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/* The common simulator framework for GDB, the GNU Debugger.

   Copyright 2002, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

   Contributed by Andrew Cagney and Red Hat.

   This file is part of GDB.

   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 3 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, see <http://www.gnu.org/licenses/>.  */

#ifndef SIM_CORE_H

#define SIM_CORE_H

/* core signals (error conditions)

   Define SIM_CORE_SIGNAL to catch these signals - see sim-core.c for

   details.  */

typedef enum {

  sim_core_unmapped_signal,

  sim_core_unaligned_signal,

  nr_sim_core_signals,

} sim_core_signals;

/* Type of SIM_CORE_SIGNAL handler.  */

typedef void (SIM_CORE_SIGNAL_FN)

     (SIM_DESC sd, sim_cpu *cpu, sim_cia cia, unsigned map, int nr_bytes,

      address_word addr, transfer_type transfer, sim_core_signals sig);

extern SIM_CORE_SIGNAL_FN sim_core_signal;

/* basic types */

typedef struct _sim_core_mapping sim_core_mapping;

struct _sim_core_mapping {

  /* common */

  int level;

  int space;

  unsigned_word base;

  unsigned_word bound;

  unsigned_word nr_bytes;

  unsigned mask;

  /* memory map */

  void *free_buffer;

  void *buffer;

  /* callback map */

#if (WITH_HW)

  struct hw *device;

#else

  device *device;

#endif

  /* tracing */

  int trace;

  /* growth */

  sim_core_mapping *next;

};

typedef struct _sim_core_map sim_core_map;

struct _sim_core_map {

  sim_core_mapping *first;

};

typedef struct _sim_core_common {

  sim_core_map map[nr_maps];

} sim_core_common;

/* Main core structure */

typedef struct _sim_core sim_core;

struct _sim_core {

  sim_core_common common;

  address_word byte_xor; /* apply xor universally */

};

/* Per CPU distributed component of the core.  At present this is

   mostly a clone of the global core data structure. */

typedef struct _sim_cpu_core {

  sim_core_common common;

  address_word xor[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero-sized array */

} sim_cpu_core;

/* Install the "core" module.  */

extern SIM_RC sim_core_install (SIM_DESC sd);

/* Create a memory region within the core.

   CPU - when non NULL, specifes the single processor that the memory

   space is to be attached to. (INIMPLEMENTED).

   LEVEL - specifies the ordering of the memory region.  Lower regions

   are searched first.  Within a level, memory regions can not

   overlap.

   MAPMASK - Bitmask specifying the memory maps that the region is to

   be attached to.  Typically the enums sim-basics.h:access_* are used.

   ADDRESS_SPACE - For device regions, a MAP:ADDRESS pair is

   translated into ADDRESS_SPACE:OFFSET before being passed to the

   client device.

   MODULO - when the simulator has been configured WITH_MODULO support

   and is greater than zero, specifies that accesses to the region

   [ADDR .. ADDR+NR_BYTES) should be mapped onto the sub region [ADDR

   .. ADDR+MODULO).  The modulo value must be a power of two.

   DEVICE - When non NULL, indicates that this is a callback memory

   space and specified device's memory callback handler should be

   called.

   OPTIONAL_BUFFER - when non NULL, specifies the buffer to use for

   data read & written to the region.  Normally a more efficient

   internal structure is used.  It is assumed that buffer is allocated

   such that the byte alignmed of OPTIONAL_BUFFER matches ADDR vis

   (OPTIONAL_BUFFER % 8) == (ADDR % 8)).  It is defined to be a sub-optimal

   hook that allows clients to do nasty things that the interface doesn't

   accomodate. */

extern void sim_core_attach

(SIM_DESC sd,

 sim_cpu *cpu,

 int level,

 unsigned mapmask,

 int address_space,

 address_word addr,

 address_word nr_bytes,

 unsigned modulo,

#if (WITH_HW)

 struct hw *client,

#else

 device *client,

#endif

 void *optional_buffer);

/* Delete a memory section within the core.

 */

extern void sim_core_detach

(SIM_DESC sd,

 sim_cpu *cpu,

 int level,

 int address_space,

 address_word addr);

/* Variable sized read/write

   Transfer a variable sized block of raw data between the host and

   target.  Should any problems occur, the number of bytes

   successfully transfered is returned.

   No host/target byte endian conversion is performed.  No xor-endian

   conversion is performed.

   If CPU argument, when non NULL, specifies the processor specific

   address map that is to be used in the transfer. */

extern unsigned sim_core_read_buffer

(SIM_DESC sd,

 sim_cpu *cpu,

 unsigned map,

 void *buffer,

 address_word addr,

 unsigned nr_bytes);

extern unsigned sim_core_write_buffer

(SIM_DESC sd,

 sim_cpu *cpu,

 unsigned map,

 const void *buffer,

 address_word addr,

 unsigned nr_bytes);

/* Configure the core's XOR endian transfer mode.  Only applicable

   when WITH_XOR_ENDIAN is enabled.

   Targets suporting XOR endian, shall notify the core of any changes

   in state via this call.

   The CPU argument, when non NULL, specifes the single processor that

   the xor-endian configuration is to be applied to. */

extern void sim_core_set_xor

(SIM_DESC sd,

 sim_cpu *cpu,

 int is_xor);

/* XOR version of variable sized read/write.

   Transfer a variable sized block of raw data between the host and

   target.  Should any problems occur, the number of bytes

   successfully transfered is returned.

   No host/target byte endian conversion is performed.  If applicable

   (WITH_XOR_ENDIAN and xor-endian set), xor-endian conversion *is*

   performed.

   If CPU argument, when non NULL, specifies the processor specific

   address map that is to be used in the transfer. */

extern unsigned sim_core_xor_read_buffer

(SIM_DESC sd,

 sim_cpu *cpu,

 unsigned map,

 void *buffer,

 address_word addr,

 unsigned nr_bytes);

extern unsigned sim_core_xor_write_buffer

(SIM_DESC sd,

 sim_cpu *cpu,

 unsigned map,

 const void *buffer,

 address_word addr,

 unsigned nr_bytes);

/* Fixed sized, processor oriented, read/write.

   Transfer a fixed amout of memory between the host and target.  The

   data transfered is translated from/to host to/from target byte

   order (including xor endian).  Should the transfer fail, the

   operation shall abort (no return).

   ALIGNED assumes yhat the specified ADDRESS is correctly alligned

   for an N byte transfer (no alignment checks are made).  Passing an

   incorrectly aligned ADDRESS is erroneous.

   UNALIGNED checks/modifies the ADDRESS according to the requirements

   of an N byte transfer. Action, as defined by WITH_ALIGNMENT, being

   taken should the check fail.

   MISSALIGNED transfers the data regardless.

   Misaligned xor-endian accesses are broken into a sequence of

   transfers each <= WITH_XOR_ENDIAN bytes */

#define DECLARE_SIM_CORE_WRITE_N(ALIGNMENT,N,M) \

INLINE_SIM_CORE\

(void) sim_core_write_##ALIGNMENT##_##N \

(sim_cpu *cpu, \

 sim_cia cia, \

 unsigned map, \

 address_word addr, \

 unsigned_##M val);

DECLARE_SIM_CORE_WRITE_N(aligned,1,1)

DECLARE_SIM_CORE_WRITE_N(aligned,2,2)

DECLARE_SIM_CORE_WRITE_N(aligned,4,4)

DECLARE_SIM_CORE_WRITE_N(aligned,8,8)

DECLARE_SIM_CORE_WRITE_N(aligned,16,16)

#define sim_core_write_unaligned_1 sim_core_write_aligned_1 

DECLARE_SIM_CORE_WRITE_N(unaligned,2,2)

DECLARE_SIM_CORE_WRITE_N(unaligned,4,4)

DECLARE_SIM_CORE_WRITE_N(unaligned,8,8)

DECLARE_SIM_CORE_WRITE_N(unaligned,16,16)

DECLARE_SIM_CORE_WRITE_N(misaligned,3,4)

DECLARE_SIM_CORE_WRITE_N(misaligned,5,8)

DECLARE_SIM_CORE_WRITE_N(misaligned,6,8)

DECLARE_SIM_CORE_WRITE_N(misaligned,7,8)

#define sim_core_write_1 sim_core_write_aligned_1

#define sim_core_write_2 sim_core_write_aligned_2

#define sim_core_write_4 sim_core_write_aligned_4

#define sim_core_write_8 sim_core_write_aligned_8

#define sim_core_write_16 sim_core_write_aligned_16

#define sim_core_write_unaligned_word XCONCAT2(sim_core_write_unaligned_,WITH_TARGET_WORD_BITSIZE)

#define sim_core_write_aligned_word XCONCAT2(sim_core_write_aligned_,WITH_TARGET_WORD_BITSIZE)

#define sim_core_write_word XCONCAT2(sim_core_write_,WITH_TARGET_WORD_BITSIZE)

#undef DECLARE_SIM_CORE_WRITE_N

#define DECLARE_SIM_CORE_READ_N(ALIGNMENT,N,M) \

INLINE_SIM_CORE\

(unsigned_##M) sim_core_read_##ALIGNMENT##_##N \

(sim_cpu *cpu, \

 sim_cia cia, \

 unsigned map, \

 address_word addr);

DECLARE_SIM_CORE_READ_N(aligned,1,1)

DECLARE_SIM_CORE_READ_N(aligned,2,2)

DECLARE_SIM_CORE_READ_N(aligned,4,4)

DECLARE_SIM_CORE_READ_N(aligned,8,8)

DECLARE_SIM_CORE_READ_N(aligned,16,16)

#define sim_core_read_unaligned_1 sim_core_read_aligned_1

DECLARE_SIM_CORE_READ_N(unaligned,2,2)

DECLARE_SIM_CORE_READ_N(unaligned,4,4)

DECLARE_SIM_CORE_READ_N(unaligned,8,8)

DECLARE_SIM_CORE_READ_N(unaligned,16,16)

DECLARE_SIM_CORE_READ_N(misaligned,3,4)

DECLARE_SIM_CORE_READ_N(misaligned,5,8)

DECLARE_SIM_CORE_READ_N(misaligned,6,8)

DECLARE_SIM_CORE_READ_N(misaligned,7,8)

#define sim_core_read_1 sim_core_read_aligned_1

#define sim_core_read_2 sim_core_read_aligned_2

#define sim_core_read_4 sim_core_read_aligned_4

#define sim_core_read_8 sim_core_read_aligned_8

#define sim_core_read_16 sim_core_read_aligned_16

#define sim_core_read_unaligned_word XCONCAT2(sim_core_read_unaligned_,WITH_TARGET_WORD_BITSIZE)

#define sim_core_read_aligned_word XCONCAT2(sim_core_read_aligned_,WITH_TARGET_WORD_BITSIZE)

#define sim_core_read_word XCONCAT2(sim_core_read_,WITH_TARGET_WORD_BITSIZE)

#undef DECLARE_SIM_CORE_READ_N

#if (WITH_DEVICES)

/* TODO: create sim/common/device.h */

/* These are defined with each particular cpu.  */

void device_error (device *me, char* message, ...);

int device_io_read_buffer(device *me, void *dest, int space, address_word addr, unsigned nr_bytes, SIM_DESC sd, sim_cpu *processor, sim_cia cia);

int device_io_write_buffer(device *me, const void *source, int space, address_word addr, unsigned nr_bytes, SIM_DESC sd, sim_cpu *processor, sim_cia cia);

#endif

#endif