Split USB and Distributed DMA into their own files in preparation for the overhaul of the VIA southbridges.

src/include/86box/ddma.h

@@ -0,0 +1,56 @@
+/*
+ * 86Box	A hypervisor and IBM PC system emulator that specializes in
+ *		running old operating systems and software designed for IBM
+ *		PC systems and compatibles from 1981 through fairly recent
+ *		system designs based on the PCI bus.
+ *
+ *		This file is part of the 86Box distribution.
+ *
+ *		Implementation of the ISA Bus (de)Bugger expansion card
+ *		sold as a DIY kit in the late 1980's in The Netherlands.
+ *		This card was a assemble-yourself 8bit ISA addon card for
+ *		PC and AT systems that had several tools to aid in low-
+ *		level debugging (mostly for faulty BIOSes, bootloaders
+ *		and system kernels...)
+ *
+ *		Definitions for the Distributed DMA emulation.
+ *
+ *
+ *
+ * Authors:	Miran Grca, <mgrca8@gmail.com>
+ *
+ *		Copyright 2020 Miran Grca.
+ */
+#ifndef DDMA_H
+# define DDMA_H
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct
+{
+    uint16_t		io_base;
+    int			channel, enable;
+} ddma_channel_t;
+
+typedef struct
+{
+    ddma_channel_t	channels[8];
+} ddma_t;
+
+
+/* Global variables. */
+extern const device_t	ddma_device;
+
+
+/* Functions. */
+extern void		ddma_update_io_mapping(ddma_t *dev, int ch, uint8_t base_l, uint8_t base_h, int enable);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif	/*DDMA_H*/