Change Details

Copy-pasted from arm64 with only change that "dsb(sy)" replaced with fence(). RISC-V specifies no cache management instructions so leave cache operations in cpufunc.h as no-op for now

Provide a template for busdma based on arm64 with only change that "dsb(sy)" replaced with fence(). RISC-V specifies no cache management instructions so leave cache operations in cpufunc.h as no-op for now

Copy-pasted fromProvide a template for busdma based on arm64 with only change that "dsb(sy)" replaced with fence(). RISC-V specifies no cache management instructions so leave cache operations in cpufunc.h as no-op for now