arch/sparc/Kconfig

   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_OPROFILE
  24         select HAVE_ARCH_KGDB if !SMP || SPARC64
  25         select HAVE_ARCH_TRACEHOOK
  26         select HAVE_ARCH_SECCOMP if SPARC64
  27         select HAVE_EXIT_THREAD
  28         select HAVE_PCI
  29         select SYSCTL_EXCEPTION_TRACE
  30         select RTC_CLASS
  31         select RTC_DRV_M48T59
  32         select RTC_SYSTOHC
  33         select HAVE_ARCH_JUMP_LABEL if SPARC64
  34         select GENERIC_IRQ_SHOW
  35         select ARCH_WANT_IPC_PARSE_VERSION
  36         select GENERIC_PCI_IOMAP
  37         select HAVE_NMI_WATCHDOG 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 GENERIC_STRNCPY_FROM_USER
  43         select GENERIC_STRNLEN_USER
  44         select MODULES_USE_ELF_RELA
  45         select PCI_SYSCALL if PCI
  46         select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
  47         select ODD_RT_SIGACTION
  48         select OLD_SIGSUSPEND
  49         select CPU_NO_EFFICIENT_FFS
  50         select LOCKDEP_SMALL if LOCKDEP
  51         select NEED_DMA_MAP_STATE
  52         select NEED_SG_DMA_LENGTH
  53         select SET_FS
  54
  55 config SPARC32
  56         def_bool !64BIT
  57         select ARCH_32BIT_OFF_T
  58         select ARCH_HAS_SYNC_DMA_FOR_CPU
  59         select GENERIC_ATOMIC64
  60         select CLZ_TAB
  61         select HAVE_UID16
  62         select OLD_SIGACTION
  63
  64 config SPARC64
  65         def_bool 64BIT
  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 HAVE_ARCH_TRANSPARENT_HUGEPAGE
  72         select HAVE_DYNAMIC_FTRACE
  73         select HAVE_FTRACE_MCOUNT_RECORD
  74         select HAVE_SYSCALL_TRACEPOINTS
  75         select HAVE_CONTEXT_TRACKING
  76         select HAVE_TIF_NOHZ
  77         select HAVE_DEBUG_KMEMLEAK
  78         select IOMMU_HELPER
  79         select SPARSE_IRQ
  80         select RTC_DRV_CMOS
  81         select RTC_DRV_BQ4802
  82         select RTC_DRV_SUN4V
  83         select RTC_DRV_STARFIRE
  84         select HAVE_PERF_EVENTS
  85         select PERF_USE_VMALLOC
  86         select ARCH_HAVE_NMI_SAFE_CMPXCHG
  87         select HAVE_C_RECORDMCOUNT
  88         select HAVE_ARCH_AUDITSYSCALL
  89         select ARCH_SUPPORTS_ATOMIC_RMW
  90         select ARCH_SUPPORTS_DEBUG_PAGEALLOC
  91         select HAVE_NMI
  92         select HAVE_REGS_AND_STACK_ACCESS_API
  93         select ARCH_USE_QUEUED_RWLOCKS
  94         select ARCH_USE_QUEUED_SPINLOCKS
  95         select GENERIC_TIME_VSYSCALL
  96         select ARCH_CLOCKSOURCE_DATA
  97         select ARCH_HAS_PTE_SPECIAL
  98         select PCI_DOMAINS if PCI
  99         select ARCH_HAS_GIGANTIC_PAGE
 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 COMPAT_BINFMT_ELF
 498         select HAVE_UID16
 499         select ARCH_WANT_OLD_COMPAT_IPC
 500         select COMPAT_OLD_SIGACTION
 501
 502 config SYSVIPC_COMPAT
 503         bool
 504         depends on COMPAT && SYSVIPC
 505         default y
 506
 507 source "drivers/sbus/char/Kconfig"