-/* Remote serial interface for GO32, for GDB, the GNU Debugger.
- Copyright 1992 Free Software Foundation, Inc.
+/* Remote serial interface for local (hardwired) serial ports for GO32.
+ Copyright 1992, 1993 Free Software Foundation, Inc.
This file is part of GDB.
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-/* This file shows most of the obvious problems of code written for
- the IBM PC. FIXME. -- gnu@cygnus.com, Sep92 */
-
#include "defs.h"
-
-/* dummy */
-struct ttystate;
-
#include "serial.h"
-
#include <sys/dos.h>
#define SIGNATURE 0x4154
#define VERSION 1
#define OFFSET 0x104
-/*#define MONO 1*/
-
-#define dprintf if(0)printf
-
-#ifdef __GNUC__
-#define far
#define peek(a,b) (*(unsigned short *)(0xe0000000 + (a)*16 + (b)))
-#endif
typedef struct {
short jmp_op;
short iov;
} ASYNC_STRUCT;
-static ASYNC_STRUCT far *async;
+static ASYNC_STRUCT *async;
static int iov;
#define com_rb iov
#define com_tb iov
static int fd;
-
-#if MONO
-#include <sys/pc.h>
-static int mono_pos=0;
-#define mono_rx 0x07
-#define mono_tx 0x70
-
-void
-mono_put(char byte, char attr)
+static char *
+aptr(p)
+ short p;
{
- ScreenSecondary[320+mono_pos+80] = 0x0720;
- ScreenSecondary[320+mono_pos] = (attr<<8) | (byte&0xff);
- mono_pos = (mono_pos+1) % 1200;
-}
-
-#endif
-
-static char far *
-aptr(short p)
-{
-#ifdef __GNUC__
return (char *)((unsigned)async - OFFSET + p);
-#else
- return (char far *)MK_FP(FP_SEG(async), p);
-#endif
}
-static ASYNC_STRUCT far *
+static ASYNC_STRUCT *
getivec(int which)
{
- ASYNC_STRUCT far *a;
+ ASYNC_STRUCT *a;
if (peek(0, which*4) != OFFSET)
return 0;
-#ifdef __GNUC__
a = (ASYNC_STRUCT *)(0xe0000000 + peek(0, which*4+2)*16 + peek(0, which*4));
-#else
- a = (ASYNC_STRUCT far *)MK_FP(peek(0,which*4+2),peek(0,which*4));
-#endif
if (a->signature != SIGNATURE)
return 0;
if (a->version != VERSION)
return a;
}
-int
+static int
dos_async_init()
{
int i;
- ASYNC_STRUCT far *a1;
- ASYNC_STRUCT far *a2;
+ ASYNC_STRUCT *a1;
+ ASYNC_STRUCT *a2;
a1 = getivec(12);
a2 = getivec(11);
async = 0;
outportb(com_mcr, 0x0b);
async->getp = async->putp = async->buffer_start;
-#if MONO
- for (i=0; i<1200; i++)
- ScreenSecondary[320+i] = 0x0720;
-#endif
if (iov > 0x300)
return 1;
else
return 2;
}
-void
-dos_async_tx(char c)
+static void
+dos_async_tx(c)
+ const char c;
{
- dprintf("dos_async_tx: enter %x - with IOV %x", c, com_lsr);
- fflush(stdout);
while (~inportb(com_lsr) & 0x20);
+
outportb(com_tb, c);
-#if MONO
- mono_put(c, mono_tx);
-#endif
- dprintf("exit\n");
}
-int
+static int
dos_async_ready()
{
return (async->getp != async->putp);
}
-int
+static int
dos_async_rx()
{
char rv;
- dprintf("dos_async_rx: enter - ");
- fflush(stdout);
+
while (!dos_async_ready())
- if (kbhit())
- {
- printf("abort!\n");
- return 0;
- }
- dprintf("async=%x getp=%x\n", async, async->getp);
- fflush(stdout);
+ if (kbhit())
+ {
+ printf("abort!\n");
+ return 0;
+ }
+
rv = *aptr(async->getp++);
-#if MONO
- mono_put(rv, mono_rx);
-#endif
if (async->getp >= async->buffer_end)
- async->getp = async->buffer_start;
- dprintf("exit %x\n", rv);
- return rv;
-}
-
-int
-dos_kb_ready()
-{
- return (peek(0x40,0x1a) != peek(0x40,0x1c));
-}
+ async->getp = async->buffer_start;
-int
-dos_kb_rx()
-{
-#ifdef __GNUC__
- return getkey();
-#else
- return getch();
-#endif
+ return rv;
}
-int
-dosasync_read (int fd, char *buffer, int length, int timeout)
+static int
+dosasync_read (fd, buf, len, timeout)
+ int fd;
+ char *buf;
+ int len;
+ int timeout;
{
long now, then;
- int l = length;
+ int l = len;
+
time (&now);
- then = now+timeout;
- dprintf("dosasync_read: enter(%d,%d)\n", length, timeout);
+ then = now + timeout;
+
while (l--)
- {
- if (timeout)
{
- while (!dos_async_ready())
- {
- time (&now);
- if (now == then)
- {
- dprintf("dosasync_read: timeout(%d)\n", length-l-1);
- return length-l-1;
- }
- }
+ if (timeout)
+ {
+ while (!dos_async_ready())
+ {
+ time (&now);
+ if (now >= then)
+ return len - l - 1;
+ }
+ }
+ *buf++ = dos_async_rx();
}
- *buffer++ = dos_async_rx();
- }
- dprintf("dosasync_read: exit %d\n", length);
- return length;
-}
-int
-dosasync_write(int fd, const char *buffer, int length)
-{
- int l = length;
- while (l--)
- dos_async_tx(*buffer++);
- return length;
+ return len;
}
+static int
+dosasync_write(fd, buf, len)
+ int fd;
+ const char *buf;
+ int len;
+{
+ int l = len;
+ while (l--)
+ dos_async_tx (*buf++);
-char *
-strlwr(char *s)
-{
- char *p = s;
- while (*s)
- {
- if ((*s >= 'A') && (*s <= 'Z'))
- *s += 'a'-'A';
- s++;
- }
- return p;
+ return len;
}
-sigsetmask()
+static int
+go32_open (scb, name)
+ serial_t scb;
+ const char *name;
{
-}
-\f
-const char *
-serial_default_name ()
-{
- return "com1";
-}
-
+ scb->fd = dos_async_init();
+ if (scb->fd)
+ return 1;
-void
-serial_raw (fd, old)
-int fd;
-struct ttystate *old;
-{
- /* Always in raw mode */
+ return 0;
}
-
-int
-serial_open (name)
- const char *name;
+static void
+go32_raw (scb)
+ serial_t scb;
{
- fd = dos_async_init();
- if (fd) return 1;
- return 0;
+ /* Always in raw mode */
}
-int
-serial_readchar (to)
- int to;
+static int
+go32_readchar (scb, timeout)
+ serial_t scb;
+ int timeout;
{
char buf;
- if (dosasync_read(fd, &buf, 1, to))
+
+ if (dosasync_read(scb->fd, &buf, 1, timeout))
return buf;
else
return -2; /* Timeout, I guess */
}
-int
-serial_setbaudrate (rate)
- int rate;
+static int
+go32_setbaudrate (scb, rate)
+ serial_t scb;
+ int rate;
{
return 0;
}
-int
-serial_nextbaudrate (rate)
- int rate;
+static int
+go32_write (scb, str, len)
+ serial_t scb;
+ const char *str;
+ int len;
+{
+ dosasync_write(scb->fd, str, len);
+}
+
+static void
+go32_close ()
{
- return 0;
}
-int
-serial_write (str, len)
- const char *str;
- int len;
+static void
+go32_restore (scb)
+ serial_t scb;
{
- dosasync_write(fd, str, len);
}
-void
-serial_close ()
+static struct serial_ops go32_ops =
+{
+ "hardwire",
+ 0,
+ go32_open,
+ go32_close,
+ go32_readchar,
+ go32_write,
+ go32_raw,
+ go32_restore,
+ go32_setbaudrate
+};
+
+_initialize_ser_go32 ()
{
+ serial_add_interface (&go32_ops);
}
projects / binutils-gdb.git / commitdiff