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//
// bus/memory_map.h: System memory mapper.
//
// 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 __bus_memory_map_h__
#define __bus_memory_map_h__
#include "common.h"
// Callback functions to handle reads/writes.
typedef int (*memory_rd_function)(void *, uint32_t, uint32_t *);
typedef int (*memory_wr_function)(void *, uint32_t, uint32_t, uint32_t);
enum memory_map_color {
MEMORY_MAP_BLACK,
MEMORY_MAP_RED
};
struct memory_mapping {
void *instance;
memory_rd_function on_read;
memory_wr_function on_write;
uint32_t length;
uint32_t start;
uint32_t end;
};
struct memory_map_node {
struct memory_map_node *left;
struct memory_map_node *parent;
struct memory_map_node *right;
struct memory_mapping mapping;
enum memory_map_color color;
};
struct memory_map {
struct memory_map_node mappings[19];
struct memory_map_node *nil;
struct memory_map_node *root;
unsigned next_map_index;
};
cen64_cold void create_memory_map(struct memory_map *map);
cen64_cold int map_address_range(struct memory_map *memory_map,
uint32_t start, uint32_t length, void *instance,
memory_rd_function on_read, memory_wr_function on_write);
cen64_hot const struct memory_mapping* resolve_mapped_address(
const struct memory_map *memory_map, uint32_t address);
#endif
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