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Naomi: implemented Wave DMA HW trigger and added Wave DMA IRQ firing [Angelo Salese]

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This commit is contained in:
Angelo Salese 2010-04-25 13:25:19 +00:00
parent 61fc12d8d7
commit aac06821a8
1 changed files with 81 additions and 50 deletions
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131
src/mame/machine/dc.c
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@ -165,6 +165,64 @@ static const UINT32 maple0x82answer_31kHz[]=
0x05200083,0x5245544e,0x53495250,0x43205345,0x544c2c4f,0x20202e44,0x38393931,0x5c525043
};
static struct {
UINT32 aica_addr;
UINT32 root_addr;
UINT32 size;
UINT8 dir;
UINT8 flag;
UINT8 indirect;
UINT8 start;
UINT8 sel;
}wave_dma;
static TIMER_CALLBACK( aica_dma_irq )
{
dc_sysctrl_regs[SB_ISTNRM] |= IST_DMA_AICA;
dc_update_interrupt_status(machine);
}
static void wave_dma_execute(const address_space *space)
{
UINT32 src,dst,size;
dst = wave_dma.aica_addr;
src = wave_dma.root_addr;
size = 0;
/* 0 rounding size = 32 Mbytes */
if(wave_dma.size == 0) { wave_dma.size = 0x200000; }
if(wave_dma.dir == 0)
{
for(;size<wave_dma.size;size+=4)
{
memory_write_dword_64le(space,dst,memory_read_dword(space,src));
src+=4;
dst+=4;
}
}
else
{
for(;size<wave_dma.size;size+=4)
{
memory_write_dword_64le(space,src,memory_read_dword(space,dst));
src+=4;
dst+=4;
}
}
/* update the params*/
wave_dma.aica_addr = g2bus_regs[SB_ADSTAG] = dst;
wave_dma.root_addr = g2bus_regs[SB_ADSTAR] = src;
wave_dma.size = g2bus_regs[SB_ADLEN] = 0;
wave_dma.flag = (wave_dma.indirect & 1) ? 1 : 0;
wave_dma.start = g2bus_regs[SB_ADST] = 0;
/* Note: if you trigger an instant DMA IRQ trigger, sfz3upper doesn't play any bgm. */
/* TODO: timing of this */
timer_set(space->machine, ATTOTIME_IN_USEC(300), NULL, 0, aica_dma_irq);
}
// register decode helpers
// this accepts only 32-bit accesses
@ -247,7 +305,7 @@ int dc_compute_interrupt_level(running_machine *machine)
void dc_update_interrupt_status(running_machine *machine)
{
int level;
int level;
if (dc_sysctrl_regs[SB_ISTERR])
{
@ -269,6 +327,18 @@ int level;
level=dc_compute_interrupt_level(machine);
sh4_set_irln_input(devtag_get_device(machine, "maincpu"), 15-level);
/* Wave DMA HW trigger */
if(wave_dma.flag && ((wave_dma.sel & 2) == 2))
{
if((dc_sysctrl_regs[SB_G2DTNRM] & dc_sysctrl_regs[SB_ISTNRM]) || (dc_sysctrl_regs[SB_G2DTEXT] & dc_sysctrl_regs[SB_ISTEXT]))
{
const address_space *space = cputag_get_address_space(machine, "maincpu", ADDRESS_SPACE_PROGRAM);
printf("Wave DMA HW trigger\n");
wave_dma_execute(space);
}
}
}
/******************************************************
@ -478,8 +548,10 @@ WRITE64_HANDLER( dc_sysctrl_w )
address=dc_sysctrl_regs[SB_C2DSTAT];
ddtdata.destination=address;
/* 0 rounding size = 16 Mbytes */
if(dc_sysctrl_regs[SB_C2DLEN] == 0) { dc_sysctrl_regs[SB_C2DLEN] = 0x1000000; }
ddtdata.length=dc_sysctrl_regs[SB_C2DLEN];
if(dc_sysctrl_regs[SB_C2DLEN] == 0)
ddtdata.length = 0x1000000;
else
ddtdata.length = dc_sysctrl_regs[SB_C2DLEN];
ddtdata.size=1;
ddtdata.direction=0;
ddtdata.channel=2;
@ -1180,16 +1252,6 @@ WRITE64_HANDLER( dc_g2_ctrl_w )
int reg;
UINT64 shift;
UINT32 dat;
static struct {
UINT32 aica_addr;
UINT32 root_addr;
UINT32 size;
UINT8 dir;
UINT8 flag;
UINT8 indirect;
UINT8 start;
UINT8 sel;
}wave_dma;
reg = decode_reg32_64(space->machine, offset, mem_mask, &shift);
dat = (UINT32)(data >> shift);
@ -1211,6 +1273,10 @@ WRITE64_HANDLER( dc_g2_ctrl_w )
case SB_ADDIR: wave_dma.dir = (dat & 1); break;
/*dma flag (active HIGH, bug in docs)*/
case SB_ADEN: wave_dma.flag = (dat & 1); break;
/*
SB_ADTSEL
bit 1: (0) Wave DMA thru SB_ADST flag (1) Wave DMA thru irq trigger, defined by SB_G2DTNRM / SB_G2DTEXT
*/
case SB_ADTSEL: wave_dma.sel = dat & 7; break;
/*ready for dma'ing*/
case SB_ADST:
@ -1223,43 +1289,8 @@ WRITE64_HANDLER( dc_g2_ctrl_w )
#endif
//mame_printf_verbose("SB_ADST data %08x\n",dat);
if(wave_dma.flag && wave_dma.start)
{
UINT32 src,dst,size;
dst = wave_dma.aica_addr;
src = wave_dma.root_addr;
size = 0;
/* 0 rounding size = 32 Mbytes */
if(wave_dma.size == 0) { wave_dma.size = 0x200000; }
if(wave_dma.dir == 0)
{
for(;size<wave_dma.size;size+=4)
{
memory_write_dword_64le(space,dst,memory_read_dword(space,src));
src+=4;
dst+=4;
}
}
else
{
for(;size<wave_dma.size;size+=4)
{
memory_write_dword_64le(space,src,memory_read_dword(space,dst));
src+=4;
dst+=4;
}
}
/* update the params*/
wave_dma.aica_addr = g2bus_regs[SB_ADSTAG] = dst;
wave_dma.root_addr = g2bus_regs[SB_ADSTAR] = src;
wave_dma.size = g2bus_regs[SB_ADLEN] = 0;
wave_dma.flag = (wave_dma.indirect & 1) ? 1 : 0;
wave_dma.start = g2bus_regs[SB_ADST] = 0;
/*TODO: this makes the sfz3upper to not play any bgm, understand why. */
//dc_sysctrl_regs[SB_ISTNRM] |= IST_DMA_AICA;
//dc_update_interrupt_status(space->machine);
}
if(wave_dma.flag && wave_dma.start && ((wave_dma.sel & 2) == 0))
wave_dma_execute(space);
break;
case SB_ADSUSP: