cleanup: rename Graphics:Cursor => Graphics::Framebuffer

kernel/src/Graphics/Framebuffer.cpp

@@ -0,0 +1,65 @@
+/*
+    * Framebuffer.cpp
+    * Framebuffer information storage
+    * Copyright (c) 2025 Daniel Hammer
+*/
+
+#include "Framebuffer.hpp"
+#include <Terminal/Terminal.hpp>
+#include <Memory/HHDM.hpp>
+#include <Memory/Paging.hpp>
+#include <CppLib/Stream.hpp>
+
+namespace Graphics::Framebuffer {
+
+    // Framebuffer state
+    static uint32_t* g_FbBase   = nullptr;
+    static uint64_t  g_FbWidth  = 0;
+    static uint64_t  g_FbHeight = 0;
+    static uint64_t  g_FbPitch  = 0; // in bytes
+
+    void Initialize(const montauk::boot::Framebuffer& framebuffer) {
+        g_FbBase   = reinterpret_cast<uint32_t*>(framebuffer.address);
+        g_FbWidth  = framebuffer.width;
+        g_FbHeight = framebuffer.height;
+        g_FbPitch  = framebuffer.pitch;
+
+        Kt::KernelLogStream(Kt::OK, "Graphics") << "Framebuffer initialized ("
+            << (uint64_t)g_FbWidth << "x" << (uint64_t)g_FbHeight << ")";
+    }
+
+    uint32_t* GetBase()   { return g_FbBase; }
+    uint64_t  GetWidth()  { return g_FbWidth; }
+    uint64_t  GetHeight() { return g_FbHeight; }
+    uint64_t  GetPitch()  { return g_FbPitch; }
+
+    void Set(uint32_t* base, uint64_t width, uint64_t height, uint64_t pitch) {
+        g_FbBase = base;
+        g_FbWidth = width;
+        g_FbHeight = height;
+        g_FbPitch = pitch;
+        Kt::KernelLogStream(Kt::OK, "Graphics") << "Framebuffer switched ("
+            << (uint64_t)g_FbWidth << "x" << (uint64_t)g_FbHeight << ")";
+    }
+
+    uint64_t GetPhysBase() {
+        return Memory::SubHHDM((uint64_t)g_FbBase);
+    }
+
+    void MapWriteCombining() {
+        uint64_t fbPhys = GetPhysBase();
+        uint64_t fbSize = g_FbHeight * g_FbPitch;
+        uint64_t numPages = (fbSize + 0xFFF) / 0x1000;
+
+        for (uint64_t i = 0; i < numPages; i++) {
+            uint64_t phys = fbPhys + i * 0x1000;
+            Memory::VMM::g_paging->MapWC(phys, Memory::HHDM(phys));
+        }
+
+        Memory::VMM::FlushTLB();
+
+        Kt::KernelLogStream(Kt::OK, "Graphics") << "Framebuffer mapped as Write-Combining ("
+            << kcp::dec << numPages << " pages)";
+    }
+
+};