Sorry about that! I assumed everyone would know the option and decided to just upt the ordinary command to show that the semihosting changes don't impact the non-semihosting scenarios.
On Sat, Dec 3, 2022 at 11:32 AM Bin Meng bmeng.cn@gmail.com wrote:
Hi Kautuk,
On Sat, Dec 3, 2022 at 12:28 PM Bin Meng bmeng.cn@gmail.com wrote:
On Tue, Nov 29, 2022 at 2:58 PM Kautuk Consul kconsul@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.cn@gmail.com wrote:
Hi Kautuk,
On Tue, Nov 29, 2022 at 2:29 PM Kautuk Consul <
kconsul@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 <
kconsul@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 asSPL_SEMIHOSTING
config options as per Sean's comment.
arch/riscv/lib/interrupts.c: Check for post and preinstructions
of the ebreak statement whether they are as per the RISCV semihosting specification. Only then do adisable_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