# 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_HAS_CPU_CACHE_ALIASING
select ARCH_HAS_DMA_OPS
select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
select ARCH_MIGHT_HAVE_PC_SERIO
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 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 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
select FONT_SUN8x16
select FONT_SUPPORT
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_PAGE_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 Donot 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"
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