path: root/arch/riscv/Kconfig

menu "RISC-V architecture"
	depends on RISCV

config SYS_ARCH
	default "riscv"

choice
	prompt "Target select"
	optional

config TARGET_AX25_AE350
	bool "Support ax25-ae350"

config TARGET_MICROCHIP_ICICLE
	bool "Support Microchip PolarFire-SoC Icicle Board"

config TARGET_QEMU_VIRT
	bool "Support QEMU Virt Board"

config TARGET_SIFIVE_UNLEASHED
	bool "Support SiFive Unleashed Board"

config TARGET_SIFIVE_UNMATCHED
	bool "Support SiFive Unmatched Board"
	select SYS_CACHE_SHIFT_6

config TARGET_SIPEED_MAIX
	bool "Support Sipeed Maix Board"
	select SYS_CACHE_SHIFT_6

config TARGET_OPENPITON_RISCV64
	bool "Support RISC-V cores on OpenPiton SoC"

endchoice

config SYS_ICACHE_OFF
	bool "Do not enable icache"
	help
	  Do not enable instruction cache in U-Boot.

config SPL_SYS_ICACHE_OFF
	bool "Do not enable icache in SPL"
	depends on SPL
	default SYS_ICACHE_OFF
	help
	  Do not enable instruction cache in SPL.

config SYS_DCACHE_OFF
	bool "Do not enable dcache"
	help
	  Do not enable data cache in U-Boot.

config SPL_SYS_DCACHE_OFF
	bool "Do not enable dcache in SPL"
	depends on SPL
	default SYS_DCACHE_OFF
	help
	  Do not enable data cache in SPL.

# board-specific options below
source "board/AndesTech/ax25-ae350/Kconfig"
source "board/emulation/qemu-riscv/Kconfig"
source "board/microchip/mpfs_icicle/Kconfig"
source "board/sifive/unleashed/Kconfig"
source "board/sifive/unmatched/Kconfig"
source "board/openpiton/riscv64/Kconfig"
source "board/sipeed/maix/Kconfig"

# platform-specific options below
source "arch/riscv/cpu/ax25/Kconfig"
source "arch/riscv/cpu/fu540/Kconfig"
source "arch/riscv/cpu/fu740/Kconfig"
source "arch/riscv/cpu/generic/Kconfig"

# architecture-specific options below

choice
	prompt "Base ISA"
	default ARCH_RV32I

config ARCH_RV32I
	bool "RV32I"
	select 32BIT
	help
	  Choose this option to target the RV32I base integer instruction set.

config ARCH_RV64I
	bool "RV64I"
	select 64BIT
	select PHYS_64BIT
	help
	  Choose this option to target the RV64I base integer instruction set.

endchoice

choice
	prompt "Code Model"
	default CMODEL_MEDLOW

config CMODEL_MEDLOW
	bool "medium low code model"
	help
	  U-Boot and its statically defined symbols must lie within a single 2 GiB
	  address range and must lie between absolute addresses -2 GiB and +2 GiB.

config CMODEL_MEDANY
	bool "medium any code model"
	help
	  U-Boot and its statically defined symbols must be within any single 2 GiB
	  address range.

endchoice

choice
	prompt "Run Mode"
	default RISCV_MMODE

config RISCV_MMODE
	bool "Machine"
	help
	  Choose this option to build U-Boot for RISC-V M-Mode.

config RISCV_SMODE
	bool "Supervisor"
	help
	  Choose this option to build U-Boot for RISC-V S-Mode.

endchoice

choice
	prompt "SPL Run Mode"
	default SPL_RISCV_MMODE
	depends on SPL

config SPL_RISCV_MMODE
	bool "Machine"
	help
	  Choose this option to build U-Boot SPL for RISC-V M-Mode.

config SPL_RISCV_SMODE
	bool "Supervisor"
	help
	  Choose this option to build U-Boot SPL for RISC-V S-Mode.

endchoice

config RISCV_ISA_C
	bool "Emit compressed instructions"
	default y
	help
	  Adds "C" to the ISA subsets that the toolchain is allowed to emit
	  when building U-Boot, which results in compressed instructions in the
	  U-Boot binary.

config RISCV_ISA_F
	bool "Standard extension for Single-Precision Floating Point"
	default y
	help
	  Adds "F" to the ISA string passed to the compiler.

config RISCV_ISA_D
	bool "Standard extension for Double-Precision Floating Point"
	depends on RISCV_ISA_F
	default y
	help
	  Adds "D" to the ISA string passed to the compiler and changes the
	  riscv32 ABI from ilp32 to ilp32d and the riscv64 ABI from lp64 to
	  lp64d.

config RISCV_ISA_A
	def_bool y

config 32BIT
	bool

config 64BIT
	bool

config DMA_ADDR_T_64BIT
	bool
	default y if 64BIT

config SIFIVE_CLINT
	bool
	depends on RISCV_MMODE
	help
	  The SiFive CLINT block holds memory-mapped control and status registers
	  associated with software and timer interrupts.

config SPL_SIFIVE_CLINT
	bool
	depends on SPL_RISCV_MMODE
	help
	  The SiFive CLINT block holds memory-mapped control and status registers
	  associated with software and timer interrupts.

config SIFIVE_CACHE
	bool
	help
	  This enables the operations to configure SiFive cache

config ANDES_PLICSW
	bool
	depends on RISCV_MMODE || SPL_RISCV_MMODE
	select REGMAP
	select SYSCON
	select SPL_REGMAP if SPL
	select SPL_SYSCON if SPL
	help
	  The Andes PLICSW block holds memory-mapped claim and pending
	  registers associated with software interrupt.

config SMP
	bool "Symmetric Multi-Processing"
	depends on SBI_V01 || !RISCV_SMODE
	help
	  This enables support for systems with more than one CPU. If
	  you say N here, U-Boot will run on single and multiprocessor
	  machines, but will use only one CPU of a multiprocessor
	  machine. If you say Y here, U-Boot will run on many, but not
	  all, single processor machines.

config SPL_SMP
	bool "Symmetric Multi-Processing in SPL"
	depends on SPL && SPL_RISCV_MMODE
	default y
	help
	  This enables support for systems with more than one CPU in SPL.
	  If you say N here, U-Boot SPL will run on single and multiprocessor
	  machines, but will use only one CPU of a multiprocessor
	  machine. If you say Y here, U-Boot SPL will run on many, but not
	  all, single processor machines.

config NR_CPUS
	int "Maximum number of CPUs (2-32)"
	range 2 32
	depends on SMP || SPL_SMP
	default 8
	help
	  On multiprocessor machines, U-Boot sets up a stack for each CPU.
	  Stack memory is pre-allocated. U-Boot must therefore know the
	  maximum number of CPUs that may be present.

config SBI
	bool
	default y if RISCV_SMODE || SPL_RISCV_SMODE

choice
	prompt "SBI support"
	default SBI_V02

config SBI_V01
	bool "SBI v0.1 support"
	depends on SBI
	help
	  This config allows kernel to use SBI v0.1 APIs. This will be
	  deprecated in future once legacy M-mode software are no longer in use.

config SBI_V02
	bool "SBI v0.2 or later support"
	depends on SBI
	help
	  The SBI specification introduced the concept of extensions in version
	  v0.2. With this configuration option U-Boot can detect and use SBI
	  extensions. With the HSM extension introduced in SBI 0.2, only a
	  single hart needs to boot and enter the operating system. The booting
	  hart can bring up secondary harts one by one afterwards.

	  Choose this option if OpenSBI release v0.7 or above is used together
	  with U-Boot.

endchoice

config SBI_IPI
	bool
	depends on SBI
	default y if RISCV_SMODE || SPL_RISCV_SMODE
	depends on SMP

config XIP
	bool "XIP mode"
	help
	  XIP (eXecute In Place) is a method for executing code directly
	  from a NOR flash memory without copying the code to ram.
	  Say yes here if U-Boot boots from flash directly.

config SPL_XIP
	bool "Enable XIP mode for SPL"
	help
	  If SPL starts in read-only memory (XIP for example) then we shouldn't
	  rely on lock variables (for example hart_lottery and available_harts_lock),
	  this affects only SPL, other stages should proceed as non-XIP.

config AVAILABLE_HARTS
	bool "Send IPI by available harts"
	default y
	help
	  By default, IPI sending mechanism will depend on available_harts.
	  If disable this, it will send IPI by CPUs node numbers of device tree.

config SHOW_REGS
	bool "Show registers on unhandled exception"

config RISCV_PRIV_1_9
	bool "Use version 1.9 of the RISC-V priviledged specification"
	help
	  Older versions of the RISC-V priviledged specification had
	  separate counter enable CSRs for each privilege mode. Writing
	  to the unified mcounteren CSR on a processor implementing the
	  old specification will result in an illegal instruction
	  exception. In addition to counter CSR changes, the way virtual
	  memory is configured was also changed.

config STACK_SIZE_SHIFT
	int
	default 14

config OF_BOARD_FIXUP
	default y if OF_SEPARATE && RISCV_SMODE

menu "Use assembly optimized implementation of memory routines"

config USE_ARCH_MEMCPY
	bool "Use an assembly optimized implementation of memcpy"
	default y
	help
	  Enable the generation of an optimized version of memcpy.
	  Such an implementation may be faster under some conditions
	  but may increase the binary size.

config SPL_USE_ARCH_MEMCPY
	bool "Use an assembly optimized implementation of memcpy for SPL"
	default y if USE_ARCH_MEMCPY
	depends on SPL
	help
	  Enable the generation of an optimized version of memcpy.
	  Such an implementation may be faster under some conditions
	  but may increase the binary size.

config TPL_USE_ARCH_MEMCPY
	bool "Use an assembly optimized implementation of memcpy for TPL"
	default y if USE_ARCH_MEMCPY
	depends on TPL
	help
	  Enable the generation of an optimized version of memcpy.
	  Such an implementation may be faster under some conditions
	  but may increase the binary size.

config USE_ARCH_MEMMOVE
	bool "Use an assembly optimized implementation of memmove"
	default y
	help
	  Enable the generation of an optimized version of memmove.
	  Such an implementation may be faster under some conditions
	  but may increase the binary size.

config SPL_USE_ARCH_MEMMOVE
	bool "Use an assembly optimized implementation of memmove for SPL"
	default y if USE_ARCH_MEMCPY
	depends on SPL
	help
	  Enable the generation of an optimized version of memmove.
	  Such an implementation may be faster under some conditions
	  but may increase the binary size.

config TPL_USE_ARCH_MEMMOVE
	bool "Use an assembly optimized implementation of memmove for TPL"
	default y if USE_ARCH_MEMCPY
	depends on TPL
	help
	  Enable the generation of an optimized version of memmove.
	  Such an implementation may be faster under some conditions
	  but may increase the binary size.

config USE_ARCH_MEMSET
	bool "Use an assembly optimized implementation of memset"
	default y
	help
	  Enable the generation of an optimized version of memset.
	  Such an implementation may be faster under some conditions
	  but may increase the binary size.

config SPL_USE_ARCH_MEMSET
	bool "Use an assembly optimized implementation of memset for SPL"
	default y if USE_ARCH_MEMSET
	depends on SPL
	help
	  Enable the generation of an optimized version of memset.
	  Such an implementation may be faster under some conditions
	  but may increase the binary size.

config TPL_USE_ARCH_MEMSET
	bool "Use an assembly optimized implementation of memset for TPL"
	default y if USE_ARCH_MEMSET
	depends on TPL
	help
	  Enable the generation of an optimized version of memset.
	  Such an implementation may be faster under some conditions
	  but may increase the binary size.

endmenu

endmenu