Current File : //usr/src/linux-headers-5.15.0-125-generic/arch/sparc/Kconfig
# 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 HAVE_NMI_WATCHDOG 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 SET_FS
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 GENERIC_ATOMIC64
select CLZ_TAB
select HAVE_UID16
select OLD_SIGACTION
select ZONE_DMA
config SPARC64
def_bool 64BIT
select HAVE_FUNCTION_TRACER
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_KRETPROBES
select HAVE_KPROBES
select MMU_GATHER_RCU_TABLE_FREE if SMP
select HAVE_ARCH_TRANSPARENT_HUGEPAGE
select HAVE_DYNAMIC_FTRACE
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_SYSCALL_TRACEPOINTS
select HAVE_CONTEXT_TRACKING
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
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 HAVE_SETUP_PER_CPU_AREA
def_bool y if SPARC64
config NEED_PER_CPU_EMBED_FIRST_CHUNK
def_bool y if SPARC64
config NEED_PER_CPU_PAGE_FIRST_CHUNK
def_bool y if SPARC64
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 FORCE_MAX_ZONEORDER
int "Maximum zone order"
default "13"
help
The kernel memory allocator divides physically contiguous memory
blocks into "zones", where each zone is a power of two number of
pages. This option selects the largest power of two that the kernel
keeps in the memory allocator. If you need to allocate very large
blocks of physically contiguous memory, then you may need to
increase this value.
This config option is actually maximum order plus one. For example,
a value of 13 means that the largest free memory block is 2^12 pages.
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
config SYSVIPC_COMPAT
bool
depends on COMPAT && SYSVIPC
default y
source "drivers/sbus/char/Kconfig"
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