From: Lukas Auer Date: Thu, 22 Nov 2018 10:26:14 +0000 (+0100) Subject: riscv: add Kconfig entries for the C and A ISA extensions X-Git-Tag: v2019.01-rc1~26^2~27 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=d57ffa650f3d3c928d93706dfd282bb1fdecdd31;p=oweals%2Fu-boot.git riscv: add Kconfig entries for the C and A ISA extensions Add Kconfig entries for the C (compressed instructions) and A (atomic instructions) ISA extensions. Only the C ISA extension is selectable. This matches the configuration in Linux. The Kconfig entries are not used yet. A follow-up patch will select the appropriate compiler flags based on the Kconfig configuration. Signed-off-by: Lukas Auer Reviewed-by: Bin Meng --- diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index b81e0d990a..0de77a75d7 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -38,6 +38,17 @@ config ARCH_RV64I 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