--- /dev/null
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Mupen64plus - flashram.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 <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "memory.h"
+#include "flashram.h"
+
+#include "r4300/r4300.h"
+
+#include "api/m64p_types.h"
+#include "api/callbacks.h"
+#include "main/main.h"
+#include "main/rom.h"
+#include "main/util.h"
+
+Flashram_info flashram_info;
+
+typedef enum flashram_mode
+{
+ NOPES_MODE = 0,
+ ERASE_MODE,
+ WRITE_MODE,
+ READ_MODE,
+ STATUS_MODE
+} Flashram_mode;
+
+static unsigned char flashram[0x20000];
+
+static char *get_flashram_path(void)
+{
+ return formatstr("%s%s.fla", get_savesrampath(), ROM_SETTINGS.goodname);
+}
+
+static void flashram_format(void)
+{
+ memset(flashram, 0xff, sizeof(flashram));
+}
+
+static void flashram_read_file(void)
+{
+ char *filename = get_flashram_path();
+
+ flashram_format();
+ switch (read_from_file(filename, flashram, sizeof(flashram)))
+ {
+ case file_open_error:
+ DebugMessage(M64MSG_WARNING, "couldn't open flash ram file '%s' for reading", filename);
+ flashram_format();
+ break;
+ case file_read_error:
+ DebugMessage(M64MSG_WARNING, "couldn't read 128kb flash ram file '%s'", filename);
+ break;
+ default: break;
+ }
+
+ free(filename);
+}
+
+static void flashram_write_file(void)
+{
+ char *filename = get_flashram_path();
+
+ switch (write_to_file(filename, flashram, sizeof(flashram)))
+ {
+ case file_open_error:
+ DebugMessage(M64MSG_WARNING, "couldn't open flash ram file '%s' for writing", filename);
+ break;
+ case file_write_error:
+ DebugMessage(M64MSG_WARNING, "couldn't write 128kb flash ram file '%s'", filename);
+ break;
+ default: break;
+ }
+
+ free(filename);
+}
+
+void init_flashram(void)
+{
+ flashram_info.mode = NOPES_MODE;
+ flashram_info.status = 0;
+}
+
+unsigned int flashram_status(void)
+{
+ return (unsigned int) (flashram_info.status >> 32);
+}
+
+void flashram_command(unsigned int command)
+{
+ switch (command & 0xff000000)
+ {
+ case 0x4b000000:
+ flashram_info.erase_offset = (command & 0xffff) * 128;
+ break;
+ case 0x78000000:
+ flashram_info.mode = ERASE_MODE;
+ flashram_info.status = 0x1111800800c20000LL;
+ break;
+ case 0xa5000000:
+ flashram_info.erase_offset = (command & 0xffff) * 128;
+ flashram_info.status = 0x1111800400c20000LL;
+ break;
+ case 0xb4000000:
+ flashram_info.mode = WRITE_MODE;
+ break;
+ case 0xd2000000: // execute
+ switch (flashram_info.mode)
+ {
+ case NOPES_MODE:
+ break;
+ case ERASE_MODE:
+ {
+ unsigned int i;
+ flashram_read_file();
+ for (i=flashram_info.erase_offset; i<(flashram_info.erase_offset+128); i++)
+ {
+ flashram[i^S8] = 0xff;
+ }
+ flashram_write_file();
+ }
+ break;
+ case WRITE_MODE:
+ {
+ int i;
+ flashram_read_file();
+ for (i=0; i<128; i++)
+ {
+ flashram[(flashram_info.erase_offset+i)^S8]=
+ ((unsigned char*)rdram)[(flashram_info.write_pointer+i)^S8];
+ }
+ flashram_write_file();
+ }
+ break;
+ case STATUS_MODE:
+ break;
+ default:
+ DebugMessage(M64MSG_WARNING, "unknown flashram command with mode:%x", (int)flashram_info.mode);
+ stop=1;
+ break;
+ }
+ flashram_info.mode = NOPES_MODE;
+ break;
+ case 0xe1000000:
+ flashram_info.mode = STATUS_MODE;
+ flashram_info.status = 0x1111800100c20000LL;
+ break;
+ case 0xf0000000:
+ flashram_info.mode = READ_MODE;
+ flashram_info.status = 0x11118004f0000000LL;
+ break;
+ default:
+ DebugMessage(M64MSG_WARNING, "unknown flashram command: %x", (int)command);
+ break;
+ }
+}
+
+void dma_read_flashram(void)
+{
+ unsigned int i;
+
+ switch (flashram_info.mode)
+ {
+ case STATUS_MODE:
+ rdram[pi_register.pi_dram_addr_reg/4] = (unsigned int)(flashram_info.status >> 32);
+ rdram[pi_register.pi_dram_addr_reg/4+1] = (unsigned int)(flashram_info.status);
+ break;
+ case READ_MODE:
+ flashram_read_file();
+ for (i=0; i<(pi_register.pi_wr_len_reg & 0x0FFFFFF)+1; i++)
+ {
+ ((unsigned char*)rdram)[(pi_register.pi_dram_addr_reg+i)^S8]=
+ flashram[(((pi_register.pi_cart_addr_reg-0x08000000)&0xFFFF)*2+i)^S8];
+ }
+ break;
+ default:
+ DebugMessage(M64MSG_WARNING, "unknown dma_read_flashram: %x", flashram_info.mode);
+ stop=1;
+ break;
+ }
+}
+
+void dma_write_flashram(void)
+{
+ switch (flashram_info.mode)
+ {
+ case WRITE_MODE:
+ flashram_info.write_pointer = pi_register.pi_dram_addr_reg;
+ break;
+ default:
+ DebugMessage(M64MSG_ERROR, "unknown dma_write_flashram: %x", flashram_info.mode);
+ stop=1;
+ break;
+ }
+}
+
notaz.gp2x.de / mupen64plus-pandora.git / blobdiff