ACPI_STATUS
AcpiExPciConfigSpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
UINT64 *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
ACPI_PCI_ID *PciId;
UINT16 PciRegister;
ACPI_FUNCTION_TRACE (ExPciConfigSpaceHandler);
/*
* The arguments to AcpiOs(Read|Write)PciConfiguration are:
*
* PciSegment is the PCI bus segment range 0-31
* PciBus is the PCI bus number range 0-255
* PciDevice is the PCI device number range 0-31
* PciFunction is the PCI device function number
* PciRegister is the Config space register range 0-255 bytes
*
* Value - input value for write, output address for read
*
*/
PciId = (ACPI_PCI_ID *) RegionContext;
PciRegister = (UINT16) (UINT32) Address;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Pci-Config %u (%u) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
Function, BitWidth, PciId->Segment, PciId->Bus, PciId->Device,
PciId->Function, PciRegister));
switch (Function)
{
case ACPI_READ:
*Value = 0;
Status = AcpiOsReadPciConfiguration (PciId, PciRegister,
Value, BitWidth);
break;
case ACPI_WRITE:
Status = AcpiOsWritePciConfiguration (PciId, PciRegister,
*Value, BitWidth);
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS (Status);
}
static void MsgClaimPci(uintptr_t rcpt, uintptr_t addr, uintptr_t pins)
{
addr &= 0xffff;
ACPI_PCI_ID id = { 0, (addr >> 8) & 0xff, (addr >> 3) & 31, addr & 7 };
log(claim_pci, "claim pci %02x:%02x.%x\n", id.Bus, id.Device, id.Function);
// Set up whatever stuff to track PCI device drivers in general
int irqs[4] = {0};
for (int pin = 0; pin < 4; pin++) {
if (!(pins & (1 << pin))) continue;
ACPI_STATUS status = RouteIRQ(&id, 0, &irqs[pin]);
CHECK_STATUS("RouteIRQ");
log(claim_pci, "%02x:%02x.%x pin %d routed to IRQ %#x\n",
id.Bus, id.Device, id.Function,
pin, irqs[pin]);
}
if (pins & ACPI_PCI_CLAIM_MASTER) {
u64 value;
AcpiOsReadPciConfiguration(&id, PCI_COMMAND, &value, 16);
if (!(value & PCI_COMMAND_MASTER)) {
value |= PCI_COMMAND_MASTER;
AcpiOsWritePciConfiguration(&id, PCI_COMMAND, value, 16);
}
}
pins = (u64)irqs[3] << 48 | (u64)irqs[2] << 32 | irqs[1] << 16 | irqs[0];
send2(MSG_ACPI_CLAIM_PCI, rcpt, addr, pins);
hmod(rcpt, (uintptr_t)pci_device_handles + addr, 0);
return;
failed:
send2(MSG_ACPI_CLAIM_PCI, rcpt, 0, 0);
}
static size_t debugger_buffer_pos = 0;
static void debugger_pre_cmd(void) {
debugger_buffer_pos = 0;
AcpiGbl_MethodExecuting = FALSE;
AcpiGbl_StepToNextCall = FALSE;
AcpiDbSetOutputDestination(ACPI_DB_CONSOLE_OUTPUT);
}