Specify kernel API surface about vesper

[berkus]

• IPC
• Cap management
• AS management
• Thread TCB management

[berkus]

Basic IPC is done via syscalls:

• Send
  • send to a capability
• Non-blocking Send
  • non-blocking send to a capability
• Call
  • call a capability (send followed by recv?)
• Recv
  • receive from an endpoint
• Non-blocking Recv
  • receive but don't block if nothing to receive
• Reply
  • send to a one-off reply capability
• Reply-then-Recv
  • send reply atomically followed by a recv

These are performed on capabilities.

• Yield
  • the only non-capabiility syscall that yields cpu slice to the thread with the same or lower priority.

[berkus]

Kernel makes use of the following primitive types:

• Capability Nodes
• Thread Control Blocks
• Low-level interrupt support: IRQControl, IRQHandlers
• Protection domain: Space
• Raw memory: Untyped

[berkus]

    seL4_UntypedObject,
    seL4_TCBObject,
    seL4_EndpointObject,
    seL4_NotificationObject,
    seL4_CapTableObject,

non-arch-specific objects in seL4

[berkus]

Moved https://git.madfire.net/metta-systems/vesper/issues/2