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/* 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 */
}
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