9b3d52b400
This enables a riscv64 system to be built with a Buildroot generated toolchain (gcc >= 7.x, binutils >= 2.30, glibc only). This configuration has been used to successfully build a qemu-bootable riscv-linux-4.15 kernel (https://github.com/riscv/riscv-linux.git). Signed-off-by: Mark Corbin <mark.corbin@embecosm.com> [Thomas: - simplify arch.mk.riscv by directly setting GCC_TARGET_ARCH - simplify glibc.mk changes by using GLIBC_CONF_ENV.] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
103 lines
1.9 KiB
Plaintext
103 lines
1.9 KiB
Plaintext
# RISC-V CPU ISA extensions.
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config BR2_RISCV_ISA_RVI
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bool
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config BR2_RISCV_ISA_RVM
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bool
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config BR2_RISCV_ISA_RVA
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bool
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config BR2_RISCV_ISA_RVF
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bool
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config BR2_RISCV_ISA_RVD
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bool
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config BR2_RISCV_ISA_RVC
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bool
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choice
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prompt "Target Architecture Variant"
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default BR2_riscv_g
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config BR2_riscv_g
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bool "General purpose (G)"
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select BR2_RISCV_ISA_RVI
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select BR2_RISCV_ISA_RVM
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select BR2_RISCV_ISA_RVA
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select BR2_RISCV_ISA_RVF
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select BR2_RISCV_ISA_RVD
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help
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General purpose (G) is equivalent to IMAFD.
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config BR2_riscv_custom
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bool "Custom architecture"
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select BR2_RISCV_ISA_RVI
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select BR2_RISCV_ISA_CUSTOM_RVA
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endchoice
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if BR2_riscv_custom
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comment "Instruction Set Extensions"
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config BR2_RISCV_ISA_CUSTOM_RVM
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bool "Integer Multiplication and Division (M)"
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select BR2_RISCV_ISA_RVM
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config BR2_RISCV_ISA_CUSTOM_RVA
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bool "Atomic Instructions (A)"
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select BR2_RISCV_ISA_RVA
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config BR2_RISCV_ISA_CUSTOM_RVF
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bool "Single-precision Floating-point (F)"
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select BR2_RISCV_ISA_RVF
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config BR2_RISCV_ISA_CUSTOM_RVD
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bool "Double-precision Floating-point (D)"
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depends on BR2_RISCV_ISA_RVF
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select BR2_RISCV_ISA_RVD
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config BR2_RISCV_ISA_CUSTOM_RVC
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bool "Compressed Instructions (C)"
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select BR2_RISCV_ISA_RVC
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endif
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config BR2_RISCV_64
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bool
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default y
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select BR2_ARCH_IS_64
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choice
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prompt "Target ABI"
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default BR2_RISCV_ABI_LP64
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config BR2_RISCV_ABI_LP64
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bool "lp64"
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depends on BR2_ARCH_IS_64
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config BR2_RISCV_ABI_LP64F
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bool "lp64f"
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depends on BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVF
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config BR2_RISCV_ABI_LP64D
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bool "lp64d"
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depends on BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVD
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endchoice
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config BR2_ARCH
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default "riscv64" if BR2_ARCH_IS_64
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config BR2_ENDIAN
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default "LITTLE"
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config BR2_GCC_TARGET_ABI
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default "lp64" if BR2_RISCV_ABI_LP64
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default "lp64f" if BR2_RISCV_ABI_LP64F
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default "lp64d" if BR2_RISCV_ABI_LP64D
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config BR2_READELF_ARCH_NAME
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default "RISC-V"
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