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-rw-r--r--sim/common/hw-ports.c339
1 files changed, 339 insertions, 0 deletions
diff --git a/sim/common/hw-ports.c b/sim/common/hw-ports.c
new file mode 100644
index 0000000..b7dc985
--- /dev/null
+++ b/sim/common/hw-ports.c
@@ -0,0 +1,339 @@
+/* Hardware ports.
+ Copyright (C) 1998 Free Software Foundation, Inc.
+ Contributed by Andrew Cagney and Cygnus Solutions.
+
+This file is part of GDB, the GNU debugger.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+
+#include "hw-main.h"
+#include "hw-base.h"
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#endif
+
+#include <ctype.h>
+
+#define TRACE(x,y)
+
+
+struct hw_port_edge {
+ int my_port;
+ struct hw *dest;
+ int dest_port;
+ struct hw_port_edge *next;
+ object_disposition disposition;
+};
+
+struct hw_port_data {
+ hw_port_event_method *to_port_event;
+ const struct hw_port_descriptor *ports;
+ struct hw_port_edge *edges;
+};
+
+const struct hw_port_descriptor empty_hw_ports[] = {
+ { NULL, },
+};
+
+static void
+panic_hw_port_event (struct hw *me,
+ int my_port,
+ struct hw *source,
+ int source_port,
+ int level)
+{
+ hw_abort (me, "no port method");
+}
+
+void
+create_hw_port_data (struct hw *me)
+{
+ me->ports_of_hw = HW_ZALLOC (me, struct hw_port_data);
+ set_hw_port_event (me, panic_hw_port_event);
+ set_hw_ports (me, empty_hw_ports);
+}
+
+void
+delete_hw_port_data (struct hw *me)
+{
+ hw_free (me, me->ports_of_hw);
+ me->ports_of_hw = NULL;
+}
+
+void
+set_hw_ports (struct hw *me,
+ const struct hw_port_descriptor ports[])
+{
+ me->ports_of_hw->ports = ports;
+}
+
+void
+set_hw_port_event (struct hw *me,
+ hw_port_event_method *port_event)
+{
+ me->ports_of_hw->to_port_event = port_event;
+}
+
+
+static void
+attach_hw_port_edge (struct hw *me,
+ struct hw_port_edge **list,
+ int my_port,
+ struct hw *dest,
+ int dest_port,
+ object_disposition disposition)
+{
+ struct hw_port_edge *new_edge = HW_ZALLOC (me, struct hw_port_edge);
+ new_edge->my_port = my_port;
+ new_edge->dest = dest;
+ new_edge->dest_port = dest_port;
+ new_edge->next = *list;
+ new_edge->disposition = disposition;
+ *list = new_edge;
+}
+
+
+static void
+detach_hw_port_edge (struct hw *me,
+ struct hw_port_edge **list,
+ int my_port,
+ struct hw *dest,
+ int dest_port)
+{
+ while (*list != NULL)
+ {
+ struct hw_port_edge *old_edge = *list;
+ if (old_edge->dest == dest
+ && old_edge->dest_port == dest_port
+ && old_edge->my_port == my_port)
+ {
+ if (old_edge->disposition == permenant_object)
+ hw_abort (me, "attempt to delete permenant port edge");
+ *list = old_edge->next;
+ hw_free (me, old_edge);
+ return;
+ }
+ }
+ hw_abort (me, "attempt to delete unattached port");
+}
+
+
+#if 0
+static void
+clean_hw_port_edges (struct hw_port_edge **list)
+{
+ while (*list != NULL)
+ {
+ struct hw_port_edge *old_edge = *list;
+ switch (old_edge->disposition)
+ {
+ case permenant_object:
+ list = &old_edge->next;
+ break;
+ case temporary_object:
+ *list = old_edge->next;
+ hw_free (me, old_edge);
+ break;
+ }
+ }
+}
+#endif
+
+
+/* Ports: */
+
+void
+hw_port_event (struct hw *me,
+ int my_port,
+ int level)
+{
+ int found_an_edge = 0;
+ struct hw_port_edge *edge;
+ /* device's lines directly connected */
+ for (edge = me->ports_of_hw->edges;
+ edge != NULL;
+ edge = edge->next)
+ {
+ if (edge->my_port == my_port)
+ {
+ edge->dest->ports_of_hw->to_port_event (edge->dest,
+ edge->dest_port,
+ me,
+ my_port,
+ level);
+ found_an_edge = 1;
+ }
+ }
+ if (!found_an_edge)
+ hw_abort (me, "No edge for port %d", my_port);
+}
+
+
+void
+hw_port_attach (struct hw *me,
+ int my_port,
+ struct hw *dest,
+ int dest_port,
+ object_disposition disposition)
+{
+ attach_hw_port_edge (me,
+ &me->ports_of_hw->edges,
+ my_port,
+ dest,
+ dest_port,
+ disposition);
+}
+
+
+void
+hw_port_detach (struct hw *me,
+ int my_port,
+ struct hw *dest,
+ int dest_port)
+{
+ detach_hw_port_edge (me,
+ &me->ports_of_hw->edges,
+ my_port,
+ dest,
+ dest_port);
+}
+
+
+void
+hw_port_traverse (struct hw *me,
+ hw_port_traverse_function *handler,
+ void *data)
+{
+ struct hw_port_edge *port_edge;
+ for (port_edge = me->ports_of_hw->edges;
+ port_edge != NULL;
+ port_edge = port_edge->next)
+ {
+ handler (me, port_edge->my_port,
+ port_edge->dest, port_edge->dest_port,
+ data);
+ }
+}
+
+
+int
+hw_port_decode (struct hw *me,
+ const char *port_name,
+ port_direction direction)
+{
+ if (port_name == NULL || port_name[0] == '\0')
+ return 0;
+ if (isdigit(port_name[0]))
+ {
+ return strtoul (port_name, NULL, 0);
+ }
+ else
+ {
+ const struct hw_port_descriptor *ports =
+ me->ports_of_hw->ports;
+ if (ports != NULL)
+ {
+ while (ports->name != NULL)
+ {
+ if (ports->direction == bidirect_port
+ || ports->direction == direction)
+ {
+ if (ports->nr_ports > 0)
+ {
+ int len = strlen (ports->name);
+ if (strncmp (port_name, ports->name, len) == 0)
+ {
+ if (port_name[len] == '\0')
+ return ports->number;
+ else if(isdigit (port_name[len]))
+ {
+ int port = (ports->number
+ + strtoul (&port_name[len], NULL, 0));
+ if (port >= ports->number + ports->nr_ports)
+ hw_abort (me,
+ "Port %s out of range",
+ port_name);
+ return port;
+ }
+ }
+ }
+ else if (strcmp (port_name, ports->name) == 0)
+ return ports->number;
+ }
+ ports++;
+ }
+ }
+ }
+ hw_abort (me, "Unreconized port %s", port_name);
+ return 0;
+}
+
+
+int
+hw_port_encode (struct hw *me,
+ int port_number,
+ char *buf,
+ int sizeof_buf,
+ port_direction direction)
+{
+ const struct hw_port_descriptor *ports = NULL;
+ ports = me->ports_of_hw->ports;
+ if (ports != NULL) {
+ while (ports->name != NULL)
+ {
+ if (ports->direction == bidirect_port
+ || ports->direction == direction)
+ {
+ if (ports->nr_ports > 0)
+ {
+ if (port_number >= ports->number
+ && port_number < ports->number + ports->nr_ports)
+ {
+ strcpy (buf, ports->name);
+ sprintf (buf + strlen(buf), "%d", port_number - ports->number);
+ if (strlen (buf) >= sizeof_buf)
+ hw_abort (me, "hw_port_encode: buffer overflow");
+ return strlen (buf);
+ }
+ }
+ else
+ {
+ if (ports->number == port_number)
+ {
+ if (strlen(ports->name) >= sizeof_buf)
+ hw_abort (me, "hw_port_encode: buffer overflow");
+ strcpy(buf, ports->name);
+ return strlen(buf);
+ }
+ }
+ }
+ ports++;
+ }
+ }
+ sprintf (buf, "%d", port_number);
+ if (strlen(buf) >= sizeof_buf)
+ hw_abort (me, "hw_port_encode: buffer overflow");
+ return strlen(buf);
+}
generated by cgit v1.1 at 2024-12-11 12:24:23 +0000