1 files changed, 68 insertions, 0 deletions
diff --git a/kernel/arch/x86_64/limine.cpp b/kernel/arch/x86_64/limine.cpp
new file mode 100644
index 0000000..84f8642
--- /dev/null
+++ b/kernel/arch/x86_64/limine.cpp
@@ -0,0 +1,68 @@
+#include <cstddef>
+#include <stdint.h>
+#include <stddef.h>
+#include "limine.h"
+
+namespace {
+__attribute__((used, section(".requests")))
+volatile LIMINE_BASE_REVISION(2);
+}
+
+namespace {
+__attribute__((used, section(".requests")))
+volatile limine_framebuffer_request framebuffer_request = {
+    .id = LIMINE_FRAMEBUFFER_REQUEST,
+    .revision = 0,
+    .response = nullptr
+};
+}
+
+namespace {
+__attribute__((used, section(".requests_start_marker")))
+volatile LIMINE_REQUESTS_START_MARKER;
+
+__attribute__((used, section(".requests_end_marker")))
+volatile LIMINE_REQUESTS_END_MARKER;
+}
+
+namespace {
+void hcf() {
+    asm("cli");
+    for (;;) {
+        asm("hlt");
+    }
+}
+}
+
+extern void (*__init_array[])();
+extern void (*__init_array_end[])();
+
+
+extern "C" void _start() {
+    if (!LIMINE_BASE_REVISION_SUPPORTED) {
+        hcf();
+    }
+
+    // initialize global constructors
+    for (size_t i = 0; &__init_array[i] != __init_array_end; i++) {
+        __init_array[i]();
+    }
+
+    // Ensure we got a framebuffer.
+    if (framebuffer_request.response == nullptr
+     || framebuffer_request.response->framebuffer_count < 1) {
+        hcf();
+    }
+
+    // Fetch the first framebuffer.
+    limine_framebuffer *framebuffer = framebuffer_request.response->framebuffers[0];
+
+    // Note: we assume the framebuffer model is RGB with 32-bit pixels.
+    for (std::size_t i = 0; i < 100; i++) {
+        volatile uint32_t *fb_ptr = static_cast<volatile uint32_t *>(framebuffer->address);
+        fb_ptr[i * (framebuffer->pitch / 4) + i] = 0xffffff;
+    }
+
+    // We're done, just hang...
+    hcf();
+}
+\ No newline at end of file