Overview

The MCUXpresso SDK provides a peripheral driver for the State Save and Restore Controller(SSARC) module of MCUXpresso SDK devices.

The SSARC driver supports the setting of descriptors and groups. For the setting of descriptors, the function SSARC_SetDescriptorConfig() can be used to config the type of descriptors' operation. For the setting of groups, the function SSARC_GroupInit() can be used to config the groups and enable the groups. The function SSARC_GroupDeinit() can be used to disable the groups.

Data Structures
struct	ssarc_descriptor_config_t
	The configuration of descriptor. More...

struct	ssarc_group_config_t
	The configuration of the group. More...

Enumerations
enum	_ssarc_interrupt_status_flags { kSSARC_AddressErrorFlag = SSARC_LP_INT_STATUS_ADDR_ERR_MASK, kSSARC_AHBErrorFlag = SSARC_LP_INT_STATUS_AHB_ERR_MASK, kSSARC_SoftwareRequestDoneFlag = SSARC_LP_INT_STATUS_SW_REQ_DONE_MASK, kSSARC_TimeoutFlag = SSARC_LP_INT_STATUS_TIMEOUT_MASK, kSSARC_GroupConflictFlag = SSARC_LP_INT_STATUS_GROUP_CONFLICT_MASK }
	The enumeration of ssarc status flags. More...

enum	ssarc_descriptor_register_size_t { kSSARC_DescriptorRegister8bitWidth = 0x0U, kSSARC_DescriptorRegister16bitWidth = 0x1U, kSSARC_DescriptorRegister32bitWidth = 0x2U }
	The size of the register to be saved/restored. More...

enum	ssarc_descriptor_operation_t { kSSARC_SaveDisableRestoreDisable = 0x0U, kSSARC_SaveEnableRestoreDisable = SSARC_HP_SRAM2_SV_EN_MASK, kSSARC_SaveDisableRestoreEnable = SSARC_HP_SRAM2_RT_EN_MASK, kSSARC_SaveEnableRestoreEnable = (SSARC_HP_SRAM2_RT_EN_MASK \| SSARC_HP_SRAM2_SV_EN_MASK) }
	The operation of the descriptor. More...

enum	ssarc_descriptor_type_t { kSSARC_ReadValueWriteBack = 0x00U, kSSARC_WriteFixedValue = 0x01U, kSSARC_RMWOr = 0x02U, kSSARC_RMWAnd = 0x03U, kSSARC_DelayCycles = 0x04U, kSSARC_Polling0 = 0x05U, kSSARC_Polling1 = 0x06U }
	The type of operation. More...

enum	ssarc_save_restore_order_t { kSSARC_ProcessFromStartToEnd = 0U, kSSARC_ProcessFromEndToStart = 1U }
	The order of the restore/save operation. More...

enum	ssarc_software_trigger_mode_t { kSSARC_TriggerSaveRequest = SSARC_LP_DESC_CTRL1_SW_TRIG_SV_MASK, kSSARC_TriggerRestoreRequest = SSARC_LP_DESC_CTRL1_SW_TRIG_RT_MASK }
	Software trigger mode. More...

Driver version
#define	FSL_SSARC_DRIVER_VERSION (MAKE_VERSION(2, 0, 1))
	SSARC driver version 2.0.1. More...

Descriptor related APIs.
static uint32_t	SSARC_GetDescriptorRegisterAddress (SSARC_HP_Type *base, uint32_t index)
	Gets the address of the register to be saved/restored. More...

static uint32_t	SSARC_GetDescriptorRegisterData (SSARC_HP_Type *base, uint32_t index)
	Gets the value of the register to be saved/restored. More...

void	SSARC_SetDescriptorConfig (SSARC_HP_Type base, uint32_t index, const ssarc_descriptor_config_t config)
	Sets the configuration of the descriptor. More...

Group Related APIs
void	SSARC_GroupInit (SSARC_LP_Type base, uint8_t groupID, const ssarc_group_config_t config)
	Inits the selected group. More...

static void	SSARC_GroupDeinit (SSARC_LP_Type *base, uint8_t groupID)
	De-inits the selected group. More...

static void	SSARC_LockGroupDomain (SSARC_LP_Type *base, uint8_t groupID)
	Locks the configuration of the domain. More...

static void	SSARC_LockGroupWrite (SSARC_LP_Type *base, uint8_t groupID)
	Locks the write access to the control registers and descriptors for the selected group. More...

static void	SSARC_LockGroupRead (SSARC_LP_Type *base, uint8_t groupID)
	Locks the read access to the control registers and descriptors for the selected group. More...

void	SSARC_TriggerSoftwareRequest (SSARC_LP_Type *base, uint8_t groupID, ssarc_software_trigger_mode_t mode)
	Triggers software request. More...

Global Setting Related APIs
static void	SSARC_ResetWholeBlock (SSARC_LP_Type *base)
	Resets the whole SSARC block by software. More...

static void	SSARC_EnableHardwareRequest (SSARC_LP_Type *base, bool enable)
	Enables/Disables save/restore request from the PGMC module. More...

Status Related APIs
static uint32_t	SSARC_GetStatusFlags (SSARC_LP_Type *base)
	Gets status flags. More...

static void	SSARC_ClearStatusFlags (SSARC_LP_Type *base, uint32_t mask)
	Clears status flags. More...

static uint32_t	SSARC_GetErrorIndex (SSARC_LP_Type *base)
	Gets the error index that indicates which descriptor will trigger the AHB_ERR or ADDR_ERR interrupt. More...

Time Out Related APIs
static void	SSARC_SetTimeoutValue (SSARC_LP_Type *base, uint32_t value)
	Sets timeout value for the entire group to complete. More...

static uint32_t	SSARC_GetTimeoutValue (SSARC_LP_Type *base)
	Gets timeout value for AHB clock. More...

Pending Group Related APIs
static uint16_t	SSARC_GetHardwareRequestRestorePendingGroup (SSARC_LP_Type *base)
	Gets the value that indicates which groups are pending for restore from hardware request. More...

static uint16_t	SSARC_GetHardwareRequestSavePendingGroup (SSARC_LP_Type *base)
	Gets the value that indicates which groups are pending for save from hardware request. More...

static uint16_t	SSARC_GetSoftwareRequestRestorePendingGroup (SSARC_LP_Type *base)
	Gets the value that indicates which groups are pending for restore from software request. More...

static uint16_t	SSARC_GetSoftwareRequestSavePendingGroup (SSARC_LP_Type *base)
	Gets the value that indicates which groups are pending for save from software request. More...

Data Structure Documentation

struct ssarc_descriptor_config_t

Data Fields
uint32_t	address
	The address of the register/memory to be saved/restored. More...

uint32_t	data
	The value of the register/memory to be saved/restored, please note that if the type is selected as kSSARC_ReadValueWriteBack, this data field is useless. More...

ssarc_descriptor_register_size_t	size
	The size of register to be saved/restored. More...

ssarc_descriptor_operation_t	operation
	The operation mode of descriptor. More...

ssarc_descriptor_type_t	type
	The type of operation. More...

Field Documentation

uint32_t ssarc_descriptor_config_t::address

uint32_t ssarc_descriptor_config_t::data

ssarc_descriptor_register_size_t ssarc_descriptor_config_t::size

ssarc_descriptor_operation_t ssarc_descriptor_config_t::operation

ssarc_descriptor_type_t ssarc_descriptor_config_t::type

struct ssarc_group_config_t

Data Fields
ssarc_cpu_domain_name_t	cpuDomain
	CPU domain, define the ownership of this group. More...

uint32_t	startIndex
	The index of the first descriptor of the group. More...

uint32_t	endIndex
	The index of the last descriptor of the group. More...

ssarc_save_restore_order_t	restoreOrder
	The restore order. More...

ssarc_save_restore_order_t	saveOrder
	The save order. More...

uint8_t	restorePriority
	Restore priority of current group. More...

uint8_t	savePriority
	Save priority of current group. More...

ssarc_power_domain_name_t	powerDomain
	Power domain. More...

uint32_t	highestAddress
	Highest address that can be accessed for the descriptors in the group. More...

uint32_t	lowestAddress
	Lowest address that can be accessed for the descriptors in the group. More...

Field Documentation

ssarc_cpu_domain_name_t ssarc_group_config_t::cpuDomain

uint32_t ssarc_group_config_t::startIndex

uint32_t ssarc_group_config_t::endIndex

ssarc_save_restore_order_t ssarc_group_config_t::restoreOrder

ssarc_save_restore_order_t ssarc_group_config_t::saveOrder

uint8_t ssarc_group_config_t::restorePriority

0 is the highest priority, 15 is the lowest priority

uint8_t ssarc_group_config_t::savePriority

0 is the highest priority, 15 is the lowest priority.

ssarc_power_domain_name_t ssarc_group_config_t::powerDomain

uint32_t ssarc_group_config_t::highestAddress

uint32_t ssarc_group_config_t::lowestAddress

Macro Definition Documentation

#define FSL_SSARC_DRIVER_VERSION (MAKE_VERSION(2, 0, 1))

Enumeration Type Documentation

enum _ssarc_interrupt_status_flags

Enumerator
kSSARC_AddressErrorFlag	If the descriptor is not in the range, assert address error.
kSSARC_AHBErrorFlag	If any AHB master access receives none-OKAY, assert AHB error.
kSSARC_SoftwareRequestDoneFlag	If a software triggered save or restore process is completed, assert sofware request done .
kSSARC_TimeoutFlag	If processing of a group has exceeded the timeout value, assert timeout.
kSSARC_GroupConflictFlag	Group conflict.

enum ssarc_descriptor_register_size_t

Enumerator
kSSARC_DescriptorRegister8bitWidth	The register to be saved/restored is 8 bit width.
kSSARC_DescriptorRegister16bitWidth	The register to be saved/restored is 16 bit width.
kSSARC_DescriptorRegister32bitWidth	The register to be saved/restored is 32 bit width.

enum ssarc_descriptor_operation_t

Enumerator
kSSARC_SaveDisableRestoreDisable	Disable Save operation, disable restore operation.
kSSARC_SaveEnableRestoreDisable	Enable Save operation, disable restore operation.
kSSARC_SaveDisableRestoreEnable	Disable Save operation, enable restore operation.
kSSARC_SaveEnableRestoreEnable	Enable Save operation, enable restore operation.

enum ssarc_descriptor_type_t

Enumerator
kSSARC_ReadValueWriteBack	Read the register value on save operation and write it back on restore operation.
kSSARC_WriteFixedValue	Always write a fixed value from DATA[31:0].
kSSARC_RMWOr	Read register, OR with the DATA[31:0], and write it back.
kSSARC_RMWAnd	Read register, AND with the DATA[31:0], and write it back.
kSSARC_DelayCycles	Delay for number of cycles based on the DATA[31:0].
kSSARC_Polling0	Read the register until read_data[31:0] & DATA[31:0] == 0.
kSSARC_Polling1	Read the register until read_data[31:0] & DATA[31:0] != 0.

enum ssarc_save_restore_order_t

Enumerator
kSSARC_ProcessFromStartToEnd	Descriptors within the group are processed from start to end.
kSSARC_ProcessFromEndToStart	Descriptors within the group are processed from end to start.

enum ssarc_software_trigger_mode_t

Enumerator
kSSARC_TriggerSaveRequest	Don't trigger restore operation, trigger the save operation by software.
kSSARC_TriggerRestoreRequest	Trigger the restore operation, don't trigger the save operation.

Function Documentation

static uint32_t SSARC_GetDescriptorRegisterAddress	(	SSARC_HP_Type *	base,
		uint32_t	index
	)

inlinestatic

Parameters

base	SSARC_HP peripheral base address.
index	The index of descriptor. Range from 0 to 1023.

Returns: The address of the register.

static uint32_t SSARC_GetDescriptorRegisterData	(	SSARC_HP_Type *	base,
		uint32_t	index
	)

inlinestatic

Parameters

base	SSARC_HP peripheral base address.
index	The index of descriptor. Range from 0 to 1023.

Returns: The value of the register.

void SSARC_SetDescriptorConfig	(	SSARC_HP_Type *	base,
		uint32_t	index,
		const ssarc_descriptor_config_t *	config
	)

Parameters

base	SSARC_HP peripheral base address.
index	The index of descriptor. Range from 0 to 1023.
config	Pointer to the structure ssarc_descriptor_config_t. Please refer to ssarc_descriptor_config_t for details.

void SSARC_GroupInit	(	SSARC_LP_Type *	base,
		uint8_t	groupID,
		const ssarc_group_config_t *	config
	)

Note: For the groups with the same save priority or restore priority, the save/restore operation runs in the group order.

Parameters

base	SSARC_LP peripheral base address.
groupID	The index of the group. Range from 0 to 15.
config	Pointer to the structure ssarc_group_config_t. Please refer to ssarc_group_config_t for details.

static void SSARC_GroupDeinit	(	SSARC_LP_Type *	base,
		uint8_t	groupID
	)

inlinestatic

Parameters

base	SSARC_LP peripheral base address.
groupID	The index of the group. Range from 0 to 15.

static void SSARC_LockGroupDomain	(	SSARC_LP_Type *	base,
		uint8_t	groupID
	)

inlinestatic

This function locks the configuration of the domain. Once locked, only the access from the same domain is allowed, access from other domains will be blocked. Once locked, it can only be unlocked by a hardware reset.

Parameters

base	SSARC_LP peripheral base address.
groupID	The index of the group. Range from 0 to 15.

static void SSARC_LockGroupWrite	(	SSARC_LP_Type *	base,
		uint8_t	groupID
	)

inlinestatic

This function Locks the write access to the control registers and descriptors for the selected group. All writes are blocked. Once locked, it can only be unlocked by a hardware reset.

Parameters

base	SSARC_LP peripheral base address.
groupID	The index of the group. Range from 0 to 15.

static void SSARC_LockGroupRead	(	SSARC_LP_Type *	base,
		uint8_t	groupID
	)

inlinestatic

This function Locks the read access to the control registers and descriptors for the selected group. All reads are blocked. Once locked, it can only be unlocked by a hardware reset.

Parameters

base	SSARC_LP peripheral base address.
groupID	The index of the group. Range from 0 to 15.

void SSARC_TriggerSoftwareRequest	(	SSARC_LP_Type *	base,
		uint8_t	groupID,
		ssarc_software_trigger_mode_t	mode
	)

Note: Each group allows software to trigger the save/restore operation without getting the request from basic power controller.

Parameters

base	SSARC_LP peripheral base address.
groupID	The index of the group. Range from 0 to 15.
mode	Software trigger mode. Please refer to ssarc_software_trigger_mode_t for details.

static void SSARC_ResetWholeBlock ( SSARC_LP_Type * base )

inlinestatic

Note: Only reset the SSARC registers, not include the DESC in SRAM.

Parameters

base	SSARC_LP peripheral base address.

static void SSARC_EnableHardwareRequest	(	SSARC_LP_Type *	base,
		bool	enable
	)

inlinestatic

Parameters

base	SSARC_LP peripheral base address.
enable	Used to enable/disable save/restore hardware request. true Enable GPC save/restore requests. false Disable GPC save/restore requests.

static uint32_t SSARC_GetStatusFlags ( SSARC_LP_Type * base )

inlinestatic

Parameters

base	SSARC_LP peripheral base address.

Returns: The value of status flags. See _ssarc_interrupt_status_flags for details.

static void SSARC_ClearStatusFlags	(	SSARC_LP_Type *	base,
		uint32_t	mask
	)

inlinestatic

Note: Only kSSARC_AddressErrorFlag, kSSARC_AHBErrorFlag, kSSARC_TimeoutFlag and kSSARC_GroupConflictFlag can be cleared.

Parameters

base	SSARC_LP peripheral base address.
mask	The mask value for flags to be cleared. See _ssarc_interrupt_status_flags for details.

static uint32_t SSARC_GetErrorIndex ( SSARC_LP_Type * base )

inlinestatic

Parameters

base	SSARC_LP peripheral base address.

Returns: The error index.

static void SSARC_SetTimeoutValue	(	SSARC_LP_Type *	base,
		uint32_t	value
	)

inlinestatic

This function sets timeout value for the entire group to complete. Setting timeout value to 0 will disable this feature.

Parameters

base	SSARC_LP peripheral base address.
value	The timeout value, 0 means disable time out feature.

static uint32_t SSARC_GetTimeoutValue ( SSARC_LP_Type * base )

inlinestatic

Parameters

base	SSARC_LP peripheral base address.

Returns: The timeout value.

static uint16_t SSARC_GetHardwareRequestRestorePendingGroup ( SSARC_LP_Type * base )

inlinestatic

Parameters

base	SSARC_LP peripheral base address.

Returns: The value of the pending groups.

static uint16_t SSARC_GetHardwareRequestSavePendingGroup ( SSARC_LP_Type * base )

inlinestatic

Parameters

base	SSARC_LP peripheral base address.

Returns: The value of the pending groups.

static uint16_t SSARC_GetSoftwareRequestRestorePendingGroup ( SSARC_LP_Type * base )

inlinestatic

Parameters

base	SSARC_LP peripheral base address.

Returns: The value of the pending groups.

static uint16_t SSARC_GetSoftwareRequestSavePendingGroup ( SSARC_LP_Type * base )

inlinestatic

Parameters

base	SSARC_LP peripheral base address.

Returns: The value of the pending groups.

Overview

Data Structures

Enumerations

Driver version

Descriptor related APIs.

Group Related APIs

Global Setting Related APIs

Status Related APIs

Time Out Related APIs

Pending Group Related APIs

Data Structure Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation