mirror of
https://github.com/ksherlock/mpw.git
synced 2024-11-22 00:32:44 +00:00
459 lines
13 KiB
C
459 lines
13 KiB
C
/* @(#) $Id: CpuIntegration.c,v 1.10 2013/01/08 19:17:33 peschau Exp $ */
|
|
/*=========================================================================*/
|
|
/* Fellow */
|
|
/* Initialization of 68000 core */
|
|
/* Integrates the 68k emulation with custom chips */
|
|
/* */
|
|
/* Author: Petter Schau */
|
|
/* */
|
|
/* Copyright (C) 1991, 1992, 1996 Free Software Foundation, Inc. */
|
|
/* */
|
|
/* 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. */
|
|
/*=========================================================================*/
|
|
|
|
#include "defs.h"
|
|
#include "fellow.h"
|
|
#include "fmem.h"
|
|
#include "CpuModule.h"
|
|
#include "CpuIntegration.h"
|
|
#include "CpuModule_Internal.h"
|
|
#include "bus.h"
|
|
#include "fileops.h"
|
|
|
|
|
|
jmp_buf cpu_integration_exception_buffer;
|
|
|
|
/* custom chip intreq bit-number to irq-level */
|
|
static ULO cpu_integration_int_to_level[16] = {1,1,1,2, 3,3,3,4, 4,4,4,5, 5,6,6,7};
|
|
static ULO cpu_integration_irq_source;
|
|
|
|
/* Cycles spent by chips (Blitter) as a result of an instruction */
|
|
static ULO cpu_integration_chip_cycles;
|
|
static ULO cpu_integration_chip_slowdown;
|
|
|
|
/*===========================================================================*/
|
|
/* CPU properties */
|
|
/*===========================================================================*/
|
|
|
|
ULO cpu_integration_speed; // The speed as expressed in the fellow configuration settings
|
|
ULO cpu_integration_speed_multiplier; // The cycle multiplier used to adjust the cpu-speed, calculated from cpu_integration_speed
|
|
cpu_integration_models cpu_integration_model; // The cpu model as expressed in the fellow configuration settings
|
|
|
|
/*===========================================================================*/
|
|
/* CPU properties */
|
|
/*===========================================================================*/
|
|
|
|
void cpuIntegrationSetSpeed(ULO speed)
|
|
{
|
|
cpu_integration_speed = speed;
|
|
}
|
|
|
|
ULO cpuIntegrationGetSpeed(void)
|
|
{
|
|
return cpu_integration_speed;
|
|
}
|
|
|
|
static void cpuIntegrationSetSpeedMultiplier(ULO multiplier)
|
|
{
|
|
cpu_integration_speed_multiplier = multiplier;
|
|
}
|
|
|
|
static ULO cpuIntegrationGetSpeedMultiplier(void)
|
|
{
|
|
return cpu_integration_speed_multiplier;
|
|
}
|
|
|
|
static void cpuIntegrationCalculateMultiplier(void)
|
|
{
|
|
ULO multiplier = 12;
|
|
|
|
switch (cpuGetModelMajor())
|
|
{
|
|
case 0:
|
|
multiplier = 12;
|
|
break;
|
|
case 1:
|
|
multiplier = 12;
|
|
break;
|
|
case 2:
|
|
multiplier = 11;
|
|
break;
|
|
case 3:
|
|
multiplier = 11;
|
|
break;
|
|
}
|
|
|
|
if (cpuIntegrationGetSpeed() >= 8) cpuIntegrationSetSpeedMultiplier(multiplier);
|
|
else if (cpuIntegrationGetSpeed() >= 4) cpuIntegrationSetSpeedMultiplier(multiplier - 1);
|
|
else if (cpuIntegrationGetSpeed() >= 2) cpuIntegrationSetSpeedMultiplier(multiplier - 2);
|
|
else if (cpuIntegrationGetSpeed() >= 1) cpuIntegrationSetSpeedMultiplier(multiplier - 3);
|
|
else cpuIntegrationSetSpeedMultiplier(multiplier - 4);
|
|
}
|
|
|
|
BOOLE cpuIntegrationSetModel(cpu_integration_models model)
|
|
{
|
|
BOOLE needreset = (cpu_integration_model != model);
|
|
cpu_integration_model = model;
|
|
|
|
switch (cpu_integration_model)
|
|
{
|
|
case M68000: cpuSetModel(0, 0); break;
|
|
case M68010: cpuSetModel(1, 0); break;
|
|
case M68020: cpuSetModel(2, 0); break;
|
|
case M68030: cpuSetModel(3, 0); break;
|
|
case M68EC20: cpuSetModel(2, 1); break;
|
|
case M68EC30: cpuSetModel(3, 1); break;
|
|
}
|
|
return needreset;
|
|
}
|
|
|
|
cpu_integration_models cpuIntegrationGetModel(void)
|
|
{
|
|
return cpu_integration_model;
|
|
}
|
|
|
|
void cpuIntegrationSetChipCycles(ULO chip_cycles)
|
|
{
|
|
cpu_integration_chip_cycles = chip_cycles;
|
|
}
|
|
|
|
ULO cpuIntegrationGetChipCycles(void)
|
|
{
|
|
return cpu_integration_chip_cycles;
|
|
}
|
|
|
|
void cpuIntegrationSetChipSlowdown(ULO chip_slowdown)
|
|
{
|
|
cpu_integration_chip_slowdown = chip_slowdown;
|
|
}
|
|
|
|
ULO cpuIntegrationGetChipSlowdown(void)
|
|
{
|
|
return cpu_integration_chip_slowdown;
|
|
}
|
|
|
|
ULO cpuIntegrationGetChipIrqToIntLevel(ULO chip_irq)
|
|
{
|
|
return cpu_integration_int_to_level[chip_irq];
|
|
}
|
|
|
|
void cpuIntegrationSetIrqSource(ULO irq_source)
|
|
{
|
|
cpu_integration_irq_source = irq_source;
|
|
}
|
|
|
|
ULO cpuIntegrationGetIrqSource(void)
|
|
{
|
|
return cpu_integration_irq_source;
|
|
}
|
|
|
|
/*=====================================================
|
|
Checking for waiting interrupts
|
|
=====================================================*/
|
|
|
|
static BOOLE cpuIntegrationCheckPendingInterruptsFunc(void)
|
|
{
|
|
ULO current_cpu_level = (cpuGetSR() >> 8) & 7;
|
|
BOOLE chip_irqs_enabled = !!(intena & 0x4000);
|
|
|
|
if (chip_irqs_enabled)
|
|
{
|
|
LON highest_chip_irq;
|
|
ULO chip_irqs = intreq & intena;
|
|
|
|
if (chip_irqs == 0) return FALSE;
|
|
|
|
for (highest_chip_irq = 13; highest_chip_irq >= 0; highest_chip_irq--)
|
|
{
|
|
if (chip_irqs & (1 << highest_chip_irq))
|
|
{
|
|
// Found a chip-irq that is both flagged and enabled.
|
|
ULO highest_chip_level = cpuIntegrationGetChipIrqToIntLevel(highest_chip_irq);
|
|
if (highest_chip_level > current_cpu_level)
|
|
{
|
|
cpuSetIrqLevel(highest_chip_level);
|
|
cpuSetIrqAddress(memoryReadLong(cpuGetVbr() + 0x60 + highest_chip_level*4));
|
|
cpuIntegrationSetIrqSource(highest_chip_irq);
|
|
|
|
if (cpuGetStop())
|
|
{
|
|
cpuSetStop(FALSE);
|
|
cpuEvent.cycle = bus.cycle;
|
|
}
|
|
return TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
void cpuIntegrationCheckPendingInterrupts(void)
|
|
{
|
|
cpuCheckPendingInterrupts();
|
|
}
|
|
|
|
/*=========================================*/
|
|
/* Exception mid-instruction exit function */
|
|
/*=========================================*/
|
|
|
|
void cpuIntegrationMidInstructionExceptionFunc(void)
|
|
{
|
|
longjmp(cpu_integration_exception_buffer, -1);
|
|
}
|
|
|
|
/*===================================================*/
|
|
/* Handles reset exception event from the cpu-module */
|
|
/*===================================================*/
|
|
|
|
void cpuIntegrationResetExceptionFunc(void)
|
|
{
|
|
fellowSoftReset();
|
|
}
|
|
|
|
/*=========*/
|
|
/* Logging */
|
|
/*=========*/
|
|
|
|
#ifdef CPU_INSTRUCTION_LOGGING
|
|
|
|
FILE *CPUINSTRUCTIONLOG;
|
|
int cpu_disable_instruction_log = TRUE;
|
|
|
|
void cpuInstructionLogOpen(void)
|
|
{
|
|
if (CPUINSTRUCTIONLOG == NULL)
|
|
{
|
|
char filename[MAX_PATH];
|
|
fileopsGetGenericFileName(filename, "WinFellow", "cpuinstructions.log");
|
|
CPUINSTRUCTIONLOG = fopen(filename, "w");
|
|
}
|
|
}
|
|
|
|
void cpuIntegrationPrintBusCycle(void)
|
|
{
|
|
fprintf(CPUINSTRUCTIONLOG, "%d:%.5d ", bus.frame_no, bus.cycle);
|
|
}
|
|
|
|
void cpuIntegrationInstructionLogging(void)
|
|
{
|
|
char saddress[256], sdata[256], sinstruction[256], soperands[256];
|
|
|
|
if (cpu_disable_instruction_log) return;
|
|
cpuInstructionLogOpen();
|
|
/*
|
|
fprintf(CPUINSTRUCTIONLOG,
|
|
"D0:%.8X D1:%.8X D2:%.8X D3:%.8X D4:%.8X D5:%.8X D6:%.8X D7:%.8X\n",
|
|
cpuGetDReg(0),
|
|
cpuGetDReg(1),
|
|
cpuGetDReg(2),
|
|
cpuGetDReg(3),
|
|
cpuGetDReg(4),
|
|
cpuGetDReg(5),
|
|
cpuGetDReg(6),
|
|
cpuGetDReg(7));
|
|
|
|
fprintf(CPUINSTRUCTIONLOG,
|
|
"A0:%.8X A1:%.8X A2:%.8X A3:%.8X A4:%.8X A5:%.8X A6:%.8X A7:%.8X\n",
|
|
cpuGetAReg(0),
|
|
cpuGetAReg(1),
|
|
cpuGetAReg(2),
|
|
cpuGetAReg(3),
|
|
cpuGetAReg(4),
|
|
cpuGetAReg(5),
|
|
cpuGetAReg(6),
|
|
cpuGetAReg(7));
|
|
*/
|
|
saddress[0] = '\0';
|
|
sdata[0] = '\0';
|
|
sinstruction[0] = '\0';
|
|
soperands[0] = '\0';
|
|
cpuDisOpcode(cpuGetPC(), saddress, sdata, sinstruction, soperands);
|
|
fprintf(CPUINSTRUCTIONLOG, "SSP:%.6X USP:%.6X SP:%.4X %s %s\t%s\t%s\n", cpuGetSspDirect(), cpuGetUspDirect(), cpuGetSR(), saddress, sdata, sinstruction, soperands);
|
|
}
|
|
|
|
void cpuIntegrationExceptionLogging(STR *description, ULO original_pc, UWO opcode)
|
|
{
|
|
if (cpu_disable_instruction_log) return;
|
|
cpuInstructionLogOpen();
|
|
|
|
cpuIntegrationPrintBusCycle();
|
|
fprintf(CPUINSTRUCTIONLOG, "%s for opcode %.4X at PC %.8X from PC %.8X\n", description, opcode, original_pc, cpuGetPC());
|
|
}
|
|
|
|
STR *cpuIntegrationGetInterruptName(ULO chip_irq_no)
|
|
{
|
|
switch (chip_irq_no)
|
|
{
|
|
case 0: return "TBE: Output buffer of the serial port is empty.";
|
|
case 1: return "DSKBLK: Disk DMA transfer ended.";
|
|
case 2: return "SOFT: Software interrupt.";
|
|
case 3: return "PORTS: From CIA-A or expansion port.";
|
|
case 4: return "COPER: Copper interrupt.";
|
|
case 5: return "VERTB: Start of vertical blank.";
|
|
case 6: return "BLIT: Blitter done.";
|
|
case 7: return "AUD0: Audio data on channel 0.";
|
|
case 8: return "AUD1: Audio data on channel 1.";
|
|
case 9: return "AUD2: Audio data on channel 2.";
|
|
case 10: return "AUD3: Audio data on channel 3.";
|
|
case 11: return "RBF: Input buffer of the serial port full.";
|
|
case 12: return "DSKSYN: Disk sync value recognized.";
|
|
case 13: return "EXTER: From CIA-B or expansion port.";
|
|
case 14: return "INTEN: BUG! Not an interrupt.";
|
|
case 15: return "NMI: BUG! Not an interrupt.";
|
|
}
|
|
return "Illegal interrupt source!";
|
|
}
|
|
|
|
void cpuIntegrationInterruptLogging(ULO level, ULO vector_address)
|
|
{
|
|
if (cpu_disable_instruction_log) return;
|
|
cpuInstructionLogOpen();
|
|
|
|
cpuIntegrationPrintBusCycle();
|
|
fprintf(CPUINSTRUCTIONLOG, "Irq %d to %.6X (%s)\n", level, vector_address, cpuIntegrationGetInterruptName(cpuIntegrationGetIrqSource()));
|
|
}
|
|
|
|
#endif
|
|
|
|
void cpuIntegrationExecuteInstructionEventHandler68000Fast(void)
|
|
{
|
|
ULO cycles;
|
|
cycles = cpuExecuteInstruction();
|
|
|
|
if (cpuGetStop())
|
|
{
|
|
cpuEvent.cycle = BUS_CYCLE_DISABLE;
|
|
}
|
|
else
|
|
{
|
|
cpuEvent.cycle += ((cycles*cpuIntegrationGetChipSlowdown())>>1) + cpuIntegrationGetChipCycles();
|
|
}
|
|
cpuIntegrationSetChipCycles(0);
|
|
}
|
|
|
|
void cpuIntegrationExecuteInstructionEventHandler68000General(void)
|
|
{
|
|
ULO cycles = 0;
|
|
ULO time_used = 0;
|
|
|
|
do
|
|
{
|
|
cycles = cpuExecuteInstruction();
|
|
cycles = cycles*cpuIntegrationGetChipSlowdown(); // Compensate for blitter time
|
|
time_used += (cpuIntegrationGetChipCycles()<<12) + (cycles<<cpuIntegrationGetSpeedMultiplier());
|
|
}
|
|
while (time_used < 8192 && !cpuGetStop());
|
|
|
|
if (cpuGetStop())
|
|
{
|
|
cpuEvent.cycle = BUS_CYCLE_DISABLE;
|
|
}
|
|
else
|
|
{
|
|
cpuEvent.cycle += (time_used>>12);
|
|
}
|
|
cpuIntegrationSetChipCycles(0);
|
|
}
|
|
|
|
void cpuIntegrationExecuteInstructionEventHandler68020(void)
|
|
{
|
|
ULO time_used = 0;
|
|
do
|
|
{
|
|
cpuExecuteInstruction();
|
|
time_used += (cpuIntegrationGetChipCycles()<<12) + (4<<cpuIntegrationGetSpeedMultiplier());
|
|
}
|
|
while (time_used < 8192 && !cpuGetStop());
|
|
|
|
if (cpuGetStop())
|
|
{
|
|
cpuEvent.cycle = BUS_CYCLE_DISABLE;
|
|
}
|
|
else
|
|
{
|
|
cpuEvent.cycle += (time_used>>12);
|
|
}
|
|
cpuIntegrationSetChipCycles(0);
|
|
}
|
|
|
|
void cpuIntegrationSetDefaultConfig(void)
|
|
{
|
|
cpuIntegrationSetModel(M68000);
|
|
cpuIntegrationSetChipCycles(0);
|
|
cpuIntegrationSetChipSlowdown(1);
|
|
cpuIntegrationSetSpeed(4);
|
|
|
|
cpuSetCheckPendingInterruptsFunc(cpuIntegrationCheckPendingInterruptsFunc);
|
|
cpuSetMidInstructionExceptionFunc(cpuIntegrationMidInstructionExceptionFunc);
|
|
cpuSetResetExceptionFunc(cpuIntegrationResetExceptionFunc);
|
|
|
|
#ifdef CPU_INSTRUCTION_LOGGING
|
|
cpuSetInstructionLoggingFunc(cpuIntegrationInstructionLogging);
|
|
cpuSetExceptionLoggingFunc(cpuIntegrationExceptionLogging);
|
|
cpuSetInterruptLoggingFunc(cpuIntegrationInterruptLogging);
|
|
#endif
|
|
}
|
|
|
|
/*=========================*/
|
|
/* Fellow lifecycle events */
|
|
/*=========================*/
|
|
|
|
void cpuIntegrationSaveState(FILE *F)
|
|
{
|
|
cpuSaveState(F);
|
|
|
|
fwrite(&cpu_integration_chip_slowdown, sizeof(cpu_integration_chip_slowdown), 1, F);
|
|
// Everything else is configuration options which will be set when the associated config-file is loaded.
|
|
}
|
|
|
|
void cpuIntegrationLoadState(FILE *F)
|
|
{
|
|
cpuLoadState(F);
|
|
|
|
fread(&cpu_integration_chip_slowdown, sizeof(cpu_integration_chip_slowdown), 1, F);
|
|
// Everything else is configuration options which will be set when the associated config-file is loaded.
|
|
}
|
|
|
|
void cpuIntegrationEmulationStart(void)
|
|
{
|
|
cpuIntegrationCalculateMultiplier();
|
|
}
|
|
|
|
void cpuIntegrationEmulationStop(void)
|
|
{
|
|
}
|
|
|
|
void cpuIntegrationHardReset(void)
|
|
{
|
|
cpuIntegrationSetChipCycles(0);
|
|
cpuIntegrationSetChipSlowdown(1);
|
|
cpuSetInitialPC(memoryInitialPC());
|
|
cpuSetInitialSP(memoryInitialSP());
|
|
cpuHardReset();
|
|
}
|
|
|
|
void cpuIntegrationStartup(void)
|
|
{
|
|
cpuStartup();
|
|
cpuIntegrationSetDefaultConfig();
|
|
cpuCreateMulTimeTables();
|
|
}
|
|
|
|
void cpuIntegrationShutdown(void)
|
|
{
|
|
cpuProfileWrite();
|
|
}
|