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/* Mitsubishi Electric Corp. D30V Simulator.

   Copyright (C) 1997, Free Software Foundation, Inc.

   Contributed by Cygnus Support.

This file is part of GDB, the GNU debugger.

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, 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 _CPU_H_

#define _CPU_H_

enum {

  NR_GENERAL_PURPOSE_REGISTERS = 64,

  NR_CONTROL_REGISTERS = 64,

  NR_ACCUMULATORS = 2,

  STACK_POINTER_GPR = 63,

  NR_STACK_POINTERS = 2,

};

enum {

  processor_status_word_cr = 0,

  backup_processor_status_word_cr = 1,

  program_counter_cr = 2,

  backup_program_counter_cr = 3,

  debug_backup_processor_status_word_cr = 4,

  debug_backup_program_counter_cr = 5,

  reserved_6_cr = 6,

  repeat_count_cr = 7,

  repeat_start_address_cr = 8,

  repeat_end_address_cr = 9,

  modulo_start_address_cr = 10,

  modulo_end_address_cr = 11,

  instruction_break_address_cr = 14,

  eit_vector_base_cr = 15,

};

enum {

  PSW_SM = 0,

  PSW_EA = 2,

  PSW_DB = 3,

  PSW_DS = 4,

  PSW_IE = 5,

  PSW_RP = 6,

  PSW_MD = 7,

  PSW_F0 = 17,

  PSW_F1 = 19,

  PSW_F2 = 21,

  PSW_F3 = 23,

  PSW_S = 25,

  PSW_V = 27,

  PSW_VA = 29,

  PSW_C = 31,

};

/* aliases for PSW flag numbers (F0..F7) */

enum

{

  PSW_S_FLAG = 4,

};

typedef struct _registers {

  unsigned32 general_purpose[NR_GENERAL_PURPOSE_REGISTERS];

  /* keep track of the stack pointer */

  unsigned32 sp[NR_STACK_POINTERS]; /* swap with SP */

  unsigned32 current_sp;

  unsigned32 control[NR_CONTROL_REGISTERS];

  unsigned64 accumulator[NR_ACCUMULATORS];

} registers;

typedef enum _cpu_units {

  memory_unit,

  integer_unit,

  any_unit,

} cpu_units;

/* In order to support parallel instructions, which one instruction can be

   writing to a register that is used as input to another, queue up the

   writes to the end of the instruction boundaries.  */

#define MAX_WRITE32     16

#define MAX_WRITE64     2

struct _write32 {

  int num;                              /* # of 32-bit writes queued up */

  unsigned32 value[MAX_WRITE32];        /* value to write */

  unsigned32 mask[MAX_WRITE32];         /* mask to use */

  unsigned32 *ptr[MAX_WRITE32];         /* address to write to */

};

struct _write64 {

  int num;                              /* # of 64-bit writes queued up */

  unsigned64 value[MAX_WRITE64];        /* value to write */

  unsigned64 *ptr[MAX_WRITE64];         /* address to write to */

};

struct _sim_cpu {

  cpu_units unit;

  registers regs;

  sim_cpu_base base;

  int trace_call_p;                     /* Whether to do call tracing.  */

  int trace_trap_p;                     /* If unknown traps dump out the regs */

  int trace_action;                     /* trace bits at end of instructions */

  int left_kills_right_p;               /* left insn kills insn in right slot of -> */

  int mvtsys_left_p;                    /* left insn was mvtsys */

  int did_trap;                         /* we did a trap & need to finish it */

  struct _write32 write32;              /* queued up 32-bit writes */

  struct _write64 write64;              /* queued up 64-bit writes */

};

#define PC      (STATE_CPU (sd, 0)->regs.control[program_counter_cr])

#define PSW     (STATE_CPU (sd, 0)->regs.control[processor_status_word_cr])

#define PSWL    (*AL2_4(&PSW))

#define PSWH    (*AH2_4(&PSW))

#define DPSW    (STATE_CPU (sd, 0)->regs.control[debug_backup_processor_status_word_cr])

#define DPC     (STATE_CPU (sd, 0)->regs.control[debug_backup_program_counter_cr])

#define bPC     (STATE_CPU (sd, 0)->regs.control[backup_program_counter_cr])

#define bPSW    (STATE_CPU (sd, 0)->regs.control[backup_processor_status_word_cr])

#define RPT_C   (STATE_CPU (sd, 0)->regs.control[repeat_count_cr])

#define RPT_S   (STATE_CPU (sd, 0)->regs.control[repeat_start_address_cr])

#define RPT_E   (STATE_CPU (sd, 0)->regs.control[repeat_end_address_cr])

#define MOD_S   (STATE_CPU (sd, 0)->regs.control[modulo_start_address_cr])

#define MOD_E   (STATE_CPU (sd, 0)->regs.control[modulo_end_address_cr])

#define IBA     (STATE_CPU (sd, 0)->regs.control[instruction_break_address_cr])

#define EIT_VB  (STATE_CPU (sd, 0)->regs.control[eit_vector_base_cr])

#define GPR     (STATE_CPU (sd, 0)->regs.general_purpose)

#define GPR_SET(N,VAL) (GPR[(N)] = (VAL))

#define ACC     (STATE_CPU (sd, 0)->regs.accumulator)

#define CREG    (STATE_CPU (sd, 0)->regs.control)

#define SP      (GPR[STACK_POINTER_GPR])

#define TRACE_CALL_P (STATE_CPU (sd, 0)->trace_call_p)

#define TRACE_TRAP_P (STATE_CPU (sd, 0)->trace_trap_p)

#define TRACE_ACTION (STATE_CPU (sd, 0)->trace_action)

#define     TRACE_ACTION_CALL   0x00000001      /* call occurred */

#define     TRACE_ACTION_RETURN 0x00000002      /* return occurred */

#define WRITE32 (STATE_CPU (sd, 0)->write32)

#define WRITE32_NUM      (WRITE32.num)

#define WRITE32_PTR(N)   (WRITE32.ptr[N])

#define WRITE32_MASK(N)  (WRITE32.mask[N])

#define WRITE32_VALUE(N) (WRITE32.value[N])

#define WRITE32_QUEUE(PTR, VALUE) WRITE32_QUEUE_MASK (PTR, VALUE, 0xffffffff)

#define WRITE32_QUEUE_MASK(PTR, VALUE, MASK)                            \

do {                                                                    \

  int _num = WRITE32_NUM;                                               \

  if (_num >= MAX_WRITE32)                                              \

    sim_engine_abort (sd, STATE_CPU (sd, 0), cia,                        \

                      "Too many queued 32-bit writes");                 \

  WRITE32_PTR(_num) = PTR;                                              \

  WRITE32_VALUE(_num) = VALUE;                                          \

  WRITE32_MASK(_num) = MASK;                                            \

  WRITE32_NUM = _num+1;                                                 \

} while (0)

#define DID_TRAP        (STATE_CPU (sd, 0)->did_trap)

#define WRITE64 (STATE_CPU (sd, 0)->write64)

#define WRITE64_NUM      (WRITE64.num)

#define WRITE64_PTR(N)   (WRITE64.ptr[N])

#define WRITE64_VALUE(N) (WRITE64.value[N])

#define WRITE64_QUEUE(PTR, VALUE)                                       \

do {                                                                    \

  int _num = WRITE64_NUM;                                               \

  if (_num >= MAX_WRITE64)                                              \

    sim_engine_abort (sd, STATE_CPU (sd, 0), cia,                        \

                      "Too many queued 64-bit writes");                 \

  WRITE64_PTR(_num) = PTR;                                              \

  WRITE64_VALUE(_num) = VALUE;                                          \

  WRITE64_NUM = _num+1;                                                 \

} while (0)

#define DPSW_VALID      0xbf005555

#define PSW_VALID       0xb7005555

#define EIT_VALID       0xfffff000      /* From page 7-4 of D30V/MPEG arch. manual  */

#define EIT_VB_DEFAULT  0xfffff000      /* Value of the EIT_VB register after reset */

/* Verify that the instruction is in the correct slot */

#define IS_WRONG_SLOT is_wrong_slot(sd, cia, MY_INDEX)

extern int is_wrong_slot

(SIM_DESC sd,

 address_word cia,

 itable_index index);

#define IS_CONDITION_OK is_condition_ok(sd, cia, CCC)

extern int is_condition_ok

(SIM_DESC sd,

 address_word cia,

 int cond);

#define SIM_HAVE_BREAKPOINTS    /* Turn on internal breakpoint module */

/* Internal breakpoint instruction is syscall 5 */

#define SIM_BREAKPOINT {0x0e, 0x00, 0x00, 0x05}

#define SIM_BREAKPOINT_SIZE (4)

/* Call occurred */

extern void call_occurred

(SIM_DESC sd,

 sim_cpu *cpu,

 address_word cia,

 address_word nia);

/* Return occurred */

extern void return_occurred

(SIM_DESC sd,

 sim_cpu *cpu,

 address_word cia,

 address_word nia);

/* Whether to do call tracing.  */

extern int d30v_call_trace_p;

/* Read/write functions for system call interface.  */

extern int d30v_read_mem

(host_callback *cb,

 struct cb_syscall *sc,

 unsigned long taddr,

 char *buf,

 int bytes);

extern int d30v_write_mem

(host_callback *cb,

 struct cb_syscall *sc,

 unsigned long taddr,

 const char *buf,

 int bytes);

/* Process all of the queued up writes in order now */

void unqueue_writes

(SIM_DESC sd,

 sim_cpu *cpu,

 address_word cia);

#endif /* _CPU_H_ */