1/* Copyright (c) 2013-2016 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#ifndef DS_MEMORY_H
  7#define DS_MEMORY_H
  8
  9#include <mgba-util/common.h>
 10
 11CXX_GUARD_START
 12
 13#include <mgba/core/log.h>
 14#include <mgba/core/timing.h>
 15#include <mgba/internal/arm/arm.h>
 16#include <mgba/internal/ds/dma.h>
 17#include <mgba/internal/ds/io.h>
 18#include <mgba/internal/ds/slot1.h>
 19
 20enum DSMemoryRegion {
 21	DS7_REGION_BIOS = 0x0,
 22	DS9_REGION_ITCM = 0x0,
 23	DS9_REGION_ITCM_MIRROR = 0x1,
 24	DS_REGION_RAM = 0x2,
 25	DS_REGION_WORKING_RAM = 0x3,
 26	DS_REGION_IO = 0x4,
 27	DS9_REGION_PALETTE_RAM = 0x5,
 28	DS_REGION_VRAM = 0x6,
 29	DS9_REGION_OAM = 0x7,
 30	DS_REGION_SLOT2 = 0x8,
 31	DS_REGION_SLOT2_EX = 0x9,
 32	DS_REGION_SLOT2_SRAM = 0xA,
 33	DS9_REGION_BIOS = 0xFF,
 34};
 35
 36enum DSMemoryBase {
 37	DS7_BASE_BIOS = 0x00000000,
 38	DS9_BASE_ITCM = 0x00000000,
 39	DS_BASE_RAM = 0x02000000,
 40	DS9_BASE_DTCM = 0x027C0000,
 41	DS_BASE_WORKING_RAM = 0x03000000,
 42	DS7_BASE_WORKING_RAM = 0x03800000,
 43	DS_BASE_IO = 0x04000000,
 44	DS9_BASE_PALETTE_RAM = 0x05000000,
 45	DS_BASE_VRAM = 0x06000000,
 46	DS9_BASE_OAM = 0x07000000,
 47	DS_BASE_SLOT2 = 0x08000000,
 48	DS_BASE_SLOT2_EX = 0x09000000,
 49	DS9_BASE_BIOS = 0xFFFF0000,
 50};
 51
 52enum {
 53	DS9_SIZE_ITCM = 0x00008000,
 54	DS9_SIZE_DTCM = 0x00004000,
 55	DS7_SIZE_BIOS = 0x00004000,
 56	DS9_SIZE_BIOS = 0x00008000,
 57	DS_SIZE_RAM = 0x00400000,
 58	DS_SIZE_VRAM = 0x000A4000,
 59	DS_SIZE_WORKING_RAM = 0x00008000,
 60	DS7_SIZE_WORKING_RAM = 0x00010000,
 61	DS9_SIZE_PALETTE_RAM = 0x00000800,
 62	DS9_SIZE_OAM = 0x00000800,
 63	DS_SIZE_SLOT2 = 0x02000000,
 64	DS_SIZE_SLOT2_SRAM = 0x00010000,
 65};
 66
 67enum {
 68	DS_OFFSET_MASK = 0x00FFFFFF,
 69	DS_BASE_OFFSET = 24,
 70	DS_VRAM_OFFSET = 14
 71};
 72
 73mLOG_DECLARE_CATEGORY(DS_MEM);
 74
 75struct DSMemory {
 76	uint32_t* bios7;
 77	uint32_t* bios9;
 78	uint32_t* itcm;
 79	uint32_t* dtcm;
 80	uint32_t* ram;
 81	uint32_t* wram;
 82	uint32_t* wramBase7;
 83	uint32_t* wramBase9;
 84	uint32_t* wram7;
 85	uint32_t* rom;
 86	uint16_t io7[DS7_REG_MAX >> 1];
 87	uint16_t io9[DS9_REG_MAX >> 1];
 88	struct DSSlot1 slot1;
 89
 90	uint16_t vramMirror[9][0x40];
 91	uint16_t vramMode[9][8];
 92	uint16_t* vramBank[9];
 93
 94	size_t romSize;
 95	size_t wramSize7;
 96	size_t wramSize9;
 97
 98	uint32_t dtcmBase;
 99	uint32_t dtcmSize;
100	uint32_t itcmSize;
101
102	bool slot1Owner;
103	bool slot2Owner;
104};
105
106struct DSCoreMemory {
107	uint16_t* io;
108	int activeRegion;
109
110	char waitstatesSeq32[256];
111	char waitstatesSeq16[256];
112	char waitstatesNonseq32[256];
113	char waitstatesNonseq16[256];
114	char waitstatesPrefetchSeq32[16];
115	char waitstatesPrefetchSeq16[16];
116	char waitstatesPrefetchNonseq32[16];
117	char waitstatesPrefetchNonseq16[16];
118
119	struct GBADMA dma[4];
120	struct mTimingEvent dmaEvent;
121	int activeDMA;
122	bool slot1Access;
123	bool slot2Access;
124};
125
126struct DS;
127void DSMemoryInit(struct DS* ds);
128void DSMemoryDeinit(struct DS* ds);
129
130void DSMemoryReset(struct DS* ds);
131
132uint32_t DS7Load32(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
133uint32_t DS7Load16(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
134uint32_t DS7Load8(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
135
136void DS7Store32(struct ARMCore* cpu, uint32_t address, int32_t value, int* cycleCounter);
137void DS7Store16(struct ARMCore* cpu, uint32_t address, int16_t value, int* cycleCounter);
138void DS7Store8(struct ARMCore* cpu, uint32_t address, int8_t value, int* cycleCounter);
139
140uint32_t DS7LoadMultiple(struct ARMCore*, uint32_t baseAddress, int mask, enum LSMDirection direction,
141                         int* cycleCounter);
142uint32_t DS7StoreMultiple(struct ARMCore*, uint32_t baseAddress, int mask, enum LSMDirection direction,
143                          int* cycleCounter);
144
145uint32_t DS9Load32(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
146uint32_t DS9Load16(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
147uint32_t DS9Load8(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
148
149void DS9Store32(struct ARMCore* cpu, uint32_t address, int32_t value, int* cycleCounter);
150void DS9Store16(struct ARMCore* cpu, uint32_t address, int16_t value, int* cycleCounter);
151void DS9Store8(struct ARMCore* cpu, uint32_t address, int8_t value, int* cycleCounter);
152
153uint32_t DS9LoadMultiple(struct ARMCore*, uint32_t baseAddress, int mask, enum LSMDirection direction,
154                         int* cycleCounter);
155uint32_t DS9StoreMultiple(struct ARMCore*, uint32_t baseAddress, int mask, enum LSMDirection direction,
156                          int* cycleCounter);
157
158void DSConfigureWRAM(struct DSMemory*, uint8_t config);
159void DSConfigureExternalMemory(struct DS*, uint16_t config);
160
161#endif