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63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
//
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// bus/memory_map.h: System memory mapper.
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//
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// CEN64: Cycle-Accurate Nintendo 64 Emulator.
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// Copyright (C) 2015, Tyler J. Stachecki.
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//
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// This file is subject to the terms and conditions defined in
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// 'LICENSE', which is part of this source code package.
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//
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#ifndef __bus_memory_map_h__
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#define __bus_memory_map_h__
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#include "common.h"
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// Callback functions to handle reads/writes.
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typedef int (*memory_rd_function)(void *, uint32_t, uint32_t *);
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typedef int (*memory_wr_function)(void *, uint32_t, uint32_t, uint32_t);
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enum memory_map_color {
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MEMORY_MAP_BLACK,
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MEMORY_MAP_RED
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};
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struct memory_mapping {
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void *instance;
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memory_rd_function on_read;
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memory_wr_function on_write;
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uint32_t length;
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uint32_t start;
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uint32_t end;
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};
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struct memory_map_node {
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struct memory_map_node *left;
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struct memory_map_node *parent;
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struct memory_map_node *right;
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struct memory_mapping mapping;
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enum memory_map_color color;
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};
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struct memory_map {
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struct memory_map_node mappings[19];
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struct memory_map_node *nil;
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struct memory_map_node *root;
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unsigned next_map_index;
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};
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cen64_cold void create_memory_map(struct memory_map *map);
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cen64_cold int map_address_range(struct memory_map *memory_map,
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uint32_t start, uint32_t length, void *instance,
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memory_rd_function on_read, memory_wr_function on_write);
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cen64_hot const struct memory_mapping* resolve_mapped_address(
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const struct memory_map *memory_map, uint32_t address);
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#endif
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