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flycast/core/reios/gdrom_hle.cpp

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/*
Basic gdrom syscall emulation
Adapted from some (very) old pre-nulldc hle code
Bits and pieces from redream (https://github.com/inolen/redream)
*/
#include <cstdio>
#include "types.h"
#include "hw/sh4/sh4_mem.h"
#include "hw/sh4/sh4_sched.h"
#include "hw/sh4/sh4_core.h"
#undef r
#include "gdrom_hle.h"
#include "hw/gdrom/gdromv3.h"
#include "hw/holly/holly_intc.h"
#include "reios.h"
#include "imgread/common.h"
#include <algorithm>
#define SWAP32(a) ((((a) & 0xff) << 24) | (((a) & 0xff00) << 8) | (((a) >> 8) & 0xff00) | (((a) >> 24) & 0xff))
#define debugf(...) DEBUG_LOG(REIOS, __VA_ARGS__)
gdrom_hle_state_t gd_hle_state;
static void GDROM_HLE_ReadSES()
{
u32 s = gd_hle_state.params[0];
u32 b = gd_hle_state.params[1];
u32 ba = gd_hle_state.params[2];
u32 bb = gd_hle_state.params[3];
INFO_LOG(REIOS, "GDROM_HLE_ReadSES: doing nothing w/ %d, %d, %d, %d", s, b, ba, bb);
}
static void GDROM_HLE_ReadTOC()
{
u32 area = gd_hle_state.params[0];
u32 dest = gd_hle_state.params[1];
debugf("GDROM READ TOC : %X %X", area, dest);
if (area == DoubleDensity && libGDR_GetDiscType() != GdRom)
{
// Only GD-ROM has a high-density area but no error is reported
gd_hle_state.status = GDC_OK;
return;
}
u32 toc[102];
libGDR_GetToc(toc, (DiskArea)area);
// Swap results to LE
for (int i = 0; i < 102; i++) {
toc[i] = SWAP32(toc[i]);
}
if (!mmu_enabled())
{
u32* pDst = (u32*)GetMemPtr(dest, sizeof(toc));
if (pDst != NULL)
{
memcpy(pDst, toc, sizeof(toc));
return;
}
}
for (int i = 0; i < 102; i++, dest += 4)
WriteMem32(dest, toc[i]);
}
template<bool virtual_addr>
static void read_sectors_to(u32 addr, u32 sector, u32 count)
{
gd_hle_state.cur_sector = sector + count - 1;
if (virtual_addr)
gd_hle_state.xfer_end_time = 0;
else if (count > 5 && !config::FastGDRomLoad)
// Large Transfers: GD-ROM rate (approx. 1.8 MB/s)
gd_hle_state.xfer_end_time = sh4_sched_now64() + (u64)count * 2048 * 1000000L / 10240;
else
// Small transfers: Max G1 bus rate: 50 MHz x 16 bits
gd_hle_state.xfer_end_time = sh4_sched_now64() + 5 * 2048 * 2;
if (!virtual_addr || !mmu_enabled())
{
u8 * pDst = GetMemPtr(addr, 0);
if (pDst != NULL)
{
libGDR_ReadSector(pDst, sector, count, 2048);
return;
}
}
u32 temp[2048 / 4];
while (count > 0)
{
libGDR_ReadSector((u8 *)temp, sector, 1, sizeof(temp));
for (std::size_t i = 0; i < ARRAY_SIZE(temp); i++)
{
if (virtual_addr)
WriteMem32(addr, temp[i]);
else
WriteMem32_nommu(addr, temp[i]);
addr += 4;
}
sector++;
count--;
}
}
static void GDROM_HLE_ReadDMA()
{
u32 fad = gd_hle_state.params[0];
u32 nsect = gd_hle_state.params[1];
u32 buffer = gd_hle_state.params[2];
// params[3] 0
debugf("GDROM: DMA READ Sector=%d, Num=%d, Buffer=%08x, zero=%x", fad, nsect, buffer, gd_hle_state.params[3]);
read_sectors_to<false>(buffer, fad, nsect);
gd_hle_state.result[2] = 0;
gd_hle_state.result[3] = 0;
}
static void GDROM_HLE_ReadPIO()
{
u32 fad = gd_hle_state.params[0];
u32 nsect = gd_hle_state.params[1];
u32 buffer = gd_hle_state.params[2];
// params[3] seekAhead (wince) or 0
debugf("GDROM: PIO READ Sector=%d, Num=%d, Buffer=%08x, SeekAhead=%x", fad, nsect, buffer, gd_hle_state.params[3]);
read_sectors_to<true>(buffer, fad, nsect);
gd_hle_state.result[2] = nsect * 2048;
gd_hle_state.result[3] = 0;
}
static void GDCC_HLE_GETSCD() {
u32 format = gd_hle_state.params[0];
u32 size = gd_hle_state.params[1];
u32 dest = gd_hle_state.params[2];
// params[3] 0
DEBUG_LOG(REIOS, "GDROM: GETSCD format %x size %x dest %08x", format, size, dest);
if (libGDR_GetDiscType() == Open || libGDR_GetDiscType() == NoDisk)
{
gd_hle_state.status = GDC_ERR;
gd_hle_state.result[0] = 6; // GDC_ERR_UNITATTENTION
gd_hle_state.result[1] = 0;
gd_hle_state.result[2] = 0;
gd_hle_state.result[3] = 0;
return;
}
if (sns_asc != 0)
{
// Helps D2 detect the disk change
gd_hle_state.status = GDC_ERR;
gd_hle_state.result[0] = sns_key;
gd_hle_state.result[1] = sns_asc;
gd_hle_state.result[2] = 0x18; // ?
gd_hle_state.result[3] = sns_ascq; // ?
sns_key = 0;
sns_asc = 0;
sns_ascq = 0;
return;
}
if (cdda.status == cdda_t::Playing)
gd_hle_state.cur_sector = cdda.CurrAddr.FAD;
u8 scd[100];
gd_get_subcode(format, gd_hle_state.cur_sector, scd);
verify(scd[3] == size);
if (!mmu_enabled() && GetMemPtr(dest, size) != NULL)
memcpy(GetMemPtr(dest, size), scd, size);
else
{
for (u32 i = 0; i < size; i++)
WriteMem8(dest++, scd[i]);
}
// record size of pio transfer to gdrom
gd_hle_state.result[2] = size;
}
template<bool dma>
static void multi_xfer()
{
u32 dest = gd_hle_state.params[0];
u32 size = gd_hle_state.params[1];
size = std::min(size, gd_hle_state.multi_read_count);
while (size > 0)
{
u8 buf[2048];
libGDR_ReadSector(buf, gd_hle_state.multi_read_sector, 1, 2048);
while (size > 0)
{
int remaining = 2048 - gd_hle_state.multi_read_offset;
if (size >= 4 && remaining >= 4 && (dest & 3) == 0)
{
if (dma)
WriteMem32_nommu(dest, *(u32*)&buf[gd_hle_state.multi_read_offset]);
else
WriteMem32(dest, *(u32*)&buf[gd_hle_state.multi_read_offset]);
dest += 4;
gd_hle_state.multi_read_offset += 4;
gd_hle_state.multi_read_count -= 4;
size -= 4;
}
else if (size >= 2 && remaining >= 2 && (dest & 1) == 0)
{
if (dma)
WriteMem16_nommu(dest, *(u16*)&buf[gd_hle_state.multi_read_offset]);
else
WriteMem16(dest, *(u16*)&buf[gd_hle_state.multi_read_offset]);
dest += 2;
gd_hle_state.multi_read_offset += 2;
gd_hle_state.multi_read_count -= 2;
size -= 2;
}
else
{
if (dma)
WriteMem8_nommu(dest, buf[gd_hle_state.multi_read_offset]);
else
WriteMem8(dest, buf[gd_hle_state.multi_read_offset]);
dest++;
gd_hle_state.multi_read_offset++;
gd_hle_state.multi_read_count--;
size--;
}
if (gd_hle_state.multi_read_offset >= 2048)
{
verify(gd_hle_state.multi_read_offset == 2048);
gd_hle_state.multi_read_sector++;
gd_hle_state.multi_read_offset = 0;
break;
}
}
}
if (!dma)
{
gd_hle_state.result[2] = gd_hle_state.multi_read_total - gd_hle_state.multi_read_count;
gd_hle_state.result[3] = GDC_WAIT_INTERNAL;
if (gd_hle_state.multi_callback != 0)
{
Sh4cntx.r[4] = gd_hle_state.multi_callback_arg;
Sh4cntx.pc = gd_hle_state.multi_callback;
}
}
else
{
gd_hle_state.result[2] = 2048;
gd_hle_state.result[3] = gd_hle_state.multi_read_count > 0 ? GDC_WAIT_IRQ : GDC_WAIT_INTERNAL;
gd_hle_state.dma_trans_ended = true;
if (gd_hle_state.multi_read_count == 0)
gd_hle_state.status = GDC_COMPLETE;
asic_RaiseInterrupt(holly_GDROM_DMA);
}
}
u32 SecMode[4];
static void GD_HLE_Command(gd_command cc)
{
switch(cc)
{
case GDCC_GETTOC:
WARN_LOG(REIOS, "GDROM: *FIXME* CMD GETTOC");
break;
case GDCC_GETTOC2:
GDROM_HLE_ReadTOC();
break;
case GDCC_REQ_SES:
GDROM_HLE_ReadSES();
break;
case GDCC_INIT:
DEBUG_LOG(REIOS, "GDROM: CMD INIT");
gd_hle_state.multi_callback = 0;
gd_hle_state.multi_read_count = 0;
cdda.status = cdda_t::NoInfo;
break;
case GDCC_PIOREAD:
GDROM_HLE_ReadPIO();
SecNumber.Status = GD_STANDBY;
cdda.status = cdda_t::NoInfo;
break;
case GDCC_DMAREAD:
cdda.status = cdda_t::NoInfo;
if (gd_hle_state.xfer_end_time == 0)
GDROM_HLE_ReadDMA();
if (gd_hle_state.xfer_end_time > 0)
{
if (gd_hle_state.xfer_end_time > sh4_sched_now64())
return;
gd_hle_state.xfer_end_time = 0;
}
gd_hle_state.result[2] = gd_hle_state.params[1] * 2048;
gd_hle_state.result[3] = 0;
SecNumber.Status = GD_STANDBY;
break;
case GDCC_PLAY2:
{
cdda.StartAddr.FAD = gd_hle_state.params[0];
cdda.EndAddr.FAD = gd_hle_state.params[1];
cdda.repeats = gd_hle_state.params[2];
// params[3] debug (0)
DEBUG_LOG(REIOS, "GDROM: CMD PLAYSEC from %d to %d repeats %d", cdda.StartAddr.FAD, cdda.EndAddr.FAD, cdda.repeats);
cdda.status = cdda_t::Playing;
cdda.CurrAddr.FAD = cdda.StartAddr.FAD;
SecNumber.Status = GD_PLAY;
}
break;
case GDCC_RELEASE:
DEBUG_LOG(REIOS, "GDROM: CMD RELEASE");
cdda.repeats = gd_hle_state.params[0];
// params[1] debug (0)
if (cdda.status == cdda_t::Paused)
cdda.status = cdda_t::Playing;
SecNumber.Status = GD_PLAY;
break;
case GDCC_STOP:
DEBUG_LOG(REIOS, "GDROM: CMD STOP");
cdda.status = cdda_t::NoInfo;
SecNumber.Status = GD_STANDBY;
break;
case GDCC_SEEK:
DEBUG_LOG(REIOS, "GDROM: CMD SEEK");
cdda.CurrAddr.FAD = cdda.StartAddr.FAD = gd_hle_state.params[0];
// params[1] debug (0)
cdda.status = cdda_t::Paused;
SecNumber.Status = GD_PAUSE;
break;
case GDCC_PLAY:
{
u32 first_track = gd_hle_state.params[0];
u32 last_track = gd_hle_state.params[1];
cdda.repeats = gd_hle_state.params[2];
// params[3] debug (0)
u32 dummy;
libGDR_GetTrack(first_track, cdda.StartAddr.FAD, dummy);
libGDR_GetTrack(last_track, dummy, cdda.EndAddr.FAD);
DEBUG_LOG(REIOS, "GDROM: CMD PLAY first_track %x last_track %x repeats %x start_fad %x end_fad %x", first_track, last_track, cdda.repeats,
cdda.StartAddr.FAD, cdda.EndAddr.FAD);
cdda.status = cdda_t::Playing;
if ((SecNumber.Status != GD_PLAY && SecNumber.Status != GD_PAUSE)
|| cdda.CurrAddr.FAD < cdda.StartAddr.FAD
|| cdda.CurrAddr.FAD > cdda.EndAddr.FAD)
cdda.CurrAddr.FAD = cdda.StartAddr.FAD;
SecNumber.Status = GD_PLAY;
}
break;
case GDCC_PAUSE:
DEBUG_LOG(REIOS, "GDROM: CMD PAUSE");
if (cdda.status == cdda_t::Playing)
cdda.status = cdda_t::Paused;
SecNumber.Status = GD_PAUSE;
break;
case GDCC_DMA_READ_REQ:
{
u32 sector = gd_hle_state.params[0];
u32 num = gd_hle_state.params[1];
DEBUG_LOG(REIOS, "GDROM: CMD READ Sector=%d, Num=%d", sector, num);
gd_hle_state.status = GDC_CONTINUE;
gd_hle_state.multi_read_sector = sector;
gd_hle_state.multi_read_count = num * 2048;
gd_hle_state.multi_read_total = gd_hle_state.multi_read_count;
gd_hle_state.multi_read_offset = 0;
gd_hle_state.result[2] = 2048;
gd_hle_state.result[3] = num > 0 ? GDC_WAIT_IRQ : GDC_WAIT_INTERNAL;
}
break;
case GDCC_GETSCD:
GDCC_HLE_GETSCD();
break;
case GDCC_REQ_MODE:
{
u32 dest = gd_hle_state.params[0];
debugf("GDROM: REQ_MODE dest:%x", dest);
WriteMem32(dest, GD_HardwareInfo.speed);
WriteMem32(dest + 4, (GD_HardwareInfo.standby_hi << 8) | GD_HardwareInfo.standby_lo);
WriteMem32(dest + 8, GD_HardwareInfo.read_flags);
WriteMem32(dest + 12, GD_HardwareInfo.read_retry);
// record size of pio transfer to gdrom
gd_hle_state.result[2] = 0xa;
}
break;
case GDCC_SET_MODE:
{
u32 speed = gd_hle_state.params[0];
u32 standby = gd_hle_state.params[1];
u32 read_flags = gd_hle_state.params[2];
u32 read_retry = gd_hle_state.params[3];
debugf("GDROM: SET_MODE speed %x standby %x read_flags %x read_retry %x", speed, standby, read_flags, read_retry);
GD_HardwareInfo.speed = speed;
GD_HardwareInfo.standby_hi = (standby & 0xff00) >> 8;
GD_HardwareInfo.standby_lo = standby & 0xff;
GD_HardwareInfo.read_flags = read_flags;
GD_HardwareInfo.read_retry = read_retry;
// record size of pio transfer to gdrom
gd_hle_state.result[2] = 0xa;
}
break;
case GDCC_GET_VERSION:
{
u32 dest = gd_hle_state.params[0];
// params[1] 0
debugf("GDROM: GDCC_GET_VERSION dest %x", dest);
char ver[] = "GDC Version 1.10 1999-03-31 ";
u32 len = (u32)strlen(ver);
// 0x8c0013b8 (offset 0xd0 in the gdrom state struct) is then loaded and
// overwrites the last byte. no idea what this is, but seems to be hard
// coded to 0x02 on boot
ver[len - 1] = 0x02;
for (u32 i = 0; i < len; i++)
WriteMem8(dest++, ver[i]);
}
break;
case GDCC_REQ_STAT:
{
// odd, but this function seems to get passed 4 unique pointers
u32 dst0 = gd_hle_state.params[0]; // repeat
u32 dst1 = gd_hle_state.params[1]; // track
u32 dst2 = gd_hle_state.params[2]; // toc
u32 dst3 = gd_hle_state.params[3]; // index
debugf("GDROM: GDCC_REQ_STAT dst0=%08x dst1=%08x dst2=%08x dst3=%08x", dst0, dst1, dst2, dst3);
// bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
// byte | | | | | | | |
// ------------------------------------------------------
// 0 | 0 | 0 | 0 | 0 | status
// ------------------------------------------------------
// 1 | 0 | 0 | 0 | 0 | repeat count
// ------------------------------------------------------
// 2-3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
WriteMem32(dst0, (cdda.repeats << 8) | (SecNumber.Status == GD_STANDBY ? GD_PAUSE : SecNumber.Status));
// bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
// byte | | | | | | | |
// ------------------------------------------------------
// 0 | subcode q track number
// ------------------------------------------------------
// 1-3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
u32 elapsed;
u32 tracknum = libGDR_GetTrackNumber(gd_hle_state.cur_sector, elapsed);
WriteMem32(dst1, tracknum);
// bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
// byte | | | | | | | |
// ------------------------------------------------------
// 0-2 | fad (little-endian)
// ------------------------------------------------------
// 3 | address | control
u32 out = (((SecNumber.DiscFormat == 0 ? 0 : 0x40) | 1) << 24)
| (gd_hle_state.cur_sector & 0x00ffffff);
WriteMem32(dst2, out);
// bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
// byte | | | | | | | |
// ------------------------------------------------------
// 0 | subcode q index number
// ------------------------------------------------------
// 1-3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
WriteMem32(dst3, 1);
// record pio transfer size
gd_hle_state.result[2] = 0xa;
}
break;
case GDCC_MULTI_DMAREAD:
case GDCC_MULTI_PIOREAD:
{
u32 sector = gd_hle_state.params[0];
u32 num = gd_hle_state.params[1];
// params[2] seekAhead (wince)
bool dma = cc == GDCC_MULTI_DMAREAD;
DEBUG_LOG(REIOS, "GDROM: MULTI_%sREAD Sector=%d, Num=%d SeekAhead=%d", dma ? "DMA" : "PIO", sector, num, gd_hle_state.params[2]);
gd_hle_state.status = GDC_CONTINUE;
gd_hle_state.multi_read_sector = sector;
gd_hle_state.multi_read_count = num * 2048;
gd_hle_state.multi_read_total = gd_hle_state.multi_read_count;
gd_hle_state.multi_read_offset = 0;
// wild guesses here
gd_hle_state.result[2] = 0;
gd_hle_state.result[3] = 0;
}
break;
case GDCC_REQ_DMA_TRANS:
case GDCC_REQ_PIO_TRANS:
{
u32 dest = gd_hle_state.params[0];
u32 size = gd_hle_state.params[1];
bool dma = cc == GDCC_REQ_DMA_TRANS;
DEBUG_LOG(REIOS, "GDROM: REQ_%s_TRANS dest %x size %x", dma ? "DMA" : "PIO",
dest, size);
if (dma)
multi_xfer<true>();
else
multi_xfer<false>();
}
break;
default:
WARN_LOG(REIOS, "GDROM: Unknown GDROM CC:%X", cc);
break;
}
if (gd_hle_state.status == GDC_BUSY)
gd_hle_state.status = GDC_COMPLETE;
gd_hle_state.command = GDCC_NONE;
}
#define r Sh4cntx.r
void gdrom_hle_op()
{
if (SYSCALL_GDROM == r[6]) // GDROM SYSCALL
{
switch(r[7]) // COMMAND CODE
{
case GDROM_REQ_CMD:
// Enqueue a command for the GDROM subsystem to execute.
//
// Args:
// r4 = command code
// r5 = pointer to parameter block for the command, can be NULL if the command does not take parameters
//
// Returns: a request id (>0) if successful, 0 if failed
debugf("GDROM: HLE REQ_CMD CC:%X param ptr: %X bios status %d", r[4], r[5], gd_hle_state.status);
if (gd_hle_state.status != GDC_OK)
{
r[0] = 0;
}
else
{
for (int i = 0; i < 4; i++)
{
try {
gd_hle_state.params[i] = r[5] == 0 ? 0 : ReadMem32(r[5] + i * 4);
} catch (SH4ThrownException&) {
// Ignore page faults. happens for commands not taking params
gd_hle_state.params[i] = 0;
}
}
memset(gd_hle_state.result, 0, sizeof(gd_hle_state.result));
if (gd_hle_state.next_request_id == ~0u || gd_hle_state.next_request_id == 0)
gd_hle_state.next_request_id = 1;
gd_hle_state.last_request_id = r[0] = gd_hle_state.next_request_id++;
gd_hle_state.status = GDC_BUSY;
gd_hle_state.command = (gd_command)r[4];
gd_hle_state.multi_read_count = 0;
}
break;
case GDROM_GET_CMD_STAT:
// Check if an enqueued command has completed.
//
// Args:
// r4 = request id
// r5 = pointer to four 32 bit integers to receive extended status information. The first is a generic error code:
// GDC_ERR_NOERR 0x00
// GDC_ERR_RECOVERED 0x01
// GDC_ERR_NOTREADY 0x02
// GDC_ERR_MEDIUM 0x03
// GDC_ERR_HARDWARE 0x04
// GDC_ERR_ILLEGALREQUEST 0x05
// GDC_ERR_UNITATTENTION 0x06
// GDC_ERR_DATAPROTECT 0x07
// GDC_ERR_ABORTED 0x0B
// GDC_ERR_NOREADABLE 0x10
// GDC_ERR_G1SEMAPHORE 0x20
//
// Returns:
// GDC_OK - no such request active (idle)
// GDC_BUSY - request is still being processed
// GDC_COMPLETE - request has completed (if queried again, you will get GDC_OK)
// GDC_CONTINUE - multi request has data available
// GDC_SMPHR_BUSY ?
// GDC_ERR - request has failed (examine extended status information for cause of failure)
try {
WriteMem32(r[5], gd_hle_state.result[0]); // error
WriteMem32(r[5] + 4, gd_hle_state.result[1]); // error1
WriteMem32(r[5] + 8, gd_hle_state.result[2]); // size
WriteMem32(r[5] + 12, gd_hle_state.result[3]); // wait state (if busy)
} catch (SH4ThrownException&) {
}
if (gd_hle_state.status == GDC_OK || gd_hle_state.status == GDC_BUSY)
{
r[0] = gd_hle_state.status;
}
else if (r[4] != gd_hle_state.last_request_id)
{
r[0] = GDC_OK; // no such request active
}
else
{
if (gd_hle_state.status == GDC_CONTINUE && gd_hle_state.command == GDCC_REQ_PIO_TRANS)
r[0] = GDC_BUSY; // Bust-a-move 4 likes this
else
r[0] = gd_hle_state.status; // completed or error
// Fixes NBA 2K
if (gd_hle_state.status == GDC_CONTINUE && gd_hle_state.multi_read_count == 0)
{
gd_hle_state.status = GDC_COMPLETE;
gd_hle_state.result[3] = 0;
}
else if (gd_hle_state.status != GDC_CONTINUE)
{
gd_hle_state.status = GDC_OK;
gd_hle_state.last_request_id = 0xFFFFFFFF;
}
}
debugf("GDROM: HLE GET_CMD_STAT REQID:%X param ptr: %X -> %X : %x %x %x %x", r[4], r[5], r[0],
gd_hle_state.result[0], gd_hle_state.result[1], gd_hle_state.result[2], gd_hle_state.result[3]);
break;
case GDROM_EXEC_SERVER:
// In order for enqueued commands to get processed, this function must be called a few times.
debugf("GDROM: HLE EXEC_SERVER");
if (gd_hle_state.status == GDC_BUSY || (gd_hle_state.status == GDC_CONTINUE && gd_hle_state.command == GDCC_REQ_PIO_TRANS))
{
GD_HLE_Command(gd_hle_state.command);
}
break;
case GDROM_INIT_SYSTEM:
// Initialize the GDROM subsystem. Should be called before any requests are enqueued.
DEBUG_LOG(REIOS, "GDROM: HLE INIT_SYSTEM");
gd_hle_state = {};
break;
case GDROM_RESET:
// Resets the drive.
DEBUG_LOG(REIOS, "GDROM: HLE RESET");
gd_hle_state.last_request_id = 0xFFFFFFFF;
gd_hle_state.status = GDC_OK;
break;
case GDROM_GET_DRV_STAT:
{
// Checks the general condition of the drive.
//
// Args:
// r4 = pointer to two 32 bit integers, to receive the drive status. The first is the current drive status (gd_drv_stat),
// the second is the type of disc inserted (if any).
//
// Returns: 0 OK, -1 ERR, 1 BUSY, 2 COMPLETE, 3 CONTINUE
gd_drv_stat status;
u32 discType = libGDR_GetDiscType();
switch (discType)
{
case Open:
status = GD_STAT_OPEN;
discType = 0;
break;
case NoDisk:
status = GD_STAT_NODISC;
discType = 0;
break;
default:
if (gd_hle_state.status == GDC_CONTINUE || SecNumber.Status == GD_PLAY)
status = GD_STAT_PLAY;
else
status = GD_STAT_PAUSE;
if (memcmp(ip_meta.disk_type, "GD-ROM", sizeof(ip_meta.disk_type)) == 0)
discType = GdRom;
break;
}
WriteMem32(r[4], (u32)status);
WriteMem32(r[4] + 4, discType);
debugf("GDROM: HLE GET_DRV_STAT r4:%X -> %x %x", r[4], status, discType);
r[0] = GDC_OK;
}
break;
case GDROM_READ_ABORT:
// Tries to abort a previously enqueued command.
//
// Args:
// r4 = request id
//
// Returns: GDC_OK, GDC_ERR
WARN_LOG(REIOS, "GDROM: HLE GDROM_ABORT_COMMAND req id%x", r[4]);
if (r[4] == gd_hle_state.last_request_id
&& (gd_hle_state.status == GDC_CONTINUE || gd_hle_state.status == GDC_BUSY || gd_hle_state.status == GDC_COMPLETE))
{
r[0] = GDC_OK;
gd_hle_state.multi_read_count = 0;
gd_hle_state.xfer_end_time = 0;
}
else
{
r[0] = GDC_ERR;
}
break;
case GDROM_CHANGE_DATA_TYPE:
// Sets/gets the sector format for read commands.
//
// Args:
// r4 = pointer to a struct of four 32 bit integers containing new values, or to receive the old values
// Field Function
// 0 Get/Set, if 0 the mode will be set, if 1 it will be queried.
// 1 ? (always 8192)
// 2 1024 = mode 1, 2048 = mode 2, 0 = auto detect
// 3 Sector size in bytes (normally 2048)
//
// Returns: GDC_OK, GDC_ERR
DEBUG_LOG(REIOS, "GDROM: HLE CHANGE_DATA_TYPE PTR_r4:%X",r[4]);
for(int i=0; i<4; i++) {
SecMode[i] = ReadMem32(r[4]+(i<<2));
DEBUG_LOG(REIOS, "%08X", SecMode[i]);
}
r[0] = GDC_OK;
break;
case GDROM_G1_DMA_END:
DEBUG_LOG(REIOS, "GDROM: G1_DMA_END callback %x arg %x", r[4], r[5]);
gd_hle_state.multi_callback = r[4];
gd_hle_state.multi_callback_arg = r[5];
r[0] = GDC_OK;
if (gd_hle_state.multi_callback != 0 && gd_hle_state.dma_trans_ended) // FIXME hack for 2K sports games
{
r[4] = gd_hle_state.multi_callback_arg;
Sh4cntx.pc = gd_hle_state.multi_callback;
gd_hle_state.dma_trans_ended = false;
}
asic_CancelInterrupt(holly_GDROM_DMA);
break;
case GDROM_REQ_DMA_TRANS:
gd_hle_state.params[0] = ReadMem32(r[5]); // buffer
gd_hle_state.params[1] = ReadMem32(r[5] + 4); // size
DEBUG_LOG(REIOS, "GDROM: REQ_DMA_TRANS req_id %x dest %x size %x",
r[4], gd_hle_state.params[0], gd_hle_state.params[1]);
if (gd_hle_state.status != GDC_CONTINUE || gd_hle_state.params[1] > gd_hle_state.multi_read_count || gd_hle_state.params[1] == 0)
{
r[0] = GDC_ERR;
}
else
{
multi_xfer<true>();
r[0] = GDC_OK;
}
break;
case GDROM_REQ_PIO_TRANS:
gd_hle_state.params[0] = ReadMem32(r[5]);
gd_hle_state.params[1] = ReadMem32(r[5] + 4);
DEBUG_LOG(REIOS, "GDROM: REQ_PIO_TRANS req_id %x dest %x size %x",
r[4], gd_hle_state.params[0], gd_hle_state.params[1]);
if (gd_hle_state.status != GDC_CONTINUE || gd_hle_state.params[1] > gd_hle_state.multi_read_count)
{
r[0] = GDC_ERR;
}
else
{
gd_hle_state.command = GDCC_REQ_PIO_TRANS;
r[0] = GDC_OK;
}
break;
case GDROM_CHECK_DMA_TRANS:
{
// r4 handle
u32 len_addr = r[5];
DEBUG_LOG(REIOS, "GDROM: CHECK_DMA_TRANS req_id %x len_addr %x -> %x", r[4], len_addr, gd_hle_state.multi_read_count);
WriteMem32(len_addr, gd_hle_state.multi_read_count);
if (gd_hle_state.status == GDC_CONTINUE)
{
r[0] = GDC_OK;
}
else
{
r[0] = GDC_BUSY;
}
}
break;
case GDROM_SET_PIO_CALLBACK:
DEBUG_LOG(REIOS, "GDROM: SET_PIO_CALLBACK callback %x arg %x", r[4], r[5]);
gd_hle_state.multi_callback = r[4];
gd_hle_state.multi_callback_arg = r[5];
r[0] = GDC_OK;
break;
case GDROM_CHECK_PIO_TRANS:
{
u32 len_addr = r[5];
DEBUG_LOG(REIOS, "GDROM: CHECK_PIO_TRANS req_id %x len_addr %x -> %x", r[4], len_addr, gd_hle_state.multi_read_count);
if (gd_hle_state.status == GDC_CONTINUE)
{
WriteMem32(len_addr, gd_hle_state.multi_read_count);
r[0] = GDC_OK;
}
else
{
r[0] = GDC_ERR;
}
}
break;
default:
WARN_LOG(REIOS, "GDROM: Unknown SYSCALL: %X",r[7]);
break;
}
}
else // MISC
{
switch(r[7])
{
case MISC_INIT:
// Initializes all the syscall vectors to their default values.
// Returns: zero
WARN_LOG(REIOS, "GDROM: MISC_INIT not implemented");
r[0] = GDC_OK;
break;
case MISC_SETVECTOR:
// Sets/clears the handler for one of the eight superfunctions for this vector. Setting a handler is only allowed if it not currently set.
//
// Args:
// r4 = superfunction number (0-7)
// r5 = pointer to handler function, or NULL to clear
//
// Returns: zero if successful, -1 if setting/clearing the handler fails
WARN_LOG(REIOS, "GDROM: MISC_SETVECTOR not implemented");
break;
default:
WARN_LOG(REIOS, "GDROM: Unknown MISC command %x", r[7]);
break;
}
}
}
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