/*====================================================================
filename: gdsp_interpreter.cpp
project: GCemu
created: 2004-6-18
mail: duddie@walla.com
Copyright (c) 2005 Duddie & Tratax
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.
====================================================================*/
#include <stdio.h>
#include <stdlib.h>
#include "gdsp_interface.h"
#include "gdsp_opcodes_helper.h"
#include "Tools.h"
//-------------------------------------------------------------------------------
SDSP g_dsp;
uint16 SDSP::r[32];
uint16 SDSP::pc = 0;
uint16 SDSP::err_pc = 0;
uint16* SDSP::iram = 0;
uint16* SDSP::dram = 0;
uint16* SDSP::irom = 0;
uint16* SDSP::drom = 0;
uint16* SDSP::coef = 0;
uint8* SDSP::cpu_ram = 0;
uint16 SDSP::cr = 0;
uint8 SDSP::reg_stack_ptr[4];
// lets make stack depth to 32 for now
uint16 SDSP::reg_stack[4][DSP_STACK_DEPTH];
void (*SDSP::irq_request)() = NULL;
bool SDSP::exception_in_progress_hack = false;
// for debugger only
uint32 SDSP::iram_crc = 0;
uint64 SDSP::step_counter = 0;
//-------------------------------------------------------------------------------
static bool CR_HALT = true;
static bool CR_EXTERNAL_INT = false;
void UpdateCachedCR()
{
CR_HALT = (g_dsp.cr & 0x4) != 0;
CR_EXTERNAL_INT = (g_dsp.cr & 0x02) != 0;
}
//-------------------------------------------------------------------------------
void (*dsp_op[])(uint16 opc) =
{
dsp_op0, dsp_op1, dsp_op2, dsp_op3,
dsp_op4, dsp_op5, dsp_op6, dsp_op7,
dsp_op8, dsp_op9, dsp_opab, dsp_opab,
dsp_opcd, dsp_opcd, dsp_ope, dsp_opf,
};
void dbg_error(char* err_msg)
{
return;
}
void gdsp_init()
{
g_dsp.irom = (uint16*)malloc(DSP_IROM_SIZE * sizeof(uint16));
g_dsp.iram = (uint16*)malloc(DSP_IRAM_SIZE * sizeof(uint16));
g_dsp.drom = (uint16*)malloc(DSP_DROM_SIZE * sizeof(uint16));
g_dsp.dram = (uint16*)malloc(DSP_DRAM_SIZE * sizeof(uint16));
g_dsp.coef = (uint16*)malloc(DSP_COEF_SIZE * sizeof(uint16));
for (int i = 0; i < DSP_IRAM_SIZE; i++)
{
g_dsp.iram[i] = 0x0021; // HALT opcode
}
for (int i = 0; i < DSP_DRAM_SIZE; i++)
{
g_dsp.dram[i] = 0x0021; // HALT opcode
}
for (int i = 0; i < 32; i++)
{
g_dsp.r[i] = 0;
}
for (int i = 0; i < 4; i++)
{
g_dsp.reg_stack_ptr[i] = 0;
for (int j = 0; j < DSP_STACK_DEPTH; j++)
{
g_dsp.reg_stack[i][j] = 0;
}
}
// copied from a real console after the custom UCode has been loaded
g_dsp.r[0x08] = 0xffff;
g_dsp.r[0x09] = 0xffff;
g_dsp.r[0x0a] = 0xffff;
g_dsp.r[0x0b] = 0xffff;
g_dsp.cr = 0x804;
gdsp_ifx_init();
UpdateCachedCR();
}
void gdsp_reset()
{
// _assert_msg_(0, "gdsp_reset()");
_assert_msg_(MASTER_LOG, !g_dsp.exception_in_progress_hack, "assert while exception");
g_dsp.pc = DSP_RESET_VECTOR;
g_dsp.exception_in_progress_hack = false;
}
uint8 gdsp_exceptions = 0;
void gdsp_generate_exception(uint8 level)
{
gdsp_exceptions |= 1 << level;
}
bool gdsp_load_rom(char* fname)
{
FILE* pFile = fopen(fname, "rb");
if (pFile)
{
fread(g_dsp.irom, 1, DSP_IRAM_SIZE, pFile);
fclose(pFile);
return(true);
}
return(false);
}
bool gdsp_load_coef(char* fname)
{
FILE* pFile = fopen(fname, "rb");
if (pFile)
{
fread(g_dsp.coef, 1, DSP_COEF_SIZE, pFile);
fclose(pFile);
return(true);
}
return(false);
}
void gdsp_write_cr(uint16 val)
{
// reset
if (val & 0x0001)
{
gdsp_reset();
}
val &= ~0x0001;
// update cr
g_dsp.cr = val;
UpdateCachedCR();
}
uint16 gdsp_read_cr()
{
if (g_dsp.pc & 0x8000)
{
g_dsp.cr |= 0x800;
}
else
{
g_dsp.cr &= ~0x800;
}
UpdateCachedCR();
return(g_dsp.cr);
}
// special loop step.. because exception in loop or loopi fails
// dunno how we have to fix it
// atm we execute this instructions directly inside the loop command
// so it cant be interrupted by an exception
void gdsp_loop_step()
{
g_dsp.err_pc = g_dsp.pc;
uint16 opc = dsp_fetch_code();
dsp_op[opc >> 12](opc);
}
u16 HLE_ROM_80E7_81F8();
void hacks();
void gdsp_step()
{
g_dsp.step_counter++;
if (g_dsp.pc == 0x80e7)
{
//g_dsp.pc = HLE_ROM_80E7_81F8();
}
g_dsp.err_pc = g_dsp.pc;
#if PROFILE
ProfilerAddDelta(g_dsp.err_pc, 1);
if (g_dsp.step_counter == 1)
{
ProfilerInit();
}
if ((g_dsp.step_counter & 0xFFFFF) == 0)
{
ProfilerDump(g_dsp.step_counter);
}
#endif
uint16 opc = dsp_fetch_code();
dsp_op[opc >> 12](opc);
uint16& rLoopCounter = g_dsp.r[DSP_REG_ST0 + 3];
if (rLoopCounter > 0)
{
const uint16& rCallAddress = g_dsp.r[DSP_REG_ST0 + 0];
const uint16& rLoopAddress = g_dsp.r[DSP_REG_ST0 + 2];
if (g_dsp.pc == (rLoopAddress + 1))
{
rLoopCounter--;
if (rLoopCounter > 0)
{
g_dsp.pc = rCallAddress;
}
else
{
// end of loop
dsp_reg_load_stack(0);
dsp_reg_load_stack(2);
dsp_reg_load_stack(3);
}
}
}
// check if there is an external interrupt
if (CR_EXTERNAL_INT)
{
if (dsp_SR_is_flag_set(FLAG_ENABLE_INTERUPT) && (g_dsp.exception_in_progress_hack == false))
{
// level 7 is the interrupt exception
gdsp_generate_exception(7);
g_dsp.cr &= ~0x0002;
UpdateCachedCR();
}
}
// check exceptions
if ((gdsp_exceptions > 0) && (!g_dsp.exception_in_progress_hack))
{
for (uint8 i=0; i<8; i++)
{
if (gdsp_exceptions & (1<<i))
{
_assert_msg_(MASTER_LOG, !g_dsp.exception_in_progress_hack, "assert while exception");
dsp_reg_store_stack(DSP_STACK_C, g_dsp.pc);
dsp_reg_store_stack(DSP_STACK_D, g_dsp.r[R_SR]);
g_dsp.pc = i * 2;
gdsp_exceptions &= ~(1<<i);
g_dsp.exception_in_progress_hack = true;
break;
}
}
}
}
bool gdsp_running;
extern volatile uint32 dsp_running;
bool gdsp_run()
{
gdsp_running = true;
while (!CR_HALT)
{
gdsp_step();
}
gdsp_running = false;
return(true);
}
bool gdsp_runx(uint16 cnt)
{
gdsp_running = true;
while (!(g_dsp.cr & 0x4) && gdsp_running)
{
gdsp_step();
cnt--;
if (cnt == 0)
{
break;
}
}
gdsp_running = false;
return(true);
}
void gdsp_stop()
{
gdsp_running = false;
}
///////////////////////////////////////////////////////////////////////////////
//
// From fires for fires :)
//
//
#include "disassemble.h"
#include "WaveFile.h"
#include "Mixer.h"
uint16 r30 = 0, r31 = 0;
extern WaveFileWriter g_wave_writer;
extern uint16 dsp_swap16(uint16 x);
void Hacks()
{
// if (g_wave_writer.GetAudioSize() > 1024*1024*1)
/* if (g_dsp.pc == 0x165)
{
PanicAlert("Opcode_06");
}
if (g_dsp.pc == 0x43b)
{
PanicAlert("Opcode_14");
}
if (g_dsp.pc == 0xb37)
{
PanicAlert("Opcode_08");
}*/
/* if (g_dsp.pc == 0x1bc)
{
r30 = g_dsp.r[30];
r31 = g_dsp.r[31];
}
else if (g_dsp.pc == 0x384)
{
// if ((r30 == 0x1bc) && (r31 == 0xaff))
{
//PanicAlert("%x, %x", r30, r31);
const int numSamples = 0x280;
static short Buffer[numSamples];
uint16 bufferAddr = 0x280; //dsp_dmem_read(0xe44);
for (int i=0; i<numSamples; i++)
{
Buffer[i] = dsp_dmem_read(bufferAddr+i);
}
g_wave_writer.AddStereoSamples(Buffer, numSamples/2); // 2 channels
if (g_wave_writer.GetAudioSize() > 1024*1024*2)
{
//PanicAlert("%x", bufferAddr);
g_wave_writer.Stop();
exit(1);
}
}
} */
if (g_dsp.pc == 0x468)
{
int numSamples = g_dsp.r[25] / 2;
uint16 bufferAddr = g_dsp.r[27];
// PanicAlert("%x %x", bufferAddr, numSamples);
short samples[1024];
for (int i=0; i<numSamples; i++)
{
samples[i] = dsp_dmem_read(bufferAddr+i);
}
Mixer_PushSamples(samples, numSamples / 2, 32000); //sample_rate);
g_wave_writer.AddStereoSamples(samples, numSamples/2); // 2 channels
if (g_wave_writer.GetAudioSize() > 1024*1024*2)
{
//PanicAlert("%x", bufferAddr);
g_wave_writer.Stop();
exit(1);
}
}
}