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/*  This file is part of the program psim.

    Copyright (C) 1994-1997, 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>>.

   */

/* Device creation: */

INLINE_DEVICE\

(device *) device_create

(device *parent,

 const char *base,

 const char *name,

 const char *unit_address,

 const char *args);

INLINE_DEVICE\

(void) device_usage

(int verbose);

/* Device initialization: */

INLINE_DEVICE\

(void) device_clean

(device *root,

 void *data);

INLINE_DEVICE\

(void) device_init_static_properties

(device *me,

 void *data);

INLINE_DEVICE\

(void) device_init_address

(device *me,

 void *data);

INLINE_DEVICE\

(void) device_init_runtime_properties

(device *me,

 void *data);

INLINE_DEVICE\

(void) device_init_data

(device *me,

 void *data);

/* 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_root

(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_base

(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;

  unsigned_cell cells[4]; /* unused cells are zero */

} device_unit;

INLINE_DEVICE\

(const device_unit *) device_unit_address

(device *me);

INLINE_DEVICE\

(int) device_decode_unit

(device *bus,

 const char *unit,

 device_unit *address);

INLINE_DEVICE\

(int) device_encode_unit

(device *bus,

 const device_unit *unit_address,

 char *buf,

 int sizeof_buf);

/* Convert an Open Firmware size into a form suitable for attach

   address calls.

   Return a zero result if the address should be ignored when looking

   for attach addresses */

INLINE_DEVICE\

(int) device_address_to_attach_address

(device *me,

 const device_unit *address,

 int *attach_space,

 unsigned_word *attach_address,

 device *client);

/* Convert an Open Firmware size into a form suitable for attach

   address calls

   Return a zero result if the address should be ignored */

INLINE_DEVICE\

(int) device_size_to_attach_size

(device *me,

 const device_unit *size,

 unsigned *nr_bytes,

 device *client);

INLINE_DEVICE\

(unsigned) device_nr_address_cells

(device *me);

INLINE_DEVICE\

(unsigned) device_nr_size_cells

(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

   for generic untyped data. */

typedef enum {

  array_property,

  boolean_property,

  ihandle_property, /*runtime*/

  integer_property,

  range_array_property,

  reg_array_property,

  string_property,

  string_array_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.

   void device_add_<type>_property(device *, const char *, <type>)

   void device_add_*_array_property(device *, const char *, const <type>*, int)

   void device_set_*_property(device *, const char *, <type>)

   void device_set_*_array_property(device *, const char *, const <type>*, int)

   <type> device_find_*_property(device *, const char *)

   int device_find_*_array_property(device *, const char *, int, <type>*)

   */

INLINE_DEVICE\

(void) device_add_array_property

(device *me,

 const char *property,

 const void *array,

 int sizeof_array);

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);

INLINE_DEVICE\

(void) device_add_boolean_property

(device *me,

 const char *property,

 int bool);

INLINE_DEVICE\

(int) device_find_boolean_property

(device *me,

 const char *property);

typedef struct _ihandle_runtime_property_spec {

  const char *full_path;

} ihandle_runtime_property_spec;

INLINE_DEVICE\

(void) device_add_ihandle_runtime_property

(device *me,

 const char *property,

 const ihandle_runtime_property_spec *ihandle);

INLINE_DEVICE\

(void) device_find_ihandle_runtime_property

(device *me,

 const char *property,

 ihandle_runtime_property_spec *ihandle);

INLINE_DEVICE\

(void) device_set_ihandle_property

(device *me,

 const char *property,

 device_instance *ihandle);

INLINE_DEVICE\

(device_instance *) device_find_ihandle_property

(device *me,

 const char *property);

INLINE_DEVICE\

(void) device_add_integer_property

(device *me,

 const char *property,

 signed_cell integer);

INLINE_DEVICE\

(signed_cell) device_find_integer_property

(device *me,

 const char *property);

INLINE_DEVICE\

(int) device_find_integer_array_property

(device *me,

 const char *property,

 unsigned index,

 signed_cell *integer);

typedef struct _range_property_spec {

  device_unit child_address;

  device_unit parent_address;

  device_unit size;

} range_property_spec;

INLINE_DEVICE\

(void) device_add_range_array_property

(device *me,

 const char *property,

 const range_property_spec *ranges,

 unsigned nr_ranges);

INLINE_DEVICE\

(int) device_find_range_array_property

(device *me,

 const char *property,

 unsigned index,

 range_property_spec *range);

typedef struct _reg_property_spec {

  device_unit address;

  device_unit size;

} reg_property_spec;

INLINE_DEVICE\

(void) device_add_reg_array_property

(device *me,

 const char *property,

 const reg_property_spec *reg,

 unsigned nr_regs);

INLINE_DEVICE\

(int) device_find_reg_array_property

(device *me,

 const char *property,

 unsigned index,

 reg_property_spec *reg);

INLINE_DEVICE\

(void) device_add_string_property

(device *me,

 const char *property,

 const char *string);

INLINE_DEVICE\

(const char *) device_find_string_property

(device *me,

 const char *property);

typedef const char *string_property_spec;

INLINE_DEVICE\

(void) device_add_string_array_property

(device *me,

 const char *property,

 const string_property_spec *strings,

 unsigned nr_strings);

INLINE_DEVICE\

(int) device_find_string_array_property

(device *me,

 const char *property,

 unsigned index,

 string_property_spec *string);

INLINE_DEVICE\

(void) device_add_duplicate_property

(device *me,

 const char *property,

 const device_property *original);

/* 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 *full_path,

 const char *args);

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\

(int) device_instance_call_method

(device_instance *instance,

 const char *method,

 int n_stack_args,

 unsigned_cell stack_args[/*n_stack_args*/],

 int n_stack_returns,

 unsigned_cell stack_returns[/*n_stack_returns*/]);

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);

typedef void (device_interrupt_traverse_function)

     (device *me,

      int my_port,

      device *dest,

      int my_dest,

      void *data);

INLINE_DEVICE\

(void) device_interrupt_traverse

(device *me,

 device_interrupt_traverse_function *handler,

 void *data);

/* 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,

 port_direction direction);

INLINE_DEVICE\

(int) device_interrupt_encode

(device *me,

 int port_number,

 char *buf,

 int sizeof_buf,

 port_direction direction);

/* 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,

 attach_type attach,

 int space,

 unsigned_word addr,

 unsigned nr_bytes,

 access_type access,

 device *client); /*callback/default*/

INLINE_DEVICE\

(void) device_detach_address

(device *me,

 attach_type attach,

 int space,

 unsigned_word addr,

 unsigned nr_bytes,

 access_type access,

 device *client); /*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()>>.

   */

typedef enum {

  device_ioctl_break, /* unsigned_word requested_break */

  device_ioctl_set_trace, /* void */

  device_ioctl_create_stack, /* unsigned_word *sp, char **argv, char **envp */

  device_ioctl_change_media, /* const char *new_image (possibly NULL) */

  nr_device_ioctl_requests,

} device_ioctl_request;

EXTERN_DEVICE\

(int) device_ioctl

(device *me,

 cpu *processor,

 unsigned_word cia,

 device_ioctl_request request,

 ...);

/* 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)));

INLINE_DEVICE\

(int) device_trace

(device *me);

/* 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,

 unsigned_cell phandle);

INLINE_DEVICE\

(unsigned_cell) device_to_external

(device *me);

INLINE_DEVICE\

(device_instance *) external_to_device_instance

(device *tree_member,

 unsigned_cell ihandle);

INLINE_DEVICE\

(unsigned_cell) device_instance_to_external

(device_instance *me);

/* Event queue:

   The device inherets certain event queue operations from the main

   simulation. */

typedef void device_event_handler(void *data);