Hi Kautuk, On Sat, Dec 3, 2022 at 12:28 PM Bin Meng <bmeng...@gmail.com> wrote: > > 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
It turns out your instructions missed "-semihosting" in the QEMU command line. With that I can see U-Boot boots with the serial_semihosting driver. > >> >> > >> >> 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
