This patchset makes the systick device be banked between security states for ARM v8M.
It is perhaps not the absolute cleanest way to implement this banking, but the alternative (which I had an irc discussion with Paolo about some weeks back) would involve adding a feature to our IOMMU abstraction to allow them to change transaction attributes, refactoring the NVIC so that it exposes memory regions for its S and NS views separately (to be mapped into the CPU's S and NS address spaces by the board code), and then using an IOMMU region to implement the "S alias that behaves like NS" memory region. This version is less than 100 lines by diffstat :-) thanks -- PMM Peter Maydell (2): nvic: Make nvic_sysreg_ns_ops work with any MemoryRegion nvic: Make systick banked include/hw/intc/armv7m_nvic.h | 4 +- hw/intc/armv7m_nvic.c | 91 ++++++++++++++++++++++++++++++++++++------- 2 files changed, 79 insertions(+), 16 deletions(-) -- 2.7.4
