diff options
Diffstat (limited to 'gitlab/issues_toml/target_missing/host_missing/accel_missing/2186.toml')
| -rw-r--r-- | gitlab/issues_toml/target_missing/host_missing/accel_missing/2186.toml | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/gitlab/issues_toml/target_missing/host_missing/accel_missing/2186.toml b/gitlab/issues_toml/target_missing/host_missing/accel_missing/2186.toml new file mode 100644 index 000000000..843dbf12d --- /dev/null +++ b/gitlab/issues_toml/target_missing/host_missing/accel_missing/2186.toml @@ -0,0 +1,44 @@ +id = 2186 +title = "riscv virt pflash0 writes not supported" +state = "closed" +created_at = "2024-02-22T14:53:03.207Z" +closed_at = "2024-02-26T10:17:39.981Z" +labels = [] +url = "https://gitlab.com/qemu-project/qemu/-/issues/2186" +host-os = "Artix Linux" +host-arch = "x86" +qemu-version = "latest master (commit hash: 760b4dcddd)" +guest-os = "- OS/kernel version:" +guest-arch = "## Description of problem" +description = """I am using GDB to debug some Firmware related stuff. At some point in the execution my BIOS/Firmware writes into some global variable (at 0x2000525C) inside the .bss section which is linked to be inside the memory mapped pflash0. But when I step forward with GDB to the exact location where the store instruction (sw) is executed, QEMU prints the following: +``` +pflash_write: Unimplemented flash cmd sequence (offset 000000000000525c, wcycle 0x0 cmd 0x0 value 0x1) +``` +According to the top of `hw/block/pflash_cfi01.c` Flash writes are supported. I was also under the impression that the flash is memory mapped, but maybe that is not true? I am probably missing something here so it would be nice if someone could point me in the right direction. I would also gladly contribute if there is something missing in the riscv virt target. + +I made a simple program to more easily reproduce this: +``` +.section .text +.global _start +_start: +\tlui a5, 0x20000 +\tli a4, 5 +\tsw a4, 24(a5) + +``` +results in QEMU error msg: +``` +pflash_write: Unimplemented flash cmd sequence (offset 0000000000000018, wcycle 0x0 cmd 0x0 value 0x5) +```""" +reproduce = """1. compile above assembly program like this: +``` +riscv64-unknown-elf-gcc -nostdlib -O0 bios.S +riscv64-unknown-elf-objcopy -O binary a.out +truncate -s 33554432 a.out +``` +2. start QEMU like this: +``` +qemu-system-riscv64 -M virt -bios none -drive if=pflash,format=raw,unit=0,file=a.out -nographic -d unimp +``` +3. notice the error message printed by QEMU""" +additional = "n/a" |