/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *   Mupen64plus - rdram.h                                                 *
 *   Mupen64Plus homepage: https://mupen64plus.org/                        *
 *   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.          *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#ifndef M64P_DEVICE_RCP_RI_RDRAM_H
#define M64P_DEVICE_RCP_RI_RDRAM_H

#include <stddef.h>
#include <stdint.h>

#include "osal/preproc.h"

struct r4300_core;

enum rdram_registers
{
    RDRAM_CONFIG_REG,
    RDRAM_DEVICE_ID_REG,
    RDRAM_DELAY_REG,
    RDRAM_MODE_REG,
    RDRAM_REF_INTERVAL_REG,
    RDRAM_REF_ROW_REG,
    RDRAM_RAS_INTERVAL_REG,
    RDRAM_MIN_INTERVAL_REG,
    RDRAM_ADDR_SELECT_REG,
    RDRAM_DEVICE_MANUF_REG,
    RDRAM_REGS_COUNT
};

/* IPL3 rdram initialization accepts up to 8 RDRAM modules */
enum { RDRAM_MAX_MODULES_COUNT = 8 };

struct rdram
{
    uint32_t regs[RDRAM_MAX_MODULES_COUNT][RDRAM_REGS_COUNT];

    uint32_t* dram;
    size_t dram_size;

    struct r4300_core* r4300;
};

static osal_inline uint32_t rdram_reg(uint32_t address)
{
    return (address & 0x3ff) >> 2;
}

static osal_inline uint32_t rdram_dram_address(uint32_t address)
{
    return (address & 0xffffff) >> 2;
}

void init_rdram(struct rdram* rdram,
                uint32_t* dram,
                size_t dram_size,
                struct r4300_core* r4300);

void poweron_rdram(struct rdram* rdram);

void read_rdram_regs(void* opaque, uint32_t address, uint32_t* value);
void write_rdram_regs(void* opaque, uint32_t address, uint32_t value, uint32_t mask);

void read_rdram_dram(void* opaque, uint32_t address, uint32_t* value);
void write_rdram_dram(void* opaque, uint32_t address, uint32_t value, uint32_t mask);

uint32_t rdram_calculate_cycles(uint32_t length);

#endif
