On 11 August 2018 at 10:08, Steffen Görtz <cont...@steffen-goertz.de> wrote: > The base address determines a peripherals id, which identifies its > interrupt line, see NRF51 reference manual section 10 peripheral > interface. This little gem calculates the peripheral id based > on its base address. > > Signed-off-by: Steffen Görtz <cont...@steffen-goertz.de> > --- > hw/arm/nrf51_soc.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/hw/arm/nrf51_soc.c b/hw/arm/nrf51_soc.c > index 9f9649c780..441d05e1ef 100644 > --- a/hw/arm/nrf51_soc.c > +++ b/hw/arm/nrf51_soc.c > @@ -38,6 +38,9 @@ > #define NRF51822_FLASH_SIZE (256 * 1024) > #define NRF51822_SRAM_SIZE (16 * 1024) > > +/* IRQ lines can be derived from peripheral base addresses */ > +#define BASE_TO_IRQ(base) (((base) >> 12) & 0x1F) > +
You could also have macros for getting the base address from the peripheral ID and the IRQ line from the peripheral ID, but this is fine too. Reviewed-by: Peter Maydell <peter.mayd...@linaro.org> thanks -- PMM
