1 files changed, 108 insertions, 0 deletions
diff --git a/sim/m32r/devices.c b/sim/m32r/devices.c
new file mode 100644
index 0000000..d706869
--- /dev/null
+++ b/sim/m32r/devices.c
@@ -0,0 +1,108 @@
+/* m32r device support
+   Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+   Contributed by 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 "sim-main.h"
+
+#ifdef HAVE_DV_SOCKSER
+#include "dv-sockser.h"
+#endif
+
+/* Handling the MSPR register is done by creating a device in the core
+   mapping that winds up here.  */
+
+device m32r_devices;
+
+int
+device_io_read_buffer (device *me, void *source, int space,
+		       address_word addr, unsigned nr_bytes,
+		       SIM_CPU *cpu, sim_cia cia)
+{
+  SIM_DESC sd = CPU_STATE (cpu);
+
+  if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
+    return nr_bytes;
+
+#ifdef HAVE_DV_SOCKSER
+  if (addr == UART_INCHAR_ADDR)
+    {
+      int c = dv_sockser_read (sd);
+      if (c == -1)
+	return 0;
+      *(char *) source = c;
+      return 1;
+    }
+  if (addr == UART_STATUS_ADDR)
+    {
+      int status = dv_sockser_status (sd);
+      unsigned char *p = source;
+      p[0] = 0;
+      p[1] = (((status & DV_SOCKSER_INPUT_EMPTY)
+#ifdef UART_INPUT_READY0
+	       ? UART_INPUT_READY : 0)
+#else
+	       ? 0 : UART_INPUT_READY)
+#endif
+	      + ((status & DV_SOCKSER_OUTPUT_EMPTY) ? UART_OUTPUT_READY : 0));
+      return 2;
+    }
+#endif
+
+  return nr_bytes;
+}
+
+int
+device_io_write_buffer (device *me, const void *source, int space,
+			address_word addr, unsigned nr_bytes,
+			SIM_CPU *cpu, sim_cia cia)
+{
+  SIM_DESC sd = CPU_STATE (cpu);
+
+#if WITH_SCACHE
+  /* MSPR support is deprecated but is kept in for upward compatibility
+     with existing overlay support.  */
+  if (addr == MSPR_ADDR)
+    {
+      if ((*(const char *) source & MSPR_PURGE) != 0)
+	scache_flush (sd);
+      return nr_bytes;
+    }
+  if (addr == MCCR_ADDR)
+    {
+      if ((*(const char *) source & MCCR_CP) != 0)
+	scache_flush (sd);
+      return nr_bytes;
+    }
+#endif
+
+  if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
+    return nr_bytes;
+
+#ifdef HAVE_DV_SOCKSER
+  if (addr == UART_OUTCHAR_ADDR)
+    {
+      int rc = dv_sockser_write (sd, *(char *) source);
+      return rc == 1;
+    }
+#endif
+
+  return nr_bytes;
+}
+
+void device_error () {}