Struct MappedMmio 

pub struct MappedMmio { /* private fields */ }

Volatile access to one locally mapped MMIO region.

Implementations

impl MappedMmio

pub fn from_region(region: MmioRegion<VmoMemory>) -> Self

Wraps an already-mapped MmioRegion.

pub fn from_vmo(vmo: &Vmo, offset: usize, size: usize) -> Result<Self, Status>

Creates an independent local MMIO mapping by duplicating an existing driver MMIO VMO handle (zx::Rights::SAME_RIGHTS) and mapping it into the current driver host process address space (Spec Phase 2 Section 2.1).

Preserves the VMO’s existing cache policy so already-mapped VMOs can be mapped a second time without failing on zx_vmo_set_cache_policy.

pub fn len(&self) -> usize

Returns the mapped byte length of the region.

pub fn is_empty(&self) -> bool

Returns whether the mapped region has zero length.

Trait Implementations

impl Debug for MappedMmio

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl MmioBackend for MappedMmio

fn read32(&mut self, offset: u64) -> Result<u32, BackendError>

Performs one volatile 32-bit read at offset bytes from the start of the logical resource.

fn write32(&mut self, offset: u64, value: u32) -> Result<(), BackendError>

Performs one volatile 32-bit write at offset bytes from the start of the logical resource.

fn barrier(&mut self)

Applies a platform MMIO memory barrier.

impl ResourceBackend for MappedMmio

fn read32(&mut self, offset: u64) -> Result<u32, BackendError>

fn write32(&mut self, offset: u64, value: u32) -> Result<(), BackendError>

fn barrier(&mut self)

fn gpio_read(&mut self) -> Result<bool, BackendError>

fn gpio_write(&mut self, _value: bool) -> Result<(), BackendError>

fn i2c_transfer( &mut self, _write_data: &[u8], _read_length: usize, ) -> Result<Vec<u8>, BackendError>

fn spi_transmit(&mut self, _tx_data: &[u8]) -> Result<Vec<u8>, BackendError>

fn clock_enable(&mut self) -> Result<(), BackendError>

fn clock_disable(&mut self) -> Result<(), BackendError>

fn clock_is_enabled(&mut self) -> Result<bool, BackendError>

fn clock_set_rate(&mut self, _hz: u64) -> Result<(), BackendError>

fn clock_query_rate(&mut self, _hz_in: u64) -> Result<u64, BackendError>

fn clock_get_rate(&mut self) -> Result<u64, BackendError>

fn reset_assert(&mut self) -> Result<(), BackendError>

fn reset_deassert(&mut self) -> Result<(), BackendError>

fn reset_toggle(&mut self) -> Result<(), BackendError>

fn reset_status(&mut self) -> Result<bool, BackendError>

fn serial_read(&mut self) -> Result<Vec<u8>, BackendError>

fn serial_write(&mut self, _data: &[u8]) -> Result<(), BackendError>