Cog/Frameworks/lazyusf2/lazyusf2/ri/rdram.c

118 lines
3.8 KiB
C

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Mupen64plus - rdram.c *
* Mupen64Plus homepage: http://code.google.com/p/mupen64plus/ *
* Copyright (C) 2014 Bobby Smiles *
* *
* 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 "usf/usf.h"
#include "usf/usf_internal.h"
#include "usf/barray.h"
#include "rdram.h"
#include "ri_controller.h"
#include "memory/memory.h"
#include <string.h>
void connect_rdram(struct rdram* rdram,
uint32_t* dram,
size_t dram_size)
{
rdram->dram = dram;
rdram->dram_size = dram_size;
}
void init_rdram(struct rdram* rdram)
{
memset(rdram->regs, 0, RDRAM_REGS_COUNT*sizeof(uint32_t));
memset(rdram->dram, 0, rdram->dram_size);
}
int read_rdram_regs(void* opaque, uint32_t address, uint32_t* value)
{
struct ri_controller* ri = (struct ri_controller*)opaque;
uint32_t reg = rdram_reg(address);
*value = ri->rdram.regs[reg];
return 0;
}
int write_rdram_regs(void* opaque, uint32_t address, uint32_t value, uint32_t mask)
{
struct ri_controller* ri = (struct ri_controller*)opaque;
uint32_t reg = rdram_reg(address);
masked_write(&ri->rdram.regs[reg], value, mask);
return 0;
}
int read_rdram_dram(void* opaque, uint32_t address, uint32_t* value)
{
struct ri_controller* ri = (struct ri_controller*)opaque;
uint32_t addr = rdram_dram_address(address);
*value = ri->rdram.dram[addr];
return 0;
}
int write_rdram_dram(void* opaque, uint32_t address, uint32_t value, uint32_t mask)
{
struct ri_controller* ri = (struct ri_controller*)opaque;
uint32_t addr = rdram_dram_address(address);
masked_write(&ri->rdram.dram[addr], value, mask);
return 0;
}
int read_rdram_dram_tracked(void* opaque, uint32_t address, uint32_t* value)
{
usf_state_t* state = (usf_state_t*) opaque;
struct ri_controller* ri = &state->g_ri;
uint32_t addr = rdram_dram_address(address);
if (!bit_array_test(state->barray_ram_written_first, addr))
bit_array_set(state->barray_ram_read, addr);
*value = ri->rdram.dram[addr];
return 0;
}
int write_rdram_dram_tracked(void* opaque, uint32_t address, uint32_t value, uint32_t mask)
{
usf_state_t* state = (usf_state_t*) opaque;
struct ri_controller* ri = &state->g_ri;
uint32_t addr = rdram_dram_address(address);
if (mask == 0xFFFFFFFFU && !bit_array_test(state->barray_ram_read, addr))
bit_array_set(state->barray_ram_written_first, addr);
masked_write(&ri->rdram.dram[addr], value, mask);
return 0;
}