1 files changed, 72 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/arch/x86/core/vram_settings.c b/qemu/roms/ipxe/src/arch/x86/core/vram_settings.c
new file mode 100644
index 000000000..9c169b40c
--- /dev/null
+++ b/qemu/roms/ipxe/src/arch/x86/core/vram_settings.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <ipxe/uaccess.h>
+#include <ipxe/settings.h>
+
+/** @file
+ *
+ * Video RAM dump
+ *
+ */
+
+/** Video RAM base address */
+#define VRAM_BASE 0xb8000
+
+/** Video RAM length */
+#define VRAM_LEN \
+	( 80 /* columns */ * 25 /* rows */ * 2 /* bytes per character */ )
+
+/**
+ * Fetch video RAM setting
+ *
+ * @v data		Buffer to fill with setting data
+ * @v len		Length of buffer
+ * @ret len		Length of setting data, or negative error
+ */
+static int vram_fetch ( void *data, size_t len ) {
+	userptr_t vram = phys_to_user ( VRAM_BASE );
+
+	/* Copy video RAM */
+	if ( len > VRAM_LEN )
+		len = VRAM_LEN;
+	copy_from_user ( data, vram, 0, len );
+
+	return VRAM_LEN;
+}
+
+/** Video RAM setting */
+const struct setting vram_setting __setting ( SETTING_MISC, vram ) = {
+	.name = "vram",
+	.description = "Video RAM",
+	.type = &setting_type_base64,
+	.scope = &builtin_scope,
+};
+
+/** Video RAM built-in setting */
+struct builtin_setting vram_builtin_setting __builtin_setting = {
+	.setting = &vram_setting,
+	.fetch = vram_fetch,
+};