ShuriZma
/
mgba
mirror of https://github.com/mgba-emu/mgba.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

GBA: Add prefetch data to savestate

This commit is contained in:
Jeffrey Pfau 2015-01-14 22:34:10 -08:00
parent 10b0ad961a
commit 543ffac706
2 changed files with 32 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/gba/gba-serialize.c
View File

@ -40,6 +40,10 @@ void GBASerialize(struct GBA* gba, struct GBASerializedState* state) {
memcpy(state->cpu.bankedRegisters, gba->cpu->bankedRegisters, 6 * 7 * sizeof(int32_t));
memcpy(state->cpu.bankedSPSRs, gba->cpu->bankedSPSRs, 6 * sizeof(int32_t));
state->biosPrefetch = gba->memory.biosPrefetch;
state->cpuPrefetch[0] = gba->cpu->prefetch[0];
state->cpuPrefetch[1] = gba->cpu->prefetch[1];
GBAMemorySerialize(&gba->memory, state);
GBAIOSerialize(gba, state);
GBAVideoSerialize(&gba->video, state);
@ -80,15 +84,30 @@ void GBADeserialize(struct GBA* gba, struct GBASerializedState* state) {
memcpy(gba->cpu->bankedSPSRs, state->cpu.bankedSPSRs, 6 * sizeof(int32_t));
gba->cpu->privilegeMode = gba->cpu->cpsr.priv;
gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
if (state->biosPrefetch) {
gba->memory.biosPrefetch = state->biosPrefetch;
}
if (gba->cpu->cpsr.t) {
gba->cpu->executionMode = MODE_THUMB;
if (state->cpuPrefetch[0] && state->cpuPrefetch[1]) {
gba->cpu->prefetch[0] = state->cpuPrefetch[0] & 0xFFFF;
gba->cpu->prefetch[1] = state->cpuPrefetch[1] & 0xFFFF;
} else {
// Maintain backwards compat
LOAD_16(gba->cpu->prefetch[0], (gba->cpu->gprs[ARM_PC] - WORD_SIZE_THUMB) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
LOAD_16(gba->cpu->prefetch[1], (gba->cpu->gprs[ARM_PC]) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
}
} else {
gba->cpu->executionMode = MODE_ARM;
if (state->cpuPrefetch[0] && state->cpuPrefetch[1]) {
gba->cpu->prefetch[0] = state->cpuPrefetch[0];
gba->cpu->prefetch[1] = state->cpuPrefetch[1];
} else {
// Maintain backwards compat
LOAD_32(gba->cpu->prefetch[0], (gba->cpu->gprs[ARM_PC] - WORD_SIZE_ARM) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
LOAD_32(gba->cpu->prefetch[1], (gba->cpu->gprs[ARM_PC]) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
}
}
GBAMemoryDeserialize(&gba->memory, state);
GBAIODeserialize(gba, state);

11
src/gba/gba-serialize.h
View File

@ -150,7 +150,11 @@ extern const uint32_t GBA_SAVESTATE_MAGIC;
* | 0x002C1 - 0x002C3: Flags
* | bits 0 - 1: Tilt state machine
* | bits 2 - 31: Reserved
* 0x002C4 - 0x002FF: Reserved (leave zero)
* 0x002C4 - 0x002F3: Reserved (leave zero)
* 0x002F4 - 0x002FF: Prefetch
* | 0x002F4 - 0x002F7: GBA BIOS bus prefetch
* | 0x002F8 - 0x002FB: CPU prefecth (decode slot)
* | 0x002FC - 0x002FF: CPU prefetch (fetch slot)
* 0x00300 - 0x00303: Associated movie stream ID for record/replay (or 0 if no stream)
* 0x00304 - 0x003FF: Reserved (leave zero)
* 0x00400 - 0x007FF: I/O memory
@ -267,7 +271,10 @@ struct GBASerializedState {
unsigned : 22;
} gpio;
uint32_t reservedGpio[15];
uint32_t reservedGpio[12];
uint32_t biosPrefetch;
uint32_t cpuPrefetch[2];
uint32_t associatedStreamId;