95 lines
2.5 KiB
Zig
95 lines
2.5 KiB
Zig
// MARKUS MAIWALD (ARCHITECT) | VOXIS FORGE (AI)
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// RUMPK HAL // RISC-V ENTRY
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const std = @import("std");
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const uart = @import("uart.zig");
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const virtio_net = @import("virtio_net.zig");
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// =========================================================
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// Entry Point (Naked)
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// =========================================================
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export fn _start() callconv(.naked) noreturn {
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asm volatile (
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// 1. Disable Interrupts
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\\ csrw sie, zero
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\\ csrw satp, zero
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// 1.1 Enable FPU (sstatus.FS = Initial [01])
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\\ li t0, 0x2000
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\\ csrs sstatus, t0
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// 2. Set up Stack (Load address of stack_bytes, add size)
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\\ la sp, stack_bytes
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\\ li t0, 65536
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\\ add sp, sp, t0
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// 3. Jump to Zig Entry
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\\ call zig_entry
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\\ 1: wfi
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\\ j 1b
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);
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unreachable;
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}
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// =========================================================
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// Stack (64KB)
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// =========================================================
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export var stack_bytes: [64 * 1024]u8 align(16) = undefined;
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const hud = @import("hud.zig");
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// =========================================================
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// Zig Higher-Level Entry
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// =========================================================
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extern fn kmain() void;
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extern fn NimMain() void;
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export fn zig_entry() void {
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// UART init (QEMU default 0x10000000)
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uart.init_riscv();
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uart.print("[Rumpk L0] zig_entry reached\n");
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// HUD DRAW (No CLEAR for debug)
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hud.set_color(36); // Cyan
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hud.draw_box(1, 1, 80, 3, "RUMPK HUD v0.1");
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hud.draw_box(1, 4, 80, 20, "NEXSHELL CONSOLE");
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hud.draw_box(1, 24, 80, 2, "IDENTITY");
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hud.move_to(2, 4);
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uart.print("CPU: RISC-V 64 | STATUS: INITIALIZING | MASK: SOVEREIGN");
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hud.move_to(25, 4);
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uart.print("CELL: /Cell/Root | ID: 0xDEADBEEF");
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hud.move_to(5, 4);
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hud.reset_color();
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uart.print("[Rumpk RISC-V] Handing off to Nim L1...\n");
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// VirtIO Init moved to Kernel L1 (Sovereign Mode)
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_ = virtio_net;
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// Initialize Nim Runtime
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NimMain();
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// Call Kernel
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kmain();
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// Halt if return
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rumpk_halt();
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}
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// =========================================================
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// HAL Exports to Nim (ABI Contract)
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// =========================================================
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export fn console_write(ptr: [*]const u8, len: usize) void {
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uart.write_bytes(ptr[0..len]);
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}
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export fn rumpk_halt() noreturn {
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uart.print("[Rumpk L0] Halting.\n");
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while (true) {
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asm volatile ("wfi");
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}
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}
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