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Initial creation of sourceware repository
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Stan Shebs
@ -1,157 +0,0 @@
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/* This file is part of the program psim.
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Copyright (C) 1994-1998, Andrew Cagney <cagney@highland.com.au>
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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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef HW_INSTANCES_H
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#define HW_INSTANCES_H
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/* Instances:
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As with IEEE1275, a device can be opened, creating an instance.
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Instances provide more abstract interfaces to the underlying
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hardware. For example, the instance methods for a disk may include
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code that is able to interpret file systems found on disks. Such
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methods would there for allow the manipulation of files on the
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disks file system. The operations would be implemented using the
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basic block I/O model provided by the disk.
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This model includes methods that faciliate the creation of device
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instance and (should a given device support it) standard operations
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on those instances.
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*/
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struct hw_instance;
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typedef void (hw_finish_instance_method)
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(struct hw *hw,
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struct hw_instance *);
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extern void set_hw_finish_instance
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(struct hw *hw,
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hw_finish_instance_method *method);
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/* construct an instance of the hardware */
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struct hw_instance *hw_instance_create
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(struct hw *hw,
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struct hw_instance *parent,
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const char *path,
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const char *args);
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struct hw_instance *hw_instance_interceed
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(struct hw_instance *parent,
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const char *path,
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const char *args);
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void hw_instance_delete
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(struct hw_instance *instance);
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/* methods applied to an instance of the hw */
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typedef int (hw_instance_read_method)
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(struct hw_instance *instance,
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void *addr,
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unsigned_cell len);
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#define hw_instance_read(instance, addr, len) \
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((instance)->to_instance_read ((instance), (addr), (len)))
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#define set_hw_instance_read(instance, method) \
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((instance)->to_instance_read = (method))
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typedef int (hw_instance_write_method)
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(struct hw_instance *instance,
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const void *addr,
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unsigned_cell len);
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#define hw_instance_write(instance, addr, len) \
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((instance)->to_instance_write ((instance), (addr), (len)))
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#define set_hw_instance_write(instance, method) \
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((instance)->to_instance_write = (method))
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typedef int (hw_instance_seek_method)
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(struct hw_instance *instance,
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unsigned_cell pos_hi,
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unsigned_cell pos_lo);
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#define hw_instance_seek(instance, pos_hi, pos_lo) \
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((instance)->to_instance_seek ((instance), (pos_hi), (pos_lo)));
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#define set_hw_instance_seek(instance, method) \
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((instance)->to_instance_seek = (method))
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int hw_instance_call_method
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(struct hw_instance *instance,
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const char *method,
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int n_stack_args,
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unsigned_cell stack_args[/*n_stack_args + 1(NULL)*/],
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int n_stack_returns,
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unsigned_cell stack_returns[/*n_stack_returns + 1(NULL)*/]);
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/* the definition of the instance */
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#define hw_instance_hw(instance) ((instance)->hw_of_instance + 0)
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#define hw_instance_path(instance) ((instance)->path_of_instance + 0)
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#define hw_instance_args(instance) ((instance)->args_of_instance)
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#define hw_instance_data(instance) ((instance)->data_of_instance)
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#define hw_instance_system(instance) (hw_system (hw_instance_hw (instance)))
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/* Finally an instance of a hardware device - keep your grubby little
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mits off of these internals! :-) */
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struct hw_instance {
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void *data_of_instance;
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char *args_of_instance;
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char *path_of_instance;
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/* the device that owns the instance */
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struct hw *hw_of_instance;
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struct hw_instance *sibling_of_instance;
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/* interposed instance */
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struct hw_instance *parent_of_instance;
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struct hw_instance *child_of_instance;
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/* methods */
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hw_instance_read_method *to_instance_read;
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hw_instance_write_method *to_instance_write;
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hw_instance_seek_method *to_instance_seek;
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};
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#endif
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