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cleanup and microoptimizations in SH2 hw handling

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This commit is contained in:
kub 2019-08-31 17:37:18 +02:00
parent f740428b81
commit fe344bd3d8
12 changed files with 308 additions and 247 deletions
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32
pico/32x/sh2soc.c
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@ -399,6 +399,7 @@ void REGPARM(3) sh2_peripheral_write32(u32 a, u32 d, SH2 *sh2)
{
u32 *r = sh2->peri_regs;
u32 old;
struct dmac *dmac;
elprintf_sh2(sh2, EL_32XP, "peri w32 [%08x] %08x @%06x",
a, d, sh2_pc(sh2));
@ -439,22 +440,23 @@ void REGPARM(3) sh2_peripheral_write32(u32 a, u32 d, SH2 *sh2)
else
r[0x110 / 4] = r[0x114 / 4] = r[0x118 / 4] = r[0x11c / 4] = 0; // ?
break;
}
// perhaps starting a DMA?
case 0x18c:
case 0x19c:
case 0x1b0:
dmac = (void *)&sh2->peri_regs[0x180 / 4];
if (a == 0x1b0 && !((old ^ d) & d & DMA_DME))
return;
if (!(dmac->dmaor & DMA_DME))
return;
// perhaps starting a DMA?
if (a == 0x1b0 || a == 0x18c || a == 0x19c) {
struct dmac *dmac = (void *)&sh2->peri_regs[0x180 / 4];
if (a == 0x1b0 && !((old ^ d) & d & DMA_DME))
return;
if (!(dmac->dmaor & DMA_DME))
return;
DRC_SAVE_SR(sh2);
if ((dmac->chan[0].chcr & (DMA_TE|DMA_DE)) == DMA_DE)
dmac_trigger(sh2, &dmac->chan[0]);
if ((dmac->chan[1].chcr & (DMA_TE|DMA_DE)) == DMA_DE)
dmac_trigger(sh2, &dmac->chan[1]);
DRC_RESTORE_SR(sh2);
DRC_SAVE_SR(sh2);
if ((dmac->chan[0].chcr & (DMA_TE|DMA_DE)) == DMA_DE)
dmac_trigger(sh2, &dmac->chan[0]);
if ((dmac->chan[1].chcr & (DMA_TE|DMA_DE)) == DMA_DE)
dmac_trigger(sh2, &dmac->chan[1]);
DRC_RESTORE_SR(sh2);
break;
}
}