[mupen64plus-pandora.git] / source / mupen64plus-core / src / memory / flashram.c

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *   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;
    }
}
Commit	Line	Data
451ab91e	1	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	2	* Mupen64plus - flashram.c *
	3	* Mupen64Plus homepage: http://code.google.com/p/mupen64plus/ *
	4	* Copyright (C) 2002 Hacktarux *
	5	* *
	6	* This program is free software; you can redistribute it and/or modify *
	7	* it under the terms of the GNU General Public License as published by *
	8	* the Free Software Foundation; either version 2 of the License, or *
	9	* (at your option) any later version. *
	10	* *
	11	* This program is distributed in the hope that it will be useful, *
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
	14	* GNU General Public License for more details. *
	15	* *
	16	* You should have received a copy of the GNU General Public License *
	17	* along with this program; if not, write to the *
	18	* Free Software Foundation, Inc., *
	19	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
	20	* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
	21
	22	#include <stdio.h>
	23	#include <string.h>
	24	#include <stdlib.h>
	25
	26	#include "memory.h"
	27	#include "flashram.h"
	28
	29	#include "r4300/r4300.h"
	30
	31	#include "api/m64p_types.h"
	32	#include "api/callbacks.h"
	33	#include "main/main.h"
	34	#include "main/rom.h"
	35	#include "main/util.h"
	36
	37	Flashram_info flashram_info;
	38
	39	typedef enum flashram_mode
	40	{
	41	NOPES_MODE = 0,
	42	ERASE_MODE,
	43	WRITE_MODE,
	44	READ_MODE,
	45	STATUS_MODE
	46	} Flashram_mode;
	47
	48	static unsigned char flashram[0x20000];
	49
	50	static char *get_flashram_path(void)
	51	{
	52	return formatstr("%s%s.fla", get_savesrampath(), ROM_SETTINGS.goodname);
	53	}
	54
	55	static void flashram_format(void)
	56	{
	57	memset(flashram, 0xff, sizeof(flashram));
	58	}
	59
	60	static void flashram_read_file(void)
	61	{
	62	char *filename = get_flashram_path();
	63
	64	flashram_format();
65	switch (read_from_file(filename, flashram, sizeof(flashram)))
66	{
67	case file_open_error:
68	DebugMessage(M64MSG_WARNING, "couldn't open flash ram file '%s' for reading", filename);
69	flashram_format();
70	break;
71	case file_read_error:
72	DebugMessage(M64MSG_WARNING, "couldn't read 128kb flash ram file '%s'", filename);
73	break;
74	default: break;
75	}
76
77	free(filename);
78	}
79
80	static void flashram_write_file(void)
81	{
82	char *filename = get_flashram_path();
83
84	switch (write_to_file(filename, flashram, sizeof(flashram)))
85	{
86	case file_open_error:
87	DebugMessage(M64MSG_WARNING, "couldn't open flash ram file '%s' for writing", filename);
88	break;
89	case file_write_error:
90	DebugMessage(M64MSG_WARNING, "couldn't write 128kb flash ram file '%s'", filename);
91	break;
92	default: break;
93	}
94
95	free(filename);
96	}
97
98	void init_flashram(void)
99	{
100	flashram_info.mode = NOPES_MODE;
101	flashram_info.status = 0;
102	}
103
104	unsigned int flashram_status(void)
105	{
106	return (unsigned int) (flashram_info.status >> 32);
107	}
108
109	void flashram_command(unsigned int command)
110	{
111	switch (command & 0xff000000)
112	{
113	case 0x4b000000:
114	flashram_info.erase_offset = (command & 0xffff) * 128;
115	break;
116	case 0x78000000:
117	flashram_info.mode = ERASE_MODE;
118	flashram_info.status = 0x1111800800c20000LL;
119	break;
120	case 0xa5000000:
121	flashram_info.erase_offset = (command & 0xffff) * 128;
122	flashram_info.status = 0x1111800400c20000LL;
123	break;
124	case 0xb4000000:
125	flashram_info.mode = WRITE_MODE;
126	break;
127	case 0xd2000000: // execute
128	switch (flashram_info.mode)
129	{
130	case NOPES_MODE:
131	break;
132	case ERASE_MODE:
133	{
134	unsigned int i;
135	flashram_read_file();
136	for (i=flashram_info.erase_offset; i<(flashram_info.erase_offset+128); i++)
137	{
138	flashram[i^S8] = 0xff;
139	}
140	flashram_write_file();
141	}
142	break;
143	case WRITE_MODE:
144	{
145	int i;
146	flashram_read_file();
147	for (i=0; i<128; i++)
148	{
149	flashram[(flashram_info.erase_offset+i)^S8]=
150	((unsigned char*)rdram)[(flashram_info.write_pointer+i)^S8];
151	}
152	flashram_write_file();
153	}
154	break;
155	case STATUS_MODE:
156	break;
157	default:
158	DebugMessage(M64MSG_WARNING, "unknown flashram command with mode:%x", (int)flashram_info.mode);
159	stop=1;
160	break;
161	}
162	flashram_info.mode = NOPES_MODE;
163	break;
164	case 0xe1000000:
165	flashram_info.mode = STATUS_MODE;
166	flashram_info.status = 0x1111800100c20000LL;
167	break;
168	case 0xf0000000:
169	flashram_info.mode = READ_MODE;
170	flashram_info.status = 0x11118004f0000000LL;
171	break;
172	default:
173	DebugMessage(M64MSG_WARNING, "unknown flashram command: %x", (int)command);
174	break;
175	}
176	}
177
178	void dma_read_flashram(void)
179	{
180	unsigned int i;
181
182	switch (flashram_info.mode)
183	{
184	case STATUS_MODE:
185	rdram[pi_register.pi_dram_addr_reg/4] = (unsigned int)(flashram_info.status >> 32);
186	rdram[pi_register.pi_dram_addr_reg/4+1] = (unsigned int)(flashram_info.status);
187	break;
188	case READ_MODE:
189	flashram_read_file();
190	for (i=0; i<(pi_register.pi_wr_len_reg & 0x0FFFFFF)+1; i++)
191	{
192	((unsigned char*)rdram)[(pi_register.pi_dram_addr_reg+i)^S8]=
193	flashram[(((pi_register.pi_cart_addr_reg-0x08000000)&0xFFFF)*2+i)^S8];
194	}
195	break;
196	default:
197	DebugMessage(M64MSG_WARNING, "unknown dma_read_flashram: %x", flashram_info.mode);
198	stop=1;
199	break;
200	}
201	}
202
203	void dma_write_flashram(void)
204	{
205	switch (flashram_info.mode)
206	{
207	case WRITE_MODE:
208	flashram_info.write_pointer = pi_register.pi_dram_addr_reg;
209	break;
210	default:
211	DebugMessage(M64MSG_ERROR, "unknown dma_write_flashram: %x", flashram_info.mode);
212	stop=1;
213	break;
214	}
215	}
216