This patch series includes general fixes and cleanup for RISC-V. It also adds support for booting Linux on qemu-riscv. At the moment, only single-core systems are supported. Support for multi-core systems will be added with a future patch series.
To boot Linux on qemu-riscv, Linux must be compiled into BBL as a payload. BBL must be included in a FIT image and supplied to QEMU with the -kernel parameter. Its location in memory is embedded in the device tree, which QEMU passes to u-boot. To test this, QEMU and riscv-pk (BBL) must be modified. QEMU is modified to add support for loading binary files (FIT images in this case) in addition to ELF files. riscv-pk must be modified to adjust the link address and to ignore the kernel address from the device tree. A pull request for QEMU, which implements this, is available at [1]. A modified version of riscv-pk is available at [2].
[1]: https://github.com/riscv/riscv-qemu/pull/175 [2]: https://github.com/lukasauer/riscv-pk/tree/riscv-u-boot
Lukas Auer (30): tools: .gitignore: add prelink-riscv riscv: ignore device tree binaries dts: riscv: update makefile to also clean the RISC-V dts directory riscv: rename CPU_RISCV_32/64 to match architecture names ARCH_RV32I/64I riscv: select CONFIG_PHYS_64BIT on RV64I systems riscv: add Kconfig entries for the C and A ISA extensions riscv: set -march and -mabi based on the Kconfig configuration riscv: add Kconfig entries for the code model riscv: move target selection into separate file riscv: enable -fdata-sections riscv: fix use of incorrectly sized variables riscv: make use of the barrier functions from Linux riscv: do not reimplement generic io functions riscv: complete the list of exception codes riscv: treat undefined exception codes as reserved riscv: hang on unhandled exceptions riscv: implement the invalidate_icache_* functions riscv: invalidate the instruction cache before jumping to Linux riscv: fix inconsistent use of spaces and tabs in start.S riscv: align mtvec on a 4-byte boundary riscv: remove CONFIG_INIT_CRITICAL riscv: remove unused labels in start.S riscv: do not blindly modify the mstatus CSR riscv: save hart ID and device tree passed by prior boot stage riscv: qemu: use device tree passed by prior boot stage bdinfo: riscv: print fdt_blob address riscv: qemu: support booting Linux riscv: align bootm implementation with that of other architectures dm: core: add missing prototype for ofnode_read_u64 riscv: qemu: detect and boot the kernel passed by QEMU
arch/riscv/Kconfig | 54 ++-- arch/riscv/Kconfig.board | 14 + arch/riscv/Makefile | 16 ++ arch/riscv/config.mk | 7 +- arch/riscv/cpu/cpu.c | 6 + arch/riscv/cpu/start.S | 339 +++++++++++------------- arch/riscv/dts/.gitignore | 1 + arch/riscv/include/asm/barrier.h | 67 +++++ arch/riscv/include/asm/io.h | 48 +--- arch/riscv/include/asm/posix_types.h | 6 +- arch/riscv/include/asm/types.h | 4 + arch/riscv/lib/bootm.c | 93 +++++-- arch/riscv/lib/cache.c | 10 + arch/riscv/lib/interrupts.c | 31 ++- arch/riscv/lib/setjmp.S | 2 +- board/emulation/qemu-riscv/Kconfig | 1 + board/emulation/qemu-riscv/qemu-riscv.c | 35 ++- cmd/bdinfo.c | 2 + configs/ax25-ae350_defconfig | 2 +- configs/qemu-riscv32_defconfig | 4 +- configs/qemu-riscv64_defconfig | 6 +- dts/Makefile | 2 +- include/config_distro_bootcmd.h | 8 +- include/configs/qemu-riscv.h | 13 + include/dm/ofnode.h | 10 + tools/.gitignore | 1 + 26 files changed, 494 insertions(+), 288 deletions(-) create mode 100644 arch/riscv/Kconfig.board create mode 100644 arch/riscv/dts/.gitignore create mode 100644 arch/riscv/include/asm/barrier.h