20000317 sourceware import

libgloss/mips/dvemon.c

@@ -0,0 +1,83 @@
+/* dve.c -- I/O code for the Densan DVE-R3900 board.
+ *
+ * Copyright (c) 1998, 1999 Cygnus Support
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+/* Flag indicating that we are being debugged by GDB.  If set,
+   preceded each character output to the console with a ^O,
+   so that GDB will print it instead of discarding it.  */
+
+int output_debug = 1;
+
+/* Monitor "ci" function (console input) */
+
+typedef int (*cifunc)(int waitflag);
+#ifdef __mips64
+static cifunc ci = (cifunc) 0xffffffffbfc00010L;
+#else
+static cifunc ci = (cifunc) 0xbfc00010;
+#endif
+
+#define WAIT    1
+#define NOWAIT  0 
+#define NOCHAR  (-1)
+
+/* Monitor "co" function (console output) */
+
+typedef void (*cofunc)(int c);
+#ifdef __mips64
+static cofunc co = (cofunc) 0xffffffffbfc00018L;
+#else
+static cofunc co = (cofunc) 0xbfc00018;
+#endif
+
+/*  outbyte -- shove a byte out the serial port; used by write.c.  */
+
+int
+outbyte(byte)
+     unsigned char byte;
+{
+  /* Output a ^O prefix so that GDB won't discard the output.  */
+  if (output_debug)
+    co (0x0f);
+
+  co (byte);
+  return byte;
+}
+
+/* inbyte -- get a byte from the serial port; used by read.c.  */
+
+unsigned char
+inbyte()
+{
+  return (unsigned char) ci (WAIT);
+}
+
+
+/* Structure filled in by get_mem_info.  Only the size field is
+   actually used (by sbrk), so the others aren't even filled in.  */
+
+struct s_mem
+{
+  unsigned int size;
+  unsigned int icsize;
+  unsigned int dcsize;
+};
+
+
+void
+get_mem_info (mem)
+     struct s_mem *mem;
+{
+  mem->size = 0x1000000;	/* DVE-R3900 board has 16 MB of RAM */
+}