# SPDX-License-Identifier: GPL-2.0-only config 64BIT bool "64-bit kernel" if "$(ARCH)" = "sparc" default "$(ARCH)" = "sparc64" help SPARC is a family of RISC microprocessors designed and marketed by Sun Microsystems, incorporated. They are very widely found in Sun workstations and clones. Say yes to build a 64-bit kernel - formerly known as sparc64 Say no to build a 32-bit kernel - formerly known as sparc config SPARC bool default y select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI select ARCH_MIGHT_HAVE_PC_SERIO select DMA_OPS select OF select OF_PROMTREE select HAVE_ASM_MODVERSIONS select HAVE_ARCH_KGDB if !SMP || SPARC64 select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_SECCOMP if SPARC64 select HAVE_EXIT_THREAD select HAVE_PCI select SYSCTL_EXCEPTION_TRACE select RTC_CLASS select RTC_DRV_M48T59 select RTC_SYSTOHC select HAVE_ARCH_JUMP_LABEL if SPARC64 select GENERIC_IRQ_SHOW select ARCH_WANT_IPC_PARSE_VERSION select GENERIC_PCI_IOMAP select HAS_IOPORT select HAVE_HARDLOCKUP_DETECTOR_SPARC64 if SPARC64 select HAVE_CBPF_JIT if SPARC32 select HAVE_EBPF_JIT if SPARC64 select HAVE_DEBUG_BUGVERBOSE select GENERIC_SMP_IDLE_THREAD select MODULES_USE_ELF_RELA select PCI_SYSCALL if PCI select PCI_MSI_ARCH_FALLBACKS if PCI_MSI select ODD_RT_SIGACTION select OLD_SIGSUSPEND select CPU_NO_EFFICIENT_FFS select LOCKDEP_SMALL if LOCKDEP select NEED_DMA_MAP_STATE select NEED_SG_DMA_LENGTH select TRACE_IRQFLAGS_SUPPORT config SPARC32 def_bool !64BIT select ARCH_32BIT_OFF_T select ARCH_HAS_CPU_FINALIZE_INIT if !SMP select ARCH_HAS_SYNC_DMA_FOR_CPU select CLZ_TAB select DMA_DIRECT_REMAP select GENERIC_ATOMIC64 select HAVE_UID16 select LOCK_MM_AND_FIND_VMA select OLD_SIGACTION select ZONE_DMA config SPARC64 def_bool 64BIT select ALTERNATE_USER_ADDRESS_SPACE select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_GRAPH_TRACER select HAVE_KRETPROBES select HAVE_KPROBES select MMU_GATHER_RCU_TABLE_FREE if SMP select MMU_GATHER_MERGE_VMAS select MMU_GATHER_NO_FLUSH_CACHE select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_DYNAMIC_FTRACE select HAVE_FTRACE_MCOUNT_RECORD select HAVE_SYSCALL_TRACEPOINTS select HAVE_CONTEXT_TRACKING_USER select HAVE_TIF_NOHZ select HAVE_DEBUG_KMEMLEAK select IOMMU_HELPER select SPARSE_IRQ select RTC_DRV_CMOS select RTC_DRV_BQ4802 select RTC_DRV_SUN4V select RTC_DRV_STARFIRE select HAVE_PERF_EVENTS select PERF_USE_VMALLOC select ARCH_HAVE_NMI_SAFE_CMPXCHG select HAVE_C_RECORDMCOUNT select HAVE_ARCH_AUDITSYSCALL select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_SUPPORTS_DEBUG_PAGEALLOC select HAVE_NMI select HAVE_REGS_AND_STACK_ACCESS_API select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS select GENERIC_TIME_VSYSCALL select ARCH_CLOCKSOURCE_DATA select ARCH_HAS_PTE_SPECIAL select PCI_DOMAINS if PCI select ARCH_HAS_GIGANTIC_PAGE select HAVE_SOFTIRQ_ON_OWN_STACK select HAVE_SETUP_PER_CPU_AREA select NEED_PER_CPU_EMBED_FIRST_CHUNK select NEED_PER_CPU_PAGE_FIRST_CHUNK config ARCH_PROC_KCORE_TEXT def_bool y config CPU_BIG_ENDIAN def_bool y config ARCH_ATU bool default y if SPARC64 config STACKTRACE_SUPPORT bool default y if SPARC64 config LOCKDEP_SUPPORT bool default y if SPARC64 config ARCH_HIBERNATION_POSSIBLE def_bool y if SPARC64 config AUDIT_ARCH bool default y config MMU bool default y config HIGHMEM bool default y if SPARC32 select KMAP_LOCAL config GENERIC_ISA_DMA bool default y if SPARC32 config PGTABLE_LEVELS default 4 if 64BIT default 3 config ARCH_SUPPORTS_UPROBES def_bool y if SPARC64 menu "Processor type and features" config SMP bool "Symmetric multi-processing support" help This enables support for systems with more than one CPU. If you have a system with only one CPU, say N. If you have a system with more than one CPU, say Y. If you say N here, the kernel will run on uni- and multiprocessor machines, but will use only one CPU of a multiprocessor machine. If you say Y here, the kernel will run on many, but not all, uniprocessor machines. On a uniprocessor machine, the kernel will run faster if you say N here. People using multiprocessor machines who say Y here should also say Y to "Enhanced Real Time Clock Support", below. The "Advanced Power Management" code will be disabled if you say Y here. See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO available at <https://www.tldp.org/docs.html#howto>. If you don't know what to do here, say N. config NR_CPUS int "Maximum number of CPUs" depends on SMP range 2 32 if SPARC32 range 2 4096 if SPARC64 default 32 if SPARC32 default 4096 if SPARC64 source "kernel/Kconfig.hz" config GENERIC_HWEIGHT bool default y config GENERIC_CALIBRATE_DELAY bool default y config ARCH_MAY_HAVE_PC_FDC bool default y config EMULATED_CMPXCHG bool default y if SPARC32 help Sparc32 does not have a CAS instruction like sparc64. cmpxchg() is emulated, and therefore it is not completely atomic. # Makefile helpers config SPARC32_SMP bool default y depends on SPARC32 && SMP config SPARC64_SMP bool default y depends on SPARC64 && SMP config EARLYFB bool "Support for early boot text console" default y depends on SPARC64 help Say Y here to enable a faster early framebuffer boot console. config HOTPLUG_CPU bool "Support for hot-pluggable CPUs" depends on SPARC64 && SMP help Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu#. Say N if you want to disable CPU hotplug. if SPARC64 source "drivers/cpufreq/Kconfig" endif config US3_MC tristate "UltraSPARC-III Memory Controller driver" depends on SPARC64 default y help This adds a driver for the UltraSPARC-III memory controller. Loading this driver allows exact mnemonic strings to be printed in the event of a memory error, so that the faulty DIMM on the motherboard can be matched to the error. If in doubt, say Y, as this information can be very useful. # Global things across all Sun machines. config GENERIC_LOCKBREAK bool default y depends on SPARC64 && SMP && PREEMPTION config NUMA bool "NUMA support" depends on SPARC64 && SMP config NODES_SHIFT int "Maximum NUMA Nodes (as a power of 2)" range 4 5 if SPARC64 default "5" depends on NUMA help Specify the maximum number of NUMA Nodes available on the target system. Increases memory reserved to accommodate various tables. config ARCH_SPARSEMEM_ENABLE def_bool y if SPARC64 select SPARSEMEM_VMEMMAP_ENABLE config ARCH_SPARSEMEM_DEFAULT def_bool y if SPARC64 config ARCH_FORCE_MAX_ORDER int "Order of maximal physically contiguous allocations" default "12" help The kernel page allocator limits the size of maximal physically contiguous allocations. The limit is called MAX_ORDER and it defines the maximal power of two of number of pages that can be allocated as a single contiguous block. This option allows overriding the default setting when ability to allocate very large blocks of physically contiguous memory is required. Don't change if unsure. if SPARC64 || COMPILE_TEST source "kernel/power/Kconfig" endif config SCHED_SMT bool "SMT (Hyperthreading) scheduler support" depends on SPARC64 && SMP default y help SMT scheduler support improves the CPU scheduler's decision making when dealing with SPARC cpus at a cost of slightly increased overhead in some places. If unsure say N here. config SCHED_MC bool "Multi-core scheduler support" depends on SPARC64 && SMP default y help Multi-core scheduler support improves the CPU scheduler's decision making when dealing with multi-core CPU chips at a cost of slightly increased overhead in some places. If unsure say N here. config CMDLINE_BOOL bool "Default bootloader kernel arguments" depends on SPARC64 config CMDLINE string "Initial kernel command string" depends on CMDLINE_BOOL default "console=ttyS0,9600 root=/dev/sda1" help Say Y here if you want to be able to pass default arguments to the kernel. This will be overridden by the bootloader, if you use one (such as SILO). This is most useful if you want to boot a kernel from TFTP, and want default options to be available with having them passed on the command line. NOTE: This option WILL override the PROM bootargs setting! config SUN_PM bool default y if SPARC32 help Enable power management and CPU standby features on supported SPARC platforms. config SPARC_LED tristate "Sun4m LED driver" depends on SPARC32 help This driver toggles the front-panel LED on sun4m systems in a user-specifiable manner. Its state can be probed by reading /proc/led and its blinking mode can be changed via writes to /proc/led config SERIAL_CONSOLE bool depends on SPARC32 default y help If you say Y here, it will be possible to use a serial port as the system console (the system console is the device which receives all kernel messages and warnings and which allows logins in single user mode). This could be useful if some terminal or printer is connected to that serial port. Even if you say Y here, the currently visible virtual console (/dev/tty0) will still be used as the system console by default, but you can alter that using a kernel command line option such as "console=ttyS1". (Try "man bootparam" or see the documentation of your boot loader (silo) about how to pass options to the kernel at boot time.) If you don't have a graphics card installed and you say Y here, the kernel will automatically use the first serial line, /dev/ttyS0, as system console. If unsure, say N. config SPARC_LEON bool "Sparc Leon processor family" depends on SPARC32 select USB_EHCI_BIG_ENDIAN_MMIO select USB_EHCI_BIG_ENDIAN_DESC select USB_UHCI_BIG_ENDIAN_MMIO select USB_UHCI_BIG_ENDIAN_DESC help If you say Y here if you are running on a SPARC-LEON processor. The LEON processor is a synthesizable VHDL model of the SPARC-v8 standard. LEON is part of the GRLIB collection of IP cores that are distributed under GPL. GRLIB can be downloaded from www.gaisler.com. You can download a sparc-linux cross-compilation toolchain at www.gaisler.com. if SPARC_LEON menu "U-Boot options" config UBOOT_LOAD_ADDR hex "uImage Load Address" default 0x40004000 help U-Boot kernel load address, the address in physical address space where u-boot will place the Linux kernel before booting it. This address is normally the base address of main memory + 0x4000. config UBOOT_FLASH_ADDR hex "uImage.o Load Address" default 0x00080000 help Optional setting only affecting the uImage.o ELF-image used to download the uImage file to the target using a ELF-loader other than U-Boot. It may for example be used to download an uImage to FLASH with the GRMON utility before even starting u-boot. config UBOOT_ENTRY_ADDR hex "uImage Entry Address" default 0xf0004000 help Do not change this unless you know what you're doing. This is hardcoded by the SPARC32 and LEON port. This is the virtual address u-boot jumps to when booting the Linux Kernel. endmenu endif endmenu menu "Bus options (PCI etc.)" config SBUS bool default y config SBUSCHAR bool default y config SUN_LDOMS bool "Sun Logical Domains support" depends on SPARC64 help Say Y here is you want to support virtual devices via Logical Domains. config PCIC_PCI bool depends on PCI && SPARC32 && !SPARC_LEON default y config LEON_PCI bool depends on PCI && SPARC_LEON default y config SPARC_GRPCI1 bool "GRPCI Host Bridge Support" depends on LEON_PCI default y help Say Y here to include the GRPCI Host Bridge Driver. The GRPCI PCI host controller is typically found in GRLIB SPARC32/LEON systems. The driver has one property (all_pci_errors) controlled from the bootloader that makes the GRPCI to generate interrupts on detected PCI Parity and System errors. config SPARC_GRPCI2 bool "GRPCI2 Host Bridge Support" depends on LEON_PCI default y help Say Y here to include the GRPCI2 Host Bridge Driver. config SUN_OPENPROMFS tristate "Openprom tree appears in /proc/openprom" help If you say Y, the OpenPROM device tree will be available as a virtual file system, which you can mount to /proc/openprom by "mount -t openpromfs none /proc/openprom". To compile the /proc/openprom support as a module, choose M here: the module will be called openpromfs. Only choose N if you know in advance that you will not need to modify OpenPROM settings on the running system. # Makefile helpers config SPARC64_PCI bool default y depends on SPARC64 && PCI config SPARC64_PCI_MSI bool default y depends on SPARC64_PCI && PCI_MSI endmenu config COMPAT bool depends on SPARC64 default y select HAVE_UID16 select ARCH_WANT_OLD_COMPAT_IPC select COMPAT_OLD_SIGACTION source "drivers/sbus/char/Kconfig"