1/* m32r device support
2   Copyright (C) 1997, 1998, 2007 Free Software Foundation, Inc.
3   Contributed by Cygnus Solutions.
4
5This file is part of GDB, the GNU debugger.
6
7This program is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 3 of the License, or
10(at your option) any later version.
11
12This program is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
19
20#include "sim-main.h"
21
22#ifdef HAVE_DV_SOCKSER
23#include "dv-sockser.h"
24#endif
25
26/* Handling the MSPR register is done by creating a device in the core
27   mapping that winds up here.  */
28
29device m32r_devices;
30
31int
32device_io_read_buffer (device *me, void *source, int space,
33		       address_word addr, unsigned nr_bytes,
34		       SIM_DESC sd, SIM_CPU *cpu, sim_cia cia)
35{
36  if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
37    return nr_bytes;
38
39#ifdef HAVE_DV_SOCKSER
40  if (addr == UART_INCHAR_ADDR)
41    {
42      int c = dv_sockser_read (sd);
43      if (c == -1)
44	return 0;
45      *(char *) source = c;
46      return 1;
47    }
48  if (addr == UART_STATUS_ADDR)
49    {
50      int status = dv_sockser_status (sd);
51      unsigned char *p = source;
52      p[0] = 0;
53      p[1] = (((status & DV_SOCKSER_INPUT_EMPTY)
54#ifdef UART_INPUT_READY0
55	       ? UART_INPUT_READY : 0)
56#else
57	       ? 0 : UART_INPUT_READY)
58#endif
59	      + ((status & DV_SOCKSER_OUTPUT_EMPTY) ? UART_OUTPUT_READY : 0));
60      return 2;
61    }
62#endif
63
64  return nr_bytes;
65}
66
67int
68device_io_write_buffer (device *me, const void *source, int space,
69			address_word addr, unsigned nr_bytes,
70			SIM_DESC sd, SIM_CPU *cpu, sim_cia cia)
71{
72#if WITH_SCACHE
73  /* MSPR support is deprecated but is kept in for upward compatibility
74     with existing overlay support.  */
75  if (addr == MSPR_ADDR)
76    {
77      if ((*(const char *) source & MSPR_PURGE) != 0)
78	scache_flush (sd);
79      return nr_bytes;
80    }
81  if (addr == MCCR_ADDR)
82    {
83      if ((*(const char *) source & MCCR_CP) != 0)
84	scache_flush (sd);
85      return nr_bytes;
86    }
87#endif
88
89  if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
90    return nr_bytes;
91
92#ifdef HAVE_DV_SOCKSER
93  if (addr == UART_OUTCHAR_ADDR)
94    {
95      int rc = dv_sockser_write (sd, *(char *) source);
96      return rc == 1;
97    }
98#endif
99
100  return nr_bytes;
101}
102
103void
104device_error (device *me, char *message, ...)
105{
106}
107