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Slightly more accurate waitstate emulation

This commit is contained in:
Jeffrey Pfau 2014-07-13 22:21:37 -07:00
parent 94438e141e
commit 939c349533
7 changed files with 95 additions and 65 deletions
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6
src/arm/arm.h
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@ -91,10 +91,12 @@ struct ARMMemory {
uint32_t* activeRegion;
uint32_t activeMask;
uint32_t activePrefetchCycles32;
uint32_t activePrefetchCycles16;
uint32_t activeSeqCycles32;
uint32_t activeSeqCycles16;
uint32_t activeNonseqCycles32;
uint32_t activeNonseqCycles16;
uint32_t activeUncachedCycles32;
uint32_t activeUncachedCycles16;
void (*setActiveRegion)(struct ARMCore*, uint32_t address);
int (*waitMultiple)(struct ARMCore*, uint32_t startAddress, int count);
};

2
src/arm/isa-arm.c
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@ -590,7 +590,7 @@ DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_ARM(LDM,
DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_ARM(STM,
cpu->memory.store32(cpu, addr, cpu->gprs[i], 0);,
currentCycles += cpu->memory.activeNonseqCycles32 - cpu->memory.activePrefetchCycles32)
currentCycles += cpu->memory.activeNonseqCycles32 - cpu->memory.activeSeqCycles32)
DEFINE_INSTRUCTION_ARM(SWP,
int rm = opcode & 0xF;

2
src/arm/isa-arm.h
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@ -3,7 +3,7 @@
#include "common.h"
#define ARM_PREFETCH_CYCLES (1 + cpu->memory.activePrefetchCycles32)
#define ARM_PREFETCH_CYCLES (1 + cpu->memory.activeSeqCycles32)
struct ARMCore;

4
src/arm/isa-inlines.h
View File

@ -46,12 +46,12 @@
#define ARM_WRITE_PC \
cpu->gprs[ARM_PC] = (cpu->gprs[ARM_PC] & -WORD_SIZE_ARM) + WORD_SIZE_ARM; \
cpu->memory.setActiveRegion(cpu, cpu->gprs[ARM_PC] - WORD_SIZE_ARM); \
currentCycles += 2 + cpu->memory.activeNonseqCycles32 + cpu->memory.activePrefetchCycles32;
currentCycles += 2 + cpu->memory.activeUncachedCycles32 + cpu->memory.activeSeqCycles32;
#define THUMB_WRITE_PC \
cpu->gprs[ARM_PC] = (cpu->gprs[ARM_PC] & -WORD_SIZE_THUMB) + WORD_SIZE_THUMB; \
cpu->memory.setActiveRegion(cpu, cpu->gprs[ARM_PC] - WORD_SIZE_THUMB); \
currentCycles += 2 + cpu->memory.activeNonseqCycles16 + cpu->memory.activePrefetchCycles16;
currentCycles += 2 + cpu->memory.activeUncachedCycles16 + cpu->memory.activeSeqCycles16;
static inline int _ARMModeHasSPSR(enum PrivilegeMode mode) {
return mode != MODE_SYSTEM && mode != MODE_USER;

4
src/arm/isa-thumb.c
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@ -34,10 +34,10 @@
D = M - N; \
THUMB_SUBTRACTION_S(m, n, D)
#define THUMB_PREFETCH_CYCLES (1 + cpu->memory.activePrefetchCycles16)
#define THUMB_PREFETCH_CYCLES (1 + cpu->memory.activeSeqCycles16)
#define THUMB_STORE_POST_BODY \
currentCycles += cpu->memory.activeNonseqCycles16 - cpu->memory.activePrefetchCycles16;
currentCycles += cpu->memory.activeNonseqCycles16 - cpu->memory.activeSeqCycles16;
#define DEFINE_INSTRUCTION_THUMB(NAME, BODY) \
static void _ThumbInstruction ## NAME (struct ARMCore* cpu, uint16_t opcode) { \

132
src/gba/gba-memory.c
View File

@ -53,28 +53,32 @@ void GBAMemoryInit(struct GBA* gba) {
}
for (i = 0; i < 16; ++i) {
gba->memory.waitstates16[i] = GBA_BASE_WAITSTATES[i];
gba->memory.waitstatesNonseq16[i] = GBA_BASE_WAITSTATES[i];
gba->memory.waitstatesSeq16[i] = GBA_BASE_WAITSTATES_SEQ[i];
gba->memory.waitstatesPrefetch16[i] = GBA_BASE_WAITSTATES_SEQ[i];
gba->memory.waitstates32[i] = GBA_BASE_WAITSTATES_32[i];
gba->memory.waitstatesPrefetchNonseq16[i] = GBA_BASE_WAITSTATES[i];
gba->memory.waitstatesPrefetchSeq16[i] = GBA_BASE_WAITSTATES_SEQ[i];
gba->memory.waitstatesNonseq32[i] = GBA_BASE_WAITSTATES_32[i];
gba->memory.waitstatesSeq32[i] = GBA_BASE_WAITSTATES_SEQ_32[i];
gba->memory.waitstatesPrefetch32[i] = GBA_BASE_WAITSTATES_SEQ_32[i];
gba->memory.waitstatesPrefetchNonseq32[i] = GBA_BASE_WAITSTATES_32[i];
gba->memory.waitstatesPrefetchSeq32[i] = GBA_BASE_WAITSTATES_SEQ_32[i];
}
for (; i < 256; ++i) {
gba->memory.waitstates16[i] = 0;
gba->memory.waitstatesNonseq16[i] = 0;
gba->memory.waitstatesSeq16[i] = 0;
gba->memory.waitstatesPrefetch16[i] = 0;
gba->memory.waitstates32[i] = 0;
gba->memory.waitstatesNonseq32[i] = 0;
gba->memory.waitstatesSeq32[i] = 0;
gba->memory.waitstatesPrefetch32[i] = 0;
}
gba->memory.activeRegion = -1;
cpu->memory.activeRegion = 0;
cpu->memory.activeMask = 0;
cpu->memory.setActiveRegion = GBASetActiveRegion;
cpu->memory.activePrefetchCycles32 = 0;
cpu->memory.activePrefetchCycles16 = 0;
cpu->memory.activeSeqCycles32 = 0;
cpu->memory.activeSeqCycles16 = 0;
cpu->memory.activeNonseqCycles32 = 0;
cpu->memory.activeNonseqCycles16 = 0;
cpu->memory.activeUncachedCycles32 = 0;
cpu->memory.activeUncachedCycles16 = 0;
gba->memory.biosPrefetch = 0;
cpu->memory.waitMultiple = GBAWaitMultiple;
}
@ -100,10 +104,6 @@ static void GBASetActiveRegion(struct ARMCore* cpu, uint32_t address) {
memory->biosPrefetch = cpu->memory.load32(cpu, cpu->currentPC + WORD_SIZE_ARM * 2, 0);
}
memory->activeRegion = newRegion;
cpu->memory.activePrefetchCycles32 = memory->waitstatesPrefetch32[memory->activeRegion];
cpu->memory.activePrefetchCycles16 = memory->waitstatesPrefetch16[memory->activeRegion];
cpu->memory.activeNonseqCycles32 = memory->waitstates32[memory->activeRegion];
cpu->memory.activeNonseqCycles16 = memory->waitstates16[memory->activeRegion];
switch (address & ~OFFSET_MASK) {
case BASE_BIOS:
cpu->memory.activeRegion = memory->bios;
@ -132,6 +132,12 @@ static void GBASetActiveRegion(struct ARMCore* cpu, uint32_t address) {
GBALog(gba, GBA_LOG_FATAL, "Jumped to invalid address");
break;
}
cpu->memory.activeSeqCycles32 = memory->waitstatesPrefetchSeq32[memory->activeRegion];
cpu->memory.activeSeqCycles16 = memory->waitstatesPrefetchSeq16[memory->activeRegion];
cpu->memory.activeNonseqCycles32 = memory->waitstatesPrefetchNonseq32[memory->activeRegion];
cpu->memory.activeNonseqCycles16 = memory->waitstatesPrefetchNonseq16[memory->activeRegion];
cpu->memory.activeUncachedCycles32 = memory->waitstatesNonseq32[memory->activeRegion];
cpu->memory.activeUncachedCycles16 = memory->waitstatesNonseq16[memory->activeRegion];
}
int32_t GBALoad32(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
@ -154,7 +160,7 @@ int32_t GBALoad32(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
break;
case BASE_WORKING_RAM:
LOAD_32(value, address & (SIZE_WORKING_RAM - 1), memory->wram);
wait = memory->waitstates32[REGION_WORKING_RAM];
wait = memory->waitstatesNonseq32[REGION_WORKING_RAM];
break;
case BASE_WORKING_IRAM:
LOAD_32(value, address & (SIZE_WORKING_IRAM - 1), memory->iwram);
@ -177,7 +183,7 @@ int32_t GBALoad32(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
case BASE_CART1_EX:
case BASE_CART2:
case BASE_CART2_EX:
wait = memory->waitstates32[address >> BASE_OFFSET];
wait = memory->waitstatesNonseq32[address >> BASE_OFFSET];
if ((address & (SIZE_CART0 - 1)) < memory->romSize) {
LOAD_32(value, address & (SIZE_CART0 - 1), memory->rom);
}
@ -230,7 +236,7 @@ int16_t GBALoad16(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
break;
case BASE_WORKING_RAM:
LOAD_16(value, address & (SIZE_WORKING_RAM - 1), memory->wram);
wait = memory->waitstates16[REGION_WORKING_RAM];
wait = memory->waitstatesNonseq16[REGION_WORKING_RAM];
break;
case BASE_WORKING_IRAM:
LOAD_16(value, address & (SIZE_WORKING_IRAM - 1), memory->iwram);
@ -252,13 +258,13 @@ int16_t GBALoad16(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
case BASE_CART1:
case BASE_CART1_EX:
case BASE_CART2:
wait = memory->waitstates16[address >> BASE_OFFSET];
wait = memory->waitstatesNonseq16[address >> BASE_OFFSET];
if ((address & (SIZE_CART0 - 1)) < memory->romSize) {
LOAD_16(value, address & (SIZE_CART0 - 1), memory->rom);
}
break;
case BASE_CART2_EX:
wait = memory->waitstates16[address >> BASE_OFFSET];
wait = memory->waitstatesNonseq16[address >> BASE_OFFSET];
if (memory->savedata.type == SAVEDATA_EEPROM) {
value = GBASavedataReadEEPROM(&memory->savedata);
} else if ((address & (SIZE_CART0 - 1)) < memory->romSize) {
@ -307,7 +313,7 @@ int8_t GBALoad8(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
break;
case BASE_WORKING_RAM:
value = ((int8_t*) memory->wram)[address & (SIZE_WORKING_RAM - 1)];
wait = memory->waitstates16[REGION_WORKING_RAM];
wait = memory->waitstatesNonseq16[REGION_WORKING_RAM];
break;
case BASE_WORKING_IRAM:
value = ((int8_t*) memory->iwram)[address & (SIZE_WORKING_IRAM - 1)];
@ -330,14 +336,14 @@ int8_t GBALoad8(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
case BASE_CART1_EX:
case BASE_CART2:
case BASE_CART2_EX:
wait = memory->waitstates16[address >> BASE_OFFSET];
wait = memory->waitstatesNonseq16[address >> BASE_OFFSET];
if ((address & (SIZE_CART0 - 1)) < memory->romSize) {
value = ((int8_t*) memory->rom)[address & (SIZE_CART0 - 1)];
}
break;
case BASE_CART_SRAM:
case BASE_CART_SRAM_MIRROR:
wait = memory->waitstates16[address >> BASE_OFFSET];
wait = memory->waitstatesNonseq16[address >> BASE_OFFSET];
if (memory->savedata.type == SAVEDATA_NONE) {
GBASavedataInitSRAM(&memory->savedata);
}
@ -367,7 +373,7 @@ void GBAStore32(struct ARMCore* cpu, uint32_t address, int32_t value, int* cycle
switch (address & ~OFFSET_MASK) {
case BASE_WORKING_RAM:
STORE_32(value, address & (SIZE_WORKING_RAM - 1), memory->wram);
wait = memory->waitstates32[REGION_WORKING_RAM];
wait = memory->waitstatesNonseq32[REGION_WORKING_RAM];
break;
case BASE_WORKING_IRAM:
STORE_32(value, address & (SIZE_WORKING_IRAM - 1), memory->iwram);
@ -417,7 +423,7 @@ void GBAStore16(struct ARMCore* cpu, uint32_t address, int16_t value, int* cycle
switch (address & ~OFFSET_MASK) {
case BASE_WORKING_RAM:
STORE_16(value, address & (SIZE_WORKING_RAM - 1), memory->wram);
wait = memory->waitstates16[REGION_WORKING_RAM];
wait = memory->waitstatesNonseq16[REGION_WORKING_RAM];
break;
case BASE_WORKING_IRAM:
STORE_16(value, address & (SIZE_WORKING_IRAM - 1), memory->iwram);
@ -476,7 +482,7 @@ void GBAStore8(struct ARMCore* cpu, uint32_t address, int8_t value, int* cycleCo
switch (address & ~OFFSET_MASK) {
case BASE_WORKING_RAM:
((int8_t*) memory->wram)[address & (SIZE_WORKING_RAM - 1)] = value;
wait = memory->waitstates16[REGION_WORKING_RAM];
wait = memory->waitstatesNonseq16[REGION_WORKING_RAM];
break;
case BASE_WORKING_IRAM:
((int8_t*) memory->iwram)[address & (SIZE_WORKING_IRAM - 1)] = value;
@ -516,7 +522,7 @@ void GBAStore8(struct ARMCore* cpu, uint32_t address, int8_t value, int* cycleCo
} else if (memory->savedata.type == SAVEDATA_SRAM) {
memory->savedata.data[address & (SIZE_CART_SRAM - 1)] = value;
}
wait = memory->waitstates16[REGION_CART_SRAM];
wait = memory->waitstatesNonseq16[REGION_CART_SRAM];
break;
default:
GBALog(gba, GBA_LOG_GAME_ERROR, "Bad memory Store8: 0x%08X", address);
@ -531,7 +537,7 @@ void GBAStore8(struct ARMCore* cpu, uint32_t address, int8_t value, int* cycleCo
static int GBAWaitMultiple(struct ARMCore* cpu, uint32_t startAddress, int count) {
struct GBA* gba = (struct GBA*) cpu->master;
struct GBAMemory* memory = &gba->memory;
int wait = 1 + memory->waitstates32[startAddress >> BASE_OFFSET];
int wait = 1 + memory->waitstatesNonseq32[startAddress >> BASE_OFFSET];
wait += (1 + memory->waitstatesSeq32[startAddress >> BASE_OFFSET]) * (count - 1);
return wait;
}
@ -548,49 +554,69 @@ void GBAAdjustWaitstates(struct GBA* gba, uint16_t parameters) {
int ws2seq = (parameters & 0x0400) >> 10;
int prefetch = parameters & 0x4000;
memory->waitstates16[REGION_CART_SRAM] = memory->waitstates16[REGION_CART_SRAM_MIRROR] = GBA_ROM_WAITSTATES[sram];
memory->waitstatesNonseq16[REGION_CART_SRAM] = memory->waitstatesNonseq16[REGION_CART_SRAM_MIRROR] = GBA_ROM_WAITSTATES[sram];
memory->waitstatesSeq16[REGION_CART_SRAM] = memory->waitstatesSeq16[REGION_CART_SRAM_MIRROR] = GBA_ROM_WAITSTATES[sram];
memory->waitstates32[REGION_CART_SRAM] = memory->waitstates32[REGION_CART_SRAM_MIRROR] = 2 * GBA_ROM_WAITSTATES[sram] + 1;
memory->waitstatesNonseq32[REGION_CART_SRAM] = memory->waitstatesNonseq32[REGION_CART_SRAM_MIRROR] = 2 * GBA_ROM_WAITSTATES[sram] + 1;
memory->waitstatesSeq32[REGION_CART_SRAM] = memory->waitstatesSeq32[REGION_CART_SRAM_MIRROR] = 2 * GBA_ROM_WAITSTATES[sram] + 1;
memory->waitstates16[REGION_CART0] = memory->waitstates16[REGION_CART0_EX] = GBA_ROM_WAITSTATES[ws0];
memory->waitstates16[REGION_CART1] = memory->waitstates16[REGION_CART1_EX] = GBA_ROM_WAITSTATES[ws1];
memory->waitstates16[REGION_CART2] = memory->waitstates16[REGION_CART2_EX] = GBA_ROM_WAITSTATES[ws2];
memory->waitstatesNonseq16[REGION_CART0] = memory->waitstatesNonseq16[REGION_CART0_EX] = GBA_ROM_WAITSTATES[ws0];
memory->waitstatesNonseq16[REGION_CART1] = memory->waitstatesNonseq16[REGION_CART1_EX] = GBA_ROM_WAITSTATES[ws1];
memory->waitstatesNonseq16[REGION_CART2] = memory->waitstatesNonseq16[REGION_CART2_EX] = GBA_ROM_WAITSTATES[ws2];
memory->waitstatesSeq16[REGION_CART0] = memory->waitstatesSeq16[REGION_CART0_EX] = GBA_ROM_WAITSTATES_SEQ[ws0seq];
memory->waitstatesSeq16[REGION_CART1] = memory->waitstatesSeq16[REGION_CART1_EX] = GBA_ROM_WAITSTATES_SEQ[ws1seq + 2];
memory->waitstatesSeq16[REGION_CART2] = memory->waitstatesSeq16[REGION_CART2_EX] = GBA_ROM_WAITSTATES_SEQ[ws2seq + 4];
memory->waitstates32[REGION_CART0] = memory->waitstates32[REGION_CART0_EX] = memory->waitstates16[REGION_CART0] + 1 + memory->waitstatesSeq16[REGION_CART0];
memory->waitstates32[REGION_CART1] = memory->waitstates32[REGION_CART1_EX] = memory->waitstates16[REGION_CART1] + 1 + memory->waitstatesSeq16[REGION_CART1];
memory->waitstates32[REGION_CART2] = memory->waitstates32[REGION_CART2_EX] = memory->waitstates16[REGION_CART2] + 1 + memory->waitstatesSeq16[REGION_CART2];
memory->waitstatesNonseq32[REGION_CART0] = memory->waitstatesNonseq32[REGION_CART0_EX] = memory->waitstatesSeq16[REGION_CART0] + 1 + memory->waitstatesSeq16[REGION_CART0];
memory->waitstatesNonseq32[REGION_CART1] = memory->waitstatesNonseq32[REGION_CART1_EX] = memory->waitstatesSeq16[REGION_CART1] + 1 + memory->waitstatesSeq16[REGION_CART1];
memory->waitstatesNonseq32[REGION_CART2] = memory->waitstatesNonseq32[REGION_CART2_EX] = memory->waitstatesSeq16[REGION_CART2] + 1 + memory->waitstatesSeq16[REGION_CART2];
memory->waitstatesSeq32[REGION_CART0] = memory->waitstatesSeq32[REGION_CART0_EX] = 2 * memory->waitstatesSeq16[REGION_CART0] + 1;
memory->waitstatesSeq32[REGION_CART1] = memory->waitstatesSeq32[REGION_CART1_EX] = 2 * memory->waitstatesSeq16[REGION_CART1] + 1;
memory->waitstatesSeq32[REGION_CART2] = memory->waitstatesSeq32[REGION_CART2_EX] = 2 * memory->waitstatesSeq16[REGION_CART2] + 1;
if (!prefetch) {
memory->waitstatesPrefetch16[REGION_CART0] = memory->waitstatesPrefetch16[REGION_CART0_EX] = memory->waitstatesSeq16[REGION_CART0];
memory->waitstatesPrefetch16[REGION_CART1] = memory->waitstatesPrefetch16[REGION_CART1_EX] = memory->waitstatesSeq16[REGION_CART1];
memory->waitstatesPrefetch16[REGION_CART2] = memory->waitstatesPrefetch16[REGION_CART2_EX] = memory->waitstatesSeq16[REGION_CART2];
memory->waitstatesPrefetchSeq16[REGION_CART0] = memory->waitstatesPrefetchSeq16[REGION_CART0_EX] = memory->waitstatesSeq16[REGION_CART0];
memory->waitstatesPrefetchSeq16[REGION_CART1] = memory->waitstatesPrefetchSeq16[REGION_CART1_EX] = memory->waitstatesSeq16[REGION_CART1];
memory->waitstatesPrefetchSeq16[REGION_CART2] = memory->waitstatesPrefetchSeq16[REGION_CART2_EX] = memory->waitstatesSeq16[REGION_CART2];
memory->waitstatesPrefetch32[REGION_CART0] = memory->waitstatesPrefetch32[REGION_CART0_EX] = memory->waitstatesSeq32[REGION_CART0];
memory->waitstatesPrefetch32[REGION_CART1] = memory->waitstatesPrefetch32[REGION_CART1_EX] = memory->waitstatesSeq32[REGION_CART1];
memory->waitstatesPrefetch32[REGION_CART2] = memory->waitstatesPrefetch32[REGION_CART2_EX] = memory->waitstatesSeq32[REGION_CART2];
memory->waitstatesPrefetchSeq32[REGION_CART0] = memory->waitstatesPrefetchSeq32[REGION_CART0_EX] = memory->waitstatesSeq32[REGION_CART0];
memory->waitstatesPrefetchSeq32[REGION_CART1] = memory->waitstatesPrefetchSeq32[REGION_CART1_EX] = memory->waitstatesSeq32[REGION_CART1];
memory->waitstatesPrefetchSeq32[REGION_CART2] = memory->waitstatesPrefetchSeq32[REGION_CART2_EX] = memory->waitstatesSeq32[REGION_CART2];
memory->waitstatesPrefetchNonseq16[REGION_CART0] = memory->waitstatesPrefetchNonseq16[REGION_CART0_EX] = memory->waitstatesNonseq16[REGION_CART0];
memory->waitstatesPrefetchNonseq16[REGION_CART1] = memory->waitstatesPrefetchNonseq16[REGION_CART1_EX] = memory->waitstatesNonseq16[REGION_CART1];
memory->waitstatesPrefetchNonseq16[REGION_CART2] = memory->waitstatesPrefetchNonseq16[REGION_CART2_EX] = memory->waitstatesNonseq16[REGION_CART2];
memory->waitstatesPrefetchNonseq32[REGION_CART0] = memory->waitstatesPrefetchNonseq32[REGION_CART0_EX] = memory->waitstatesNonseq32[REGION_CART0];
memory->waitstatesPrefetchNonseq32[REGION_CART1] = memory->waitstatesPrefetchNonseq32[REGION_CART1_EX] = memory->waitstatesNonseq32[REGION_CART1];
memory->waitstatesPrefetchNonseq32[REGION_CART2] = memory->waitstatesPrefetchNonseq32[REGION_CART2_EX] = memory->waitstatesNonseq32[REGION_CART2];
} else {
memory->waitstatesPrefetch16[REGION_CART0] = memory->waitstatesPrefetch16[REGION_CART0_EX] = 0;
memory->waitstatesPrefetch16[REGION_CART1] = memory->waitstatesPrefetch16[REGION_CART1_EX] = 0;
memory->waitstatesPrefetch16[REGION_CART2] = memory->waitstatesPrefetch16[REGION_CART2_EX] = 0;
memory->waitstatesPrefetchSeq16[REGION_CART0] = memory->waitstatesPrefetchSeq16[REGION_CART0_EX] = 0;
memory->waitstatesPrefetchSeq16[REGION_CART1] = memory->waitstatesPrefetchSeq16[REGION_CART1_EX] = 0;
memory->waitstatesPrefetchSeq16[REGION_CART2] = memory->waitstatesPrefetchSeq16[REGION_CART2_EX] = 0;
memory->waitstatesPrefetch32[REGION_CART0] = memory->waitstatesPrefetch32[REGION_CART0_EX] = 0;
memory->waitstatesPrefetch32[REGION_CART1] = memory->waitstatesPrefetch32[REGION_CART1_EX] = 0;
memory->waitstatesPrefetch32[REGION_CART2] = memory->waitstatesPrefetch32[REGION_CART2_EX] = 0;
memory->waitstatesPrefetchSeq32[REGION_CART0] = memory->waitstatesPrefetchSeq32[REGION_CART0_EX] = 0;
memory->waitstatesPrefetchSeq32[REGION_CART1] = memory->waitstatesPrefetchSeq32[REGION_CART1_EX] = 0;
memory->waitstatesPrefetchSeq32[REGION_CART2] = memory->waitstatesPrefetchSeq32[REGION_CART2_EX] = 0;
memory->waitstatesPrefetchNonseq16[REGION_CART0] = memory->waitstatesPrefetchNonseq16[REGION_CART0_EX] = 0;
memory->waitstatesPrefetchNonseq16[REGION_CART1] = memory->waitstatesPrefetchNonseq16[REGION_CART1_EX] = 0;
memory->waitstatesPrefetchNonseq16[REGION_CART2] = memory->waitstatesPrefetchNonseq16[REGION_CART2_EX] = 0;
memory->waitstatesPrefetchNonseq32[REGION_CART0] = memory->waitstatesPrefetchNonseq32[REGION_CART0_EX] = 0;
memory->waitstatesPrefetchNonseq32[REGION_CART1] = memory->waitstatesPrefetchNonseq32[REGION_CART1_EX] = 0;
memory->waitstatesPrefetchNonseq32[REGION_CART2] = memory->waitstatesPrefetchNonseq32[REGION_CART2_EX] = 0;
}
cpu->memory.activePrefetchCycles32 = memory->waitstatesPrefetch32[memory->activeRegion];
cpu->memory.activePrefetchCycles16 = memory->waitstatesPrefetch16[memory->activeRegion];
cpu->memory.activeNonseqCycles32 = memory->waitstates32[memory->activeRegion];
cpu->memory.activeNonseqCycles16 = memory->waitstates16[memory->activeRegion];
cpu->memory.activeSeqCycles32 = memory->waitstatesPrefetchSeq32[memory->activeRegion];
cpu->memory.activeSeqCycles16 = memory->waitstatesPrefetchSeq16[memory->activeRegion];
cpu->memory.activeNonseqCycles32 = memory->waitstatesPrefetchNonseq32[memory->activeRegion];
cpu->memory.activeNonseqCycles16 = memory->waitstatesPrefetchNonseq16[memory->activeRegion];
cpu->memory.activeUncachedCycles32 = memory->waitstatesNonseq32[memory->activeRegion];
cpu->memory.activeUncachedCycles16 = memory->waitstatesNonseq16[memory->activeRegion];
}
void GBAMemoryWriteDMASAD(struct GBA* gba, int dma, uint32_t address) {
@ -740,11 +766,11 @@ void GBAMemoryServiceDMA(struct GBA* gba, int number, struct GBADMA* info) {
// TODO: support 4 cycles for ROM access
cycles += 2;
if (width == 4) {
cycles += memory->waitstates32[sourceRegion] + memory->waitstates32[destRegion];
cycles += memory->waitstatesNonseq32[sourceRegion] + memory->waitstatesNonseq32[destRegion];
source &= 0xFFFFFFFC;
dest &= 0xFFFFFFFC;
} else {
cycles += memory->waitstates16[sourceRegion] + memory->waitstates16[destRegion];
cycles += memory->waitstatesNonseq16[sourceRegion] + memory->waitstatesNonseq16[destRegion];
}
} else {
if (width == 4) {

10
src/gba/gba-memory.h
View File

@ -118,12 +118,14 @@ struct GBAMemory {
uint16_t romID;
int fullBios;
char waitstates32[256];
char waitstates16[256];
char waitstatesSeq32[256];
char waitstatesSeq16[256];
char waitstatesPrefetch32[256];
char waitstatesPrefetch16[256];
char waitstatesNonseq32[256];
char waitstatesNonseq16[256];
char waitstatesPrefetchSeq32[16];
char waitstatesPrefetchSeq16[16];
char waitstatesPrefetchNonseq32[16];
char waitstatesPrefetchNonseq16[16];
int activeRegion;
uint32_t biosPrefetch;