Struct IsolatedNonvolatileStorage

pub struct IsolatedNonvolatileStorage<'a, const APP_REGION_SIZE: usize> { /* private fields */ }

Implementations

impl<'a, const APP_REGION_SIZE: usize> IsolatedNonvolatileStorage<'a, APP_REGION_SIZE>

pub fn new( driver: &'a dyn NonvolatileStorage<'a>, grant: Grant<App, UpcallCount<{ upcall::COUNT }>, AllowRoCount<{ ro_allow::COUNT }>, AllowRwCount<{ rw_allow::COUNT }>>, userspace_start_address: usize, userspace_length: usize, buffer: &'static mut [u8], ) -> Self

Trait Implementations

impl<const APP_REGION_SIZE: usize> NonvolatileStorageClient for IsolatedNonvolatileStorage<'_, APP_REGION_SIZE>

This is the callback client for the underlying physical storage driver.

fn read_done(&self, buffer: &'static mut [u8], length: usize)

read_done is called when the implementor is finished reading in to the buffer. The callback returns the buffer and the number of bytes that were actually read.

fn write_done(&self, buffer: &'static mut [u8], length: usize)

write_done is called when the implementor is finished writing from the buffer. The callback returns the buffer and the number of bytes that were actually written.

impl<const APP_REGION_SIZE: usize> SyscallDriver for IsolatedNonvolatileStorage<'_, APP_REGION_SIZE>

Provide an interface for userland.

fn command( &self, command_num: usize, offset_lo: usize, offset_hi: usize, processid: ProcessId, ) -> CommandReturn

Command interface.

Commands are selected by the lowest 8 bits of the first argument.

command_num

• 0: Return Ok(()) if this driver is included on the platform.
• 1: Return the number of bytes available to each app.
• 2: Start a read from the nonvolatile storage.
• 3: Start a write to the nonvolatile_storage.

fn allocate_grant(&self, processid: ProcessId) -> Result<(), Error>

Request to allocate a capsule’s grant for a specific process.

fn allow_userspace_readable( &self, app: ProcessId, which: usize, slice: ReadWriteProcessBuffer, ) -> Result<ReadWriteProcessBuffer, (ReadWriteProcessBuffer, ErrorCode)>

System call for a process to pass a buffer (a UserspaceReadableProcessBuffer) to the kernel that the kernel can either read or write. The kernel calls this method only after it checks that the entire buffer is within memory the process can both read and write.