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arch: add support for RISC-V 64-bit (riscv64) architecture 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>
2018-09-12 04:22:54 -06:00
# RISC-V CPU ISA extensions.
config BR2_RISCV_ISA_RVI
bool
config BR2_RISCV_ISA_RVM
bool
config BR2_RISCV_ISA_RVA
bool
config BR2_RISCV_ISA_RVF
bool
config BR2_RISCV_ISA_RVD
bool
config BR2_RISCV_ISA_RVC
bool
choice
prompt "Target Architecture Variant"
default BR2_riscv_g
config BR2_riscv_g
bool "General purpose (G)"
select BR2_RISCV_ISA_RVI
select BR2_RISCV_ISA_RVM
select BR2_RISCV_ISA_RVA
select BR2_RISCV_ISA_RVF
select BR2_RISCV_ISA_RVD
help
General purpose (G) is equivalent to IMAFD.
config BR2_riscv_custom
bool "Custom architecture"
select BR2_RISCV_ISA_RVI
select BR2_RISCV_ISA_CUSTOM_RVA
endchoice
if BR2_riscv_custom
comment "Instruction Set Extensions"
config BR2_RISCV_ISA_CUSTOM_RVM
bool "Integer Multiplication and Division (M)"
select BR2_RISCV_ISA_RVM
config BR2_RISCV_ISA_CUSTOM_RVA
bool "Atomic Instructions (A)"
select BR2_RISCV_ISA_RVA
config BR2_RISCV_ISA_CUSTOM_RVF
bool "Single-precision Floating-point (F)"
select BR2_RISCV_ISA_RVF
config BR2_RISCV_ISA_CUSTOM_RVD
bool "Double-precision Floating-point (D)"
depends on BR2_RISCV_ISA_RVF
select BR2_RISCV_ISA_RVD
config BR2_RISCV_ISA_CUSTOM_RVC
bool "Compressed Instructions (C)"
select BR2_RISCV_ISA_RVC
endif
arch: add support for RISC-V 32-bit (riscv32) architecture This enables a riscv32 system to be built with a Buildroot generated toolchain (gcc >= 7.x, binutils >= 2.30, glibc only). This requires a custom version of glibc 2.26 from the riscv-glibc repository. Note that there are no tags in this repository, so the glibc version just consists of the 40 character commit id string. Thanks to Fabrice Bellard for pointing me towards the 32-bit glibc repository and for providing the necessary patch to get it to build. Signed-off-by: Mark Corbin <mark.corbin@embecosm.com> Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-10-21 13:12:01 -06:00
choice
prompt "Target Architecture Size"
default BR2_RISCV_64
config BR2_RISCV_32
bool "32-bit"
arch/config: Make RISC-V 64-bits MMU optional Linux supports No-MMU RISC-V 64-bits since kernel version 5.8. Make MMU optional to enable building for RISC-V 64-bits boards that do not have one. MMU use of RISC-V 32-bits builds remains mandatory for now. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2021-10-26 01:17:22 -06:00
select BR2_ARCH_HAS_MMU_MANDATORY
arch: add support for RISC-V 32-bit (riscv32) architecture This enables a riscv32 system to be built with a Buildroot generated toolchain (gcc >= 7.x, binutils >= 2.30, glibc only). This requires a custom version of glibc 2.26 from the riscv-glibc repository. Note that there are no tags in this repository, so the glibc version just consists of the 40 character commit id string. Thanks to Fabrice Bellard for pointing me towards the 32-bit glibc repository and for providing the necessary patch to get it to build. Signed-off-by: Mark Corbin <mark.corbin@embecosm.com> Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-10-21 13:12:01 -06:00
arch: add support for RISC-V 64-bit (riscv64) architecture 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>
2018-09-12 04:22:54 -06:00
config BR2_RISCV_64
arch: add support for RISC-V 32-bit (riscv32) architecture This enables a riscv32 system to be built with a Buildroot generated toolchain (gcc >= 7.x, binutils >= 2.30, glibc only). This requires a custom version of glibc 2.26 from the riscv-glibc repository. Note that there are no tags in this repository, so the glibc version just consists of the 40 character commit id string. Thanks to Fabrice Bellard for pointing me towards the 32-bit glibc repository and for providing the necessary patch to get it to build. Signed-off-by: Mark Corbin <mark.corbin@embecosm.com> Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-10-21 13:12:01 -06:00
bool "64-bit"
arch: add support for RISC-V 64-bit (riscv64) architecture 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>
2018-09-12 04:22:54 -06:00
select BR2_ARCH_IS_64
arch/config: Make RISC-V 64-bits MMU optional Linux supports No-MMU RISC-V 64-bits since kernel version 5.8. Make MMU optional to enable building for RISC-V 64-bits boards that do not have one. MMU use of RISC-V 32-bits builds remains mandatory for now. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2021-10-26 01:17:22 -06:00
select BR2_ARCH_HAS_MMU_OPTIONAL
arch: add support for RISC-V 64-bit (riscv64) architecture 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>
2018-09-12 04:22:54 -06:00
arch: add support for RISC-V 32-bit (riscv32) architecture This enables a riscv32 system to be built with a Buildroot generated toolchain (gcc >= 7.x, binutils >= 2.30, glibc only). This requires a custom version of glibc 2.26 from the riscv-glibc repository. Note that there are no tags in this repository, so the glibc version just consists of the 40 character commit id string. Thanks to Fabrice Bellard for pointing me towards the 32-bit glibc repository and for providing the necessary patch to get it to build. Signed-off-by: Mark Corbin <mark.corbin@embecosm.com> Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-10-21 13:12:01 -06:00
endchoice
arch: add support for RISC-V 64-bit (riscv64) architecture 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>
2018-09-12 04:22:54 -06:00
choice
prompt "Target ABI"
arch/riscv: set the default float ABI based on ISA extensions This patch sets the default floating point ABI based on the ISA extensions that have been selected rather than defaulting to soft float. For 64-bit: ISA 'D' selects lp64d ISA 'F' selects lp64f Otherwise select lp64 For 32-bit: ISA 'D' selects ilp32d ISA 'F' selects ilp32f Otherwise select ilp32 This change was proposed by Palmer Dabbelt at SiFive. Signed-off-by: Mark Corbin <mark.corbin@embecosm.com> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2019-09-19 09:40:35 -06:00
default BR2_RISCV_ABI_ILP32D if !BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVD
default BR2_RISCV_ABI_ILP32F if !BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVF
default BR2_RISCV_ABI_ILP32 if !BR2_ARCH_IS_64
default BR2_RISCV_ABI_LP64D if BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVD
default BR2_RISCV_ABI_LP64F if BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVF
default BR2_RISCV_ABI_LP64 if BR2_ARCH_IS_64
arch: add support for RISC-V 32-bit (riscv32) architecture This enables a riscv32 system to be built with a Buildroot generated toolchain (gcc >= 7.x, binutils >= 2.30, glibc only). This requires a custom version of glibc 2.26 from the riscv-glibc repository. Note that there are no tags in this repository, so the glibc version just consists of the 40 character commit id string. Thanks to Fabrice Bellard for pointing me towards the 32-bit glibc repository and for providing the necessary patch to get it to build. Signed-off-by: Mark Corbin <mark.corbin@embecosm.com> Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-10-21 13:12:01 -06:00
config BR2_RISCV_ABI_ILP32
bool "ilp32"
depends on !BR2_ARCH_IS_64
config BR2_RISCV_ABI_ILP32F
bool "ilp32f"
depends on !BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVF
config BR2_RISCV_ABI_ILP32D
bool "ilp32d"
depends on !BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVD
arch: add support for RISC-V 64-bit (riscv64) architecture 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>
2018-09-12 04:22:54 -06:00
config BR2_RISCV_ABI_LP64
bool "lp64"
depends on BR2_ARCH_IS_64
config BR2_RISCV_ABI_LP64F
bool "lp64f"
depends on BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVF
arch/Config.in.riscv: lp64f ABI is only supported if MMU is enabled Even though that seems weird, the LP64F ABI is only supported when MMU support is enabled. Indeed, as per commit 9a51381cedc16e6d70cb85e1144f6e0fa89af69a ("package/uclibc: prevent config with unsupported RISC-V float ABI"), uClibc does not support LP64F. But uClibc is the only C library that support RISC-V 64-bit noMMU. So the selection of LP64F and !MMU is impossible. Right now this selection causes a build failure as no C library is enabled. This commit fixes this by ensuring we cannot use LP64F when MMU support is not available. Fixes: http://autobuild.buildroot.net/results/6320dcc655f1871eb8bf6a9689bddde7447385f5/ Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2022-07-26 10:39:48 -06:00
depends on BR2_USE_MMU
arch: add support for RISC-V 64-bit (riscv64) architecture 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>
2018-09-12 04:22:54 -06:00
config BR2_RISCV_ABI_LP64D
bool "lp64d"
depends on BR2_ARCH_IS_64 && BR2_RISCV_ISA_RVD
endchoice
config BR2_ARCH
arch: add support for RISC-V 32-bit (riscv32) architecture This enables a riscv32 system to be built with a Buildroot generated toolchain (gcc >= 7.x, binutils >= 2.30, glibc only). This requires a custom version of glibc 2.26 from the riscv-glibc repository. Note that there are no tags in this repository, so the glibc version just consists of the 40 character commit id string. Thanks to Fabrice Bellard for pointing me towards the 32-bit glibc repository and for providing the necessary patch to get it to build. Signed-off-by: Mark Corbin <mark.corbin@embecosm.com> Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-10-21 13:12:01 -06:00
default "riscv32" if !BR2_ARCH_IS_64
arch: add support for RISC-V 64-bit (riscv64) architecture 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>
2018-09-12 04:22:54 -06:00
default "riscv64" if BR2_ARCH_IS_64
core: introduce NORMALIZED_ARCH as non-kernel replacement for KERNEL_ARCH The variable 'KERNEL_ARCH' is actually a normalized version of 'ARCH'/'BR2_ARCH'. For example, 'arcle' and 'arceb' both become 'arc', just as all powerpc variants become 'powerpc'. It is presumably called 'KERNEL_ARCH' because the Linux kernel is typically the first place where support for a new architecture is added, and thus is the entity that defines the normalized name. However, the term 'KERNEL_ARCH' can also be interpreted as 'the architecture used by the kernel', which need not be exactly the same as 'the normalized name for a certain arch'. In particular, for cases where a 64-bit architecture is running a 64-bit kernel but 32-bit userspace. Examples include: * aarch64 architecture, with aarch64 kernel and 32-bit (ARM) userspace * x86_64 architecture, with x86_64 kernel and 32-bit (i386) userspace In such cases, the 'architecture used by the kernel' needs to refer to the 64-bit name (aarch64, x86_64), whereas all userspace applications need to refer the, potentially normalized, 32-bit name. This means that there need to be two different variables: KERNEL_ARCH: the architecture used by the kernel NORMALIZED_ARCH: the normalized name for the current userspace architecture At this moment, both will actually have the same content. But a subsequent patch will add basic support for situations described above, in which KERNEL_ARCH may become overwritten to the 64-bit architecture, while NORMALIZED_ARCH needs to remain the same (32-bit) case. This commit replaces use of KERNEL_ARCH where actually the userspace arch is needed. Places that use KERNEL_ARCH in combination with building of kernel modules are not touched. There may be cases where a package builds both a kernel module as userspace, in which case it may need to know about both KERNEL_ARCH and NORMALIZED_ARCH, for the case where they differ. But this is to be fixed on a per-need basis. Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> Reviewed-by: Romain Naour <romain.naour@gmail.com> [Arnout: Also rename BR2_KERNEL_ARCH to BR2_NORMALIZED_ARCH] Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
2022-01-15 13:03:00 -07:00
config BR2_NORMALIZED_ARCH
arch: move definition of KERNEL_ARCH to Config.in.<arch> files Similar to other arch-specific strings, the 'KERNEL_ARCH' variable can be determined from Config.in.<arch> files. Besides aligning with similar strings, this also means simplification: the big 'sed' covers several architectures not even supported by Buildroot. Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> Reviewed-by: Romain Naour <romain.naour@gmail.com> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
2022-01-15 13:02:59 -07:00
default "riscv"
arch: add support for RISC-V 64-bit (riscv64) architecture 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>
2018-09-12 04:22:54 -06:00
config BR2_ENDIAN
default "LITTLE"
config BR2_GCC_TARGET_ABI
arch: add support for RISC-V 32-bit (riscv32) architecture This enables a riscv32 system to be built with a Buildroot generated toolchain (gcc >= 7.x, binutils >= 2.30, glibc only). This requires a custom version of glibc 2.26 from the riscv-glibc repository. Note that there are no tags in this repository, so the glibc version just consists of the 40 character commit id string. Thanks to Fabrice Bellard for pointing me towards the 32-bit glibc repository and for providing the necessary patch to get it to build. Signed-off-by: Mark Corbin <mark.corbin@embecosm.com> Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-10-21 13:12:01 -06:00
default "ilp32" if BR2_RISCV_ABI_ILP32
default "ilp32f" if BR2_RISCV_ABI_ILP32F
default "ilp32d" if BR2_RISCV_ABI_ILP32D
arch: add support for RISC-V 64-bit (riscv64) architecture 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>
2018-09-12 04:22:54 -06:00
default "lp64" if BR2_RISCV_ABI_LP64
default "lp64f" if BR2_RISCV_ABI_LP64F
default "lp64d" if BR2_RISCV_ABI_LP64D
config BR2_READELF_ARCH_NAME
default "RISC-V"
arch: force syntax colouring to kconfig in Config.in.* It is too sad when an editor picks up the wrong syntax... Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2019-05-03 07:10:17 -06:00
# vim: ft=kconfig
# -*- mode:kconfig; -*-