEMMAP_ENABLE
308
309config ARCH_SPARSEMEM_DEFAULT
310	def_bool y if SPARC64
311
312config FORCE_MAX_ZONEORDER
313	int "Maximum zone order"
314	default "13"
315	help
316	  The kernel memory allocator divides physically contiguous memory
317	  blocks into "zones", where each zone is a power of two number of
318	  pages.  This option selects the largest power of two that the kernel
319	  keeps in the memory allocator.  If you need to allocate very large
320	  blocks of physically contiguous memory, then you may need to
321	  increase this value.
322
323	  This config option is actually maximum order plus one. For example,
324	  a value of 13 means that the largest free memory block is 2^12 pages.
325
326if SPARC64
327source "kernel/power/Kconfig"
328endif
329
330config SCHED_SMT
331	bool "SMT (Hyperthreading) scheduler support"
332	depends on SPARC64 && SMP
333	default y
334	help
335	  SMT scheduler support improves the CPU scheduler's decision making
336	  when dealing with SPARC cpus at a cost of slightly increased overhead
337	  in some places. If unsure say N here.
338
339config SCHED_MC
340	bool "Multi-core scheduler support"
341	depends on SPARC64 && SMP
342	default y
343	help
344	  Multi-core scheduler support improves the CPU scheduler's decision
345	  making when dealing with multi-core CPU chips at a cost of slightly
346	  increased overhead in some places. If unsure say N here.
347
348config CMDLINE_BOOL
349	bool "Default bootloader kernel arguments"
350	depends on SPARC64
351
352config CMDLINE
353	string "Initial kernel command string"
354	depends on CMDLINE_BOOL
355	default "console=ttyS0,9600 root=/dev/sda1"
356	help
357	  Say Y here if you want to be able to pass default arguments to
358	  the kernel. This will be overridden by the bootloader, if you
359	  use one (such as SILO). This is most useful if you want to boot
360	  a kernel from TFTP, and want default options to be available
361	  with having them passed on the command line.
362
363	  NOTE: This option WILL override the PROM bootargs setting!
364
365config SUN_PM
366	bool
367	default y if SPARC32
368	help
369	  Enable power management and CPU standby features on supported
370	  SPARC platforms.
371
372config SPARC_LED
373	tristate "Sun4m LED driver"
374	depends on SPARC32
375	help
376	  This driver toggles the front-panel LED on sun4m systems
377	  in a user-specifiable manner.  Its state can be probed
378	  by reading /proc/led and its blinking mode can be changed
379	  via writes to /proc/led
380
381config SERIAL_CONSOLE
382	bool
383	depends on SPARC32
384	default y
385	---help---
386	  If you say Y here, it will be possible to use a serial port as the
387	  system console (the system console is the device which receives all
388	  kernel messages and warnings and which allows logins in single user
389	  mode). This could be useful if some terminal or printer is connected
390	  to that serial port.
391
392	  Even if you say Y here, the currently visible virtual console
393	  (/dev/tty0) will still be used as the system console by default, but
394	  you can alter that using a kernel command line option such as
395	  "console=ttyS1". (Try "man bootparam" or see the documentation of
396	  your boot loader (silo) about how to pass options to the kernel at
397	  boot time.)
398
399	  If you don't have a graphics card installed and you say Y here, the
400	  kernel will automatically use the first serial line, /dev/ttyS0, as
401	  system console.
402
403	  If unsure, say N.
404
405config SPARC_LEON
406	bool "Sparc Leon processor family"
407	depends on SPARC32
408	select USB_EHCI_BIG_ENDIAN_MMIO
409	select USB_EHCI_BIG_ENDIAN_DESC
410	select USB_UHCI_BIG_ENDIAN_MMIO
411	select USB_UHCI_BIG_ENDIAN_DESC
412	---help---
413	  If you say Y here if you are running on a SPARC-LEON processor.
414	  The LEON processor is a synthesizable VHDL model of the
415	  SPARC-v8 standard. LEON is  part of the GRLIB collection of
416	  IP cores that are distributed under GPL. GRLIB can be downloaded
417	  from www.gaisler.com. You can download a sparc-linux cross-compilation
418	  toolchain at www.gaisler.com.
419
420if SPARC_LEON
421menu "U-Boot options"
422
423config UBOOT_LOAD_ADDR
424	hex "uImage Load Address"
425	default 0x40004000
426	---help---
427	 U-Boot kernel load address, the address in physical address space
428	 where u-boot will place the Linux kernel before booting it.
429	 This address is normally the base address of main memory + 0x4000.
430
431config UBOOT_FLASH_ADDR
432	hex "uImage.o Load Address"
433	default 0x00080000
434	---help---
435	 Optional setting only affecting the uImage.o ELF-image used to
436	 download the uImage file to the target using a ELF-loader other than
437	 U-Boot. It may for example be used to download an uImage to FLASH with
438	 the GRMON utility before even starting u-boot.
439
440config UBOOT_ENTRY_ADDR
441	hex "uImage Entry Address"
442	default 0xf0004000
443	---help---
444	 Do not change this unless you know what you're doing. This is
445	 hardcoded by the SPARC32 and LEON port.
446
447	 This is the virtual address u-boot jumps to when booting the Linux
448	 Kernel.
449
450endmenu
451endif
452
453endmenu
454
455menu "Bus options (PCI etc.)"
456config SBUS
457	bool
458	default y
459
460config SBUSCHAR
461	bool
462	default y
463
464config SUN_LDOMS
465	bool "Sun Logical Domains support"
466	depends on SPARC64
467	help
468	  Say Y here is you want to support virtual devices via
469	  Logical Domains.
470
471config PCIC_PCI
472	bool
473	depends on PCI && SPARC32 && !SPARC_LEON
474	default y
475
476config LEON_PCI
477	bool
478	depends on PCI && SPARC_LEON
479	default y
480
481config SPARC_GRPCI1
482	bool "GRPCI Host Bridge Support"
483	depends on LEON_PCI
484	default y
485	help
486	  Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
487	  PCI host controller is typically found in GRLIB SPARC32/LEON
488	  systems. The driver has one property (all_pci_errors) controlled
489	  from the bootloader that makes the GRPCI to generate interrupts
490	  on detected PCI Parity and System errors.
491
492config SPARC_GRPCI2
493	bool "GRPCI2 Host Bridge Support"
494	depends on LEON_PCI
495	default y
496	help
497	  Say Y here to include the GRPCI2 Host Bridge Driver.
498
499config SUN_OPENPROMFS
500	tristate "Openprom tree appears in /proc/openprom"
501	help
502	  If you say Y, the OpenPROM device tree will be available as a
503	  virtual file system, which you can mount to /proc/openprom by "mount
504	  -t openpromfs none /proc/openprom".
505
506	  To compile the /proc/openprom support as a module, choose M here: the
507	  module will be called openpromfs.
508
509	  Only choose N if you know in advance that you will not need to modify
510	  OpenPROM settings on the running system.
511
512# Makefile helpers
513config SPARC64_PCI
514	bool
515	default y
516	depends on SPARC64 && PCI
517
518config SPARC64_PCI_MSI
519	bool
520	default y
521	depends on SPARC64_PCI && PCI_MSI
522
523endmenu
524
525config COMPAT
526	bool
527	depends on SPARC64
528	default y
529	select COMPAT_BINFMT_ELF
530	select HAVE_UID16
531	select ARCH_WANT_OLD_COMPAT_IPC
532	select COMPAT_OLD_SIGACTION
533
534config SYSVIPC_COMPAT
535	bool
536	depends on COMPAT && SYSVIPC
537	default y
538
539source "drivers/sbus/char/Kconfig"
540