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.

1 files changed, 0 insertions, 273 deletions

diff --git a/src/kernel/fdt.cc b/src/kernel/fdt.cc
deleted file mode 100644
index ae09c84..0000000
--- a/src/kernel/fdt.cc
+++ /dev/null
@@ -1,273 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard Qin
- * LumeOS - FDT Parser
- *
- * Parses the Flattened Device Tree to discover hardware.
- * Populates g_devices for use by all drivers.
- */
-#include "common/types.h"
-#include "kernel/fdt.h"
-#include "lib/string.h"
-
-// Global device registry
-DeviceRegistry g_devices;
-
-// Keep g_dtb_addr for PMM to protect DTB pages
-// g_dtb_addr is defined in entry.S, g_uart_base in config.cc
-extern "C" uint64 g_dtb_addr;
-extern uint64 g_uart_base;
-
-static inline uint32 bswap(uint32 x)
-{
-    return ((x & 0xFF) << 24) | ((x & 0xFF00) << 8) |
-           ((x & 0xFF0000) >> 8) | ((x >> 24) & 0xFF);
-}
-
-struct fdt_header
-{
-    uint32 magic;
-    uint32 totalsize;
-    uint32 off_dt_struct;
-    uint32 off_dt_strings;
-    uint32 off_mem_rsvmap;
-    uint32 version;
-    uint32 last_comp_version;
-    uint32 boot_cpuid_phys;
-    uint32 size_dt_strings;
-    uint32 size_dt_struct;
-};
-
-#define FDT_MAGIC 0xd00dfeed
-#define FDT_BEGIN_NODE 1
-#define FDT_END_NODE 2
-#define FDT_PROP 3
-#define FDT_NOP 4
-#define FDT_END 9
-
-// Check if 'str' starts with 'prefix'
-static bool starts_with(const char *str, const char *prefix)
-{
-    while (*prefix)
-    {
-        if (*str != *prefix)
-            return false;
-        str++;
-        prefix++;
-    }
-    return true;
-}
-
-// Check if 'haystack' contains 'needle' as a substring within 'len' bytes
-// (compatible strings may have multiple null-separated entries)
-static bool compat_match(const uint8 *data, uint32 len, const char *needle)
-{
-    uint32 nlen = strlen(needle);
-    for (uint32 i = 0; i + nlen <= len; i++)
-    {
-        if (memcmp(data + i, needle, nlen) == 0)
-            return true;
-    }
-    return false;
-}
-
-// Add a MMIO region to the registry (avoids duplicates)
-static void add_mmio_region(uint64 base, uint64 size)
-{
-    if (base == 0 || size == 0)
-        return;
-    // Only track I/O regions below RAM
-    if (base >= 0x80000000ULL)
-        return;
-    if (g_devices.mmio_count >= DeviceRegistry::MAX_MMIO)
-        return;
-
-    // Check for overlap/duplicate
-    for (int i = 0; i < g_devices.mmio_count; i++)
-    {
-        if (g_devices.mmio_regions[i].base == base)
-            return;
-    }
-
-    g_devices.mmio_regions[g_devices.mmio_count].base = base;
-    g_devices.mmio_regions[g_devices.mmio_count].size = size;
-    g_devices.mmio_count++;
-}
-
-void fdt_parse(uint64 dtb)
-{
-    // Clear registry
-    memset(&g_devices, 0, sizeof(g_devices));
-
-    if (dtb == 0)
-        return;
-
-    g_dtb_addr = dtb;
-
-    struct fdt_header *header = (struct fdt_header *)dtb;
-    if (bswap(header->magic) != FDT_MAGIC)
-        return;
-
-    uint8 *struct_ptr = (uint8 *)(dtb + bswap(header->off_dt_struct));
-    char *strings_ptr = (char *)(dtb + bswap(header->off_dt_strings));
-
-    // Parsing state
-    char current_node_name[64];
-    current_node_name[0] = '\0';
-
-    // Per-node state
-    uint64 current_reg_addr = 0;
-    uint64 current_reg_size = 0;
-    uint32 current_irq = 0;
-    const uint8 *current_compat = nullptr;
-    uint32 current_compat_len = 0;
-    bool has_reg = false;
-    bool has_compat = false;
-    // bool has_irq = false; // Unused
-
-    // Depth tracking (for #address-cells / #size-cells)
-    // Default for root: 2 address-cells, 2 size-cells
-    int depth = 0;
-
-    while (1)
-    {
-        uint32 token = bswap(*(uint32 *)struct_ptr);
-        struct_ptr += 4;
-
-        if (token == FDT_END)
-            break;
-        if (token == FDT_NOP)
-            continue;
-
-        if (token == FDT_BEGIN_NODE)
-        {
-            // Save node name
-            // char *name = (char *)struct_ptr;
-            int i = 0;
-            while (*struct_ptr != 0 && i < 63)
-            {
-                current_node_name[i++] = *struct_ptr;
-                struct_ptr++;
-            }
-            current_node_name[i] = '\0';
-            while (*struct_ptr != 0)
-                struct_ptr++;
-            struct_ptr++;
-            struct_ptr = (uint8 *)(((uint64)struct_ptr + 3) & ~3);
-
-            // Reset per-node state
-            current_reg_addr = 0;
-            current_reg_size = 0;
-            current_irq = 0;
-            current_compat = nullptr;
-            current_compat_len = 0;
-            has_reg = false;
-            has_compat = false;
-            // has_irq = false;
-
-            depth++;
-        }
-        else if (token == FDT_END_NODE)
-        {
-            // Process the node we just finished
-            if (has_reg && has_compat)
-            {
-                // UART: ns16550a
-                if (compat_match(current_compat, current_compat_len, "ns16550"))
-                {
-                    g_devices.uart.base_addr = current_reg_addr;
-                    g_devices.uart.size = current_reg_size ? current_reg_size : 0x100;
-                    g_devices.uart.irq = current_irq;
-                    add_mmio_region(current_reg_addr, g_devices.uart.size);
-                }
-                // PLIC
-                else if (compat_match(current_compat, current_compat_len, "plic"))
-                {
-                    g_devices.plic.base_addr = current_reg_addr;
-                    g_devices.plic.size = current_reg_size ? current_reg_size : 0x4000000;
-                    g_devices.plic.irq = 0;
-                    add_mmio_region(current_reg_addr, g_devices.plic.size);
-                }
-                // CLINT
-                else if (compat_match(current_compat, current_compat_len, "clint"))
-                {
-                    g_devices.clint.base_addr = current_reg_addr;
-                    g_devices.clint.size = current_reg_size ? current_reg_size : 0x10000;
-                    g_devices.clint.irq = 0;
-                    add_mmio_region(current_reg_addr, g_devices.clint.size);
-                }
-                // VirtIO
-                else if (compat_match(current_compat, current_compat_len, "virtio"))
-                {
-                    if (g_devices.virtio_count < DeviceRegistry::MAX_VIRTIO)
-                    {
-                        int idx = g_devices.virtio_count++;
-                        g_devices.virtio[idx].base_addr = current_reg_addr;
-                        g_devices.virtio[idx].size = current_reg_size ? current_reg_size : 0x1000;
-                        g_devices.virtio[idx].irq = current_irq;
-                        add_mmio_region(current_reg_addr, g_devices.virtio[idx].size);
-                    }
-                }
-            }
-
-            // Memory node: name starts with "memory"
-            if (has_reg && starts_with(current_node_name, "memory"))
-            {
-                g_devices.mem_base = current_reg_addr;
-                g_devices.mem_size = current_reg_size;
-            }
-
-            depth--;
-        }
-        else if (token == FDT_PROP)
-        {
-            uint32 len = bswap(*(uint32 *)struct_ptr);
-            struct_ptr += 4;
-            uint32 nameoff = bswap(*(uint32 *)struct_ptr);
-            struct_ptr += 4;
-
-            char *name = strings_ptr + nameoff;
-            uint8 *data = struct_ptr;
-
-            struct_ptr += len;
-            struct_ptr = (uint8 *)(((uint64)struct_ptr + 3) & ~3);
-
-            if (strcmp(name, "reg") == 0 && len >= 8)
-            {
-                // Assume 2 address-cells, 2 size-cells (standard for QEMU virt)
-                uint32 hi = bswap(*(uint32 *)data);
-                uint32 lo = bswap(*(uint32 *)(data + 4));
-                current_reg_addr = ((uint64)hi << 32) | lo;
-
-                if (len >= 16)
-                {
-                    uint32 shi = bswap(*(uint32 *)(data + 8));
-                    uint32 slo = bswap(*(uint32 *)(data + 12));
-                    current_reg_size = ((uint64)shi << 32) | slo;
-                }
-                has_reg = true;
-            }
-            else if (strcmp(name, "compatible") == 0)
-            {
-                current_compat = data;
-                current_compat_len = len;
-                has_compat = true;
-            }
-            else if (strcmp(name, "interrupts") == 0 && len >= 4)
-            {
-                current_irq = bswap(*(uint32 *)data);
-                // has_irq = true;
-            }
-            else if (strcmp(name, "interrupts-extended") == 0 && len >= 8)
-            {
-                // interrupts-extended = <&phandle irq_num>
-                // IRQ number is typically the second cell
-                current_irq = bswap(*(uint32 *)(data + 4));
-                // has_irq = true;
-            }
-        }
-    }
-
-    // Legacy compat
-    g_uart_base = g_devices.uart.base_addr;
-}
\ No newline at end of file