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TOMOYO Linux Cross Reference
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_HAS_CPU_CACHE_ALIASING
 17         select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
 18         select ARCH_MIGHT_HAVE_PC_SERIO
 19         select DMA_OPS
 20         select OF
 21         select OF_PROMTREE
 22         select HAVE_ASM_MODVERSIONS
 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 HAS_IOPORT
 37         select HAVE_HARDLOCKUP_DETECTOR_SPARC64 if SPARC64
 38         select HAVE_CBPF_JIT if SPARC32
 39         select HAVE_EBPF_JIT if SPARC64
 40         select HAVE_DEBUG_BUGVERBOSE
 41         select GENERIC_SMP_IDLE_THREAD
 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 TRACE_IRQFLAGS_SUPPORT
 52 
 53 config SPARC32
 54         def_bool !64BIT
 55         select ARCH_32BIT_OFF_T
 56         select ARCH_HAS_CPU_FINALIZE_INIT if !SMP
 57         select ARCH_HAS_SYNC_DMA_FOR_CPU
 58         select CLZ_TAB
 59         select DMA_DIRECT_REMAP
 60         select GENERIC_ATOMIC64
 61         select GENERIC_LIB_CMPDI2
 62         select GENERIC_LIB_UCMPDI2
 63         select HAVE_UID16
 64         select HAVE_PAGE_SIZE_4KB
 65         select LOCK_MM_AND_FIND_VMA
 66         select OLD_SIGACTION
 67         select ZONE_DMA
 68 
 69 config SPARC64
 70         def_bool 64BIT
 71         select ALTERNATE_USER_ADDRESS_SPACE
 72         select HAVE_FUNCTION_TRACER
 73         select HAVE_FUNCTION_GRAPH_TRACER
 74         select HAVE_KRETPROBES
 75         select HAVE_KPROBES
 76         select MMU_GATHER_RCU_TABLE_FREE if SMP
 77         select MMU_GATHER_MERGE_VMAS
 78         select MMU_GATHER_NO_FLUSH_CACHE
 79         select HAVE_ARCH_TRANSPARENT_HUGEPAGE
 80         select HAVE_DYNAMIC_FTRACE
 81         select HAVE_FTRACE_MCOUNT_RECORD
 82         select HAVE_PAGE_SIZE_8KB
 83         select HAVE_SYSCALL_TRACEPOINTS
 84         select HAVE_CONTEXT_TRACKING_USER
 85         select HAVE_TIF_NOHZ
 86         select HAVE_DEBUG_KMEMLEAK
 87         select IOMMU_HELPER
 88         select SPARSE_IRQ
 89         select RTC_DRV_CMOS
 90         select RTC_DRV_BQ4802
 91         select RTC_DRV_SUN4V
 92         select RTC_DRV_STARFIRE
 93         select HAVE_PERF_EVENTS
 94         select PERF_USE_VMALLOC
 95         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 96         select HAVE_C_RECORDMCOUNT
 97         select HAVE_ARCH_AUDITSYSCALL
 98         select ARCH_SUPPORTS_ATOMIC_RMW
 99         select ARCH_SUPPORTS_DEBUG_PAGEALLOC
100         select HAVE_NMI
101         select HAVE_REGS_AND_STACK_ACCESS_API
102         select ARCH_USE_QUEUED_RWLOCKS
103         select ARCH_USE_QUEUED_SPINLOCKS
104         select GENERIC_TIME_VSYSCALL
105         select ARCH_CLOCKSOURCE_DATA
106         select ARCH_HAS_PTE_SPECIAL
107         select PCI_DOMAINS if PCI
108         select ARCH_HAS_GIGANTIC_PAGE
109         select HAVE_SOFTIRQ_ON_OWN_STACK
110         select HAVE_SETUP_PER_CPU_AREA
111         select NEED_PER_CPU_EMBED_FIRST_CHUNK
112         select NEED_PER_CPU_PAGE_FIRST_CHUNK
113 
114 config ARCH_PROC_KCORE_TEXT
115         def_bool y
116 
117 config CPU_BIG_ENDIAN
118         def_bool y
119 
120 config STACKTRACE_SUPPORT
121         bool
122         default y if SPARC64
123 
124 config LOCKDEP_SUPPORT
125         bool
126         default y if SPARC64
127 
128 config ARCH_HIBERNATION_POSSIBLE
129         def_bool y if SPARC64
130 
131 config AUDIT_ARCH
132         bool
133         default y
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 PGTABLE_LEVELS
145         default 4 if 64BIT
146         default 3
147 
148 config ARCH_SUPPORTS_UPROBES
149         def_bool y if SPARC64
150 
151 menu "Processor type and features"
152 
153 config 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 
175 config 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 
183 source "kernel/Kconfig.hz"
184 
185 config GENERIC_HWEIGHT
186         bool
187         default y
188 
189 config GENERIC_CALIBRATE_DELAY
190         bool
191         default y
192 
193 config ARCH_MAY_HAVE_PC_FDC
194         bool
195         default y
196 
197 config 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
205 config SPARC32_SMP
206         bool
207         default y
208         depends on SPARC32 && SMP
209 
210 config SPARC64_SMP
211         bool
212         default y
213         depends on SPARC64 && SMP
214 
215 config EARLYFB
216         bool "Support for early boot text console"
217         default y
218         depends on SPARC64
219         select FONT_SUN8x16
220         select FONT_SUPPORT
221         help
222           Say Y here to enable a faster early framebuffer boot console.
223 
224 config HOTPLUG_CPU
225         bool "Support for hot-pluggable CPUs"
226         depends on SPARC64 && SMP
227         help
228           Say Y here to experiment with turning CPUs off and on.  CPUs
229           can be controlled through /sys/devices/system/cpu/cpu#.
230           Say N if you want to disable CPU hotplug.
231 
232 if SPARC64
233 source "drivers/cpufreq/Kconfig"
234 endif
235 
236 config US3_MC
237         tristate "UltraSPARC-III Memory Controller driver"
238         depends on SPARC64
239         default y
240         help
241           This adds a driver for the UltraSPARC-III memory controller.
242           Loading this driver allows exact mnemonic strings to be
243           printed in the event of a memory error, so that the faulty DIMM
244           on the motherboard can be matched to the error.
245 
246           If in doubt, say Y, as this information can be very useful.
247 
248 # Global things across all Sun machines.
249 config GENERIC_LOCKBREAK
250         bool
251         default y
252         depends on SPARC64 && SMP && PREEMPTION
253 
254 config NUMA
255         bool "NUMA support"
256         depends on SPARC64 && SMP
257 
258 config NODES_SHIFT
259         int "Maximum NUMA Nodes (as a power of 2)"
260         range 4 5 if SPARC64
261         default "5"
262         depends on NUMA
263         help
264           Specify the maximum number of NUMA Nodes available on the target
265           system.  Increases memory reserved to accommodate various tables.
266 
267 config ARCH_SPARSEMEM_ENABLE
268         def_bool y if SPARC64
269         select SPARSEMEM_VMEMMAP_ENABLE
270 
271 config ARCH_SPARSEMEM_DEFAULT
272         def_bool y if SPARC64
273 
274 config ARCH_FORCE_MAX_ORDER
275         int "Order of maximal physically contiguous allocations"
276         default "12"
277         help
278           The kernel page allocator limits the size of maximal physically
279           contiguous allocations. The limit is called MAX_PAGE_ORDER and it
280           defines the maximal power of two of number of pages that can be
281           allocated as a single contiguous block. This option allows
282           overriding the default setting when ability to allocate very
283           large blocks of physically contiguous memory is required.
284 
285           Don't change if unsure.
286 
287 if SPARC64 || COMPILE_TEST
288 source "kernel/power/Kconfig"
289 endif
290 
291 config SCHED_SMT
292         bool "SMT (Hyperthreading) scheduler support"
293         depends on SPARC64 && SMP
294         default y
295         help
296           SMT scheduler support improves the CPU scheduler's decision making
297           when dealing with SPARC cpus at a cost of slightly increased overhead
298           in some places. If unsure say N here.
299 
300 config SCHED_MC
301         bool "Multi-core scheduler support"
302         depends on SPARC64 && SMP
303         default y
304         help
305           Multi-core scheduler support improves the CPU scheduler's decision
306           making when dealing with multi-core CPU chips at a cost of slightly
307           increased overhead in some places. If unsure say N here.
308 
309 config CMDLINE_BOOL
310         bool "Default bootloader kernel arguments"
311         depends on SPARC64
312 
313 config CMDLINE
314         string "Initial kernel command string"
315         depends on CMDLINE_BOOL
316         default "console=ttyS0,9600 root=/dev/sda1"
317         help
318           Say Y here if you want to be able to pass default arguments to
319           the kernel. This will be overridden by the bootloader, if you
320           use one (such as SILO). This is most useful if you want to boot
321           a kernel from TFTP, and want default options to be available
322           with having them passed on the command line.
323 
324           NOTE: This option WILL override the PROM bootargs setting!
325 
326 config SUN_PM
327         bool
328         default y if SPARC32
329         help
330           Enable power management and CPU standby features on supported
331           SPARC platforms.
332 
333 config SPARC_LED
334         tristate "Sun4m LED driver"
335         depends on SPARC32
336         help
337           This driver toggles the front-panel LED on sun4m systems
338           in a user-specifiable manner.  Its state can be probed
339           by reading /proc/led and its blinking mode can be changed
340           via writes to /proc/led
341 
342 config SERIAL_CONSOLE
343         bool
344         depends on SPARC32
345         default y
346         help
347           If you say Y here, it will be possible to use a serial port as the
348           system console (the system console is the device which receives all
349           kernel messages and warnings and which allows logins in single user
350           mode). This could be useful if some terminal or printer is connected
351           to that serial port.
352 
353           Even if you say Y here, the currently visible virtual console
354           (/dev/tty0) will still be used as the system console by default, but
355           you can alter that using a kernel command line option such as
356           "console=ttyS1". (Try "man bootparam" or see the documentation of
357           your boot loader (silo) about how to pass options to the kernel at
358           boot time.)
359 
360           If you don't have a graphics card installed and you say Y here, the
361           kernel will automatically use the first serial line, /dev/ttyS0, as
362           system console.
363 
364           If unsure, say N.
365 
366 config SPARC_LEON
367         bool "Sparc Leon processor family"
368         depends on SPARC32
369         select USB_EHCI_BIG_ENDIAN_MMIO
370         select USB_EHCI_BIG_ENDIAN_DESC
371         select USB_UHCI_BIG_ENDIAN_MMIO
372         select USB_UHCI_BIG_ENDIAN_DESC
373         help
374           If you say Y here if you are running on a SPARC-LEON processor.
375           The LEON processor is a synthesizable VHDL model of the
376           SPARC-v8 standard. LEON is  part of the GRLIB collection of
377           IP cores that are distributed under GPL. GRLIB can be downloaded
378           from www.gaisler.com. You can download a sparc-linux cross-compilation
379           toolchain at www.gaisler.com.
380 
381 if SPARC_LEON
382 menu "U-Boot options"
383 
384 config UBOOT_LOAD_ADDR
385         hex "uImage Load Address"
386         default 0x40004000
387         help
388          U-Boot kernel load address, the address in physical address space
389          where u-boot will place the Linux kernel before booting it.
390          This address is normally the base address of main memory + 0x4000.
391 
392 config UBOOT_FLASH_ADDR
393         hex "uImage.o Load Address"
394         default 0x00080000
395         help
396          Optional setting only affecting the uImage.o ELF-image used to
397          download the uImage file to the target using a ELF-loader other than
398          U-Boot. It may for example be used to download an uImage to FLASH with
399          the GRMON utility before even starting u-boot.
400 
401 config UBOOT_ENTRY_ADDR
402         hex "uImage Entry Address"
403         default 0xf0004000
404         help
405          Do not change this unless you know what you're doing. This is
406          hardcoded by the SPARC32 and LEON port.
407 
408          This is the virtual address u-boot jumps to when booting the Linux
409          Kernel.
410 
411 endmenu
412 endif
413 
414 endmenu
415 
416 menu "Bus options (PCI etc.)"
417 config SBUS
418         bool
419         default y
420 
421 config SBUSCHAR
422         bool
423         default y
424 
425 config SUN_LDOMS
426         bool "Sun Logical Domains support"
427         depends on SPARC64
428         help
429           Say Y here is you want to support virtual devices via
430           Logical Domains.
431 
432 config PCIC_PCI
433         bool
434         depends on PCI && SPARC32 && !SPARC_LEON
435         default y
436 
437 config LEON_PCI
438         bool
439         depends on PCI && SPARC_LEON
440         default y
441 
442 config SPARC_GRPCI1
443         bool "GRPCI Host Bridge Support"
444         depends on LEON_PCI
445         default y
446         help
447           Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
448           PCI host controller is typically found in GRLIB SPARC32/LEON
449           systems. The driver has one property (all_pci_errors) controlled
450           from the bootloader that makes the GRPCI to generate interrupts
451           on detected PCI Parity and System errors.
452 
453 config SPARC_GRPCI2
454         bool "GRPCI2 Host Bridge Support"
455         depends on LEON_PCI
456         default y
457         help
458           Say Y here to include the GRPCI2 Host Bridge Driver.
459 
460 config SUN_OPENPROMFS
461         tristate "Openprom tree appears in /proc/openprom"
462         help
463           If you say Y, the OpenPROM device tree will be available as a
464           virtual file system, which you can mount to /proc/openprom by "mount
465           -t openpromfs none /proc/openprom".
466 
467           To compile the /proc/openprom support as a module, choose M here: the
468           module will be called openpromfs.
469 
470           Only choose N if you know in advance that you will not need to modify
471           OpenPROM settings on the running system.
472 
473 # Makefile helpers
474 config SPARC64_PCI
475         bool
476         default y
477         depends on SPARC64 && PCI
478 
479 config SPARC64_PCI_MSI
480         bool
481         default y
482         depends on SPARC64_PCI && PCI_MSI
483 
484 endmenu
485 
486 config COMPAT
487         bool
488         depends on SPARC64
489         default y
490         select HAVE_UID16
491         select ARCH_WANT_OLD_COMPAT_IPC
492         select COMPAT_OLD_SIGACTION
493 
494 source "drivers/sbus/char/Kconfig"

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