Semihosting is a mechanism that enables code running on a target to communicate and use the Input/Output facilities on a host computer that is running a debugger. This patchset adds support for semihosting in u-boot for RISCV64 targets.
CHANGES since v5: - Removed patch 3/3: default enablement of semihosting removed for the qemu-riscv64 targets due to failure of the CI test-cases. This is happening due to the qemu version and some commits currently not taken into qemu latest version. - Added patch 3/3: Added a 3rd patch which adds a dependency on SPL_SEMIHOSTING for the SPL_FS_LOAD_PAYLOAD_NAME config option. This will remove the need for the user to enable any of the SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS config options for SPL_SEMIHOSTING compilations.
Compilation and test commands for SPL and S-mode configurations =================================================================
U-Boot S-mode on QEMU virt ---------------------------- // Compilation of S-mode u-boot ARCH=riscv CROSS_COMPILE=riscv64-unknown-linux-gnu- make qemu-riscv64_smode_defconfig make // Run riscv 64-bit u-boot with opensbi on qemu qemu-system-riscv64 -M virt -m 256M -display none -serial stdio -bios\ opensbi/build/platform/generic/firmware/fw_jump.bin -kernel\ u-boot/u-boot.bin -semihosting-config enable=on
U-Boot SPL on QEMU virt ------------------------ // Compilation of u-boot-spl ARCH=riscv CROSS_COMPILE=riscv64-unknown-linux-gnu- make qemu-riscv64_spl_defconfig make OPENSBI=opensbi/build/platform/generic/firmware/fw_dynamic.bin // Run 64-bit u-boot-spl in qemu qemu-system-riscv64 -M virt -m 256M -display none -serial stdio -bios\ u-boot/spl/u-boot-spl.bin -device\ loader,file=u-boot/u-boot.itb,addr=0x80200000 -semihosting-config enable=on
Kautuk Consul (3): lib: Add common semihosting library arch/riscv: add semihosting support for RISC-V common/spl/Kconfig: add dependency on SPL_SEMIHOSTING for SPL payload
arch/arm/Kconfig | 46 --------- arch/arm/lib/semihosting.c | 181 +--------------------------------- arch/riscv/include/asm/spl.h | 1 + arch/riscv/lib/Makefile | 2 + arch/riscv/lib/interrupts.c | 25 +++++ arch/riscv/lib/semihosting.c | 24 +++++ common/spl/Kconfig | 2 +- include/semihosting.h | 11 +++ lib/Kconfig | 47 +++++++++ lib/Makefile | 2 + lib/semihosting.c | 186 +++++++++++++++++++++++++++++++++++ 11 files changed, 300 insertions(+), 227 deletions(-) create mode 100644 arch/riscv/lib/semihosting.c create mode 100644 lib/semihosting.c