Struct DeviceRead 

pub struct DeviceRead<'a, T: Copy, const N: usize> { /* private fields */ }

One-shot DMA-read typestate handle.

While alive, the CPU MUST NOT access the buffer. Drop or DeviceRead::complete returns the buffer to Cpu state with no exit cache op (the device only read RAM; the CPU’s cached copy is unchanged from before the transfer).

Implementations

impl<'a, T: Copy, const N: usize> DeviceRead<'a, T, N>

pub fn dma_addr(&self) -> DmaAddr

DMA bus address of the buffer.

pub fn complete(self) -> Cpu<'a, T, N>

Transition back to Cpu state.

Called by an engine completion handler once the DMA “transfer complete” interrupt or status bit confirms the device has stopped reading. Per DCB-00 §5 transition table, no cache op is emitted — the device only read RAM.