| 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 | |