OS23_group1

This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 International License

SOLUTION

Firstly, the device is described in the source file custom_rom.c, while in the header file custom_rom.h there is the declaration of the cration function. In addition, you may add the following changes to the files already present in qemu directory to correctly configure your device:

• hw/misc/Config:

+ config CUSTOM_ROM
+    bool 

• hw/misc/meson.build

+ softmmu_ss.add(when: 'CONFIG_CUSTOM_ROM', if_true: files('custom_rom.c'))

• hw/riscv/Kconfig:

config RISCV_VIRT
    ...
+  select CUSTOM_ROM

• hw/riscv/virt.c:

+  #include "hw/misc/banana_rom.h"

static const MemMapEntry virt_memmap[] = {
    ...
+  [VIRT_CUSTOM_ROM] =  {  0x4000000,       0x100 },
    ...
    }

+ custom_rom_create(memmap[VIRT_CUSTOM_ROM].base);

• include/hw/riscv/virt.h:

enum {
    VIRT_DEBUG,
+   VIRT_CUSTOM_ROM,
      ...
}