On 16 August 2016 at 14:53, Michael Rolnik <mrol...@gmail.com> wrote: > 1. How to implement a device that has 4 registers in IO space e.g. AVR > EEPROM?
Since for your AVR target the IO space is just turned into accesses to physical memory, ie the inb/outb default case does something like this: + cpu_physical_memory_read(PHYS_BASE_REGS + port + + AVR_CPU_IO_REGS_BASE, &data, 1); you don't need to do anything special for the device being in IO space. You just need to implement a device which has a MemoryRegion which handles its 4 registers, and then have the board or SoC create that device and map it into the memory space at the right address. hw/misc/zynq_slcr.c is perhaps one example of a device that's just some simple registers (though it has a lot more than 4, the principles are the same). > 2. what is a SoC container object? How? An "SoC container" is a device which doesn't have any interesting functionality itself, but just creates a lot of other devices and maps them to the right places in the address space. A good example is hw/arm/fsl-imx6.c. thanks -- PMM
