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_FU540 bool "Support SiFive FU540 Board" config TARGET_SIPEED_MAIX bool "Support Sipeed Maix Board" endchoice config SYS_ICACHE_OFF bool "Do not enable icache" default n 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" default n 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/fu540/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/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_A def_bool y config 32BIT bool config 64BIT bool config SIFIVE_CLINT bool depends on RISCV_MMODE || SPL_RISCV_MMODE select REGMAP select SYSCON select SPL_REGMAP if SPL select SPL_SYSCON if SPL help The SiFive CLINT block holds memory-mapped control and status registers associated with software and timer interrupts. config ANDES_PLIC 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 PLIC block holds memory-mapped claim and pending registers associated with software interrupt. config ANDES_PLMT bool depends on RISCV_MMODE || SPL_RISCV_MMODE help The Andes PLMT block holds memory-mapped mtime register associated with timer tick. config SYS_MALLOC_F_LEN default 0x1000 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 support" depends on SBI help This config allows kernel to use SBI v0.2 APIs. SBI v0.2 is more scalable and extendable to handle future needs for RISC-V supervisor interfaces. For example, with SBI v0.2 HSM extension, only a single hart need to boot and enter operating system. The booting hart can bring up secondary harts one by one afterwards. Choose this option if OpenSBI v0.7 or above release 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 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 endmenu