/* Internal MMIO state and API. */
#ifndef FX_EMU_CORE_MMIO_INTERNAL_H
#define FX_EMU_CORE_MMIO_INTERNAL_H

#include "eps6800.h"
#include "mmio_layout.h"

#include <stdint.h>
#include <stdbool.h>

struct cpu_state;
struct kbd_state;
struct lcd_state;
struct timer_state;

typedef bool (*mmio_debug_access_callback)(
	void *user,
	uint32_t linear_address,
	uint8_t *value,
	bool write,
	bool before
);

struct mmio_state {
	enum eps_variant variant;
	uint8_t regs[MMIO_REG_COUNT];
	uint8_t ram_wbk[MMIO_WBK_COUNT]; /* Mapped into 0x25-0x3F if WBK=1 */
	uint8_t ram[MMIO_RAM_COUNT];
	struct cpu_state *cpu;
	struct kbd_state *kbd;
	struct lcd_state *lcd;
	struct timer_state *timer;
	mmio_debug_access_callback debug_access;
	void *debug_access_user;
	uint32_t debug_access_suppression;
};

void mmio_connect_peripherals_state(
	struct mmio_state *state,
	struct kbd_state *kbd,
	struct lcd_state *lcd,
	struct timer_state *timer
);
void mmio_connect_cpu_state(struct mmio_state *state, struct cpu_state *cpu);
void mmio_set_debug_access_callback_state(
	struct mmio_state *state,
	mmio_debug_access_callback callback,
	void *user
);
void mmio_suppress_debug_access_state(struct mmio_state *state, bool suppress);
void mmio_bad_read_byte_state(struct mmio_state *state, uint8_t addr);
void mmio_bad_write_byte_state(struct mmio_state *state, uint8_t addr);
uint8_t mmio_read_byte_state(struct mmio_state *state, uint8_t addr);
void mmio_write_byte_state(struct mmio_state *state, uint8_t addr, uint8_t byte);
void mmio_write_byte_internal_state(struct mmio_state *state, uint8_t addr, uint8_t byte);
uint8_t mmio_read_byte_internal_state(struct mmio_state *state, uint8_t addr);
void mmio_post_id_state(struct mmio_state *state, uint8_t addr);
void mmio_sync_extended_fsr_result_state(struct mmio_state *state, uint8_t addr, uint8_t result);
void mmio_carry_propagate_state(struct mmio_state *state, uint8_t addr);
void mmio_borrow_propagate_state(struct mmio_state *state, uint8_t addr);
void mmio_init_state(struct mmio_state *state, enum eps_variant variant);
void mmio_reset_state(struct mmio_state *state);
void mmio_trace_snapshot_state(
	const struct mmio_state *state,
	uint8_t *regs_out,
	uint8_t *ram_wbk_out,
	uint8_t *ram_out
);

#endif /* FX_EMU_CORE_MMIO_INTERNAL_H */