--- /dev/null
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Mupen64plus - dma.c *
+ * Mupen64Plus homepage: http://code.google.com/p/mupen64plus/ *
+ * Copyright (C) 2002 Hacktarux *
+ * *
+ * 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., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "api/m64p_types.h"
+
+#include "dma.h"
+#include "memory.h"
+#include "pif.h"
+#include "flashram.h"
+
+#include "r4300/r4300.h"
+#include "r4300/interupt.h"
+#include "r4300/macros.h"
+#include "r4300/ops.h"
+#include "../r4300/new_dynarec/new_dynarec.h"
+
+#define M64P_CORE_PROTOTYPES 1
+#include "api/m64p_config.h"
+#include "api/config.h"
+#include "api/callbacks.h"
+#include "main/main.h"
+#include "main/rom.h"
+#include "main/util.h"
+
+static unsigned char sram[0x8000];
+
+static char *get_sram_path(void)
+{
+ return formatstr("%s%s.sra", get_savesrampath(), ROM_SETTINGS.goodname);
+}
+
+static void sram_format(void)
+{
+ memset(sram, 0, sizeof(sram));
+}
+
+static void sram_read_file(void)
+{
+ char *filename = get_sram_path();
+
+ sram_format();
+ switch (read_from_file(filename, sram, sizeof(sram)))
+ {
+ case file_open_error:
+ DebugMessage(M64MSG_VERBOSE, "couldn't open sram file '%s' for reading", filename);
+ sram_format();
+ break;
+ case file_read_error:
+ DebugMessage(M64MSG_WARNING, "fread() failed on 32kb read from sram file '%s'", filename);
+ sram_format();
+ break;
+ default: break;
+ }
+
+ free(filename);
+}
+
+static void sram_write_file(void)
+{
+ char *filename = get_sram_path();
+
+ switch (write_to_file(filename, sram, sizeof(sram)))
+ {
+ case file_open_error:
+ DebugMessage(M64MSG_WARNING, "couldn't open sram file '%s' for writing.", filename);
+ break;
+ case file_write_error:
+ DebugMessage(M64MSG_WARNING, "fwrite() failed on 32kb write to sram file '%s'", filename);
+ break;
+ default: break;
+ }
+
+ free(filename);
+}
+
+void dma_pi_read(void)
+{
+ unsigned int i;
+
+ if (pi_register.pi_cart_addr_reg >= 0x08000000
+ && pi_register.pi_cart_addr_reg < 0x08010000)
+ {
+ if (flashram_info.use_flashram != 1)
+ {
+ sram_read_file();
+
+ 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];
+ }
+
+ sram_write_file();
+
+ flashram_info.use_flashram = -1;
+ }
+ else
+ {
+ dma_write_flashram();
+ }
+ }
+ else
+ {
+ DebugMessage(M64MSG_WARNING, "Unknown dma read in dma_pi_read()");
+ }
+
+ 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(void)
+{
+ 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 (flashram_info.use_flashram != 1)
+ {
+ int i;
+
+ sram_read_file();
+
+ for (i=0; i<(int)(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];
+ }
+
+ flashram_info.use_flashram = -1;
+ }
+ else
+ {
+ dma_read_flashram();
+ }
+ }
+ else if (pi_register.pi_cart_addr_reg >= 0x06000000
+ && pi_register.pi_cart_addr_reg < 0x08000000)
+ {
+ }
+ else
+ {
+ DebugMessage(M64MSG_WARNING, "Unknown dma write 0x%x in dma_pi_write()", (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 + (int) longueur) > rom_size ?
+ (rom_size - i) : longueur;
+ longueur = (pi_register.pi_dram_addr_reg + longueur) > 0x7FFFFF ?
+ (0x7FFFFF - pi_register.pi_dram_addr_reg) : longueur;
+
+ if (i>rom_size || 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 (r4300emu != CORE_PURE_INTERPRETER)
+ {
+ for (i=0; i<(int)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] ||
+ blocks[rdram_address1>>12]->block[(rdram_address1&0xFFF)/4].ops !=
+ current_instruction_table.NOTCOMPILED)
+ {
+ invalid_code[rdram_address1>>12] = 1;
+ }
+#ifdef NEW_DYNAREC
+ invalidate_block(rdram_address1>>12);
+#endif
+ }
+ if (!invalid_code[rdram_address2>>12])
+ {
+ if (!blocks[rdram_address1>>12] ||
+ blocks[rdram_address2>>12]->block[(rdram_address2&0xFFF)/4].ops !=
+ current_instruction_table.NOTCOMPILED)
+ {
+ invalid_code[rdram_address2>>12] = 1;
+ }
+ }
+ }
+ }
+ else
+ {
+ for (i=0; i<(int)longueur; i++)
+ {
+ ((unsigned char*)rdram)[(pi_register.pi_dram_addr_reg+i)^S8]=
+ rom[(((pi_register.pi_cart_addr_reg-0x10000000)&0x3FFFFFF)+i)^S8];
+ }
+ }
+
+ // Set the RDRAM memory size when copying main ROM code
+ // (This is just a convenient way to run this code once at the beginning)
+ if (pi_register.pi_cart_addr_reg == 0x10001000)
+ {
+ switch (CIC_Chip)
+ {
+ case 1:
+ case 2:
+ case 3:
+ case 6:
+ {
+ if (ConfigGetParamInt(g_CoreConfig, "DisableExtraMem"))
+ {
+ rdram[0x318/4] = 0x400000;
+ }
+ else
+ {
+ rdram[0x318/4] = 0x800000;
+ }
+ break;
+ }
+ case 5:
+ {
+ if (ConfigGetParamInt(g_CoreConfig, "DisableExtraMem"))
+ {
+ rdram[0x3F0/4] = 0x400000;
+ }
+ else
+ {
+ 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(void)
+{
+ unsigned int i,j;
+
+ unsigned int l = sp_register.sp_rd_len_reg;
+
+ unsigned int length = ((l & 0xfff) | 7) + 1;
+ unsigned int count = ((l >> 12) & 0xff) + 1;
+ unsigned int skip = ((l >> 20) & 0xfff);
+
+ unsigned int memaddr = sp_register.sp_mem_addr_reg & 0xfff;
+ unsigned int dramaddr = sp_register.sp_dram_addr_reg & 0xffffff;
+
+ unsigned char *spmem = ((sp_register.sp_mem_addr_reg & 0x1000) != 0) ? (unsigned char*)SP_IMEM : (unsigned char*)SP_DMEM;
+ unsigned char *dram = (unsigned char*)rdram;
+
+ for(j=0; j<count; j++) {
+ for(i=0; i<length; i++) {
+ spmem[memaddr^S8] = dram[dramaddr^S8];
+ memaddr++;
+ dramaddr++;
+ }
+ dramaddr+=skip;
+ }
+}
+
+void dma_sp_read(void)
+{
+ unsigned int i,j;
+
+ unsigned int l = sp_register.sp_wr_len_reg;
+
+ unsigned int length = ((l & 0xfff) | 7) + 1;
+ unsigned int count = ((l >> 12) & 0xff) + 1;
+ unsigned int skip = ((l >> 20) & 0xfff);
+
+ unsigned int memaddr = sp_register.sp_mem_addr_reg & 0xfff;
+ unsigned int dramaddr = sp_register.sp_dram_addr_reg & 0xffffff;
+
+ unsigned char *spmem = ((sp_register.sp_mem_addr_reg & 0x1000) != 0) ? (unsigned char*)SP_IMEM : (unsigned char*)SP_DMEM;
+ unsigned char *dram = (unsigned char*)rdram;
+
+ for(j=0; j<count; j++) {
+ for(i=0; i<length; i++) {
+ dram[dramaddr^S8] = spmem[memaddr^S8];
+ memaddr++;
+ dramaddr++;
+ }
+ dramaddr+=skip;
+ }
+}
+
+void dma_si_write(void)
+{
+ int i;
+
+ if (si_register.si_pif_addr_wr64b != 0x1FC007C0)
+ {
+ DebugMessage(M64MSG_ERROR, "dma_si_write(): unknown SI use");
+ 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(void)
+{
+ int i;
+
+ if (si_register.si_pif_addr_rd64b != 0x1FC007C0)
+ {
+ DebugMessage(M64MSG_ERROR, "dma_si_read(): unknown SI use");
+ 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);
+}
+
notaz.gp2x.de / mupen64plus-pandora.git / blobdiff