339 lines
7.0 KiB
C
339 lines
7.0 KiB
C
/* Hardware ports.
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Copyright (C) 1998, 2007 Free Software Foundation, Inc.
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Contributed by Andrew Cagney and Cygnus Solutions.
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This file is part of GDB, the GNU debugger.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "hw-main.h"
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#include "hw-base.h"
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#endif
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#include <ctype.h>
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#define TRACE(x,y)
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struct hw_port_edge {
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int my_port;
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struct hw *dest;
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int dest_port;
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struct hw_port_edge *next;
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object_disposition disposition;
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};
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struct hw_port_data {
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hw_port_event_method *to_port_event;
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const struct hw_port_descriptor *ports;
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struct hw_port_edge *edges;
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};
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const struct hw_port_descriptor empty_hw_ports[] = {
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{ NULL, },
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};
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static void
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panic_hw_port_event (struct hw *me,
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int my_port,
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struct hw *source,
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int source_port,
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int level)
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{
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hw_abort (me, "no port method");
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}
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void
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create_hw_port_data (struct hw *me)
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{
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me->ports_of_hw = HW_ZALLOC (me, struct hw_port_data);
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set_hw_port_event (me, panic_hw_port_event);
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set_hw_ports (me, empty_hw_ports);
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}
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void
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delete_hw_port_data (struct hw *me)
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{
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hw_free (me, me->ports_of_hw);
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me->ports_of_hw = NULL;
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}
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void
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set_hw_ports (struct hw *me,
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const struct hw_port_descriptor ports[])
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{
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me->ports_of_hw->ports = ports;
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}
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void
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set_hw_port_event (struct hw *me,
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hw_port_event_method *port_event)
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{
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me->ports_of_hw->to_port_event = port_event;
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}
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static void
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attach_hw_port_edge (struct hw *me,
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struct hw_port_edge **list,
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int my_port,
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struct hw *dest,
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int dest_port,
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object_disposition disposition)
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{
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struct hw_port_edge *new_edge = HW_ZALLOC (me, struct hw_port_edge);
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new_edge->my_port = my_port;
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new_edge->dest = dest;
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new_edge->dest_port = dest_port;
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new_edge->next = *list;
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new_edge->disposition = disposition;
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*list = new_edge;
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}
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static void
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detach_hw_port_edge (struct hw *me,
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struct hw_port_edge **list,
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int my_port,
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struct hw *dest,
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int dest_port)
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{
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while (*list != NULL)
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{
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struct hw_port_edge *old_edge = *list;
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if (old_edge->dest == dest
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&& old_edge->dest_port == dest_port
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&& old_edge->my_port == my_port)
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{
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if (old_edge->disposition == permenant_object)
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hw_abort (me, "attempt to delete permenant port edge");
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*list = old_edge->next;
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hw_free (me, old_edge);
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return;
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}
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}
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hw_abort (me, "attempt to delete unattached port");
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}
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#if 0
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static void
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clean_hw_port_edges (struct hw_port_edge **list)
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{
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while (*list != NULL)
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{
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struct hw_port_edge *old_edge = *list;
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switch (old_edge->disposition)
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{
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case permenant_object:
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list = &old_edge->next;
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break;
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case temporary_object:
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*list = old_edge->next;
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hw_free (me, old_edge);
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break;
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}
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}
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}
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#endif
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/* Ports: */
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void
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hw_port_event (struct hw *me,
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int my_port,
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int level)
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{
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int found_an_edge = 0;
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struct hw_port_edge *edge;
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/* device's lines directly connected */
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for (edge = me->ports_of_hw->edges;
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edge != NULL;
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edge = edge->next)
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{
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if (edge->my_port == my_port)
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{
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edge->dest->ports_of_hw->to_port_event (edge->dest,
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edge->dest_port,
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me,
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my_port,
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level);
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found_an_edge = 1;
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}
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}
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if (!found_an_edge)
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hw_abort (me, "No edge for port %d", my_port);
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}
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void
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hw_port_attach (struct hw *me,
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int my_port,
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struct hw *dest,
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int dest_port,
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object_disposition disposition)
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{
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attach_hw_port_edge (me,
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&me->ports_of_hw->edges,
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my_port,
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dest,
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dest_port,
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disposition);
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}
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void
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hw_port_detach (struct hw *me,
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int my_port,
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struct hw *dest,
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int dest_port)
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{
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detach_hw_port_edge (me,
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&me->ports_of_hw->edges,
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my_port,
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dest,
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dest_port);
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}
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void
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hw_port_traverse (struct hw *me,
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hw_port_traverse_function *handler,
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void *data)
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{
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struct hw_port_edge *port_edge;
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for (port_edge = me->ports_of_hw->edges;
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port_edge != NULL;
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port_edge = port_edge->next)
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{
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handler (me, port_edge->my_port,
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port_edge->dest, port_edge->dest_port,
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data);
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}
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}
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int
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hw_port_decode (struct hw *me,
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const char *port_name,
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port_direction direction)
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{
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if (port_name == NULL || port_name[0] == '\0')
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return 0;
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if (isdigit(port_name[0]))
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{
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return strtoul (port_name, NULL, 0);
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}
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else
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{
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const struct hw_port_descriptor *ports =
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me->ports_of_hw->ports;
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if (ports != NULL)
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{
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while (ports->name != NULL)
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{
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if (ports->direction == bidirect_port
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|| ports->direction == direction)
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{
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if (ports->nr_ports > 0)
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{
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int len = strlen (ports->name);
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if (strncmp (port_name, ports->name, len) == 0)
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{
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if (port_name[len] == '\0')
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return ports->number;
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else if(isdigit (port_name[len]))
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{
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int port = (ports->number
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+ strtoul (&port_name[len], NULL, 0));
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if (port >= ports->number + ports->nr_ports)
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hw_abort (me,
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"Port %s out of range",
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port_name);
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return port;
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}
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}
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}
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else if (strcmp (port_name, ports->name) == 0)
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return ports->number;
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}
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ports++;
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}
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}
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}
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hw_abort (me, "Unreconized port %s", port_name);
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return 0;
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}
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int
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hw_port_encode (struct hw *me,
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int port_number,
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char *buf,
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int sizeof_buf,
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port_direction direction)
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{
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const struct hw_port_descriptor *ports = NULL;
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ports = me->ports_of_hw->ports;
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if (ports != NULL) {
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while (ports->name != NULL)
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{
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if (ports->direction == bidirect_port
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|| ports->direction == direction)
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{
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if (ports->nr_ports > 0)
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{
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if (port_number >= ports->number
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&& port_number < ports->number + ports->nr_ports)
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{
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strcpy (buf, ports->name);
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sprintf (buf + strlen(buf), "%d", port_number - ports->number);
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if (strlen (buf) >= sizeof_buf)
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hw_abort (me, "hw_port_encode: buffer overflow");
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return strlen (buf);
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}
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}
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else
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{
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if (ports->number == port_number)
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{
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if (strlen(ports->name) >= sizeof_buf)
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hw_abort (me, "hw_port_encode: buffer overflow");
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strcpy(buf, ports->name);
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return strlen(buf);
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}
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}
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}
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ports++;
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}
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}
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sprintf (buf, "%d", port_number);
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if (strlen(buf) >= sizeof_buf)
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hw_abort (me, "hw_port_encode: buffer overflow");
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return strlen(buf);
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}
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