/* Simulator parallel routines for CGEN simulators (and maybe others).
   Copyright (C) 1999-2021 Free Software Foundation, Inc.
   Contributed by Cygnus Solutions.

This file is part of the GNU instruction set simulator.

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/>.  */

#include "sim-main.h"
#include <stdlib.h>
#include "cgen-mem.h"
#include "cgen-par.h"

/* Functions required by the cgen interface.  These functions add various
   kinds of writes to the write queue.  */
void sim_queue_bi_write (SIM_CPU *cpu, BI *target, BI value)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_BI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.bi_write.target = target;
  element->kinds.bi_write.value  = value;
}

void sim_queue_qi_write (SIM_CPU *cpu, UQI *target, UQI value)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_QI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.qi_write.target = target;
  element->kinds.qi_write.value  = value;
}

void sim_queue_si_write (SIM_CPU *cpu, SI *target, SI value)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_SI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.si_write.target = target;
  element->kinds.si_write.value  = value;
}

void sim_queue_sf_write (SIM_CPU *cpu, SI *target, SF value)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_SF_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.sf_write.target = target;
  element->kinds.sf_write.value  = value;
}

void sim_queue_pc_write (SIM_CPU *cpu, USI value)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_PC_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.pc_write.value = value;
}

void sim_queue_fn_hi_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, UINT, UHI),
  UINT regno,
  UHI value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_HI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_hi_write.function = write_function;
  element->kinds.fn_hi_write.regno = regno;
  element->kinds.fn_hi_write.value = value;
}

void sim_queue_fn_si_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, UINT, USI),
  UINT regno,
  USI value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_SI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_si_write.function = write_function;
  element->kinds.fn_si_write.regno = regno;
  element->kinds.fn_si_write.value = value;
}

void sim_queue_fn_sf_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, UINT, SF),
  UINT regno,
  SF value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_SF_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_sf_write.function = write_function;
  element->kinds.fn_sf_write.regno = regno;
  element->kinds.fn_sf_write.value = value;
}

void sim_queue_fn_di_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, UINT, DI),
  UINT regno,
  DI value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_DI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_di_write.function = write_function;
  element->kinds.fn_di_write.regno = regno;
  element->kinds.fn_di_write.value = value;
}

void sim_queue_fn_xi_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, UINT, SI *),
  UINT regno,
  SI *value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_XI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_xi_write.function = write_function;
  element->kinds.fn_xi_write.regno = regno;
  element->kinds.fn_xi_write.value[0] = value[0];
  element->kinds.fn_xi_write.value[1] = value[1];
  element->kinds.fn_xi_write.value[2] = value[2];
  element->kinds.fn_xi_write.value[3] = value[3];
}

void sim_queue_fn_df_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, UINT, DF),
  UINT regno,
  DF value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_DF_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_df_write.function = write_function;
  element->kinds.fn_df_write.regno = regno;
  element->kinds.fn_df_write.value = value;
}

void sim_queue_fn_pc_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, USI),
  USI value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_PC_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_pc_write.function = write_function;
  element->kinds.fn_pc_write.value = value;
}

void sim_queue_mem_qi_write (SIM_CPU *cpu, SI address, QI value)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_MEM_QI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.mem_qi_write.address = address;
  element->kinds.mem_qi_write.value   = value;
}

void sim_queue_mem_hi_write (SIM_CPU *cpu, SI address, HI value)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_MEM_HI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.mem_hi_write.address = address;
  element->kinds.mem_hi_write.value   = value;
}

void sim_queue_mem_si_write (SIM_CPU *cpu, SI address, SI value)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_MEM_SI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.mem_si_write.address = address;
  element->kinds.mem_si_write.value   = value;
}

void sim_queue_mem_di_write (SIM_CPU *cpu, SI address, DI value)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_MEM_DI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.mem_di_write.address = address;
  element->kinds.mem_di_write.value   = value;
}

void sim_queue_mem_df_write (SIM_CPU *cpu, SI address, DF value)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_MEM_DF_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.mem_df_write.address = address;
  element->kinds.mem_df_write.value   = value;
}

void sim_queue_mem_xi_write (SIM_CPU *cpu, SI address, SI *value)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_MEM_XI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.mem_xi_write.address = address;
  element->kinds.mem_xi_write.value[0] = value[0];
  element->kinds.mem_xi_write.value[1] = value[1];
  element->kinds.mem_xi_write.value[2] = value[2];
  element->kinds.mem_xi_write.value[3] = value[3];
}

void sim_queue_fn_mem_qi_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, IADDR, SI, QI),
  SI address,
  QI value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_MEM_QI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_mem_qi_write.function = write_function;
  element->kinds.fn_mem_qi_write.address = address;
  element->kinds.fn_mem_qi_write.value   = value;
}

void sim_queue_fn_mem_hi_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, IADDR, SI, HI),
  SI address,
  HI value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_MEM_HI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_mem_hi_write.function = write_function;
  element->kinds.fn_mem_hi_write.address = address;
  element->kinds.fn_mem_hi_write.value   = value;
}

void sim_queue_fn_mem_si_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, IADDR, SI, SI),
  SI address,
  SI value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_MEM_SI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_mem_si_write.function = write_function;
  element->kinds.fn_mem_si_write.address = address;
  element->kinds.fn_mem_si_write.value   = value;
}

void sim_queue_fn_mem_di_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, IADDR, SI, DI),
  SI address,
  DI value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_MEM_DI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_mem_di_write.function = write_function;
  element->kinds.fn_mem_di_write.address = address;
  element->kinds.fn_mem_di_write.value   = value;
}

void sim_queue_fn_mem_df_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, IADDR, SI, DF),
  SI address,
  DF value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_MEM_DF_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_mem_df_write.function = write_function;
  element->kinds.fn_mem_df_write.address = address;
  element->kinds.fn_mem_df_write.value   = value;
}

void sim_queue_fn_mem_xi_write (
  SIM_CPU *cpu,
  void (*write_function)(SIM_CPU *cpu, IADDR, SI, SI *),
  SI address,
  SI *value
)
{
  CGEN_WRITE_QUEUE *q = CPU_WRITE_QUEUE (cpu);
  CGEN_WRITE_QUEUE_ELEMENT *element = CGEN_WRITE_QUEUE_NEXT (q);
  element->kind = CGEN_FN_MEM_XI_WRITE;
  element->insn_address = CPU_PC_GET (cpu);
  element->kinds.fn_mem_xi_write.function = write_function;
  element->kinds.fn_mem_xi_write.address = address;
  element->kinds.fn_mem_xi_write.value[0] = value[0];
  element->kinds.fn_mem_xi_write.value[1] = value[1];
  element->kinds.fn_mem_xi_write.value[2] = value[2];
  element->kinds.fn_mem_xi_write.value[3] = value[3];
}

/* Execute a write stored on the write queue.  */
void
cgen_write_queue_element_execute (SIM_CPU *cpu, CGEN_WRITE_QUEUE_ELEMENT *item)
{
  IADDR pc;
  switch (CGEN_WRITE_QUEUE_ELEMENT_KIND (item))
    {
    case CGEN_BI_WRITE:
      *item->kinds.bi_write.target = item->kinds.bi_write.value;
      break;
    case CGEN_QI_WRITE:
      *item->kinds.qi_write.target = item->kinds.qi_write.value;
      break;
    case CGEN_SI_WRITE:
      *item->kinds.si_write.target = item->kinds.si_write.value;
      break;
    case CGEN_SF_WRITE:
      *item->kinds.sf_write.target = item->kinds.sf_write.value;
      break;
    case CGEN_PC_WRITE:
      CPU_PC_SET (cpu, item->kinds.pc_write.value);
      break;
    case CGEN_FN_HI_WRITE:
      item->kinds.fn_hi_write.function (cpu,
					item->kinds.fn_hi_write.regno,
					item->kinds.fn_hi_write.value);
      break;
    case CGEN_FN_SI_WRITE:
      item->kinds.fn_si_write.function (cpu,
					item->kinds.fn_si_write.regno,
					item->kinds.fn_si_write.value);
      break;
    case CGEN_FN_SF_WRITE:
      item->kinds.fn_sf_write.function (cpu,
					item->kinds.fn_sf_write.regno,
					item->kinds.fn_sf_write.value);
      break;
    case CGEN_FN_DI_WRITE:
      item->kinds.fn_di_write.function (cpu,
					item->kinds.fn_di_write.regno,
					item->kinds.fn_di_write.value);
      break;
    case CGEN_FN_DF_WRITE:
      item->kinds.fn_df_write.function (cpu,
					item->kinds.fn_df_write.regno,
					item->kinds.fn_df_write.value);
      break;
    case CGEN_FN_XI_WRITE:
      item->kinds.fn_xi_write.function (cpu,
					item->kinds.fn_xi_write.regno,
					item->kinds.fn_xi_write.value);
      break;
    case CGEN_FN_PC_WRITE:
      item->kinds.fn_pc_write.function (cpu, item->kinds.fn_pc_write.value);
      break;
    case CGEN_MEM_QI_WRITE:
      pc = item->insn_address;
      SETMEMQI (cpu, pc, item->kinds.mem_qi_write.address,
		item->kinds.mem_qi_write.value);
      break;
    case CGEN_MEM_HI_WRITE:
      pc = item->insn_address;
      SETMEMHI (cpu, pc, item->kinds.mem_hi_write.address,
		item->kinds.mem_hi_write.value);
      break;
    case CGEN_MEM_SI_WRITE:
      pc = item->insn_address;
      SETMEMSI (cpu, pc, item->kinds.mem_si_write.address,
		item->kinds.mem_si_write.value);
      break;
    case CGEN_MEM_DI_WRITE:
      pc = item->insn_address;
      SETMEMDI (cpu, pc, item->kinds.mem_di_write.address,
		item->kinds.mem_di_write.value);
      break;
    case CGEN_MEM_DF_WRITE:
      pc = item->insn_address;
      SETMEMDF (cpu, pc, item->kinds.mem_df_write.address,
		item->kinds.mem_df_write.value);
      break;
    case CGEN_MEM_XI_WRITE:
      pc = item->insn_address;
      SETMEMSI (cpu, pc, item->kinds.mem_xi_write.address,
		item->kinds.mem_xi_write.value[0]);
      SETMEMSI (cpu, pc, item->kinds.mem_xi_write.address + 4,
		item->kinds.mem_xi_write.value[1]);
      SETMEMSI (cpu, pc, item->kinds.mem_xi_write.address + 8,
		item->kinds.mem_xi_write.value[2]);
      SETMEMSI (cpu, pc, item->kinds.mem_xi_write.address + 12,
		item->kinds.mem_xi_write.value[3]);
      break;
    case CGEN_FN_MEM_QI_WRITE:
      pc = item->insn_address;
      item->kinds.fn_mem_qi_write.function (cpu, pc,
					    item->kinds.fn_mem_qi_write.address,
					    item->kinds.fn_mem_qi_write.value);
      break;
    case CGEN_FN_MEM_HI_WRITE:
      pc = item->insn_address;
      item->kinds.fn_mem_hi_write.function (cpu, pc,
					    item->kinds.fn_mem_hi_write.address,
					    item->kinds.fn_mem_hi_write.value);
      break;
    case CGEN_FN_MEM_SI_WRITE:
      pc = item->insn_address;
      item->kinds.fn_mem_si_write.function (cpu, pc,
					    item->kinds.fn_mem_si_write.address,
					    item->kinds.fn_mem_si_write.value);
      break;
    case CGEN_FN_MEM_DI_WRITE:
      pc = item->insn_address;
      item->kinds.fn_mem_di_write.function (cpu, pc,
					    item->kinds.fn_mem_di_write.address,
					    item->kinds.fn_mem_di_write.value);
      break;
    case CGEN_FN_MEM_DF_WRITE:
      pc = item->insn_address;
      item->kinds.fn_mem_df_write.function (cpu, pc,
					    item->kinds.fn_mem_df_write.address,
					    item->kinds.fn_mem_df_write.value);
      break;
    case CGEN_FN_MEM_XI_WRITE:
      pc = item->insn_address;
      item->kinds.fn_mem_xi_write.function (cpu, pc,
					    item->kinds.fn_mem_xi_write.address,
					    item->kinds.fn_mem_xi_write.value);
      break;
    default:
      abort ();
      break; /* FIXME: for now....print message later.  */
    }
}

/* Utilities for the write queue.  */
CGEN_WRITE_QUEUE_ELEMENT *
cgen_write_queue_overflow (CGEN_WRITE_QUEUE *q)
{
  abort (); /* FIXME: for now....print message later.  */
  return 0;
}