Initial creation of sourceware repository

1 files changed, 100 insertions, 0 deletions

diff --git a/sim/ppc/hw_iobus.c b/sim/ppc/hw_iobus.c
new file mode 100644
index 0000000000..3cd138c1c8
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+++ b/sim/ppc/hw_iobus.c
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+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
+
+    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 of the License, 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.
+ 
+    */
+
+
+#ifndef _HW_IOBUS_C_
+#define _HW_IOBUS_C_
+
+#ifndef STATIC_INLINE_HW_IOBUS
+#define STATIC_INLINE_HW_IOBUS STATIC_INLINE
+#endif
+
+#include "device_table.h"
+
+
+/* DEVICE
+
+   iobus - simple bus for attaching devices
+
+   DESCRIPTION
+
+   IOBUS provides a simple `local' bus for attaching (hanging)
+   programmed IO devices from.  All child devices are directly mapped
+   into this devices parent address space (after checking that the
+   attach address lies within the <<iobus>> address range.  address).
+
+   PROPERTIES
+
+   None.
+
+   */
+
+static void
+hw_iobus_attach_address_callback(device *me,
+				 attach_type type,
+				 int space,
+				 unsigned_word addr,
+				 unsigned nr_bytes,
+				 access_type access,
+				 device *client) /*callback/default*/
+{
+  int attach_space;
+  unsigned_word attach_address;
+  /* sanity check */
+  if (space != 0)
+    device_error(me, "invalid space (%d) specified by %s",
+		 space, device_path(client));
+  /* get the bus address */
+  device_address_to_attach_address(device_parent(me),
+				   device_unit_address(me),
+				   &attach_space,
+				   &attach_address,
+				   me);
+  if (addr < attach_address)
+    device_error(me, "Invalid attach address 0x%lx", (unsigned long)addr);
+  device_attach_address(device_parent(me),
+			type,
+			attach_space,
+			addr,
+			nr_bytes,
+			access,
+			client);
+}
+
+
+static device_callbacks const hw_iobus_callbacks = {
+  { NULL, },
+  { hw_iobus_attach_address_callback, },
+  { NULL, }, /* IO */
+  { NULL, }, /* DMA */
+  { NULL, }, /* interrupt */
+  { generic_device_unit_decode,
+    generic_device_unit_encode,
+    generic_device_address_to_attach_address,
+    generic_device_size_to_attach_size }
+};
+
+
+const device_descriptor hw_iobus_device_descriptor[] = {
+  { "iobus", NULL, &hw_iobus_callbacks },
+  { NULL, },
+};
+
+#endif /* _HW_IOBUS_ */