another question. is it possible to measure number of executed instruction between two calls to device read/write functions?
I know there is qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) function, but it requires to assume that icount is used and CPU frequence. thanks, Michael On Tue, Aug 16, 2016 at 5:09 PM, Michael Rolnik <mrol...@gmail.com> wrote: > thanks Peter. > > On Tue, Aug 16, 2016 at 5:07 PM, Peter Maydell <peter.mayd...@linaro.org> > wrote: > >> 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 >> > > > > -- > Best Regards, > Michael Rolnik > -- Best Regards, Michael Rolnik
