ACPI_STATUS
AcpiDisable (
void)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (AcpiDisable);
if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"System is already in legacy (non-ACPI) mode\n"));
}
else
{
/* Transition to LEGACY mode */
Status = AcpiHwSetMode (ACPI_SYS_MODE_LEGACY);
if (ACPI_FAILURE (Status))
{
ACPI_ERROR ((AE_INFO,
"Could not exit ACPI mode to legacy mode"));
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n"));
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiDisable (void)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE ("AcpiDisable");
if (!AcpiGbl_FADT)
{
ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in legacy (non-ACPI) mode\n"));
}
else
{
/* Transition to LEGACY mode */
Status = AcpiHwSetMode (ACPI_SYS_MODE_LEGACY);
if (ACPI_FAILURE (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not exit ACPI mode to legacy mode"));
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n"));
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiEnable (
void)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (AcpiEnable);
/* ACPI tables must be present */
if (AcpiGbl_FadtIndex == ACPI_INVALID_TABLE_INDEX)
{
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/* If the Hardware Reduced flag is set, machine is always in acpi mode */
if (AcpiGbl_ReducedHardware)
{
return_ACPI_STATUS (AE_OK);
}
/* Check current mode */
if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"System is already in ACPI mode\n"));
}
else
{
/* Transition to ACPI mode */
Status = AcpiHwSetMode (ACPI_SYS_MODE_ACPI);
if (ACPI_FAILURE (Status))
{
ACPI_ERROR ((AE_INFO, "Could not transition to ACPI mode"));
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"Transition to ACPI mode successful\n"));
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiDisable (
void)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (AcpiDisable);
/* If the Hardware Reduced flag is set, machine is always in acpi mode */
if (AcpiGbl_ReducedHardware)
{
return_ACPI_STATUS (AE_OK);
}
if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"System is already in legacy (non-ACPI) mode\n"));
}
else
{
/* Transition to LEGACY mode */
Status = AcpiHwSetMode (ACPI_SYS_MODE_LEGACY);
if (ACPI_FAILURE (Status))
{
ACPI_ERROR ((AE_INFO,
"Could not exit ACPI mode to legacy mode"));
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"ACPI mode disabled\n"));
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiEnable (
void)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (AcpiEnable);
/* ACPI tables must be present */
if (!AcpiTbTablesLoaded ())
{
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/* Check current mode */
if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
}
else
{
/* Transition to ACPI mode */
Status = AcpiHwSetMode (ACPI_SYS_MODE_ACPI);
if (ACPI_FAILURE (Status))
{
ACPI_ERROR ((AE_INFO, "Could not transition to ACPI mode"));
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"Transition to ACPI mode successful\n"));
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiEnable (void)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE ("AcpiEnable");
/* Make sure we have the FADT*/
if (!AcpiGbl_FADT)
{
ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
}
else
{
/* Transition to ACPI mode */
Status = AcpiHwSetMode (ACPI_SYS_MODE_ACPI);
if (ACPI_FAILURE (Status))
{
ACPI_REPORT_ERROR (("Could not transition to ACPI mode.\n"));
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Transition to ACPI mode successful\n"));
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiHwSetMode (
UINT32 Mode)
{
ACPI_STATUS Status;
UINT32 Retry;
ACPI_FUNCTION_TRACE (HwSetMode);
/* If the Hardware Reduced flag is set, machine is always in acpi mode */
if (AcpiGbl_ReducedHardware)
{
return_ACPI_STATUS (AE_OK);
}
/*
* ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
* system does not support mode transition.
*/
if (!AcpiGbl_FADT.SmiCommand)
{
ACPI_ERROR ((AE_INFO, "No SMI_CMD in FADT, mode transition failed"));
return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
}
/*
* ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE
* in FADT: If it is zero, enabling or disabling is not supported.
* As old systems may have used zero for mode transition,
* we make sure both the numbers are zero to determine these
* transitions are not supported.
*/
if (!AcpiGbl_FADT.AcpiEnable && !AcpiGbl_FADT.AcpiDisable)
{
ACPI_ERROR ((AE_INFO,
"No ACPI mode transition supported in this system "
"(enable/disable both zero)"));
return_ACPI_STATUS (AE_OK);
}
switch (Mode)
{
case ACPI_SYS_MODE_ACPI:
/* BIOS should have disabled ALL fixed and GP events */
Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
(UINT32) AcpiGbl_FADT.AcpiEnable, 8);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n"));
break;
case ACPI_SYS_MODE_LEGACY:
/*
* BIOS should clear all fixed status bits and restore fixed event
* enable bits to default
*/
Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
(UINT32) AcpiGbl_FADT.AcpiDisable, 8);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Attempting to enable Legacy (non-ACPI) mode\n"));
break;
default:
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not write ACPI mode change"));
return_ACPI_STATUS (Status);
}
/*
* Some hardware takes a LONG time to switch modes. Give them 3 sec to
* do so, but allow faster systems to proceed more quickly.
*/
Retry = 3000;
while (Retry)
{
if (AcpiHwGetMode () == Mode)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Mode %X successfully enabled\n", Mode));
return_ACPI_STATUS (AE_OK);
}
AcpiOsStall (ACPI_USEC_PER_MSEC);
Retry--;
}
ACPI_ERROR ((AE_INFO, "Hardware did not change modes"));
return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
}
ACPI_STATUS
AcpiEnableSubsystem (
UINT32 Flags)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (AcpiEnableSubsystem);
#if (!ACPI_REDUCED_HARDWARE)
/* Enable ACPI mode */
if (!(Flags & ACPI_NO_ACPI_ENABLE))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n"));
AcpiGbl_OriginalMode = AcpiHwGetMode();
Status = AcpiEnable ();
if (ACPI_FAILURE (Status))
{
ACPI_WARNING ((AE_INFO, "AcpiEnable failed"));
return_ACPI_STATUS (Status);
}
}
/*
* Obtain a permanent mapping for the FACS. This is required for the
* Global Lock and the Firmware Waking Vector
*/
Status = AcpiTbInitializeFacs ();
if (ACPI_FAILURE (Status))
{
ACPI_WARNING ((AE_INFO, "Could not map the FACS table"));
return_ACPI_STATUS (Status);
}
#endif /* !ACPI_REDUCED_HARDWARE */
/*
* Install the default OpRegion handlers. These are installed unless
* other handlers have already been installed via the
* InstallAddressSpaceHandler interface.
*/
if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Installing default address space handlers\n"));
Status = AcpiEvInstallRegionHandlers ();
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
#if (!ACPI_REDUCED_HARDWARE)
/*
* Initialize ACPI Event handling (Fixed and General Purpose)
*
* Note1: We must have the hardware and events initialized before we can
* execute any control methods safely. Any control method can require
* ACPI hardware support, so the hardware must be fully initialized before
* any method execution!
*
* Note2: Fixed events are initialized and enabled here. GPEs are
* initialized, but cannot be enabled until after the hardware is
* completely initialized (SCI and GlobalLock activated) and the various
* initialization control methods are run (_REG, _STA, _INI) on the
* entire namespace.
*/
if (!(Flags & ACPI_NO_EVENT_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Initializing ACPI events\n"));
Status = AcpiEvInitializeEvents ();
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/*
* Install the SCI handler and Global Lock handler. This completes the
* hardware initialization.
*/
if (!(Flags & ACPI_NO_HANDLER_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Installing SCI/GL handlers\n"));
Status = AcpiEvInstallXruptHandlers ();
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
#endif /* !ACPI_REDUCED_HARDWARE */
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiEnableSubsystem (
UINT32 Flags)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (AcpiEnableSubsystem);
/*
* The early initialization phase is complete. The namespace is loaded,
* and we can now support address spaces other than Memory, I/O, and
* PCI_Config.
*/
AcpiGbl_EarlyInitialization = FALSE;
/*
* Install the default operation region handlers. These are the
* handlers that are defined by the ACPI specification to be
* "always accessible" -- namely, SystemMemory, SystemIO, and
* PCI_Config. This also means that no _REG methods need to be
* run for these address spaces. We need to have these handlers
* installed before any AML code can be executed, especially any
* module-level code (11/2015).
*/
if (!AcpiGbl_GroupModuleLevelCode)
{
Status = AcpiEvInstallRegionHandlers ();
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status, "During Region initialization"));
return_ACPI_STATUS (Status);
}
}
#if (!ACPI_REDUCED_HARDWARE)
/* Enable ACPI mode */
if (!(Flags & ACPI_NO_ACPI_ENABLE))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n"));
AcpiGbl_OriginalMode = AcpiHwGetMode();
Status = AcpiEnable ();
if (ACPI_FAILURE (Status))
{
ACPI_WARNING ((AE_INFO, "AcpiEnable failed"));
return_ACPI_STATUS (Status);
}
}
/*
* Obtain a permanent mapping for the FACS. This is required for the
* Global Lock and the Firmware Waking Vector
*/
if (!(Flags & ACPI_NO_FACS_INIT))
{
Status = AcpiTbInitializeFacs ();
if (ACPI_FAILURE (Status))
{
ACPI_WARNING ((AE_INFO, "Could not map the FACS table"));
return_ACPI_STATUS (Status);
}
}
/*
* Initialize ACPI Event handling (Fixed and General Purpose)
*
* Note1: We must have the hardware and events initialized before we can
* execute any control methods safely. Any control method can require
* ACPI hardware support, so the hardware must be fully initialized before
* any method execution!
*
* Note2: Fixed events are initialized and enabled here. GPEs are
* initialized, but cannot be enabled until after the hardware is
* completely initialized (SCI and GlobalLock activated) and the various
* initialization control methods are run (_REG, _STA, _INI) on the
* entire namespace.
*/
if (!(Flags & ACPI_NO_EVENT_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Initializing ACPI events\n"));
Status = AcpiEvInitializeEvents ();
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/*
* Install the SCI handler and Global Lock handler. This completes the
* hardware initialization.
*/
if (!(Flags & ACPI_NO_HANDLER_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Installing SCI/GL handlers\n"));
Status = AcpiEvInstallXruptHandlers ();
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
#endif /* !ACPI_REDUCED_HARDWARE */
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiEnableSubsystem (
UINT32 Flags)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (AcpiEnableSubsystem);
/* Enable ACPI mode */
if (!(Flags & ACPI_NO_ACPI_ENABLE))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n"));
AcpiGbl_OriginalMode = AcpiHwGetMode();
Status = AcpiEnable ();
if (ACPI_FAILURE (Status))
{
ACPI_WARNING ((AE_INFO, "AcpiEnable failed"));
return_ACPI_STATUS (Status);
}
}
/*
* Install the default OpRegion handlers. These are installed unless
* other handlers have already been installed via the
* InstallAddressSpaceHandler interface.
*/
if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Installing default address space handlers\n"));
Status = AcpiEvInstallRegionHandlers ();
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/*
* Initialize ACPI Event handling (Fixed and General Purpose)
*
* Note1: We must have the hardware and events initialized before we can
* execute any control methods safely. Any control method can require
* ACPI hardware support, so the hardware must be fully initialized before
* any method execution!
*
* Note2: Fixed events are initialized and enabled here. GPEs are
* initialized, but cannot be enabled until after the hardware is
* completely initialized (SCI and GlobalLock activated)
*/
if (!(Flags & ACPI_NO_EVENT_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Initializing ACPI events\n"));
Status = AcpiEvInitializeEvents ();
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/*
* Install the SCI handler and Global Lock handler. This completes the
* hardware initialization.
*/
if (!(Flags & ACPI_NO_HANDLER_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Installing SCI/GL handlers\n"));
Status = AcpiEvInstallXruptHandlers ();
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/*
* Complete the GPE initialization for the GPE blocks defined in the FADT
* (GPE block 0 and 1).
*
* Note1: This is where the _PRW methods are executed for the GPEs. These
* methods can only be executed after the SCI and Global Lock handlers are
* installed and initialized.
*
* Note2: Currently, there seems to be no need to run the _REG methods
* before execution of the _PRW methods and enabling of the GPEs.
*/
if (!(Flags & ACPI_NO_EVENT_INIT))
{
Status = AcpiEvInstallFadtGpes ();
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
return_ACPI_STATUS (Status);
}
