Orion

diff --git a/drivers/vga/bga.c b/drivers/vga/bga.c
index aff91aa..4548593 100644
--- a/drivers/vga/bga.c
+++ b/drivers/vga/bga.c
@@ -16,10 +16,12 @@
 
 size_t bga_write(File *file, char *buf, size_t size, off_t offset);
 int bga_ioctl(File *file, unsigned long request, uintptr_t argp);
+void bga_mmap(File *file, void *addr, size_t len, off_t offset);
 
 FileOps bgaFileOps = {
 	.write = bga_write,
 	.ioctl = bga_ioctl,
+	.mmap = bga_mmap,
 };
 
 Driver bgaDriver = {
@@ -129,3 +131,25 @@ bga_ioctl(File *file, unsigned long request, uintptr_t argp)
 		return 0;
 	}
 }
+
+/* Map the linear frame buffer into memory */
+void
+bga_mmap(File *file, void *addr, size_t len, off_t offset)
+{
+	if (offset >= bgaWidth*bgaHeight*(bgaBpp/8))
+		return;
+	if (len + offset > bgaWidth*bgaHeight*(bgaBpp/8))
+		len = (bgaWidth*bgaHeight*(bgaBpp/8)) - offset;
+
+	page_t *pg, new;
+	size_t max, count = 0;
+	while (len) {
+		max = (len < 0x1000) ? len : 0x1000;
+		pg = get_page(addr + count);
+		new = PG_ATTR(*pg);
+		free_page(pg);
+		alloc_page(pg, PG_ATTR(new), 0xFD000000 + offset + count);
+		count += max;
+		len -= max;
+	}
+}