Cargo appears to cache packages in the workspace when multiple packages
use the same crate. Unfortunately, Xous uses different features
depending on whether it's running in the kernel or in userspace.
Pull the kernel version of "xous" in under a different namespace in
order to force it to use a different build.
Signed-off-by: Sean Cross <sean@xobs.io>
The kernel should run in a `no_std` environment, which means it must
currently run without `alloc`. We have our own allocation methods when
running on baremetal hardware.
Begin the work to break out the allocation method so that it will work
on both desktop and baremetal environments.
Signed-off-by: Sean Cross <sean@xobs.io>
We now have two tests. These tests may be run either in parallel or in series.
If they are run in parallel, then they will each have their own thread
local storage, and each will initialize things from scratch.
If they are run in series, then the thread local storage will be reused
between the two processes.
Signed-off-by: Sean Cross <sean@xobs.io>
This gets basic scalar message passing working again. With this, the
following operations may be performed:
* Starting a server
* Connecting to a server
* Sending a scalar message
Care must be taken to not overflow a server's queue, particularly if
writers are faster than readers.
Signed-off-by: Sean Cross <sean@xobs.io>
The goal is to get a basic message passing engine working that will also
function as a device that works on real hardware.
This is still reworking it to function correctly on a desktop system.
Once that is working, it will be reworked to function once again on
hardware.
Signed-off-by: Sean Cross <sean@xobs.io>
This prepares for new calls to init SystemServices and the MemoryManager
so that they can be initialized with something other than a
KernelArguments struct.
Signed-off-by: Sean Cross <sean@xobs.io>
This improves page sharing. Permissions are retained during sharing,
and we should now be able to share multiple pages. Additionally, this
lays the groundwork for mutable sharing.
Signed-off-by: Sean Cross <sean@xobs.io>
Until now, we were relying on luck to ensure pages were zeroed.
However, now we properly zero pages in the kernel before handing them
off to userspace.
Signed-off-by: Sean Cross <sean@xobs.io>
We now have a concept of context banking. When an interrupt fires, the
process context is banked.
As part of this, process-level data is now stored in the page within the
process itself. This reduces memory consumption and allows us to have
features such as a hash within each process itself.
Signed-off-by: Sean Cross <sean@xobs.io>
