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Author SHA1 Message Date
Sean Cross
11994d325b kernel: test: add test for server_client_same_process 
This is part of `multiple_contexts`, but it's nice to have an explicit
test for this functionality.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-16 10:22:26 +08:00
Sean Cross
1216963d24 rename contexts -> threads and spawn -> create 
This ensures we're more consistent in naming for these constructs.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-16 10:17:46 +08:00
Sean Cross
ba7bb29ce2 kernel: don't block on full queue for Scalar/Move msgs 
For Scalar and Move messages, the client does not need to block if the
server does not have any waiting messages. In this case, send an `Ok`
response.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-16 10:16:42 +08:00
Sean Cross
506d01fe4a kernel: test: use server_address() to create fn as_process() 
This allows us to spawn a new process and set the server address
transparently.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-16 10:04:50 +08:00
Sean Cross
fb32aab691 kernel: testing: move memory profiling into its own test 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-15 21:24:18 +08:00
Sean Cross
bf15ac08f4 kernel: tests: add memory measurement to test suite 
This adds a feature to enable memory measurement, so we can determine if
we're leaking memory anywhere.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-15 17:08:05 +08:00
Sean Cross
e652150c6e kernel: get multiple message passing working 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-15 16:09:42 +08:00
Sean Cross
0ffbaa369a kernel: fix remaining warnings 
This just silences them, which isn't great in the long run.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-14 15:16:51 +08:00
Sean Cross
b93abcc926 kernel: test: implement mutable borrow 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-14 15:10:25 +08:00
Sean Cross
d7006e675e kernel: get send_borrow_message test working 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-14 12:11:57 +08:00
Sean Cross
964b6e0f46 kernel: disable more debug prints 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-14 10:08:49 +08:00
Sean Cross
05d1cf71dc port: use kernel-assigned port number for tests 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-13 19:57:30 +08:00
Sean Cross
b388d2e1f4 kernel: use SocketAddr instead of &str 
This is easier to copy around and seems to be more informative.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-13 19:45:29 +08:00
Sean Cross
8f74159674 rename ImmutableBorrow -> Borrow 
THis is more in-line with Rust conventions.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-13 19:19:25 +08:00
Sean Cross
85c719643a kernel: tests: factor out common connect code 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-13 19:15:51 +08:00
Sean Cross
05ccba9450 kernel: implement move test 
We can now `Move` memory from one "process" to another.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-13 18:31:51 +08:00
Sean Cross
40ed6365e2 first memory message works 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-13 17:41:50 +08:00
Sean Cross
acf9b049f7 hosted: start working on memory-based message passing 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-12 11:18:26 +08:00
Sean Cross
e1a92e929c kernel: replace more unimplemented!() with UnhandledSyscall 
This should prevent pacnics when calling unhandled functions.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-07-04 11:58:18 +08:00
Sean Cross
acfe8e5076 kernel: fix pid termination 
Previously, we were recycling PIDs when devices disconnected, however we
weren't cleaning up PIDs within the system-level table.

This now cleans up these entries.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-06-25 18:15:36 +08:00
Sean Cross
9f1b1e7ec8 kernel: tests: get both tests working 
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>
 2020-06-25 17:41:17 +08:00
Sean Cross
54a0db50b3 kernel: start using tls 
This allows us to run multiple kernels in parallel.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-06-24 17:51:31 +08:00
Sean Cross
abcba48a2a kernel: add tests 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-06-24 12:29:04 +08:00
Sean Cross
04faa898c7 hosted: cutting down on println messages 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-06-23 16:40:51 +08:00
Sean Cross
cbd8ec3a30 test: get message passing working 
We are now able to pass messages around as part of a test.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-06-23 15:47:18 +08:00
Sean Cross
e9469991be test: get initial test passing 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-06-23 14:42:01 +08:00
Sean Cross
b1a41978ba shutdown: add shutdown syscall 
This will be used during testing to shutdown the kernel once it's
finished.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-06-23 13:58:15 +08:00
Sean Cross
14bb1ac1e5 kernel: working on getting process termination functioning 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-06-22 17:42:24 +08:00
Sean Cross
9361055aec kernel: work-in-progress for process termination 
Processes can go away. This is initial work to support process
termination.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-06-18 11:39:46 +08:00
Sean Cross
2786ad697b kernel: get scalar message passing working again 
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>
 2020-06-16 16:34:49 +08:00
Sean Cross
723529ba20 wip: working on getting message passing working 
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>
 2020-06-15 18:13:10 +08:00
Sean Cross
21c46de60e kernel: move to allow hosted init 
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>
 2020-06-03 18:28:22 +08:00
Sean Cross
17ae34a1c1 kernel: begin actor refactor 
This refactors the kernel so that it *can* run on baremetal, but it can
also run as part of a full system.

This will aid in developing, and ensure that a minimum amount of unsafe
code is present within the kernel.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-06-03 15:34:55 +08:00
Sean Cross
d4db20e516 kernel: add preemptive multitasking 
This is still a work in progress, but we now can have multiple processes
running at once.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-04-06 15:52:07 +08:00
Sean Cross
a1c88b4ffd kernel: remove old code at top of syscall::handle 
This was pseudocode from back before we had a better idea of how
everything would be laid out.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-04-06 10:44:41 +08:00
Sean Cross
1f478925ce kernel: return context on failure 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-04-06 10:43:26 +08:00
Sean Cross
fd5cc8a1f0 kernel: implement mutable borrows 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-04-03 14:23:49 +08:00
Sean Cross
48717d3870 kernel: return a MessageResult after sending a message 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-04-03 14:23:15 +08:00
Sean Cross
9c5cb3da32 kernel: properly share pages between processes 
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>
 2020-04-03 12:28:44 +08:00
Sean Cross
ed977fd564 kernel: initial work to support lending pages 
This lays groundwork to support lending pages from one process to
another, and to restore permissions when pages are handed back.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-04-02 17:40:14 +08:00
Sean Cross
bedb499edb kernel: get immutable borrows working 
We can now pass memory immutably between processes

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-04-01 17:27:59 +08:00
Sean Cross
d6f985c141 syscall: add call to return memory from a message 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-04-01 13:21:23 +08:00
Sean Cross
bdb8eac9ad MemoryRange: move to using this struct for memory ranges 
This is a combination of MemoryAddress and MemorySize.  This is
guaranteed to be not null.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-04-01 10:28:36 +08:00
Sean Cross
a947d7fd79 kernel: clean up most warnings 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-31 18:37:19 +08:00
Sean Cross
b61f1518d0 kernel: syscall: implement UnmapMemory 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-31 18:37:08 +08:00
Sean Cross
abce9eb0c1 message::move: implement movable messages 
This is the first implementation of message passing with moving memory.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-31 18:03:19 +08:00
Sean Cross
8c3f931445 messaging: first message passing example 
THis commit allows us to pass Scalar messages between processes.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-30 16:07:58 +08:00
Sean Cross
f56b5e969d server: use CtxID type instead of usize 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-30 12:35:50 +08:00
Sean Cross
9367905e6f kernel: services: don't resume sleeping processes after irq 
After an IRQ occurs, check to see if there are any available threads.
If there are none, put the process back to sleep.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-27 17:05:37 +08:00
Sean Cross
263e57d4aa kernel: disable lots of debug output 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-27 16:59:46 +08:00
Sean Cross
6b729d9ebc kernel: services: resume correct context after interrupt 
We were resuming the wrong context after returning from an interrupt.
This resulted in us resuming context 3 more often than not.

This now properly banks the current process context prior to the switch.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-27 16:58:04 +08:00
Sean Cross
da2036a182 kernel: services: minor documentation improvements 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-27 16:22:17 +08:00
Sean Cross
cfe7c4a3bc kernel: irq: take() previous process pair 
This prevents us from continuously resuming the same task

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-27 16:21:46 +08:00
Sean Cross
beea92ddab kernel: fix context id assignment 
previously, we were assigning the trap context as a valid ID.  This is
not valid, and causes many problems.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-27 15:58:59 +08:00
Sean Cross
dafec2bb89 kernel: make contexts first-class 
Due to an initial misunderstanding of how the RISC-V is architected,
contexts were going to be an emergent property of the kernel.

However, after further consideration, contexts must now be baked into
the kernel.  Switching between contexts can be handled by the scheduler,
but the kernel must keep track of processor registers.

Keep track of context IDs and ensure they are sane.  With this patch,
interrupts work, as does basic context switching.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-27 12:30:29 +08:00
Sean Cross
2ba9f69015 kernel: fix build error in main.rs 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-25 14:09:17 +08:00
Sean Cross
a723fb6a02 kernel: reflow multiple files' comments 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-25 14:07:46 +08:00
Sean Cross
fa22d9bad8 kernel: fix isr context handling 
We were loading both the context and the banked context, which resulted
in an invalid context being selected.  This caused a cascading failure.

Load only the lower halfword in order to correctly enter the interrupt
context.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-24 15:24:19 +08:00
Sean Cross
fb01359821 server: fix Connect() call 
This fixes the index in the Connect() call, so that clients can now
Connect to servers that exist.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-24 14:52:25 +08:00
Sean Cross
e298f125c9 kernel: rework server structures 
They are now inverted and mvoed into their own file.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-24 14:13:11 +08:00
Sean Cross
484e21fd30 messaging: more work on transferring messages 
Still need to work on passing messages.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-23 16:56:56 +08:00
Sean Cross
569a4196de kernel: return a Result from syscall::handle 
This will simplify error handling.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-23 14:07:54 +08:00
Sean Cross
f32596570f services: don't map messaging region to userspace 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-23 12:59:48 +08:00
Sean Cross
fb69426f28 kernel: riscv: print "SYSTEM HALT" when halting system 
This minor patch helps me remember that these errors are fatal.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-23 12:59:09 +08:00
Sean Cross
0be1b8b94c kernel: mem: don't unilaterally hand memory to userspace 
If it's needed for use in the kernel, don't hand it over.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-23 12:58:13 +08:00
Sean Cross
a31c4722fa kernel: add space for message reply pointer 
With this, we now have enough space to store the return context
information for when `message_reply()` is called.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-23 09:10:19 +08:00
Sean Cross
33162a1c1f services: implement basics of ReceiveMessage 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-20 17:21:34 +08:00
Sean Cross
ae473b5aa7 kernel: broken commit: add server message polling 
This [broken] commit starts to add message polling to the kernel, so a
server can use the MessageReceive call.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-19 17:25:12 +08:00
Sean Cross
04eb18e2fb kernel: add Connect stub 
It doesn't respond, but it prints a message now at least.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-19 08:54:52 +08:00
Sean Cross
ebe3efc097 kernel: properly zero out pages prior to handing them to userspace 
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>
 2020-03-17 11:35:38 +08:00
Sean Cross
85522602ea kernel: silence warnings and remove excess prints 
These prints were used to debug errors in the new process switching
architecture.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-16 19:03:10 +08:00
Sean Cross
022bedc8e3 kernel: refactor processes to support banking 
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>
 2020-03-16 18:22:59 +08:00
Sean Cross
fcdc0da19f kernel: use upstream riscv crate 
Now that this is published upstream, we can remove our dependency on a
particular git version.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-16 08:42:32 +08:00
Sean Cross
99d19866cf kernel: mem: zero out memory as part of alloc() 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-14 22:11:57 +08:00
Sean Cross
db87a94960 kernel: services: add a page for the queue 
Eventually this will be rolled into an existing page.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-14 22:06:22 +08:00
Sean Cross
77c07f0d79 mem: add map_page() 
This shortcut function ensures a page is mapped.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-14 22:06:00 +08:00
Sean Cross
9a10f50ce1 kernel: services: keep track of current pid 
Currently we use the ASID inside the MMU to figure out the current PID.
We should also keep track of what we think it is, for consistency.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-14 21:28:01 +08:00
Sean Cross
845cef3771 kernel: services: add servers to SYSTEM_SERVICES 
This array will be used to keep track of what servers are running.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-14 16:58:15 +08:00
Sean Cross
9508201db9 xous-rs: add claim_interrupt wrapper 
Rather than calling the raw function, add a wrapper for programs to use.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-14 15:41:44 +08:00
Sean Cross
7a3e038e6b syscall: add intial CreateServer call 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-13 22:41:25 +08:00
Sean Cross
c2008e5fe8 syscall: implement map_memory wrapper 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-13 20:33:08 +08:00
Sean Cross
08e416c776 kernel: support omitting virtual address when mapping 
This forms the basis for message passing.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-13 12:44:23 +08:00
Sean Cross
967464df93 kernel: mem: rename last memory address variable 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-13 09:52:53 +08:00
Sean Cross
fb3da7294c mem: turn function comment into rustdoc 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-13 08:32:44 +08:00
Sean Cross
4bb3f6db68 Merge branch 'master' of github.com:betrusted-io/xous-core 2020-03-13 08:30:55 +08:00
Sean Cross
f0d4e44254 kernel: processtable: add "last_default_address" 
This will be used to accelerate allocations for ranges.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-12 17:02:03 +08:00
Sean Cross
87676c0fc5 mem: start implementing find_virtual_address() 
Right now it just returns the address, which is exactly what we had
before.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-12 17:01:40 +08:00
Sean Cross
c1b575507d mem: better handling of memory alloc failures 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-12 16:51:14 +08:00
Sean Cross
36faa8354f riscv: mem: silence warnings when print-debug is disabled 
Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-12 16:50:55 +08:00
Sean Cross
09890a2ca3 riscv: use upstream riscv module 
Still pulling from git, as the version number hasn't been bumped yet.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-11 17:49:03 +08:00
Sean Cross
f50ec67553 initial commit 
This pulls together many disparate repositories into one xous-core
repository.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-03-10 12:13:05 +08:00