# SPDX-License-Identifier: GPL-2.0-only
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config 64BIT
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bool "64-bit kernel" if "$(ARCH)" = "sparc"
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default "$(ARCH)" = "sparc64"
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help
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SPARC is a family of RISC microprocessors designed and marketed by
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Sun Microsystems, incorporated. They are very widely found in Sun
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workstations and clones.
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Say yes to build a 64-bit kernel - formerly known as sparc64
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Say no to build a 32-bit kernel - formerly known as sparc
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config SPARC
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bool
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default y
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select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
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select ARCH_MIGHT_HAVE_PC_SERIO
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select DMA_OPS
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select OF
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select OF_PROMTREE
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select HAVE_ASM_MODVERSIONS
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select HAVE_IDE
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select HAVE_OPROFILE
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select HAVE_ARCH_KGDB if !SMP || SPARC64
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select HAVE_ARCH_TRACEHOOK
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select HAVE_ARCH_SECCOMP if SPARC64
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select HAVE_EXIT_THREAD
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select HAVE_PCI
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select SYSCTL_EXCEPTION_TRACE
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select RTC_CLASS
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select RTC_DRV_M48T59
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select RTC_SYSTOHC
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select HAVE_ARCH_JUMP_LABEL if SPARC64
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select GENERIC_IRQ_SHOW
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select ARCH_WANT_IPC_PARSE_VERSION
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select GENERIC_PCI_IOMAP
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select HAVE_NMI_WATCHDOG if SPARC64
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select HAVE_CBPF_JIT if SPARC32
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select HAVE_EBPF_JIT if SPARC64
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select HAVE_DEBUG_BUGVERBOSE
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select GENERIC_SMP_IDLE_THREAD
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select GENERIC_CLOCKEVENTS
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select GENERIC_STRNCPY_FROM_USER
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select GENERIC_STRNLEN_USER
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select MODULES_USE_ELF_RELA
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select PCI_SYSCALL if PCI
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select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
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select ODD_RT_SIGACTION
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select OLD_SIGSUSPEND
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select CPU_NO_EFFICIENT_FFS
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select LOCKDEP_SMALL if LOCKDEP
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select NEED_DMA_MAP_STATE
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select NEED_SG_DMA_LENGTH
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select SET_FS
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config SPARC32
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def_bool !64BIT
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select ARCH_32BIT_OFF_T
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select ARCH_HAS_SYNC_DMA_FOR_CPU
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select GENERIC_ATOMIC64
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select CLZ_TAB
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select HAVE_UID16
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select OLD_SIGACTION
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config SPARC64
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def_bool 64BIT
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select HAVE_FUNCTION_TRACER
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select HAVE_FUNCTION_GRAPH_TRACER
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select HAVE_KRETPROBES
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select HAVE_KPROBES
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select MMU_GATHER_RCU_TABLE_FREE if SMP
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select HAVE_ARCH_TRANSPARENT_HUGEPAGE
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select HAVE_DYNAMIC_FTRACE
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select HAVE_FTRACE_MCOUNT_RECORD
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select HAVE_SYSCALL_TRACEPOINTS
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select HAVE_CONTEXT_TRACKING
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select HAVE_TIF_NOHZ
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select HAVE_DEBUG_KMEMLEAK
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select IOMMU_HELPER
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select SPARSE_IRQ
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select RTC_DRV_CMOS
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select RTC_DRV_BQ4802
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select RTC_DRV_SUN4V
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select RTC_DRV_STARFIRE
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select HAVE_PERF_EVENTS
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select PERF_USE_VMALLOC
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select ARCH_HAVE_NMI_SAFE_CMPXCHG
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select HAVE_C_RECORDMCOUNT
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select HAVE_ARCH_AUDITSYSCALL
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select ARCH_SUPPORTS_ATOMIC_RMW
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select HAVE_NMI
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select HAVE_REGS_AND_STACK_ACCESS_API
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select ARCH_USE_QUEUED_RWLOCKS
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select ARCH_USE_QUEUED_SPINLOCKS
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select GENERIC_TIME_VSYSCALL
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select ARCH_CLOCKSOURCE_DATA
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select ARCH_HAS_PTE_SPECIAL
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select PCI_DOMAINS if PCI
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select ARCH_HAS_GIGANTIC_PAGE
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config ARCH_PROC_KCORE_TEXT
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def_bool y
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config CPU_BIG_ENDIAN
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def_bool y
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config ARCH_ATU
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bool
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default y if SPARC64
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config STACKTRACE_SUPPORT
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bool
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default y if SPARC64
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config LOCKDEP_SUPPORT
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bool
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default y if SPARC64
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config ARCH_HIBERNATION_POSSIBLE
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def_bool y if SPARC64
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config AUDIT_ARCH
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bool
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default y
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config HAVE_SETUP_PER_CPU_AREA
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def_bool y if SPARC64
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config NEED_PER_CPU_EMBED_FIRST_CHUNK
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def_bool y if SPARC64
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config NEED_PER_CPU_PAGE_FIRST_CHUNK
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def_bool y if SPARC64
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config MMU
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bool
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default y
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config HIGHMEM
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bool
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default y if SPARC32
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config ZONE_DMA
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bool
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default y if SPARC32
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config GENERIC_ISA_DMA
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bool
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default y if SPARC32
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config ARCH_SUPPORTS_DEBUG_PAGEALLOC
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def_bool y if SPARC64
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config PGTABLE_LEVELS
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default 4 if 64BIT
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default 3
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config ARCH_SUPPORTS_UPROBES
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def_bool y if SPARC64
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menu "Processor type and features"
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config SMP
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bool "Symmetric multi-processing support"
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help
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This enables support for systems with more than one CPU. If you have
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a system with only one CPU, say N. If you have a system with more
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than one CPU, say Y.
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If you say N here, the kernel will run on uni- and multiprocessor
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machines, but will use only one CPU of a multiprocessor machine. If
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you say Y here, the kernel will run on many, but not all,
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uniprocessor machines. On a uniprocessor machine, the kernel
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will run faster if you say N here.
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People using multiprocessor machines who say Y here should also say
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Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
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Management" code will be disabled if you say Y here.
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See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
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available at <http://www.tldp.org/docs.html#howto>.
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If you don't know what to do here, say N.
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config NR_CPUS
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int "Maximum number of CPUs"
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depends on SMP
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range 2 32 if SPARC32
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range 2 4096 if SPARC64
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default 32 if SPARC32
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default 4096 if SPARC64
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source "kernel/Kconfig.hz"
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config GENERIC_HWEIGHT
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bool
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default y
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config GENERIC_CALIBRATE_DELAY
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bool
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default y
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config ARCH_MAY_HAVE_PC_FDC
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bool
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default y
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config EMULATED_CMPXCHG
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bool
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default y if SPARC32
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help
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Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
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is emulated, and therefore it is not completely atomic.
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# Makefile helpers
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config SPARC32_SMP
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bool
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default y
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depends on SPARC32 && SMP
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config SPARC64_SMP
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bool
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default y
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depends on SPARC64 && SMP
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config EARLYFB
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bool "Support for early boot text console"
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default y
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depends on SPARC64
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help
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Say Y here to enable a faster early framebuffer boot console.
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config HOTPLUG_CPU
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bool "Support for hot-pluggable CPUs"
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depends on SPARC64 && SMP
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help
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Say Y here to experiment with turning CPUs off and on. CPUs
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can be controlled through /sys/devices/system/cpu/cpu#.
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Say N if you want to disable CPU hotplug.
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if SPARC64
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source "drivers/cpufreq/Kconfig"
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endif
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config US3_MC
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tristate "UltraSPARC-III Memory Controller driver"
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depends on SPARC64
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default y
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help
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This adds a driver for the UltraSPARC-III memory controller.
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Loading this driver allows exact mnemonic strings to be
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printed in the event of a memory error, so that the faulty DIMM
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on the motherboard can be matched to the error.
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If in doubt, say Y, as this information can be very useful.
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# Global things across all Sun machines.
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config GENERIC_LOCKBREAK
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bool
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default y
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depends on SPARC64 && SMP && PREEMPTION
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config NUMA
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bool "NUMA support"
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depends on SPARC64 && SMP
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config NODES_SHIFT
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int "Maximum NUMA Nodes (as a power of 2)"
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range 4 5 if SPARC64
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default "5"
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depends on NEED_MULTIPLE_NODES
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help
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Specify the maximum number of NUMA Nodes available on the target
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system. Increases memory reserved to accommodate various tables.
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config ARCH_SPARSEMEM_ENABLE
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def_bool y if SPARC64
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select SPARSEMEM_VMEMMAP_ENABLE
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config ARCH_SPARSEMEM_DEFAULT
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def_bool y if SPARC64
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config FORCE_MAX_ZONEORDER
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int "Maximum zone order"
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default "13"
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help
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The kernel memory allocator divides physically contiguous memory
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blocks into "zones", where each zone is a power of two number of
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pages. This option selects the largest power of two that the kernel
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keeps in the memory allocator. If you need to allocate very large
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blocks of physically contiguous memory, then you may need to
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increase this value.
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This config option is actually maximum order plus one. For example,
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a value of 13 means that the largest free memory block is 2^12 pages.
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if SPARC64
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source "kernel/power/Kconfig"
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endif
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config SCHED_SMT
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bool "SMT (Hyperthreading) scheduler support"
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depends on SPARC64 && SMP
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default y
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help
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SMT scheduler support improves the CPU scheduler's decision making
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when dealing with SPARC cpus at a cost of slightly increased overhead
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in some places. If unsure say N here.
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config SCHED_MC
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bool "Multi-core scheduler support"
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depends on SPARC64 && SMP
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default y
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help
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Multi-core scheduler support improves the CPU scheduler's decision
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making when dealing with multi-core CPU chips at a cost of slightly
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increased overhead in some places. If unsure say N here.
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config CMDLINE_BOOL
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bool "Default bootloader kernel arguments"
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depends on SPARC64
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config CMDLINE
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string "Initial kernel command string"
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depends on CMDLINE_BOOL
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default "console=ttyS0,9600 root=/dev/sda1"
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help
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Say Y here if you want to be able to pass default arguments to
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the kernel. This will be overridden by the bootloader, if you
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use one (such as SILO). This is most useful if you want to boot
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a kernel from TFTP, and want default options to be available
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with having them passed on the command line.
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NOTE: This option WILL override the PROM bootargs setting!
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config SUN_PM
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bool
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default y if SPARC32
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help
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Enable power management and CPU standby features on supported
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SPARC platforms.
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config SPARC_LED
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tristate "Sun4m LED driver"
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depends on SPARC32
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help
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This driver toggles the front-panel LED on sun4m systems
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in a user-specifiable manner. Its state can be probed
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by reading /proc/led and its blinking mode can be changed
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via writes to /proc/led
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config SERIAL_CONSOLE
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bool
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depends on SPARC32
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default y
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help
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If you say Y here, it will be possible to use a serial port as the
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system console (the system console is the device which receives all
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kernel messages and warnings and which allows logins in single user
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mode). This could be useful if some terminal or printer is connected
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to that serial port.
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Even if you say Y here, the currently visible virtual console
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(/dev/tty0) will still be used as the system console by default, but
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you can alter that using a kernel command line option such as
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"console=ttyS1". (Try "man bootparam" or see the documentation of
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your boot loader (silo) about how to pass options to the kernel at
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boot time.)
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If you don't have a graphics card installed and you say Y here, the
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kernel will automatically use the first serial line, /dev/ttyS0, as
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system console.
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If unsure, say N.
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config SPARC_LEON
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bool "Sparc Leon processor family"
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depends on SPARC32
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select USB_EHCI_BIG_ENDIAN_MMIO
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select USB_EHCI_BIG_ENDIAN_DESC
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select USB_UHCI_BIG_ENDIAN_MMIO
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select USB_UHCI_BIG_ENDIAN_DESC
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help
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If you say Y here if you are running on a SPARC-LEON processor.
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The LEON processor is a synthesizable VHDL model of the
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SPARC-v8 standard. LEON is part of the GRLIB collection of
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IP cores that are distributed under GPL. GRLIB can be downloaded
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from www.gaisler.com. You can download a sparc-linux cross-compilation
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toolchain at www.gaisler.com.
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if SPARC_LEON
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menu "U-Boot options"
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config UBOOT_LOAD_ADDR
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hex "uImage Load Address"
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default 0x40004000
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help
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U-Boot kernel load address, the address in physical address space
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where u-boot will place the Linux kernel before booting it.
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This address is normally the base address of main memory + 0x4000.
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config UBOOT_FLASH_ADDR
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hex "uImage.o Load Address"
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default 0x00080000
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help
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Optional setting only affecting the uImage.o ELF-image used to
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download the uImage file to the target using a ELF-loader other than
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U-Boot. It may for example be used to download an uImage to FLASH with
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the GRMON utility before even starting u-boot.
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config UBOOT_ENTRY_ADDR
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hex "uImage Entry Address"
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default 0xf0004000
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help
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Do not change this unless you know what you're doing. This is
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hardcoded by the SPARC32 and LEON port.
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This is the virtual address u-boot jumps to when booting the Linux
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Kernel.
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endmenu
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endif
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endmenu
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menu "Bus options (PCI etc.)"
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config SBUS
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bool
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default y
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config SBUSCHAR
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bool
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default y
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config SUN_LDOMS
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bool "Sun Logical Domains support"
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depends on SPARC64
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help
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Say Y here is you want to support virtual devices via
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Logical Domains.
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config PCIC_PCI
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bool
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depends on PCI && SPARC32 && !SPARC_LEON
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default y
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config LEON_PCI
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bool
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depends on PCI && SPARC_LEON
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default y
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config SPARC_GRPCI1
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bool "GRPCI Host Bridge Support"
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depends on LEON_PCI
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default y
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help
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Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
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PCI host controller is typically found in GRLIB SPARC32/LEON
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systems. The driver has one property (all_pci_errors) controlled
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from the bootloader that makes the GRPCI to generate interrupts
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on detected PCI Parity and System errors.
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config SPARC_GRPCI2
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bool "GRPCI2 Host Bridge Support"
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depends on LEON_PCI
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default y
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help
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Say Y here to include the GRPCI2 Host Bridge Driver.
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config SUN_OPENPROMFS
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tristate "Openprom tree appears in /proc/openprom"
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help
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If you say Y, the OpenPROM device tree will be available as a
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virtual file system, which you can mount to /proc/openprom by "mount
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-t openpromfs none /proc/openprom".
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To compile the /proc/openprom support as a module, choose M here: the
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module will be called openpromfs.
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Only choose N if you know in advance that you will not need to modify
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OpenPROM settings on the running system.
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# Makefile helpers
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config SPARC64_PCI
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bool
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default y
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depends on SPARC64 && PCI
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config SPARC64_PCI_MSI
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bool
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default y
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depends on SPARC64_PCI && PCI_MSI
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endmenu
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config COMPAT
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bool
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depends on SPARC64
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default y
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select COMPAT_BINFMT_ELF if BINFMT_ELF
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select HAVE_UID16
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select ARCH_WANT_OLD_COMPAT_IPC
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select COMPAT_OLD_SIGACTION
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config SYSVIPC_COMPAT
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bool
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depends on COMPAT && SYSVIPC
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default y
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source "drivers/sbus/char/Kconfig"
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