From e90b72ec3082588b296956730bd2930cf8d5d671 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Fri, 10 Jul 2026 11:31:46 +0800
Subject: refactor: promote new architecture to repository root

Archive the deprecated implementation under lume-legacy, make the new kernel the default root-level build, and update repository entry points without changing kernel behavior.
---
 src/drivers/plic.cc | 77 -----------------------------------------------------
 1 file changed, 77 deletions(-)
 delete mode 100644 src/drivers/plic.cc

(limited to 'src/drivers/plic.cc')

diff --git a/src/drivers/plic.cc b/src/drivers/plic.cc
deleted file mode 100644
index a975c44..0000000
--- a/src/drivers/plic.cc
+++ /dev/null
@@ -1,77 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard Qin
- */
-#include "common/types.h"
-#include "kernel/riscv.h"
-#include "drivers/plic.h"
-#include "drivers/uart.h"
-#include "kernel/fdt.h"
-
-// Helper Macros — all relative to PLIC base from FDT
-#define PLIC_BASE      (g_devices.plic.base_addr)
-#define PLIC_PRIORITY  (PLIC_BASE + 0x0)
-#define PLIC_PENDING   (PLIC_BASE + 0x1000)
-
-#define PLIC_SENABLE_ADDR(hart) (PLIC_BASE + 0x2080 + (hart) * 0x100)
-#define PLIC_STHRESHOLD_ADDR(hart) (PLIC_BASE + 0x201000 + (hart) * 0x2000)
-#define PLIC_SCLAIM_ADDR(hart) (PLIC_BASE + 0x201004 + (hart) * 0x2000)
-
-// Helper for Volatile Access
-static inline volatile uint32 *REG32(uint64 addr)
-{
-    return reinterpret_cast<volatile uint32 *>(addr);
-}
-
-namespace PLIC
-{
-    void init()
-    {
-        // Set priority for UART IRQ
-        if (g_devices.uart.irq > 0)
-            *REG32(PLIC_PRIORITY + g_devices.uart.irq * 4) = 1;
-
-        // Set priority for all VirtIO IRQs
-        for (int i = 0; i < g_devices.virtio_count; i++)
-        {
-            if (g_devices.virtio[i].irq > 0)
-                *REG32(PLIC_PRIORITY + g_devices.virtio[i].irq * 4) = 1;
-        }
-    }
-
-    void inithart()
-    {
-        int hart = static_cast<int>(r_tp());
-
-        // Build enable bitmask from discovered devices
-        uint32 enable = 0;
-
-        if (g_devices.uart.irq > 0 && g_devices.uart.irq < 32)
-            enable |= (1 << g_devices.uart.irq);
-
-        for (int i = 0; i < g_devices.virtio_count; i++)
-        {
-            if (g_devices.virtio[i].irq > 0 && g_devices.virtio[i].irq < 32)
-                enable |= (1 << g_devices.virtio[i].irq);
-        }
-
-        *REG32(PLIC_SENABLE_ADDR(hart)) = enable;
-
-        // Set Priority Threshold to 0 (Allow all)
-        *REG32(PLIC_STHRESHOLD_ADDR(hart)) = 0;
-
-        Drivers::uart_puts("[PLIC] Hart Init Done.\n");
-    }
-
-    int claim()
-    {
-        int hart = static_cast<int>(r_tp());
-        return *REG32(PLIC_SCLAIM_ADDR(hart));
-    }
-
-    void complete(int irq)
-    {
-        int hart = static_cast<int>(r_tp());
-        *REG32(PLIC_SCLAIM_ADDR(hart)) = static_cast<uint32>(irq);
-    }
-}
\ No newline at end of file
-- 
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