ACPI_STATUS
AcpiHwReadPort (
ACPI_IO_ADDRESS Address,
UINT32 *Value,
UINT32 Width)
{
ACPI_STATUS Status;
UINT32 OneByte;
UINT32 i;
/* Truncate address to 16 bits if requested */
if (AcpiGbl_TruncateIoAddresses)
{
Address &= ACPI_UINT16_MAX;
}
/* Validate the entire request and perform the I/O */
Status = AcpiHwValidateIoRequest (Address, Width);
if (ACPI_SUCCESS (Status))
{
Status = AcpiOsReadPort (Address, Value, Width);
return (Status);
}
if (Status != AE_AML_ILLEGAL_ADDRESS)
{
return (Status);
}
/*
* There has been a protection violation within the request. Fall
* back to byte granularity port I/O and ignore the failing bytes.
* This provides Windows compatibility.
*/
for (i = 0, *Value = 0; i < Width; i += 8)
{
/* Validate and read one byte */
if (AcpiHwValidateIoRequest (Address, 8) == AE_OK)
{
Status = AcpiOsReadPort (Address, &OneByte, 8);
if (ACPI_FAILURE (Status))
{
return (Status);
}
*Value |= (OneByte << i);
}
Address++;
}
return (AE_OK);
}
void
AcpiHwGetGpeStatus (
UINT32 GpeNumber,
ACPI_EVENT_STATUS *EventStatus)
{
UINT32 InByte = 0;
UINT32 RegisterIndex = 0;
UINT32 BitMask = 0;
FUNCTION_ENTRY ();
if (!EventStatus)
{
return;
}
(*EventStatus) = 0;
/*
* Translate GPE number to index into global registers array.
*/
RegisterIndex = AcpiGbl_GpeValid[GpeNumber];
/*
* Figure out the bit offset for this GPE within the target register.
*/
BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)];
/*
* Enabled?:
*/
InByte = 0;
AcpiOsReadPort (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, &InByte, 8);
if (BitMask & InByte)
{
(*EventStatus) |= ACPI_EVENT_FLAG_ENABLED;
}
/*
* Set?
*/
InByte = 0;
AcpiOsReadPort (AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr, &InByte, 8);
if (BitMask & InByte)
{
(*EventStatus) |= ACPI_EVENT_FLAG_SET;
}
}
void
AcpiHwDisableGpe (
UINT32 GpeNumber)
{
UINT32 InByte;
UINT32 RegisterIndex;
UINT32 BitMask;
FUNCTION_ENTRY ();
/*
* Translate GPE number to index into global registers array.
*/
RegisterIndex = AcpiGbl_GpeValid[GpeNumber];
/*
* Figure out the bit offset for this GPE within the target register.
*/
BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)];
/*
* Read the current value of the register, clear the appropriate bit,
* and write out the new register value to disable the GPE.
*/
InByte = 0;
AcpiOsReadPort (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, &InByte, 8);
AcpiOsWritePort (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr,
(InByte & ~BitMask), 8);
}
static uint8_t
thinkpad_brightness_read(thinkpad_softc_t *sc)
{
uint32_t val = 0;
AcpiOsWritePort(IO_RTC, 0x6c, 8);
AcpiOsReadPort(IO_RTC + 1, &val, 8);
return val & 7;
}
ACPI_STATUS
AcpiExSystemIoSpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
ACPI_INTEGER *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
UINT32 Value32;
ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System-IO (width %d) R/W %d Address=%8.8X%8.8X\n",
BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (Address)));
/* Decode the function parameter */
switch (Function)
{
case ACPI_READ:
Status = AcpiOsReadPort ((ACPI_IO_ADDRESS) Address,
&Value32, BitWidth);
*Value = Value32;
break;
case ACPI_WRITE:
Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) Address,
(UINT32) *Value, BitWidth);
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS (Status);
}
static void
acpicpu_cstate_idle_enter(struct acpicpu_softc *sc, int state)
{
struct acpicpu_cstate *cs = &sc->sc_cstate[state];
uint32_t end, start, val;
start = acpitimer_read_fast(NULL);
switch (cs->cs_method) {
case ACPICPU_C_STATE_FFH:
case ACPICPU_C_STATE_HALT:
acpicpu_md_cstate_enter(cs->cs_method, state);
break;
case ACPICPU_C_STATE_SYSIO:
(void)AcpiOsReadPort(cs->cs_addr, &val, 8);
break;
}
cs->cs_evcnt.ev_count++;
end = acpitimer_read_fast(NULL);
sc->sc_cstate_sleep = hztoms(acpitimer_delta(end, start)) * 1000;
}