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pcsx2/pcsx2/HwWrite.cpp

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// SPDX-FileCopyrightText: 2002-2024 PCSX2 Dev Team
// SPDX-License-Identifier: GPL-3.0+
#include "Common.h"
#include "Hardware.h"
#include "Gif_Unit.h"
#include "IopMem.h"
#include "ps2/HwInternal.h"
#include "ps2/eeHwTraceLog.inl"
#include "ps2/pgif.h"
#include "SPU2/spu2.h"
#include "R3000A.h"
#include "CDVD/Ps1CD.h"
#include "CDVD/CDVD.h"
#include "IopDma.h" // for iopIntcIrq
using namespace R5900;
// Shift the middle 8 bits (bits 4-12) into the lower 8 bits.
// This helps the compiler optimize the switch statement into a lookup table. :)
#define HELPSWITCH(m) (((m)>>4) & 0xff)
#define mcase(src) case HELPSWITCH(src)
template< uint page > void _hwWrite8(u32 mem, u8 value);
template< uint page > void _hwWrite16(u32 mem, u8 value);
template< uint page > void TAKES_R128 _hwWrite128(u32 mem, r128 value);
template<uint page>
void _hwWrite32( u32 mem, u32 value )
{
pxAssume( (mem & 0x03) == 0 );
// Notes:
// All unknown registers on the EE are "reserved" as discarded writes and indeterminate
// reads. Bus error is only generated for registers outside the first 16k of mapped
// register space (which is handled by the VTLB mapping, so no need for checks here).
#if PSX_EXTRALOGS
if ((mem & 0x1000ff00) == 0x1000f300) DevCon.Warning("32bit Write to SIF Register %x value %x", mem, value);
//if ((mem & 0x1000ff00) == 0x1000f200) DevCon.Warning("Write to SIF Register %x value %x", mem, value);
#endif
switch (page)
{
case 0x00: if (!rcntWrite32<0x00>(mem, value)) return; break;
case 0x01: if (!rcntWrite32<0x01>(mem, value)) return; break;
case 0x02:
if (!ipuWrite32(mem, value)) return;
break;
case 0x04:
case 0x05:
case 0x06:
case 0x07:
{
// [Ps2Confirm] Direct FIFO read/write behavior. We need to create a test that writes
// data to one of the FIFOs and determine the result. I'm not quite sure offhand a good
// way to do that --air
// Current assumption is that 32-bit and 64-bit writes likely do 128-bit zero-filled
// writes (upper 96 bits are 0, lower 32 bits are effective).
u128 zerofill = u128::From32(0);
zerofill._u32[(mem >> 2) & 0x03] = value;
_hwWrite128<page>(mem & ~0x0f, r128_from_u128(zerofill));
}
return;
case 0x03:
if (mem >= EEMemoryMap::VIF0_Start)
{
if(mem >= EEMemoryMap::VIF1_Start)
{
if (!vifWrite32<1>(mem, value)) return;
}
else
{
if (!vifWrite32<0>(mem, value)) return;
}
}
else switch(mem)
{
case (GIF_CTRL):
{
// Not exactly sure what RST needs to do
gifRegs.ctrl.write(value & 9);
if (gifRegs.ctrl.RST) {
GUNIT_LOG("GIF CTRL - Reset");
gifUnit.Reset(true); // Should it reset gsSIGNAL?
//gifUnit.ResetRegs();
}
gifRegs.stat.PSE = gifRegs.ctrl.PSE;
return;
}
case (GIF_MODE):
{
gifRegs.mode.write(value);
//Need to kickstart the GIF if the M3R mask comes off
if (gifRegs.stat.M3R == 1 && gifRegs.mode.M3R == 0 && (gifch.chcr.STR || gif_fifo.fifoSize))
{
DevCon.Warning("GIF Mode cancelling P3 Disable");
CPU_INT(DMAC_GIF, 8);
}
gifRegs.stat.M3R = gifRegs.mode.M3R;
gifRegs.stat.IMT = gifRegs.mode.IMT;
return;
}
}
break;
case 0x08:
case 0x09:
case 0x0a:
case 0x0b:
case 0x0c:
case 0x0d:
case 0x0e:
if (!dmacWrite32<page>(mem, value)) return;
break;
case 0x0f:
{
switch( HELPSWITCH(mem) )
{
mcase(INTC_STAT):
psHu32(INTC_STAT) &= ~value;
//cpuTestINTCInts();
return;
mcase(INTC_MASK):
psHu32(INTC_MASK) ^= (u16)value;
cpuTestINTCInts();
return;
mcase(SIO_TXFIFO):
{
u8* woot = (u8*)&value;
// [Ps2Confirm] What happens when we write 32 bit values to SIO_TXFIFO?
// If it works like the IOP, then all 32 bits are written to the FIFO in
// order. PCSX2 up to this point simply ignored non-8bit writes to this port.
_hwWrite8<0x0f>(SIO_TXFIFO, woot[0]);
_hwWrite8<0x0f>(SIO_TXFIFO, woot[1]);
_hwWrite8<0x0f>(SIO_TXFIFO, woot[2]);
_hwWrite8<0x0f>(SIO_TXFIFO, woot[3]);
}
return;
mcase(SBUS_F200):
// Performs a standard psHu32 assignment (which is the default action anyway).
//psHu32(mem) = value;
break;
mcase(SBUS_F220):
psHu32(mem) |= value;
return;
mcase(SBUS_F230):
psHu32(mem) &= ~value;
return;
mcase(SBUS_F240):
if (value & (1 << 18))
{
iopIntcIrq(1);
}
if (value & (1 << 19))
{
u32 cycle = psxRegs.cycle;
//pgifInit();
psxReset();
PSXCLK = 33868800;
SPU2::Reset(true);
setPs1CDVDSpeed(cdvd.Speed);
psxHu32(0x1f801450) = 0x8;
psxHu32(0x1f801078) = 1;
psxRegs.cycle = cycle;
}
if(!(value & 0x100))
psHu32(mem) &= ~0x100;
else
psHu32(mem) |= 0x100;
return;
mcase(SBUS_F260):
#if PSX_EXTRALOGS
DevCon.Warning("Write SBUS_F260 %x ", psHu32(SBUS_F260));
#endif
psHu32(mem) = value;
return;
// TODO: psx handling is done in the default case. Keep the code until we decide if we decide which interface to use (sif2/Pgif dma)
#if 0
mcase(SBUS_F300) :
psxHu32(0x1f801814) = value;
/*
if (sif2.fifo.size == 0) psxHu32(0x1f801814) |= 0x4000000;
switch ((psxHu32(HW_PS1_GPU_STATUS) >> 29) & 0x3)
{
case 0x0:
//DevCon.Warning("Set DMA Mode OFF");
psxHu32(HW_PS1_GPU_STATUS) &= ~0x2000000;
break;
case 0x1:
//DevCon.Warning("Set DMA Mode FIFO");
psxHu32(HW_PS1_GPU_STATUS) |= 0x2000000;
break;
case 0x2:
//DevCon.Warning("Set DMA Mode CPU->GPU");
psxHu32(HW_PS1_GPU_STATUS) = (psxHu32(HW_PS1_GPU_STATUS) & ~0x2000000) | ((psxHu32(HW_PS1_GPU_STATUS) & 0x10000000) >> 3);
break;
case 0x3:
//DevCon.Warning("Set DMA Mode GPUREAD->CPU");
psxHu32(HW_PS1_GPU_STATUS) = (psxHu32(HW_PS1_GPU_STATUS) & ~0x2000000) | ((psxHu32(HW_PS1_GPU_STATUS) & 0x8000000) >> 2);
break;
}*/
//psHu32(mem) = 0;
return;
mcase(SBUS_F380) :
psHu32(mem) = value;
return;
#endif
mcase(MCH_RICM)://MCH_RICM: x:4|SA:12|x:5|SDEV:1|SOP:4|SBC:1|SDEV:5
if ((((value >> 16) & 0xFFF) == 0x21) && (((value >> 6) & 0xF) == 1) && (((psHu32(0xf440) >> 7) & 1) == 0))//INIT & SRP=0
rdram_sdevid = 0; // if SIO repeater is cleared, reset sdevid
psHu32(mem) = value & ~0x80000000; //kill the busy bit
return;
mcase(MCH_DRD):
// Performs a standard psHu32 assignment (which is the default action anyway).
//psHu32(mem) = value;
break;
mcase(DMAC_ENABLEW):
if (!dmacWrite32<0x0f>(DMAC_ENABLEW, value)) return;
break;
default:
// TODO: psx add the real address in a sbus mcase
if (((mem & 0x1FFFFFFF) >= EEMemoryMap::SBUS_PS1_Start) && ((mem & 0x1FFFFFFF) < EEMemoryMap::SBUS_PS1_End)) {
// Tharr be console spam here! Need to figure out how to print what mode
//pgifConLog(L"Pgif DMA: set mode");.
PGIFw((mem & 0x1FFFFFFF), value);
return;
}
//mcase(SIO_ISR):
//mcase(0x1000f410):
// Mystery Regs! No one knows!?
// (unhandled so fall through to default)
}
}
break;
}
psHu32(mem) = value;
}
template<uint page>
void hwWrite32( u32 mem, u32 value )
{
eeHwTraceLog( mem, value, false );
_hwWrite32<page>( mem, value );
}
// --------------------------------------------------------------------------------------
// hwWrite8 / hwWrite16 / hwWrite64 / hwWrite128
// --------------------------------------------------------------------------------------
template< uint page >
void _hwWrite8(u32 mem, u8 value)
{
#if PSX_EXTRALOGS
if ((mem & 0x1000ff00) == 0x1000f300) DevCon.Warning("8bit Write to SIF Register %x value %x wibble", mem, value);
#endif
if (mem == SIO_TXFIFO)
{
static bool included_newline = false;
static char sio_buffer[1024];
static int sio_count;
if (value == '\r')
{
included_newline = true;
sio_buffer[sio_count++] = '\n';
}
else if (!included_newline || (value != '\n'))
{
included_newline = false;
sio_buffer[sio_count++] = value;
}
if ((sio_count == std::size(sio_buffer)-1) || (sio_count != 0 && sio_buffer[sio_count-1] == '\n'))
{
sio_buffer[sio_count] = 0;
eeConLog( ShiftJIS_ConvertString(sio_buffer) );
sio_count = 0;
}
return;
}
switch(mem & ~3)
{
case DMAC_STAT:
case INTC_STAT:
case INTC_MASK:
case DMAC_FAKESTAT:
DevCon.Warning ( "8bit write mem = %x value %x", mem, value );
_hwWrite32<page>(mem & ~3, (u32)value << (mem & 3) * 8);
return;
}
u32 merged = _hwRead32<page,false>(mem & ~0x03);
((u8*)&merged)[mem & 0x3] = value;
_hwWrite32<page>(mem & ~0x03, merged);
}
template< uint page >
void hwWrite8(u32 mem, u8 value)
{
eeHwTraceLog( mem, value, false );
_hwWrite8<page>(mem, value);
}
template< uint page >
void _hwWrite16(u32 mem, u16 value)
{
pxAssume( (mem & 0x01) == 0 );
#if PSX_EXTRALOGS
if ((mem & 0x1000ff00) == 0x1000f300) DevCon.Warning("16bit Write to SIF Register %x wibble", mem);
#endif
switch(mem & ~3)
{
case DMAC_STAT:
case INTC_STAT:
case INTC_MASK:
case DMAC_FAKESTAT:
DevCon.Warning ( "16bit write mem = %x value %x", mem, value );
_hwWrite32<page>(mem & ~3, (u32)value << (mem & 3) * 8);
return;
}
u32 merged = _hwRead32<page,false>(mem & ~0x03);
((u16*)&merged)[(mem>>1) & 0x1] = value;
hwWrite32<page>(mem & ~0x03, merged);
}
template< uint page >
void hwWrite16(u32 mem, u16 value)
{
eeHwTraceLog( mem, value, false );
_hwWrite16<page>(mem, value);
}
template<uint page>
void _hwWrite64( u32 mem, u64 value )
{
pxAssume( (mem & 0x07) == 0 );
// * Only the IPU has true 64 bit registers.
// * FIFOs have 128 bit registers that are probably zero-fill.
// * All other registers likely disregard the upper 32-bits and simply act as normal
// 32-bit writes.
#if PSX_EXTRALOGS
if ((mem & 0x1000ff00) == 0x1000f300) DevCon.Warning("64bit Write to SIF Register %x wibble", mem);
#endif
switch (page)
{
case 0x02:
if (!ipuWrite64(mem, value)) return;
break;
case 0x04:
case 0x05:
case 0x06:
case 0x07:
{
u128 zerofill = u128::From32(0);
zerofill._u64[(mem >> 3) & 0x01] = value;
hwWrite128<page>(mem & ~0x0f, r128_from_u128(zerofill));
}
return;
default:
// disregard everything except the lower 32 bits.
// ... and skip the 64 bit writeback since the 32-bit one will suffice.
hwWrite32<page>( mem, value );
return;
}
std::memcpy(&eeHw[(mem) & 0xffff], &value, sizeof(value));
}
template<uint page>
void hwWrite64( u32 mem, mem64_t value )
{
eeHwTraceLog( mem, value, false );
_hwWrite64<page>(mem, value);
}
template< uint page >
void TAKES_R128 _hwWrite128(u32 mem, r128 srcval)
{
pxAssume( (mem & 0x0f) == 0 );
// FIFOs are the only "legal" 128 bit registers. Handle them first.
// all other registers fall back on the 64-bit handler (and from there
// most of them fall back to the 32-bit handler).
#if PSX_EXTRALOGS
if ((mem & 0x1000ff00) == 0x1000f300) DevCon.Warning("128bit Write to SIF Register %x wibble", mem);
#endif
switch (page)
{
case 0x04:
{
alignas(16) const u128 usrcval = r128_to_u128(srcval);
WriteFIFO_VIF0(&usrcval);
}
return;
case 0x05:
{
alignas(16) const u128 usrcval = r128_to_u128(srcval);
WriteFIFO_VIF1(&usrcval);
}
return;
case 0x06:
{
alignas(16) const u128 usrcval = r128_to_u128(srcval);
WriteFIFO_GIF(&usrcval);
}
return;
case 0x07:
if (mem & 0x10)
{
alignas(16) const u128 usrcval = r128_to_u128(srcval);
WriteFIFO_IPUin(&usrcval);
}
else
{
// [Ps2Confirm] Most likely writes to IPUout will be silently discarded. A test
// to confirm such would be easy -- just dump some data to FIFO_IPUout and see
// if the program causes BUSERR or something on the PS2.
//WriteFIFO_IPUout(srcval);
}
return;
case 0x0F:
// todo: psx mode: this is new
if (((mem & 0x1FFFFFFF) >= EEMemoryMap::SBUS_PS1_Start) && ((mem & 0x1FFFFFFF) < EEMemoryMap::SBUS_PS1_End)) {
alignas(16) const u128 usrcval = r128_to_u128(srcval);
PGIFwQword((mem & 0x1FFFFFFF), (void*)&usrcval);
return;
}
default: break;
}
// All upper bits of all non-FIFO 128-bit HW writes are almost certainly disregarded. --air
hwWrite64<page>(mem, r128_to_u64(srcval));
//CopyQWC(&psHu128(mem), srcval);
}
template< uint page >
void TAKES_R128 hwWrite128(u32 mem, r128 srcval)
{
eeHwTraceLog( mem, srcval, false );
_hwWrite128<page>(mem, srcval);
}
#define InstantizeHwWrite(pageidx) \
template void hwWrite8<pageidx>(u32 mem, mem8_t value); \
template void hwWrite16<pageidx>(u32 mem, mem16_t value); \
template void hwWrite32<pageidx>(u32 mem, mem32_t value); \
template void hwWrite64<pageidx>(u32 mem, mem64_t value); \
template void TAKES_R128 hwWrite128<pageidx>(u32 mem, r128 srcval);
InstantizeHwWrite(0x00); InstantizeHwWrite(0x08);
InstantizeHwWrite(0x01); InstantizeHwWrite(0x09);
InstantizeHwWrite(0x02); InstantizeHwWrite(0x0a);
InstantizeHwWrite(0x03); InstantizeHwWrite(0x0b);
InstantizeHwWrite(0x04); InstantizeHwWrite(0x0c);
InstantizeHwWrite(0x05); InstantizeHwWrite(0x0d);
InstantizeHwWrite(0x06); InstantizeHwWrite(0x0e);
InstantizeHwWrite(0x07); InstantizeHwWrite(0x0f);
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