From df899527e67c6c02fd317eeae25a9e7d7f6b3e8a Mon Sep 17 00:00:00 2001
From: Freya Murphy <freya@freyacat.org>
Date: Sat, 19 Apr 2025 16:36:51 -0400
Subject: UEFI and republicans

---
 kernel/drivers/gpu/gop.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 kernel/drivers/gpu/gop.c

(limited to 'kernel/drivers/gpu/gop.c')

diff --git a/kernel/drivers/gpu/gop.c b/kernel/drivers/gpu/gop.c
new file mode 100644
index 0000000..47da952
--- /dev/null
+++ b/kernel/drivers/gpu/gop.c
@@ -0,0 +1,27 @@
+#include <lib.h>
+#include <comus/asm.h>
+#include <comus/drivers/gpu.h>
+#include <comus/drivers/gpu/gop.h>
+#include <comus/efi.h>
+#include <efi.h>
+
+struct gpu gop_dev = { 0 };
+
+static EFI_GRAPHICS_OUTPUT_PROTOCOL *gop;
+
+int gop_init(struct gpu **gpu_dev)
+{
+	gop = efi_get_gop();
+	if (gop == NULL || gop->Mode == NULL)
+		return 1;
+
+	gop_dev.name = "GOP";
+	gop_dev.width = gop->Mode->Info->HorizontalResolution;
+	gop_dev.height = gop->Mode->Info->VerticalResolution;
+	gop_dev.bit_depth = 32; // we only allow 8bit color in efi/gop.c
+	gop_dev.framebuffer = kmapaddr((void *)gop->Mode->FrameBufferBase, NULL,
+								   gop->Mode->FrameBufferSize, F_WRITEABLE);
+	*gpu_dev = &gop_dev;
+
+	return 1;
+}
-- 
cgit v1.2.3-freya