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67 commits

Author SHA1 Message Date
Toby Jaffey
adec69e1d7 Attempt to enable RV32 C extension. c.lw and c.sw are definitely broken somehow wrt MMIO memory. 
Examples built using C extensions, many fail in strange ways
 2025-12-17 15:43:15 +00:00
Toby Jaffey
d0407c074f Update all of the Emacs mode style comments, so they register in github as C.
Some checks are pending
CI / test (ubuntu-latest) (push) Waiting to run
Details
2025-12-16 17:06:49 +00:00
Toby Jaffey
6a6d7f1832 Only call checkKeys() when rendering, as it will pause VM 2025-12-15 14:07:00 +00:00
Toby Jaffey
09985655a2 Fix host-sdl/doom audio. Have app ask via syscall if audio can be rendered before sending, else any mismatch in rates will cause queue over/underflow in host-sdl. 2025-12-15 10:48:10 +00:00
Toby Jaffey
4e61e3bd4a Make self and mandel examples a bit smaller
Some checks are pending
CI / test (ubuntu-latest) (push) Waiting to run
Details
2025-12-15 01:12:47 +00:00
Toby Jaffey
4741900562 Tick agnes before drawing each screen, but no faster. 2025-12-15 00:59:27 +00:00
Toby Jaffey
035608b04a Add agnes NES emulator (very slow). 
Add -W <n> -H <n> width and height options to host-sdl
 2025-12-15 00:37:12 +00:00
Toby Jaffey
39e7dddc5a Quick and dirty sound for DOOM. Samplerate seems off, but it's just a demo. 2025-12-14 23:32:34 +00:00
Toby Jaffey
065d2c64aa TinyGL example 2025-12-14 14:45:10 +00:00
Toby Jaffey
a635846e69 Remove -fpeel-loops, now that real issue has been fixed. 2025-12-14 09:50:14 +00:00
Stéphane Travostino
cdfae7d453 apps/maze: fix possible stack overflow 
The original code this app is inspired from uses rand(), which returns
a number >= 0.
mulberry32() on the other hand can return a negative number, in which
case will overflow the accesses in the dirs array. Fix that by forcing
the result to be unsigned.
 2025-12-14 10:15:04 +01:00
Toby Jaffey
cfc1286874 Regenerate binaries, now default crt0 has changed 2025-12-14 01:36:47 +00:00
Toby Jaffey
173d5056a5 Completely remove UVM32_STACK_PROTECTION unless enabled (requires manually changing crt0.S), as this saves 16 bytes on every .bin 2025-12-14 00:09:32 +00:00
Toby Jaffey
1c9e9296be xxd -n (set variable name) doesn't exist on all systems, use shell utilities to build the headers 
Fixes #1
 2025-12-13 22:20:38 +00:00
Toby Jaffey
8158ac647c Renaming and documentating header 2025-12-12 20:42:26 +00:00
Toby Jaffey
147a9f2198 Split includes. 
All code needs uvm32_sys.h, but uvm32_common_custom.h is optional (and has defs needed for demos)
 2025-12-12 15:56:47 +00:00
Toby Jaffey
ef948e9797 Move target app only includes under apps/common 2025-12-12 15:49:03 +00:00
Toby Jaffey
5bd6a32013 Move all app common files under apps/common 2025-12-12 15:45:17 +00:00
Toby Jaffey
cb717ed108 use only the amount of extram needed 2025-12-12 15:01:30 +00:00
Toby Jaffey
ce63353156 Update makefile 2025-12-12 14:29:50 +00:00
Toby Jaffey
238b4c5fcf Update for new sdl-host 2025-12-12 14:23:55 +00:00
Toby Jaffey
2108083b75 Only send syscall every other frame, which makes VM stop to draw 2025-12-12 00:03:33 +00:00
Toby Jaffey
2d07f6fcc0 Munching squares 2025-12-11 23:53:43 +00:00
Toby Jaffey
e7485d5972 SDL based host with extram mapped to framebuffer and simple gfx app to accompany it 2025-12-11 23:31:10 +00:00
Toby Jaffey
577aaadacd Zig allocator demo, using extram 2025-12-11 21:18:21 +00:00
Toby Jaffey
a5018dab2f Fix path 2025-12-11 20:53:56 +00:00
Toby Jaffey
1eb03f1747 Fix path 2025-12-11 20:53:03 +00:00
Toby Jaffey
447af909c2 Add memtest and heap examples to build 2025-12-11 20:36:17 +00:00
Toby Jaffey
42cd77a9ff Cleanup paths 2025-12-11 20:35:39 +00:00
Toby Jaffey
f27ed6213c Example of setting up malloc heap on extram 2025-12-11 20:35:11 +00:00
Toby Jaffey
0ded19d04a Basic memory test 2025-12-11 17:46:20 +00:00
Toby Jaffey
67e8fe13c0 Add commandline parsing to host. Add -e <size in bytes> option to configure extram. 2025-12-11 15:44:17 +00:00
Toby Jaffey
7353810199 Move all host examples under host/ 2025-12-11 12:57:59 +00:00
Toby Jaffey
1213c5673f Do .bin inclusion in C code at build 2025-12-11 12:48:41 +00:00
Toby Jaffey
7c9d56ee69 Add fib to apps makefile 2025-12-11 11:52:42 +00:00
Toby Jaffey
8802b4c268 Maze works at -O2 with -fpeel-loops 2025-12-11 01:33:04 +00:00
Toby Jaffey
58f8caee5a Prevent gcc converting block copies/sets to memcpy() and memset(), which don't exist. 2025-12-11 01:10:55 +00:00
Toby Jaffey
e0eb6615c0 maze crashes at high optimisation level, when "maze" variable gets memset 2025-12-10 23:59:11 +00:00
Toby Jaffey
23fc50c820 Unused. 2025-12-10 23:58:43 +00:00
Toby Jaffey
508d41c8c5 Remove stackoverflow error, have one CORE_INTERNAL error for catastrophic crash 2025-12-10 18:42:34 +00:00
Toby Jaffey
da7f70c456 Initial test framework 
Clean up makefiles
Everything buildable under docker (or natively)
 2025-12-10 16:36:33 +00:00
Toby Jaffey
e07eeab043 Make yield a regular syscall taking an argument. 
Allows "wait for interrupt"/"wait for event" type operation where VM code blocks until the host has something for it.
 2025-12-10 10:35:18 +00:00
Toby Jaffey
9baedb42e8 Add a stack canary, setup on boot 2025-12-10 01:00:36 +00:00
Toby Jaffey
9596838a4b Recursive maze demo, causes big stack usage 2025-12-09 23:29:16 +00:00
Toby Jaffey
76fba39a21 Rework syscall ABI. 
Syscalls now accept two parameters, allowing for things like "int count = read(buf, len)"
Rather than providing safe signatures for syscalls, the user is now given helper functions to safely parse incoming values, c-strings and slices.
 2025-12-09 21:51:35 +00:00
Toby Jaffey
37a178aad7 Remove refs to old CSRs 2025-12-09 01:23:46 +00:00
Toby Jaffey
3cdc9ae0ca Default behaviour is to run to end of main 2025-12-09 01:19:09 +00:00
Toby Jaffey
d56f34dc4e Use cursors 2025-12-09 00:56:07 +00:00
Toby Jaffey
04e7aaef88 Exit on keypress 2025-12-09 00:54:22 +00:00
Toby Jaffey
b6f271ca5a Add newlines 2025-12-09 00:31:41 +00:00