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
 19enum DSMemoryRegion {
 20	DS7_REGION_BIOS = 0x0,
 21	DS9_REGION_ITCM = 0x0,
 22	DS9_REGION_ITCM_MIRROR = 0x1,
 23	DS_REGION_RAM = 0x2,
 24	DS_REGION_WORKING_RAM = 0x3,
 25	DS_REGION_IO = 0x4,
 26	DS9_REGION_PALETTE_RAM = 0x5,
 27	DS_REGION_VRAM = 0x6,
 28	DS9_REGION_OAM = 0x7,
 29	DS_REGION_SLOT2 = 0x8,
 30	DS_REGION_SLOT2_EX = 0x9,
 31	DS_REGION_SLOT2_SRAM = 0xA,
 32	DS9_REGION_BIOS = 0xFF,
 33};
 34
 35enum DSMemoryBase {
 36	DS7_BASE_BIOS = 0x00000000,
 37	DS9_BASE_ITCM = 0x00000000,
 38	DS_BASE_RAM = 0x02000000,
 39	DS9_BASE_DTCM = 0x027C0000,
 40	DS_BASE_WORKING_RAM = 0x03000000,
 41	DS7_BASE_WORKING_RAM = 0x03800000,
 42	DS_BASE_IO = 0x04000000,
 43	DS9_BASE_PALETTE_RAM = 0x05000000,
 44	DS_BASE_VRAM = 0x06000000,
 45	DS9_BASE_OAM = 0x07000000,
 46	DS_BASE_SLOT2 = 0x08000000,
 47	DS_BASE_SLOT2_EX = 0x09000000,
 48	DS9_BASE_BIOS = 0xFFFF0000,
 49};
 50
 51enum {
 52	DS9_SIZE_ITCM = 0x00008000,
 53	DS9_SIZE_DTCM = 0x00004000,
 54	DS7_SIZE_BIOS = 0x00004000,
 55	DS9_SIZE_BIOS = 0x00008000,
 56	DS_SIZE_RAM = 0x00400000,
 57	DS_SIZE_WORKING_RAM = 0x00008000,
 58	DS7_SIZE_WORKING_RAM = 0x00010000,
 59	DS9_SIZE_PALETTE_RAM = 0x00000800,
 60	DS9_SIZE_OAM = 0x00000800,
 61	DS_SIZE_SLOT2 = 0x02000000,
 62	DS_SIZE_SLOT2_SRAM = 0x00010000,
 63};
 64
 65enum {
 66	DS_OFFSET_MASK = 0x00FFFFFF,
 67	DS_BASE_OFFSET = 24
 68};
 69
 70mLOG_DECLARE_CATEGORY(DS_MEM);
 71
 72struct DSMemory {
 73	uint32_t* bios7;
 74	uint32_t* bios9;
 75	uint32_t* itcm;
 76	uint32_t* dtcm;
 77	uint32_t* ram;
 78	uint32_t* wram;
 79	uint32_t* wram7;
 80	uint32_t* rom;
 81	uint16_t io7[DS7_REG_MAX >> 1];
 82	uint16_t io9[DS9_REG_MAX >> 1];
 83
 84	size_t romSize;
 85	size_t wramSize7;
 86	size_t wramSize9;
 87};
 88
 89struct DSCoreMemory {
 90	uint16_t* io;
 91	int activeRegion;
 92
 93	char waitstatesSeq32[256];
 94	char waitstatesSeq16[256];
 95	char waitstatesNonseq32[256];
 96	char waitstatesNonseq16[256];
 97	char waitstatesPrefetchSeq32[16];
 98	char waitstatesPrefetchSeq16[16];
 99	char waitstatesPrefetchNonseq32[16];
100	char waitstatesPrefetchNonseq16[16];
101
102	struct GBADMA dma[4];
103	struct mTimingEvent dmaEvent;
104	int activeDMA;
105};
106
107struct DS;
108void DSMemoryInit(struct DS* ds);
109void DSMemoryDeinit(struct DS* ds);
110
111void DSMemoryReset(struct DS* ds);
112
113uint32_t DS7Load32(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
114uint32_t DS7Load16(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
115uint32_t DS7Load8(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
116
117void DS7Store32(struct ARMCore* cpu, uint32_t address, int32_t value, int* cycleCounter);
118void DS7Store16(struct ARMCore* cpu, uint32_t address, int16_t value, int* cycleCounter);
119void DS7Store8(struct ARMCore* cpu, uint32_t address, int8_t value, int* cycleCounter);
120
121uint32_t DS7LoadMultiple(struct ARMCore*, uint32_t baseAddress, int mask, enum LSMDirection direction,
122                         int* cycleCounter);
123uint32_t DS7StoreMultiple(struct ARMCore*, uint32_t baseAddress, int mask, enum LSMDirection direction,
124                          int* cycleCounter);
125
126uint32_t DS9Load32(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
127uint32_t DS9Load16(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
128uint32_t DS9Load8(struct ARMCore* cpu, uint32_t address, int* cycleCounter);
129
130void DS9Store32(struct ARMCore* cpu, uint32_t address, int32_t value, int* cycleCounter);
131void DS9Store16(struct ARMCore* cpu, uint32_t address, int16_t value, int* cycleCounter);
132void DS9Store8(struct ARMCore* cpu, uint32_t address, int8_t value, int* cycleCounter);
133
134uint32_t DS9LoadMultiple(struct ARMCore*, uint32_t baseAddress, int mask, enum LSMDirection direction,
135                         int* cycleCounter);
136uint32_t DS9StoreMultiple(struct ARMCore*, uint32_t baseAddress, int mask, enum LSMDirection direction,
137                          int* cycleCounter);
138
139#endif