vgabios: Add support for vesa get/set window function.

[seabios.git] / vgasrc / bochsvga.c

diff --git a/vgasrc/bochsvga.c b/vgasrc/bochsvga.c
index 6cbbf9c8fddff1ec4a2016fffaa56bb356928800..74da887b56842057865c18c5d93d88e977a6b101 100644 (file)
--- a/vgasrc/bochsvga.c
+++ b/vgasrc/bochsvga.c
@@ -198,6 +198,25 @@ bochsvga_hires_enable(int enable)
     dispi_write(VBE_DISPI_INDEX_ENABLE, flags);
 }
 
+int
+bochsvga_get_window(struct vgamode_s *vmode_g, int window)
+{
+    if (window != 0)
+        return -1;
+    return dispi_read(VBE_DISPI_INDEX_BANK);
+}
+
+int
+bochsvga_set_window(struct vgamode_s *vmode_g, int window, int val)
+{
+    if (window != 0)
+        return -1;
+    dispi_write(VBE_DISPI_INDEX_BANK, val);
+    if (dispi_read(VBE_DISPI_INDEX_BANK) != val)
+        return -1;
+    return 0;
+}
+
 static void
 bochsvga_clear_scr(void)
 {