On Tue, Nov 29, 2022 at 2:58 PM Kautuk Consul <kcon...@ventanamicro.com> wrote: > > I have tested it both on Qemu and Ventana's internal simulator.
How to verify this? I used your instructions and U-Boot says: No match for driver 'serial_semihosting' U-Boot 2023.01-rc2-00113-g2a4accaf5e (Dec 03 2022 - 12:20:20 +0800) CPU: rv64imafdch_zicsr_zifencei_zihintpause_zba_zbb_zbc_zbs_sstc Model: riscv-virtio,qemu DRAM: 256 MiB No match for driver 'serial_semihosting' Some drivers were not found Core: 25 devices, 12 uclasses, devicetree: board Flash: 32 MiB Loading Environment from nowhere... OK In: serial@10000000 Out: serial@10000000 Err: serial@10000000 Net: No ethernet found. Working FDT set to 8f734950 Hit any key to stop autoboot: 0 => > > On Tue, Nov 29, 2022 at 12:06 PM Bin Meng <bmeng...@gmail.com> wrote: >> >> Hi Kautuk, >> >> On Tue, Nov 29, 2022 at 2:29 PM Kautuk Consul <kcon...@ventanamicro.com> >> wrote: >> > >> > Hi, >> > >> > Can someone pick this patchset up ? >> > >> > It has been reviewed and there has been no comment on this in recent days. >> > >> > Thanks. >> > >> > On Fri, Sep 23, 2022 at 12:33 PM Kautuk Consul <kcon...@ventanamicro.com> >> > wrote: >> >> >> >> 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 v4: >> >> - Check arch dependencies for SEMIHOSTING as well as SPL_SEMIHOSTING >> >> config options as per Sean's comment. >> >> - arch/riscv/lib/interrupts.c: Check for post and pre instructions >> >> of the ebreak statement whether they are as per the RISCV >> >> semihosting specification. Only then do a disable_semihosting >> >> and epc += 4 and return. >> >> >> >> 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 >> >> >> >> 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 >> >> >> >> Do you have instructions on how to actually test semihosting? Does it >> require a JTAG debugger? But I see you are using QEMU? >> Regards, Bin
