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UM8886: Slight fixes.

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This commit is contained in:
OBattler
2024-06-13 16:44:44 +02:00
parent a369bc2d05
commit f374ffde36
1 changed files with 33 additions and 17 deletions
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50
src/chipset/umc_8886.c
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@@ -134,6 +134,36 @@ umc_8886_ide_handler(umc_8886_t *dev)
} }
} }
static void
umc_8886_bus_recalc(umc_8886_t *dev)
{
switch (dev->pci_conf_sb[0x00][0xa4] & 0x03) {
case 0x00:
cpu_set_pci_speed(cpu_busspeed / 2);
break;
case 0x01:
cpu_set_pci_speed(cpu_busspeed);
break;
case 0x02:
cpu_set_pci_speed((cpu_busspeed * 2) / 3);
break;
}
switch (dev->pci_conf_sb[0x00][0x56] & 0x03) {
default:
break;
case 0x00:
cpu_set_isa_pci_div(3);
break;
case 0x01:
cpu_set_isa_pci_div(4);
break;
case 0x02:
cpu_set_isa_pci_div(2);
break;
}
}
static void static void
umc_8886_write(int func, int addr, uint8_t val, void *priv) umc_8886_write(int func, int addr, uint8_t val, void *priv)
{ {
@@ -191,20 +221,7 @@ umc_8886_write(int func, int addr, uint8_t val, void *priv)
case 0x56: case 0x56:
dev->pci_conf_sb[func][addr] = val; dev->pci_conf_sb[func][addr] = val;
umc_8886_bus_recalc(dev);
switch (val & 3) {
case 0:
cpu_set_isa_pci_div(3);
break;
case 1:
cpu_set_isa_pci_div(4);
break;
case 2:
cpu_set_isa_pci_div(2);
break;
default:
break;
}
break; break;
case 0xa2: case 0xa2:
@@ -225,7 +242,7 @@ umc_8886_write(int func, int addr, uint8_t val, void *priv)
case 0xa4: case 0xa4:
dev->pci_conf_sb[func][addr] = val; dev->pci_conf_sb[func][addr] = val;
cpu_set_pci_speed(cpu_busspeed / ((val & 1) ? 1 : 2)); umc_8886_bus_recalc(dev);
break; break;
default: default:
@@ -362,8 +379,7 @@ umc_8886_reset(void *priv)
for (uint8_t i = 1; i < 5; i++) /* Disable all IRQ interrupts */ for (uint8_t i = 1; i < 5; i++) /* Disable all IRQ interrupts */
pci_set_irq_routing(i, PCI_IRQ_DISABLED); pci_set_irq_routing(i, PCI_IRQ_DISABLED);
cpu_set_isa_pci_div(3); umc_8886_bus_recalc(dev);
cpu_set_pci_speed(cpu_busspeed / 2);
} }
static void static void