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//
// pi/controller.h: Parallel interface controller.
//
// CEN64: Cycle-Accurate Nintendo 64 Emulator.
// Copyright (C) 2015, Tyler J. Stachecki.
//
// This file is subject to the terms and conditions defined in
// 'LICENSE', which is part of this source code package.
//
#ifndef __pi_controller_h__
#define __pi_controller_h__
#include "common.h"
#include "os/common/save_file.h"
struct bus_controller *bus;
enum pi_register {
#define X(reg) reg,
#include "pi/registers.md"
#undef X
NUM_PI_REGISTERS
};
#ifdef DEBUG_MMIO_REGISTER_ACCESS
extern const char *pi_register_mnemonics[NUM_PI_REGISTERS];
#endif
#define FLASHRAM_SIZE 0x20000
enum flashram_mode {
FLASHRAM_IDLE = 0,
FLASHRAM_ERASE,
FLASHRAM_WRITE,
FLASHRAM_READ,
FLASHRAM_STATUS,
};
struct flashram {
uint8_t *data;
uint64_t status;
enum flashram_mode mode;
size_t offset;
size_t rdram_pointer;
};
struct pi_controller {
struct bus_controller *bus;
const uint8_t *rom;
size_t rom_size;
struct save_file *sram;
struct save_file *flashram_file;
struct flashram flashram;
uint64_t counter;
uint32_t bytes_to_copy;
bool is_dma_read;
uint32_t regs[NUM_PI_REGISTERS];
};
cen64_cold int pi_init(struct pi_controller *pi, struct bus_controller *bus,
const uint8_t *rom, size_t rom_size, const struct save_file *sram,
const struct save_file *flashram);
// Only invoke pi_cycle_ when the counter has expired (timeout).
void pi_cycle_(struct pi_controller *pi);
cen64_flatten cen64_hot static inline void pi_cycle(struct pi_controller *pi) {
if (unlikely(pi->counter-- == 0))
pi_cycle_(pi);
}
int read_cart_rom(void *opaque, uint32_t address, uint32_t *word);
int read_pi_regs(void *opaque, uint32_t address, uint32_t *word);
int write_cart_rom(void *opaque, uint32_t address, uint32_t word, uint32_t dqm);
int write_pi_regs(void *opaque, uint32_t address, uint32_t word, uint32_t dqm);
int read_flashram(void *opaque, uint32_t address, uint32_t *word);
int write_flashram(void *opaque, uint32_t address, uint32_t word, uint32_t dqm);
int read_sram(void *opaque, uint32_t address, uint32_t *word);
int write_sram(void *opaque, uint32_t address, uint32_t word, uint32_t dqm);
#endif
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