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