1#include "gba.h"
  2
  3#include <sys/mman.h>
  4
  5void GBAInit(struct GBA* gba) {
  6	ARMInit(&gba->cpu);
  7	GBAMemoryInit(&gba->memory);
  8}
  9
 10void GBADeinit(struct GBA* gba) {
 11	GBAMemoryDeinit(&gba->memory);
 12}
 13
 14void GBAMemoryInit(struct GBAMemory* memory) {
 15	memory->d.load32 = GBALoad32;
 16	memory->d.load16 = GBALoad16;
 17	memory->d.loadU16 = GBALoadU16;
 18	memory->d.load8 = GBALoad8;
 19	memory->d.loadU8 = GBALoadU8;
 20
 21	memory->bios = 0;
 22	memory->wram = mmap(0, SIZE_WORKING_RAM, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
 23	memory->iwram = mmap(0, SIZE_WORKING_IRAM, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
 24	memory->rom = 0;
 25}
 26
 27void GBAMemoryDeinit(struct GBAMemory* memory) {
 28	munmap(memory->wram, SIZE_WORKING_RAM);
 29	munmap(memory->iwram, SIZE_WORKING_IRAM);
 30}
 31
 32int32_t GBALoad32(struct ARMMemory* memory, uint32_t address) {
 33	struct GBAMemory* gbaMemory = (struct GBAMemory*) memory;
 34
 35	switch (address & OFFSET_MASK) {
 36	case REGION_BIOS:
 37		break;
 38	case REGION_WORKING_RAM:
 39		break;
 40	case REGION_WORKING_IRAM:
 41		break;
 42	case REGION_IO:
 43		break;
 44	case REGION_PALETTE_RAM:
 45		break;
 46	case REGION_VRAM:
 47		break;
 48	case REGION_OAM:
 49		break;
 50	case REGION_CART0:
 51	case REGION_CART0_EX:
 52	case REGION_CART1:
 53	case REGION_CART1_EX:
 54	case REGION_CART2:
 55	case REGION_CART2_EX:
 56		break;
 57	case REGION_CART_SRAM:
 58		break;
 59	default:
 60		break;
 61	}
 62
 63	return 0;
 64}
 65
 66int16_t GBALoad16(struct ARMMemory* memory, uint32_t address) {
 67	struct GBAMemory* gbaMemory = (struct GBAMemory*) memory;
 68
 69	switch (address & OFFSET_MASK) {
 70	case REGION_BIOS:
 71		break;
 72	case REGION_WORKING_RAM:
 73		break;
 74	case REGION_WORKING_IRAM:
 75		break;
 76	case REGION_IO:
 77		break;
 78	case REGION_PALETTE_RAM:
 79		break;
 80	case REGION_VRAM:
 81		break;
 82	case REGION_OAM:
 83		break;
 84	case REGION_CART0:
 85	case REGION_CART0_EX:
 86	case REGION_CART1:
 87	case REGION_CART1_EX:
 88	case REGION_CART2:
 89	case REGION_CART2_EX:
 90		break;
 91	case REGION_CART_SRAM:
 92		break;
 93	default:
 94		break;
 95	}
 96
 97	return 0;
 98}
 99
100uint16_t GBALoadU16(struct ARMMemory* memory, uint32_t address) {
101	struct GBAMemory* gbaMemory = (struct GBAMemory*) memory;
102
103	switch (address & OFFSET_MASK) {
104	case REGION_BIOS:
105		break;
106	case REGION_WORKING_RAM:
107		break;
108	case REGION_WORKING_IRAM:
109		break;
110	case REGION_IO:
111		break;
112	case REGION_PALETTE_RAM:
113		break;
114	case REGION_VRAM:
115		break;
116	case REGION_OAM:
117		break;
118	case REGION_CART0:
119	case REGION_CART0_EX:
120	case REGION_CART1:
121	case REGION_CART1_EX:
122	case REGION_CART2:
123	case REGION_CART2_EX:
124		break;
125	case REGION_CART_SRAM:
126		break;
127	default:
128		break;
129	}
130
131	return 0;
132}
133
134int8_t GBALoad8(struct ARMMemory* memory, uint32_t address) {
135	struct GBAMemory* gbaMemory = (struct GBAMemory*) memory;
136
137	switch (address & OFFSET_MASK) {
138	case REGION_BIOS:
139		break;
140	case REGION_WORKING_RAM:
141		break;
142	case REGION_WORKING_IRAM:
143		break;
144	case REGION_IO:
145		break;
146	case REGION_PALETTE_RAM:
147		break;
148	case REGION_VRAM:
149		break;
150	case REGION_OAM:
151		break;
152	case REGION_CART0:
153	case REGION_CART0_EX:
154	case REGION_CART1:
155	case REGION_CART1_EX:
156	case REGION_CART2:
157	case REGION_CART2_EX:
158		break;
159	case REGION_CART_SRAM:
160		break;
161	default:
162		break;
163	}
164
165	return 0;
166}
167
168uint8_t GBALoadU8(struct ARMMemory* memory, uint32_t address) {
169	struct GBAMemory* gbaMemory = (struct GBAMemory*) memory;
170
171	switch (address & OFFSET_MASK) {
172	case REGION_BIOS:
173		break;
174	case REGION_WORKING_RAM:
175		break;
176	case REGION_WORKING_IRAM:
177		break;
178	case REGION_IO:
179		break;
180	case REGION_PALETTE_RAM:
181		break;
182	case REGION_VRAM:
183		break;
184	case REGION_OAM:
185		break;
186	case REGION_CART0:
187	case REGION_CART0_EX:
188	case REGION_CART1:
189	case REGION_CART1_EX:
190	case REGION_CART2:
191	case REGION_CART2_EX:
192		break;
193	case REGION_CART_SRAM:
194		break;
195	default:
196		break;
197	}
198
199	return 0;
200}