114 lines
3.0 KiB
Zig
114 lines
3.0 KiB
Zig
// MARKUS MAIWALD (ARCHITECT) | VOXIS FORGE (AI)
|
|
// RUMPK HAL // RISC-V ENTRY
|
|
const std = @import("std");
|
|
const uart = @import("uart.zig");
|
|
const virtio_net = @import("virtio_net.zig");
|
|
|
|
// =========================================================
|
|
// Entry Point (Naked)
|
|
// =========================================================
|
|
|
|
export fn _start() callconv(.naked) noreturn {
|
|
asm volatile (
|
|
// 1. Disable Interrupts
|
|
\\ csrw sie, zero
|
|
\\ csrw satp, zero
|
|
// 1.1 Enable FPU (sstatus.FS = Initial [01])
|
|
\\ li t0, 0x2000
|
|
\\ csrs sstatus, t0
|
|
|
|
// 1.2 Initialize Global Pointer
|
|
\\ .option push
|
|
\\ .option norelax
|
|
\\ la gp, __global_pointer$
|
|
\\ .option pop
|
|
|
|
// 2. Set up Stack (Load address of stack_bytes, add size)
|
|
\\ la sp, stack_bytes
|
|
\\ li t0, 65536
|
|
\\ add sp, sp, t0
|
|
|
|
// 3. Jump to Zig Entry
|
|
\\ call zig_entry
|
|
\\ 1: wfi
|
|
\\ j 1b
|
|
);
|
|
unreachable;
|
|
}
|
|
|
|
// =========================================================
|
|
// Stack (64KB)
|
|
// =========================================================
|
|
export var stack_bytes: [64 * 1024]u8 align(16) = undefined;
|
|
|
|
const hud = @import("hud.zig");
|
|
|
|
// =========================================================
|
|
// Zig Higher-Level Entry
|
|
// =========================================================
|
|
|
|
extern fn kmain() void;
|
|
extern fn NimMain() void;
|
|
|
|
export fn zig_entry() void {
|
|
// UART init (QEMU default 0x10000000)
|
|
uart.init_riscv();
|
|
uart.print("[Rumpk L0] zig_entry reached\n");
|
|
|
|
// HUD DISABLED FOR PHASE 8.7 - LINEAR LOGGING ONLY
|
|
// hud.set_color(36); // Cyan
|
|
// hud.draw_box(1, 1, 80, 3, "RUMPK HUD v0.1");
|
|
// hud.draw_box(1, 4, 80, 20, "NEXSHELL CONSOLE");
|
|
// hud.draw_box(1, 24, 80, 2, "IDENTITY");
|
|
// hud.move_to(2, 4);
|
|
// uart.print("CPU: RISC-V 64 | STATUS: INITIALIZING | MASK: SOVEREIGN");
|
|
// hud.move_to(25, 4);
|
|
// uart.print("CELL: /Cell/Root | ID: 0xDEADBEEF");
|
|
// hud.move_to(5, 4);
|
|
// hud.reset_color();
|
|
|
|
uart.print("[Rumpk RISC-V] Handing off to Nim L1...\n");
|
|
// VirtIO Init moved to Kernel L1 (Sovereign Mode)
|
|
_ = virtio_net;
|
|
|
|
// Initialize Nim Runtime
|
|
NimMain();
|
|
|
|
// Call Kernel
|
|
kmain();
|
|
|
|
// Halt if return
|
|
rumpk_halt();
|
|
}
|
|
|
|
// =========================================================
|
|
// HAL Exports to Nim (ABI Contract)
|
|
// =========================================================
|
|
|
|
export fn console_write(ptr: [*]const u8, len: usize) void {
|
|
uart.write_bytes(ptr[0..len]);
|
|
}
|
|
|
|
export fn console_read() c_int {
|
|
if (uart.read_byte()) |b| {
|
|
return @as(c_int, b);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
export fn rumpk_halt() noreturn {
|
|
uart.print("[Rumpk L0] Halting.\n");
|
|
while (true) {
|
|
asm volatile ("wfi");
|
|
}
|
|
}
|
|
|
|
var mock_ticks: u64 = 0;
|
|
|
|
export fn rumpk_timer_now_ns() u64 {
|
|
// Phase 1 Mock: Incrementing counter to simulate time passage per call
|
|
// This allows Watchdog logic to detect elapsed "time" in coop loop.
|
|
mock_ticks += 100000; // 100us per call
|
|
return mock_ticks;
|
|
}
|