Struct CycleCount

pub struct CycleCount<'a, P: CycleCounter> { /* private fields */ }

Implementations

impl<'a, P: CycleCounter> CycleCount<'a, P>

pub fn new( counters: &'a P, grant: Grant<App, UpcallCount<0>, AllowRoCount<0>, AllowRwCount<0>>, ) -> Self

Trait Implementations

impl<P: CycleCounter> SyscallDriver for CycleCount<'_, P>

fn command( &self, command_num: usize, _data: usize, _: usize, processid: ProcessId, ) -> CommandReturn

Control the CycleCount system.

command_num

• 0: Driver check.
• 1: Start the cycle counter.
• 2: Get current cycle count.
• 3: Reset and stop the cycle counter.
• 4: Stop the cycle counter.

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.