631 lines
14 KiB
C
631 lines
14 KiB
C
/* 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 _DEVICE_H_
|
|
#define _DEVICE_H_
|
|
|
|
#ifndef INLINE_DEVICE
|
|
#define INLINE_DEVICE
|
|
#endif
|
|
|
|
/* declared in basics.h, this object is used everywhere */
|
|
/* typedef struct _device device; */
|
|
|
|
|
|
/* Introduction:
|
|
|
|
As explained in earlier sections, the device, device instance,
|
|
property and interrupts lie at the heart of PSIM's device model.
|
|
|
|
In the below a synopsis of the device object and the operations it
|
|
supports are given. Details of this object can be found in the
|
|
files <<device.h>> and <<device.c>>.
|
|
|
|
*/
|
|
|
|
|
|
/* Constructing the device tree:
|
|
|
|
The initial device tree populated with devices and basic properties
|
|
is created using the function <<device_tree_add_parsed()>>. This
|
|
function parses a PSIM device specification and uses it to populate
|
|
the tree accordingly.
|
|
|
|
This function accepts a printf style formatted string as the
|
|
argument that describes the entry. Any properties or interrupt
|
|
connections added to a device tree using this function are marked
|
|
as having a permenant disposition. When the tree is (re)
|
|
initialized they will be restored to their initial value.
|
|
|
|
*/
|
|
|
|
EXTERN_DEVICE\
|
|
(device *) device_tree_add_parsed
|
|
(device *current,
|
|
const char *fmt,
|
|
...) __attribute__ ((format (printf, 2, 3)));
|
|
|
|
|
|
/* Initializing the created tree:
|
|
|
|
Once a device tree has been created the <<device_tree_init()>>
|
|
function is used to initialize it. The exact sequence of events
|
|
that occure during initialization are described separatly.
|
|
|
|
*/
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_tree_init
|
|
(device *root,
|
|
psim *system);
|
|
|
|
|
|
/* Relationships:
|
|
|
|
A device is able to determine its relationship to other devices
|
|
within the tree. Operations include querying for a devices parent,
|
|
sibling, child, name, and path (from the root).
|
|
|
|
*/
|
|
|
|
INLINE_DEVICE\
|
|
(device *) device_parent
|
|
(device *me);
|
|
|
|
INLINE_DEVICE\
|
|
(device *) device_sibling
|
|
(device *me);
|
|
|
|
INLINE_DEVICE\
|
|
(device *) device_child
|
|
(device *me);
|
|
|
|
INLINE_DEVICE\
|
|
(const char *) device_name
|
|
(device *me);
|
|
|
|
INLINE_DEVICE\
|
|
(const char *) device_path
|
|
(device *me);
|
|
|
|
INLINE_DEVICE\
|
|
(void *) device_data
|
|
(device *me);
|
|
|
|
INLINE_DEVICE\
|
|
(psim *) device_system
|
|
(device *me);
|
|
|
|
typedef struct _device_unit {
|
|
int nr_cells;
|
|
unsigned32 cells[4]; /* unused cells are zero */
|
|
} device_unit;
|
|
|
|
INLINE_DEVICE\
|
|
(const device_unit *) device_unit_address
|
|
(device *me);
|
|
|
|
|
|
/* Properties:
|
|
|
|
Attached to a device are a number of properties. Each property has
|
|
a size and type (both of which can be queried). A device is able
|
|
to iterate over or query and set a properties value.
|
|
|
|
*/
|
|
|
|
/* The following are valid property types. The property `array' is a
|
|
for generic untyped data. */
|
|
|
|
typedef enum {
|
|
array_property,
|
|
boolean_property,
|
|
ihandle_property,
|
|
integer_property,
|
|
string_property,
|
|
} device_property_type;
|
|
|
|
typedef struct _device_property device_property;
|
|
struct _device_property {
|
|
device *owner;
|
|
const char *name;
|
|
device_property_type type;
|
|
unsigned sizeof_array;
|
|
const void *array;
|
|
const device_property *original;
|
|
object_disposition disposition;
|
|
};
|
|
|
|
|
|
/* iterate through the properties attached to a device */
|
|
|
|
INLINE_DEVICE\
|
|
(const device_property *) device_next_property
|
|
(const device_property *previous);
|
|
|
|
INLINE_DEVICE\
|
|
(const device_property *) device_find_property
|
|
(device *me,
|
|
const char *property); /* NULL for first property */
|
|
|
|
|
|
/* Manipulate the properties belonging to a given device.
|
|
|
|
SET on the other hand will force the properties value. The
|
|
simulation is aborted if the property was present but of a
|
|
conflicting type.
|
|
|
|
FIND returns the specified properties value, aborting the
|
|
simulation if the property is missing. Code locating a property
|
|
should first check its type (using device_find_property above) and
|
|
then obtain its value using the below. */
|
|
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_set_array_property
|
|
(device *me,
|
|
const char *property,
|
|
const void *array,
|
|
int sizeof_array);
|
|
|
|
INLINE_DEVICE\
|
|
(const device_property *) device_find_array_property
|
|
(device *me,
|
|
const char *property);
|
|
|
|
|
|
#if 0
|
|
INLINE_DEVICE\
|
|
(void) device_set_boolean_property
|
|
(device *me,
|
|
const char *property,
|
|
int bool);
|
|
#endif
|
|
|
|
INLINE_DEVICE\
|
|
(int) device_find_boolean_property
|
|
(device *me,
|
|
const char *property);
|
|
|
|
|
|
#if 0
|
|
INLINE_DEVICE\
|
|
(void) device_set_ihandle_property
|
|
(device *me,
|
|
const char *property,
|
|
device_instance *ihandle);
|
|
#endif
|
|
|
|
INLINE_DEVICE\
|
|
(device_instance *) device_find_ihandle_property
|
|
(device *me,
|
|
const char *property);
|
|
|
|
|
|
#if 0
|
|
INLINE_DEVICE\
|
|
(void) device_set_integer_property
|
|
(device *me,
|
|
const char *property,
|
|
signed_word integer);
|
|
#endif
|
|
|
|
INLINE_DEVICE\
|
|
(signed_word) device_find_integer_property
|
|
(device *me,
|
|
const char *property);
|
|
|
|
|
|
#if 0
|
|
INLINE_DEVICE\
|
|
(void) device_set_string_property
|
|
(device *me,
|
|
const char *property,
|
|
const char *string);
|
|
#endif
|
|
|
|
INLINE_DEVICE\
|
|
(const char *) device_find_string_property
|
|
(device *me,
|
|
const char *property);
|
|
|
|
|
|
/* 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.
|
|
|
|
*/
|
|
|
|
typedef struct _device_instance_callbacks device_instance_callbacks;
|
|
|
|
INLINE_DEVICE\
|
|
(device_instance *) device_create_instance_from
|
|
(device *me, /*OR*/ device_instance *parent,
|
|
void *data,
|
|
const char *path,
|
|
const char *args,
|
|
const device_instance_callbacks *callbacks);
|
|
|
|
INLINE_DEVICE\
|
|
(device_instance *) device_create_instance
|
|
(device *me,
|
|
const char *device_specifier);
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_instance_delete
|
|
(device_instance *instance);
|
|
|
|
INLINE_DEVICE\
|
|
(int) device_instance_read
|
|
(device_instance *instance,
|
|
void *addr,
|
|
unsigned_word len);
|
|
|
|
INLINE_DEVICE\
|
|
(int) device_instance_write
|
|
(device_instance *instance,
|
|
const void *addr,
|
|
unsigned_word len);
|
|
|
|
INLINE_DEVICE\
|
|
(int) device_instance_seek
|
|
(device_instance *instance,
|
|
unsigned_word pos_hi,
|
|
unsigned_word pos_lo);
|
|
|
|
INLINE_DEVICE\
|
|
(unsigned_word) device_instance_claim
|
|
(device_instance *instance,
|
|
unsigned_word address,
|
|
unsigned_word length,
|
|
unsigned_word alignment);
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_instance_release
|
|
(device_instance *instance,
|
|
unsigned_word address,
|
|
unsigned_word length);
|
|
|
|
INLINE_DEVICE\
|
|
(device *) device_instance_device
|
|
(device_instance *instance);
|
|
|
|
INLINE_DEVICE\
|
|
(const char *) device_instance_path
|
|
(device_instance *instance);
|
|
|
|
INLINE_DEVICE\
|
|
(void *) device_instance_data
|
|
(device_instance *instance);
|
|
|
|
|
|
/* Interrupts:
|
|
|
|
*/
|
|
|
|
/* Interrupt Source
|
|
|
|
A device drives its interrupt line using the call
|
|
|
|
*/
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_interrupt_event
|
|
(device *me,
|
|
int my_port,
|
|
int value,
|
|
cpu *processor,
|
|
unsigned_word cia);
|
|
|
|
/* This interrupt event will then be propogated to any attached
|
|
interrupt destinations.
|
|
|
|
Any interpretation of PORT and VALUE is model dependant. However
|
|
as guidelines the following are recommended: PCI interrupts a-d
|
|
correspond to lines 0-3; level sensative interrupts be requested
|
|
with a value of one and withdrawn with a value of 0; edge sensative
|
|
interrupts always have a value of 1, the event its self is treated
|
|
as the interrupt.
|
|
|
|
|
|
Interrupt Destinations
|
|
|
|
Attached to each interrupt line of a device can be zero or more
|
|
desitinations. These destinations consist of a device/port pair.
|
|
A destination is attached/detached to a device line using the
|
|
attach and detach calls. */
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_interrupt_attach
|
|
(device *me,
|
|
int my_port,
|
|
device *dest,
|
|
int dest_port,
|
|
object_disposition disposition);
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_interrupt_detach
|
|
(device *me,
|
|
int my_port,
|
|
device *dest,
|
|
int dest_port);
|
|
|
|
/* DESTINATION is attached (detached) to LINE of the device ME
|
|
|
|
|
|
Interrupt conversion
|
|
|
|
Users refer to interrupt port numbers symbolically. For instance a
|
|
device may refer to its `INT' signal which is internally
|
|
represented by port 3.
|
|
|
|
To convert to/from the symbolic and internal representation of a
|
|
port name/number. The following functions are available. */
|
|
|
|
INLINE_DEVICE\
|
|
(int) device_interrupt_decode
|
|
(device *me,
|
|
const char *symbolic_name);
|
|
|
|
INLINE_DEVICE\
|
|
(int) device_interrupt_encode
|
|
(device *me,
|
|
int port_number,
|
|
char *buf,
|
|
int sizeof_buf);
|
|
|
|
|
|
/* Hardware operations:
|
|
|
|
*/
|
|
|
|
INLINE_DEVICE\
|
|
(unsigned) device_io_read_buffer
|
|
(device *me,
|
|
void *dest,
|
|
int space,
|
|
unsigned_word addr,
|
|
unsigned nr_bytes,
|
|
cpu *processor,
|
|
unsigned_word cia);
|
|
|
|
INLINE_DEVICE\
|
|
(unsigned) device_io_write_buffer
|
|
(device *me,
|
|
const void *source,
|
|
int space,
|
|
unsigned_word addr,
|
|
unsigned nr_bytes,
|
|
cpu *processor,
|
|
unsigned_word cia);
|
|
|
|
|
|
/* Conversly, the device pci1000,1@1 my need to perform a dma transfer
|
|
into the cpu/memory core. Just as I/O moves towards the leaves,
|
|
dma transfers move towards the core via the initiating devices
|
|
parent nodes. The root device (special) converts the DMA transfer
|
|
into reads/writes to memory */
|
|
|
|
INLINE_DEVICE\
|
|
(unsigned) device_dma_read_buffer
|
|
(device *me,
|
|
void *dest,
|
|
int space,
|
|
unsigned_word addr,
|
|
unsigned nr_bytes);
|
|
|
|
INLINE_DEVICE\
|
|
(unsigned) device_dma_write_buffer
|
|
(device *me,
|
|
const void *source,
|
|
int space,
|
|
unsigned_word addr,
|
|
unsigned nr_bytes,
|
|
int violate_read_only_section);
|
|
|
|
/* To avoid the need for an intermediate (bridging) node to ask each
|
|
of its child devices in turn if an IO access is intended for them,
|
|
parent nodes maintain a table mapping addresses directly to
|
|
specific devices. When a device is `connected' to its bus it
|
|
attaches its self to its parent. */
|
|
|
|
/* Address access attributes */
|
|
typedef enum _access_type {
|
|
access_invalid = 0,
|
|
access_read = 1,
|
|
access_write = 2,
|
|
access_read_write = 3,
|
|
access_exec = 4,
|
|
access_read_exec = 5,
|
|
access_write_exec = 6,
|
|
access_read_write_exec = 7,
|
|
} access_type;
|
|
|
|
/* Address attachement types */
|
|
typedef enum _attach_type {
|
|
attach_invalid,
|
|
attach_raw_memory,
|
|
attach_callback,
|
|
/* ... */
|
|
} attach_type;
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_attach_address
|
|
(device *me,
|
|
const char *name,
|
|
attach_type attach,
|
|
int space,
|
|
unsigned_word addr,
|
|
unsigned nr_bytes,
|
|
access_type access,
|
|
device *who); /*callback/default*/
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_detach_address
|
|
(device *me,
|
|
const char *name,
|
|
attach_type attach,
|
|
int space,
|
|
unsigned_word addr,
|
|
unsigned nr_bytes,
|
|
access_type access,
|
|
device *who); /*callback/default*/
|
|
|
|
/* Utilities:
|
|
|
|
*/
|
|
|
|
/* IOCTL::
|
|
|
|
Often devices require `out of band' operations to be performed.
|
|
For instance a pal device may need to notify a PCI bridge device
|
|
that an interrupt ack cycle needs to be performed on the PCI bus.
|
|
Within PSIM such operations are performed by using the generic
|
|
ioctl call <<device_ioctl()>>.
|
|
|
|
*/
|
|
|
|
EXTERN_DEVICE\
|
|
(int) device_ioctl
|
|
(device *me,
|
|
cpu *processor,
|
|
unsigned_word cia,
|
|
...);
|
|
|
|
|
|
/* Error reporting::
|
|
|
|
So that errors originating from devices appear in a consistent
|
|
format, the <<device_error()>> function can be used. Formats and
|
|
outputs the error message before aborting the simulation
|
|
|
|
Devices should use this function to abort the simulation except
|
|
when the abort reason leaves the simulation in a hazardous
|
|
condition (for instance a failed malloc).
|
|
|
|
*/
|
|
|
|
EXTERN_DEVICE\
|
|
(void volatile) device_error
|
|
(device *me,
|
|
const char *fmt,
|
|
...) __attribute__ ((format (printf, 2, 3)));
|
|
|
|
/* Tree traversal::
|
|
|
|
The entire device tree can be traversed using the
|
|
<<device_tree_traverse()>> function. The traversal can be in
|
|
either pre- or postfix order.
|
|
|
|
*/
|
|
|
|
typedef void (device_tree_traverse_function)
|
|
(device *device,
|
|
void *data);
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_tree_traverse
|
|
(device *root,
|
|
device_tree_traverse_function *prefix,
|
|
device_tree_traverse_function *postfix,
|
|
void *data);
|
|
|
|
/* Device description::
|
|
|
|
*/
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_tree_print_device
|
|
(device *device,
|
|
void *ignore_data_argument);
|
|
|
|
|
|
/* Tree lookup::
|
|
|
|
The function <<device_tree_find_device()>> will attempt to locate
|
|
the specified device within the tree. If the device is not found a
|
|
NULL device is returned.
|
|
|
|
*/
|
|
|
|
INLINE_DEVICE\
|
|
(device *) device_tree_find_device
|
|
(device *root,
|
|
const char *path);
|
|
|
|
|
|
/* Device list or usage::
|
|
|
|
The <<device_usage()>> function outputs a list of all the devices
|
|
compiled into PSIM. The verbose option will result in additional
|
|
information being printed (for instance, the interrupt ports).
|
|
|
|
*/
|
|
|
|
INLINE_DEVICE\
|
|
(void) device_usage
|
|
(int verbose);
|
|
|
|
|
|
/* External representation:
|
|
|
|
Both device nodes and device instances, in OpenBoot firmware have
|
|
an external representation (phandles and ihandles) and these values
|
|
are both stored in the device tree in property nodes and passed
|
|
between the client program and the simulator during emulation
|
|
calls.
|
|
|
|
To limit the potential risk associated with trusing `data' from the
|
|
client program, the following mapping operators `safely' convert
|
|
between the two representations
|
|
|
|
*/
|
|
|
|
INLINE_DEVICE\
|
|
(device *) external_to_device
|
|
(device *tree_member,
|
|
unsigned32 phandle);
|
|
|
|
INLINE_DEVICE\
|
|
(unsigned32) device_to_external
|
|
(device *me);
|
|
|
|
INLINE_DEVICE\
|
|
(device_instance *) external_to_device_instance
|
|
(device *tree_member,
|
|
unsigned32 ihandle);
|
|
|
|
INLINE_DEVICE\
|
|
(unsigned32) device_instance_to_external
|
|
(device_instance *me);
|
|
|
|
#endif /* _DEVICE_H_ */
|