Added very basic VESA driver. Will be improved in the future (right now

it doesn't really do anything, it just passes the initial frame buffer
on to the app_server).
While it seems to work on real hardware (if you set the video mode to
640x480x32, app_server restriction), under Bochs, the app_server crashes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12273 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/graphics/vesa/utility.h

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2005, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef UTILITY_H
+#define UTILITY_H
+
+#define ROUND_TO_PAGE_SIZE(x) (((x) + (B_PAGE_SIZE) - 1) & ~((B_PAGE_SIZE) - 1))
+
+#endif	/* UTILITY_H */

headers/private/graphics/vesa/vesa_info.h

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2005, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef VESA_INFO_H
+#define VESA_INFO_H
+
+
+#include <Drivers.h>
+#include <Accelerant.h>
+#include <PCI.h>
+
+
+#define DEVICE_NAME				"vesa"
+#define VESA_ACCELERANT_NAME	"vesa.accelerant"
+
+
+struct vesa_shared_info {
+	int32			type;
+	area_id			mode_list_area;		// area containing display mode list
+	uint32			mode_count;
+	display_mode	current_mode;
+	uint32			bytes_per_row;
+
+	area_id			registers_area;		// area of memory mapped registers
+	area_id			frame_buffer_area;	// area of frame buffer
+	uint8			*frame_buffer;		// pointer to frame buffer (visible by all apps!)
+	uint8			*physical_frame_buffer;
+};
+
+struct vesa_info {
+	uint32			cookie_magic;
+	int32			open_count;
+	int32			id;
+	pci_info		*pci;
+	uint8			*registers;
+	area_id			registers_area;
+	struct vesa_shared_info *shared_info;
+	area_id			shared_area;
+	uint8			*frame_buffer;
+	area_id			frame_buffer_area;
+	uint8			*reloc_io;
+	area_id			reloc_io_area;
+};
+
+//----------------- ioctl() interface ----------------
+
+// list ioctls
+enum {
+	VESA_GET_PRIVATE_DATA = B_DEVICE_OP_CODES_END + 1,
+	VESA_GET_DEVICE_NAME,
+};
+
+//----------------------------------------------------------
+
+extern status_t vesa_init(vesa_info &info);
+extern void vesa_uninit(vesa_info &info);
+
+#endif	/* VESA_INFO_H */