1/* m32r device support
2   Copyright (C) 1997, 1998, 2007, 2008, 2009, 2010, 2011
3   Free Software Foundation, Inc.
4   Contributed by Cygnus Solutions.
5
6This file is part of GDB, the GNU debugger.
7
8This program is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 3 of the License, or
11(at your option) any later version.
12
13This program is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
20
21#include "sim-main.h"
22
23#ifdef HAVE_DV_SOCKSER
24#include "dv-sockser.h"
25#endif
26
27/* Handling the MSPR register is done by creating a device in the core
28   mapping that winds up here.  */
29
30device m32r_devices;
31
32int
33device_io_read_buffer (device *me, void *source, int space,
34		       address_word addr, unsigned nr_bytes,
35		       SIM_DESC sd, SIM_CPU *cpu, sim_cia cia)
36{
37  if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
38    return nr_bytes;
39
40#ifdef HAVE_DV_SOCKSER
41  if (addr == UART_INCHAR_ADDR)
42    {
43      int c = dv_sockser_read (sd);
44      if (c == -1)
45	return 0;
46      *(char *) source = c;
47      return 1;
48    }
49  if (addr == UART_STATUS_ADDR)
50    {
51      int status = dv_sockser_status (sd);
52      unsigned char *p = source;
53      p[0] = 0;
54      p[1] = (((status & DV_SOCKSER_INPUT_EMPTY)
55#ifdef UART_INPUT_READY0
56	       ? UART_INPUT_READY : 0)
57#else
58	       ? 0 : UART_INPUT_READY)
59#endif
60	      + ((status & DV_SOCKSER_OUTPUT_EMPTY) ? UART_OUTPUT_READY : 0));
61      return 2;
62    }
63#endif
64
65  return nr_bytes;
66}
67
68int
69device_io_write_buffer (device *me, const void *source, int space,
70			address_word addr, unsigned nr_bytes,
71			SIM_DESC sd, SIM_CPU *cpu, sim_cia cia)
72{
73#if WITH_SCACHE
74  /* MSPR support is deprecated but is kept in for upward compatibility
75     with existing overlay support.  */
76  if (addr == MSPR_ADDR)
77    {
78      if ((*(const char *) source & MSPR_PURGE) != 0)
79	scache_flush (sd);
80      return nr_bytes;
81    }
82  if (addr == MCCR_ADDR)
83    {
84      if ((*(const char *) source & MCCR_CP) != 0)
85	scache_flush (sd);
86      return nr_bytes;
87    }
88#endif
89
90  if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
91    return nr_bytes;
92
93#ifdef HAVE_DV_SOCKSER
94  if (addr == UART_OUTCHAR_ADDR)
95    {
96      int rc = dv_sockser_write (sd, *(char *) source);
97      return rc == 1;
98    }
99#endif
100
101  return nr_bytes;
102}
103
104void
105device_error (device *me, const char *message, ...)
106{
107}
108