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DS IPC: Implement IPC read

This commit is contained in:
Vicki Pfau 2017-01-30 15:02:19 -08:00
parent f7ed6ec99f
commit 3679e1e8d6
4 changed files with 44 additions and 2 deletions
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2
include/mgba/internal/ds/io.h
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@ -282,12 +282,14 @@ void DS7IOWrite(struct DS* ds, uint32_t address, uint16_t value);
void DS7IOWrite8(struct DS* ds, uint32_t address, uint8_t value);
void DS7IOWrite32(struct DS* ds, uint32_t address, uint32_t value);
uint16_t DS7IORead(struct DS* ds, uint32_t address);
uint32_t DS7IORead32(struct DS* ds, uint32_t address);
void DS9IOInit(struct DS* ds);
void DS9IOWrite(struct DS* ds, uint32_t address, uint16_t value);
void DS9IOWrite8(struct DS* ds, uint32_t address, uint8_t value);
void DS9IOWrite32(struct DS* ds, uint32_t address, uint32_t value);
uint16_t DS9IORead(struct DS* ds, uint32_t address);
uint32_t DS9IORead32(struct DS* ds, uint32_t address);
CXX_GUARD_END

20
src/ds/io.c
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@ -207,6 +207,7 @@ uint16_t DS7IORead(struct DS* ds, uint32_t address) {
case DS_REG_TM2CNT_HI:
case DS_REG_TM3CNT_HI:
case DS_REG_IPCSYNC:
case DS_REG_IPCFIFOCNT:
case DS_REG_IME:
case DS_REG_IE_LO:
case DS_REG_IE_HI:
@ -223,6 +224,15 @@ uint16_t DS7IORead(struct DS* ds, uint32_t address) {
return 0;
}
uint32_t DS7IORead32(struct DS* ds, uint32_t address) {
switch (address) {
case DS_REG_IPCFIFORECV_LO:
return DSIPCReadFIFO(&ds->ds7);
default:
return DS7IORead(ds, address & 0x00FFFFFC) | (DS7IORead(ds, (address & 0x00FFFFFC) | 2) << 16);
}
}
void DS9IOInit(struct DS* ds) {
memset(ds->memory.io9, 0, sizeof(ds->memory.io9));
}
@ -328,6 +338,7 @@ uint16_t DS9IORead(struct DS* ds, uint32_t address) {
case DS_REG_TM2CNT_HI:
case DS_REG_TM3CNT_HI:
case DS_REG_IPCSYNC:
case DS_REG_IPCFIFOCNT:
case DS_REG_IME:
case DS_REG_IE_LO:
case DS_REG_IE_HI:
@ -343,3 +354,12 @@ uint16_t DS9IORead(struct DS* ds, uint32_t address) {
}
return 0;
}
uint32_t DS9IORead32(struct DS* ds, uint32_t address) {
switch (address) {
case DS_REG_IPCFIFORECV_LO:
return DSIPCReadFIFO(&ds->ds9);
default:
return DS9IORead(ds, address & 0x00FFFFFC) | (DS9IORead(ds, (address & 0x00FFFFFC) | 2) << 16);
}
}

20
src/ds/ipc.c
View File

@ -48,3 +48,23 @@ void DSIPCWriteFIFO(struct DSCommon* dscore, int32_t value) {
dscore->ipc->memory.io[DS_REG_IPCFIFOCNT >> 1] = DSIPCFIFOCNTFillRecvFull(dscore->ipc->memory.io[DS_REG_IPCFIFOCNT >> 1]);
}
}
int32_t DSIPCReadFIFO(struct DSCommon* dscore) {
if (!DSIPCFIFOCNTIsEnable(dscore->memory.io[DS_REG_IPCFIFOCNT >> 1])) {
return 0;
}
int32_t value = ((int32_t*) dscore->ipc->memory.io)[DS_REG_IPCFIFOSEND_LO >> 2]; // TODO: actual last value
CircleBufferRead32(&dscore->fifo, &value);
size_t fullness = CircleBufferSize(&dscore->fifo);
dscore->memory.io[DS_REG_IPCFIFOCNT >> 1] = DSIPCFIFOCNTClearRecvFull(dscore->memory.io[DS_REG_IPCFIFOCNT >> 1]);
dscore->ipc->memory.io[DS_REG_IPCFIFOCNT >> 1] = DSIPCFIFOCNTClearSendFull(dscore->ipc->memory.io[DS_REG_IPCFIFOCNT >> 1]);
if (fullness == 0) {
dscore->memory.io[DS_REG_IPCFIFOCNT >> 1] = DSIPCFIFOCNTFillRecvEmpty(dscore->memory.io[DS_REG_IPCFIFOCNT >> 1]);
dscore->ipc->memory.io[DS_REG_IPCFIFOCNT >> 1] = DSIPCFIFOCNTFillSendEmpty(dscore->ipc->memory.io[DS_REG_IPCFIFOCNT >> 1]);
if (DSIPCFIFOCNTIsSendIRQ(dscore->ipc->memory.io[DS_REG_IPCFIFOCNT >> 1])) {
// TODO: Adaptive time slicing?
DSRaiseIRQ(dscore->ipc->cpu, dscore->ipc->memory.io, DS_IRQ_IPC_NOT_EMPTY);
}
}
return value;
}

4
src/ds/memory.c
View File

@ -237,7 +237,7 @@ uint32_t DS7Load32(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
mLOG(DS_MEM, STUB, "Unimplemented DS7 Load32: %08X", address);
break;
case DS_REGION_IO:
value = DS7IORead(ds, address & 0x00FFFFFC) | (DS7IORead(ds, (address & 0x00FFFFFC) | 2) << 16);
value = DS7IORead32(ds, address & 0x00FFFFFC);
break;
default:
mLOG(DS_MEM, STUB, "Unimplemented DS7 Load32: %08X", address);
@ -681,7 +681,7 @@ uint32_t DS9Load32(struct ARMCore* cpu, uint32_t address, int* cycleCounter) {
mLOG(DS_MEM, STUB, "Unimplemented DS9 Load32: %08X", address);
break;
case DS_REGION_IO:
value = DS9IORead(ds, address & 0x00FFFFFC) | (DS9IORead(ds, (address & 0x00FFFFFC) | 2) << 16);
value = DS9IORead32(ds, address & 0x00FFFFFC);
break;
case DS9_REGION_BIOS:
// TODO: Fix undersized BIOS