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Schedule Aica DMA interrupt instead of raising it immediately. 

Fixes Street Fighters Alpha 3 freeze.
This commit is contained in:
Flyinghead 2018-08-01 16:55:50 +02:00
parent c632fc6619
commit 1e67f9be0b
1 changed files with 31 additions and 12 deletions
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43
core/hw/aica/aica_if.cpp
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@ -9,6 +9,7 @@
#include "hw/holly/sb.h"
#include "types.h"
#include "hw/holly/holly_intc.h"
#include "hw/sh4/sh4_sched.h"
#include <time.h>
@ -16,6 +17,8 @@ VArray2 aica_ram;
u32 VREG;//video reg =P
u32 ARMRST;//arm reset reg
u32 rtc_EN=0;
int dma_sched_id;
u32 GetRTC_now()
{
@ -178,6 +181,28 @@ void aica_Term()
}
int dma_end_sched(int tag, int cycl, int jitt)
{
u32 len=SB_ADLEN & 0x7FFFFFFF;
if (SB_ADLEN & 0x80000000)
SB_ADEN=1;//
else
SB_ADEN=0;//
SB_ADSTAR+=len;
SB_ADSTAG+=len;
SB_ADST = 0x00000000;//dma done
SB_ADLEN = 0x00000000;
SB_ADSUSP |= 0x10;
asic_RaiseInterrupt(holly_SPU_DMA);
return 0;
}
void Write_SB_ADST(u32 addr, u32 data)
{
//0x005F7800 SB_ADSTAG RW AICA:G2-DMA G2 start address
@ -214,18 +239,11 @@ void Write_SB_ADST(u32 addr, u32 data)
WriteMem32_nommu(dst+i,data);
}
*/
if (SB_ADLEN & 0x80000000)
SB_ADEN=1;//
else
SB_ADEN=0;//
SB_ADSUSP &= ~0x10;
SB_ADSTAR+=len;
SB_ADSTAG+=len;
SB_ADST = 0x00000000;//dma done
SB_ADLEN = 0x00000000;
asic_RaiseInterrupt(holly_SPU_DMA);
// Schedule the end of DMA transfer interrupt
int cycles = len * (SH4_MAIN_CLOCK / 2 / 25000000) + 384; // 16 bits @ 25 MHz + some overhead
sh4_sched_request(dma_sched_id, cycles);
}
}
}
@ -299,6 +317,7 @@ void aica_sb_Init()
//sb_regs[((SB_E1ST_addr-SB_BASE)>>2)].flags=REG_32BIT_READWRITE | REG_READ_DATA;
//sb_regs[((SB_E1ST_addr-SB_BASE)>>2)].writeFunction=Write_SB_E1ST;
dma_sched_id = sh4_sched_register(0, &dma_end_sched);
}
void aica_sb_Reset(bool Manual)
@ -307,4 +326,4 @@ void aica_sb_Reset(bool Manual)
void aica_sb_Term()
{
}
}