This commit also converts our own copyright headers to directly use
SPDX, but leaves all other copyright header intact, only adding the
SPDX ident. As far as possible this commit also merges multiple
Data61 copyright statements/headers into one for consistency.
This changes the budget/remaining fields in scheduling contexts
to contain timer ticks, not number of abstract sel4ticks.
seL4_SchedControl_Configure now takes microseconds, not ticks.
This commit is plat-independant - the platform and arch specific
timer code follows in later commits.
This is the first part of the seL4 MCS. This commit:
* adds a scheduling context object. Threads without scheduling
context objects cannot be scheduled.
* replaces tcbTimeSlice with the scheduling context object
* adds seL4_SchedControl caps for each core
* adds seL4_SchedControl_Configure which allows users to configure
amount of ticks a scheduling context has, and set a core for the
scheduling context.
* adds seL4_SchedContext_Bind, Unbind and UnbindObject, which allows
a tcb to be bound to a scheduling context.
