sgilissen/llamaplayer
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Bus: Reduce RAM write delay

Browse Source
This commit is contained in:
Connor McLaughlin
2019-11-27 00:01:47 +10:00
parent b3cf18b593
commit aec01d3890
6 changed files with 64 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
src/core/bus.cpp
View File

@ -225,7 +225,8 @@ std::tuple<TickCount, TickCount, TickCount> Bus::CalculateMemoryTiming(MEMDELAY
const TickCount byte_access_time = first;
const TickCount halfword_access_time = mem_delay.data_bus_16bit ? first : (first + seq);
const TickCount word_access_time = mem_delay.data_bus_16bit ? (first + seq) : (first + seq + seq + seq);
return std::tie(byte_access_time, halfword_access_time, word_access_time);
return std::tie(std::max(byte_access_time - 1, 0), std::max(halfword_access_time - 1, 0),
std::max(word_access_time - 1, 0));
}
void Bus::RecalculateMemoryTimings()
@ -238,14 +239,14 @@ void Bus::RecalculateMemoryTimings()
CalculateMemoryTiming(m_MEMCTRL.spu_delay_size, m_MEMCTRL.common_delay);
Log_TracePrintf("BIOS Memory Timing: %u bit bus, byte=%d, halfword=%d, word=%d",
m_MEMCTRL.bios_delay_size.data_bus_16bit ? 16 : 8, m_bios_access_time[0], m_bios_access_time[1],
m_bios_access_time[2]);
m_MEMCTRL.bios_delay_size.data_bus_16bit ? 16 : 8, m_bios_access_time[0] + 1,
m_bios_access_time[1] + 1, m_bios_access_time[2] + 1);
Log_TracePrintf("CDROM Memory Timing: %u bit bus, byte=%d, halfword=%d, word=%d",
m_MEMCTRL.cdrom_delay_size.data_bus_16bit ? 16 : 8, m_cdrom_access_time[0], m_cdrom_access_time[1],
m_cdrom_access_time[2]);
m_MEMCTRL.cdrom_delay_size.data_bus_16bit ? 16 : 8, m_cdrom_access_time[0] + 1,
m_cdrom_access_time[1] + 1, m_cdrom_access_time[2] + 1);
Log_TracePrintf("SPU Memory Timing: %u bit bus, byte=%d, halfword=%d, word=%d",
m_MEMCTRL.spu_delay_size.data_bus_16bit ? 16 : 8, m_spu_access_time[0], m_spu_access_time[1],
m_spu_access_time[2]);
m_MEMCTRL.spu_delay_size.data_bus_16bit ? 16 : 8, m_spu_access_time[0] + 1, m_spu_access_time[1] + 1,
m_spu_access_time[2] + 1);
}
TickCount Bus::DoInvalidAccess(MemoryAccessType type, MemoryAccessSize size, PhysicalMemoryAddress address, u32& value)