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Author SHA1 Message Date
Sean Cross
e44eec2334 kernel: fix remaining warnings on hosted mode 
This removes all remaining warnings from hosted mode. Tests pass, and
the system continues to run normally.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-16 15:07:25 +08:00
Sean Cross
5eaa3a41b1 kernel: services: fix warnings on hosted mode 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-16 15:01:07 +08:00
Sean Cross
90d1c7a4b8 kernel: move arch mods into their own dir 
Move `hosted.rs` into `hosted/mod.rs` and `riscv.rs` into
`riscv/mod.rs`.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-16 14:55:38 +08:00
Sean Cross
c59cdfbd51 kernel: rename WouldBlock syscall result 
This reflects the new naming convention, which is clearer.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-16 12:25:39 +08:00
Sean Cross
1b315de830 kernel: make init proces stack grown downwards 
Previously, we were creating a stack beginning at the initial page,
and then growing it upwards. The correct behavior is to begin it at
the top and grow it downwards.

In order to do this, subtract the size of the stack from the initial
pointer.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-15 19:26:11 +08:00
Sean Cross
e29dc5a739 kernel: don't allow allocating exception thread 
This prevents the exception thread from being allocated as a normal
system thread.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-15 19:25:29 +08:00
bunnie
5113df5eec Merge branch 'bunnie-dev' into main 
Use a RefCell to solve the interior mutability issue introduced
by the &mut check introduced on MemoryRanges.
 2021-08-10 18:13:33 +08:00
Sean Cross
fa2a841f8a kernel: fix hosted mode exception support 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 17:51:24 +08:00
Sean Cross
6985fda7ba kernel: get exceptions fully working 
This finishes work with exceptions such that they now actually work.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 17:47:44 +08:00
Sean Cross
9bba083e2e kernel: remove debug print from mem.rs 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 13:05:23 +08:00
Sean Cross
15c9eadc4c kernel: riscv: re-fix mem warnings 
The previous approach did not work, and broke everything. This fixes it
properly.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 13:02:16 +08:00
Sean Cross
b6f706411b kernel: gdb_server: fix clippy warnings 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 12:55:22 +08:00
Sean Cross
68f5e81d3f kernel: riscv: fix warnings in process 
Fix clippy warnings in the `process.rs` file.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 12:54:43 +08:00
Sean Cross
dbd34318ce Revert "kernel: fix remaining clippy warnings" 
This appears to have broken things.

This reverts commit 8b0dd3630c.
 2021-08-06 12:51:40 +08:00
Sean Cross
8b0dd3630c kernel: fix remaining clippy warnings 
This removes all remaining clippy warnings from inside the kernel.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:43:34 +08:00
Sean Cross
0a6a1f2edd kernel: syscall: ignore final Clippy warning 
This warning is due to some debug information that is currently unused.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:39:09 +08:00
Sean Cross
cc8dc49dba kernel: riscv: refactor irqs to support exceptions 
This fixes the exception handler so that it can support user-defined
exceptions. Additionally, kernel mode errors are called out now.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:37:27 +08:00
Sean Cross
19f68edbb4 kernel: riscv: allow exceptions with NULL pc 
When the program counter is NULL, we can still get exceptions. This
happens when we jump to an invalid address, for example.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:34:50 +08:00
Sean Cross
08b787a03e kernel: debug: fix remaining clippy lints 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:34:30 +08:00
Sean Cross
c7ff0ceb21 kernel: mem: fix remaining clippy lints 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:32:52 +08:00
Sean Cross
d27a2eb27e kernel: mem: use iter instead of array access 
This compresses the entirety of the memory range finder into a single
statement. As a result, duplicate code is removed and we can elide more
range checks.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:30:29 +08:00
Sean Cross
9dc4fcbf55 kernel: services: fix all clippy warnings 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:16:29 +08:00
Sean Cross
d4675ef9cf kernel: services: allow unsetting exception handler 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:05:29 +08:00
Sean Cross
5b2ac0df68 kernel: implement SetExceptionHandler routine 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:03:29 +08:00
Sean Cross
76953985fe kernel: fix clippy warnings in mem/server 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:03:12 +08:00
Sean Cross
059fc18850 services: add exception handler routines 
Add a function to set and one to clear the current exception handler.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:02:32 +08:00
Sean Cross
a096509a04 kernel: irq: use iter for IRQ_HANDLERS 
Don't use direct indexing. Instead, use an iterator to go through the
IRQ_HANDLERS array.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:00:42 +08:00
Sean Cross
b98e465d12 kernel: more clippy warning fixes 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-05 16:59:27 +08:00
Sean Cross
759ddfedd6 kernel: add initial cut of exception handling 
Though it is not yet wired up, the exception handler groundwork is laid
here.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-05 16:18:10 +08:00
bunnie
d68b6639cf remove now-unused stub 2021-08-04 23:29:00 +08:00
bunnie
d42658a65d fix kernel debug input 
for whatever reason, by default, uarts in litex are configured
not to drain a fifo when you read them -- they only drain
after you write EV_PENDING.
 2021-08-04 22:40:12 +08:00
Sean Cross
f5cf94524a kernel: add framework for exceptions 
Add the ability to invoke exception handlers. This is not yet properly
wired up, but the framework is there.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-02 11:04:47 +08:00
Sean Cross
2cd42edc22 kernel: use target_os = "none" instead of baremetal 
This is more portable, and plays nicer with `rust-analyzer`.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-07-26 15:32:59 +08:00
Sean Cross
df30fd580d kernel: add Exception(usize) as process state 
When a process encounters an exception of some sort, it will enter this
state if a handler is available.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-07-26 15:32:03 +08:00
Sean Cross
4e17946960 kernel: riscv: ensure stack is 16-byte aligned 
Make sure processes are set up such that the stack is aligned to a
16-byte boundary.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-07-07 14:34:05 +08:00
Sean Cross
4e54bfdc7a kernel: use gdbstub dev/0.6 
The previous brach will shortly be deleted.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-27 19:23:53 +08:00
Sean Cross
7b7be0fe9e hosted: fix MemoryRange refactor 
This fixes the MemoryRange refactor where `.addr` and `.size` are now
private fields.

Previously it had only been tested on baremetal mode.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-24 18:02:28 +08:00
Sean Cross
a99839ecd6 xous: mark MemoryRange fields as private 
Mark the private fields in a `MemoryRange` struct as being private. This
allows us to perform operations on the memory range armed with the
knowledge that the entire range is valid and unaliased.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-24 17:41:16 +08:00
Sean Cross
1fb7d4ebd5 kernel: use unsafe {} on Hosted mode 
Since `MemoryRange::new()` is now unsafe, add an `unsafe {}` note when
calling this function on Hosted mode.

This fixes the build.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-24 17:07:41 +08:00
Sean Cross
977a175bb5 xous: mark MemoryRange::new() as unsafe 
This function allows for creating arbitrary memory ranges. Mark this
function as `unsafe` in order to warn users that this can be used to
create invalid memory regions.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-24 17:02:02 +08:00
Sean Cross
e4d02301ee kernel: support pluggable debug printing 
This allows us to support different printers in the kernel. For example,
this can be used to swap out the println!() function to print to GDB
when a debugger is attached.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-23 17:51:59 +08:00
Sean Cross
931b992063 kernel: gdb_server: return 0xff on read error 
This seems to be rather universal.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-21 20:23:22 +08:00
Sean Cross
524df22667 kernel: riscv: ensure pages are writable when poking 
Ensure pages of memory can be written to when we write to them. This
lets us patch program code to, for example, insert breakpoints.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-21 20:22:45 +08:00
Sean Cross
973e4601e4 kernel: don't use debug_here in CI 
When running in CI, cause processes to panic rather than waiting for a
debugger to attach. This will ensure test failures are caught sooner
rather than later.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-21 20:05:24 +08:00
Sean Cross
4901453e3d syscall: retor_mem: switch to client in hosted mode 
Switch to the message client when returning memory in Hosted mode. This
properly marks a process as ready-to-run, which was otherwise not
correctly done.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-21 20:04:22 +08:00
Sean Cross
86dd38f7fa kernel: fix hosted build 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-21 14:24:16 +08:00
Sean Cross
57b502e2c6 kernel: add gdb support to riscv 
This adds various primitives that can be used to attach a debugger to
the kernel.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-21 14:13:01 +08:00
Sean Cross
0332959068 kernel: debug: add gdb_server support 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-21 14:12:42 +08:00
Sean Cross
80860f0a51 Merge remote-tracking branch 'origin/main' into debugger 2021-06-21 13:22:51 +08:00
Sean Cross
2a1aa24040 kernel: debug: add command to print processes 
This changes the `p` command to only print processes, and renames the
existing behavior to `P` which prints processes and threads.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-18 12:56:27 +08:00
Sean Cross
9ced90190e kernel: fix process suspension 
This enables processes to be "suspended" by going into a Debug state.
Messages will back up and processes will continue to be scheduled around
the suspended process, while the system will continue to operate.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-18 12:55:21 +08:00
Sean Cross
13204d1714 Merge branch 'master' into debugger 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-18 10:56:30 +08:00
bunnie
96ca0eb8a1 Merge remote-tracking branch 'origin/master' into ux-refactor 2021-06-16 17:56:44 +08:00
Sean Cross
180c99aa8d kernel: services: free servers on process termination 
When a process is terminated, we disconnect it from all other processes.
We also need to free the slot in the server table.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-16 17:55:23 +08:00
Sean Cross
76b16579b0 kernel: syscall: remove warning in hosted mode 
This was a function whose only purpose is useful in baremetal mode.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-16 17:54:55 +08:00
Sean Cross
62623f995c Merge branch 'master' of github.com:betrusted-io/xous-core 2021-06-16 16:54:06 +08:00
Sean Cross
fb839f3217 wip 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-16 16:53:40 +08:00
bunnie
a70b858812 convert to using the urandom interface 2021-06-11 16:29:25 +08:00
Sean Cross
651844ba20 Merge remote-tracking branch 'origin/master' into debugger 2021-06-06 19:21:18 +08:00
Sean Cross
3becfc03c5 kernel: debug: store only a single object in GDB_STATE 
This keeps a single object in the global singleton.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-06 11:46:00 +08:00
Sean Cross
29c36c3b0f debug: get kernel building 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-06 11:39:41 +08:00
bunnie
bbfe0fb605 Merge remote-tracking branch 'betrusted/aes' into bunnie-dev 2021-06-02 14:49:11 +08:00
bunnie
fadc9c29ab Merge remote-tracking branch 'origin/master' into bunnie-dev 2021-06-02 03:59:25 +08:00
Sean Cross
bbda4365ae wip commit 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-01 17:57:01 +08:00
bunnie
2f9fa57bdd clock-gate based power management now seems to be more or less working 2021-05-31 23:14:35 +08:00
bunnie
d9e56fd321 very preliminary power savings working 2021-05-31 05:20:54 +08:00
bunnie
7c55925926 intermediate check-in on wfi 2021-05-30 23:07:16 +08:00
Sean Cross
be6e0a9895 kernel: fix thread termination and waiting 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-21 17:23:13 +08:00
Sean Cross
714aff830c kernel: implement JoinThread(tid) 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-21 16:32:38 +08:00
Sean Cross
7c2d3a2247 kernel: implement thread exit support 
Threads now have the ability to exit. Previously this resulted in a
kernel panic.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-21 13:04:14 +08:00
Sean Cross
e616a4bf4f kernel: fix hosted build/warnings 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-20 11:52:03 +08:00
Sean Cross
09b8242bb2 kernel: get process termination "working" on risc-v 
This successfully allows a process to call `terminate_process(val)`.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-20 11:42:31 +08:00
Sean Cross
eb7895d601 xous: add a return code to TerminateProcess 
As part of this refactor, make `terminate_process()` a divergent call.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-20 11:01:00 +08:00
Sean Cross
6e57fbe29b kernel: riscv: make sure to flush mmu 
THe MMU flushing logic got disabled due to an experiment. Re-enable it
to ensure pages are consistent when shifting them across boundaries.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-19 20:55:45 +08:00
Sean Cross
d15127fef6 kernel: run cargo fmt 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-19 14:18:46 +08:00
Sean Cross
47bf453325 kernel: riscv: use raw pointers for mmu mapping 
This avoids using uninitialized arrays to manage the pagetables, and
instead uses raw pointers. This should avoid using potentially
uninitialized data.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-19 14:17:53 +08:00
Sean Cross
25f976dbb6 kernel: claim uart irq before we enable irqs 
In order to prevent a race at the start, claim the IRQ before we enable
the IRQ.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-19 14:17:07 +08:00
Sean Cross
30b82b25b1 kernel: run cargo fmt 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-19 14:12:01 +08:00
Sean Cross
9a9cd25414 kernel: debug: add help screen to debug output 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-10 19:37:30 +08:00
Sean Cross
1b7ee904b2 kernel: print running total of memory usage size 
Print the total of all processes in the system.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-10 15:09:46 +08:00
Sean Cross
5bca939c37 kernel: mem: fix build on hosted mode 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-10 14:42:53 +08:00
Sean Cross
49904988c3 kernel: debug: add simple uart interface 
Wire up the interrupt handler to allow printing various debug
information.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-10 14:37:33 +08:00
Sean Cross
1b85d8a4de kernel: format syscalls as hex 
This improves readability, particuarly when addresses are involved.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-10 14:37:33 +08:00
Sean Cross
040759af25 kernel: services: add process_name(pid) 
Add a function to determine the name of a process.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-10 14:37:33 +08:00
Sean Cross
1818256f5e kernel: mem: add ram_used_by() function 
This can be used to determine the amount of ram used by a particular
process ID.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-10 14:37:33 +08:00
Sean Cross
5b92dd9874 kernel: services: use exception stack for kernel interrupts 
When the kernel is processing an interrupt, use the exception stack.
This ensures that the kernel interrupt handler can switch processes
without having its stack go away.

This is used for debug information.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-10 14:37:33 +08:00
Sean Cross
ce66a6bde2 kernel: riscv: add exception const to mem 
The address of the exception page is now available for use as a standard
variable.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-10 14:37:33 +08:00
Sean Cross
5bd9e40ace kernel: riscv: add print_thread_* family 
These calls can be used to print out thread information for debugging.
This augments the existing `print_thread()` call, which has been renamed
to `print_current_thread()`.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-10 14:37:33 +08:00
bunnie
08a86749fe fix hosted mode bugs 2021-05-09 01:13:16 +08:00
bunnie
c0d72c282b increase process limit 2021-05-06 00:44:32 +08:00
bunnie
f975884f1e increase server limit to 128 2021-05-06 00:41:27 +08:00
Sean Cross
23e759ffd8 kernel: fix multi-page lending 
Due to several errors, multi-page lending did not work properly.

To begin with, if a page was not allocated then it would not be able to
be sent. That is, if you allocated 8192 bytes but only ever accessed the
first 4096 bytes, then an error would be encountered when lending the
unaccessed upper page.

Furthermore, due to a striding error in accessing pointers, half-pages
were treated as full pages.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-05 10:58:12 +08:00
bunnie
46fe3885dc cleanup more turds left over during the bringup of suspend/resume 2021-05-01 00:35:32 +08:00
bunnie
48074b626b clean up more debug messages 2021-04-30 23:33:35 +08:00
bunnie
260b154741 clean up some boot process holdovers 2021-04-30 23:28:31 +08:00
bunnie
640ddb48e8 suspend/resume now works to hardware 2021-04-30 19:29:36 +08:00
bunnie
0e2d57c9fb retrofit the kernel and loader to handle resume 
and now the even harder debuggening begins...zomg o_O
 2021-04-30 01:55:38 +08:00
bunnie
308cda1af4 remove unused sie use 2021-04-25 21:44:21 +08:00
bunnie
77c44ccb76 depracate use of SIE by storing SIM to RAM-based backing 2021-04-25 18:49:57 +08:00
bunnie
aed2325f68 fix some minor bugs in hosted mode 
memory is not page-aligned so `if !cfg()`-out the alignment
checks in hosted mode
 2021-04-09 17:31:36 +08:00