78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
/*
|
|
* 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
|
|
static uint8_t g_Edid[256] = {};
|
|
static uint64_t g_EdidSize = 0;
|
|
|
|
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;
|
|
g_EdidSize = framebuffer.edidSize;
|
|
if (g_EdidSize > sizeof(g_Edid)) g_EdidSize = sizeof(g_Edid);
|
|
if (framebuffer.edid == nullptr) g_EdidSize = 0;
|
|
for (uint64_t i = 0; i < g_EdidSize; i++) {
|
|
g_Edid[i] = framebuffer.edid[i];
|
|
}
|
|
|
|
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; }
|
|
const uint8_t* GetEdid(uint64_t* size) {
|
|
if (size) *size = g_EdidSize;
|
|
return g_EdidSize ? g_Edid : nullptr;
|
|
}
|
|
|
|
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)";
|
|
}
|
|
|
|
};
|