feat(rumpk): Phase 3 - Cooperative Fiber Scheduling
TIME HAS BEEN INVENTED ====================== Rumpk now has cooperative multitasking with Fibers. BOOT OUTPUT ----------- [Fiber A] I am alive! Yielding to B... [Fiber B] Hello from B! Yielding to A... [Fiber A] I am back! Yielding to B... [Fiber B] Returned! Yielding to A... [Fiber A] Final return. Halting. IMPLEMENTATION -------------- hal/switch.S: - ARM64 context switch (96-byte frame, 16-byte aligned) - Saves x19-x28, x29 (FP), x30 (LR) - Stack pointer swap between fibers core/fiber.nim: - FiberObject with state (sp, entry) - fiber_trampoline() - entry point for new fibers - init_fiber() - sets up initial stack frame - switch() - cooperative yield to another fiber BUILD FIXES ----------- - Added -fno-sanitize=all to prevent ubsan interference - Added --checks:off --assertions:off to Nim - Fixed stack alignment (104 -> 96 bytes) PHASES COMPLETED ---------------- ✅ Phase 1: Documentation (SPEC-008/009/010) ✅ Phase 2: Pure Zig libc (Freestanding Doctrine) ✅ Phase 3: Cooperative Fibers (Ping Pong) → Phase 4: NPL loading + Ed25519 → Phase 5: VisionFive 2 RISC-V The unikernel can now multiplex execution. POSIX threads are optional. We own the scheduler.
This commit is contained in:
Markus Maiwald
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||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
0
|
||||
343 9464223 1767078031260762209 c99e175f5398d2ed6a7964a9c4dbfc1c 0 /home/markus/zWork/_Git/Nexus/core/rumpk/build/nimcache/@m..@s..@s..@s..@s..@s..@s..@s..@susr@slib@snim@sstd@ssyncio.nim.c
|
||||
19164 69191110 1749873121000000000 fe5756ed84745fc96fd9dfb15050f599 0 /usr/lib/nim/nimbase.h
|
||||
639 9459383 1767076381899751290 1b9448bcfa47e3161459266750e8ded4 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/limits.h
|
||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
0
|
||||
343 9464213 1767078031258762242 c99e175f5398d2ed6a7964a9c4dbfc1c 0 /home/markus/zWork/_Git/Nexus/core/rumpk/build/nimcache/@m..@s..@s..@s..@s..@s..@s..@s..@susr@slib@snim@sstd@sprivate@sdragonbox.nim.c
|
||||
19164 69191110 1749873121000000000 fe5756ed84745fc96fd9dfb15050f599 0 /usr/lib/nim/nimbase.h
|
||||
639 9459383 1767076381899751290 1b9448bcfa47e3161459266750e8ded4 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/limits.h
|
||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
0
|
||||
343 9464214 1767078031258762242 c99e175f5398d2ed6a7964a9c4dbfc1c 0 /home/markus/zWork/_Git/Nexus/core/rumpk/build/nimcache/@m..@s..@s..@s..@s..@s..@s..@s..@susr@slib@snim@sstd@sprivate@sschubfach.nim.c
|
||||
19164 69191110 1749873121000000000 fe5756ed84745fc96fd9dfb15050f599 0 /usr/lib/nim/nimbase.h
|
||||
639 9459383 1767076381899751290 1b9448bcfa47e3161459266750e8ded4 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/limits.h
|
||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
0
|
||||
343 9464217 1767078031259762226 c99e175f5398d2ed6a7964a9c4dbfc1c 0 /home/markus/zWork/_Git/Nexus/core/rumpk/build/nimcache/@m..@s..@s..@s..@s..@s..@s..@s..@susr@slib@snim@ssystem@sdollars.nim.c
|
||||
19164 69191110 1749873121000000000 fe5756ed84745fc96fd9dfb15050f599 0 /usr/lib/nim/nimbase.h
|
||||
639 9459383 1767076381899751290 1b9448bcfa47e3161459266750e8ded4 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/limits.h
|
||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
0
|
||||
343 9464203 1767078031258762242 c99e175f5398d2ed6a7964a9c4dbfc1c 0 /home/markus/zWork/_Git/Nexus/core/rumpk/build/nimcache/@m..@s..@s..@s..@s..@s..@s..@s..@susr@slib@snim@sstd@sprivate@ssince.nim.c
|
||||
19164 69191110 1749873121000000000 fe5756ed84745fc96fd9dfb15050f599 0 /usr/lib/nim/nimbase.h
|
||||
639 9459383 1767076381899751290 1b9448bcfa47e3161459266750e8ded4 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/limits.h
|
||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
0
|
||||
343 9464216 1767078031259762226 c99e175f5398d2ed6a7964a9c4dbfc1c 0 /home/markus/zWork/_Git/Nexus/core/rumpk/build/nimcache/@m..@s..@s..@s..@s..@s..@s..@s..@susr@slib@snim@sstd@sobjectdollar.nim.c
|
||||
19164 69191110 1749873121000000000 fe5756ed84745fc96fd9dfb15050f599 0 /usr/lib/nim/nimbase.h
|
||||
639 9459383 1767076381899751290 1b9448bcfa47e3161459266750e8ded4 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/limits.h
|
||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
0
|
||||
343 9464207 1767078031258762242 c99e175f5398d2ed6a7964a9c4dbfc1c 0 /home/markus/zWork/_Git/Nexus/core/rumpk/build/nimcache/@m..@s..@s..@s..@s..@s..@s..@s..@susr@slib@snim@ssystem@smemory.nim.c
|
||||
19164 69191110 1749873121000000000 fe5756ed84745fc96fd9dfb15050f599 0 /usr/lib/nim/nimbase.h
|
||||
639 9459383 1767076381899751290 1b9448bcfa47e3161459266750e8ded4 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/limits.h
|
||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
|
|
@ -0,0 +1,8 @@
|
|||
0
|
||||
15874 9464226 1767078031260762209 d133b7af4a91c5ff6970726948774437 0 /home/markus/zWork/_Git/Nexus/core/rumpk/build/nimcache/@mkernel.nim.c
|
||||
19164 69191110 1749873121000000000 fe5756ed84745fc96fd9dfb15050f599 0 /usr/lib/nim/nimbase.h
|
||||
639 9459383 1767076381899751290 1b9448bcfa47e3161459266750e8ded4 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/limits.h
|
||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
499 9459330 1767076360432003062 357ccd6329b0128cce0610c1443c600d 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/string.h
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
0
|
||||
343 9464208 1767078031258762242 c99e175f5398d2ed6a7964a9c4dbfc1c 0 /home/markus/zWork/_Git/Nexus/core/rumpk/build/nimcache/@m..@s..@s..@s..@s..@s..@s..@s..@susr@slib@snim@sstd@sprivate@sdigitsutils.nim.c
|
||||
19164 69191110 1749873121000000000 fe5756ed84745fc96fd9dfb15050f599 0 /usr/lib/nim/nimbase.h
|
||||
639 9459383 1767076381899751290 1b9448bcfa47e3161459266750e8ded4 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/limits.h
|
||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
0
|
||||
343 9464205 1767078031258762242 c99e175f5398d2ed6a7964a9c4dbfc1c 0 /home/markus/zWork/_Git/Nexus/core/rumpk/build/nimcache/@m..@s..@s..@s..@s..@s..@s..@s..@susr@slib@snim@sstd@ssysatomics.nim.c
|
||||
19164 69191110 1749873121000000000 fe5756ed84745fc96fd9dfb15050f599 0 /usr/lib/nim/nimbase.h
|
||||
639 9459383 1767076381899751290 1b9448bcfa47e3161459266750e8ded4 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/limits.h
|
||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
0
|
||||
343 9464215 1767078031259762226 c99e175f5398d2ed6a7964a9c4dbfc1c 0 /home/markus/zWork/_Git/Nexus/core/rumpk/build/nimcache/@m..@s..@s..@s..@s..@s..@s..@s..@susr@slib@snim@sstd@sformatfloat.nim.c
|
||||
19164 69191110 1749873121000000000 fe5756ed84745fc96fd9dfb15050f599 0 /usr/lib/nim/nimbase.h
|
||||
639 9459383 1767076381899751290 1b9448bcfa47e3161459266750e8ded4 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/limits.h
|
||||
268 9459347 1767076422997272233 06a4c7da1c4987981a369ef3e003bda3 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stddef.h
|
||||
155 9459777 1767076495338437553 9cc523d7a8a3a0bbc7c7af0fabeafc0b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdbool.h
|
||||
924 9459799 1767076530759032485 73bc6834aef9958f6652470b63d7814b 0 /home/markus/zWork/_Git/Nexus/core/rumpk/core/include/stdint.h
|
||||
25
build.sh
25
build.sh
|
|
@ -20,9 +20,9 @@ mkdir -p "$BUILD_DIR"
|
|||
mkdir -p "$BUILD_DIR/nimcache"
|
||||
|
||||
# =========================================================
|
||||
# Step 1: Compile Zig L0 (HAL + Stubs)
|
||||
# Step 1: Compile Zig L0 (HAL + Stubs + Context Switch)
|
||||
# =========================================================
|
||||
echo "[1/4] Compiling Zig L0 (HAL + libc stubs)..."
|
||||
echo "[1/5] Compiling Zig L0 (HAL + libc stubs + context switch)..."
|
||||
|
||||
# Compile main.zig
|
||||
zig build-obj \
|
||||
|
|
@ -38,13 +38,20 @@ zig build-obj \
|
|||
-O ReleaseSmall \
|
||||
-femit-bin="$BUILD_DIR/stubs.o"
|
||||
|
||||
# Compile switch.S (context switch assembly)
|
||||
zig cc \
|
||||
-target aarch64-freestanding-none \
|
||||
-c "$RUMPK_DIR/hal/switch.S" \
|
||||
-o "$BUILD_DIR/switch.o"
|
||||
|
||||
echo " → $BUILD_DIR/hal.o"
|
||||
echo " → $BUILD_DIR/stubs.o"
|
||||
echo " → $BUILD_DIR/switch.o"
|
||||
|
||||
# =========================================================
|
||||
# Step 2: Compile Nim L1 (Kernel)
|
||||
# Step 2: Compile Nim L1 (Kernel + Fibers)
|
||||
# =========================================================
|
||||
echo "[2/4] Compiling Nim L1 (Kernel)..."
|
||||
echo "[2/5] Compiling Nim L1 (Kernel + Fibers)..."
|
||||
|
||||
nim c \
|
||||
--cpu:arm64 \
|
||||
|
|
@ -58,6 +65,10 @@ nim c \
|
|||
--define:StandaloneHeapSize=65536 \
|
||||
-d:release \
|
||||
-d:danger \
|
||||
--checks:off \
|
||||
--assertions:off \
|
||||
--boundChecks:off \
|
||||
--overflowChecks:off \
|
||||
--nimcache:"$BUILD_DIR/nimcache" \
|
||||
--path:"$RUMPK_DIR/core" \
|
||||
-c \
|
||||
|
|
@ -68,7 +79,7 @@ echo " → $BUILD_DIR/nimcache/*.c"
|
|||
# =========================================================
|
||||
# Step 3: Compile Nim C files to objects
|
||||
# =========================================================
|
||||
echo "[3/4] Compiling Nim C files..."
|
||||
echo "[3/5] Compiling Nim C files..."
|
||||
|
||||
for cfile in "$BUILD_DIR/nimcache"/*.c; do
|
||||
ofile="${cfile%.c}.o"
|
||||
|
|
@ -77,6 +88,7 @@ for cfile in "$BUILD_DIR/nimcache"/*.c; do
|
|||
-ffreestanding \
|
||||
-fno-stack-protector \
|
||||
-fno-builtin \
|
||||
-fno-sanitize=all \
|
||||
-I"$RUMPK_DIR/core/include" \
|
||||
-I/usr/lib/nim \
|
||||
-I"$RUMPK_DIR/core" \
|
||||
|
|
@ -89,7 +101,7 @@ echo " → $BUILD_DIR/nimcache/*.o"
|
|||
# =========================================================
|
||||
# Step 4: Link Everything (NO LIBC!)
|
||||
# =========================================================
|
||||
echo "[4/4] Linking (freestanding, no libc)..."
|
||||
echo "[4/5] Linking (freestanding, no libc)..."
|
||||
|
||||
# Collect all Nim object files
|
||||
NIM_OBJS=$(find "$BUILD_DIR/nimcache" -name "*.o" 2>/dev/null | tr '\n' ' ')
|
||||
|
|
@ -105,6 +117,7 @@ zig cc \
|
|||
-T "$RUMPK_DIR/boot/linker.ld" \
|
||||
"$BUILD_DIR/hal.o" \
|
||||
"$BUILD_DIR/stubs.o" \
|
||||
"$BUILD_DIR/switch.o" \
|
||||
$NIM_OBJS \
|
||||
-o "$BUILD_DIR/rumpk.elf"
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,83 @@
|
|||
# MARKUS MAIWALD (ARCHITECT) | VOXIS FORGE (AI)
|
||||
# RUMPK CORE // FIBER
|
||||
# The atom of execution.
|
||||
|
||||
{.push stackTrace: off, lineTrace: off.}
|
||||
|
||||
type
|
||||
FiberState* = object
|
||||
sp*: uint64 # The Stack Pointer (Must be first field!)
|
||||
entry*: proc() {.cdecl.} # Entry point for this fiber
|
||||
|
||||
Fiber* = ptr FiberObject
|
||||
FiberObject* = object
|
||||
id*: uint64
|
||||
name*: cstring
|
||||
state*: FiberState
|
||||
stack*: ptr UncheckedArray[uint8]
|
||||
stack_size*: int
|
||||
|
||||
# Import the Assembly Magic
|
||||
proc cpu_switch_to(prev_sp_ptr: ptr uint64, next_sp: uint64) {.importc, cdecl.}
|
||||
|
||||
# Import console for debugging
|
||||
proc console_write(p: pointer, len: csize_t) {.importc, cdecl.}
|
||||
|
||||
proc debug(s: string) =
|
||||
if s.len > 0:
|
||||
console_write(unsafeAddr s[0], csize_t(s.len))
|
||||
|
||||
# Context Frame Size: 6 pairs * 16 bytes = 96 bytes (16-byte aligned!)
|
||||
const CONTEXT_SIZE = 96
|
||||
|
||||
# Stack Helper (Simple 4KB aligned stack)
|
||||
const STACK_SIZE* = 4096
|
||||
|
||||
# We need a "Main" fiber to represent the boot thread
|
||||
var main_fiber: FiberObject
|
||||
var current_fiber*: Fiber = addr main_fiber
|
||||
|
||||
# Trampoline that calls the fiber's entry point
|
||||
proc fiber_trampoline() {.cdecl, exportc, noreturn.} =
|
||||
let f = current_fiber
|
||||
|
||||
if f.state.entry != nil:
|
||||
f.state.entry()
|
||||
|
||||
# If the fiber returns, halt
|
||||
while true:
|
||||
{.emit: "asm volatile(\"wfi\");".}
|
||||
|
||||
proc init_fiber*(f: Fiber, entry: proc() {.cdecl.}, stack_base: pointer) =
|
||||
f.state.entry = entry
|
||||
|
||||
# Start at top of stack
|
||||
var sp = cast[uint64](stack_base) + STACK_SIZE
|
||||
|
||||
# 1. Align to 16 bytes (Strict requirement)
|
||||
sp = sp and not 15'u64
|
||||
|
||||
# 2. Reserve space for the context frame (96 bytes)
|
||||
sp = sp - CONTEXT_SIZE
|
||||
|
||||
# 3. Setup the Context
|
||||
var stack_ptr = cast[ptr UncheckedArray[uint64]](sp)
|
||||
|
||||
# Zero out registers x19-x28 (indices 0-9)
|
||||
for i in 0..<10:
|
||||
stack_ptr[i] = 0
|
||||
|
||||
# Set x29 (FP) to 0 - Offset 80 / 8 = index 10
|
||||
stack_ptr[10] = 0
|
||||
|
||||
# Set x30 (LR) to trampoline - Offset 88 / 8 = index 11
|
||||
stack_ptr[11] = cast[uint64](fiber_trampoline)
|
||||
|
||||
f.state.sp = sp
|
||||
|
||||
proc switch*(next: Fiber) =
|
||||
let prev = current_fiber
|
||||
current_fiber = next
|
||||
cpu_switch_to(addr prev.state.sp, next.state.sp)
|
||||
|
||||
{.pop.}
|
||||
|
|
@ -6,6 +6,8 @@
|
|||
|
||||
{.push stackTrace: off, lineTrace: off.}
|
||||
|
||||
import fiber
|
||||
|
||||
# =========================================================
|
||||
# HAL Imports from Zig (Layer 0)
|
||||
# =========================================================
|
||||
|
|
@ -51,6 +53,34 @@ proc malloc(size: csize_t): pointer {.importc, cdecl.}
|
|||
proc free(p: pointer) {.importc, cdecl.}
|
||||
proc realloc(p: pointer, size: csize_t): pointer {.importc, cdecl.}
|
||||
|
||||
# =========================================================
|
||||
# Fiber Test: Ping Pong
|
||||
# =========================================================
|
||||
|
||||
var fiber_a: FiberObject
|
||||
var stack_a: array[4096, uint8]
|
||||
|
||||
var fiber_b: FiberObject
|
||||
var stack_b: array[4096, uint8]
|
||||
|
||||
proc thread_a_entry() {.cdecl.} =
|
||||
kprintln("[Fiber A] I am alive! Yielding to B...")
|
||||
switch(addr fiber_b)
|
||||
kprintln("[Fiber A] I am back! Yielding to B...")
|
||||
switch(addr fiber_b)
|
||||
kprintln("[Fiber A] Final return. Halting.")
|
||||
while true:
|
||||
{.emit: "asm volatile(\"wfi\");".}
|
||||
|
||||
proc thread_b_entry() {.cdecl.} =
|
||||
kprintln("[Fiber B] Hello from B! Yielding to A...")
|
||||
switch(addr fiber_a)
|
||||
kprintln("[Fiber B] Returned! Yielding to A...")
|
||||
switch(addr fiber_a)
|
||||
kprintln("[Fiber B] Final return. Halting.")
|
||||
while true:
|
||||
{.emit: "asm volatile(\"wfi\");".}
|
||||
|
||||
# =========================================================
|
||||
# Kernel Main Entry
|
||||
# =========================================================
|
||||
|
|
@ -67,10 +97,21 @@ proc kmain() {.exportc, cdecl.} =
|
|||
kprintln("[Rumpk L1] The Rubicon is crossed.")
|
||||
kprintln("[Rumpk L1] Zig + Nim = Sovereign Metal.")
|
||||
kprintln("")
|
||||
kprintln("[Rumpk L1] Entering idle loop...")
|
||||
kprintln("[Rumpk L1] Initializing Fibers...")
|
||||
|
||||
# Idle loop - in real kernel, this would be the scheduler
|
||||
while true:
|
||||
{.emit: "asm volatile(\"wfi\");".}
|
||||
# Initialize Fibers
|
||||
fiber_a.name = "Fiber A"
|
||||
fiber_b.name = "Fiber B"
|
||||
|
||||
init_fiber(addr fiber_a, thread_a_entry, addr stack_a[0])
|
||||
init_fiber(addr fiber_b, thread_b_entry, addr stack_b[0])
|
||||
|
||||
# Jump into the matrix
|
||||
kprintln("[Kernel] Switching to Fiber A...")
|
||||
kprintln("")
|
||||
switch(addr fiber_a)
|
||||
|
||||
# We should never get here unless Fiber A switches back to Main
|
||||
nimPanic("Main thread returned!")
|
||||
|
||||
{.pop.}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,47 @@
|
|||
/* MARKUS MAIWALD (ARCHITECT) | VOXIS FORGE (AI)
|
||||
RUMPK HAL // CONTEXT SWITCH
|
||||
|
||||
System V ABI (AArch64) requires we save:
|
||||
- x19..x28 (Callee-saved general purpose)
|
||||
- x29 (Frame Pointer)
|
||||
- x30 (Link Register / Return Address)
|
||||
|
||||
Frame Size: 6 pairs * 16 bytes = 96 bytes (16-byte aligned!)
|
||||
*/
|
||||
|
||||
.global cpu_switch_to
|
||||
.type cpu_switch_to, @function
|
||||
|
||||
// void cpu_switch_to(uint64_t* prev_sp_ptr, uint64_t next_sp);
|
||||
// x0 = pointer to storage for old stack pointer
|
||||
// x1 = new stack pointer value
|
||||
|
||||
cpu_switch_to:
|
||||
// 1. Save Context (96 bytes = 16-byte aligned)
|
||||
sub sp, sp, #96
|
||||
|
||||
stp x19, x20, [sp, #0]
|
||||
stp x21, x22, [sp, #16]
|
||||
stp x23, x24, [sp, #32]
|
||||
stp x25, x26, [sp, #48]
|
||||
stp x27, x28, [sp, #64]
|
||||
stp x29, x30, [sp, #80]
|
||||
|
||||
// 2. Save Old SP
|
||||
mov x9, sp
|
||||
str x9, [x0]
|
||||
|
||||
// 3. Load New SP
|
||||
mov sp, x1
|
||||
|
||||
// 4. Restore Context
|
||||
ldp x19, x20, [sp, #0]
|
||||
ldp x21, x22, [sp, #16]
|
||||
ldp x23, x24, [sp, #32]
|
||||
ldp x25, x26, [sp, #48]
|
||||
ldp x27, x28, [sp, #64]
|
||||
ldp x29, x30, [sp, #80]
|
||||
|
||||
add sp, sp, #96
|
||||
|
||||
ret
|
||||
Loading…
Reference in New Issue