Exemplo n.º 1
0
ACPI_STATUS
AcpiHwGetGpeStatus (
    ACPI_GPE_EVENT_INFO     *GpeEventInfo,
    ACPI_EVENT_STATUS       *EventStatus)
{
    UINT32                  InByte;
    UINT32                  RegisterBit;
    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
    ACPI_EVENT_STATUS       LocalEventStatus = 0;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_ENTRY ();


    if (!EventStatus)
    {
        return (AE_BAD_PARAMETER);
    }

    /* Get the info block for the entire GPE register */

    GpeRegisterInfo = GpeEventInfo->RegisterInfo;

    /* Get the register bitmask for this GPE */

    RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo);

    /* GPE currently enabled? (enabled for runtime?) */

    if (RegisterBit & GpeRegisterInfo->EnableForRun)
    {
        LocalEventStatus |= ACPI_EVENT_FLAG_ENABLED;
    }

    /* GPE enabled for wake? */

    if (RegisterBit & GpeRegisterInfo->EnableForWake)
    {
        LocalEventStatus |= ACPI_EVENT_FLAG_WAKE_ENABLED;
    }

    /* GPE currently active (status bit == 1)? */

    Status = AcpiHwRead (&InByte, &GpeRegisterInfo->StatusAddress);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    if (RegisterBit & InByte)
    {
        LocalEventStatus |= ACPI_EVENT_FLAG_SET;
    }

    /* Set return value */

    (*EventStatus) = LocalEventStatus;
    return (AE_OK);
}
Exemplo n.º 2
0
ACPI_STATUS
AcpiGetTimer (
    UINT32                  *Ticks)
{
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (AcpiGetTimer);


    if (!Ticks)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    /* ACPI 5.0A: PM Timer is optional */

    if (!AcpiGbl_FADT.XPmTimerBlock.Address)
    {
        return_ACPI_STATUS (AE_SUPPORT);
    }

    Status = AcpiHwRead (Ticks, &AcpiGbl_FADT.XPmTimerBlock);
    return_ACPI_STATUS (Status);
}
Exemplo n.º 3
0
static ACPI_STATUS
AcpiHwReadMultiple (
    UINT32                  *Value,
    ACPI_GENERIC_ADDRESS    *RegisterA,
    ACPI_GENERIC_ADDRESS    *RegisterB)
{
    UINT32                  ValueA = 0;
    UINT32                  ValueB = 0;
    UINT64                  Value64;
    ACPI_STATUS             Status;


    /* The first register is always required */

    Status = AcpiHwRead (&Value64, RegisterA);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }
    ValueA = (UINT32) Value64;

    /* Second register is optional */

    if (RegisterB->Address)
    {
        Status = AcpiHwRead (&Value64, RegisterB);
        if (ACPI_FAILURE (Status))
        {
            return (Status);
        }
        ValueB = (UINT32) Value64;
    }

    /*
     * OR the two return values together. No shifting or masking is necessary,
     * because of how the PM1 registers are defined in the ACPI specification:
     *
     * "Although the bits can be split between the two register blocks (each
     * register block has a unique pointer within the FADT), the bit positions
     * are maintained. The register block with unimplemented bits (that is,
     * those implemented in the other register block) always returns zeros,
     * and writes have no side effects"
     */
    *Value = (ValueA | ValueB);
    return (AE_OK);
}
Exemplo n.º 4
0
ACPI_STATUS
AcpiGetTimer (
    UINT32                  *Ticks)
{
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (AcpiGetTimer);


    if (!Ticks)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    Status = AcpiHwRead (Ticks, &AcpiGbl_FADT.XPmTimerBlock);

    return_ACPI_STATUS (Status);
}
Exemplo n.º 5
0
UINT32
AcpiEvGpeDetect (
    ACPI_GPE_XRUPT_INFO     *GpeXruptList)
{
    ACPI_STATUS             Status;
    ACPI_GPE_BLOCK_INFO     *GpeBlock;
    ACPI_NAMESPACE_NODE     *GpeDevice;
    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
    UINT32                  GpeNumber;
    ACPI_GPE_HANDLER_INFO   *GpeHandlerInfo;
    UINT32                  IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
    UINT8                   EnabledStatusByte;
    UINT32                  StatusReg;
    UINT32                  EnableReg;
    ACPI_CPU_FLAGS          Flags;
    UINT32                  i;
    UINT32                  j;


    ACPI_FUNCTION_NAME (EvGpeDetect);

    /* Check for the case where there are no GPEs */

    if (!GpeXruptList)
    {
        return (IntStatus);
    }

    /*
     * We need to obtain the GPE lock for both the data structs and registers
     * Note: Not necessary to obtain the hardware lock, since the GPE
     * registers are owned by the GpeLock.
     */
    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);

    /* Examine all GPE blocks attached to this interrupt level */

    GpeBlock = GpeXruptList->GpeBlockListHead;
    while (GpeBlock)
    {
        GpeDevice = GpeBlock->Node;

        /*
         * Read all of the 8-bit GPE status and enable registers in this GPE
         * block, saving all of them. Find all currently active GP events.
         */
        for (i = 0; i < GpeBlock->RegisterCount; i++)
        {
            /* Get the next status/enable pair */

            GpeRegisterInfo = &GpeBlock->RegisterInfo[i];

            /*
             * Optimization: If there are no GPEs enabled within this
             * register, we can safely ignore the entire register.
             */
            if (!(GpeRegisterInfo->EnableForRun |
                  GpeRegisterInfo->EnableForWake))
            {
                ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
                    "Ignore disabled registers for GPE %02X-%02X: "
                    "RunEnable=%02X, WakeEnable=%02X\n",
                    GpeRegisterInfo->BaseGpeNumber,
                    GpeRegisterInfo->BaseGpeNumber + (ACPI_GPE_REGISTER_WIDTH - 1),
                    GpeRegisterInfo->EnableForRun,
                    GpeRegisterInfo->EnableForWake));
                continue;
            }

            /* Read the Status Register */

            Status = AcpiHwRead (&StatusReg, &GpeRegisterInfo->StatusAddress);
            if (ACPI_FAILURE (Status))
            {
                goto UnlockAndExit;
            }

            /* Read the Enable Register */

            Status = AcpiHwRead (&EnableReg, &GpeRegisterInfo->EnableAddress);
            if (ACPI_FAILURE (Status))
            {
                goto UnlockAndExit;
            }

            ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
                "Read registers for GPE %02X-%02X: Status=%02X, Enable=%02X, "
                "RunEnable=%02X, WakeEnable=%02X\n",
                GpeRegisterInfo->BaseGpeNumber,
                GpeRegisterInfo->BaseGpeNumber + (ACPI_GPE_REGISTER_WIDTH - 1),
                StatusReg, EnableReg,
                GpeRegisterInfo->EnableForRun,
                GpeRegisterInfo->EnableForWake));

            /* Check if there is anything active at all in this register */

            EnabledStatusByte = (UINT8) (StatusReg & EnableReg);
            if (!EnabledStatusByte)
            {
                /* No active GPEs in this register, move on */

                continue;
            }

            /* Now look at the individual GPEs in this byte register */

            for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
            {
                /* Examine one GPE bit */

                GpeEventInfo = &GpeBlock->EventInfo[((ACPI_SIZE) i *
                    ACPI_GPE_REGISTER_WIDTH) + j];
                GpeNumber = j + GpeRegisterInfo->BaseGpeNumber;

                if (EnabledStatusByte & (1 << j))
                {
                    /* Invoke global event handler if present */

                    AcpiGpeCount++;
                    if (AcpiGbl_GlobalEventHandler)
                    {
                        AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_GPE,
                            GpeDevice, GpeNumber,
                            AcpiGbl_GlobalEventHandlerContext);
                    }

                    /* Found an active GPE */

                    if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
                        ACPI_GPE_DISPATCH_RAW_HANDLER)
                    {
                        /* Dispatch the event to a raw handler */

                        GpeHandlerInfo = GpeEventInfo->Dispatch.Handler;

                        /*
                         * There is no protection around the namespace node
                         * and the GPE handler to ensure a safe destruction
                         * because:
                         * 1. The namespace node is expected to always
                         *    exist after loading a table.
                         * 2. The GPE handler is expected to be flushed by
                         *    AcpiOsWaitEventsComplete() before the
                         *    destruction.
                         */
                        AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
                        IntStatus |= GpeHandlerInfo->Address (
                            GpeDevice, GpeNumber, GpeHandlerInfo->Context);
                        Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
                    }
                    else
                    {
                        /*
                         * Dispatch the event to a standard handler or
                         * method.
                         */
                        IntStatus |= AcpiEvGpeDispatch (GpeDevice,
                            GpeEventInfo, GpeNumber);
                    }
                }
            }
        }

        GpeBlock = GpeBlock->Next;
    }

UnlockAndExit:

    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    return (IntStatus);
}
Exemplo n.º 6
0
ACPI_STATUS
AcpiHwLowSetGpe (
    ACPI_GPE_EVENT_INFO     *GpeEventInfo,
    UINT32                  Action)
{
    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
    ACPI_STATUS             Status;
    UINT32                  EnableMask;
    UINT32                  RegisterBit;


    ACPI_FUNCTION_ENTRY ();


    /* Get the info block for the entire GPE register */

    GpeRegisterInfo = GpeEventInfo->RegisterInfo;
    if (!GpeRegisterInfo)
    {
        return (AE_NOT_EXIST);
    }

    /* Get current value of the enable register that contains this GPE */

    Status = AcpiHwRead (&EnableMask, &GpeRegisterInfo->EnableAddress);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    /* Set or clear just the bit that corresponds to this GPE */

    RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo);
    switch (Action)
    {
    case ACPI_GPE_CONDITIONAL_ENABLE:

        /* Only enable if the EnableForRun bit is set */

        if (!(RegisterBit & GpeRegisterInfo->EnableForRun))
        {
            return (AE_BAD_PARAMETER);
        }

        /*lint -fallthrough */

    case ACPI_GPE_ENABLE:
        ACPI_SET_BIT (EnableMask, RegisterBit);
        break;

    case ACPI_GPE_DISABLE:
        ACPI_CLEAR_BIT (EnableMask, RegisterBit);
        break;

    default:
        ACPI_ERROR ((AE_INFO, "Invalid GPE Action, %u\n", Action));
        return (AE_BAD_PARAMETER);
    }

    /* Write the updated enable mask */

    Status = AcpiHwWrite (EnableMask, &GpeRegisterInfo->EnableAddress);
    return (Status);
}
Exemplo n.º 7
0
ACPI_STATUS
AcpiHwRegisterWrite (
    UINT32                  RegisterId,
    UINT32                  Value)
{
    ACPI_STATUS             Status;
    UINT32                  ReadValue;


    ACPI_FUNCTION_TRACE (HwRegisterWrite);


    switch (RegisterId)
    {
    case ACPI_REGISTER_PM1_STATUS:           /* PM1 A/B: 16-bit access each */
        /*
         * Handle the "ignored" bit in PM1 Status. According to the ACPI
         * specification, ignored bits are to be preserved when writing.
         * Normally, this would mean a read/modify/write sequence. However,
         * preserving a bit in the status register is different. Writing a
         * one clears the status, and writing a zero preserves the status.
         * Therefore, we must always write zero to the ignored bit.
         *
         * This behavior is clarified in the ACPI 4.0 specification.
         */
        Value &= ~ACPI_PM1_STATUS_PRESERVED_BITS;

        Status = AcpiHwWriteMultiple (Value,
                    &AcpiGbl_XPm1aStatus,
                    &AcpiGbl_XPm1bStatus);
        break;

    case ACPI_REGISTER_PM1_ENABLE:           /* PM1 A/B: 16-bit access each */

        Status = AcpiHwWriteMultiple (Value,
                    &AcpiGbl_XPm1aEnable,
                    &AcpiGbl_XPm1bEnable);
        break;

    case ACPI_REGISTER_PM1_CONTROL:          /* PM1 A/B: 16-bit access each */
        /*
         * Perform a read first to preserve certain bits (per ACPI spec)
         * Note: This includes SCI_EN, we never want to change this bit
         */
        Status = AcpiHwReadMultiple (&ReadValue,
                    &AcpiGbl_FADT.XPm1aControlBlock,
                    &AcpiGbl_FADT.XPm1bControlBlock);
        if (ACPI_FAILURE (Status))
        {
            goto Exit;
        }

        /* Insert the bits to be preserved */

        ACPI_INSERT_BITS (Value, ACPI_PM1_CONTROL_PRESERVED_BITS, ReadValue);

        /* Now we can write the data */

        Status = AcpiHwWriteMultiple (Value,
                    &AcpiGbl_FADT.XPm1aControlBlock,
                    &AcpiGbl_FADT.XPm1bControlBlock);
        break;

    case ACPI_REGISTER_PM2_CONTROL:          /* 8-bit access */
        /*
         * For control registers, all reserved bits must be preserved,
         * as per the ACPI spec.
         */
        Status = AcpiHwRead (&ReadValue, &AcpiGbl_FADT.XPm2ControlBlock);
        if (ACPI_FAILURE (Status))
        {
            goto Exit;
        }

        /* Insert the bits to be preserved */

        ACPI_INSERT_BITS (Value, ACPI_PM2_CONTROL_PRESERVED_BITS, ReadValue);

        Status = AcpiHwWrite (Value, &AcpiGbl_FADT.XPm2ControlBlock);
        break;

    case ACPI_REGISTER_PM_TIMER:             /* 32-bit access */

        Status = AcpiHwWrite (Value, &AcpiGbl_FADT.XPmTimerBlock);
        break;

    case ACPI_REGISTER_SMI_COMMAND_BLOCK:    /* 8-bit access */

        /* SMI_CMD is currently always in IO space */

        Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, Value, 8);
        break;

    default:

        ACPI_ERROR ((AE_INFO, "Unknown Register ID: 0x%X",
            RegisterId));
        Status = AE_BAD_PARAMETER;
        break;
    }

Exit:
    return_ACPI_STATUS (Status);
}
Exemplo n.º 8
0
ACPI_STATUS
AcpiHwRegisterRead (
    UINT32                  RegisterId,
    UINT32                  *ReturnValue)
{
    UINT32                  Value = 0;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (HwRegisterRead);


    switch (RegisterId)
    {
    case ACPI_REGISTER_PM1_STATUS:           /* PM1 A/B: 16-bit access each */

        Status = AcpiHwReadMultiple (&Value,
                    &AcpiGbl_XPm1aStatus,
                    &AcpiGbl_XPm1bStatus);
        break;

    case ACPI_REGISTER_PM1_ENABLE:           /* PM1 A/B: 16-bit access each */

        Status = AcpiHwReadMultiple (&Value,
                    &AcpiGbl_XPm1aEnable,
                    &AcpiGbl_XPm1bEnable);
        break;

    case ACPI_REGISTER_PM1_CONTROL:          /* PM1 A/B: 16-bit access each */

        Status = AcpiHwReadMultiple (&Value,
                    &AcpiGbl_FADT.XPm1aControlBlock,
                    &AcpiGbl_FADT.XPm1bControlBlock);

        /*
         * Zero the write-only bits. From the ACPI specification, "Hardware
         * Write-Only Bits": "Upon reads to registers with write-only bits,
         * software masks out all write-only bits."
         */
        Value &= ~ACPI_PM1_CONTROL_WRITEONLY_BITS;
        break;

    case ACPI_REGISTER_PM2_CONTROL:          /* 8-bit access */

        Status = AcpiHwRead (&Value, &AcpiGbl_FADT.XPm2ControlBlock);
        break;

    case ACPI_REGISTER_PM_TIMER:             /* 32-bit access */

        Status = AcpiHwRead (&Value, &AcpiGbl_FADT.XPmTimerBlock);
        break;

    case ACPI_REGISTER_SMI_COMMAND_BLOCK:    /* 8-bit access */

        Status = AcpiHwReadPort (AcpiGbl_FADT.SmiCommand, &Value, 8);
        break;

    default:

        ACPI_ERROR ((AE_INFO, "Unknown Register ID: 0x%X",
            RegisterId));
        Status = AE_BAD_PARAMETER;
        break;
    }

    if (ACPI_SUCCESS (Status))
    {
        *ReturnValue = Value;
    }

    return_ACPI_STATUS (Status);
}
Exemplo n.º 9
0
UINT32
AcpiEvGpeDetect (
    ACPI_GPE_XRUPT_INFO     *GpeXruptList)
{
    ACPI_STATUS             Status;
    ACPI_GPE_BLOCK_INFO     *GpeBlock;
    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
    UINT32                  IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
    UINT8                   EnabledStatusByte;
    UINT32                  StatusReg;
    UINT32                  EnableReg;
    ACPI_CPU_FLAGS          Flags;
    UINT32                  i;
    UINT32                  j;


    ACPI_FUNCTION_NAME (EvGpeDetect);

    /* Check for the case where there are no GPEs */

    if (!GpeXruptList)
    {
        return (IntStatus);
    }

    /*
     * We need to obtain the GPE lock for both the data structs and registers
     * Note: Not necessary to obtain the hardware lock, since the GPE
     * registers are owned by the GpeLock.
     */
    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);

    /* Examine all GPE blocks attached to this interrupt level */

    GpeBlock = GpeXruptList->GpeBlockListHead;
    while (GpeBlock)
    {
        /*
         * Read all of the 8-bit GPE status and enable registers in this GPE
         * block, saving all of them. Find all currently active GP events.
         */
        for (i = 0; i < GpeBlock->RegisterCount; i++)
        {
            /* Get the next status/enable pair */

            GpeRegisterInfo = &GpeBlock->RegisterInfo[i];

            /*
             * Optimization: If there are no GPEs enabled within this
             * register, we can safely ignore the entire register.
             */
            if (!(GpeRegisterInfo->EnableForRun |
                  GpeRegisterInfo->EnableForWake))
            {
                ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
                    "Ignore disabled registers for GPE %02X-%02X: "
                    "RunEnable=%02X, WakeEnable=%02X\n",
                    GpeRegisterInfo->BaseGpeNumber,
                    GpeRegisterInfo->BaseGpeNumber + (ACPI_GPE_REGISTER_WIDTH - 1),
                    GpeRegisterInfo->EnableForRun,
                    GpeRegisterInfo->EnableForWake));
                continue;
            }

            /* Read the Status Register */

            Status = AcpiHwRead (&StatusReg, &GpeRegisterInfo->StatusAddress);
            if (ACPI_FAILURE (Status))
            {
                goto UnlockAndExit;
            }

            /* Read the Enable Register */

            Status = AcpiHwRead (&EnableReg, &GpeRegisterInfo->EnableAddress);
            if (ACPI_FAILURE (Status))
            {
                goto UnlockAndExit;
            }

            ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
                "Read registers for GPE %02X-%02X: Status=%02X, Enable=%02X, "
                "RunEnable=%02X, WakeEnable=%02X\n",
                GpeRegisterInfo->BaseGpeNumber,
                GpeRegisterInfo->BaseGpeNumber + (ACPI_GPE_REGISTER_WIDTH - 1),
                StatusReg, EnableReg,
                GpeRegisterInfo->EnableForRun,
                GpeRegisterInfo->EnableForWake));

            /* Check if there is anything active at all in this register */

            EnabledStatusByte = (UINT8) (StatusReg & EnableReg);
            if (!EnabledStatusByte)
            {
                /* No active GPEs in this register, move on */

                continue;
            }

            /* Now look at the individual GPEs in this byte register */

            for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
            {
                /* Examine one GPE bit */

                if (EnabledStatusByte & (1 << j))
                {
                    /*
                     * Found an active GPE. Dispatch the event to a handler
                     * or method.
                     */
                    IntStatus |= AcpiEvGpeDispatch (GpeBlock->Node,
                        &GpeBlock->EventInfo[((ACPI_SIZE) i *
                            ACPI_GPE_REGISTER_WIDTH) + j],
                        j + GpeRegisterInfo->BaseGpeNumber);
                }
            }
        }

        GpeBlock = GpeBlock->Next;
    }

UnlockAndExit:

    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    return (IntStatus);
}