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Diffstat (limited to 'riscv/README')
| -rw-r--r-- | riscv/README | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/riscv/README b/riscv/README new file mode 100644 index 0000000..b119c91 --- /dev/null +++ b/riscv/README @@ -0,0 +1,80 @@ + +setup riscv-gnu-toolchain +-------------------------- +$ git clone https://github.com/riscv-collab/riscv-gnu-toolchain +$ ./configure --prefix=/opt/riscv +$ make + + +setup opensbi +-------------- +git clone https://github.com/riscv-software-src/opensbi.git +cd opensbi +make ARCH=riscv CROSS_COMPILE=riscv64-unknown-elf- PLATFORM=generic + + +setup mig +--------- +TARGET_CPPFLAGS=-I"$GNU"/include ../configure --prefix="$GNU" --target=riscv64-unknown-elf TARGET_CC=riscv64-unknown-elf-gcc + +setup gnumach +-------------- +$ mkdir build +$ cd build +$ ../configure --prefix= --host=riscv64-unknown-elf LD=riscv64-unknown-elf-ld CC=riscv64-unknown-elf-gcc +$ make gnumach + +You may need to setup libc6-dev-riscv64-cross + +run it qemu +----------- +qemu-system-riscv64 -M virt -m 128M -nographic -bios YOUR_PATH/opensbi/build/platform/generic/firmware/fw_dynamic.bin -kernel gnumach + + +adjusted for gnumach +--------------------- +linux-6.x.x/arch/riscv/kernel/head.S -> gnumach/riscv/riscv/boothdr.S + +linux-6.x.x/arch/riscv/include/asm/ -> gnumach/riscv/include/asm/ +linux-6.x.x/arch/riscv/include/uapi/ -> gnumach/riscv/include/uapi/ + +You will find in some header files "#include <generated/*>" +This generated directory will be generated after you configure/build linux kernel. + + $ make ARCH=riscv CROSS_COMPILE=riscv64-unknown-linux-gnu- defconfig + +You may need to install "gcc-riscv64-linux-gnu", if "riscv64-unknown-elf" fails to configure/build linux kernel. + +warning: +-------- +This is *not* the directory where all the necessary files will be generated - "linux-6.x.x/arch/riscv/include/generated/" +Instead you need to check - "linux-6.x.x/include/generated/" (specially for files like asm-offsets.h). + +linux-6.x.x/include/generated/ -> gnumach/riscv/include/generated/ + + +links added for asm, uapi, and generated, in gnumach/riscv/configfrag.ac + +AC_CONFIG_LINKS([asm:$systype/include/asm + uapi:$systype/include/uapi + generated:$systype/include/generated]) + + +Pending implementations +----------------------- +gnumach/riscv/riscv/{const.h, setup.c} + + +resources in sifive.com blog +----------------------------- +https://www.sifive.com/blog/all-aboard-part-1-compiler-args +https://www.sifive.com/blog/all-aboard-part-2-relocations +https://www.sifive.com/blog/all-aboard-part-3-linker-relaxation-in-riscv-toolchain +https://www.sifive.com/blog/all-aboard-part-4-risc-v-code-models +https://www.sifive.com/blog/all-aboard-part-5-risc-v-multilib +https://www.sifive.com/blog/all-aboard-part-6-booting-a-risc-v-linux-kernel +https://www.sifive.com/blog/all-aboard-part-7-entering-and-exiting-the-linux-kernel-on-risc-v +https://www.sifive.com/blog/all-aboard-part-8-the-risc-v-linux-port-is-upstream +https://www.sifive.com/blog/all-aboard-part-9-paging-and-mmu-in-risc-v-linux-kernel +https://www.sifive.com/blog/all-aboard-part-10-how-to-contribute-to-the-risc-v-software-ecosystem +https://www.sifive.com/blog/all-aboard-part-11-risc-v-hackathon-presented-by-sifive |