Clean checkin of the 6.03 code
BUG: 32495852
Change-Id: I5038a3bb41e217380c1188463daec07b1e9b6b48
diff --git a/memdisk/bda.h b/memdisk/bda.h
new file mode 100644
index 0000000..cfac441
--- /dev/null
+++ b/memdisk/bda.h
@@ -0,0 +1,56 @@
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2001-2009 H. Peter Anvin - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author: H. Peter Anvin
+ *
+ * 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, Inc., 53 Temple Place Ste 330,
+ * Boston MA 02111-1307, USA; either version 2 of the License, or
+ * (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+#include <stdint.h>
+
+/* Addresses in the zero page */
+#define BIOS_INT13 (0x13*4) /* INT 13h vector */
+#define BIOS_INT15 (0x15*4) /* INT 15h vector */
+#define BIOS_INT1E (0x1E*4) /* INT 1Eh vector */
+#define BIOS_INT40 (0x40*4) /* INT 13h vector */
+#define BIOS_INT41 (0x41*4) /* INT 41h vector */
+#define BIOS_INT46 (0x46*4) /* INT 46h vector */
+#define BIOS_BASEMEM 0x413 /* Amount of DOS memory */
+#define BIOS_EQUIP 0x410 /* BIOS equipment list */
+#define BIOS_HD_COUNT 0x475 /* Number of hard drives present */
+
+/* Access to objects in the zero page */
+static inline void wrz_8(uint32_t addr, uint8_t data)
+{
+ *((uint8_t *) addr) = data;
+}
+
+static inline void wrz_16(uint32_t addr, uint16_t data)
+{
+ *((uint16_t *) addr) = data;
+}
+
+static inline void wrz_32(uint32_t addr, uint32_t data)
+{
+ *((uint32_t *) addr) = data;
+}
+
+static inline uint8_t rdz_8(uint32_t addr)
+{
+ return *((uint8_t *) addr);
+}
+
+static inline uint16_t rdz_16(uint32_t addr)
+{
+ return *((uint16_t *) addr);
+}
+
+static inline uint32_t rdz_32(uint32_t addr)
+{
+ return *((uint32_t *) addr);
+}
