-/* 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
+/* This is unused for now. We just return a placeholder. */
+struct go32_ttystate
+{
+ int bogus;
+};
typedef struct {
short jmp_op;
short iov;
} ASYNC_STRUCT;
-static ASYNC_STRUCT far *async;
+static int go32_open PARAMS ((serial_t scb, const char *name));
+static void go32_raw PARAMS ((serial_t scb));
+static int wait_for PARAMS ((serial_t scb, int timeout));
+static int go32_readchar PARAMS ((serial_t scb, int timeout));
+static int rate_to_code PARAMS ((int rate));
+static int go32_setbaudrate PARAMS ((serial_t scb, int rate));
+static int go32_write PARAMS ((serial_t scb, const char *str, int len));
+static void go32_restore PARAMS ((serial_t scb));
+static void go32_close PARAMS ((serial_t scb));
+static serial_ttystate go32_get_tty_state PARAMS ((serial_t scb));
+static int go32_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
+static int strncasecmp PARAMS ((char *str1, char *str2, int len));
+static char *aptr PARAMS ((short p));
+static ASYNC_STRUCT *getivec PARAMS ((int which));
+static int dos_async_init PARAMS ((int port));
+static void dos_async_tx PARAMS ((const char c));
+static int dos_async_ready PARAMS (());
+static int dos_async_rx PARAMS (());
+static int dosasync_read PARAMS ((int fd, char *buf, int len, int timeout));
+static int dosasync_write PARAMS ((int fd, const char *buf, int len));
+
+#define SIGNATURE 0x4154
+#define VERSION 1
+#define OFFSET 0x104
+
+#define peek(a,b) (*(unsigned short *)(0xe0000000 + (a)*16 + (b)))
+
+static ASYNC_STRUCT *async;
static int iov;
#define com_rb iov
#define com_tb iov
#define com_lsr iov+5
#define com_msr iov+6
-static int fd;
+static int
+strncasecmp(str1, str2, len)
+ char *str1, *str2;
+ register int len;
+{
+ unsigned char c1, c2;
+ for (; len != 0; --len)
+ {
+ c1 = *str1++;
+ c2 = *str2++;
-#if MONO
-#include <sys/pc.h>
-static int mono_pos=0;
-#define mono_rx 0x07
-#define mono_tx 0x70
+ if (toupper(c1) != toupper(c2))
+ return toupper(c1) - toupper(c2);
-void
-mono_put(char byte, char attr)
-{
- ScreenSecondary[320+mono_pos+80] = 0x0720;
- ScreenSecondary[320+mono_pos] = (attr<<8) | (byte&0xff);
- mono_pos = (mono_pos+1) % 1200;
+ if (c1 == '\0')
+ return 0;
+ }
+ return 0;
}
-#endif
-
-static char far *
-aptr(short p)
+static char *
+aptr(p)
+ 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 0;
+
return a;
}
-int
-dos_async_init()
+static int
+dos_async_init(port)
+ int port;
{
int i;
- ASYNC_STRUCT far *a1;
- ASYNC_STRUCT far *a2;
- a1 = getivec(12);
- a2 = getivec(11);
- async = 0;
- if (a1)
- async = a1;
- if (a2)
- async = a2;
- if (a1 && a2)
- {
- if (a1 < a2)
- async = a1;
- else
- async = a2;
- }
- if (async == 0)
- {
- error("GDB can not connect to asynctsr program, check that it is installed\n\
+
+ switch (port)
+ {
+ case 1:
+ async = getivec (12);
+ break;
+ case 2:
+ async = getivec (11);
+ break;
+ default:
+ return 0;
+ }
+
+ if (!async)
+ {
+ error("GDB can not connect to asynctsr program, check that it is installed\n\
and that serial I/O is not being redirected (perhaps by NFS)\n\n\
example configuration:\n\
C> mode com2:9600,n,8,1,p\n\
C> asynctsr 2\n\
C> gdb \n");
- }
+ }
+
iov = async->iov;
outportb(com_ier, 0x0f);
outportb(com_bfr, 0x03);
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;
+ return 1;
}
-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;
+
+ return len;
}
-int
-dosasync_write(int fd, const char *buffer, int length)
+static int
+dosasync_write(fd, buf, len)
+ int fd;
+ const char *buf;
+ int len;
{
- int l = length;
+ int l = len;
+
while (l--)
- dos_async_tx(*buffer++);
- return length;
+ dos_async_tx (*buf++);
+
+ return len;
}
+static int
+go32_open (scb, name)
+ serial_t scb;
+ const char *name;
+{
+ int port;
+
+ if (strncasecmp (name, "com", 3) != 0)
+ {
+ errno = ENOENT;
+ return -1;
+ }
+ port = name[3] - '0';
-char *
-strlwr(char *s)
-{
- char *p = s;
- while (*s)
- {
- if ((*s >= 'A') && (*s <= 'Z'))
- *s += 'a'-'A';
- s++;
- }
- return p;
+ if ((port != 1) && (port != 2))
+ {
+ errno = ENOENT;
+ return -11;
+ }
+
+ scb->fd = dos_async_init(port);
+ if (!scb->fd)
+ return -1;
+
+ return 0;
}
-sigsetmask()
+static void
+go32_raw (scb)
+ serial_t scb;
{
+ /* Always in raw mode */
}
-\f
-const char *
-serial_default_name ()
+
+static int
+go32_readchar (scb, timeout)
+ serial_t scb;
+ int timeout;
{
- return "com1";
+ char buf;
+
+ if (dosasync_read(scb->fd, &buf, 1, timeout))
+ return buf;
+ else
+ return SERIAL_TIMEOUT;
}
+/* go32_{get set}_tty_state() are both dummys to fill out the function
+ vector. Someday, they may do something real... */
-void
-serial_raw (fd, old)
-int fd;
-struct ttystate *old;
+static serial_ttystate
+go32_get_tty_state(scb)
+ serial_t scb;
{
- /* Always in raw mode */
-}
+ struct go32_ttystate *state;
+ state = (struct go32_ttystate *)xmalloc(sizeof *state);
-int
-serial_open (name)
- const char *name;
-{
- fd = dos_async_init();
- if (fd) return 1;
- return 0;
+ return (serial_ttystate)state;
}
-int
-serial_readchar (to)
- int to;
+static int
+go32_set_tty_state(scb, ttystate)
+ serial_t scb;
+ serial_ttystate ttystate;
{
- char buf;
- if (dosasync_read(fd, &buf, 1, to))
- return buf;
- else
- return -2; /* Timeout, I guess */
+ struct go32_ttystate *state;
+
+ return 0;
}
-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);
+
return 0;
}
-int
-serial_write (str, len)
- const char *str;
- int len;
+static void
+go32_close (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_get_tty_state,
+ go32_set_tty_state,
+ go32_setbaudrate
+};
+
+_initialize_ser_go32 ()
{
+ serial_add_interface (&go32_ops);
}
projects / deliverable / binutils-gdb.git / blobdiff