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