stos: bootvid: Add bootvid driver stub

Signed-off-by: Chloe M. <chloe@mensia.org>

paw/stos/drivers/bootvid/fbio.c

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: Bootvid driver
+ * Author:      Chloe M.
+ */
+
+#include <drivers/bootvid/fbio.h>
+#include <ke/bpal.h>
+#include <ex/trace.h>
+
+#define DTRACE(Fmt, ...) \
+    TRACE("[ BOOTVID ]: " Fmt, ##__VA_ARGS__)
+
+static BPAL_FRAMEBUFFER Framebuffer;
+
+VOID
+BootVidInit(VOID)
+{
+    BPAL_HANDLE BpalHandle;
+
+    KeBpalGetHandle(&BpalHandle);
+    Framebuffer = BpalHandle.Framebuffer;
+
+    DTRACE("framebuffer width: %d\n", Framebuffer.Width);
+    DTRACE("framebuffer height: %d\n", Framebuffer.Height);
+}

paw/stos/head/drivers/bootvid/fbio.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: Bootvid driver
+ * Author:      Chloe M.
+ */
+
+#ifndef _BOOTVID_FBIO_H_
+#define _BOOTVID_FBIO_H_ 1
+
+#include <stdef.h>
+
+/*
+ * Initialize the boot video driver
+ */
+VOID BootVidInit(VOID);
+
+#endif  /* !_BOOTVID_FBIO_H_ */

paw/stos/init/init.c

@@ -10,6 +10,7 @@
 #include <ke/stos.h>
 #include <ke/bpal.h>
 #include <hal/serial.h>
+#include <drivers/bootvid/fbio.h>
 #include <stdef.h>
 
 #define DTRACE(Fmt, ...) \
@@ -36,4 +37,7 @@ KiKernelEntry(VOID)
 
     /* Initialize BPAL */
     KeBpalInit();
+
+    /* Initialize boot video */
+    BootVidInit();
 }

paw/stos/ke/Makefile

@@ -12,6 +12,7 @@ include ../../mk/stos.mk
 CFILES = $(shell find ../init -name "*.c")
 CFILES += $(shell find ../xt -name "*.c")
 CFILES += $(shell find ../lib -name "*.c")
+CFILES += $(shell find ../drivers -name "*.c")
 CFILES += $(shell find bpal -name "*.c")
 DFILES = $(CFILES:.c=.d)
 OFILES = $(CFILES:.c=.o)