Macros
#define	XCSUDMA_WORD_SIZE (4U)
	Transfer size conversion to bytes for Versal Net. More...

#define	XCSUDMA_H_
	Prevent circular inclusions by using protection macros. More...

#define	XCSUDMA_HW_H_
	Prevent circular inclusions by using protection macros. More...

#define	XCsuDma_In32 Xil_In32
	Input operation. More...

#define	XCsuDma_Out32 Xil_Out32
	Output operation. More...

#define	XCsuDma_ReadReg(BaseAddress, RegOffset) XCsuDma_In32((BaseAddress) + (u32)(RegOffset))
	This macro reads the given register. More...

#define	XCsuDma_WriteReg(BaseAddress, RegOffset, Data) XCsuDma_Out32((BaseAddress) + (u32)(RegOffset), (u32)(Data))
	This macro writes the value into the given register. More...

Enumerations
enum	XCsuDma_Channel { XCSUDMA_SRC_CHANNEL = 0U, XCSUDMA_DST_CHANNEL }
	This typedef contains CSU_DMA Channel Types. More...

Functions
s32	XCsuDma_CfgInitialize (XCsuDma InstancePtr, XCsuDma_Config CfgPtr, UINTPTR EffectiveAddr)
	This function initializes CSU_DMA core. More...

void	XCsuDma_Transfer (XCsuDma *InstancePtr, XCsuDma_Channel Channel, u64 Addr, u32 Size, u8 EnDataLast)
	This function sets the starting address and size of the data to be transferred from/to the memory through the AXI interface. More...

void	XCsuDma_64BitTransfer (XCsuDma *InstancePtr, XCsuDma_Channel Channel, u32 AddrLow, u32 AddrHigh, u32 Size, u8 EnDataLast)
	This function sets the starting address and size of the data to be transferred from/to the memory through the AXI interface. More...

u64	XCsuDma_GetAddr (XCsuDma *InstancePtr, XCsuDma_Channel Channel)
	This function returns the current address location of the memory, from where it has to read the data(SRC) or the location where it has to write the data (DST) based on the channel selection. More...

u32	XCsuDma_GetSize (XCsuDma *InstancePtr, XCsuDma_Channel Channel)
	This function returns the size of the data yet to be transferred from memory to CSU_DMA or CSU_DMA to memory based on the channel selection. More...

void	XCsuDma_Pause (XCsuDma *InstancePtr, XCsuDma_Channel Channel, XCsuDma_PauseType Type)
	This function pauses the Channel data transfer to/from memory or to/from stream based on pause type. More...

s32	XCsuDma_IsPaused (XCsuDma *InstancePtr, XCsuDma_Channel Channel, XCsuDma_PauseType Type)
	This function checks whether Channel memory/stream is paused based on the given pause type. More...

void	XCsuDma_Resume (XCsuDma *InstancePtr, XCsuDma_Channel Channel, XCsuDma_PauseType Type)
	This function resumes the channel if it is in paused state and continues where it has left. More...

u32	XCsuDma_GetCheckSum (XCsuDma *InstancePtr)
	This function returns the sum of all the data read from AXI memory. More...

void	XCsuDma_ClearCheckSum (XCsuDma *InstancePtr)
	This function clears the check sum of the data read from AXI memory. More...

u32	XCsuDma_WaitForDoneTimeout (XCsuDma *InstancePtr, XCsuDma_Channel Channel)
	This function polls for completion of data transfer periodically until the DMA done bit set or until the timeout occurs. More...

void	XCsuDma_SetConfig (XCsuDma InstancePtr, XCsuDma_Channel Channel, XCsuDma_Configure ConfigurValues)
	This function configures all the values of CSU_DMA Channels with the values of updated XCsuDma_Configure structure. More...

void	XCsuDma_GetConfig (XCsuDma InstancePtr, XCsuDma_Channel Channel, XCsuDma_Configure ConfigurValues)
	This function updates XCsuDma_Configure structure members with the configured values of CSU_DMA's Channel. More...

u32	XCsuDma_IntrGetStatus (XCsuDma *InstancePtr, XCsuDma_Channel Channel)
	This function returns interrupt status read from Interrupt Status Register. More...

void	XCsuDma_IntrClear (XCsuDma *InstancePtr, XCsuDma_Channel Channel, u32 Mask)
	This function clears interrupt(s). More...

void	XCsuDma_EnableIntr (XCsuDma *InstancePtr, XCsuDma_Channel Channel, u32 Mask)
	This function enables the interrupt(s). More...

void	XCsuDma_DisableIntr (XCsuDma *InstancePtr, XCsuDma_Channel Channel, u32 Mask)
	This function disables the interrupt(s). More...

u32	XCsuDma_GetIntrMask (XCsuDma *InstancePtr, XCsuDma_Channel Channel)
	This function returns the interrupt mask to know which interrupts are enabled and which of them were disaled. More...

s32	XCsuDma_SelfTest (XCsuDma *InstancePtr)
	This function runs a self-test on the driver and hardware device. More...

XCsuDma_Config *	XCsuDma_LookupConfig (u16 DeviceId)
	XCsuDma_LookupConfig returns a reference to an XCsuDma_Config structure based on the unique device id, DeviceId. More...

Registers offsets
#define	XCSUDMA_ADDR_OFFSET 0x000U
	Address Register Offset. More...

#define	XCSUDMA_SIZE_OFFSET 0x004U
	Size Register Offset. More...

#define	XCSUDMA_STS_OFFSET 0x008U
	Status Register Offset. More...

#define	XCSUDMA_CTRL_OFFSET 0x00CU
	Control Register Offset. More...

#define	XCSUDMA_I_STS_OFFSET 0x014U
	Interrupt Status Register Offset. More...

Size register bit masks and shifts
#define	XCSUDMA_SIZE_MASK 0x1FFFFFFCU
	Mask for size. More...

#define	XCSUDMA_LAST_WORD_MASK 0x00000001U
	Last word check bit mask. More...

#define	XCSUDMA_SIZE_SHIFT 2U
	Shift for size. More...

Interrupt Enable/Disable/Mask/Status registers bit masks
#define	XCSUDMA_IXR_FIFO_OVERFLOW_MASK 0x00000001U
	FIFO overflow mask, it is valid only to Destination Channel. More...

#define	XCSUDMA_IXR_INVALID_APB_MASK 0x00000040U
	Invalid APB access mask. More...

#define	XCSUDMA_IXR_FIFO_THRESHHIT_MASK 0x00000020U
	FIFO threshold hit indicator mask. More...

#define	XCSUDMA_IXR_TIMEOUT_MEM_MASK 0x00000010U
	Time out counter expired to access memory mask. More...

#define	XCSUDMA_IXR_TIMEOUT_STRM_MASK 0x00000008U
	Time out counter expired to access stream mask. More...

#define	XCSUDMA_IXR_AXI_WRERR_MASK 0x00000004U
	AXI Read/Write error mask. More...

#define	XCSUDMA_IXR_DONE_MASK 0x00000002U
	Done mask. More...

#define	XCSUDMA_IXR_MEM_DONE_MASK 0x00000001U
	Memory done mask, it is valid only for source channel. More...

#define	XCSUDMA_IXR_SRC_MASK 0x0000007FU
	((XCSUDMA_IXR_INVALID_APB_MASK)\| (XCSUDMA_IXR_FIFO_THRESHHIT_MASK) \| (XCSUDMA_IXR_TIMEOUT_MEM_MASK) \| (XCSUDMA_IXR_TIMEOUT_STRM_MASK) \| (XCSUDMA_IXR_AXI_WRERR_MASK) \| (XCSUDMA_IXR_DONE_MASK) \| (XCSUDMA_IXR_MEM_DONE_MASK)) More...

#define	XCSUDMA_IXR_DST_MASK 0x000000FEU
	((XCSUDMA_IXR_FIFO_OVERFLOW_MASK) \| (XCSUDMA_IXR_INVALID_APB_MASK) \| (XCSUDMA_IXR_FIFO_THRESHHIT_MASK) \| (XCSUDMA_IXR_TIMEOUT_MEM_MASK) \| (XCSUDMA_IXR_TIMEOUT_STRM_MASK) \| (XCSUDMA_IXR_AXI_WRERR_MASK) \| (XCSUDMA_IXR_DONE_MASK)) More...

Software done timeout value
#define	XCSUDMA_DONE_TIMEOUT_VAL 300000000U
	SW timeout loop value for transfer completion. More...

Macro Definition Documentation

#define XCSUDMA_ADDR_OFFSET 0x000U

Address Register Offset.

Referenced by XCsuDma_64BitTransfer(), XCsuDma_GetAddr(), and XCsuDma_Transfer().

#define XCSUDMA_CTRL_OFFSET 0x00CU

Control Register Offset.

Referenced by XCsuDma_GetConfig(), XCsuDma_IsPaused(), XCsuDma_Pause(), XCsuDma_Resume(), XCsuDma_SelfTest(), and XCsuDma_SetConfig().

#define XCSUDMA_DONE_TIMEOUT_VAL 300000000U

SW timeout loop value for transfer completion.

Referenced by XCsuDma_WaitForDoneTimeout().

#define XCSUDMA_H_

Prevent circular inclusions by using protection macros.

#define XCSUDMA_HW_H_

Prevent circular inclusions by using protection macros.

#define XCSUDMA_I_STS_OFFSET 0x014U

Interrupt Status Register Offset.

Referenced by XCsuDma_IntrClear(), XCsuDma_IntrGetStatus(), and XCsuDma_WaitForDoneTimeout().

#define XCsuDma_In32 Xil_In32

Input operation.

#define XCSUDMA_IXR_AXI_WRERR_MASK 0x00000004U

AXI Read/Write error mask.

#define XCSUDMA_IXR_DONE_MASK 0x00000002U

Done mask.

Referenced by XCsuDma_IntrExample(), XCsuDma_PolledExample(), and XCsuDma_WaitForDoneTimeout().

#define XCSUDMA_IXR_DST_MASK 0x000000FEU

 ((XCSUDMA_IXR_FIFO_OVERFLOW_MASK) |

All interrupt mask for destination

Referenced by XCsuDma_DisableIntr(), XCsuDma_EnableIntr(), and XCsuDma_IntrClear().

#define XCSUDMA_IXR_FIFO_OVERFLOW_MASK 0x00000001U

FIFO overflow mask, it is valid only to Destination Channel.

#define XCSUDMA_IXR_FIFO_THRESHHIT_MASK 0x00000020U

FIFO threshold hit indicator mask.

#define XCSUDMA_IXR_INVALID_APB_MASK 0x00000040U

Invalid APB access mask.

#define XCSUDMA_IXR_MEM_DONE_MASK 0x00000001U

Memory done mask, it is valid only for source channel.

#define XCSUDMA_IXR_SRC_MASK 0x0000007FU

 ((XCSUDMA_IXR_INVALID_APB_MASK)|

All interrupt mask for source

Referenced by XCsuDma_DisableIntr(), XCsuDma_EnableIntr(), and XCsuDma_IntrClear().

#define XCSUDMA_IXR_TIMEOUT_MEM_MASK 0x00000010U

Time out counter expired to access memory mask.

#define XCSUDMA_IXR_TIMEOUT_STRM_MASK 0x00000008U

Time out counter expired to access stream mask.

#define XCSUDMA_LAST_WORD_MASK 0x00000001U

Last word check bit mask.

Referenced by XCsuDma_64BitTransfer(), and XCsuDma_Transfer().

#define XCsuDma_Out32 Xil_Out32

Output operation.

#define XCsuDma_ReadReg	(	BaseAddress,
		RegOffset
	)	XCsuDma_In32((BaseAddress) + (u32)(RegOffset))

This macro reads the given register.

Parameters

BaseAddress	Base address of the CSU_DMA core.
RegOffset	Register offset of the register.

Returns: The 32-bit value of the register.

Note: C-style signature: u32 XCsuDma_ReadReg(u32 BaseAddress, u32 RegOffset)

Referenced by XCsuDma_GetAddr(), XCsuDma_GetCheckSum(), XCsuDma_GetConfig(), XCsuDma_GetIntrMask(), XCsuDma_GetSize(), XCsuDma_IntrGetStatus(), XCsuDma_IsPaused(), XCsuDma_Pause(), XCsuDma_Resume(), XCsuDma_SelfTest(), and XCsuDma_SetConfig().

#define XCSUDMA_SIZE_MASK 0x1FFFFFFCU

Mask for size.

#define XCSUDMA_SIZE_OFFSET 0x004U

Size Register Offset.

Referenced by XCsuDma_64BitTransfer(), XCsuDma_GetSize(), and XCsuDma_Transfer().

#define XCSUDMA_SIZE_SHIFT 2U

Shift for size.

Referenced by XCsuDma_64BitTransfer(), XCsuDma_GetSize(), and XCsuDma_Transfer().

#define XCSUDMA_STS_OFFSET 0x008U

Status Register Offset.

#define XCSUDMA_WORD_SIZE (4U)

Transfer size conversion to bytes for Versal Net.

Referenced by XCsuDma_64BitTransfer(), and XCsuDma_Transfer().

#define XCsuDma_WriteReg	(	BaseAddress,
		RegOffset,
		Data
	)	XCsuDma_Out32((BaseAddress) + (u32)(RegOffset), (u32)(Data))

This macro writes the value into the given register.

Parameters

BaseAddress	Base address of the CSU_DMA core.
RegOffset	Register offset of the register.
Data	32-bit value to write to the register.

Returns: None.

Note: C-style signature: void XCsuDma_WriteReg(u32 BaseAddress, u32 RegOffset, u32 Data)

Referenced by XCsuDma_64BitTransfer(), XCsuDma_ClearCheckSum(), XCsuDma_DisableIntr(), XCsuDma_EnableIntr(), XCsuDma_IntrClear(), XCsuDma_Pause(), XCsuDma_Resume(), XCsuDma_SelfTest(), XCsuDma_SetConfig(), and XCsuDma_Transfer().

Enumeration Type Documentation

enum XCsuDma_Channel

This typedef contains CSU_DMA Channel Types.

Enumerator
XCSUDMA_SRC_CHANNEL	Source Channel of CSU_DMA.
XCSUDMA_DST_CHANNEL	Destination Channel of CSU_DMA.

Function Documentation

void XCsuDma_64BitTransfer	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel,
		u32	AddrLow,
		u32	AddrHigh,
		u32	Size,
		u8	EnDataLast
	)

This function sets the starting address and size of the data to be transferred from/to the memory through the AXI interface.

This function is useful for pmu processor to execute a 64-bit DMA transfer.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL
AddrLow	Bit variable which holds the starting lower address of data which needs to write into the memory(DST) (or read from the memory(SRC)).
AddrHigh	32 bit variable which holds the higher address of data which needs to write into the memory(DST) (or read from the memoroy(SRC)).
Size	32 bit variable which represents the number of 4 byte words to be transferred from starting address.
EnDataLast	Trigger an end of message. Enables or disable data_inp_last signal to stream interface when current command is completed. Only applicable for the source channel; ignored for destination channel. 1 - Asserts data_inp_last signal. 0 - data_inp_last will not be asserted.

Returns: None.

Note: Data_inp_last signal is asserted simultaneously with the data_inp_valid signal associated with the final 32-bit word transfer. This API does not invalidate the DMA buffer. It is recommended to call this API only through PMU processor.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCsuDma::IsReady, XCSUDMA_ADDR_OFFSET, XCSUDMA_DST_CHANNEL, XCSUDMA_LAST_WORD_MASK, XCSUDMA_SIZE_MAX, XCSUDMA_SIZE_OFFSET, XCSUDMA_SIZE_SHIFT, XCSUDMA_SRC_CHANNEL, XCSUDMA_WORD_SIZE, and XCsuDma_WriteReg.

s32 XCsuDma_CfgInitialize	(	XCsuDma *	InstancePtr,
		XCsuDma_Config *	CfgPtr,
		UINTPTR	EffectiveAddr
	)

This function initializes CSU_DMA core.

This function must be called prior using a CSU_DMA core. Initialization of an CSU_DMA includes setting up the instance data and ensuring the hardware is in a quiescent state.

Parameters

InstancePtr	Pointer to the XCsuDma instance.
CfgPtr	Reference to a structure containing information about a specific XCsuDma instance.
EffectiveAddr	Device base address in the virtual memory address space. The caller is responsible for keeping the address mapping from EffectiveAddr to the device physical base address unchanged once this function is invoked. Unexpected errors may occur if the address mapping changes after this function is called. If address translation is not used, pass in the physical address instead.

Returns

XST_SUCCESS if initialization was successful.

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCsuDma_Config::DmaType, XCsuDma::IsReady, XCSUDMA_DMATYPEIS_CSUDMA, and XCsuDma_Reset.

Referenced by XCsuDma_IntrExample(), XCsuDma_PolledExample(), and XCsuDma_SelfTestExample().

void XCsuDma_ClearCheckSum ( XCsuDma * InstancePtr )

This function clears the check sum of the data read from AXI memory.

It is valid only for CSU_DMA source channel.

Parameters

InstancePtr Pointer to XCsuDma instance to be worked on.

Returns: The sum of all the data read from memory.

Note: Before the transfer starts, clear this register to get correct sum. Otherwise, it adds to previous value which results in an incorrect output.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, and XCsuDma_WriteReg.

void XCsuDma_DisableIntr	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel,
		u32	Mask
	)

This function disables the interrupt(s).

Use the XCSUDMA_IXR_*_MASK constants defined in xcsudma_hw.h to create the bit-mask to disable interrupts.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL
Mask	Contains interrupts to be disabled. Bit positions of 1 will be disabled. This mask is formed by OR'ing XCSUDMA_IXR_*_MASK bits defined in xcsudma_hw.h.

Returns: None.

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCSUDMA_DST_CHANNEL, XCSUDMA_IXR_DST_MASK, XCSUDMA_IXR_SRC_MASK, XCSUDMA_SRC_CHANNEL, and XCsuDma_WriteReg.

Referenced by XCsuDma_IntrExample().

void XCsuDma_EnableIntr	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel,
		u32	Mask
	)

This function enables the interrupt(s).

Use the XCSUDMA_IXR_*_MASK constants defined in xcsudma_hw.h to create the bit-mask to enable interrupts.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL
Mask	Contains interrupts to be enabled. Bit positions of 1 will be enabled. This mask is formed by OR'ing XCSUDMA_IXR_*_MASK bits defined in xcsudma_hw.h.

Returns: None.

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCSUDMA_DST_CHANNEL, XCSUDMA_IXR_DST_MASK, XCSUDMA_IXR_SRC_MASK, XCSUDMA_SRC_CHANNEL, and XCsuDma_WriteReg.

Referenced by XCsuDma_IntrExample().

u64 XCsuDma_GetAddr	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel
	)

This function returns the current address location of the memory, from where it has to read the data(SRC) or the location where it has to write the data (DST) based on the channel selection.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL

Returns

Address is a 64 bit variable which holds the current address.

From this location data has to be read(SRC)
At this location data has to be written(DST)

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCSUDMA_ADDR_OFFSET, XCSUDMA_DST_CHANNEL, XCsuDma_ReadReg, and XCSUDMA_SRC_CHANNEL.

u32 XCsuDma_GetCheckSum ( XCsuDma * InstancePtr )

This function returns the sum of all the data read from AXI memory.

It is valid only when using the CSU_DMA source channel.

Parameters

InstancePtr Pointer to XCsuDma instance to be worked on.

Returns: The sum of all the data read from memory.

Note: Before the transfer starts, clear this register to get the correct sum. Otherwise, it adds to previous value which results in an incorrect output. Valid only for source channel.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCsuDma::IsReady, and XCsuDma_ReadReg.

void XCsuDma_GetConfig	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel,
		XCsuDma_Configure *	ConfigurValues
	)

This function updates XCsuDma_Configure structure members with the configured values of CSU_DMA's Channel.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL
ConfigurValues	Pointer to the structure XCsuDma_Configure whose members are updated with configurations of CSU_DMA core. SssFifoThesh: When the DST FIFO level >= this value, the SSS interface signal, "data_out_fifo_level_hit" will be asserted. This mechanism can be used by the SSS to flow control data that is being looped back from the SRC DMA. Range is (0x10 to 0x7A) threshold is 17 to 123 entries. It is valid only for DST CSU_DMA IP. ApbErr: When accessed to invalid APB the resulting pslerr will be 0 - 1'b0 1 - 1'b1 EndianType: Type of endianness 0 doesn't change order 1 will flip the order. AxiBurstType: Type of the burst 0 will issue INCR type burst 1 will issue FIXED type burst TimeoutValue: Time out value for timers 0x000 to 0xFFE are valid inputs 0xFFF clears both timers FifoThresh: Programmed watermark value Range is 0x00 to 0x80 (0 to 128 entries). Acache: Sets the AXI CACHE bits on the AXI Write/Read channel. Cacheable ARCACHE[1] for SRC Channel and AWCACHE[1] for DST channel are always 1, we need to configure remaining 3 signal support (Bufferable, Read allocate and Write allocate). Valid inputs are: 0x000 - Cacheable, but do not allocate 0x001 - Cacheable and bufferable, but do not allocate 0x010 - Cacheable write-through, allocate on reads only 0x011 - Cacheable write-back, allocate on reads only 0x100 - Cacheable write-through, allocate on writes only 0x101 - Cacheable write-back, allocate on writes only 0x110 - Cacheable write-through, allocate on both reads and writes 0x111 - Cacheable write-back, allocate on both reads and writes RouteBit: To select route 0 : Command will be routed based normally 1 : Command will be routed to APU's cache controller TimeoutEn: To enable or disable time out counters 0 : The 2 Timeout counters are disabled 1 : The 2 Timeout counters are enabled TimeoutPre: Set the prescaler value for the timeout in clk (~2.5ns) cycles Range is 0x000(Prescaler enables timer every cycles) to 0xFFF(Prescaler enables timer every 4096 cycles) MaxOutCmds: Controls the maximumum number of outstanding AXI read commands issued. Range is 0x0(Up to 1 Outstanding Read command allowed) to 0x8 (Up to 9 Outstanding Read command allowed)

Returns: None.

Note: None.

References XCsuDma_Configure::Acache, XCsuDma_Configure::ApbErr, XCsuDma_Configure::AxiBurstType, XCsuDma_Config::BaseAddress, XCsuDma::Config, XCsuDma_Configure::EndianType, XCsuDma_Configure::FifoThresh, XCsuDma_Configure::MaxOutCmds, XCsuDma_Configure::RouteBit, XCsuDma_Configure::SssFifoThesh, XCsuDma_Configure::TimeoutEn, XCsuDma_Configure::TimeoutPre, XCsuDma_Configure::TimeoutValue, XCSUDMA_CTRL_OFFSET, XCSUDMA_DST_CHANNEL, XCsuDma_ReadReg, and XCSUDMA_SRC_CHANNEL.

u32 XCsuDma_GetIntrMask	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel
	)

This function returns the interrupt mask to know which interrupts are enabled and which of them were disaled.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL

Returns

The current interrupt mask. The mask indicates which interrupts are enabled/disabled.

0 bit represents that the corresponding interrupt is enabled.
1 bit represents that the Corresponding interrupt is disabled. To interpret returned mask use
XCSUDMA_IXR_SRC_MASK that the For source channel
XCSUDMA_IXR_DST_MASK that the For destination channel

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCSUDMA_DST_CHANNEL, XCsuDma_ReadReg, and XCSUDMA_SRC_CHANNEL.

u32 XCsuDma_GetSize	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel
	)

This function returns the size of the data yet to be transferred from memory to CSU_DMA or CSU_DMA to memory based on the channel selection.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL

Returns: Returns number of bytes of data yet to be transferred.

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCSUDMA_DST_CHANNEL, XCsuDma_ReadReg, XCSUDMA_SIZE_OFFSET, XCSUDMA_SIZE_SHIFT, and XCSUDMA_SRC_CHANNEL.

void XCsuDma_IntrClear	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel,
		u32	Mask
	)

This function clears interrupt(s).

Every bit set in Interrupt Status Register indicates that a specific type of interrupt is occurring, and this function clears one or more interrupts by writing a bit mask to Interrupt Clear Register.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL
Mask	Mask to clear. Bit positions of 1 will be cleared. Bit positions of 0 will not change the previous interrupt status. This mask is formed by OR'ing XCSUDMA_IXR_* bits defined in xcsudma_hw.h.

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCSUDMA_DST_CHANNEL, XCSUDMA_I_STS_OFFSET, XCSUDMA_IXR_DST_MASK, XCSUDMA_IXR_SRC_MASK, XCSUDMA_SRC_CHANNEL, and XCsuDma_WriteReg.

Referenced by XCsuDma_IntrExample(), and XCsuDma_PolledExample().

u32 XCsuDma_IntrGetStatus	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel
	)

This function returns interrupt status read from Interrupt Status Register.

Use the XCSUDMA_IXR_*_MASK constants defined in xcsudma_hw.h to interpret the returned value.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL

Returns: The pending interrupts of the CSU_DMA. Use th following masks to interpret the returned value. XCSUDMA_IXR_SRC_MASK - For Source channel XCSUDMA_IXR_DST_MASK - For Destination channel

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCSUDMA_DST_CHANNEL, XCSUDMA_I_STS_OFFSET, XCsuDma_ReadReg, and XCSUDMA_SRC_CHANNEL.

s32 XCsuDma_IsPaused	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel,
		XCsuDma_PauseType	Type
	)

This function checks whether Channel memory/stream is paused based on the given pause type.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL
Type	Type of the pause which needs to be checked. XCSUDMA_PAUSE_MEMORY(0) - Pause memory SRC stops issuing new read commands to memory. DST stops issuing new write commands to memory. XCSUDMA_PAUSE_STREAM(1) - Pause stream SRC stops the transfer of data from FIFO to Stream. DST stops the transfer of data from stream to FIFO.

Returns

Returns the pause status.

TRUE if it is in paused state.
FALSE if it is not in pause state.

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCSUDMA_CTRL_OFFSET, XCSUDMA_DST_CHANNEL, XCSUDMA_PAUSE_MEMORY, XCSUDMA_PAUSE_STREAM, XCsuDma_ReadReg, and XCSUDMA_SRC_CHANNEL.

XCsuDma_Config* XCsuDma_LookupConfig ( u16 DeviceId )

XCsuDma_LookupConfig returns a reference to an XCsuDma_Config structure based on the unique device id, DeviceId.

The return value will refer to an entry in the device configuration table defined in the xcsudma_g.c file.

Parameters

DeviceId Unique device ID of the device for the lookup operation.

Returns: CfgPtr is a reference to a config record in the configuration table (in xcsudma_g.c) corresponding to DeviceId, or NULL if no match is found.

Note: None.

Referenced by XCsuDma_IntrExample(), XCsuDma_PolledExample(), and XCsuDma_SelfTestExample().

void XCsuDma_Pause	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel,
		XCsuDma_PauseType	Type
	)

This function pauses the Channel data transfer to/from memory or to/from stream based on pause type.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL
Type	Type of pause to be enabled. XCSUDMA_PAUSE_MEMORY(0) - Pause memory SRC stops issuing new read commands to memory. DST stops issuing new write commands to memory. XCSUDMA_PAUSE_STREAM(1) - Pause stream SRC stops the transfer of data from FIFO to Stream. DST stops the transfer of data from stream to FIFO.

Returns: None.

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCsuDma::IsReady, XCSUDMA_CTRL_OFFSET, XCSUDMA_DST_CHANNEL, XCSUDMA_PAUSE_MEMORY, XCSUDMA_PAUSE_STREAM, XCsuDma_ReadReg, XCSUDMA_SRC_CHANNEL, and XCsuDma_WriteReg.

void XCsuDma_Resume	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel,
		XCsuDma_PauseType	Type
	)

This function resumes the channel if it is in paused state and continues where it has left.

Based on the type of pause, there is no effect if it is not in paused state.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL
Type	Type of pause to be resumed if it is paused. XCSUDMA_PAUSE_MEMORY(0) - Pause memory SRC stops issuing new read commands to memory. DST stops issuing new write commands to memory. XCSUDMA_PAUSE_STREAM(1) - Pause stream SRC stops the transfer of data from FIFO to Stream. DST stops the transfer of data from stream to FIFO.

Returns: None.

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCsuDma::IsReady, XCSUDMA_CTRL_OFFSET, XCSUDMA_DST_CHANNEL, XCSUDMA_PAUSE_MEMORY, XCSUDMA_PAUSE_STREAM, XCsuDma_ReadReg, XCSUDMA_SRC_CHANNEL, and XCsuDma_WriteReg.

s32 XCsuDma_SelfTest ( XCsuDma * InstancePtr )

This function runs a self-test on the driver and hardware device.

Performs reset of both source and destination channels and checks if reset is working properly or not.

Parameters

InstancePtr Pointer to the XCsuDma instance.

Returns

XST_SUCCESS if the self-test passed.
- XST_FAILURE otherwise.

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCSUDMA_CTRL_OFFSET, XCsuDma_ReadReg, and XCsuDma_WriteReg.

Referenced by XCsuDma_IntrExample(), XCsuDma_PolledExample(), and XCsuDma_SelfTestExample().

void XCsuDma_SetConfig	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel,
		XCsuDma_Configure *	ConfigurValues
	)

This function configures all the values of CSU_DMA Channels with the values of updated XCsuDma_Configure structure.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL
ConfigurValues	Pointer to the structure XCsuDma_Configure whose values are used to configure CSU_DMA core. SssFifoThesh: When the DST FIFO level >= this value, the SSS interface signal, "data_out_fifo_level_hit" is asserted. This mechanism can be used by the SSS to flow control data that is being looped back from the SRC DMA. Range is (0x10 to 0x7A) threshold is 17 to 123 entries. It is valid only for DST CSU_DMA IP. ApbErr: When accessed to invalid APB the resulting pslerr will be 0 - 1'b0 1 - 1'b1 EndianType: Type of endianness 0 doesn't change order 1 will flip the order. AxiBurstType: Type of the burst 0 will issue INCR type burst 1 will issue FIXED type burst TimeoutValue: Time out value for timers 0x000 to 0xFFE are valid inputs 0xFFF clears both timers FifoThresh: Programmed watermark value Range is 0x00 to 0x80 (0 to 128 entries). Acache: Sets the AXI CACHE bits on the AXI Write/Read channel. Cacheable ARCACHE[1] for SRC Channel and AWCACHE[1] for DST channel are always 1, we need to configure remaining 3 signal support (Bufferable, Read allocate and Write allocate). Valid inputs are: 0x000 - Cacheable, but do not allocate 0x001 - Cacheable and bufferable, but do not allocate 0x010 - Cacheable write-through, allocate on reads only 0x011 - Cacheable write-back, allocate on reads only 0x100 - Cacheable write-through, allocate on writes only 0x101 - Cacheable write-back, allocate on writes only 0x110 - Cacheable write-through, allocate on both reads and writes 0x111 - Cacheable write-back, allocate on both reads and writes RouteBit: To select route 0 : Command will be routed normally 1 : Command will be routed to APU's cache controller TimeoutEn: To enable or disable time out counters 0 : The 2 Timeout counters are disabled 1 : The 2 Timeout counters are enabled TimeoutPre: Set the prescaler value for the timeout in clk (~2.5ns) cycles Range is 0x000(Prescaler enables timer every cycles) to 0xFFF(Prescaler enables timer every 4096 cycles) MaxOutCmds: Controls the maximumum number of outstanding AXI read commands issued. Range is 0x0(Up to 1 Outstanding Read command allowed) to 0x8 (Up to 9 Outstanding Read command allowed)

Returns: None.

Note: To use timers timeout value Timeout enable field should be enabled. Users should check for the status of existing transfers before making configuration changes.

void XCsuDma_Transfer	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel,
		u64	Addr,
		u32	Size,
		u8	EnDataLast
	)

This function sets the starting address and size of the data to be transferred from/to the memory through the AXI interface.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL
Addr	64 bit variable which holds the starting address of data which needs to write into the memory(DST) (or read from the memory(SRC)).
Size	32 bit variable which represents the number of 4 byte words needs to be transferred from starting address.
EnDataLast	Triggers an end of the message. Enables or disables data_inp_last signal to stream interface when current command is completed. It is applicable only to source channel; ignored for destination channel. 1 - Asserts data_inp_last signal. 0 - data_inp_last will not be asserted.

Returns: None.

Note: Data_inp_last signal is asserted simultaneously with the data_inp_valid signal associated with the final 32-bit word transfer.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCsuDma::IsReady, XCSUDMA_ADDR_OFFSET, XCSUDMA_DST_CHANNEL, XCSUDMA_LAST_WORD_MASK, XCSUDMA_SIZE_MAX, XCSUDMA_SIZE_OFFSET, XCSUDMA_SIZE_SHIFT, XCSUDMA_SRC_CHANNEL, XCSUDMA_WORD_SIZE, and XCsuDma_WriteReg.

Referenced by XCsuDma_IntrExample(), and XCsuDma_PolledExample().

u32 XCsuDma_WaitForDoneTimeout	(	XCsuDma *	InstancePtr,
		XCsuDma_Channel	Channel
	)

This function polls for completion of data transfer periodically until the DMA done bit set or until the timeout occurs.

Parameters

InstancePtr	Pointer to XCsuDma instance to be worked on.
Channel	Type of channel Source channel - XCSUDMA_SRC_CHANNEL Destination Channel - XCSUDMA_DST_CHANNEL

Returns: XST_SUCCESS - In case of Success XST_FAILURE - In case of Timeout.

Note: None.

References XCsuDma_Config::BaseAddress, XCsuDma::Config, XCSUDMA_DONE_TIMEOUT_VAL, XCSUDMA_DST_CHANNEL, XCSUDMA_I_STS_OFFSET, XCSUDMA_IXR_DONE_MASK, and XCSUDMA_SRC_CHANNEL.

Macros

Enumerations

Functions

Registers offsets

Size register bit masks and shifts

Interrupt Enable/Disable/Mask/Status registers bit masks

Software done timeout value

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation