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mupen64plus-oldsvn/memory/dma.c

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/**
* Mupen64 - dma.c
* Copyright (C) 2002 Hacktarux
*
* Mupen64 homepage: http://mupen64.emulation64.com
* email address: hacktarux@yahoo.fr
*
* If you want to contribute to the project please contact
* me first (maybe someone is already making what you are
* planning to do).
*
*
* This program is free software; you can redistribute it and/
* or modify it under the terms of the GNU General Public Li-
* cence as published by the Free Software Foundation; either
* version 2 of the Licence, or any later version.
*
* This program is distributed in the hope that it will be use-
* ful, but WITHOUT ANY WARRANTY; without even the implied war-
* ranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public Licence for more details.
*
* You should have received a copy of the GNU General Public
* Licence along with this program; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
* USA.
*
**/
#include "dma.h"
#include "memory.h"
#include "../main/main.h"
#include "../main/rom.h"
#include <stdio.h>
#include "../r4300/r4300.h"
#include "../r4300/interupt.h"
#include "../r4300/macros.h"
#include <malloc.h>
#include "pif.h"
#include "flashram.h"
#include "../main/guifuncs.h"
#include "../r4300/ops.h"
static unsigned char sram[0x8000];
void dma_pi_read()
{
int i;
if (pi_register.pi_cart_addr_reg >= 0x08000000 &&
pi_register.pi_cart_addr_reg < 0x08010000)
{
if (use_flashram != 1)
{
char *filename;
FILE *f;
filename = malloc(strlen(get_savespath())+
strlen(ROM_SETTINGS.goodname)+4+1);
strcpy(filename, get_savespath());
strcat(filename, ROM_SETTINGS.goodname);
strcat(filename, ".sra");
f = fopen(filename, "rb");
if (f)
{
fread(sram, 1, 0x8000, f);
fclose(f);
}
else for (i=0; i<0x8000; i++) sram[i] = 0;
for (i=0; i<(pi_register.pi_rd_len_reg & 0xFFFFFF)+1; i++)
sram[((pi_register.pi_cart_addr_reg-0x08000000)+i)^S8]=
((unsigned char*)rdram)[(pi_register.pi_dram_addr_reg+i)^S8];
f = fopen(filename, "wb");
if (f == NULL)
{
printf("Warning: couldn't open flash ram file '%s' for writing.\n", filename);
}
else
{
fwrite(sram, 1, 0x8000, f);
fclose(f);
}
free(filename);
use_flashram = -1;
}
else
dma_write_flashram();
}
else
printf("unknown dma read\n");
pi_register.read_pi_status_reg |= 1;
update_count();
add_interupt_event(PI_INT, 0x1000/*pi_register.pi_rd_len_reg*/);
}
void dma_pi_write()
{
unsigned int longueur;
int i;
if (pi_register.pi_cart_addr_reg < 0x10000000)
{
if (pi_register.pi_cart_addr_reg >= 0x08000000 &&
pi_register.pi_cart_addr_reg < 0x08010000)
{
if (use_flashram != 1)
{
char *filename;
FILE *f;
int i;
filename = malloc(strlen(get_savespath())+
strlen(ROM_SETTINGS.goodname)+4+1);
strcpy(filename, get_savespath());
strcat(filename, ROM_SETTINGS.goodname);
strcat(filename, ".sra");
f = fopen(filename, "rb");
if (f)
{
fread(sram, 1, 0x8000, f);
fclose(f);
}
else for (i=0; i<0x8000; i++) sram[i] = 0x0;
free(filename);
for (i=0; i<(pi_register.pi_wr_len_reg & 0xFFFFFF)+1; i++)
((unsigned char*)rdram)[(pi_register.pi_dram_addr_reg+i)^S8]=
sram[(((pi_register.pi_cart_addr_reg-0x08000000)&0xFFFF)+i)^S8];
use_flashram = -1;
}
else
dma_read_flashram();
}
else if (pi_register.pi_cart_addr_reg >= 0x06000000 &&
pi_register.pi_cart_addr_reg < 0x08000000)
{
}
else
printf("unknown dma write:%x\n", (int)pi_register.pi_cart_addr_reg);
pi_register.read_pi_status_reg |= 1;
update_count();
add_interupt_event(PI_INT, /*pi_register.pi_wr_len_reg*/0x1000);
return;
}
if (pi_register.pi_cart_addr_reg >= 0x1fc00000) // for paper mario
{
pi_register.read_pi_status_reg |= 1;
update_count();
add_interupt_event(PI_INT, 0x1000);
return;
}
longueur = (pi_register.pi_wr_len_reg & 0xFFFFFF)+1;
i = (pi_register.pi_cart_addr_reg-0x10000000)&0x3FFFFFF;
longueur = (i + longueur) > taille_rom ?
(taille_rom - i) : longueur;
longueur = (pi_register.pi_dram_addr_reg + longueur) > 0x7FFFFF ?
(0x7FFFFF - pi_register.pi_dram_addr_reg) : longueur;
if(i>taille_rom || pi_register.pi_dram_addr_reg > 0x7FFFFF)
{
pi_register.read_pi_status_reg |= 3;
update_count();
add_interupt_event(PI_INT, longueur/8);
return;
}
if(!interpcore)
{
for (i=0; i<longueur; i++)
{
unsigned long rdram_address1 = pi_register.pi_dram_addr_reg+i+0x80000000;
unsigned long rdram_address2 = pi_register.pi_dram_addr_reg+i+0xa0000000;
((unsigned char*)rdram)[(pi_register.pi_dram_addr_reg+i)^S8]=
rom[(((pi_register.pi_cart_addr_reg-0x10000000)&0x3FFFFFF)+i)^S8];
if(!invalid_code[rdram_address1>>12])
if(blocks[rdram_address1>>12]->block[(rdram_address1&0xFFF)/4].ops != NOTCOMPILED)
invalid_code[rdram_address1>>12] = 1;
if(!invalid_code[rdram_address2>>12])
if(blocks[rdram_address2>>12]->block[(rdram_address2&0xFFF)/4].ops != NOTCOMPILED)
invalid_code[rdram_address2>>12] = 1;
}
}
else
{
for (i=0; i<longueur; i++)
{
((unsigned char*)rdram)[(pi_register.pi_dram_addr_reg+i)^S8]=
rom[(((pi_register.pi_cart_addr_reg-0x10000000)&0x3FFFFFF)+i)^S8];
}
}
/*for (i=0; i<=((longueur+0x800)>>12); i++)
invalid_code[(((pi_register.pi_dram_addr_reg&0xFFFFFF)|0x80000000)>>12)+i] = 1;*/
if ((debug_count+Count) < 0x100000)
{
switch(CIC_Chip)
{
case 1:
case 2:
case 3:
case 6:
rdram[0x318/4] = 0x800000;
break;
case 5:
rdram[0x3F0/4] = 0x800000;
break;
}
}
pi_register.read_pi_status_reg |= 3;
update_count();
add_interupt_event(PI_INT, longueur/8);
return;
}
void dma_sp_write()
{
int i;
if ((sp_register.sp_mem_addr_reg & 0x1000) > 0)
{
for (i=0; i<((sp_register.sp_rd_len_reg & 0xFFF)+1); i++)
((unsigned char *)(SP_IMEM))[((sp_register.sp_mem_addr_reg & 0xFFF)+i)^S8]=
((unsigned char *)(rdram))[((sp_register.sp_dram_addr_reg & 0xFFFFFF)+i)^S8];
}
else
{
for (i=0; i<((sp_register.sp_rd_len_reg & 0xFFF)+1); i++)
((unsigned char *)(SP_DMEM))[((sp_register.sp_mem_addr_reg & 0xFFF)+i)^S8]=
((unsigned char *)(rdram))[((sp_register.sp_dram_addr_reg & 0xFFFFFF)+i)^S8];
}
}
void dma_sp_read()
{
int i;
if ((sp_register.sp_mem_addr_reg & 0x1000) > 0)
{
for (i=0; i<((sp_register.sp_wr_len_reg & 0xFFF)+1); i++)
((unsigned char *)(rdram))[((sp_register.sp_dram_addr_reg & 0xFFFFFF)+i)^S8]=
((unsigned char *)(SP_IMEM))[((sp_register.sp_mem_addr_reg & 0xFFF)+i)^S8];
}
else
{
for (i=0; i<((sp_register.sp_wr_len_reg & 0xFFF)+1); i++)
((unsigned char *)(rdram))[((sp_register.sp_dram_addr_reg & 0xFFFFFF)+i)^S8]=
((unsigned char *)(SP_DMEM))[((sp_register.sp_mem_addr_reg & 0xFFF)+i)^S8];
}
}
void dma_si_write()
{
int i;
if (si_register.si_pif_addr_wr64b != 0x1FC007C0)
{
printf("unknown SI use\n");
stop=1;
}
for (i=0; i<(64/4); i++)
PIF_RAM[i] = sl(rdram[si_register.si_dram_addr/4+i]);
update_pif_write();
update_count();
add_interupt_event(SI_INT, /*0x100*/0x900);
}
void dma_si_read()
{
int i;
if (si_register.si_pif_addr_rd64b != 0x1FC007C0)
{
printf("unknown SI use\n");
stop=1;
}
update_pif_read();
for (i=0; i<(64/4); i++)
rdram[si_register.si_dram_addr/4+i] = sl(PIF_RAM[i]);
update_count();
add_interupt_event(SI_INT, /*0x100*/0x900);
}
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