kernel: add header files

include/kernel/fb.h

@@ -0,0 +1,49 @@
+#ifndef KERNEL_FB_H_
+#define KERNEL_FB_H_
+
+#include <stdint.h>
+
+enum framebuffer_flags {
+	FB_MODE_RGB = 0x01u,
+	FB_MODE_VGATEXT = 0x02u,
+	FB_MODE_PALETTE = 0x04u,
+};
+
+struct framebuffer_bitfield {
+	uint32_t b_offset;
+	uint16_t b_length;
+};
+
+struct framebuffer_varinfo {
+	enum framebuffer_flags fb_flags;
+
+	uint32_t fb_xres;
+	uint32_t fb_yres;
+	uint32_t fb_bpp;
+	uint32_t fb_stride;
+
+	union {
+		struct {
+			uint32_t fb_xcells;
+			uint32_t fb_ycells;
+		};
+
+		struct {
+			struct framebuffer_bitfield fb_red;
+			struct framebuffer_bitfield fb_green;
+			struct framebuffer_bitfield fb_blue;
+			struct framebuffer_bitfield fb_alpha;
+		};
+
+		struct {
+			uintptr_t fb_palette_addr;
+			uint16_t fb_palette_nr_colours;
+		};
+	};
+};
+
+struct framebuffer_fixedinfo {
+	uint64_t fb_baseptr;
+};
+
+#endif