91 lines
3 KiB
C
91 lines
3 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Mupen64plus - cart_rom.c *
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* Mupen64Plus homepage: http://code.google.com/p/mupen64plus/ *
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* Copyright (C) 2014 Bobby Smiles *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#include "usf/usf.h"
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#include "usf/usf_internal.h"
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#include "usf/barray.h"
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#include "cart_rom.h"
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#include "pi_controller.h"
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void connect_cart_rom(struct cart_rom* cart_rom,
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uint8_t* rom, size_t rom_size)
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{
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cart_rom->rom = rom;
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cart_rom->rom_size = rom_size;
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}
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void init_cart_rom(struct cart_rom* cart_rom)
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{
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cart_rom->last_write = 0;
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}
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int read_cart_rom(void* opaque, uint32_t address, uint32_t* value)
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{
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struct pi_controller* pi = (struct pi_controller*)opaque;
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uint32_t addr = rom_address(address);
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if (pi->cart_rom.last_write != 0)
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{
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*value = pi->cart_rom.last_write;
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pi->cart_rom.last_write = 0;
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}
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else
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{
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*value = *(uint32_t*)(pi->cart_rom.rom + addr);
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}
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return 0;
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}
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int write_cart_rom(void* opaque, uint32_t address, uint32_t value, uint32_t mask)
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{
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struct pi_controller* pi = (struct pi_controller*)opaque;
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pi->cart_rom.last_write = value & mask;
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return 0;
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}
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int read_cart_rom_tracked(void* opaque, uint32_t address, uint32_t* value)
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{
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usf_state_t* state = (usf_state_t*)opaque;
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struct pi_controller* pi = &state->g_pi;
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uint32_t addr = rom_address(address);
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if (pi->cart_rom.last_write != 0)
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{
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*value = pi->cart_rom.last_write;
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pi->cart_rom.last_write = 0;
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}
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else
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{
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bit_array_set(state->barray_rom, addr / 4);
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*value = *(uint32_t*)(pi->cart_rom.rom + addr);
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}
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return 0;
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}
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