diff options
| author | EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com> | 2024-05-05 03:36:30 -0400 |
|---|---|---|
| committer | EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com> | 2024-05-06 02:27:20 -0400 |
| commit | 982baec992d48343e455bf6e32ca96fbdcddda01 (patch) | |
| tree | f5ac833e239d56871b997f9027db00d96cbbb667 /kernel/arch/x86_64/limine.cpp | |
| parent | 4aa74dbe2a35a45668b33d688f17b680c2232572 (diff) | |
liminefied x86_64 boot
Diffstat (limited to 'kernel/arch/x86_64/limine.cpp')
| -rw-r--r-- | kernel/arch/x86_64/limine.cpp | 68 |
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 |