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Linux/arch/sparc/Kconfig

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  1 # SPDX-License-Identifier: GPL-2.0-only
  2 config 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 
 13 config 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_IDE
 23         select HAVE_ARCH_KGDB if !SMP || SPARC64
 24         select HAVE_ARCH_TRACEHOOK
 25         select HAVE_ARCH_SECCOMP if SPARC64
 26         select HAVE_EXIT_THREAD
 27         select HAVE_PCI
 28         select SYSCTL_EXCEPTION_TRACE
 29         select RTC_CLASS
 30         select RTC_DRV_M48T59
 31         select RTC_SYSTOHC
 32         select HAVE_ARCH_JUMP_LABEL if SPARC64
 33         select GENERIC_IRQ_SHOW
 34         select ARCH_WANT_IPC_PARSE_VERSION
 35         select GENERIC_PCI_IOMAP
 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 GENERIC_STRNCPY_FROM_USER
 42         select GENERIC_STRNLEN_USER
 43         select MODULES_USE_ELF_RELA
 44         select PCI_SYSCALL if PCI
 45         select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
 46         select ODD_RT_SIGACTION
 47         select OLD_SIGSUSPEND
 48         select CPU_NO_EFFICIENT_FFS
 49         select LOCKDEP_SMALL if LOCKDEP
 50         select NEED_DMA_MAP_STATE
 51         select NEED_SG_DMA_LENGTH
 52         select SET_FS
 53 
 54 config SPARC32
 55         def_bool !64BIT
 56         select ARCH_32BIT_OFF_T
 57         select ARCH_HAS_SYNC_DMA_FOR_CPU
 58         select GENERIC_ATOMIC64
 59         select CLZ_TAB
 60         select HAVE_UID16
 61         select OLD_SIGACTION
 62 
 63 config 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 
101 config ARCH_PROC_KCORE_TEXT
102         def_bool y
103 
104 config CPU_BIG_ENDIAN
105         def_bool y
106 
107 config ARCH_ATU
108         bool
109         default y if SPARC64
110 
111 config STACKTRACE_SUPPORT
112         bool
113         default y if SPARC64
114 
115 config LOCKDEP_SUPPORT
116         bool
117         default y if SPARC64
118 
119 config ARCH_HIBERNATION_POSSIBLE
120         def_bool y if SPARC64
121 
122 config AUDIT_ARCH
123         bool
124         default y
125 
126 config HAVE_SETUP_PER_CPU_AREA
127         def_bool y if SPARC64
128 
129 config NEED_PER_CPU_EMBED_FIRST_CHUNK
130         def_bool y if SPARC64
131 
132 config NEED_PER_CPU_PAGE_FIRST_CHUNK
133         def_bool y if SPARC64
134 
135 config MMU
136         bool
137         default y
138 
139 config HIGHMEM
140         bool
141         default y if SPARC32
142         select KMAP_LOCAL
143 
144 config ZONE_DMA
145         bool
146         default y if SPARC32
147 
148 config GENERIC_ISA_DMA
149         bool
150         default y if SPARC32
151 
152 config PGTABLE_LEVELS
153         default 4 if 64BIT
154         default 3
155 
156 config ARCH_SUPPORTS_UPROBES
157         def_bool y if SPARC64
158 
159 menu "Processor type and features"
160 
161 config SMP
162         bool "Symmetric multi-processing support"
163         help
164           This enables support for systems with more than one CPU. If you have
165           a system with only one CPU, say N. If you have a system with more
166           than one CPU, say Y.
167 
168           If you say N here, the kernel will run on uni- and multiprocessor
169           machines, but will use only one CPU of a multiprocessor machine. If
170           you say Y here, the kernel will run on many, but not all,
171           uniprocessor machines. On a uniprocessor machine, the kernel
172           will run faster if you say N here.
173 
174           People using multiprocessor machines who say Y here should also say
175           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
176           Management" code will be disabled if you say Y here.
177 
178           See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
179           available at <https://www.tldp.org/docs.html#howto>.
180 
181           If you don't know what to do here, say N.
182 
183 config NR_CPUS
184         int "Maximum number of CPUs"
185         depends on SMP
186         range 2 32 if SPARC32
187         range 2 4096 if SPARC64
188         default 32 if SPARC32
189         default 4096 if SPARC64
190 
191 source "kernel/Kconfig.hz"
192 
193 config GENERIC_HWEIGHT
194         bool
195         default y
196 
197 config GENERIC_CALIBRATE_DELAY
198         bool
199         default y
200 
201 config ARCH_MAY_HAVE_PC_FDC
202         bool
203         default y
204 
205 config EMULATED_CMPXCHG
206         bool
207         default y if SPARC32
208         help
209           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
210           is emulated, and therefore it is not completely atomic.
211 
212 # Makefile helpers
213 config SPARC32_SMP
214         bool
215         default y
216         depends on SPARC32 && SMP
217 
218 config SPARC64_SMP
219         bool
220         default y
221         depends on SPARC64 && SMP
222 
223 config EARLYFB
224         bool "Support for early boot text console"
225         default y
226         depends on SPARC64
227         help
228           Say Y here to enable a faster early framebuffer boot console.
229 
230 config HOTPLUG_CPU
231         bool "Support for hot-pluggable CPUs"
232         depends on SPARC64 && SMP
233         help
234           Say Y here to experiment with turning CPUs off and on.  CPUs
235           can be controlled through /sys/devices/system/cpu/cpu#.
236           Say N if you want to disable CPU hotplug.
237 
238 if SPARC64
239 source "drivers/cpufreq/Kconfig"
240 endif
241 
242 config US3_MC
243         tristate "UltraSPARC-III Memory Controller driver"
244         depends on SPARC64
245         default y
246         help
247           This adds a driver for the UltraSPARC-III memory controller.
248           Loading this driver allows exact mnemonic strings to be
249           printed in the event of a memory error, so that the faulty DIMM
250           on the motherboard can be matched to the error.
251 
252           If in doubt, say Y, as this information can be very useful.
253 
254 # Global things across all Sun machines.
255 config GENERIC_LOCKBREAK
256         bool
257         default y
258         depends on SPARC64 && SMP && PREEMPTION
259 
260 config NUMA
261         bool "NUMA support"
262         depends on SPARC64 && SMP
263 
264 config NODES_SHIFT
265         int "Maximum NUMA Nodes (as a power of 2)"
266         range 4 5 if SPARC64
267         default "5"
268         depends on NEED_MULTIPLE_NODES
269         help
270           Specify the maximum number of NUMA Nodes available on the target
271           system.  Increases memory reserved to accommodate various tables.
272 
273 config ARCH_SPARSEMEM_ENABLE
274         def_bool y if SPARC64
275         select SPARSEMEM_VMEMMAP_ENABLE
276 
277 config ARCH_SPARSEMEM_DEFAULT
278         def_bool y if SPARC64
279 
280 config FORCE_MAX_ZONEORDER
281         int "Maximum zone order"
282         default "13"
283         help
284           The kernel memory allocator divides physically contiguous memory
285           blocks into "zones", where each zone is a power of two number of
286           pages.  This option selects the largest power of two that the kernel
287           keeps in the memory allocator.  If you need to allocate very large
288           blocks of physically contiguous memory, then you may need to
289           increase this value.
290 
291           This config option is actually maximum order plus one. For example,
292           a value of 13 means that the largest free memory block is 2^12 pages.
293 
294 if SPARC64
295 source "kernel/power/Kconfig"
296 endif
297 
298 config SCHED_SMT
299         bool "SMT (Hyperthreading) scheduler support"
300         depends on SPARC64 && SMP
301         default y
302         help
303           SMT scheduler support improves the CPU scheduler's decision making
304           when dealing with SPARC cpus at a cost of slightly increased overhead
305           in some places. If unsure say N here.
306 
307 config SCHED_MC
308         bool "Multi-core scheduler support"
309         depends on SPARC64 && SMP
310         default y
311         help
312           Multi-core scheduler support improves the CPU scheduler's decision
313           making when dealing with multi-core CPU chips at a cost of slightly
314           increased overhead in some places. If unsure say N here.
315 
316 config CMDLINE_BOOL
317         bool "Default bootloader kernel arguments"
318         depends on SPARC64
319 
320 config CMDLINE
321         string "Initial kernel command string"
322         depends on CMDLINE_BOOL
323         default "console=ttyS0,9600 root=/dev/sda1"
324         help
325           Say Y here if you want to be able to pass default arguments to
326           the kernel. This will be overridden by the bootloader, if you
327           use one (such as SILO). This is most useful if you want to boot
328           a kernel from TFTP, and want default options to be available
329           with having them passed on the command line.
330 
331           NOTE: This option WILL override the PROM bootargs setting!
332 
333 config SUN_PM
334         bool
335         default y if SPARC32
336         help
337           Enable power management and CPU standby features on supported
338           SPARC platforms.
339 
340 config SPARC_LED
341         tristate "Sun4m LED driver"
342         depends on SPARC32
343         help
344           This driver toggles the front-panel LED on sun4m systems
345           in a user-specifiable manner.  Its state can be probed
346           by reading /proc/led and its blinking mode can be changed
347           via writes to /proc/led
348 
349 config SERIAL_CONSOLE
350         bool
351         depends on SPARC32
352         default y
353         help
354           If you say Y here, it will be possible to use a serial port as the
355           system console (the system console is the device which receives all
356           kernel messages and warnings and which allows logins in single user
357           mode). This could be useful if some terminal or printer is connected
358           to that serial port.
359 
360           Even if you say Y here, the currently visible virtual console
361           (/dev/tty0) will still be used as the system console by default, but
362           you can alter that using a kernel command line option such as
363           "console=ttyS1". (Try "man bootparam" or see the documentation of
364           your boot loader (silo) about how to pass options to the kernel at
365           boot time.)
366 
367           If you don't have a graphics card installed and you say Y here, the
368           kernel will automatically use the first serial line, /dev/ttyS0, as
369           system console.
370 
371           If unsure, say N.
372 
373 config SPARC_LEON
374         bool "Sparc Leon processor family"
375         depends on SPARC32
376         select USB_EHCI_BIG_ENDIAN_MMIO
377         select USB_EHCI_BIG_ENDIAN_DESC
378         select USB_UHCI_BIG_ENDIAN_MMIO
379         select USB_UHCI_BIG_ENDIAN_DESC
380         help
381           If you say Y here if you are running on a SPARC-LEON processor.
382           The LEON processor is a synthesizable VHDL model of the
383           SPARC-v8 standard. LEON is  part of the GRLIB collection of
384           IP cores that are distributed under GPL. GRLIB can be downloaded
385           from www.gaisler.com. You can download a sparc-linux cross-compilation
386           toolchain at www.gaisler.com.
387 
388 if SPARC_LEON
389 menu "U-Boot options"
390 
391 config UBOOT_LOAD_ADDR
392         hex "uImage Load Address"
393         default 0x40004000
394         help
395          U-Boot kernel load address, the address in physical address space
396          where u-boot will place the Linux kernel before booting it.
397          This address is normally the base address of main memory + 0x4000.
398 
399 config UBOOT_FLASH_ADDR
400         hex "uImage.o Load Address"
401         default 0x00080000
402         help
403          Optional setting only affecting the uImage.o ELF-image used to
404          download the uImage file to the target using a ELF-loader other than
405          U-Boot. It may for example be used to download an uImage to FLASH with
406          the GRMON utility before even starting u-boot.
407 
408 config UBOOT_ENTRY_ADDR
409         hex "uImage Entry Address"
410         default 0xf0004000
411         help
412          Do not change this unless you know what you're doing. This is
413          hardcoded by the SPARC32 and LEON port.
414 
415          This is the virtual address u-boot jumps to when booting the Linux
416          Kernel.
417 
418 endmenu
419 endif
420 
421 endmenu
422 
423 menu "Bus options (PCI etc.)"
424 config SBUS
425         bool
426         default y
427 
428 config SBUSCHAR
429         bool
430         default y
431 
432 config SUN_LDOMS
433         bool "Sun Logical Domains support"
434         depends on SPARC64
435         help
436           Say Y here is you want to support virtual devices via
437           Logical Domains.
438 
439 config PCIC_PCI
440         bool
441         depends on PCI && SPARC32 && !SPARC_LEON
442         default y
443 
444 config LEON_PCI
445         bool
446         depends on PCI && SPARC_LEON
447         default y
448 
449 config SPARC_GRPCI1
450         bool "GRPCI Host Bridge Support"
451         depends on LEON_PCI
452         default y
453         help
454           Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
455           PCI host controller is typically found in GRLIB SPARC32/LEON
456           systems. The driver has one property (all_pci_errors) controlled
457           from the bootloader that makes the GRPCI to generate interrupts
458           on detected PCI Parity and System errors.
459 
460 config SPARC_GRPCI2
461         bool "GRPCI2 Host Bridge Support"
462         depends on LEON_PCI
463         default y
464         help
465           Say Y here to include the GRPCI2 Host Bridge Driver.
466 
467 config SUN_OPENPROMFS
468         tristate "Openprom tree appears in /proc/openprom"
469         help
470           If you say Y, the OpenPROM device tree will be available as a
471           virtual file system, which you can mount to /proc/openprom by "mount
472           -t openpromfs none /proc/openprom".
473 
474           To compile the /proc/openprom support as a module, choose M here: the
475           module will be called openpromfs.
476 
477           Only choose N if you know in advance that you will not need to modify
478           OpenPROM settings on the running system.
479 
480 # Makefile helpers
481 config SPARC64_PCI
482         bool
483         default y
484         depends on SPARC64 && PCI
485 
486 config SPARC64_PCI_MSI
487         bool
488         default y
489         depends on SPARC64_PCI && PCI_MSI
490 
491 endmenu
492 
493 config COMPAT
494         bool
495         depends on SPARC64
496         default y
497         select HAVE_UID16
498         select ARCH_WANT_OLD_COMPAT_IPC
499         select COMPAT_OLD_SIGACTION
500 
501 config SYSVIPC_COMPAT
502         bool
503         depends on COMPAT && SYSVIPC
504         default y
505 
506 source "drivers/sbus/char/Kconfig"

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