Sample Baremetal program with Interrupt

[vijayvithal jahagirdar]

I am extending hw/riscv/virt.c to model some custom hardware.

At some point in the code, I am calling
 qemu_irq_raise(s->irq);

I was expecting this to trigger the corresponding routine in my baremetal program. But the routine was not triggered.

Is there a reference  baremetal program with interrupt for qemu+riscv that I can use as a reference to debug my code??

Is  qemu_irq_raise(s->irq); correct & complete method for raising an Interrupt?

Note: As a part of the debug process, I tried the following:

uint64_t mie_reg;
mie_reg = read_csr(mie);
 mie_reg = mie_reg | 0x0000000000000800;
write_csr(mie, mie_reg);
 mie_reg = read_csr(mie);
printf(" mie_reg after write_csr fun %lx  \n",mie_reg);

I was expecting the print to return 0x800, but it returned 0x00, I am not sure what next steps I should take to debug this.

Regards

Vijay