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Add ACPI PCI write function

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This commit is contained in:
Mark
2020-06-25 16:46:40 +03:00
parent c18e95ecc6
commit 4741249218
1 changed files with 25 additions and 1 deletions
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arch/amd64/acpi_osl_hw.c
+25 -1
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@@ -64,7 +64,31 @@ ACPI_STATUS AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Reg, UINT64 *V
}
ACPI_STATUS AcpiOsWritePciConfiguration(ACPI_PCI_ID *PciId, UINT32 Reg, UINT64 Value, UINT32 Width) {
panic("Stub\n");
UINT32 DWordAlignedReg = Reg & ~3;
UINT32 DWord;
if (Width == 32) {
DWord = 0;
} else {
DWord = pci_config_read_dword_legacy(PciId->Bus, PciId->Device, PciId->Function, DWordAlignedReg);
}
switch (Width) {
case 8:
DWord |= (Value & 0xFF) << (Reg - DWordAlignedReg);
pci_config_write_dword_legacy(PciId->Bus, PciId->Device, PciId->Function, DWordAlignedReg, DWord);
return AE_OK;
case 16:
DWord |= (Value & 0xFFFF) << (Reg - DWordAlignedReg);
pci_config_write_dword_legacy(PciId->Bus, PciId->Device, PciId->Function, DWordAlignedReg, DWord);
return AE_OK;
case 32:
_assert(DWordAlignedReg == Reg);
pci_config_write_dword_legacy(PciId->Bus, PciId->Device, PciId->Function, DWordAlignedReg, Value & 0xFFFFFFFF);
return AE_OK;
default:
panic("Unsupported PCI read width: %u\n", Width);
}
return AE_OK;
}