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Merge pull request #1334 from tiseno100/master

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Add the PCI & ISA Clock registers of the UMC 8886F
This commit is contained in:
Miran Grča
2021-03-27 00:04:31 +01:00
committed by GitHub
parent 586a72c2bb f8910f4b19
commit b8ce57bfcf
1 changed files with 27 additions and 1 deletions
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28
src/chipset/umc_8886.c
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@@ -42,6 +42,15 @@ Bit 7: Replace SMI request for non-SMM CPU's (1: IRQ15/0: IRQ10)
Function 0 Register 51:
Bit 2: VGA Power Down (0: Standard/1: VESA DPMS)
Function 0 Register 56:
Bit 1-0 ISA Bus Speed
0 0 PCICLK/3
0 1 PCICLK/4
1 0 PCICLK/2
Function 0 Register A4:
Bit 0: Host to PCI Clock (1: 1 by 1/0: 1 by half)
Function 1 Register 4:
Bit 0: Enable Internal IDE
*/
@@ -144,6 +153,22 @@ um8886_write(int func, int addr, uint8_t val, void *priv)
dev->pci_conf_sb[func][addr] = val & 0x4f;
break;
case 0x56:
dev->pci_conf_sb[func][addr] = val;
switch (val & 2)
{
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;
}
break;
case 0x57:
dev->pci_conf_sb[func][addr] = val & 0x38;
break;
@@ -165,7 +190,8 @@ um8886_write(int func, int addr, uint8_t val, void *priv)
break;
case 0xa4:
dev->pci_conf_sb[func][addr] = val & 0x88;
dev->pci_conf_sb[func][addr] = val & 0x89;
cpu_set_pci_speed(cpu_busspeed / ((val & 1) ? 1 : 2));
break;
default: