Julia Suvorova c4379b4874 nvic: Change NVIC to support ARMv6-M
The differences from ARMv7-M NVIC are:
  * ARMv6-M only supports up to 32 external interrupts
   (configurable feature already). The ICTR is reserved.
  * Active Bit Register is reserved.
  * ARMv6-M supports 4 priority levels against 256 in ARMv7-M.

Signed-off-by: Julia Suvorova <jusual@mail.ru>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-08-14 17:17:19 +01:00
..
2018-06-28 19:05:37 +02:00
2018-02-26 12:55:26 +01:00
2018-07-16 11:18:09 +10:00