Do not generate data symbols for enums

With clang 11 these become bss symbols rather than commons, resulting in
multiple definition errors at link time. gcc 10 is likely to expose the
same issue.

Signed-off-by: Stefan O'Rear <sorear@fastmail.com>

replacing all ifndef with pargma once

All the kernel header files now use pargma once rather than the ifndef,
as the pre-processed C files do not change while header files
are protected with pargma once. This will also solve any naming issues
caused by ifndef.

Convert license tags to SPDX identifiers

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.

mcs: add seL4_SchedContext_YieldTo

Implement seL4_SchedContext_YieldTo, which allows users to manipulate
the scheduling queues up to their MCP and can be used for user level
scheduling.

mcs: timeout exceptions

- Add seL4_TCB_SetTimeoutEndpoint
- implement timeout exceptions

mcs: configurable scheduling context size

This allows users to define custom amounts of refills without
increasing the scheduling context size system wide.

also add libsel4 functions for refill size

mcs: associate scheduling context + ntfn

This commit allows scheduling contexts to be bound
to notification objects. When a passive server
receives a notification it will receive the scheduling
context from the notification. When the server
blocks the scheduling context is returned.

mcs: scheduling context donation over ipc

After this commit, threads blocked on an endpoint can recieve a
scheduling context from the thread that wakes the blocked thread.

mcs: add periodic scheduling

This commit adds periodic scheduling with sporadic servers.

mcs: Add a scheduling context object

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.

libsel4: add seL4_VspaceBits

This constant represents the size of the root page table.

More standard constant name, moved ASID constants to arch generic files

Add seL4_UserTop and move kernelBase to the arch level

- seL4_UserTop is a new constant which represents the top of virtual
memory available to user level
- this commit also rationalises several constants (USER_TOP, kernelBase)
and moves them to the arch level, such that ports only need to define
seL4_UserTop.

Increase seL4_TCBBits ready for alignment increase

The alignment of the tcb_t portion of a TCB object is going to be increased, this will
cause the total TCB size to overflow in some cases. This updates the definition of
seL4_TCBBits such that TCBs will be large enough after the alignment change.

Declare and check IPC buffer size

Adds a named constant of the IPC buffer size bits that can be used when checking the
size/alignment of an IPC buffer. This constant has a compile time assertion to ensure
it corresponds to the actual IPC buffer

x86: Increase TCB size for debug builds

Debug builds require one additional byte in the TCB to have a NULL terminated tcb name.

libsel4: fix licenses

- some were incorrectly marked GPL (libsel4 is BSD)
- update NICTA --> DATA61 etc
- fix tags D61 --> DATA61
- update year to 2017

SELFOUR-879: expose index and entry constants

libsel4: Add seL4_FastMessageRegisters

This allows benchmarks and utility code to only set registers in the ipc
buffer as required.

ia32: remove unsued ia32KSGlobalPDPT and PDPT defines

ia32: Support larger XSAVE region sizes

SELFOUR-413: refactor libsel4 fault API

This is a *breaking API change*

This commit:

* makes seL4_Fault_tag_t common between the kernel and libsel4
* deprecates the existing functions from sel4/messages.h includes
* introduces a new fault API in sel4/faults.h and
* sel4/sel4_arch/faults.h
* deprecates seL4_GetTag(), as the function did not work without
the user calling seL4_SetTag() first (seL4_MessageInfo is passed
in registers and not set in the IPC buffer)
* removes previously deprecated functions (deprecated prior to 3.0.0)
* updates the seL4 manual to reflect the changes

Use correct seL4_MaxUntypedBits

This change uses the seL4_MaxUntypedBits constant in decodeUntypedInvocation
when checking the size of the requested allocation. This constant
is also changed to be the correct value. The verification team suspects
this check is probably unnecessary, but have also resolved not to waste more
time investigating.

SELFOUR-287: 32-bit vt-x implementation

This is an implementation of vt-x for x86 kernels running in
ia32 mode.

Defined untyped size ranges in libsel4

SELFOUR-499: X86, ARM: Add userspace invocations for hardware debugging

This commit implements the body of SELFOUR-499. The API exposes the x86 DR0-7
and ARM coprocessor 14 features to userspace by virtualizing them as context-
switched registers in the TCB. Implemented as TCB invocations. This feature is
only built when CONFIG_HARDWARE_DEBUG_API is selected.

* Add low-level support routines for setting, unsetting, getting, enabling
and disabling breakpoints.
* Add support for single-stepping as well.
^ Single-stepping is not supported on ARMv6 since the hardware
doesn't have support.
^ ARM implements single-stepping as instruction breakpoints
configured to fault on every instruction -- this is achieved through
the "mismatch" mode, which is only supported from ARMv7 onwards.
* Also support explicit software break requests, a la "BKPT" and "INT $3".

* New invocations:
* seL4_TCB_SetBreakpoint().
* seL4_TCB_GetBreakpoint().
* seL4_TCB_UnsetBreakpoint().
* seL4_TCB_ConfigureSingleStepping().
* New constants:
^ Event types:
^ seL4_InstructionBreakpoint.
^ seL4_DataBreakpoint.
^ seL4_SoftwareBreakRequest.
^ Access types:
^ seL4_BreakOnRead.
^ seL4_BreakOnWrite.
^ seL4_BreakOnReadWrite.
^ Exports:
^ seL4_NumHWBreakpoints.
^ seL4_NumExclusiveBreakpoints.
^ seL4_NumExclusiveWatchpoints.
^ seL4_NumDualFunctionMonitors.
^ seL4_FirstBreakpoint.
^ seL4_FirstWatchpoint.
^ seL4_FirstDualFunctionMonitor.

See documentation in the seL4 API manual.

x86: Define large frame types

SELFOUR-617: one source of memory object sizes

Adds the following constants to libsel4
and uses them in the kernel.

seL4_SectionSize (arm)
seL4_SuperSectionSize (arm)
seL4_HugePageSize (x86 - pae)
seL4_LargePageSize (arm)
seL4_DataFault
seL4_InstructionFault

SELFOUR-446 Benchmark: Track syscall feature

Benchmark feature that currently:
- Keeps track of system calls info
- Start time
- Duration
- Capability type
- Invocation tag
- Log the number of invocations of each system call*
- Log the number of invocations for each capability type per syscall.
- Has 3 new syscalls (dump, reset, get size).
- This new feature uses the existing log buffer (which is 1MiB for x86
and ARM). Since the number of syscall invocations is not
deterministic, the logged number of invocations is limited by the size
of the buffer. I suggested to enable the users to pass their own
user-level buffer, to enable more flexibility, later.
- ENABLE_BENCHMARKS is now a parent config option of trace points and
system call track features, they can't be used at the same time.

Benchmarks: Add definition of seL4_LogBufferSize to x86

Updates SELFOUR-446

SELFOUR-399: object sizes and globals frame addr should come from the same source

libsel4: Generate libsel4 definitions from the current ARCH as well as the SEL4_ARCH